• Interface Definitions

  

• Battery negative pole

The wire label is B-, and it’s a blue-colored wire. Connect this wire harness to the battery’s negative pole.
When making the connection, be sure to connect B- to the battery’s negative terminal first before inserting the sampling line terminal. (Warning! Always connect B- to the battery’s negative pole first, or it may cause damage to the board).

• Charge and discharge negative pole

The wire label is C-, and it’s a black-colored wire. Designed for the same MOS port, the charge and discharge negative poles share a single port. Connect C- to the negative terminal of both the charger and the load.

• Voltage sampling

Consists of a wire harness for sampling the voltage of 4 series individual cells and the BMS power supply wire harness.
In total, there are 6 wires in the individual cell sampling wire harness and BMS power supply wire harness.

• Wiring Diagram

  

• Protection Board Activation

  It needs to be activated first after Protection Board boot up. There are generally three methods:

  1. Activation through charging with a charger, our protection board has a charging activation function (the charger should be without the communication and voltage detection features).

  2. Activation through the communication interface by short-circuiting on SW and GND pins, for details, please refer to section 13. Interface Definition.

  3. Activation using a Multimeter in the diode mode, connect the red probe to the blue power line B- of the protection board, and the black probe to the black power line C-.