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Equalizing circuit for battery management system of electric automobile

A technology of battery management system and equalizing circuit, which is applied in the direction of electric vehicles, battery circuit devices, circuit devices, etc., can solve the problems of incomplete detection, misjudgment, and reduction of components, etc., and achieve the effect of intuitive judgment and convenient detection

Inactive Publication Date: 2012-07-18
HUATING HEFEI POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following defects: 1. Incomplete detection
If you want to reduce the discreteness of components and use higher-level components, the system cost will be greatly increased
2. Misjudgment
There is usually large electromagnetic interference in electric vehicles, and the software cannot distinguish between normal signals and interference pulses. Therefore, in the case of large currents (usually rapid acceleration or rapid deceleration), misjudgment may occur, which is about to judge the balanced channel that is working normally. for failure

Method used

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  • Equalizing circuit for battery management system of electric automobile
  • Equalizing circuit for battery management system of electric automobile

Examples

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Embodiment Construction

[0012] see figure 1 , An equalizing circuit of an electric vehicle battery management system, the equalizing circuit 1 is connected in parallel to the rechargeable single battery 3, the equalizing circuit 1 is connected in series with an LED lamp bead 2, and the LED lamp bead 2 detects the open and closed state through a photodetector 4.

[0013] The detection of the equalization circuit of the electric vehicle battery pack includes the following steps:

[0014] 1. Turn off all the equalization circuits first, and the photodetector will detect whether there is an LED lit; if there is a LED of a certain equalization circuit, it means that the equalization circuit is faulty, and if no LED is lit, then temporarily judge all the equalization circuits Operating normally;

[0015] 2. Turn on the first equalization circuit and turn off all other equalization circuits at the same time. The photodetector detects whether there is an LED lit; if the LED of the first equalization circuit is not...

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Abstract

The invention discloses an equalizing circuit of for a battery management system of an electric automobile. The equalizing circuit is connected with an induction lamp in series. According to the equalizing circuit disclosed by the invention, the induction lamp and a light sensing circuit are connected in series on the equalizing circuit, and the operation state of the equalizing circuit can be judged by detecting whether a light-emitting diode (LED) is on or not by a photo-detector, so that the automation can be realized.

Description

[0001] Technical field [0002] The invention relates to the field of electric vehicle battery packs, in particular to an equalizing circuit of an electric vehicle battery management system. Background technique [0003] The battery pack of an electric vehicle is composed of multiple rechargeable single cells connected in series. Due to the limitation of process conditions, there are certain differences between the single cells. After many charge and discharge cycles , There will be an imbalance between the single cells, which reduces the total effective capacity of the battery pack in series, and affects the performance and life of the battery pack. Therefore, it is necessary to balance the single cells through a balancing circuit to ensure the capacity and life of the battery pack. Existing detection methods for equalizing circuits usually use software for detection. This method has the following defects: 1. Incomplete testing. Due to the discreteness of components, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 劳力王扬周鹏
Owner HUATING HEFEI POWER TECH