What is the new energy vehicle BMS battery wiring harness?

What is new energy BMS? BMS is a power battery management system, its main role is to monitor and manage the battery, through a specific algorithm on the voltage, current, temperature, and SOC parameters such as acquisition and calculation, and then control the entire charging and discharging process of the battery, play a role in protection, is an effective way to improve the overall performance of the battery management system. It is a management system that can effectively improve the comprehensive performance of the battery.

New Energy Vehicle BMS Battery Harness
New Energy Vehicle BMS Battery Wiring Harness

The BMS battery management system on new energy vehicles is an important link between the on-board power battery and the electric vehicle, and plays a role in monitoring the temperature, voltage, and vehicle voltage of the battery cell, and will automatically alarm when the voltage of each section exceeds 4.2V, and then notify the BMS to automatically cut off the motor electric control and stop working.

What is the new energy harness BMS battery harness?

The BMS battery wiring harness is an important part of the new energy battery pack BMS system, is the carrier of signal transmission between the various components of the system, responsible for the voltage and temperature signals of the various battery modules are transmitted to the BMS system in real-time, it is one of the most important parts in the signal transmission of the battery BMS system.

Considering the complexity of the battery pack environment, the BMS battery wiring harness needs stable signal transmission, which has high requirements for its high-temperature resistance, high-pressure resistance, zigzag resistance, and flexibility.

In new energy vehicles, the BMS realizes the management of electric cells, as well as the communication and information exchange with the whole vehicle.

BMS is located in the car electromagnetic environment is more complex, in the car high-power equipment work, will produce strong electromagnetic interference, which will affect the normal work of the BMS, which requires new energy vehicles BMS wiring harness with anti-electromagnetic interference characteristics, to accurately collect battery voltage, current and other data.

New energy vehicle wiring harness BMS battery harness role

As mentioned earlier, the BMS battery pack wiring harness needs stable and reliable signal transmission, and plays an important role in the whole battery management system, so what are its specific roles and effects? Let’s come together to understand.

1, Protect the battery cell connecting wires and the battery pack from being jeopardized;

2, so that the battery is in the appropriate voltage connection line and temperature range of operation, to meet the needs of the whole vehicle;

3, battery parameter detection: including total voltage, total current, single voltage detection, temperature detection, insulation detection, collision detection, impedance detection, and so on;

4, battery condition monitoring: including connection line SOC, high-speed connection line SOH, terminal connection line SOF;

5, online diagnosis: including sensor problems, network problems, battery problems, battery overcharge, over-discharge, overcurrent, insulation problems connecting lines, and so on;

6, maintain battery safety, and play a warning role: including temperature control system and high-voltage control, once the monitoring the fault, the BMS battery wiring harness will be transmitted to the vehicle controller and charger information to ensure battery safety, including leakage maintenance and so on;

7, charging control: including BMS slow charging and fast charging control;

8, BMS battery harness collects single-voltage information, the choice of equalization methods to achieve commonality of batteries, and battery equalization methods, including dissipative and non-dissipative.BMS battery harness has high requirements for the design of the wiring harness structure, especially the terminal crimping directly affects the electrical performance.


The wiring harness for the BMS battery in new energy vehicles is a crucial component that connects the battery pack to the vehicle. The harness monitors and transmits battery data, thereby facilitating battery protection, management, and safety control, ensuring the smooth operation of the battery system.

You may also want to know: about the knowledge of the energy storage wiring harness, If you have any questions or needs about the BMS battery wiring harness for new energy vehicles, please feel free to contact us, we will be very happy to help and advise you.