CN104701899A - Battery equalization management method and equalization device - Google Patents

Battery equalization management method and equalization device Download PDF

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Publication number
CN104701899A
CN104701899A CN201310641543.7A CN201310641543A CN104701899A CN 104701899 A CN104701899 A CN 104701899A CN 201310641543 A CN201310641543 A CN 201310641543A CN 104701899 A CN104701899 A CN 104701899A
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CN
China
Prior art keywords
battery
cell
battery pack
voltage
power supply
Prior art date
Application number
CN201310641543.7A
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Chinese (zh)
Inventor
刘金玉
李金录
Original Assignee
哈尔滨智木科技有限公司
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Application filed by 哈尔滨智木科技有限公司 filed Critical 哈尔滨智木科技有限公司
Priority to CN201310641543.7A priority Critical patent/CN104701899A/en
Publication of CN104701899A publication Critical patent/CN104701899A/en

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Abstract

The invention provides a battery equalization management method. Voltage of a single battery in a battery pack is acquired, the voltage of the single battery in the battery pack is analyzed for each period of time, a supplementary charging power supply is adopted, a battery in need of charging in the battery pack is charged supplementarily, the process is carried out constantly after the battery pack is assembled, life-long equalization management is carried out on the battery pack, and over large difference of performance between single batteries in the battery pack can be prevented. Compared with a method of carrying out equalization charging on the battery pack during the charging process, the method has better effects, and the maintenance cost of the battery pack is reduced.

Description

A kind of battery balanced management method and balancer

Technical field

The present invention relates to a kind of battery balanced management method and balancer, belong to electronic application field.

Background technology

Under the theme background of energy saving standard, research and development are clean, free of contamination electric automobile becomes the only way which must be passed that auto industry realizes sustainable development, at present, the research and development of electric automobile have entered into the initial stage of industrialization, but development is still subject to the restriction in electrokinetic cell useful life, as energy core, the performance of electrokinetic cell directly determines continual mileage and the power performance of electric automobile, because problem of inconsistency after the charging that internal battery pack difference causes is the main cause causing battery life to shorten, employing equalizing charge is the method for the unbalanced problem of existing solution battery pack.

At present, people progressively pay attention to the equalizing charge research of battery pack, and existing balanced charging method has following several, one, the method for bypass, when certain battery core reaches maximum charging voltage in battery pack, start a by-pass current, the electric current flowing through this monomer battery core is reduced, it is made to reduce charging rate, progressively synchronous with other monomer battery cores, but this method cost is higher, and also the ability of equalization is limited, when in battery pack, monomer battery core differs greatly, the method just cannot be applied; Two, electric connecting relation method is changed, change the connected mode of batteries monomer battery core, by the monomer battery core be originally cascaded, changed into by switching device shifter and be connected in parallel, then it is charged, after charging terminates, switch to series system again, this method has its feasibility in theory, but switching device shifter is too complicated, volume is excessive, and using value is little; Three, charged in parallel method, first adopt charger to battery pack serial connection charge, after wherein certain monomer battery core reaches maximum charging voltage, stop charger, switch to independently charger to carry out trickle charge to every monomer battery core, because charger charging current is general comparatively large, and the trickle-charge current of charge independence device is very little, during switching, cause great impact to monomer battery core, this does not meet the rechargeable standard of battery.

The present invention proposes a kind of battery balanced management method, by gathering the voltage of cell in battery pack, per a period of time is analyzed the voltage of cell in battery pack, adopt a boost charge power supply, boost charge is carried out to the battery of charge less in battery pack, this process is carried out after battery pack assembling always, namely to the lifelong balanced management of battery pack, prevent the performance in battery pack between cell from having big difference, this method compares the better effects if to battery pack balancing charging in charging process, and reduces battery pack maintenance cost.

Summary of the invention

The present invention is intended to propose a kind of battery balanced management method and balancer, carries out balanced management charging to the battery pack be made up of many cells, more permanent with the consistency maintained in battery pack between cell.

For realizing above-mentioned object, the present invention adopts following technical scheme:

The present invention proposes a kind of battery balanced management method, and comprise the battery pack and balance management device that form after being connected by many cells, described battery balanced management method comprises the following steps:

(1) voltage sample is carried out to the cell in battery pack, store the voltage tester value of each cell;

(2) timing ratio is compared with the monomer battery voltage in battery pack, by monomer battery voltage test value size order storage battery number and voltage tester value;

(3) switch charge circuit, make boost charge power supply connect the cell that in battery pack, voltage is minimum, start boost charge power supply;

(4) rear closedown boost charge power supply is terminated to the cell boost charge that voltage in battery pack is minimum;

(5) (1) ~ (4) step is repeated, to battery pack equilibrium management.

Described cell can be made up of a battery, also can form by after many identical cell parallels.

In order to realize said method, the present invention proposes a kind of balancer realizing described battery balanced management method, comprise controller (1), DC-DC power module (2), memory module (3), battery voltage sampling unit (4), boost charge power supply (5), charge circuit switch unit (6), cell 1 (7-1) ~ cell N (7-n), is shown in accompanying drawing 1;

DC-DC power module (2) connection control device (1), working power is provided, controller (1) obtains cell 1 (7-1) ~ cell N (7-n) magnitude of voltage through battery voltage sampling unit (4), monomer battery voltage value is stored into memory module (3) by controller (1), controller (1) controls boost charge power supply (5) and charge circuit switch unit (6), boost charge power supply (5) is through the wherein battery charging of charge circuit switch unit (6) to cell 1 (7-1) ~ cell N (7-n).

