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Battery Management System 750A for Li-Ion, LiFePO4 chemistries Smart BMS. 13s 48V, 10s 36V, 16s 48V, 7s 24V BMS, Battery Monitoring and Control System CE Certified and Produced in EU
Battery insider v2.5.0.9 (Windows) Battery Management System For Prototype And Industrial Applications 150A BMS, 750A BMS

Battery Management System BMS 750A Set – TinyBMS s516

BMS Technical Specifications:

• Number of cells: 4 – 16
• One cell voltage: 0.8 – 4.5 V
• Battery pack voltage: DC 9.0 V – 75 V
• Operating temperature: -40°C to +85°C
• Balancing current: 150mA (@4.2V)
• Individual cell voltage measurement resolution: 1mV
• Charge current: 30A continuous; ±750 with external relay / contactor and current sensor
• Discharge/Regen current: ±50 continuous; ±60 continuous (mounted on cool surface); ±150 peak (up 10 sec.); ±750 with external relay / contactor and current sensor
• External temperature sensors measurement resolution 0.1⁰C
• BMS Measurements: 113 x 65 x 11 mm
• Weight: 0.193kg (with LEM current sensor)
• HS code: 8537109100

• UART
• USB (with USB-UART cable)
• CAN (with UART to CAN converter) /available below or at checkout/
• Wireless Smartphone connectivity interface (with addition Bluetooth module) /available below or at checkout/

• Cell voltages and temperatures measurement
• Capability to read Enepaq multipoint temperature sensor integrated in battery modules
• Internal battery current measurement (up to 200A)
• External battery current measurement (up to 750A)
• Dissipative balancing up to 150mA
• Protections and warnings adjustable on Control Panel
• Integrated contactor to protect the battery
• External contactor control capability
• Connectivity to smartphones App (Ebike Analyzer)
• Interface that is intended for quick and straightforward connection to a host device (e.g. computer) when configuration, diagnostics, or maintenance is needed (via USB-UART cable) /available below or at checkout/
• CAN connectivity (via UART to CAN converter)
• Capability to log live data from TinyBMS with USB-UART cable.
• Internal TinyBMS events logger for troubleshooting (BMS states, warming and etc.)
• State of Charge (SOC) calculations /SOC-BAR LED available below or at checkout/
• Speed sensor input

  • Lifetime Customer Support
  • In Stock – Worldwide Shipping within a week.
  • Contact us for discount on first and bulk orders (up to 30%)!

Enepaq can tailor unique firmware and hardware BMS features to align with your unique project requirements.

Looking to buy locally? Check out our network of distributors.
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Description

High-Current and Customizable Battery Management System: Tiny BMS s516 (750A Peak Discharge)

Battery Management System (BMS) 750A the Tiny BMS is an essential component of every Lithium battery. Enepaq Tiny BMS supports lithium batteries of any chemistry and up to 60 V nominal. Battery capacity from sub-1 Ah to 655 Ah can be managed easily. Tiny BMS measures individual voltages of parallel cell groups and manages switching of load and charger. During charging, cells are balanced by bleeding-off higher cells to accomplish full balance and maintain good health of battery pack. State-of-Charge is calculated as well, and is available via communication bus to be displayed for user.

Safe and Secure Battery Connection

For safe and reliable operation, it’s crucial to follow the correct sequence when connecting the Tiny BMS s516 to your battery pack. Improper connection can damage both the battery and the BMS. For detailed instructions, please refer to the Tiny BMS s516 manual page 12, paragraph 2.3.2., Tiny BMS battery pack connection sequence. This section outlines the step-by-step process for safe battery pack connection.

