Detection method of composite electrode state
A composite electrode and detection method technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of complex physical and chemical analysis methods, difficulty in realizing continuous detection of battery performance, and large amount of manual participation, so as to achieve less manual participation , Realize the effects of automatic detection, strong operability and practicality
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[0038] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.
[0039] First, according to the electrochemical model of lithium-ion batteries, the relationship between the internal parameters and external characteristics of the composite electrode is simplified: the electricity released by the composite electrode is jointly borne by the active materials contained in it:
[0040] Cap = Cap 1 +Cap 2
[0041] Therefore, in the whole working range, the electricity released by the composite electrode has the following relationship:
[0042] cap a = Cap 1,a +Cap 2,a
[0043] According to the conservation of charge, the charge released by the active material is equal to the amount of lithium it deintercalates:
[0044]
[0045]
[0046]
[0047]
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