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Li-ion Molicel INR21700-P42A 4200mAh Module for Battery Pack, 21700 cell Battery Pack, Formula SAE Electric Battery, Battery for AGV and AMR robots

Molicel P42A 21700 Li-ion Battery Module

Battery module from 1s1p to 1s10p with 21700 size cells.

Key Features of Molicel P42A 21700 Li-ion Battery Module:

  • UN38.3 certified
  • Small size: 229-369 Wh per liter
  • Low weight: 159-204 Wh per kg
  • Individually fuse-protected cells
  • Ultra-low and equal self-discharge
  • Convenient thermal control
  • Built-in temperature sensors
  • UL94-V0 rated, fire-retardant plastics
Li1x_p and Li2x_p Li-ion Battery Module Explanation Scheme
SKU: Molicel P42A Category: Tags: , , , , , ,

Description

Enepaq’s New Molicel P42A 21700 Battery Modules

Enepaq’s innovative new battery modules, built with high-performance Molicel P42A 21700 cells, offer the perfect combination of lightweight design, high power output, exceptional quality, built-in safety features, and ease of use.

Enepaq Battery Modules blend the latest battery technology with safety and ease of use. Each module contains several 3.6V 21700 Li-ion cells connected in parallel. Multiple blocks can be connected in parallel and series to form high voltage Battery Packs of various shapes and sizes.

Enepaq Molicel P42A 21700 Battery Modules: Engineered for Efficiency

While cylindrical cells offer superior quality and safety, Enepaq recognizes the challenges they pose for large battery pack assembly. That’s why Enepaq battery modules are specifically designed to address these issues:

  • Modular Design: Enepaq modules integrate cylindrical cells within a pre-engineered format, eliminating the need for custom trays and simplifying battery pack design.
  • Simplified Connections: Enepaq modules are specifically designed for easy connections. No engineering expertise is required! Simply assemble them using busbars and bolt kits – no welding or additional wiring necessary.
  • Scalable and Efficient Assembly: Enepaq modules allow for faster and more efficient assembly of large battery packs due to their pre-configured format and simplified connections.
  • Specific design based on air cooling: Enepaq battery modules utilize strategically placed air gaps within the housing to facilitate superior thermal management. This innovative design leverages air circulation to effectively dissipate heat generated by the battery cells, maintaining optimal operating temperatures for the entire pack.
  • Integrated temperature sensors: Enepaq modules are with JST 2 pin-XH connection on each module (you can connect the modules with the custom-made device, that can read module temp data and provide it to your BMS unit)
  • Fuse Control: Protects cells from overload and potential fire.

By incorporating high-quality cylindrical cells within a well-designed module, Enepaq offers a solution that leverages the benefits of cylindrical cells while mitigating the challenges associated with their integration.

Key Features of Molicel P42A 21700 modules:

  • Small size: 229-369 Wh per liter
  • Low weight: 159-204 Wh per kg
  • Individually fuse-protected cells
  • Ultra-low and equal self-discharge
  • Rapid prototyping of battery packs
  • Convenient thermal control
  • Built-in temperature sensors
  • UL94-V0 rated, fire-retardant plastics
  • UN38.3 certified

Customization Options:

  • Cell count up to 10 per row
  • Optional multi-point temperature sensor
  • Various 21700 cell models available

Enepaq Battery Module: Advanced Temperature Monitoring System

Ensuring Battery Safety and Performance

Enepaq battery modules feature a built-in temperature sensor system that surpasses the safety requirements of FSAE (Formula Electric SAE) 2017 regulations. This innovative system provides several key benefits:

  • Comprehensive Cell Monitoring: Each module sensor is in direct contact with the negative pole of two adjacent cells, enabling 100% cell temperature monitoring (exceeding the FSAE minimum requirement of 30%).
  • Fast Response Time: The physical contact ensures a rapid response to temperature changes, allowing for quick detection of potential thermal issues.
  • Cost-Effective Solution: This ingenious design offers complete cell monitoring at a competitive price point.
  • Hotspot Detection: An innovative analog signal OR’ing technique combines all sensor signals into a single two-wire acquisition system. This system functions as a hotspot detector, reporting only the maximum temperature within the module.
  • Normal Operation Monitoring: When the battery operates within safe limits, all sensors register similar temperatures, providing an accurate representation of the overall module temperature.
  • Simplified Integration: The sensor functions as a temperature-dependent voltage shunt reference, similar to a zener diode. It requires a simple 680Ω pull-up resistor for operation at cell voltage level. The module can even power the sensor for your convenience.

Superior Safety and Performance:

Enepaq’s advanced temperature monitoring system offers peace of mind by ensuring the safety and optimal performance of your battery pack. This comprehensive and efficient solution allows for early detection of thermal issues and helps prevent potential failures.

Quality

With a long history and well-established manufacturing techniques, these cells boast very high quality and an incredibly low failure rate of only 0.01 per million, crucial when building a battery pack from thousands of cells. The stable manufacturing process ensures high tolerances and low parameter deviation. Typically, cells show less than 3mV of voltage difference even after years in storage, requiring minimal maintenance and balancing. This allows the use of cost-effective and reliable battery management systems with low balancing current. All Battery Modules are perfectly balanced upon delivery, unlike poor-quality cells that may require weeks or months for initial balancing and special equipment for conditioning.

Flexibility

These building blocks enable quick and easy battery pack configuration. Modules can be connected in series and parallel using bolt connections, allowing even MWh-scale batteries to be assembled with ease.

Applications

  • Battery Pack for Electric Formula SAE Student
  • Battery Pack for Performance electric vehicles
  • Battery for AGV and AMR Robots
  • Specifically for Drones (Unmanned Aerial Vehicles), Unmanned Vehicles, Unmanned Underwater Vehicle, Unmanned Ground Vehicles Autonomous Systems (UAVs, UGVs, AUVs) and robotic applications.
  • Battery Pack for Electric Bikes
  • Battery Pack for Electric Bicycles
  • Li-Ion Electric Scooters Battery Pack
  • Special purpose machines
  • High power Golf Carts Battery Pack
  • High power Go Carts Li-Ion Battery Pack
  • Li-Ion Backup energy storage Battery Pack

Additional Notes: This product is made to order, non-cancelable, and non-returnable (NCNR). Once an order is placed with the factory, no changes can be made.

Want to see Enepaq Battery Modules in action? Check out a fun and informative YouTube video featuring Hacksmith Industries!

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Downloads

Molicel P42A 21700 Li-ion Battery Module With Temperature Sensor Datasheet

 

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Product Characteristics

Molicel P42A 21700 Li-ion Battery Module Product Characteristics and Dimensions 

Battery Module / Pack name Battery voltage (V) Battery capacity (Ah) Battery capacity (Wh) Fast charge current (A) Discharge current (A)*1 Initial internal impedance (mΩ)*2
Min. Typ. Max.
Molicel P42A 21700 Li-ion 1s1p battery pack 2.5 3.6 4.2 4.2 15.1 8.4 45 10.9
Molicel P42A 21700 Li-ion 1s2p battery pack 2.5 3.6 4.2 8.4 30.2 16.8 90 5.3
Molicel P42A 21700 Li-ion 1s3p battery pack 2.5 3.6 4.2 12.6 45.4 25.2 135 3.5
Molicel P42A 21700 Li-ion 1s4p battery pack 2.5 3.6 4.2 16.8 60.5 33.6 180 2.7
Molicel P42A 21700 Li-ion 1s5p battery pack 2.5 3.6 4.2 21 75.6 42 225 2.2
Molicel P42A 21700 Li-ion 1s6p battery pack 2.5 3.6 4.2 25.2 90.7 50.4 270 1.8
Molicel P42A 21700 Li-ion 1s7p battery pack 2.5 3.6 4.2 29.4 105.8 58.8 315 1.6
Molicel P42A 21700 Li-ion 1s8p battery pack 2.5 3.6 4.2 33.6 121 67.2 360 1.4
Molicel P42A 21700 Li-ion 1s9p battery pack 2.5 3.6 4.2 37.8 136.1 75.6 405 1.2
Molicel P42A 21700 Li-ion 1s10p battery pack 2.5 3.6 4.2 42 151.2 84 450 1.1

Dimensions 

Li-ion Molicel INR21700-P42A 4200mAh Battery Pack, 21700 cell battery module Dimensions and Weight for battery pack, formula SAE electric, Battery for AGV and AMR robots

Battery Module / Pack name L (mm) ±0.3 Weight* (g)
Molicel P42A 21700 Li-ion 1s1p battery pack 37.2 95
Molicel P42A 21700 Li-ion 1s2p battery pack 58.70 167.00
Molicel P42A 21700 Li-ion 1s3p battery pack 80.20 239.00
Molicel P42A 21700 Li-ion 1s4p battery pack 101.70 311.00
Molicel P42A 21700 Li-ion 1s5p battery pack 123.20 383.00
Molicel P42A 21700 Li-ion 1s6p battery pack 144.70 455.00
Molicel P42A 21700 Li-ion 1s7p battery pack 166.20 527.00
Molicel P42A 21700 Li-ion 1s8p battery pack 187.70 599.00
Molicel P42A 21700 Li-ion 1s9p battery pack 209.20 671.00
Molicel P42A 21700 Li-ion 1s10p battery pack 230.00 743.00

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Temperature Sensor

Technical Details:

  • Sensor Type: Temperature-variable voltage shunt reference
  • Signal Output: Non-linear (internally compensated for -40°C to +120°C operating range)
  • Conversion Values: Provided in Table 2 for easy reference (refer to datasheet)
  • Additional Calculations: Linear interpolation can be used for further value determination

Li-ion Molicel INR21700-P42A 4200mAh Module Temperature Sensors Placement for Battery Pack, 21700 cell Battery Pack, Formula SAE Electric Battery, Battery for AGV and AMR robots

Enepaq battery modules integrated temperature sensor is designed to be galvanically isolated from cell terminals, ensuring safe signal reading with a separate circuit. However, for convenience, a standard stack measurement IC, typically used for battery monitoring and balancing, can be employed. An example circuit utilizing the widely available LTC6803 IC is shown in Figure 6 (refer to datasheet).

Measurement Process

To measure temperature:

  1. Activate Balancing Switch: The balancing switch on the IC is activated.
  2. Voltage Difference: The voltage difference between Cn+1 and Cn represents the temperature.
  3. Current Flow: During measurement, the sensor current flows from the cell positive tab through a series resistor to the sensor, then to the internal balancing FET of the IC, and finally to the cell negative via another series resistor.
  4. Resistor Configuration: Two 330Ω resistors form a total of 680Ω resistance for the sensor.

Important Considerations

  • Cell Voltage Measurement: When the switch is disabled, the cell voltage can be measured.
  • Capacitor Addition: Exercise caution when adding capacitors for filtered measurement to avoid overcurrent conditions in the sensor.
  • Balancing Switches: Adjacent balancing switches must not be enabled simultaneously to prevent overcurrent conditions.
  • Measurement Cycles: If using this technique, conduct measurements in two cycles, alternating cells (e.g., cells 1, 3, and 5 in one cycle, then cells 2, 4, and 6 in the next).

Recommendations

  • Separate ICs: It is recommended to use separate ICs for battery management and temperature measurement.
  • Single IC Use: With careful engineering, a single IC can be used for cell voltage measurement, temperature measurement, and balancing. This can be achieved by bleeding the cells during temperature measurement, provided an additional bleed resistor and MOSFET are added.

By following these guidelines, the temperature sensor can be effectively integrated into the battery management system, ensuring accurate and reliable temperature monitoring.

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3D Model

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VIDEOS

(from 1:10 and 5:55 min about our batteries)

 

(from 4:20 min about our batteries)

 

(from 5:25 min about our batteries)

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Terms of Usage

1. Storage Conditions

The module should be stored within the specified temperature range to maintain its performance:

  • Temperature: 0 ∼ 23℃
  • Humidity: Below 65%
  • Environment: No dust or corrosive gas

Failure to adhere to these conditions may result in performance loss, leakage, and/or rust.

2. Long-Term Storage

2.1 Voltage Requirements

For long-term storage (not exceeding the warranty period), the module should be stored at shipping voltage. Storing the module with a higher voltage can lead to significant performance loss.

2.2 Disconnection

Ensure all devices or components connected to the module clamps are disconnected to prevent current leakage.

2.3 Liability

Enepaq is not liable for any defects occurring after the warranty period, even if the module is stored according to the above guidelines.

3. Warranty

Enepaq warrants that the module will be free from manufacturing defects for 12 months from the shipping date (“Warranty Period”). In case of defects, Enepaq will replace the affected modules. However, the warranty does not cover:

3.1 Inspection Requirement

The buyer must inspect the goods immediately upon receipt. Any quality issues or discrepancies must be reported in writing within 7 days of receipt. Concealed defects must be reported within the warranty term but within 7 days of discovery.

3.2 Improper Handling

The warranty is void if the module has been improperly installed, repaired, altered, or modified (except by Enepaq).

3.3 Misuse

Misuse, abuse, negligence, or accidents void the warranty.

3.4 Non-compliant Use

Using, handling, storing, selling, or distributing the module contrary to the provided instructions voids the warranty.

4. Application

4.1 Aircraft Use

The products are not certified for use in any type of aircraft (including drones, planes, or any flying mechanisms). Enepaq is not liable for any damage if the modules are used in such applications. The buyer assumes all risks.

4.2 Misguided Use

Enepaq does not indemnify the buyer for any loss or expenses caused by the misguided use of products.

5. Usage

5.1 Buyer Responsibility

The buyer is solely responsible for the installation, storage, operation, and maintenance of the goods. The buyer must ensure that the personnel handling the goods are appropriately qualified. Installation, storage, operation, maintenance, and training are conducted at the buyer’s own risk and expense.

5.2 Seller Liability

The seller is not liable for defects or inconsistencies occurring after the transfer of goods due to the buyer’s or their staff’s failure to ensure proper installation, storage, and operation within specified limits, or due to third-party fault, force majeure, or similar circumstances.

Additional Notes

This product is made to order, non-cancelable, and non-returnable (NCNR). Once the order is placed with the factory, no changes can be made.

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