Smart battery management system (BMS) key Features:

  • High-Current Handling: Manage battery packs with discharge currents up to 750A (peak) and sustained currents of 60A, making it suitable for high-power applications.
  • Advanced Cell Management:
    • Monitor individual cell voltages of 4 to 16 series-connected Lithium-ion cells (4s-16s).
    • Balance cells to maintain equal charge levels and prolong battery life through dissipative balancing up to 150 mA.
  • Comprehensive Protection:
    • Voltage and Current Cutoff Protection: Disconnects the battery to prevent over-charging or over-discharging through programmable voltage thresholds.
    • Battery pack thermal management: Monitors battery temperature and can be configured to take corrective actions, such as reducing charge or discharge current, to prevent overheating. Shuts down the battery pack if it exceeds user-defined temperature limits measured by internal or external sensors (supports up to two external temperature sensors).
    • Automatic Recovery: Recovers from warning or fault states after a timeout period or manual intervention.

Highly Customizable BMS Solution:

The Tiny BMS s516 goes beyond standard features to offer extensive customization possibilities:

  • Tailor-made Solutions: Our company provides firmware and hardware customization to perfectly align with your unique project requirements.
  • Integrated Power Management: Built-in 150A power switches streamline system design.
  • Flexible Connectivity: Supports various communication protocols including UART, MODBUS, CAN, and Bluetooth for easy integration.
  • Wide Range Compatibility: Works with 12V to 60V battery systems (4s-16s) and all lithium chemistries.
  • Adjustable Parameters: Fine-tune voltage, current, and temperature settings for optimal performance.
  • Advanced Features:
    • Dissipative Balancing up to 150 mA
    • Supports up to two external temperature sensors and one dual-range current sensor
    • Event Log and Usage Statistics for in-depth analysis
    • Free Firmware Upgrades to ensure your BMS stays up-to-date
    • Programmable Inputs and Outputs for expanded functionality
  • Compact Design: Ultra-compact design (95x65x9 mm and only 97g) maximizes space efficiency in your application.
  • Current Sensor Connection: Simplifies integration with external current sensors.

Battery Insider Software for Superior BMS Monitoring and Control:

The Tiny BMS s516 is paired with the Battery Insider software, a user-friendly interface that provides comprehensive configuration and monitoring capabilities:

  • Configuration:
    • Define cell settings (voltage thresholds, balancing)
    • Set discharge and charge current limits
    • Program temperature protection
    • Configure automatic recovery settings
    • Select BMS operation mode (single port/dual port)
    • Manage external components (charger, load, contactor, temperature sensors)
  • Real-time Monitoring: View critical battery parameters like cell voltages, currents, temperatures, and state of charge.
  • Data Analysis:
    • Event Logging: Track BMS events and diagnose potential issues.
    • Lifetime Statistics: Gain insights into battery usage patterns.
    • Data Logging: Perform detailed analysis of BMS behavior.
  • Firmware Updates: Keep your BMS up-to-date with the latest firmware.

Benefits:

  • Protects Lithium-ion batteries from damage caused by over-charging, over-discharging, excessive current, and temperature extremes.
  • Extends battery life through cell balancing and improved safety features.
  • Enables informed maintenance decisions through comprehensive battery parameter monitoring.
  • Provides advanced data analysis for troubleshooting and performance optimization.
  • Offers user-friendly software for easy configuration and management of the high-current BMS.
  • Highly Customizable: Tailor the BMS to your specific project needs with firmware and hardware customization options.

Overall, the Tiny BMS s516 with Battery Insider software is a comprehensive and customizable solution for high-current Lithium-ion and LiFePO4 battery management, offering a high degree of control, protection, and monitoring capabilities for demanding applications.

