Accumulator monitoring equipment and method thereof

Abstract

An accumulator monitoring device comprises an excitation source comprising a waveform generator and a voltage control circuit which are serially connected to provide a constant current source; a gate unit with an input end and an output end, while the input end is connected with the output end of the excitation source for receiving excitation signal and the gate unit is used for outputting the excitation signal to an excited accumulator monomer or an accumulator group. The invention further comprises an accumulation monitoring method, comprising: (a) outputting an excitation signal; (b) gating the circuit between the excitation signal and the object accumulator monomer or accumulator group; (c) outputting the voltages at two ends of the excited accumulator monomer or accumulator group. The invention adopts an accumulator monitoring device formed by a waveform generator and a voltage control circuit, to control the cost and volume of the whole device, and the invention can avoid non-uniform measurement on measurement parameters via using single waveform generator and voltage control circuit, thereby realizing good effect.

Description

technical field [0001] The invention relates to a storage battery monitoring device and method. Background technique [0002] Batteries are increasingly used in electric vehicles and hybrid vehicles. The storage battery system generally adopts the way of series connection. The state deterioration of some single batteries in the battery pack directly affects the overall capacity state of the battery pack, that is, the overall capacity state of the battery pack is determined by the capacity of one or several batteries in the most severely degraded state in the system. Therefore, accurate measurement of the state of individual cells is necessary to prevent battery pack failure. [0003] Chinese patent application CN1975444A discloses a battery internal resistance monitoring method and system, the technical solution disclosed in the patent application adopts such figure 1 With the structure shown, the operation is as follows: Segment the battery group, where the battery group...

AI Technical Summary

Problems solved by technology

This will result in more segments, and more waveform generators and voltage control circuits will be required, which will increase the cost and volume of the system, which will increase the burden on the cost and location of the device.

Moreover, the performance of multiple waveform generators and voltage control circuits may not be consistent, and there are deviations in the data measured by each waveform generator and voltage control circuit.

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