Immersion Cooling Battery Pack

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As the core component of electrochemical energy storage, batteries have a greater risk of thermal runaway. When thermal runaway occurs, a large amount of heat will be released instantaneously, which will quickly spread to adjacent batteries, causing large-scale thermal runaway of the battery pack, causing serious fire or explosion. ACCIDENT. From the perspective of safety, it is very important to do a good job in the thermal management of the energy storage system, especially the thermal management of the battery system, to effectively control and solve the fire and explosion risks caused by thermal runaway.

At present, there are mainly two types of battery thermal management technologies in energy storage systems: air cooling or cold plate liquid cooling. Among them, air cooling is to use natural wind pressure or air conditioning system to dissipate heat from the battery. Although the structure is simple and easy to install, the cooling efficiency is not high, the heat dissipation of the battery is uneven, and the temperature difference between the battery packs is large (4°C-8°C). ;Cold plate liquid cooling is to place the cooling plate with circulating cooling liquid under the battery core to cool down the contact parts of the battery core. The cooling liquid does not directly contact the battery core. It is an indirect cooling method, and the cooling speed is slow. , long time and so on. Moreover, the two cooling methods are not capable of directly reducing the temperature of the battery core and reducing the difference in the operating temperature of the battery core.

Immersion cooling battery pack

The energy storage battery is directly immersed in the cooling liquid, the battery cell is in direct contact with the cooling liquid, and is completely isolated from oxygen, so as to realize direct, rapid and sufficient cooling of the battery, ensure that the battery operates within the optimal temperature range, and effectively prolong the battery life. service life, and improve the safety performance of the energy storage power station as a whole.

The immersion liquid cooling is to completely immerse the energy storage battery in the insulating cooling liquid. The battery core is in direct contact with the cooling liquid. The cooling liquid has higher thermal conductivity and specific heat capacity, which can absorb and conduct heat more effectively and faster, improving the The heat dissipation efficiency of the system is improved, and thermal runaway can be actively suppressed at all times. Once the thermal runaway of the battery cell occurs, the phase change of the coolant will take away more heat, quickly reducing the temperature of the thermal runaway battery cell to avoid affecting the adjacent battery cells, and ensuring the overall safety of the energy storage system.

First of all, the solution is committed to preventing thermal runaway of the battery system from the physical source and improving its own safety. It immerses the battery system as a whole in the cooling liquid, realizes the ultra-low temperature difference in the area through liquid circulation, and keeps the working temperature difference of the cells in different areas at ±2°C, reducing the risk of thermal runaway of the cells from the source and prolonging the cycle life of the battery. Secondly, the battery system is completely isolated from the air. In extreme cases, some battery cells are damaged and thermal runaway occurs. The non-flammable flame-retardant coolant can also speed up the circulation to take away local heat, prevent diffusion, and prevent battery clusters from burning and exploding. It will not affect the safety of the system and surrounding environment.

The immersion liquid cooling energy storage system is an advanced battery cooling technology, which is realized by immersing the energy storage battery in a special insulating cooling liquid. With faster cooling speed and shorter cooling time, it will completely solve the safety hazard of the battery cell, greatly improve the cooling efficiency of the battery thermal management system, and effectively improve the consistency of the battery operating temperature.

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