• Very low stand-by current: 170uA
• 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: 90A continuous; ±750A with external relay / contactor and current sensor
• Discharge/Regen current: ±125A continuous; ±140A continuous (mounted on cool surface); ±200A peak; ±750A with external relay / contactor and current sensor
• External temperature sensors measurement resolution 0.1⁰C
• Measurements: 113 x 65 x 13.8 mm
• Weight: 0114 kg
• 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
• 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/
• State of Health (SOH) calculations
• Speed sensor input

High-Current Handling: Manage battery packs with discharge currents up to 200A (peak) and sustained currents of 125A, 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.

The Tiny BMS v2.2 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 200A 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 (95x65x10.8 mm and only 114 g) maximizes space efficiency in your application.
• Current Sensor Connection: Simplifies integration with external current sensors.

The Tiny BMS v2.2 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,  state of charge and state of health

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.

Firmware Updates: Keep your BMS up-to-date with the latest firmware.

Overall, the Tiny BMS v2.2 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.

• Battery Lifetime Statistics: The Tiny BMS v2.2 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 v2.2.
• 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.
• State-of-Health (SoH): The Battery Insider software allows for manually setting the estimated remaining health 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 v2.2 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 v2.2, allowing them to optimize protection for their specific battery pack application.

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.

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 BMS models.

Ignition Feature: 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 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 v2.2 interacts with external components and communicates data. This level of control allows for customization based on the specific application of the battery pack.

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.

his Cable Set is Used to Connect the Cells to the Battery Management System – TinyBMS v2.2 High Power

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

• 2-point Temperature Measurement
• Battery Temperature Monitoring via Battery insider v2.5.3.1 (Windows)
• Various Temperature Levels Can Be Set in the Battery Insider
• Sensor type: NTC
• Impedance (at 25°C): 10kΩ
• Cable: JST PH-4
• Weight: 8 g.
• HS code: 9025900000

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.