26650 lithium battery safety performance.best batteries for solar power storage

　　Overcharge

　　After the battery standard is charged, the initial state of the battery is measured. When the battery state is normal, it is charged to 10.0V at 3C current, and then converted to the constant voltage charging until the current is 0.01C. Observe the appearance of the battery.

　　Result: Can't afford fire, don't explode

　　Excessive performance

　　After the battery standard is charged, the initial state of the battery is measured. When the battery status is normal, it is discharged to 0 V with 0.5C. Observe the changes in the battery.

　　Result: Can't afford fire, don't explode

　　External short circuit

　　After the battery standard is charged, the initial state of the battery is measured, and the positive and negative electrode is directly short -circuited in the explosion -proof cover (the total line resistance is not greater than 50MΩ), and the test ends when the temperature drops to about 10 ° C at a peak temperature of about 10 ° C. Observe the temperature and appearance of the battery.

　　Result: Can't afford fire, don't explode

　　Hot abuse

　　Measuring the initial state of the battery, after the battery standard is charged, it is placed in the oven, and the temperature rises to 130 ± 2 ℃ at a rate of (5 ± 2 ℃)/min and insulated for 30 minutes. Observe the changes in the battery.

　　Result: Can't afford fire, don't explode

　　fall

　　After the initial capacity of the battery, after the standard is charged, the initial state of the battery measures the test battery vertically from the height (minimum point) to 1m, and the horizontal direction drops freely to the cement floor, requesting falling twice.

　　Result: Can't afford fire, don't explode

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The entire charging and discharging phase of a lithium battery