Solution for Voltage Balance Testing of Lithium Battery Packs

I. Industry Background

With the rapid development of new energy vehicles, the safety performance requirements for them are also increasing. 

As an important component of new energy vehicles, the safety of power batteries cannot be ignored. Electric vehicle power batteries 

belong to high-voltage systems. To prevent safety accidents caused by excessive potential differences, standards such as IEC standards

take equipotential bonding as the basic protection for high-voltage systems, which is also often referred to as the potential

equalization requirement.

II. Test Requirements

In GB/T 18384.3-2015, the potential equalization requirement is: 

In GB/T 18384.3-2015, the method for potential equalization testing is: 

III. Solution

The potential balance tester RJ6815D developed by Ruijie Intelligence can meet the test standards required by GB/T 18384.3-2015.

 It can quickly and accurately measure the resistance between two points and upload the data.

Main features of RJ6815D:

•  DC output, current output up to 50A;

• Four-wire compensation test, which can compensate for wire harness and contact resistance;

• Protection function, equipped with both software and hardware protection measures. When in abnormal working conditions

  such as overload and open circuit, it will automatically stop output and issue an alarm signal;

• Utilizes phase-shifted full-bridge soft-switching technology, ensuring stable and reliable output current;

• Standard RS232 communication and PLC remote control port, meeting the requirements for automated data collection and remote control.