Regarding the problem of battery capacity testing, this paper first analyzes the relationship between battery capacity, internal resistance and temperature, and discusses the principle and application of battery capacity testing based on conductivity. On this basis, a set of intelligent battery capacity testing equipment is studied and developed, and the hardware composition and software design of this battery capacity testing system based on NTEL80C31 and PSD311 are introduced in detail. In particular, the composition of each hardware module such as the signal generation circuit, filter circuit, power amplifier circuit and A/D conversion circuit, as well as the design and process of each software module are described in detail. At the end of the paper, the anti-interference measures of the system in software and hardware are discussed to a certain extent, and some actual measurement results are listed to prove the effectiveness and accuracy of the system test.
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