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Downloads

DATASHEET  – Battery Management System (BMS) for Tiny BMS Enepaq

USER MANUAL – Battery Management System (BMS)  for Tiny BMS Enepaq

Quick Start Guide – Battery Management System (BMS) for Tiny BMS Enepaq

Communication Protocols – Battery Management System (BMS) Tiny BMS Enepaq

BMS Firmware Release Notes

Tiny BMS Insider Software (v2.5.0.9 Windows)

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BMS Insider Software

Free Download – Tiny BMS Insider Software (v2.5.0.9 Windows)

Battery insider v2.5.0.9 (Windows) Live Data Battery Management System For Prototype And Industrial Applications 30A, 150A BMS, 750A BMS

Smart Battery Management system (BMS) 750A – ‘Tiny BMS s516’ Battery Insider Windows application suggests a user-friendly graphical interface for settings and monitoring and can be configured using two methods:

  1. UART, MODBUS or CAN communication commands: This indicates flexibility for integration with existing industrial systems through text-based protocols.
  2. Battery Insider Software Features: The Battery Insider software offers a comprehensive suite of features for monitoring and managing the Tiny BMS s516, including:
  • Live Data: Real-time monitoring of various battery parameters like individual cell voltages, charging/discharging current, battery pack voltage, and temperature.
  • Cell Balancing: The software can identify cells undergoing balancing and visualize their status.
  • State-of-Charge (SoC): Estimation of the remaining battery capacity.
  • Event Logging: Recording of BMS events for troubleshooting and analysis.
  • Communication Status: Monitoring of the communication health between the BMS and the software.
  • Data Logging: Ability to log BMS data for further analysis.
  • NTC Temperature Monitoring: Monitoring of internal and external battery pack temperatures (up to 2 sensors).
  • Event Monitoring: The Battery Insider software provides a dedicated tab for viewing a list of BMS events.
  • Event Types: The BMS can record different types of events, including:
    • Informational events (likely for notification purposes)
    • Warning events (indicating potential issues)
    • Fault events (indicating critical problems)
  • Event Details: Each event record likely includes:
    • Timestamp
    • Description of the event
    • HEX code (possibly for advanced users or diagnostics)
  • Event Clearing: A “Clear Events” button allows users to clear the event log from the BMS’s internal memory. However, it’s important to note that this does not necessarily clear the warning or fault condition itself.
  • BMS Recovery: The BMS can recover from warning or fault states automatically after a timeout or by meeting certain conditions, such as:
    • All triggering conditions are cleared.
    • The battery voltage rises above the under-voltage cutoff threshold (and the charger is connected or the BMS is restarted).
    • The charger is connected to the BMS, or the BMS is restarted manually, or the ignition signal is toggled (if enabled).

The Battery Insider software for monitors the health and safety of the battery pack by tracking events and understanding their implications.

—

  • Battery Lifetime Statistics: The Tiny BMS s516 tracks and stores various statistics over its lifetime. These statistics are apparently non-volatile, meaning the data is preserved even if the battery is disconnected from the BMS.
  • Battery Insider Statistics Tab: The Battery Insider software provides a dedicated “Statistics” tab to view these lifetime statistics. The exact data points tracked aren’t mentioned in this excerpt, but the image suggests it might include:
    • Maximum discharge current
    • Maximum charge current
    • Maximum cell voltage difference
    • Under-voltage protection count
    • Over-voltage protection count
    • Discharge over-current protection count
    • Charge over-current protection count
    • Over-heat protection count
    • Charging count
    • Fully charged count
    • Minimum and Maximum pack temperatures
  • Clearing Statistics: The BMS allows users to clear all lifetime statistics using the “Clear Statistics” button within the Battery Insider software. It’s important to note that this action permanently erases the data from the BMS memory.

The Battery Insider software is a valuable tool for understanding the long-term health and performance of the battery pack. By monitoring lifetime statistics, users can gain insights into factors like charging cycles, temperature extremes, and potential protection events experienced by the battery pack.

