The power battery nail penetration and squeezing combined test machine is suitable for simulating the battery pack and system used in electric vehicles during transportation, storage and use, and the battery is subjected to extrusion and acupuncture to test its safety. The acupuncture test should be carried out at an ambient temperature of 20°C ± 5°C. Place the battery connected to the thermocouple (the contact of the thermocouple is fixed on the large surface of the battery) in a fume hood, and use a non-corrosive diameter 6-10mm stainless steel needle to pierce the geometric center position of the largest surface of the battery at a speed of 10mm/s~40mm/s, keep the set time and observe the test results, the battery is qualified if it does not explode or catch fire.