As electric vehicles continue to evolve towards higher power, longer range and faster charging capabilities, battery temperature management has become increasingly important. Excessive temperatures can negatively affect battery efficiency, charging speed, safety and overall lifespan.
 
Therefore, an increasing number of electric vehicle manufacturers are beginning to adopt battery liquid cooling systems as part of their advanced battery thermal management solutions. The battery cooling system, especially the EV battery liquid cooling system plays a crucial role in thermal management.

What Is a Liquid Cooling System for Battery Systems

---

The battery liquid cooling system is a temperature control and heat dissipation solution specifically designed for power batteries. By arranging pipes or cold plates that carry cooling medium between battery modules, the flowing cooling liquid can absorb the excessive heat accumulated during the battery’s operation.
 
In low-temperature environments, the cooling liquid can be heated to pre-heat the battery, helping it maintain a reasonable operating temperature range at all times.
 
Battery Cooling System includes air cooling, liquid cooling, and hybrid cooling solutions, with EV Battery Liquid Cooling System being the most widely used in modern electric vehicles.

Why EV Batteries Need Liquid Cooling

---

The core value of the liquid cooling system for EV batteries testing lies in several key aspects.

EV batteries generate significant heat

During high-speed driving and fast charging, EV batteries generate considerable heat.
If these heat cannot be dissipated in time, it will cause the internal temperature of the battery pack to rise rapidly, significantly shortening the cycle lifespan of the battery.

High temperatures reduce battery lifespan

When the battery operates for a long time in an environment with temperatures exceeding the recommended range, for every 10℃ increase, the rate of capacity degradation will double, and the cycle life will be shortened by nearly half. Excessive temperature will accelerate battery aging and reduce the long-term capacity retention ability.

Fast charging requires efficient thermal control

During the charging process, the charging power can reach several hundred kilowatts. The battery will accumulate a large amount of heat in a short period of time. If the heat cannot be quickly removed from the battery pack, it will not only limit the charging power, prolong the charging waiting time, but also cause irreversible damage to the battery.

How Liquid Cooling Improves EV Battery Performance

---

について liquid cooling system can precisely and efficiently control the temperature, maintaining the battery temperature within the optimal working range throughout the fast charging process.
 
This breaks the limitation of high temperatures on charging power, allowing the vehicle to sustain higher charging power for a long time and reducing the waiting time for fast charging replenishment.
 
At the same time, a stable and reasonable working temperature can also prevent additional battery damage caused by fast charging, while improving the charging efficiency and ensuring the long-term health of the battery.

Main Components of a Battery Liquid Cooling System

---

The battery liquid cooling system is mainly composed of the following components:
 
Cooling plates
Cooling plates absorb heat generated by battery cells.
 
Coolant circulation system
Pumps and pipelines circulate coolant throughout the battery pack.
 
Heat exchangers and chillers
Heat exchangers and industrial chillers remove heat from the coolant.
 
Sensors and control systems
Temperature sensors monitor battery conditions and adjust cooling performance automatically.

Advantages of Liquid Cooling Over Air Cooling

---

The following table contrasts the key differences between the two common cooling methods: liquid cooling and air cooling.

比較項目	液冷システム	Air Cooling System
冷却性能	High efficiency, suitable for high-power batteries	Moderate, limited under high load
Temperature Stability	More stable with smaller fluctuations	Larger temperature fluctuations
Fast Charging Support	Supports high-power fast charging	Prone to overheating during fast charging
Battery Lifespan	Better protection, slows aging	Higher thermal stress
温度均一性	More uniform distribution	Less uniform
エネルギー効率	Higher efficiency	Lower efficiency

Challenges of Battery Liquid Cooling Systems

---

Although liquid cooling has many advantages, the system complexity and maintenance requirements are usually higher than those of air cooling systems.
 
The liquid cooling system requires additional components such as cooling plates, pipelines, and sealing structures, which will increase the overall weight and design complexity of the battery pack and impose higher requirements on the overall vehicle space layout.
 
On the other hand, if the sealing process is flawed, there is a risk of coolant leakage, which may affect the normal operation of the battery circuit, increasing the quality control requirements in the manufacturing process and also pushing up the production cost of the entire vehicle to a certain extent.

結論

---

LNEYA offers advanced liquid cooling and industrial chillers solutions for next-generation battery applications.
 
Whether it’s in the development of electric vehicles or the application of energy storage systems, LNEYA provides バッテリー冷凍機 そして バッテリーパック冷却システム, which can meet the temperature control requirements of batteries of different power levels.