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Equalization management system and method for nondestructive lithium battery

A balanced management, lithium battery technology, applied in battery circuit devices, current collectors, electric vehicles, etc., to achieve the effect of strong practicability, system efficiency, and simple structure

Inactive Publication Date: 2011-06-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capacity of the lithium battery pack is determined by the battery with the smallest capacity, so the unbalanced capacity of the single cells will shorten the service life of the battery pack

Method used

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  • Equalization management system and method for nondestructive lithium battery
  • Equalization management system and method for nondestructive lithium battery
  • Equalization management system and method for nondestructive lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 , The structure of the non-destructive lithium battery balance management system 100 in the present embodiment in the charging state: the following description about the system 100 takes two battery modules 162, 164 as an example, and actually may include any number of battery modules. The system 100 includes battery modules 162 , 164 , wherein each battery module 162 , 164 includes a single battery 102 , 104 , balancing circuits 112 , 114 , and single-chip microcomputers 122 , 124 ; a balancing management module 130 ; a bus 140 ; ​​and a charger 150 .

[0037] In the aforementioned lossless lithium battery balance management system 100 , the single-chip microcomputer 122 is connected to the battery 102 and the balance circuit 112 . The single-chip microcomputer 102 can periodically detect the voltage of the battery 102 at a predetermined scanning frequency. In addition to measuring the voltage of the battery 102, the single-chip microcomputer 122 ca...

Embodiment 2

[0045] see image 3 , the structure of the non-destructive lithium battery balance management system 300 in this implementation example in the discharge state: the following description about the system 300 takes two battery modules as an example, and actually may include any number of battery modules. The system 300 includes battery modules 362 , 364 , and each battery module 362 , 364 includes a single battery 102 , 104 , balancing circuits 312 , 314 , and single-chip microcomputers 322 , 324 ; a balancing management module 330 ; a bus bar 340 ; and a load 350 .

[0046] The functions and management strategies of each part of the above-mentioned system 300 are similar to those of the system 100, the difference is that the battery works in a discharge state.

[0047] For example, a battery pack with a discharge current Discharge the load. If the voltage of the battery 302 and the average voltage The difference exceeds the threshold , the battery 302 needs to be balance...

Embodiment 3

[0051] see Figure 4 , the structure of the non-destructive lithium battery balance management system 400 in this implementation example in a static state: the following description about the system 400 takes two battery modules as an example, and may actually include any number of battery modules. The system 400 includes battery modules 462 , 464 , each battery module 462 , 464 includes a single battery 402 , 404 , balancing circuits 412 and 414 , single-chip microcomputers 422 and 424 ; a balancing management module 430 ; and a bus 440 .

[0052] The functions and management strategies of each part of the above-mentioned system 400 are similar to those of the system 100, the difference is that the battery is in a static state.

[0053] In the battery balancing management system 400 mentioned above, the batteries are in a static state, and the single-chip microcomputers 402 and 404 can periodically detect the voltages of the batteries 402 and 404 at a predetermined scanning f...

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Abstract

The invention discloses an equalization management system and method for a nondestructive lithium battery. The equalization management system for the nondestructive lithium battery comprises at least two battery modules, wherein each module comprises a single battery, an equalizing circuit and a single chip microcomputer; and the single chip microcomputer is connected with the single battery and the equalizing circuit and used for obtaining the voltage of the single battery and the information of the equalizing circuit so as to provide relevant control and protection. An equalization management module is connected with the single chip microcomputer and used for generating a reference signal according to the voltage of the single battery provided by the single chip microcomputer. The single chip microcomputer in each battery module controls the equalizing circuit to equalize the single battery according to the reference signal, and the equalizing circuit shunts or additionally discharges the single battery which needs to be equalized, so as to achieve equalization. Meanwhile, the energy can be recycled, the system efficiency is improved, and the power consumption is reduced. The battery equalization management system and method disclosed by the invention are applicable to various working conditions of a battery pack and have the characteristics of simple and modular structure, strong practicability and energy recovery.

Description

Technical field: [0001] The invention belongs to the technical field of battery equalization management, and in particular relates to a non-destructive lithium battery equalization management system and method, in particular to a system and method for non-destructive equalization management of a battery pack composed of multiple single lithium batteries connected in series and parallel. Background technique: [0002] In power applications, single-cell lithium batteries usually cannot meet the requirements of electrical equipment in terms of power supply voltage and capacity. Lithium batteries are usually used in series and parallel, and their internal structure is based on multiple parallel single batteries. During the working process of the lithium battery pack, due to the inconsistency between the single cells in the battery pack, continuous cycle charging and discharging will lead to unbalanced battery capacity, which is specifically manifested as a sharp attenuation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 邵定国王浩
Owner SHANGHAI UNIV
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