—

  • Cell Settings: The Battery Insider software allows for comprehensive configuration of various cell parameters within the Tiny BMS s516.
  • Voltage Cutoff Thresholds: Users can set critical voltage thresholds to prevent over-charging and over-discharging of the battery pack. The software enforces a hierarchy where the Fully Charged Voltage must be within the range of Over-Voltage Cutoff and Fully Discharged Voltage, and the Fully Discharged Voltage must be within the range of Fully Charged Voltage and Under-Voltage Cutoff.
  • Charge Finished Current: This setting determines the minimum current at which the BMS considers charging to be complete. Different BMS models and configurations may have limitations on this value.
  • Balancing Threshold and Allowed Disbalance: These settings control the automatic cell balancing behavior within the BMS. Cell balancing helps to maintain equal voltages across all cells in the battery pack, thereby extending its lifespan.
  • Number of Series Cells: This setting allows the user to configure the BMS for the specific number of series-connected cells within the battery pack.
  • Battery Capacity: The user can specify the total capacity (Ah) of the battery pack.
  • State-of-Charge (SoC): The Battery Insider software allows for manually setting the estimated remaining capacity of the battery pack.
  • Upload to BMS: This button commits all configuration changes from the Battery Insider software to the BMS hardware.
  • Safety Settings: The Battery Insider software allows configuration of various safety parameters within the Tiny BMS s516 to protect the battery pack from damage:
    • Over-voltage and Under-voltage Cutoff: These settings define the voltage thresholds at which the BMS will automatically disconnect the battery to prevent over-charging or over-discharging.
    • Discharge and Charge Over-current Cutoff: These settings define the current thresholds at which the BMS will cut off discharge or charging current to prevent excessive current flow. The allowable current limits depend on the specific BMS model, configuration, and current sensor used.
    • Over-temperature Cutoff: The BMS can shut down if the battery pack temperature exceeds the user-defined maximum threshold.
    • Low-Temperature Charger Cutoff: The BMS can prevent charging if the battery pack temperature falls below the user-defined minimum threshold.
  • Automatic Recovery: The BMS can automatically recover from warning or fault conditions after a timeout period set by the user. Alternatively, automatic recovery can be disabled, in which case, recovery would require manual intervention (restarting the BMS, connecting a charger, or toggling the ignition signal if enabled).

The Battery Insider software equips users with comprehensive control over the safety features of the Tiny BMS s516, allowing them to optimize protection for their specific battery pack application.

—

Data Logging: This feature allows you to record BMS data over time for later analysis.

  • Data Selection: You can choose which specific BMS data points to include in the log file. The image doesn’t show the available data points, but it likely includes parameters like cell voltages, currents, temperatures, and battery pack voltage/current.
  • Logging Interval: This setting determines the frequency at which BMS data is recorded in the log file. It can range from 1 second to 1 hour (3600 seconds).
  • Log File Size: This setting defines the maximum size of the log file. The BMS can automatically start a new log file when the current file reaches this size limit. The allowed range is from 2 MB to 1024 MB (1 GB).
  • Start Logging from Beginning: When enabled, this option will cause the BMS to start writing data at the beginning of the log file again when it reaches the maximum file size, effectively overwriting the oldest data.
  • Start/Stop Logging: These buttons allow you to manually control the logging process. You can start logging data or stop it completely.

Overall, the “Log to file” settings tab in Battery Insider equips users with a valuable tool for capturing BMS data at desired intervals and file sizes. This data can be useful for troubleshooting BMS behavior, monitoring battery health over time, and optimizing performance.

—

BMS Operation Mode: This setting allows you to configure the BMS for either:

  • Dual Port operation: This mode uses separate ports for charging (C-port) and discharging (L-port) of the battery pack.
  • Single Port operation: In this mode, the same C-port is used for both charging and discharging.

Load and Charger Switch Type: These settings determine how the BMS controls the connection of the battery pack to the load (device using battery power) and charger. You can choose between:

  • Internal FET: The BMS uses its built-in FET (electronic switch) to manage connection.
  • External relay/contactor: The BMS provides a control signal to an external relay or contactor for switching. This option is only available on high power 150A BMS models.

Ignition Feature (for high power 150A BMS only): This feature allows you to control the BMS based on an ignition signal, potentially from a vehicle. You can set the signal level for ignition on and off.