Beneficial effect of the present invention:

(1) balanced management charging is carried out to the battery pack be made up of many cells, more permanent with the consistency maintained in battery pack between cell;

(2) cell in battery pack is sampled, the monomer battery voltage value of storage can be read when battery pack goes wrong, judge battery pack problem place fast.

accompanying drawing illustrates:

Accompanying drawing 1 is the theory diagram of balancer proposed by the invention.

embodiment:

In order to make technical scheme of the present invention clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail, instantiation described herein, only in order to explain the present invention, is not limited to the present invention.

embodiment:

1, balancer and cell 1 (7-1) ~ cell N (7-n) are formed battery pack to couple together;

2, start balancer, DC-DC power module (2) provides power supply needed for work for device;

3, controller (1) voltage acquisition is carried out to cell 1 (7-1) ~ cell N (7-n) and the voltage tester value storing each cell to memory module (3);

4, controller (1) timing ratio is compared with the monomer battery voltage in battery pack, by monomer battery voltage test value size order storage battery number and voltage tester value;

5, controller (1) switches charge circuit, makes boost charge power supply (5) connect the cell that in battery pack, voltage is minimum, starts boost charge power supply (5) and charges to the cell that voltage in battery pack is minimum;

6, rear controller (1) is terminated to the cell boost charge that voltage in battery pack is minimum and close boost charge power supply (5);

7,3 ~ 6 steps are repeated, administration battery pack equilibrium state.

Claims (3)

1. a battery balanced management method, comprises the battery pack and balance management device that form after being connected by many cells, it is characterized in that: described battery balanced management method comprises the following steps:
(1) voltage sample is carried out to the cell in battery pack, store the voltage tester value of each cell;
(2) timing ratio is compared with the monomer battery voltage in battery pack, by monomer battery voltage test value size order storage battery number and voltage tester value;
(3) switch charge circuit, make boost charge power supply connect the cell that in battery pack, voltage is minimum, start boost charge power supply;
(4) rear closedown boost charge power supply is terminated to the cell boost charge that voltage in battery pack is minimum;
(5) (1) ~ (4) step is repeated, to battery pack equilibrium management.
2. the battery balanced management method of one according to claim 1, is characterized in that: described cell can be made up of a battery, also can form by after many identical cell parallels.
3. one kind realizes the balancer of battery balanced management method according to claim 1, it is characterized in that: comprise controller (1), DC-DC power module (2), memory module (3), battery voltage sampling unit (4), boost charge power supply (5), charge circuit switch unit (6), cell 1 (7-1) ~ cell N (7-n), DC-DC power module (2) connection control device (1), working power is provided, controller (1) obtains cell 1 (7-1) ~ cell N (7-n) magnitude of voltage through battery voltage sampling unit (4), monomer battery voltage value is stored into memory module (3) by controller (1), controller (1) controls boost charge power supply (5) and charge circuit switch unit (6), boost charge power supply (5) is through the wherein battery charging of charge circuit switch unit (6) to cell 1 (7-1) ~ cell N (7-n).
CN201310641543.7A 2013-12-04 2013-12-04 Battery equalization management method and equalization device CN104701899A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105048605A (en) * 2015-09-10 2015-11-11 重庆雅讯电源技术有限公司 Online storage battery pack delayed battery emergency assistant system and working methods thereof
CN105978107A (en) * 2016-07-11 2016-09-28 电子科技大学中山学院 Multi-battery-pack automatic charging and maintenance equalization diagnosis system for electric automobile
CN107634273A (en) * 2016-12-26 2018-01-26 普天新能源车辆技术有限公司 The equalizing system and method for electrokinetic cell

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101103487A (en) * 2005-01-14 2008-01-09 佩勒克股份有限公司 Method for the balanced charging of a lithium-ion or lithium-polymer battery
CN101888106A (en) * 2010-06-11 2010-11-17 李小平 Equalization management system and method of series connected battery pack
CN103066671A (en) * 2013-02-07 2013-04-24 威海威重机电设备有限公司 Uniform charging method and uniform charging device for lithium battery packs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101103487A (en) * 2005-01-14 2008-01-09 佩勒克股份有限公司 Method for the balanced charging of a lithium-ion or lithium-polymer battery
CN101888106A (en) * 2010-06-11 2010-11-17 李小平 Equalization management system and method of series connected battery pack
CN103066671A (en) * 2013-02-07 2013-04-24 威海威重机电设备有限公司 Uniform charging method and uniform charging device for lithium battery packs

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105048605A (en) * 2015-09-10 2015-11-11 重庆雅讯电源技术有限公司 Online storage battery pack delayed battery emergency assistant system and working methods thereof
CN105048605B (en) * 2015-09-10 2017-12-19 重庆雅讯电源技术有限公司 A kind of online batteries behindhand battery emergency response assistant system and its method of work
CN105978107A (en) * 2016-07-11 2016-09-28 电子科技大学中山学院 Multi-battery-pack automatic charging and maintenance equalization diagnosis system for electric automobile
CN107634273A (en) * 2016-12-26 2018-01-26 普天新能源车辆技术有限公司 The equalizing system and method for electrokinetic cell
CN107634273B (en) * 2016-12-26 2020-02-21 普天新能源车辆技术有限公司 Balancing system and method for power battery

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