A method for simulating a lithium battery to test a lithium battery charging chip
A charging chip and lithium battery technology, which is applied to the components of electrical measuring instruments, measuring electronics, measuring devices, etc., can solve the problems of reduced battery life, long test cycle, unfavorable personal operation, etc., to increase reliability and stability The effect of reducing the cost of testing equipment and reducing the difficulty of testing
Active Publication Date: 2021-04-27
NANJING MICRO ONE ELECTRONICS
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Problems solved by technology
There are mainly two existing test methods for lithium battery charging chips. One is to directly use lithium batteries, but the disadvantages are that the charging time of lithium batteries is long, the test cycle is long, and the test results cannot be obtained quickly. The other is repeated testing of lithium batteries. It will reduce the life of the battery; the other method is a specific test version, which requires a single-chip control circuit to control the voltage configuration network and current configuration network, constant voltage electronic load, reference voltage circuit, isolation channel, etc., and the test system is complex.
like figure 1 In the traditional test method shown, the circuits in the block diagram all need specific equipment to support. After the whole system is built, it is necessary to build an expensive large-scale equipment, which is not conducive to personal operation.
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[0014] figure 2 Among them, the test system circuit includes two voltage sources and one current source. Under the conditions of satisfying the rated voltage and rated current, any voltage source and electronic load on the market can be used as the current source. In the verification of this circuit, ITECH IT6322 three-channel power supply is used, in which channel 1 and channel 2 correspond to the first voltage source and the second voltage source respectively, and the current source uses Chroma 63600-1 electronic load. Wherein the second voltage source supplies power to the lithium battery charging chip under test, that is, provides charging current; the first voltage source and the current source are connected together and connected to the output terminal of the lithium battery charging chip for simulating the charging characteristics of the lithium battery. The whole process simulates the charging current of lithium battery as IBAT, the current provided by the first volta...
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The invention provides a method for simulating a lithium battery to test a lithium battery charging chip. The lithium battery charging chip to be tested and a test system composed of a first and a second voltage source and a current source are set up. The first voltage source and the current source Commonly connected to the output end of the tested lithium battery charging chip, used to simulate the replacement of the lithium battery and to simulate the charging characteristics of the lithium battery at first constant current and then constant voltage, the second voltage source is connected to the input end of the tested lithium battery charging chip, with It is used to supply power to the lithium battery charging chip under test and provide charging current.
Description
technical field [0001] The invention relates to a method for simulating a lithium battery to test a lithium battery charging chip, and belongs to the technical field of lithium battery charging. Background technique [0002] With the widespread use of portable electronic products in all aspects of work and life, the application of lithium batteries is also becoming more and more extensive. There are mainly two existing test methods for lithium battery charging chips. One is to directly use lithium batteries, but the disadvantages are that the charging time of lithium batteries is long, the test cycle is long, and the test results cannot be obtained quickly. The other is repeated testing of lithium batteries. It will reduce the life of the battery; another method is a specific test version, which requires a single-chip microcomputer control circuit to control the voltage configuration network and current configuration network, constant voltage electronic load, reference volta...
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IPC IPC(8): G01R31/385G01R1/28
CPCG01R1/28G01R31/385
Inventor 王海波张洪俞黎敏霞
Owner NANJING MICRO ONE ELECTRONICS