source:other news
release time:2022-11-10
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(1) The tests conducted by the battery manufacturer to test the quality of lithium battery pack include: capacity division test, charging test, discharge test, short circuit test, internal resistance test, voltage test, resistance test, over-current protection test, complete machine test, etc. The partial capacity test takes 0.2C, 0.5c, 1C as the standard, and carries out routine and rapid charge discharge tests respectively. It is very important to activate the lithium battery pack and judge its capacity and performance. Charging and discharging test The charging and discharging test is to judge whether the charging and discharging circuit of lithium battery works normally. This test has certain requirements for charging voltage and current. Overcurrent protection test After the lithium battery pack is fully charged, use an adjustable resistor to adjust the discharge current to gradually increase the current. When the discharge current is greater than a certain voltage value, the discharge circuit current will be disconnected and become zero. The current recorded before current disconnection is the overcurrent protection current.
(2) Users can test the internal resistance and discharge current of the battery by testing the quality of the lithium battery. If relevant tools are available, internal resistance and maximum discharge current can be tested. The lithium battery with good quality has small internal resistance and large maximum discharge current. Use a 20A multimeter to directly short-circuit the two electrodes of the lithium battery. The current should generally be about 10A or even higher, and can be maintained for a period of time. A good lithium battery pack is relatively stable. Look at the plump appearance. For example, a lithium battery pack of about 2000mAh is relatively large. Fine workmanship or packaging looks plump.
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