Battery refers to a device that can convert Chemical energy into electrical energy in a cup, tank or other container or part of the space of a composite container containing electrolyte solution and metal electrode to generate current. It can be divided into positive and negative electrodes. With the advancement of technology, batteries generally refer to small devices that can generate electricity. [1] Like solar cells. The performance parameters of batteries mainly include electromotive force, capacity, specific energy, and resistance. By using batteries as an energy source, a current with stable voltage, stable current, long-term stable power supply, and minimal external influence can be obtained. The battery structure is simple, convenient to carry, easy to charge and discharge, and is not affected by external climate and temperature. Its performance is stable and reliable, and it plays a significant role in various aspects of modern social life.

　　There are roughly three internationally accepted methods for treating waste batteries: solidification and deep burial, storage in abandoned mines, and recycling.

　　1. Solidification, deep burial, and storage in abandoned mines

　　For example, a factory in France extracts nickel and cadmium from it, which are then used for steelmaking, while cadmium is reused in the production of batteries. The rest of the waste batteries are generally transported to special toxic and Hazardous waste landfills, but this practice not only costs too much, but also causes waste, because there are still many useful materials that can be used as raw materials.

　　2. Recycling

　　(1) Heat treatment (2) "Wet treatment" (3) Vacuum heat treatment method

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