Lithium battery power battery pack temperature test anti-interference thermocouple

In recent years, with the rise of new energy vehicles, the global lithium battery industry and battery pack industry have developed rapidly. However, due to the wide range of ambient temperatures for new energy vehicles (it may be -50℃ in Mohe or +70℃ in desert areas), coupled with the different driving habits of different drivers, high requirements are placed on the durability and extreme performance of battery packs. Commonly used extreme tests include: thermal shock, battery overcharge, short circuit, impact, vibration, forced discharge, etc. In these tests, temperature is often one of the core experimental parameters.

The special characteristics of power battery pack testing have put forward some new requirements for traditional temperature sensors - thermocouples:

1. High integration leads to small space, requiring thermocouples to be small

2. The change of internal current of the battery pack may cause electromagnetic interference, resulting in temperature curve fluctuations

3. High voltage and high current lead to considerable requirements for insulation performance

4. The extreme temperature is high. In the extreme cases of overcharging and short circuit, the temperature may soar to 800~900℃

5. The ambient temperature may be as low as -50℃~-70℃

These have brought new challenges to the traditional thermocouple industry.

According to these special characteristics of power battery packs, we have designed the PA0210 series temperature measuring line with strong anti-interference ability, which can be used to measure the temperature of the external area of ​​the power battery pack. With our SA1 series patch thermocouples, it can smoothly monitor the external temperature (used in the temperature range of -80~+250℃).

As for the internal temperature test of the battery pack, the highly anti-interference armored thermocouple launched by our company has extraordinary performance. The newly designed shell grounding design can effectively reduce electromagnetic interference. At the same time, because of the grounding design, it is possible to let the current go to the bottom when a short circuit occurs and a large current occurs, thus protecting the expensive instrument.