CN201146223Y - Pressure-equalizing device for monomer battery voltage of each lithium battery set - Google Patents
Pressure-equalizing device for monomer battery voltage of each lithium battery set Download PDFInfo
- Publication number
- CN201146223Y CN201146223Y CNU2007200758541U CN200720075854U CN201146223Y CN 201146223 Y CN201146223 Y CN 201146223Y CN U2007200758541 U CNU2007200758541 U CN U2007200758541U CN 200720075854 U CN200720075854 U CN 200720075854U CN 201146223 Y CN201146223 Y CN 201146223Y
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- voltage
- lithium battery
- energy
- battery group
- electronic 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)
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Abstract
The utility model relates to an equalizing device for each single cell voltage in a lithium battery pack, which comprises a box body, a lithium battery pack and an electric circuit board provided with electronic switch components, an energy storage element and a singlechip. The electronic switch components are electrically connected together by a group of electrode leading pins formed by that one ends of the leading pins are connected with single cells in series; the other end is connected with a leading pin of the energy storage element by a polarity switch; the leading pin of the energy storage element is electrically connected with a signal input/output pin of the singlechip by an electronic sampling switch. The closing and opening of the electric switch is controlled by the singlechip, the voltage sampling is carried out, the surplus electric energy in a single cell with higher voltage in the energy storage element is taken out and stored in the energy storage element to lower the voltage, and then the electric energy stored in the energy storage element is transmitted to the single cell with lower voltage to increase the voltage, so that under the automatic control of the singlechip, the electric energy is transmitted according to the requirement and the voltage in each single cell of the battery pack tends to be accordant, thus realizing the pressure equalizing and being beneficial for saving energy and prolonging the service life of the lithium battery pack.
Description
Technical field
The utility model relates to power supply voltage stabilizing technique field, the pressure-equalizing device of each monomer battery voltage in particularly a kind of lithium battery group.
Background technology
The used lithium battery group of electric bicycle or electric automobile adopts when dispatching from the factory usually carries out the voltage method for screening to each cell and picks out the cell of voltage unanimity and be assembled into the lithium battery group.But because each cell inherent quality difference tends to occur very soon the too high or too low phenomenon of some monomer battery voltage in actual use, thereby influences the useful working life of whole lithium battery group.For this situation, usually adopt the method for conductive discharge power consumption in the prior art, disclosed technology in No. 02116423.1 patent of China for example bleeds off portion of energy with the cell of overtension, make it voltage and descend, with the explosion accident of avoiding causing because of monomer battery voltage is too high.This method can discharge to the cell of overtension step-down, can avoid taking place the explosion accident of lithium battery group effectively, have certain practicality.But owing to wherein only solved the discharge step-down problem of some overtension cell, and cut little ice for the cell of the brownout in the lithium battery group, and what the discharge step-down of overtension cell was adopted is the method for resistance power consumption, energy is not rationally utilized, slatterned but be consumed, in addition, because voltage cell on the low side is not taked the measure of boosting, so the overall work life-span to the lithium battery group helps little, thereby, still owe desirable from economy and point of view of practicability consideration.
The utility model content
The purpose of this utility model is will provide a kind of can solve the too high problem of some monomer battery voltage in the lithium battery group, can solve the low excessively problem of some monomer battery voltage again, thereby each monomer battery voltage that helps being connected in the lithium battery group reaches unanimity, helps prolonging the pressure-equalizing device of each monomer battery voltage in the lithium battery group of lithium battery group useful working life.
