Button battery is a battery with unique shape and size. The whole shape is like a small button. I don’t know much about safety testing, so let me tell you what aspects of button battery safety testing are roughly divided into.
In fact, the test content of the button battery safety test is similar to other batteries, and the test content includes: vibration, extrusion, acupuncture, overcharge, short circuit, drop, heating, heavy object impact, etc. Next, I will briefly talk about the specific test content of the overcharge test, short circuit test, acupuncture test, extrusion test, and heavy object impact test.
Overcharge test of the button battery: first charge the button battery fully, and then overcharge according to 3c to carry out the overcharge test. If the voltage of the battery rises to a certain level when the battery is overcharged, we first stabilize it for a period of time, and then rapidly increase the voltage of the battery when the time comes. At this time, the voltage of the battery has risen to a certain limit. Pull off the top cap, drop the voltage to ov, and the battery can pass the test without catching fire or exploding.
Short-circuit test of the button battery: After the button battery is fully charged, use a resistance wire to short-circuit the positive and negative poles of the battery.
Acupuncture test of button battery: put the fully charged battery on a flat surface, and use a steel needle with a diameter of 3mm to pierce the battery radially. The test battery can pass the test without igniting or exploding.
Squeeze test of button battery: Put the fully charged battery on a flat surface, apply a certain extrusion force by the hydraulic cylinder, and then squeeze the battery by the steel rod plane, once squeezed, when the pressure reaches the maximum value Stop squeezing, if the battery doesn't catch fire, it doesn't explode.
Button battery heavy object impact test: After the battery is fully charged, place it on a flat surface, and use a steel column to place it vertically in the center of the battery. If a certain weight of weight is freely dropped on the steel column above the battery, if the battery can still Fire, no explosion can pass the test.
Overcharge test, short circuit test, acupuncture test, extrusion test, and heavy object impact test are the test contents of the button battery safety test. If these test items can be carried out meticulously, the quality of the button battery will be greatly improved. This also ensures the normal use of the button battery. Speaking of which, I believe everyone knows it.