Precharge Feature (for high power 150A BMS only): This feature enables a pre-charge stage at a lower current before full connection to the load. You can choose to use either the internal FET or an external output pin for pre-charge control.

Charger Detection: This setting allows you to configure how the BMS detects a connected charger. You can choose between:

  • Internal detection: The BMS uses its built-in circuitry to detect the charger.
  • External input pin: The BMS relies on a signal on a designated pin to determine charger connection.

Speed Sensor Input (optional): This setting enables the BMS to calculate speed (likely for electric vehicles) based on a signal from a speed sensor.

Broadcast Protocol: This setting allows you to configure how the BMS transmits data to other devices. You can choose between:

  • CA V3: Used for communication with the Ebike Analyzer Android App.
  • ASCII: Broadcasts BMS data in a text format.
  • SOC BAR: Used for communication with an LED indicator for displaying the State of Charge (SOC) of the battery pack.

Broadcast: This setting enables or disables the periodic broadcast of BMS data according to the chosen protocol.

Temperature Sensor Type: This setting allows you to select the type of temperature sensor used for monitoring the battery pack.

The Peripheral settings tab in Battery Insider provides comprehensive control over how the Tiny BMS s516 interacts with external components and communicates data. This level of control allows for customization based on the specific application of the battery pack.

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Videos

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Certificates

CE Certificate (EU Declaration of Conformity)

ISO 14001:2015

ISO 9001:2015

EMC (Electromagnetic Compatibility)

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Additional Information

Set Components

1. USB–UART Communication Cable

Using Battery Management System (Tiny BMS) UART commands it is possible:

  • setup all settings
  • read back and monitor live data, events, statistics,
  • UART communication interface is the main Battery Management System (Tiny BMS) communication, enabled by default
  • USB-UART cable to Tiny BMS communication connector and Battery Insider automatically connects to BMS
  • wakeup BMS from sleep mode and all other tasks that BMS are intended to do for PC and custom systems.
  • Weight: 62 g.
  • HS code: 8544429000

USB–UART Communication Cable for Battery Management System (Tiny BMS) includes a single multi-purpose UART interface. In combination with various converters, the interface is compatible with USB, Bluetooth and CAN communication interfaces. Various proprietary commands are available for quick and straightforward connection to a PC Battery Insider application when configuration, diagnostics, or maintenance is needed. Also the main MODBUS protocol commands are supported for rapid integration to existing industrial systems. For more information about communication protocols refer to Battery Management System (Tiny BMS) communication protocols documentation.

UART communication interface is the main Battery Management System (Tiny BMS) communication, enabled by default. Using Tiny BMS UART commands it is possible to setup all settings, read back and monitor live data, events, statistics, wakeup Battery Management System (Tiny BMS) from sleep mode and all other tasks that BMS are intended to do for PC and custom systems. If USB-UART cable is used for Battery Management System (Tiny BMS) connection to a Windows Battery Insider application, it is no need any external steps of configuration, just plug USB-UART cable to Battery Management System (Tiny BMS) communication connector and Battery Insider automatically connects to Battery Management System (Tiny BMS), even if BMS is in deep sleep mode. Tiny BMS USB-UART converter is based on genuine Silicon Labs CP2102 chipset.

All recent Windows operating systems already include the drivers and cable will work straight away. If there is a problem, it is possible to download a driver version that is confirmed as compatible with Battery Management System (Tiny BMS) from Enepaq web store. Alternatively, driver can be downloaded directly from Silicon Labs support website, just make sure to get v6.7.3 or newer if you are running Windows 7 or later OS. When cable is connected, it will appear as a virtual COM port and Battery Insider application will connect to it automatically. When USB- UART communication is not necessary, any other communication module or SOC-BAR LED indicator can be connected to BMS communication interface connector. Only one Battery Management System (Tiny BMS) communication extension module can be connected to Tiny BMS at the same moment.

The USB-UART cable is galvanically isolated. Which gives you additional safety from ground loops and potential damage to equipment.

