Equably charging system of lithium ion power battery pack

A power battery pack and lithium ion technology, which is applied in the field of lithium ion power battery pack equalization charging system, can solve the problems of complex structure and low reliability of the charging system, and achieve the effects of simple circuit structure, easy charging, and avoiding equalization control.

Inactive Publication Date: 2009-09-09
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the internal structure of the above-mentioned charging system is complicated and the reliability is low.

Method used

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  • Equably charging system of lithium ion power battery pack
  • Equably charging system of lithium ion power battery pack
  • Equably charging system of lithium ion power battery pack

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] image 3 Shown is a schematic structural diagram of the lithium-ion power battery pack equalizing charging system of the present invention, which includes several battery cells 20, a switch S1, several equalizing charging units 40, a single-phase or three-phase AC interface 42, a micro-controller Unit 60 (Micro controller unit, MCU), a dedicated controller 70 and several isolated communication lines 80 .

[0025] The battery cells 20 are connected in series between the positive and negative terminals of the battery pack, and are connected in series to the switch S1 at the negative terminal in the illustrated embodiment. The number of equalizing charging units 40 is the same as the number of battery cells 20 , and the two ends of each equalizing charging unit 40 are respectively connected to the positive and negative poles of one battery cell 20 . The single-phase or three-phase AC interface 42 is respectively connected with all the equalization charging units 40 and pr...

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Abstract

The invention discloses an equably charging system of a lithium ion power battery pack, comprising a plurality of serial battery cells, a single-phase or three-phase AC interface, an MCU, a plurality of equably charging units, a special controller and a plurality of communication cables. The AC interface is respectively connected with all the equably charging units and supplies power to the equably charging units; each equably charging unit is respectively connected with the positive electrode and the negative electrode of one corresponding battery cell and supplies power to the battery cell separately; and the special controller is connected with each equably charging unit and the MCU by the communication cables in a communicating way. Compared with the prior art, the equably charging system carries out separate charging to each battery cell by the equably charging units; in the charging process, the positive electrode and the negative electrode of the battery pack do not form a loop; and the charging states of all battery cells do not influence each other and can reach the full charging state independently, thus the problems caused by inconsistence of the battery cells are effectively avoided.

Description

technical field [0001] The invention relates to a charging system for a lithium-ion power battery pack, in particular to an equal charging system for a lithium-ion power battery pack. Background technique [0002] Lithium-ion power battery packs have many advantages such as high energy density, high specific power, long cycle life, large capacity, and low internal resistance, so they have been increasingly widely used in electric vehicles. [0003] The power battery pack of a power vehicle is generally composed of several battery cells connected in series and parallel, and different battery cells may have certain differences due to different manufacturing and use environments. During the use of the power battery pack, the differences of the battery cells will gradually deteriorate, which not only affects the performance and service life of the entire power battery pack, but also reduces the safety performance. [0004] For example, during the charging process of the power b...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H02J7/00H02J7/02H01M10/44
CPCY02E60/12Y02E60/10
Inventor黄世霖
OwnerDONGGUAN AMPEREX TECH