Lithium battery evaluation test project
definition
Fully charged: To meet the manufacturer's specified calculation capacity, the manufacturer's recommended charging conditions (including current, voltage, temperature,
Charge the battery under time, etc.) Moreover, the time requirement of the battery is within one week after charging.
Complete discharge: in the discharge condition recommended by the manufacturer (including current, temperature, etc.), the battery is discharged according to the specified discharge voltage.
Discharge. And the battery time requirement is within one week after discharge.
Just finished battery: The battery requirements are less than one month after production and are less than XX charge and discharge cycles.
Battery cycle: The battery is continuously charged and discharged according to the manufacturer's recommended conditions, and the discharge capacity of the battery has been specified by the manufacturer.
The calculated capacity has dropped by 40% to 60% .
Indoor temperature: In the test, room temperature means 20±
In a simple test environment.
Explosion: An explosion is an internal explosion of the battery or an explosion or damage caused by a crack in the outer casing of the battery.
Fire: A fire is a fire caused by spontaneous combustion or burning inside the battery.
Safety valve operation: Safety valve operation means to exhaust the battery during normal use of the battery (to release the internal pressure of the battery to the outside
Boundary).
Deformation: Deformation refers to the obvious and visible deformation of the battery due to external pressure or internal pressure.
Evaluation test project
( 1 ) Electrical test
Test item charging status battery condition temperature evaluation test method standard
1 . External short circuit fully charged just after the battery is produced
There is no explosion or fire on the road for more than 6 hours.
2 . Forced discharge fully charged just after the production of the normal room temperature according to the manufacturer recommended current forced deep discharge calculation capacity
250% of the amount . * If safety or protection is achieved during the test, the test can be terminated without explosion or fire.
The phenomenon
3 . Continuous charging, complete discharge, just after the normal production of the battery, the normal room temperature is charged according to the manufacturer's recommended method, and the specified electricity
The pressure lasted for 28 days without explosion, no fire, no cracking
4 . Overcharged, fully discharged, just after the normal production of the battery, normal room temperature is charged to the calculated capacity according to the manufacturer's recommended current.
250% . * If the safety or protection function is achieved during the test, the test can be terminated without explosion or fire.
Elephant
5 . High-current charging, complete discharge, just after the normal production of the battery, the normal room temperature is given by the manufacturer's recommended charging current of 3 times.
The battery is charged to more than 100% of the calculated capacity without explosion or fire.
( 2 ) Mechanical performance test
Test item charging status battery condition temperature evaluation test method standard
1 . Vibration fully charged or fully discharged battery freshly produced finished battery vibration normal room temperature in three directions XYZ 90
Up to 100 minutes, the amplitude is
The battery will be charged to the full capacity recommended by the manufacturer. No explosion, no fire, no deformation
2 . Acceleration fully charged or fully discharged. Just after the battery is produced, the normal room temperature is accelerated in time by 3 millimeters.
In seconds, the average acceleration is
Vibration in directions perpendicular to each other. After testing, the fully discharged battery will be charged to the manufacturer's recommended capacity. No explosion, no
Has a fire, no deformation
3 . Drop the battery fully charged or fully discharged just after the normal room temperature from
On the concrete floor. After testing, the fully discharged battery will be charged to the manufacturer's recommended capacity. No explosion, no fire
Phenomenon ( small battery drop test machine BE-F-320S , Bell brand )
4 . The nail is completely charged through the battery. The battery that has just been produced is normal room temperature with a diameter of 2.5 to
The center axis of the pool * puts the nail into the battery for 6h . No explosion, no fire (battery needle test machine
BE-9002 )
5 . Squeeze the battery that has just been fully charged. Normally room temperature. Place the battery between two flat iron plates to make the vertical axis of the battery.
Parallel to the flat iron plate, the pressure applied to the battery is 13kN without explosion or fire (battery extrusion tester,
BE-6045 )
6 . Impact full charge just finished production of the battery at normal room temperature will be a cylindrical wooden rod (diameter is
The top of the pool is perpendicular to the cell's longitudinal axis.
The phenomenon of fire (battery impact testing machine BE-6045 )
7 .
On the mud floor. No explosion, no fire
( 3 ) Environmental performance test
Test item charging status battery condition temperature evaluation test method standard
1 . High temperature storage fully charged just after production of the battery ( a ) at temperature
Placed at temperature
There is no explosion and no fire in the place for 24 hours.
2 . The heat conflict is fully charged. The battery that has just been produced has passed through 10 consecutive cycles in 2 hours.
°C to remove the battery from
Damaged, no deformation
3 . Low-voltage fully charged battery that has just been produced at room temperature. When the battery is placed at an absolute pressure equal to or less than 11.6kpa ,
There was no explosion or fire at 6 hours.
( 3 ) II environmental performance test (illegal behavior)
Test item charging status battery condition temperature evaluation test method standard
4 . The heat is warmed up and fully charged. Just after the finished battery, put the battery into the oven to 5±
°C. Place the battery in the oven for about 60 minutes. No explosion, no fire
5 . Drop into the water, fully charged, just after the battery is produced, immerse the battery in water (room temperature) for 24 hours without explosion.
Fried, no fire phenomenon __
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