2. External LEM DHAB current sensor connector 750A

For higher current capability, external current sensor and contactors should be used. Currently supported current sensor is LEM DHAB S- 133, which is a dual-range sensor, with measurement range up to ±750 A. Lower range measures up to ±75 A and is used for higher accuracy measurement of low current. Switching of ranges is done automatically by Battery Management System (Tiny BMS) itself.

  • Weight: 96 g.
  • HS code: 9030900000

External LEM DHAB current sensor connector 750A for Battery Management System (Tiny BMS) can hold 150 A discharging current just for very short pulse current spikes (Table 2.1). For higher current capability, external current sensor and contactors should be used. Currently supported current sensor is LEM DHAB S – 133, which is a dual-range sensor, with measurement range up to ±750 A. Lower range measures up to ±75 A and is used for higher accuracy measurement of low current. Switching of ranges is done automatically by Battery Management System (Tiny BMS) itself. External current sensor to Battery Management System (Tiny BMS) system should be connected once at the setup stage of the battery pack.

Note: External current sensor is critical Battery Management System (Tiny BMS) and battery application component. After external current sensor has been connected to Battery Management System (Tiny BMS), BMS must be restarted by the user to confirm that external current sensor is used for battery application, otherwise Battery Management System (Tiny BMS) internal current sensor will be used for current measurement. For complete guide how to properly connect and use external current sensor refer to Chapter 4.

Connector part number, that mates with Battery Management System (Tiny BMS) board is PHR-4 made by JST and connector, that mates with LEM current sensor, part number is 1-1456426-5 made Tyco Electronics. When connecting external current sensor attention must be taken to the positive current direction, providing that high current wire is passed through current sensor in correct direction. Tiny BMS treats positive current from battery positive terminal to load / charger positive terminal.

Note: External current sensor should only be used along with external relay / contactor for load or charger control, when high current capability is needed. When external relay / contactor is used for load / charger switching high current path bypasses the Tiny BMS board and the internal current measurement is not possible.

Battery Management System (Tiny BMS) LEM external current sensor configuration External current sensor can be connected only to the 150 A high power Battery Management System (Tiny BMS) hardware version. Current sensor is the essential component of the battery application, therefore due to the safety reasons there is an important sequence how to connect and use LEM external current sensor.

3. Silicone Connection Cable (For 750A TinyBMS)

This Cable Set is Used to Connect the Cells to the Battery Management System (TinyBMS) 750A.

It is Characterized by its Excellent Temperature and Friction Behavior.

  • Length: 300mm
  • Cross section: 0.35mm²
  • Insulation: silicone (well suited for higher currents)
  • Connection: JST PH
  • Spacing: 2.0mm
  • 8-pin cable (2x)
  • 9-pin cable (1x)
  • 4-pin cable (1X)
  • 12-pin cable (1x)
  • Weight: 68 g.
  • HS code: 8538901900

4. Two Point Temperature Sensor (For TinyBMS)

Two Point Temperature Sensor for Battery Management System (Tiny BMS) has one on board NTC temperature sensor and supports two more external NTC temperature sensors (each per channel) or up to sixteen Enepaq multipoint active temperature sensors per Battery Management System (Tiny BMS) channel available in the Enepaq Cell Modules. Used temperature sensor type should be configured on Battery Insider windows application (see Chapter 4). Note that temperature sensor type configuration applied to both Battery Management System (Tiny BMS) temperature channels and different temperature sensor types cannot be used at the same time on different channels. Unused temperature sensor channel should be left unconnected. Once temperature sensor connected to BMS, it is recognized automatically and after few seconds measured temperature values are displayed on the Battery Insider application Live Data tab (see Chapter 4).

Dual NTC temperature sensor

Supported 10 K @ 25 °C (Beta value 3977 K) NTC temperature sensors. NTC thermistor should be connected between signal and ground pins of external temperature sensor connector.

