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

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...

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 during the charging and discharging process, which may easily cause over-discharge or over-discharge of some single batteries. Overcharge, and cause the cycle performance of the power battery pack to decay or fail

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