The method of voltage equalizing of monomer battery voltage in lithium batteries of the present utility model is such: by the energy-storage travelling wave tube of a controlled reception storage electric energy of energy and electric energy that controlled outside transfer is stored is set, one single-chip microcomputer with signal input and output control signal function is set, one group is arranged on the electronic switch between each cell electrode and energy-storage travelling wave tube and single-chip microcomputer signal I/O pin in the lithium battery group, control the closure/disconnection of each electronic switch as required by single-chip microcomputer, execution detects the voltage sample of each cell, and judge the voltage condition of each cell, control the closed respective electronic switch that is arranged between cell and energy-storage travelling wave tube more in view of the above as required, execution stores the metastatic of the electric energy in the higher cell of voltage in energy-storage travelling wave tube, make it step-down, electric energy stored in the energy-storage travelling wave tube is carried out electric energy to voltage cell on the low side as required to be replenished, make it to boost, so single-chip microcomputer automatically touring detect and control under the electric energy in the higher cell is transferred in the voltage cell on the low side and goes with voltage, the voltage of each cell in the lithium battery group is reached unanimity, thereby the voltage of realizing each cell in the lithium battery group is all pressed.
The pressure-equalizing device main body of each monomer battery voltage includes box body, lithium battery group and electric circuit board in the lithium battery group of the present utility model, lithium battery group and electric circuit board all are arranged in the box body chamber, the lithium battery group is in series as required by a plurality of cells, at least be provided with two, fixedly comprise on the electric circuit board and be provided with electronic switch assembly, energy-storage travelling wave tube and single-chip microcomputer.Wherein: described electronic switch assembly by one group of one end connect with cell respectively that the electrode leading foot that forms of back is electrically connected, the other end forms with the electronic switch that the leading foot of energy-storage travelling wave tube is electrically connected behind polarity reversing switch, the quantity that cell set in quantity and the lithium battery group is set of electronic switch is relevant; N+1 electrode leading foot for being formed by n cell series connection back just need be provided with n+1 electronic switch, in addition, also is respectively arranged with the sampling electronic switch between the leading foot at the signal I/O pin of single-chip microcomputer and energy-storage travelling wave tube two ends; Described energy-storage travelling wave tube is filled the post of by capacitor or inductor; Comprise on the described single-chip microcomputer and be provided with signal I/O pin and control signal output pin.
During work, control the closed or disconnection of each electronic switch according to the order of sequence by single-chip microcomputer, execution is to the sample detecting of each monomer battery voltage, and the closed as required respective electronic switch that is electrically connected with the energy-storage travelling wave tube leading foot, the unnecessary electric energy in the higher cell of voltage is taken out in execution, making it voltage reduces, and the electric energy that takes out transferred in the energy-storage travelling wave tube store, again electric energy stored in the energy-storage travelling wave tube is transferred in the voltage cell on the low side and goes, making it voltage raises, transfer electrical energy as required incessantly under the automatic control of single-chip microcomputer like this, each monomer battery voltage in the lithium battery group is reached unanimity, thereby the voltage of realizing each cell in the lithium battery group is all pressed.
In addition, in lithium battery group of the present utility model, also can be provided with the voltage conversion circuit of guaranteeing the single-chip microcomputer operate as normal and voltage sample control circuit, current sample control circuit, temperature sampling circuit and temperature sensor in the pressure-equalizing device of each monomer battery voltage as required with lithium battery charge and discharge protective function.
Pressure-equalizing device based on each monomer battery voltage in the utility model lithium battery group of above-mentioned design, owing to adopted the electric energy that utilizes the energy-storage travelling wave tube storage from the higher cell of each voltage, to take out, the store electrical energy that also will take out to be used for again replenishing voltage cell on the low side, effectively avoided in the prior art by resistance consumption waste of electric energy phenomenon; Owing on the basis that single-chip microcomputer detects the touring voltage sample of each cell work, carry out as required taking out electric energy the higher cell from voltage, and stored, the metastatic that voltage cell on the low side is carried out electric energy replenishes again, make the voltage convergence of each cell in the lithium battery group after Single-chip Controlling is handled, all press, effectively overcome each monomer battery voltage of the prior art and just differed and the higher cell of a processes voltage, not voltage inequality between each cell in the lithium battery group that causes of the result of processes voltage cell on the low side, cause short drawback of lithium battery group real work life-span.Therefore, the pressure-equalizing device of each monomer battery voltage in the lithium battery group of the present utility model, SCM Based automatic control, transfer electrical energy as required incessantly, make interior each monomer battery voltage of lithium battery group be in equal pressure condition, help energy savings and prolong the useful working life of lithium battery group, method is reliable and scientific and reasonable, has tangible operability, simple in structure and easy to use, the work safety and reliable of device, thereby have tangible technical advance, remarkable economy and very strong practicality.