Applications

The high current capacity of the Tiny BMS s516 makes it ideal for various demanding applications, including:

  • Battery Monitoring / Control System Unit for Industrial Equipment
  • Battery Monitoring / Control System Unit for Stationary Solar & Wind Storage
  • Battery Monitoring / Control System Unit for Electric Vehicles (Cars, Motorcycles, Buses)
  • Battery Monitoring / Control System Unit for Autonomous Systems (drones, robots, mobile robots)
  • Battery Monitoring / Control System Unit for Electric Bikes, Scooters, and Special Purpose Machines (e.g., lawnmowers)
  • Battery Monitoring / Control System Unit for Renewable Energy Storage
  • Battery Monitoring / Control System Unit for Unmanned Aerial Vehicles (UAVs)
  • Battery Monitoring / Control System Unit for Forklifts
  • Battery Monitoring / Control System Unit for AMRs (Autonomous Mobile Robots) and AGVs (Autonomous Guided Vehicles)
  • Battery Monitoring / Control System Unit for Unmanned Ground Vehicles (UGVs)
  • Battery Monitoring / Control System Unit for Unmanned Underwater Vehicles (UUVs)
  • Battery Monitoring / Control System Unit for Go-karts
  • Battery Monitoring / Control System Unit for Golf Carts
  • Battery Monitoring / Control System Unit for Agricultural Robotics
  • Battery Monitoring / Control System Unit for Custom Battery Pack Manufacturers
  • Battery Monitoring / Control System Unit for Delivery Robots

Battery Pack Configurations & BMS Current Ratings

The Tiny BMS s516 can be used with a variety of LiFePO4 and Li-ion batteries configurations. Here are the supported configurations:

1. Series Configurations (4s to 16s)

  • The Tiny BMS s516 supports battery packs with 4 to 16 series-connected lithium-ion cells (4s-16s).
  • This allows for battery packs with nominal voltages ranging from 12V to 60V, making it suitable for a wide range of applications.

2. Parallel Configurations

  • In addition to series configurations, the Tiny BMS s516 can manage battery packs with parallel cell groups. This is achieved by measuring the individual voltages of each parallel cell group.
  • The BMS can handle battery capacities from sub-1 Ah to 655 Ah, providing flexibility for various energy storage requirements.

3. Chemistry Compatibility

  • The Tiny BMS s516 is compatible with all lithium chemistries, ensuring broad applicability across different types of lithium batteries, including lithium iron phosphate (LiFePO4), lithium-ion (Li-ion), and lithium polymer (Li-Po).

Example Configurations by Voltage which ENEPAQ Battery Management System fits:

Configuration Voltage (Li-ion BMS) Configuration Voltage (LiFePO4 BMS)
4s 12V Li-ion Battery Pack BMS (Total Voltage: 14.4V (nominal)) 4s 12V LiFePO4 Battery Pack BMS (Total Voltage: 12.8V (nominal))
7s 24V Li-ion Battery Pack BMS (Total Voltage: 25.9V (nominal)) 8s 24V LiFePO4 Battery Pack BMS (Total Voltage: 25.6V (nominal))
10s 36V Li-ion Battery Pack BMS (Total Voltage: 36V (nominal)) 12s 36V LiFePO4 Battery Pack BMS (Total Voltage: 38.4V (nominal))
13s 48V Li-ion Battery Pack BMS (Total Voltage: 48.1V (nominal)) 15s 48V LiFePO4 Battery Pack BMS (Total Voltage: 48V (nominal)
16s 60V Li-ion Battery Pack BMS (Total Voltage: 57.6V (nominal)) 16s 48V LiFePO4 Battery Pack BMS (Total Voltage: 51.2V (nominal)

By supporting a variety of series and parallel configurations, the Tiny BMS s516 ensures compatibility with numerous battery setups, providing flexibility for different applications from small-scale residential energy storage to large industrial and renewable energy systems.

