Battery: refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or composite container containing an electrolyte solution and metal electrodes to generate electric 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. Like solar cells. In order to ensure the safety of lithium-ion batteries, domestic and foreign organizations have developed various safety testing standards for lithium-ion batteries. General testing standards generally classify safety testing items into the following four categories: 1. Electrical testing: overcharging, over discharge, external short circuit, forced discharge, etc. 2. Mechanical testing: squeezing, needling, impact, vibration, drop, etc. 3. Thermal testing: High and low temperature cycling, combustion, microwave heating, etc. 4. Environmental simulation: high-altitude low-pressure simulation, salt spray test, etc&Nbsp; Parameter characteristics: The performance parameters of the battery 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