Lithium-ion battery testing standards
Dec 05, 2023
Lithium batteries are batteries that use lithium metal or lithium alloy as the negative electrode material and use non-aqueous electrolyte solution, so they are also called lithium metal batteries. Unlike other batteries, lithium batteries have high charge density. It has the characteristics of long service life and high product cost. Depending on the structural design and electrode materials, lithium batteries can produce voltages from 5V (equivalent to zinc-carbon or alkaline batteries) to 7V.
Lithium battery testing standards:
1. In terms of discharge function test, the standard is (20 ± 5) ℃ to charge and discharge to the end voltage at the specified charge and discharge rate, and the discharge time shall not be less than the standard value.
2. After the test is completed under the conditions of (55 ± 2) ℃ and (-20 ± 2) ℃ for high temperature and low temperature performance respectively [(-10 ± 2) ℃ for polymer lithium ion batteries], take out the battery and test it at the ambient temperature. After leaving it for 2 hours at (20±5)℃, the appearance of the battery should change invisibly without bursting.
3. The requirement for cycle life is to charge and discharge at 1C** to the end voltage at ambient temperature (20±5)℃, leave it aside for 0.5-1h and then proceed to the next charge and discharge cycle until two consecutive discharge times are below 36 times min, the life is considered to be terminated, and the battery cycle life must be no less than 300 times.
4. Protection against overcharge, over-discharge and short-circuit requires that the battery does not explode, catch fire, smoke or leak in the specified operating environment.
