CN1638183A - Battery charging voltage balancing system - Google Patents
Battery charging voltage balancing system Download PDFInfo
- Publication number
- CN1638183A CN1638183A CNA031140033A CN03114003A CN1638183A CN 1638183 A CN1638183 A CN 1638183A CN A031140033 A CNA031140033 A CN A031140033A CN 03114003 A CN03114003 A CN 03114003A CN 1638183 A CN1638183 A CN 1638183A
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- Prior art keywords
- battery
- protection circuit
- circuit plate
- batteries
- switch
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to secondary battery technology, and is especially one kind of battery charging voltage balancing system. The technological scheme is that the batteries are connected with switches and protecting circuit board in either of two work states, including the state-1 with serial connection of batteries and the connection between the serially connected batteries and the protecting circuit board, and the state-2 with parallel connection of batteries and the disconnection of the parallel connected batteries from the protecting circuit board. In the said connection structure, the batteries in the state-1 may be charged or discharged conventionally, and the batteries in the state-2 without charging and discharging may have their voltage balanced.
Description
Technical field:
The present invention relates to secondary battery technology, refer in particular to a kind of balance of voltage system of batteries charging.
Background technology:
Along with the development of modernized society, mobile device has obtained application more and more widely (as information and the communication industry at high speed development), and it has formed the wilderness demand to high-energy battery.Exactly for the automobile industry that grows up already, because modernized society is to environmental protection requirement, it is also waiting for safer, the more development of macrocell of capacity.For notebook computer, the mobile device that power consumption such as automatic bike, electric automobile is bigger all needs a plurality of jumbo battery series connection to form battery pack together and just can reach requirement.
The battery pack that a plurality of battery are cascaded and form, if each battery is charged separately, charging device just needs too many, and with the charging that is connected in parallel of a plurality of battery, the electric current during charging just may be too big, the damage product.The charging that in addition battery is cascaded then can bring a problem: because a plurality of battery are cascaded, the performance that can't guarantee each battery is just the same, after repeatedly filling the circulation of (putting) electricity, the both end voltage that will appear at when charging certain or some battery at first reaches the upper voltage limit (protecting voltage) of two circuit boards, continues charging again these battery are overcharged; And the lower voltage limit that the both end voltage of certain or some battery at first reaches circuit board the time can appear in discharge equally, continues discharge again and just may be these battery and cross and put.And both of these case all can destroy the structure of battery, shortens the life cycle of battery.
At the above-mentioned problem that overcharges or put excessively, people also expect some solutions, on battery pack, can connect a protection circuit plate, as see accompanying drawing 1, it is exactly the circuit diagram that a typical battery pack adds protection circuit plate 1, protection circuit plate 1 is provided with electric current both positive and negative polarity output 21,22, electric current both positive and negative polarity input 23,24, and the monitor input terminal 25,26 of corresponding each battery, connect load (when working) or charger (when using) between the both positive and negative polarity output 21,22 for charging for peripheral hardware; And battery 01,02,03 is cascaded.During use, see accompanying drawing 2, the positive terminal 011 of whole series battery is connected with the both positive and negative polarity input 23,24 of protection circuit plate 1 respectively with negative pole end 031.And a battery 02 its both positive and negative polarity 021,022 in the series battery is connected with the monitor input terminal 25,26 of battery respectively.So, the both positive and negative polarity input 23,24 of protection circuit plate 1 can monitor the voltage of whole series battery, and the monitor input terminal 25,26 of single battery core can monitor the voltage of the battery 02 that is attached thereto.When charging is as long as the total voltage of battery pack reaches upper voltage limit or wherein the voltage of certain battery at first arrives upper voltage limit (during actual the use, the upper voltage limit of single battery core is more bigger divided by the value of battery number than whole series battery upper voltage limit) circuit automatic disconnection like this.In the discharge process, principle similarly, as long as the total voltage of battery pack reaches lower voltage limit or wherein the voltage of certain battery at first arrives lower voltage limit (during actual the use, the lower voltage limit of single battery core is smaller divided by the value outline of battery number than whole series battery lower voltage limit).Certainly take the number of battery series connection to be not restricted to three represented in the accompanying drawing 1,2 battery, its a plurality of battery of can connecting according to actual needs, its connected mode is identical with above-mentioned structure, as sees accompanying drawing 3.
