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Electric quantity quick detection system of electric vehicle

A detection system and electric vehicle technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of complex structure of the detection device and accurate detection results

Inactive Publication Date: 2012-06-13
常州永旭车辆配件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of this detection device is complicated, and the detection results are not as accurate as those detected by the internal resistance method.

Method used

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  • Electric quantity quick detection system of electric vehicle
  • Electric quantity quick detection system of electric vehicle

Examples

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Embodiment Construction

[0013] Such as figure 1 The electric vehicle power fast detection system shown includes a battery 2 and a power display device, and the two ends of the series circuit formed by the battery 2 and the constant current source 1 are respectively connected to the collector and the emitter of the triode 3; the triode 3 The base of the single-chip microcomputer 5 is connected to the output terminal of the single-chip microcomputer 5, so that the single-chip microcomputer 5 can control how to detect the power, and the single-chip microcomputer 5 controls the base high-voltage signal to the triode 3 at intervals, so that the triode 3 is turned on, so that the constant current source 1 flows The current through battery 2 is constant. The two ends of described battery 2 are connected with voltmeter 4 in parallel, and one end of described voltmeter 4 is grounded, and the other end is connected with the input terminal of single-chip microcomputer 5 through A / D converter 6, and single-chip ...

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Abstract

The invention relates to an electric quantity detection system of a battery of an electric vehicle, and in particular relates to a system for detecting the electric quantity of the battery of the electric vehicle by adopting an internal resistance method. The system comprises a battery and an electric quantity display device, wherein the battery and a constant current source form two ends of a series circuit and respectively connected with a collector and an emitter of a triode; a base of the triode is connected with the output end of a singlechip; two ends of the battery are connected in parallel with a voltmeter, and the voltmeter is connected with the input end of the singlechip through an A / D (analog-to-digital) converter; and the other output end of the singlechip is connected with the electric quantity display device. After the structure is adopted, a value of the electric quantity of a battery can be quickly detected, and the value of detected electric quantity can be more accurate.

Description

technical field [0001] The invention relates to a battery power detection system for an electric vehicle, in particular to a system for detecting the battery power of an electric vehicle using an internal resistance method. Background technique [0002] The amount of charge of the battery is closely related to the reliability of the entire power supply system. The more remaining battery power, the higher the reliability of the system. The commonly used methods to predict the remaining power of the battery are: density method, open circuit voltage method, discharge method, and internal resistance method. The first three methods have low measurement accuracy and are not suitable for on-line measurement of sealing, and are also difficult in practical application. The internal resistance method has little effect on the battery under test. Since the internal resistance of the battery is quite different when it is fully charged and fully discharged, the internal resistance method...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 张拥军
Owner 常州永旭车辆配件厂
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