What is liquid cooling system for lithium-ion battery?

Lithium-ion battery liquid cooling system is an important part of the battery thermal management system (TMS).
Its core principle is to use antifreeze as a heat transfer medium and achieve battery temperature regulation through water circulation.

The system mainly has the following three functions:

Temperature uniformity function:
The water circulation in the liquid-cooled battery pack can ensure that the temperature of each battery cell is uniform.
During the battery charging and discharging process, the temperature difference between the cells will affect the overall performance of the battery.
Through temperature uniformity control, the battery's endurance can be effectively improved, and the battery can be protected to avoid performance degradation caused by local overheating.

Cooling function:
When the battery is working or fast charging, a lot of heat will be generated. If the heat is not dissipated in time, the battery temperature will continue to rise, affecting its performance and safety.
The lithium-ion battery liquid cooling system can accurately control the battery to work in a suitable temperature range by adjusting the cooling water pump and compressor cooling, effectively suppressing the battery temperature rise and ensuring stable battery operation.

Heating function:
In a low temperature environment, the performance of the battery will drop significantly.
To this end, the lithium-ion battery liquid cooling system can be equipped with a WPTC water heater to heat the battery coolant and increase the battery temperature so that it can work normally in a low-temperature environment, achieve a 1C charge and discharge rate, and extend the battery life.

In addition, in terms of motor electronic control thermal management (ATS), the vehicle controller can adjust the water cooling heat dissipation cycle to ensure that the motor and electronic control work within the appropriate temperature range, and work in conjunction with the lithium-ion battery liquid cooling system to jointly ensure the stable operation of key components of the electric forklift.

Advantages of lithium-ion battery
liquid cooling system on electric forklifts

It uses antifreeze with high specific heat capacity as the heat conduction medium, which can accurately achieve temperature equalization, cooling and heating functions.
Excellent thermal conductivity can quickly take away the heat generated by the battery operation, ensure that the temperature of each battery cell is uniform, and avoid local overheating.
Under complex working conditions, whether it is a high temperature or low temperature environment, the battery can always be in the best working state, greatly improving the efficiency, stability and durability of the battery, extending the battery life, optimizing the forklift endurance performance, and ensuring the efficient and reliable operation of the forklift.