Ningbo Cheeven New Materials Technology Co., Ltd.
Ningbo Cheeven New Materials Technology Co., Ltd.

Use of Battery Liquid Cold Plate in Power Battery System

The range of available cooling options for lithium-ion battery systems has been severely limited. Among the more mature cooling options, air cooling has been largely excluded from use in passenger car battery packs except for in conjunction with other heat transfer methods. With the demonstration effect of Tesla, water cooling is no longer a research topic, but a focus of commercialization as soon as possible.

Understanding Battery Cooling Plate

Battery cooling plates seem to have no unified meaning. We describe it as follows for the liquid cooling plate usage scenario of the power lithium-ion battery pack: In the power lithium-ion battery system, excess heat is generated during battery operation. The heat is transmitted to the surface of the aluminum component of the battery or module through direct contact and is ultimately taken away by the cooling liquid flowing through the internal flow channels of the component. This aluminum component is the liquid cooling plate China The processing technology of the battery cooling plate is more complex than that of the air-cooled heat sink, and the reliability requirements for liquid-cooled heat dissipation are higher for the process, so manufacturers with strong technical precipitation can provide reliable technical support.

General Requirements for Battery Cooling Plates

The battery cold plate has a high heat dissipation power and can timely dissipate excess heat generated during the operation of the power lithium-ion battery, preventing excessive temperature rise. The reliability of the battery cooling plate is high. In the environment of road vehicles, vibration, impact, and alternating high and low temperatures are relatively harsh working conditions for most products. The voltage of the power lithium-ion battery can easily reach several hundred volts, and cooling liquid leakage is a serious problem. Even if you use cooling liquid with good insulation performance, when encountering external impurities, the insulation performance will immediately decrease. Therefore, the sealing reliability of the cooling plate is very important.

The heat dissipation design of the EV battery cooling plate is precise, preventing a large temperature difference within the system. This is due to the performance requirements of the lithium-ion battery itself. The performance and aging of the battery are closely related to the operating temperature. A strict weight requirement is imposed on the battery cooling plate, which comes from the pursuit of energy density in lithium-ion battery systems. A cooling system that seriously reduces the energy density of the system is unacceptable to customers and designers.

The liquid cooling system relies on the large heat transfer coefficient of the liquid flow to transfer high heat. This is currently one of the most effective heat dissipation methods, capable of dissipating several hundred to several thousand watts of heat. The manufacturer's standard pipeline liquid cooling plate is in direct contact with the bottom plate of the cooled equipment by placing a cooling liquid pipe, which can reduce the number of heat exchange interfaces between the equipment and the cooling liquid, thereby maintaining the lowest heat resistance and improving performance.