Immersion cooling is becoming one of the most concerned technical directions in the field of battery thermal management.

The immersion cooling battery pack jointly developed by SK On and SK Enmove maintains the constant temperature of the battery by directly circulating insulating fluid within battery pack. Compared with the traditional indirect bottom cooling method, the heat dissipation performance of this solution can be improved by three times, and it can maintain cell performance and service life even in extremely cold or extremely hot external environment..

This technology was initially verified in the field of data centers, but now it is introduced into battery PACK to solve the same engineering problem: when the energy density is getting higher and higher and the charging rate is getting higher and higher, traditional air cooling and liquid cooling schemes are approaching the upper limit of heat dissipation capacity.

For PACK factory, immersion cooling brings not only the improvement of heat dissipation efficiency, but also the rethinking of the whole PACK structure design. The traditional liquid cooling scheme needs to arrange battery pack, pipelines and joints inside the cold plate, occupying precious space. Immersion cooling directly injects insulating fluid into battery pack cavity, and cell is immersed in the fluid. Heat is directly taken away by the fluid, and the structure can be simplified instead. SK On's immersion cooling solution has developed different versions based On two platforms: soft pack CTP and CMP, which means that the same technology can adapt to different cell forms and grouping methods..

Dongguan Juneng New Energy Technology Co., Ltd. has accumulated more than 10 years of design experience in the application of battery pack thermal management, and has adopted the practice of "one scenario and one strategy" in the BMS temperature monitoring strategy, able to design differentiated temperature collection and response solutions for different application scenarios. In PACK in the safety design, the company uses aerogel heat proof mat to release high temperature gas with pressure relief channels to form a multi-layer protection system. The introduction of immersion cooling technology provides a new choice space for the thermal management scheme-fluid cooling can achieve a more uniform temperature distribution at cell levels, and cooperate with the accurate temperature collection of BMS, it is expected to further reduce the temperature difference between cell.

For energy storage equipment manufacturers and industrial equipment manufacturers, when evaluating the thermal management capability of PACK partners, you may wish to pay attention to a specific question: can you under the condition of high rate charging and discharging, how many degrees will the temperature difference between cell be controlled? Suppliers who can give specific figures are usually more trustworthy than those who only say "we have liquid cooling solutions.