CN101207295A - Apparatus and method for voltage equalizing of monomer battery voltage in lithium batteries - Google Patents
Apparatus and method for voltage equalizing of monomer battery voltage in lithium batteries Download PDFInfo
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- CN101207295A CN101207295A CNA2007101708120A CN200710170812A CN101207295A CN 101207295 A CN101207295 A CN 101207295A CN A2007101708120 A CNA2007101708120 A CN A2007101708120A CN 200710170812 A CN200710170812 A CN 200710170812A CN 101207295 A CN101207295 A CN 101207295A
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a voltage-equalizing method of the voltage of all single cells in the lithium-cell group and a device thereof, the device comprises a box body, a lithium-cell group and an electrical circuit board that is provided with an electronic switch component, an energy-storing element, a sampling electronic switch and a single chip. The electronic switch component consists of a group of electronic switches with one end respectively communicated with an electrode leading pin that is formed by the serial connection of the single cells, and with the other end communicated with a leading pin of a power-storage element and a signal input/output pin of the single chip. The single chip controls the on-off of the electronic switches, executes the voltage sampling of all single cells, closes the corresponding electronic switches as required, takes out and stores the surplus electric power from the single cell with higher voltage into the power-storage element so as to decrease the voltage of the single cell, and transmits the electric power stored in the power-storage element to the single cell with lower voltage so as to increase the voltage of the single cell; under the automatic control of the single chip, the electric power is automatically transferred as required, the voltage of all single cells in the lithium-cell group becomes equal to realize the voltage equalizing, thereby favoring the energy conversation and improving the service life of the lithium-cell group.
Description
Technical field
The present invention relates to the method and the device thereof in power supply voltage stabilizing technique field, particularly a kind of voltage equalizing of monomer battery voltage in lithium batteries.
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.
Summary of the invention
The objective of the invention is to provide a kind of and 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 method and the device thereof of the voltage equalizing of monomer battery voltage in lithium batteries of lithium battery group useful working life.
The method of voltage equalizing of monomer battery voltage in lithium batteries of the present invention 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, carry out the electric energy in the higher cell of voltage is done the metastatic storage to energy-storage travelling wave tube, make it step-down.Then, 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.
Pressure-equalizing device main body based on each monomer battery voltage in the lithium battery group of the inventive method manufacturing includes box body, lithium battery group and electric circuit board, 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, fixedly comprises on the electric circuit board to be provided with electronic switch assembly, energy-storage travelling wave tube, sampling electronic switch and single-chip microcomputer.Wherein: the electrode leading foot that described electronic switch assembly forms after being connected with cell respectively by one group of one end is electrically connected, the electronic switch that the other end is electrically connected with the leading foot of energy-storage travelling wave tube behind polarity reversing switch is formed, the quantity that cell set in quantity and the lithium battery group is set of electronic switch is relevant, for just needing correspondence that n+1 electronic switch is set on n+1 the electrode leading foot that forms by n cell series connection back, in addition, between the leading foot at the signal I/O pin of single-chip microcomputer and energy-storage travelling wave tube two ends, also be respectively arranged with the sampling electronic switch; Described energy-storage travelling wave tube is filled the post of by capacitor or inductor.
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 invention, 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.
Method and device based on the voltage equalizing of monomer battery voltage in lithium batteries of the present invention 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 lithium battery group short drawback actual life.Therefore, the pressure-equalizing device of each monomer battery voltage in the lithium battery group of the present invention, 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 Acceptable 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 embodiment of the invention;
Fig. 2 is the electrical installation schematic diagram of the embodiment of the invention:
Fig. 3 is the electrical schematics by a kind of lithium battery group manager of embodiment of the invention 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 invention will be further described 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 embodiment of the invention, 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 is made up of the J1-J10 electronic switch 8 that the leading foot of the energy-storage travelling wave tube 6 that one group of one end is 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 filled the post of behind Jd, Js, Jsf and Jdf polarity reversing switch and by capacitor C is electrically connected; Described energy-storage travelling wave tube 6 is filled the post of by capacitor C, is respectively arranged with Jo and Jp sampling electronic switch 14 between the signal I/O pin of its two polarity leading foots and MCU single-chip microcomputer 7.
Under circuit connection state, sequence number is the J1 of odd number in the electronic switch 8, 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 D2, D4, positive pole (that is negative pole of J1, J3, J5 and J7) and the negative pole of D9 of D6, 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 positive pole of capacitor C and negative pole are electrically connected through the signal I/O pin of Jo and Jp sampling electronic switch 14 and MCU single-chip microcomputer 7 respectively.
