Cause analysis and solution of high temperature rise of copper foil soft connection
As for the reasons for the temperature rise of copper foil soft connection, I think we all know that the conductor has resistance, and the current will generate heat to raise the temperature of the product. This is a physical characteristic and cannot be eliminated, but it needs to be controlled within an acceptable range. The heating of copper soft connection will affect the use safety of the battery. If the temperature rise is too high, it will produce a very dangerous situation, so this point is strictly controlled by battery manufacturers. There are two reasons for the high temperature rise of copper foil soft connection: one is the purity of copper material, and the other is the quality control of electroplating. 1. The main problem of the high heating of the copper flexible bar should be the selection of copper substrate, especially the purity of copper material. We think the reason why the temperature rise of that customer is too high may be that there is no qualified copper foil in the selection of copper material. If there are too many impurities in the copper foil, the resistance is large. The greater the resistance, the more heat will be generated, and the whole will exceed the standard. Our supplier's copper foil test report shows that the purity is 99.99 2% The copper foil soft connection will be electroplated, and the conductivity of the electroplated layer will also affect the heating. For products with high temperature rise requirements, we recommend silver plating, but generally nickel plating. The thinner the electrodeposited layer, the smaller the heating will be and the faster the heat dissipation will be.
