电池均衡充电

海

南

大

学

课程设计

蓄电池均衡充电技术研究

Research of Equalizing Charge of Battery Technology

学

院：

机电工程学院

专业年级：

姓

名：

学

号：

指导教师：

卢浩义

2015

年

6

月

15

日

摘

要

摘要：锂离子电池组均衡充电是动力电池使用技术的重要组成部分，均衡

充电技术的应用直接影响电池组的性能与使用寿命。本文分析了均衡充电的原

理及化 学、物理实现方法，结合均衡充电的分类，还介绍了国内外均衡充电的

研究进展，并指出 均衡充电的研究方向目前串联电池组使用中的一个很重要的

问题是循环寿命缩短达不到设 计寿命。在影响电池寿命的因素中，除了电池本

身的物理性能和不正确的充放电制度外， 各单体电池的充放电特性不一致是重

要原因，单

体电池的不一致会造成充放电时电池电量的不平衡，会对那些过充

电或过放电 的电池造成损害，进而影响整个电池组。为了延长电池使用寿命

电

池组的充电模块需具备均衡充电的功能。

关键词：

锂电池，充电实验平台，充电方法，均衡充电模块

2

system

is

developed

to

improve

the

series

battery

pack

s

concerning

their

uniformity

and

charging

protection.

Measures

for

the

implementation

of

battery

equalization

during

charging

and

the

protection

system

are

discussed.

Functions

of

equalization charging and over charging protection are analyzed, and model of control

for

series

battery

pack

s

equalization

charging

is

setup

.Diverting-current

and

feedback bus voltage are measured during experiments on series Li-ion battery pack s

equalization charging. The monitor and control system is used for DC power supply

to monitor and control data acquisition and transmit and inquiry, which is widely used

in field. A problem occurs: the cycle life of series-connected Batteries is shorter than

the

normal

life.

There

are

three

factors

which

can

affect

the

cycle

life,

one

is

the

physical parameter of the battery; the second is the unreasonable charging system; the

third

is

the

different

restored

capacity

in

each

battery,

which

is

harmful

for

those

overcharged

and over discharged batteries.

In order to

extend battery cycle life, the

charging module for the battery must have the ability of charging equalization. This

thesis

proposes

a

non-dissipative

balance

charging

circuit

based

on

buck/boost

converter for a series-connected battery. Each battery in the battery bank is associated

with a buck- boost converter.

Abstract

Keywords

:

Li- ionBattery, Charging Experimental Platform, Charging

Method, Equalization Charging Module

目

录

3

1

绪论< /p>

…………………………………………………………………………

4

2

均衡充 电的目的和意义

……………………………………………………

4

2.1

目 的

………………………………………………………………………

4

2.2

意义

………………………………………………………………………

4

3

均 衡充电的方法

……………………………………………………………

5

3.1

化学均衡法

…………………………………………………………………

< br>5-7

3.1.1