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A battery balancing circuit and control system

A battery equalization and circuit technology, applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve the problems of complex control circuits, large energy loss, etc., and achieve small size, improved service life, and simple control Effect

Active Publication Date: 2017-03-01
ZHEJIANG NARADA POWER SOURCE CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can achieve balance between high-end and low-end conditions, but the control circuit is relatively complicated, and the charge can only be transferred one by one between adjacent batteries, and the energy loss in the transfer process is large

Method used

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  • A battery balancing circuit and control system
  • A battery balancing circuit and control system
  • A battery balancing circuit and control system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments.

[0020] refer to figure 1 . The equalization circuit of this embodiment includes an external DC power supply, a DC-DC converter, a first switch K1, a second switch K2, branch switches S1, S2, S3, S4, S5, S6 and S7, batteries B1, B2, B3 , B4, B5 and B6. Among them, batteries B1, B2, B3, B4, B5 and B6 form a battery pack. An external DC power source is connected to the DC-DC converter. Output terminals 1 and 2 of the DC-DC converter are current-limited low-voltage output terminals, which are connected to the first switch K1. The first switch K1, the branch switches S1, S2 and the battery B1 are connected in series; the first switch K1, the branch switches S2, S3 and the battery B2 are connected in series; the first switch K1, the branch switches S3, S4 and the battery B3 are connected in series; the first The switch K1, the branch switches S4, S5 and the battery B4 ar...

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Abstract

The invention discloses a battery equalization circuit and a battery equalization control system. The equalization circuit consists of a battery, an external direct current power supply, a DC-DC converter, a first switch, a second switch and multiple branch switches, wherein the first switch and the multiple branch switches are used for controlling equalization of battery cells; the second switch is used for controlling equalization of a battery pack consisting of multiple battery cells; the control system comprises a signal acquisition module, a processor CPU, an isolating circuit and a switching control module. With the adoption of a shunt compensation current method, the battery cells or battery pack can be subjected to independent power supply equalization, and the battery cells and battery pack can also be subjected to power supply equalization simultaneously, so that the capacity of each battery is kept consistent, the short-board effect of a battery string is avoided, and the service life of the battery is prolonged. The battery equalization circuit disclosed by the invention is simple to control, low in cost and small in size.

Description

technical field [0001] The invention relates to a battery balancing circuit and a control system. Background technique [0002] A battery pack is usually composed of several single cells connected in series, and a battery system is usually composed of several battery packs. Due to the differences in the production and use of each battery, it will cause the imbalance of the single battery and the imbalance between the battery packs. This imbalance will lead to overcharge or overdischarge of some single cells, thereby shortening the service life of the battery and accelerating the damage of the entire battery pack. At present, there are two main types of methods to solve the battery balancing problem: [0003] (1) Resistive discharge passive equalization. This equalization method is the simplest and lowest cost equalization method. Connect a switch and a resistor in series and connect them in parallel at both ends of each battery. When equalization is required, turn on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H02J7/00
CPCH01M10/44H02J7/00Y02E60/10
Inventor 陈威毛良平陈建张育红
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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