With the wide application of thermal conductivity materials in the field of traditional electronic products, such as thermal conductive silicone grease, thermal conductive adhesive, thermal conductive silicone gasket, cooling graphite film and other materials have been familiar with, but for new energy electric vehicles, due to the application process, reliability, cost and other aspects of the factors, its demand is also different from the general electronic products, many traditional thermal conductivity materials is not completely applicable.

And thermal adhesive is currently used in new energy electric vehicles is widely a sealing thermal conductivity material based on silicone system, embodies the form is generally in the form of double components, can be at room temperature by addition curing reaction, form a kind of flexible and elastic and adhesive silicone elastomer, can achieve 2.3~3.2W/m.K thermal conductivity, but also has excellent electrical insulation performance. In the traditional automotive field, thermal conductivity adhesive has been widely used in electronic power modules, high-frequency transformers, connectors, sensors, etc., while providing thermal conductivity, but also with insulation, filling protection and other functions. Compared with the traditional automobile field, in the field of new energy vehicles, the thermal conductivity adhesive is more used for the power battery pack, power conversion and control system, battery management system, vehicle charging system and other components.

Power battery pack application

In the power battery pack, cell in the process of chemical reaction charge and discharging will produce a certain heat, if not timely cooling, cell internal temperature will continue to rise, when more than a certain temperature, the cell internal diaphragm failure, cause short circuit, causing thermal runaway phenomenon, the current new energy electric vehicle battery pack design cooling system, whether air cooling or water cooling system, between the cell and cooling system, can use thermal glue, help better heat conduction between battery and cooling system.

Electric control system application

In the normal working state, the electronic control system itself chip and circuit board, because of the need to participate in a lot of computing and signal control, will also produce a certain amount of heat, this part of the heat, also need to help transfer from the internal to the external, thermal conductivity glue is also a more appropriate choice.

Advantages of thermal conductive adhesive for new energy vehicles:

1.Widespread applicability

With the improvement of the complexity of the design of many electronic devices, compared with the traditional thermal conductive materials, the thermal conductive adhesive can better fill the irregular gap of components and overcome the tolerance of parts. Thermal conductivity adhesive can be designed according to different thermal conductivity according to the needs of different products, and can also be better targeted product development.

2.Suitable for non-scale automatic production

Thermal conductive adhesive can be combined with automatic equipment for rapid glue, to meet the needs of automatic production process in the industrial field. The formulation system can be specially optimized to enable the material to be more easily transported in the dispensing machine and reduce the wear on the dispensing equipment, thus allowing stable and efficient production.

3.Long-term reliability

Thermal conductivity adhesive has shown excellent performance in many tests and practical applications, such as thermal stability, thermal shock resistance, electrical insulation and vibration aging tests. After these tests and practical application process, both the appearance, thermal conductivity, volume resistivity, breakdown strength, mechanical strength and other properties have not been found significant changes, showing excellent reliability.

Post time: Sep-19-2022