If you have a multimeter, you can test the quality of a lithium-ion battery pack in one minute. The method is to find 3 to 5 1-ohm power resistors connected in series with a power of 10W. After connecting them, connect them in series to measure the discharge current of the battery, usually set to 500mA. If you want to buy a battery, you can connect this load to the positive and negative poles of the battery, and then measure the voltage drop of the battery, That is to say, measure the voltage before connecting the resistor. When measuring the voltage after connecting the load, the smaller the difference between the two voltage values, the larger the battery capacity and the stronger the load carrying capacity.

　　Take a look at its standby time. If the time becomes shorter, it indicates that the lithium-ion battery pack is aging.

　　The lithium-ion battery pack needs to be subjected to high-temperature aging, low-temperature, and temperature cycling in a high-temperature aging room under various temperature conditions and changes. It is integrated with the charging and discharging system to conduct overcharging, discharging, and short circuit tests at various temperatures. It is evaluated that the lithium-ion battery will experience Joule heat accumulation during the testing process, leading to temperature rise of the battery, posing a risk of thermal runaway of the internal materials of the battery. Once the battery experiences thermal runaway and combustion occurs.

　　To ensure the safety of lithium-ion battery packs during various temperature changes and charging and discharging related tests, a remote camera can be installed through the window to monitor the test and detect the surface temperature of each battery. If there is an abnormal temperature rise on the battery surface, it is highly likely to cause danger. The system immediately activates the safety protection mechanism. Assuming that the high-strength inner furnace body can withstand the BZ power during the instantaneous BZ of the battery, The standard explosion-proof hole will also release BZ pressure, and the lithium-ion battery dedicated testing machine will detect a fire and immediately extinguish the fire to cool down. After extinguishing the fire, the organic volatile gases and odorous gases inside the box will be discharged through the exhaust mechanism to ensure the cleanliness of the laboratory. Through multiple international standards and safety tests for lithium-ion batteries, doubts such as BZ combustion can be prevented.

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