In order to test whether the performance of the battery to meet the needs of the following specifications of the conventional lithium battery performance test to be introduced:
First, the conventional product testing
Charging: The test system / DC power supply to the battery charge, using 0.2C constant current constant voltage charging until the battery is full;
Discharge: the use of test system / loader on the battery discharge, the use of 0.2C constant current discharge until the battery until the end;
Internal resistance: the use of high-precision internal resistance tester for internal resistance test, must contact the contact is good, can be accurate resistance, the greater the battery capacity, the smaller the internal resistance; anyway, the battery capacity is relatively small, the greater the internal resistance ; And usually the magnification of the battery resistance is too small.
Overcurrent: the use of battery integrated tester, the finished battery test battery protection current, protection board can play a role in excessive current protection.
Short circuit: the use of special tester to test whether the battery short circuit protection, usually a lot of protection board in the case of lack of experience in design or battery capacity larger battery short circuit, the general electronic engineers can basically the factory, so choose a more formal Manufacturers are basically no problem, or simply use the positive and negative direct short circuit, the battery whether there is current output, no current output, disconnect the load, recovery voltage and other normal functions to prove that the battery has short circuit protection.
Capacity: 0.2C battery charge and discharge, the battery capacity to the nominal capacity.
Second, the depth of the test
High temperature: 0.2C constant current constant voltage charging, charging is filled in the thermostat inside, the temperature adjusted to 65 ℃ put aside 4H, the use of 0.2C constant current discharge to the cut-off voltage to see whether the capacity of the nominal capacity of 85 %the above.
Low temperature: 0.2C constant current constant voltage charging, filled with low temperature inside the box, the temperature adjusted to -20 ℃ put aside 4H, the use of 0.2C constant current discharge to the cut-off voltage to see whether the discharge capacity of the nominal capacity of 60 %the above.
Cycle: the use of 0.2C at 25 ℃ charge and discharge 500 times, the capacity is preserved more than 80%.
Drop: the use of standard drop equipment, 6 1 m high drop test whether there is fire and other adverse reactions, the normal is no fire, no explosion, no smoke, no leakage.