Description of drawings
Fig. 1 is the general structure schematic diagram of the utility model embodiment;
Fig. 2 is the electrical installation principle schematic of the utility model embodiment:
Fig. 3 is the electrical schematics by a kind of lithium battery group manager of utility model embodiment structure.
Among the figure:
1. box body 2. lithium battery groups 3. electric circuit boards 4. cells
5. electronic switch assembly 6. energy-storage travelling wave tubes 7. single-chip microcomputers 8. electronic switches
9. voltage conversion circuit 10. voltage sample control circuits 11. current sample control circuits
12. temperature sampling circuit 13. temperature sensors 14. sampling electronic switches
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and exemplary embodiments.
In Fig. 1 and Fig. 2, the pressure-equalizing device main body of each monomer battery voltage includes box body 1, lithium battery group 2 and electric circuit board 3 in the lithium battery group of the utility model embodiment.Lithium battery group 2 and electric circuit board 3 all are arranged in the chamber of box body 1, lithium battery group 2 is in series by 9 (D1-D9) cells 4 as required, fixedly comprises on the electric circuit board 3 to be provided with electronic switch assembly 5, energy-storage travelling wave tube 6, sampling electronic switch 14 and single-chip microcomputer 7.Wherein: described electronic switch assembly 5 by one group of one end be with code name that the cell 4 of D1-D9 connects that ten electrode leading foots that the back forms are electrically connected respectively, the other end is that the code name that the leading foot of the energy-storage travelling wave tube of being filled the post of by capacitor 6 of C is electrically connected is J with code name behind polarity reversing switch Jd, Js, Jsf and Jdf
1-J
10 Electronic switch 8 form; Described energy-storage travelling wave tube 6 is filled the post of by capacitor; Code name is that the signal I/O pin of the single-chip microcomputer of 7 MCU is that the exit of sampling electronic switch 14 and the capacitor C of Jo and Jp is electrically connected by code name.
Under circuit connection state, sequence number is the J1 of odd number in the electronic switch assembly 5, J3, J5, the end of J7 and J9 respectively with the cell 4 of lithium battery group 2 in D1, D3, D5, D7 and D9 on positive pole (that is negative pole of the positive pole of D1 and D2, D4, D6, D8) be electrically connected, the end that the other end meets back and Jd, Jsf altogether is electrically connected, and the positive pole of the other end of Jd and capacitor C is electrically connected, and the negative pole of the other end of Jsf and capacitor C is electrically connected; Sequence number is the J2 of even number, J4, J6, J8, the end of J10 respectively with the cell 4 of lithium battery group 2 in positive pole (that is negative pole of D1, D3, D5 and D7) and the negative pole of D9 of D2, D4, D6 and D8 be electrically connected, the end that the other end meets back and Jdf, Js altogether is electrically connected, and the negative pole of the other end of Jdf and capacitor C is electrically connected, and the positive pole of the other end of Js and capacitor C is electrically connected; The negative pole of capacitor C is electrically connected by the other end of the Jp in the sampling electronic switch 14 and the signal I/O pin of MCU single-chip microcomputer, and the positive pole of capacitor C is electrically connected by the other end of the Jo in the sampling electronic switch 14 and the signal I/O pin of MCU.
During work,, connect J1, J2, Jd and Jdf earlier, disconnect J1, J2, Jd and Jdf then, connect Jo, Jp capacitor C charging when MCU single-chip microcomputer during to the D1 voltage sample,, MCU is to capacitor C sampling, thereby reaches the purpose to the D1 sampling; During sampling D2 voltage, connect J2, J3, Js and Jsf to capacitor C charging, disconnect J2, J3, Js and Jsf then, connect Jo, Jp, MCU samples to capacitor C, thereby reaches the purpose to the D2 sampling; Other by that analogy.
