In the lithium battery production test, self-discharge has always been an important consideration, the traditional test method will use the open circuit voltage test of the battery, by observing the open circuit voltage change with time can calculate the K value of the battery, but this traditional test method needs a long time to stand, so that the open circuit voltage changes sufficiently, so as to judge whether the self-discharge capacity of the product is within the allowable range. Due to the large production capacity of battery manufacturers, this test method will allow the produced batteries to be stored in the warehouse for a long time, resulting in a large amount of money being occupied by storage. It can be seen that quickly identifying whether the self-discharge is qualified has become a top priority for all battery manufacturers.

Ruijie instrument independently developed battery self-discharge current test system, breaking the traditional test method, which by applying a very stable voltage signal to both ends of the battery, the use of voltage signal and battery open circuit voltage difference and test system internal sampling resistance can generate charging current, charging current and battery internal self-discharge current difference will directly affect the battery open circuit voltage, and the change of open circuit voltage further changes the charging current outside the battery, when the charging current and self-discharge current are equal, the whole system reaches a balanced state, The tester continuously monitors the charging current on the internal sampling resistor, and calculates the final self-discharge current value, the current test curve and the final self-discharge current test results and the real-time temperature of the test process can be displayed by the host computer software.

The RJ6962 battery self-discharge current test system can quickly and accurately test the self-discharge current of up to 16 batteries at the same time, and the test time can be as short as 30 minutes.

At the same time, the test mode has two options: approximation mode and normal mode, the test software opens the parameter independent setting function, the user can set the starting measurement value, test mode, temperature compensation parameters, test start and stop, etc. according to the actual battery capacity, the degree of freedom is higher, and even the low-capacity battery test time can be shortened to about 10 minutes by fixing the starting parameters after multiple tests.