Different lithium battery constructions require different heat transfer page raw material planning schemes.
New energy power lithium battery packs must work in harsh environments for a long time, which will reduce the lifespan of rechargeable batteries. The uneven distribution of temperature inside the battery box can lead to an imbalance in the characteristics of each charging battery control module. The thermal supervision and management methods of new energy power lithium battery packs immediately affect the performance indicators of assembling a good-looking car, which is crucial for the overall operation of the vehicle!
The thermal intelligent management system for rechargeable batteries is a complete set of system software that ensures the operation of lithium battery packs within a suitable temperature range. The change in temperature inside the rechargeable battery will cause changes in its characteristics. For example, at lower temperatures, the available capacity of the rechargeable battery will significantly decrease, and at temperatures that are too low, there is a high possibility of momentary overcharging of the working voltage, causing the precipitation of lithium battery electrolyte inside the rechargeable battery and leading to short circuit faults.
The thermal intelligent management system must perform heating well when the battery temperature is low, ensuring the effectiveness and safety of charging ultra-low temperature batteries. If the battery temperature rises after long-term operation, it is necessary to use thermal management methods to carry out reasonable evaporator and equalization to prevent the edge overheating of the lithium battery pack from directly affecting its service life and safety.
Different lithium battery constructions require different heat transfer page raw material planning schemes:
1. Soft pack battery pack:
Composed of several soft pack batteries accumulated together, the soft pack batteries are generally protected one by one using aluminum alloy plates internally. Thermal conductive silicone adhesive is used to bond and fix the soft pack batteries to the aluminum alloy. This type of thermal conductive silicone adhesive has excellent adhesion and faster drying ability, which can be integrated into a large number of mechanical automation production and manufacturing work. After drying, it also has excellent heat transfer performance and practical shock absorption effect.
2. Square battery pack:
Composed of several square batteries stacked together, the assembly of square batteries, rechargeable batteries, and the position between the touch panel or touch panel can all be fixed using a thermal conductive silicone adhesive similar to that of soft pack batteries. It is strongly recommended to use thermal conductive silicone sheets and component heat transfer adhesives to fill the gap between the lithium battery pack and the base plate, so that the energy of the lithium battery pack can be reasonably transmitted to the outside, while alleviating vibration and impact, and maintaining the normal operation of the rechargeable battery.
3. Cylindrical battery pack:
Several cylindrical rechargeable batteries, such as the commonly used 18650 rechargeable battery, are fixedly installed in a support frame to form a rechargeable battery control module. A thermal conductive silicone adhesive with both heat transfer and flame retardant properties is used between the rechargeable battery control module and the external fireproof board to ensure stability and sealing. In order to further improve the actual effect of heat conduction and maintain the lithium battery pack, it is necessary to inject a low proportion of heat conductive sealant with good flame retardancy and strong flexibility into the control module of the rechargeable battery.