The method of taking out electric energy from the higher battery of voltage is similar with the method for this cell voltage of sampling, and for example, D8 voltage is higher, then connects J8, J9 and Js, Jsf, just can be with a part of energy storing among the D8 in capacitor C; Equally,, then connect J8, J9 and Js, Jsf equally, just a part of electric energy among the capacitor C can be transferred among the D8 and go if D8 voltage is on the low side.
Control the closed or disconnection of each electronic switch according to the order of sequence by single-chip microcomputer 7, execution detects the voltage sample of each cell 4, and the closed as required respective electronic switch that is electrically connected with energy-storage travelling wave tube 6 leading foots, the unnecessary electric energy in the higher cell of voltage is taken out in execution, making it voltage reduces, and the electric energy that takes out passed on be stored in the energy-storage travelling wave tube 6, electric energy stored in the energy-storage travelling wave tube 6 is transferred in the voltage cell on the low side 4 again, make it boosted voltage, the voltage of each cell 4 (D1-D9) in the lithium battery group 2 is reached unanimity, thereby the voltage of realizing each cell 4 in the lithium battery group 2 is all pressed.The code name that comprises setting in the electronic switch assembly 5 is J1-J10, Jd, Jdf, Js and Jsf and Jo and Jp sampling electronic switch 14 are subjected to 7 controls of MCU single-chip microcomputer respectively, being provided with code name in the lithium battery group 2 as required is 9 cells 4 of D1-D9, and the voltage of each cell 4 can both be sampled by the MCU single-chip microcomputer and all presses processing by the various combination of each electronic switch 8.
In Fig. 3, in lithium battery group of the present utility model, also be equipped with as required in the pressure-equalizing device of each monomer battery voltage and be provided with the voltage conversion circuit 9 of guaranteeing single-chip microcomputer 7 operate as normal and voltage sample control circuit 10, current sample control circuit 11, temperature sampling circuit 12 and temperature sensor 13 with lithium battery charge and discharge protective function.
Claims (5)
1. the pressure-equalizing device of each monomer battery voltage in the lithium battery group, include box body (1), lithium battery group (2) and electric circuit board (3), lithium battery group (2) and electric circuit board (3) all are arranged in the chamber of box body (1), it is characterized in that: lithium battery group (2) is in series by several cells (4), comprise on the electric circuit board (3) and be provided with electronic switch assembly (5), energy-storage travelling wave tube (6) and single-chip microcomputer (7), wherein: described electronic switch assembly (5) is electrically connected with the electrode leading foot of each cell (4) respectively by one group of one end, several electronic switches (8) that the signal I/O pin of the leading foot of the other end and energy-storage travelling wave tube (6) and single-chip microcomputer (7) is electrically connected are formed; Energy-storage travelling wave tube (6) is filled the post of by capacitor or inductor; Comprise on the single-chip microcomputer (7) and be provided with signal I/O pin and control signal output pin.
2. the pressure-equalizing device of each monomer battery voltage is characterized in that the cell (4) in the described lithium battery group (2) is provided with 2 at least as required in the lithium battery group according to claim 1.
3. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 1 is characterized in that the electronic switch (8) in the described electronic switch assembly (5) includes the n that is formed by n cell (4) the series connection back that is arranged in the lithium battery group (2)
+ 1J1--Jn on the individual electrode leading foot
+ 1, be arranged on Jd, Js, Jsf, the Jdf on the polarity leading foot of energy-storage travelling wave tube (6) and be arranged on Jo and Jp on the signal I/O pin of single-chip microcomputer (7).
