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There are two basic processes of internal short circuit of battery caused by metal foreign matters, as shown in Figure 1. In the first case, large metal particles directly pierce the diaphragm, causing a short circuit between the positive and negative electrodes, which is a physical short circuit.

In 1800, Alessandro Volta, an Italian physicist, invented the Volta stack, the first battery in human history. The first battery was made of zinc (anode) and copper (cathode) sheets and paper soaked in salt water (electrolyte), demonstrating the artificial possibility of electricity.

With the popularity of electric vehicles, more and more people begin to pay attention to the battery. The battery is the energy storage warehouse of electric vehicles. Electric vehicles convert electric energy into chemical energy when charging and store it in the battery. When using electric vehicles, the motor converts the chemical energy in the battery into mechanical energy, so that electric vehicles can run on the road. Since the battery is the power source of electric vehicles, What kinds of batteries are currently used in electric vehicles and which battery is better?

Is there any special reason for the use of aluminum foil and copper foil for the current collection of positive and negative electrodes? Is there any problem with using it in reverse?

Explore the comprehensive guide to 60180 40mAh batteries by Dongguan Encore Energy. Covers 2026 EU Passport exemptions, technical specs, and smart lighting integration.