When taking above-mentioned protected mode, have only the performance of each battery of series connection just the same, and the starting voltage of at every turn filling (putting) electricity is too the time, the total voltage of battery pack could be when reaching the upper limit or lower voltage limit open circuit.But this is a kind of perfect condition, if the performance of series connected battery core or to fill the starting voltage in (putting) when electricity different, fill so (putting) when electricity just might certain or some the voltage at battery two ends at first reach the upper limit or lower voltage limit, cause the electric weight of other battery to be full of or to have put, cause total electric weight efficient of whole battery group to reduce.And it is more and more serious that this situation will become along with the continuous increase of charge and discharge cycle number of times.
Below be that people are the method that the above-mentioned existing problems of solution are adopted: 1, which two these circulation of battery the charge condition according to circulation last time decides do the balance of voltage, as sees U.S. patent documents US PATENT 6114835; At any time monitor the voltage at each battery two ends when 2, charging, and adjust at any time, as see U.S. patent documents US PATENT 5900716; 3, each battery adds MOSFET control bypass, when certain battery at first reaches upper voltage limit, then it is communicated with bypass, and the battery of all the other underfill electricity continues charging, as sees U.S. patent documents USPATENT 5897973; 4, charging the time utilizes disconnecting again with each battery is in parallel that capacitor do not stop, comes balanced voltage with this, as sees U.S. patent documents US PATENT 6518725.It is exactly that the charge protection circuit is too complicated that but all there is a common shortcoming in these solutions, and the reliability of some protection circuit is not high yet.
Summary of the invention:
The object of the present invention is to provide a kind of system that solves battery voltage balance when charging.
The present invention is achieved through the following technical solutions: battery pack is connected with the protection circuit plate by switch, and switch has following two kinds of operating states: one, battery pack is connected mutually, and by this switch the series connected battery group is communicated with the protection circuit plate; Two, battery pack parallel connection, and pass through this switch with parallel battery and the disconnection of protection circuit plate.
After adopting this line construction, when battery pack need be charged or work (being the power supply of load), switch is in state one, and battery pack is charged or worked as present common batteries group; When battery pack does not need charging or when work, switch is in state two, all battery parallel connections, make each battery the balance of voltage, equate.As long as the performance classes of each battery seemingly, when filling (putting) electricity once more, the voltage at each battery two ends just always is in almost equal state, and battery can be full of simultaneously during charging, and can put simultaneously during discharge, effectively improves the service efficiency of battery.
Description of drawings:
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1 is the circuit diagram of present series battery with the protection circuit plate;
Fig. 2 is the circuit diagram that present series battery connects with the protection circuit plate;
Fig. 3 is the circuit omission schematic diagram of present series battery with the protection circuit plate;
Fig. 4 be among the present invention battery pack with the circuit diagram of protection circuit plate;
Fig. 5 is the circuit diagram that battery pack is connected with the protection circuit plate among the present invention;
Fig. 6 be among the present invention battery pack with the circuit diagram of protection circuit plate parallel connection.
Embodiment:
See accompanying drawing 4, battery pack 1 is connected with protection circuit plate 2 by switch, and switch has following two kinds of operating states:
State one, battery pack 1 is connected mutually, and series connected battery group 1 is communicated with protection circuit plate 2, see accompanying drawing 5 by this switch.
State two, make battery pack 1 parallel connection, and parallel battery 1 and protection circuit plate 2 are disconnected, as see accompanying drawing 6 by this switch.
Each battery of battery pack 1 protective resistance of all connecting.