4. according to the pressure-equalizing device of each monomer battery voltage in claim 1 or the 3 described lithium battery groups, it is characterized in that the J1--Jn in the described electronic switch (8)
+ 1An end be separately positioned on the n that forms by n cell (4) series connection back
+ 1On the individual electrode leading foot, its sequence number is that the end that the other end of the electronic switch (8) of odd number splices Jd, the Jsf on back and the polarity leading foot of energy-storage travelling wave tube (6) mutually and is arranged on the Jo on the signal I/O pin of single-chip microcomputer (7) is electrically connected, and its sequence number is that the other end of the electronic switch (8) of even number splices Jdf, the Js on the polarity leading foot of back and energy-storage travelling wave tube (6) mutually and the Jp that is arranged on the signal I/O pin of single-chip microcomputer (7) is electrically connected.
5. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 1 is characterized in that also being equipped with as required on the described electric circuit board (3) and is provided with voltage conversion circuit (9) and voltage sample and control circuit (10), current sampling circuit (11), and the temperature sampling circuit (12) that is electrically connected of temperature sensor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200758541U CN201146223Y (en) | 2007-11-22 | 2007-11-22 | Pressure-equalizing device for monomer battery voltage of each lithium battery set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200758541U CN201146223Y (en) | 2007-11-22 | 2007-11-22 | Pressure-equalizing device for monomer battery voltage of each lithium battery set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201146223Y true CN201146223Y (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200758541U Expired - Fee Related CN201146223Y (en) | 2007-11-22 | 2007-11-22 | Pressure-equalizing device for monomer battery voltage of each lithium battery set |
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| CN (1) | CN201146223Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938152A (en) * | 2010-09-01 | 2011-01-05 | 华南理工大学 | Power battery pack equalizing circuit and method |
| CN102111003A (en) * | 2011-02-21 | 2011-06-29 | 成都芯源***有限公司 | Novel battery equalization circuit and adjusting method thereof |
| CN103094972A (en) * | 2013-03-04 | 2013-05-08 | 山东润峰集团新能源科技有限公司 | Same-level overflow energy feedback protection board |
| CN103178560A (en) * | 2011-12-22 | 2013-06-26 | 赵恩海 | Circuit for balancing electric quantity of any battery cell in series connection charging battery pack |
| CN103199576A (en) * | 2011-02-21 | 2013-07-10 | 成都芯源***有限公司 | Novel battery equalization circuit and adjusting method thereof |
| CN103872655A (en) * | 2014-03-26 | 2014-06-18 | 杭州万好万家动力电池有限公司 | Charging battery protecting circuit and control method of protecting circuit |
-
2007
- 2007-11-22 CN CNU2007200758541U patent/CN201146223Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938152A (en) * | 2010-09-01 | 2011-01-05 | 华南理工大学 | Power battery pack equalizing circuit and method |
| CN101938152B (en) * | 2010-09-01 | 2012-08-22 | 华南理工大学 | Power battery pack equalizing circuit and method thereof |
| CN102111003A (en) * | 2011-02-21 | 2011-06-29 | 成都芯源***有限公司 | Novel battery equalization circuit and adjusting method thereof |
| CN103199576A (en) * | 2011-02-21 | 2013-07-10 | 成都芯源***有限公司 | Novel battery equalization circuit and adjusting method thereof |
| CN102111003B (en) * | 2011-02-21 | 2013-07-17 | 成都芯源***有限公司 | Novel battery equalization circuit and adjusting method thereof |
| TWI466412B (en) * | 2011-02-21 | 2014-12-21 | Monolithic Power Systems Inc | A novel cell balance circuit and regulating method thereof |
| CN103178560A (en) * | 2011-12-22 | 2013-06-26 | 赵恩海 | Circuit for balancing electric quantity of any battery cell in series connection charging battery pack |
| CN103094972A (en) * | 2013-03-04 | 2013-05-08 | 山东润峰集团新能源科技有限公司 | Same-level overflow energy feedback protection board |
| CN103872655A (en) * | 2014-03-26 | 2014-06-18 | 杭州万好万家动力电池有限公司 | Charging battery protecting circuit and control method of protecting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20111122 |