Key Features for Configurations

  • High-Current Handling: The BMS can manage discharge currents up to 750A peak and sustained currents of 60A, suitable for high-power applications.
  • Cell Balancing: Ensures equal charge levels across all cells in the configuration, with dissipative balancing up to 150 mA.
  • Comprehensive Protection: Provides voltage and current cutoff protection, thermal management, and automatic recovery from faults.

ENEPAQ BMS up to 750A supported Current Ratings:

It is important to note, that ENEPAQ High Power BMS is capable to handle and lower current ratings, please see table below:
Low Power Mid. Power High Power
5A BMS 25A BMS 100A BMS
10A BMS 50A BMS 200A BMS
15A BMS 75A BMS 300A BMS
20A BMS 100A BMS 400A BMS
25A BMS 125A BMS 500A BMS
30A BMS 150A BMS 600A BMS
700A BMS
750A BMS

BMS Firmware Features

Battery Management System the Tiny BMS device provides a feature-rich battery management and protection solution for 4-series cell to 16-series cell battery-pack applications. The Tiny BMS (Battery Management System) device has extended firmware features and capabilities, including:

• Fully integrated battery pack manager and protection;
• Low side protection FET drive;
• Integrated cell balancing;
• Ultra low power mode;
• Full array of programmable protection features: voltage, current, temperature;
• Lifetme statistics data monitor and event recorder;
• Supports two external temperature sensor channels and one dual-range current sensor;
• Connectivity: UART, MODBUS, CAN, Bluetooth and BMS data broadcasting;
• Programmable inputs and outputs;
• User-upgradeable firmware for quick updates, bringing bugfixes, new features and other improvements, such as client-specific functionality.

This chapter in detail covers all aspects of Tiny BMS (Battery Management System) firmware features and capabilities. This documentation is based on firmware version BMS.v2.3.241.bms and later releases. The Tiny BMS (Battery Management System) is being constantly improved and evolved, new features are built on top of the base firmware, but the basic protection concept and logic, described in this document, is still the same in the updates.

Please check the User Manual for more detailed information in Chapter 3

Safety

Safe and Secure Battery Connection

For safe and reliable operation, it’s crucial to follow the correct sequence when connecting the Tiny BMS s516 to your battery pack. Improper connection can damage both the battery and the BMS. For detailed instructions, please refer to the Tiny BMS s516 manual page 12, paragraph 2.3.2., Tiny BMS battery pack connection sequence. This section outlines the step-by-step process for safe battery pack connection.

Key considerations before using Tiny BMS s516:

  • Using Tiny BMS device requires at least basic knowledge in electronics and electrical engineering. Enepaq will not be held responsible for damage to the battery or any consequence, if the Tiny BMS device is used improperly and no warranty is provided in such case..

To ensure the security of you and your surroundings, please read these rules and follow all the guidelines contained installation instructions of our Battery Management System (Tiny BMS):

• DO NOT use the system where it may cause interference (eg. medical equipment);
• DO NOT use the system in an explosive environment;
• The system is NOT resistant to the chemical environment and mechanical stress;
• All electrical equipment MUST be rated for the voltage of the battery and battery management system;
• Use double-insulated tools;
• DO NOT short-circuit the battery or battery management system terminals, this could cause the damage to the product or the personal property;
• DO NOT lay tools or metal parts on top of the batteries or near the battery management system cable lugs;
• Before establishing connections, make sure to verify polarity.

This list is not exhaustive, and it is the responsibility of the system designer / installer to conduct their own failure mode analysis and determine what is required.

Working around batteries is DANGEROUS. Risk associated with improper use of the battery with the Tiny BMS device includes: short-circuit, fire or explosion.

Read the ENTIRE documentation to become familiar with the Tiny BMS device and its features before operating. Failure to operate the product correctly and safely may result in damage to the product, personal property and cause serious injury.

Throughout the literature the term “Note:” will be used to indicate procedures which, if not properly followed, create a possibility of physical property damage.

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