A battery internal resistance measurement method and circuit for a battery pack management system
A technology of battery management system and battery pack management, which is applied in the direction of measuring resistance/reactance/impedance, measuring electricity, measuring devices, etc., and can solve the problems of increasing the number of devices and cost
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[0018] figure 1 It is a schematic diagram of the battery internal resistance measuring and calculating circuit of the battery pack management system according to the embodiment of the present invention. Such as figure 1 As shown, the battery internal resistance measurement circuit of the battery pack management system in this embodiment includes: a battery stack 10 , a central controller 16 of an energy storage system, and at least two battery management systems 13 and 14 . Wherein, the battery stack 10 includes at least two or more sets of energy storage battery groups 11 and 12 connected in series.
[0019] The battery management systems 13, 14 are in one-to-one correspondence with the battery packs 11, 12, and the first period T 1 The voltage of a single battery in the battery pack 11 or the battery pack 12 is collected in real time. The energy storage system central controller 16 collects the current of the negative pole of the battery stack 10 in real time through the ...
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