Connect load (during work) or charger (during charging) between the both positive and negative polarity current output terminal 21,22 of protection circuit plate 2; The positive terminal 011 of whole series battery 1 is connected with the both positive and negative polarity input 23,24 of protection circuit plate 1 respectively with negative pole end 031; And its both positive and negative polarity of each battery in the series battery 1 is connected with the monitor input terminal of battery in the protection circuit plate 2 respectively, is connected with the monitor input terminal 25,26 of battery respectively as 02 its both positive and negative polarity 021,022 of a battery in the accompanying drawing series battery.
When battery pack 1 parallel connection; an end 013,023,033 that is about to battery 01,02,03 links together; the other end 011,021,032 of battery 01,02,03 is linked together, and lead to this switch, as see accompanying drawing 6 parallel battery 1 and 2 disconnections of protection circuit plate.
After adopting this line construction, when battery pack 1 needs charging or work (being the power supply of load), switch is in state one, and battery pack 1 is charged or worked as present common batteries group; When battery pack 1 does not need charging or when work, switch is in state two, all battery parallel connections, make each battery the balance of voltage, equate.As long as the performance classes of each battery seemingly, when filling (putting) electricity once more, the voltage at each battery two ends just always is in almost equal state, and battery can be full of simultaneously during charging, and can put simultaneously during discharge, effectively improves the service efficiency of battery.
Claims (3)
1, the balance of voltage system of batteries charging is characterized in that: battery pack (1) is connected with protection circuit plate (2) by switch, and switch has following two kinds of operating states:
A, make mutually series connection of battery pack (1), and series connected battery group (1) is communicated with protection circuit plate (2) by this switch;
B, make battery pack (1) parallel with one another, and parallel battery (1) and protection circuit plate (2) are disconnected by this switch.
2, the balance of voltage system of batteries charging according to claim 1 is characterized in that: each battery of battery pack (1) protective resistance of all connecting.
3, the balance of voltage system of batteries charging according to claim 1 is characterized in that: connect load (during work) or charger (during charging) between the electric current both positive and negative polarity output (21) of protection circuit plate (2), (22); The positive terminal (011) of whole series battery (1) is connected with electric current both positive and negative polarity input (23), (24) of protection circuit plate (1) respectively with negative pole end (031); And its both positive and negative polarity of each battery in the series battery (1) respectively with protection circuit plate (2) in the monitor input terminal connection of corresponding battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031140033A CN1638183A (en) | 2003-03-28 | 2003-03-28 | Battery charging voltage balancing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031140033A CN1638183A (en) | 2003-03-28 | 2003-03-28 | Battery charging voltage balancing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1638183A true CN1638183A (en) | 2005-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031140033A Pending CN1638183A (en) | 2003-03-28 | 2003-03-28 | Battery charging voltage balancing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1638183A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134234A1 (en) * | 2010-04-28 | 2011-11-03 | 浙江绿源电动车有限公司 | Battery device and battery accommodating device |
| CN102284436A (en) * | 2011-05-20 | 2011-12-21 | 青岛海霸能源集团有限公司 | Method for selecting monomer batteries before assembly of power battery pack |
| CN101483263B (en) * | 2008-01-11 | 2013-11-20 | 通用汽车环球科技运作公司 | HV battery equalization charge during driving operation in fuel cell hybrid vehicles |
-
2003
- 2003-03-28 CN CNA031140033A patent/CN1638183A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483263B (en) * | 2008-01-11 | 2013-11-20 | 通用汽车环球科技运作公司 | HV battery equalization charge during driving operation in fuel cell hybrid vehicles |
| WO2011134234A1 (en) * | 2010-04-28 | 2011-11-03 | 浙江绿源电动车有限公司 | Battery device and battery accommodating device |
| CN102284436A (en) * | 2011-05-20 | 2011-12-21 | 青岛海霸能源集团有限公司 | Method for selecting monomer batteries before assembly of power battery pack |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |