CN102055210A - Equalizing charge method and device for series battery pack - Google Patents
Equalizing charge method and device for series battery pack Download PDFInfo
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- CN102055210A CN102055210A CN2009101537287A CN200910153728A CN102055210A CN 102055210 A CN102055210 A CN 102055210A CN 2009101537287 A CN2009101537287 A CN 2009101537287A CN 200910153728 A CN200910153728 A CN 200910153728A CN 102055210 A CN102055210 A CN 102055210A
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- equalizing
- relay
- battery pack
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses an equalizing charge method and an equalizing charge device for a series battery pack. The device consists of a detection circuit, a switch circuit, equalizing circuits and a battery pack, wherein the switch circuit is connected between the detection circuit and an equalizing circuit group; and each equalizing circuit corresponds to the battery pack. The equalizing charge device is characterized in that: each equalizing circuit is formed by an operational amplifier U2, a relay and a load resistor R2, wherein the relay J2 is connected between the output end of an operational amplifier U1 and the switch circuit; and the load resistor R2 is connected in series with a relay switch K2 and is connected in parallel to a battery unit. In the technical scheme, the charging process is divided into three phases, the load resistor is arranged in the equalizing circuits additionally, so that batteries realize dynamic equalization in the charging process. Therefore, the equalizing charge device improves the charging speed greatly, has the simple circuit design and low production, and is easy to promote and use in chargers of ordinary low-end products.
Description
Technical field
The present invention relates to the battery boosting technology field, particularly relate to a kind of balanced charging method and device thereof of series battery.
Background technology
For enough voltage is provided to power consumption equipment, usually need be by a plurality of batteries battery pack that is in series.But, since the accuracy of manufacture, the factor of technology controlling and process and detection means, and parameters such as internal resistance between the different batteries, capacity, self-discharge rate unavoidably have certain difference.This species diversity causes the total capacity of power brick to be limited by the capacity in light current pond.If do not take balanced measure, through charge and discharge cycles repeatedly, this species diversity can further enlarge, and the power brick total capacity is further reduced.Always reach at first during light current pond charging and be full of voltage, always reach emptying voltage during discharge at first, light current pond experience is filled the circulation of putting entirely entirely, performance degradation speed is faster than other battery, through after the charge and discharge cycles repeatedly, difference has cumulative effect, thereby the power brick total capacity is further reduced.For this reason, need carry out equalizing charge to series battery.
In order to realize the series battery equalizing charge, Chinese patent 200610034284.1 " a kind of balanced charging method of series battery and device thereof " provides a kind of makes original unbalanced battery pack through once becoming balanced fully after the charging, its content is: a kind of balanced charging device of series battery, comprise charger, charge switch, controller and the battery pack and equalizer and the current direction detector that are composed in series by at least two batteries, every batteries of described composition battery pack equalizer in parallel, corresponding with series battery, each equalizer is connected in series, one is connected with charge switch in two equalizers of outermost end, another is connected with current direction detector, and charge switch is connected with charger respectively with current direction detector; The input of described each equalizer connects, and is connected with the output of controller, and the output of each equalizer connects, and is connected with the input of controller, and described controller also is connected with current direction detector with charge switch respectively.Described equalizer comprises power control switch, voltage comparator, reference voltage source and discharge circuit, voltage comparator positive input terminal and equalizer anode in parallel be connected, negative input end is connected with reference voltage source, voltage comparator also is connected with controller with power control switch, discharge circuit respectively and is connected, the output of described voltage comparator is the output of equalizer, and the input of power control switch is the input of equalizer.
From the disclosed technology contents analysis of patent documentation, the main feature of this technical scheme is before charging, at first the battery of each unit in the battery pack is reached the threshold voltage of setting by discharge, then whole battery group being unified charging, briefly is a kind of technical scheme of equilibrium in early stage.Therefore, the circuit that this technical scheme adopted not only exists the defective of circuit relative complex, and the problem that cost is higher is difficult to promote the use of for the products such as battery of electric vehicle of low side consumption.And the charging process time is also longer, also exists certain energy waste.
Summary of the invention
At the technological deficiency that exists in the such scheme, the invention provides a kind of charging method of later stage equilibrium, the balancing procedure of battery pack in charging process is set in the charging process, to overcome the defective of long and energy waste of the line design complexity, the charging interval that exist in the prior art.
Technical solution of the present invention is a kind of balanced charging device of series battery, form by testing circuit, switching circuit, equalizing circuit, battery, wherein switching circuit is connected between testing circuit and the equalizing circuit group, every group of equalizing circuit is corresponding with battery pack, it is characterized in that described equalizing circuit is by operational amplifier U
2, relay and load resistance R
2Constitute, wherein relay J
2Be connected on operational amplifier U
1Between output and the switching circuit, load resistance R2 and relay switch K
2Be connected in parallel on the battery unit after the series connection.
Described equalizing circuit comprises equalizing circuit 1, equalizing circuit 2, equalizing circuit 3... equalizing circuit n, and described battery comprises battery 1, battery 2, battery 3... battery n, and wherein each equalizing circuit is all corresponding with battery.
