Consistency on-line monitoring device and method for motive power battery pack for electric automobile

A technology for power battery packs and electric vehicles. It is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables. It can solve the problems of power battery pack cycle performance attenuation, single battery overdischarge or overcharge, and poor consistency. Achieve the effect of being suitable for popularization, accurate and reliable results, and avoiding high common mode input

Active Publication Date: 2012-09-19
HENAN SUDA ELECTRIC AUTOMOBILE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The car starts and stops frequently during driving and the working conditions are complicated. If the consistency of each single battery is not good, the difference between each single battery will be increased d

Method used

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  • Consistency on-line monitoring device and method for motive power battery pack for electric automobile
  • Consistency on-line monitoring device and method for motive power battery pack for electric automobile
  • Consistency on-line monitoring device and method for motive power battery pack for electric automobile

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Embodiment Construction

[0025] The preferred embodiments of the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the three-way output signal of the single-chip microcomputer U1 is connected to the input terminal of the decoder circuit U5, and the decoder circuit U5 includes eight-way signal output ports B1-B8 connected to the eight-way input of the sequence control circuit, and each input passes through the sequence control circuit The rear output of U6 is two signals of the ground switch signal and the detection switch signal. The sixteen signals output by the sequence control circuit are connected to the input pins of the battery selection circuit U7 corresponding to them one by one, the output pin of U7 is connected to the input end of the signal processing circuit U2, and the output end of the signal processing circuit U2 is connected to the A of the single chip microcomputer. T...

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Abstract

The invention discloses a consistency on-line monitoring device and method for a motive power battery pack for an electric automobile, wherein the consistency on-line monitoring device for the motive power battery pack for the electric automobile comprises a singlechip, a voltage detection circuit, a current detection circuit, a temperature detection circuit and a signal processing circuit; the input end of the voltage detection circuit is connected with the I/O (input/output) port of the singlechip; the output end of the voltage detection circuit is connected with the signal processing circuit; the signal processing circuit is connected with the singlechip; and the current detection circuit and the temperature detection circuit are respectively connected with the singlechip through the signal processing circuit. According to the invention, the value quantization index of the battery pack consistency is obtained through performing data processing on the detected voltage, current and temperature data, the digital quantization of the battery pack consistency index is realized, the measurement is rapid and efficient, and the result is accurate and reliable.

Description

technical field [0001] The invention belongs to the field of electric vehicle application technology, and in particular relates to an on-line monitoring device and method for the consistency of a power battery pack used in an electric vehicle. Background technique [0002] With the aggravation of energy crisis and environmental problems, the research of pure electric vehicles and hybrid electric vehicles has been widely concerned by various countries. The single voltage of the power battery for electric vehicles is generally below 6V. In practical applications, multiple single batteries need to be connected in series to form a battery pack to achieve the required voltage. The car starts and stops frequently during driving and the working conditions are complicated. If the consistency of each single battery is not good, the difference between each single battery will be increased during the charging and discharging process, which may easily cause over-discharge or over-discha...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 李复活续丹吴婧房念兴王国栋
Owner HENAN SUDA ELECTRIC AUTOMOBILE TECH
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