Behind IMMERSIO™ Battery System
ENHANCED PERFORMANCE FOR ADVANCED APPLICATIONS
Immersion Cooling VS. Indirect Liquid Cooling
The test conducted with the same of cell configuration in two different cooling method samples.
The Thermal Performance test result shows 10-degree delta between immersion cooling and indirect liquid cooling method on cell surface temperature and 20-degree delta on busbar temperature represent the thermal control capability using immersion cooling solution. Immersion-cooled battery pack will have 20 ~ 30% cooler temperature compared to indirect liquid cooled battery pack.
The Heat Up test result shows in cells heating up process, immersion cooling shows an outstanding performance of 2X faster heat-up rate compared to indirect liquid cooling.
The cycle life test using immersion cooling shows a slower cell decaying speed on battery cycle life compared to indirect liquid cool under 2C charge / 4C discharge cycle. According to the test, immersion cooled battery module is reaching over 6,000 times cycle life with SOH: 70%
ENHANCED SAFETY DESIGN FOR ADVANCED APPLICATIONS
Nail Penetration Test
The test conducted with battery module of cylindrical cells configuration, to test the thermal runaway occurred with nail penetration, and fire propagation situation after the cell is damaged.
HOW DOES IMMERSION COOLING
SUPPRESS THERMAL RUNAWAY
When a single cell fails, the material within starts an exothermic (energy-releasing) decomposition reaction, and the rate of decomposition is positively correlated with temperature. In short, as temperature increases, decomposition occurs, further increasing the temperature, which causes further decomposition. This forms a feedback loop that goes on until the temperature reaches a point to rupture the cell and the remaining energy within the cell is released in the form of heat and pressure.
One of the main reasons to design and implement immersion cooling solutions into battery systems is to mitigate thermal runaway within one single cell. The reason behind fire and explosion on battery system is thermal runaway happen on a single cell and causes chain reaction to spread to multiple cells to increase to extremely high temperature and light up everything. When the heat dissipation is big enough to control thermal runaway within one battery cell, there is no chance for chain reaction from happening.