With the development of science and technology, lithium batteries are being used more and more widely in all walks of life, from electronic watches and mobile phones to large laptops and cars. However, in the process of using lithium batteries, we will also encounter some safety hazards, such as: lithium batteries on mobile phones explode, or because we use improper, or the quality of lithium batteries itself is not qualified. Lithium batteries must pass overcharge, short circuit, acupuncture, extrusion, heavy impact and other safety tests. If lithium batteries do not fire or explode, it means that such lithium batteries are qualified products. Otherwise, they are unqualified products. The key is how to detect whether the lithium battery has reached the specified safety index lithium battery manufacturer?
This can be detected in three ways:
Way 1: vigorously extrusion first tested will be fully charged batteries on the tester of the plane, and then use hydraulic cylinder on 13 + 1 kn extrusion, finally by 32 mm diameter steel bar extrusion battery, if the lithium battery can withstand maximum pressure, and there is no an explosion and fire, explain the lithium battery products are qualified.
Way 2: Heavy impact: After the test battery is fully charged, place it on the test plane of the testing machine, place the steel column with a diameter of 15.8mm vertically in the center of the battery, and drop the weight of 9.1kg freely from a height of 610mm onto the steel column above the battery. The battery does not fire, does not explode can lithium battery manufacturer.
Way 3: overcharge test the so-called overcharge test, is actually testing the internal of lithium-ion batteries is stable, the method is very simple, first of all, the battery in 1 c on a full charge, and then carried out in accordance with the 3 c overcharge 10 v overcharge test, when the battery charge voltage rises to a certain voltage stability for a period of time, closer to the time when the battery voltage rise quickly, when rose to a certain extent, top hat pulled batteries, the voltage dropped to 0 v. In this process, the lithium battery does not explode and catch fire, that means the lithium battery is qualified products.