Described switching circuit is by operational amplifier U
1And relay J
1Constitute, wherein relay J
1Coil one end and operational amplifier U
1Output connects, and the other end is connected on the input power supply, relay switch K
1Relay J in one end and the equalizing circuit
2Coil one end connects, the other end be connected with its corresponding battery unit.
A kind of balanced charging method of series battery comprises the steps:
A, directly charging: determine by testing circuit whether battery pack needs charging, when battery pack is forced down threshold voltage in battery pack, testing circuit engages by amplifier command switch circuit, relay J 2 work in the equalizing circuit, make load resistance R2 be in off state, be in the series connection battery unit and enter charging process;
B, branch current charge: when certain battery unit charging is finished, reach rated voltage, operational amplifier U2 positive input in the equalizing circuit and reverse input end voltage difference are 0, commands relays J2 action, relay switch K2 is engaged, load resistance R2 is in parallel with its pairing battery B, resistance in the circuit of this combination is descended, causing being in the voltage that is distributed on other battery units of polyphone state improves, other battery unit maintenance charged states are finished charging process until each battery unit;
C, balanced floating charge: charging voltage and battery voltage are realized balance, operational amplifier positive input in the testing circuit and reverse input end voltage difference are 0, switching circuit disconnects, cause the relay J 2 in the equalizing circuit to quit work, each load resistance disconnects, and battery pack floating charge under the electric voltage equalization state is up to the stable standard that reaches setting of battery voltage, disconnect charging circuit, recover the power supply output state of battery pack.
Because the technical program is divided into three phases with charging process, and in equalizing circuit, set up load resistance, the dynamic equalization that made realization in the battery charging process, therefore, improved charging rate greatly, and the circuit design that is adopted is simple, and production cost is low, very easily promotes the use of on the charger of common low-end product.
Description of drawings
Fig. 1 is the theory diagram of the balanced charging method of battery pack;
Fig. 2 is the circuit diagram of the balanced charging device of battery pack.
Embodiment
The charging object is the battery pack that four battery units are formed, the operation principle of balanced charging device as shown in Figure 1, the battery pack of being made up of testing circuit 1, switching circuit 2, four block balance circuit 3 and four battery units 4 constitutes, wherein switching circuit 2 is connected between 3 groups of testing circuit 1 and the equalizing circuits, every block balance circuit 3 is corresponding with battery pack, and equalizing circuit 3 is by operational amplifier U
2, relay J
2And load resistance R
2Constitute, wherein relay J
2Be connected on operational amplifier U
1Between output and the switching circuit 2, load resistance R
2With relay switch K
2Be connected in parallel on the battery unit 4 relay switch K after the series connection
2Be in normally open.
Operational amplifier U
2Can select LM339 for use, its normal phase input end joins by the negative pole of a voltage stabilizing didoe D2 and battery B, forms contrast potential, and inverting input is connected on the positive pole of battery B, and the resistance of load resistance R2 is selected 150 ohm.
Its course of work comprises the steps: to determine by testing circuit 1 whether battery pack needs charging, and when battery pack was forced down threshold voltage in battery pack, testing circuit 1 was by 2 work of amplifier command switch circuit, the relay J in the equalizing circuit 3
2Work makes load resistance R2 be in off-state, and four battery unit B are in series connection, carry out charging process, finishes when certain battery unit B charging, reaches rated voltage, the operational amplifier U in the equalizing circuit 3
2No level output, commands relays J
2Action makes relay switch K
2Engage, load resistance R2 is connected, be parallel on the corresponding battery unit B, the circuit resistance that this battery and resistance are formed descends, cause the charging voltage on other each element cells of not finishing charging to improve, thereby accelerated the charging rate of other element cells, finish charging process until each battery unit 4, charging voltage and battery voltage are realized balance, operational amplifier U1 positive input in the testing circuit 1 and reverse input end voltage difference are 0, no level output, and switching circuit 2K1 opens, cause the relay J 2 in the equalizing circuit 3 to quit work, each load resistance R
2Disconnect, battery pack B floating charge under the electric voltage equalization state up to the stable standard that reaches setting of battery pack B voltage, recovers the power supply output state of battery pack B.
The charging object is the battery pack that eight battery units are formed, and native system is realized the equalizing charge of the lead plumbate battery series battery of 8 12 ampere-hour capacities.Charger voltage 96V, charging current 2.0A, balanced charging device and charging process are with embodiment 1.
Claims (5)
1. the balanced charging device of a series battery, form by testing circuit (1), switching circuit (2), equalizing circuit (3), battery pack (4), wherein switching circuit (2) is connected between testing circuit (1) and equalizing circuit (3) group, every group of equalizing circuit (3) is corresponding with battery pack (4), it is characterized in that described equalizing circuit (3) is by operational amplifier U
2, relay and load resistance R
2Constitute, wherein relay J
2Be connected on operational amplifier U
1Between output and the switching circuit (2), load resistance R
2With relay switch K
2Be connected in parallel on after the series connection on the battery unit (4).
2. balanced charging device as claimed in claim 1, it is characterized in that comprising equalizing circuit (31), equalizing circuit (32), equalizing circuit (33) ... equalizing circuit (3n) according to described equalizing circuit (3), described battery comprises battery (41), battery (42), battery (43) ... battery (4n), and wherein each equalizing circuit is all corresponding with battery.
3. balanced charging device as claimed in claim 1 is characterized in that according to the internal resistance of described load resistance R2 value greater than battery unit B.
4. balanced charging device as claimed in claim 1, its feature are that also described switching circuit (2) is by operational amplifier U
1And relay J
1Constitute, wherein relay J
1Coil one end and operational amplifier U
1Output connects, and the other end is connected on the input power supply, relay switch K
1Relay J in one end and the equalizing circuit (3)
2Coil one end connects, the other end be connected with its corresponding battery unit (4).
5. the balanced charging method of a series battery comprises the steps:
A, directly charging: determine by testing circuit (1) whether battery pack (4) needs charging, when battery pack (4) is forced down threshold voltage in battery pack 4, testing circuit (1) engages by amplifier command switch circuit (2), relay J 2 work in the equalizing circuit (3), make load resistance R2 be in off state, be in the series connection battery unit and enter charging process;
B, branch current charge: when certain battery unit charging is finished, reach rated voltage, operational amplifier U2 positive input in the equalizing circuit (3) and reverse input end voltage difference are 0, commands relays J2 action, relay switch K2 is engaged, load resistance R2 is in parallel with its pairing battery B, resistance in the circuit of this combination is descended, causing being in the voltage that is distributed on other battery units of polyphone state improves, other battery unit maintenance charged states are finished charging process until each battery unit;
C, balanced floating charge: charging voltage and battery pack (4) voltage is realized balance, operational amplifier positive input in the testing circuit (1) and reverse input end voltage difference are 0, switching circuit (2) disconnects, cause the relay J 2 in the equalizing circuit (3) to quit work, each load resistance disconnects, and battery pack (4) floating charge under the electric voltage equalization state is up to the stable standard that reaches setting of battery pack (4) voltage, disconnect charging circuit, recover the power supply output state of battery pack (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101537287A CN102055210A (en) | 2009-11-01 | 2009-11-01 | Equalizing charge method and device for series battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101537287A CN102055210A (en) | 2009-11-01 | 2009-11-01 | Equalizing charge method and device for series battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102055210A true CN102055210A (en) | 2011-05-11 |
Family
ID=43959287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101537287A Pending CN102055210A (en) | 2009-11-01 | 2009-11-01 | Equalizing charge method and device for series battery pack |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001288A (en) * | 2012-11-20 | 2013-03-27 | 中航锂电（洛阳）有限公司 | Battery pack charge-discharge balancing method, balancing device and maintenance device |
| CN104092256A (en) * | 2014-07-04 | 2014-10-08 | 山东金煜电子科技有限公司 | Specific direct-current storage battery charging device |
| CN104521058A (en) * | 2012-08-08 | 2015-04-15 | 罗伯特·博世有限公司 | Replacement cell for a battery system |
| CN107444158A (en) * | 2017-08-10 | 2017-12-08 | 清华四川能源互联网研究院 | A kind of equalization methods of modular battery packet system |
| CN109494845A (en) * | 2018-12-29 | 2019-03-19 | 东莞亿动智能科技有限公司 | Load driving control system |
| CN109904885A (en) * | 2017-12-08 | 2019-06-18 | 神讯电脑(昆山)有限公司 | Battery pack pressure difference automatic balancing arrangement |
| US10498146B2 (en) | 2016-03-30 | 2019-12-03 | General Electric Company | Charging device, system and method |
-
2009
- 2009-11-01 CN CN2009101537287A patent/CN102055210A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104521058A (en) * | 2012-08-08 | 2015-04-15 | 罗伯特·博世有限公司 | Replacement cell for a battery system |
| CN104521058B (en) * | 2012-08-08 | 2020-04-17 | 罗伯特·博世有限公司 | Replacement battery cell for a battery system |
| CN103001288A (en) * | 2012-11-20 | 2013-03-27 | 中航锂电（洛阳）有限公司 | Battery pack charge-discharge balancing method, balancing device and maintenance device |
| CN103001288B (en) * | 2012-11-20 | 2015-09-30 | 中航锂电（洛阳）有限公司 | Battery set charge/discharge equalization methods, balancer and attending device |
| CN104092256A (en) * | 2014-07-04 | 2014-10-08 | 山东金煜电子科技有限公司 | Specific direct-current storage battery charging device |
| US10498146B2 (en) | 2016-03-30 | 2019-12-03 | General Electric Company | Charging device, system and method |
| CN107444158A (en) * | 2017-08-10 | 2017-12-08 | 清华四川能源互联网研究院 | A kind of equalization methods of modular battery packet system |
| CN109904885A (en) * | 2017-12-08 | 2019-06-18 | 神讯电脑(昆山)有限公司 | Battery pack pressure difference automatic balancing arrangement |
| CN109494845A (en) * | 2018-12-29 | 2019-03-19 | 东莞亿动智能科技有限公司 | Load driving control system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110511 |