IP56 18V 70Ah LiFePO4 Lithium Battery Module, BMS Solution Custom Made

Item

Comments

Battery module

70Ahr or 1344Whr (300PCS O’CELL IFR18650EC-1.4Ah cells in a 6S50P configuration.)

Approx. Dimension

260 mm x 158mm x 246 mm (L*W*H)

Approx. Weight

14.9kg

Nominal voltage

19.2V

Maximum voltage

21.9V

Minimum voltage

15.0V

Nominal load current

100A max. continuous current @ 23° C

Peak load current

200A max for 30 sec @ 23° C

Charge protection

When the Battery modules are charged to full, they will communicate with BMU, and the BMU has the capability to turn off the charger or open the main contactor. The battery module itself does not have any switch to disconnect the charger.

Balancing

The intra-module balancing circuit is used to compensate slight capacity imbalance among the four cell blocks within a battery module.

The inter-module balancing circuit is used to compensate slight capacity imbalance between different battery modules in series connection.

State of Charge (SOC)

Measurement

Individual cell block voltage and charge/discharge current will be used to monitor the state of charge (SOC) of the battery module.  The estimated capacity used for the calculations will be adjusted to meet the capacity of the lowest capacity cell block when the battery system is fully cycled.  The state of charge will be adjusted for normal self discharge of the battery system when the unit is not on charge.    

RS-485 Communication Uplink

RS-485 Communications will be used to communicate with the Battery Management Unit (BMU) or connection to other battery Modules. 

RS-485 Communication Downlink

RS-485 Communication connection from Downstream battery module.

RS-485 insulation voltage rating

1414V , 5000V rms for 1 minute

Status LED

A Dual LED on module to indicate working status. One is green and the other one is red. Blinking of the green LED indicates that the module is working properly. Blinking of the red LED indicates that the module has failure and needs service.

Condition

Leakage current

Shipping mode (Not connected with other battery modules and BMU)

Less than 1.0mA

Working mode (Connected with other battery modules and BMU), charging or driving

Less than 6.0mA

Sleep mode (Cell voltages are below discharge cut-off voltage, or the vehicle is not ignited.)

Less than 700 µA