During work, when MCU single-chip microcomputer during to the D1 voltage sample, connect J1, J2, Jd and Jdf earlier C is charged, disconnect J1, J2 then, connect Jo, Jp, MCU samples to C, reaches the purpose to the D1 sampling; During sampling D2 voltage, connect J2, J3, Js and Jsf it is charged, disconnect J2, J3 then, connect Jo, Jp, MCU samples to C, reaches the purpose to the D2 sampling; Other by that analogy.
The method that electric energy in the battery that voltage is higher takes out 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 8 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, Jsf, each electronic switch 8 of Jo and Jp is subjected to MCU single-chip microcomputer 7 control respectively, and 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, the pressure-equalizing device of each monomer battery voltage is formed in the complete lithium battery group management of charging and discharging device also to be equipped with as required and is 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 the temperature sensor 13 with lithium battery charge and discharge protective function in by lithium battery group of the present invention.
Claims (8)
1. the method for a voltage equalizing of monomer battery voltage in lithium batteries, it is characterized in that 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 leading foot 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, and electric energy stored in the energy-storage travelling wave tube is carried out electric energy to voltage cell on the low side as required replenish, 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.
2. 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) 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), sampling electronic switch (14) 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, the other end is through polarity reversing switch Jd, Js, Jsf, leading foot with energy-storage travelling wave tube (6) behind the Jdf is electrically connected, be provided with sampling electronic switch (14) between the pin of the signal I/O pin of single-chip microcomputer (7) and energy-storage travelling wave tube (6), energy-storage travelling wave tube (6) is filled the post of by capacitor (C) or inductor.
3. 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 2.
4. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 2, it is characterized in that including in the described electronic switch assembly (5) one group of one end and be arranged on n+1 the electrode leading foot that n cell (4) the series connection back in the lithium battery group (2) forms the J1-Jn+1 electronic switch (8) that the end of the other end and polarity reversing switch Jd, Jdf, Js and Jsf is electrically connected.
5. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 2 is characterized in that described sampling electronic switch (14) filled the post of by Jo and Jp between the signal I/O pin of polarity leading foot that is arranged on energy-storage travelling wave tube (6) and single-chip microcomputer (7).
6. according to claim 2, the pressure-equalizing device of each monomer battery voltage in the 4 described lithium battery groups, an end that it is characterized in that J1--Jn+1 electronic switch (8) in the described electronic switch (5) is separately positioned on n+1 the electrode leading foot that is formed by n cell (4) series connection back, its sequence number is that the other end of the electronic switch (8) of odd number passes through Jd after the splicing mutually, Jsf is electrically connected with two polarity leading foots of energy-storage travelling wave tube (6) respectively, and its sequence number is that the other end of the electronic switch (8) of even number passes through Jdf after the splicing mutually, two polarity leading foots of Js and energy-storage travelling wave tube (6) are electrically connected.
7. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 2, a polarity leading foot that it is characterized in that described energy-storage travelling wave tube (6) is electrically connected by a Jo in the sampling electronic switch (14) and a signal I/O pin of single-chip microcomputer (7), and another polarity leading foot is electrically connected by the Jp in the sampling electronic switch (14) and another signal I/O pin of single-chip microcomputer (7).
8. the pressure-equalizing device of each monomer battery voltage in the lithium battery group according to claim 2 is characterized in that also being equipped with as required on the described electric circuit board (3) temperature sampling circuit (12) that is provided with voltage conversion circuit (9), voltage sample control circuit (10), current sample control circuit (11) and is electrically connected with temperature sensor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101708120A CN101207295A (en) | 2007-11-22 | 2007-11-22 | Apparatus and method for voltage equalizing of monomer battery voltage in lithium batteries |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101708120A CN101207295A (en) | 2007-11-22 | 2007-11-22 | Apparatus and method for voltage equalizing of monomer battery voltage in lithium batteries |
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| CN101207295A true CN101207295A (en) | 2008-06-25 |
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| CNA2007101708120A Pending CN101207295A (en) | 2007-11-22 | 2007-11-22 | Apparatus and method for voltage equalizing of monomer battery voltage in lithium batteries |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552479B (en) * | 2009-05-25 | 2010-12-08 | 青岛大学 | Direct-current voltage reducing circuit |
| CN102148521A (en) * | 2011-04-19 | 2011-08-10 | 中国农业大学 | Rechargeable battery pack equalizing device |
| CN104049135A (en) * | 2014-06-24 | 2014-09-17 | 湖南森泰节能科技有限公司 | Device for measuring voltage of series-connection voltage source |
| CN104143843A (en) * | 2013-05-07 | 2014-11-12 | 明苋科技有限公司 | Intelligent vehicle rescue battery device |
| CN104237643A (en) * | 2014-08-28 | 2014-12-24 | 宁德时代新能源科技有限公司 | Method for detecting inner connecting resistor of power battery pack |
-
2007
- 2007-11-22 CN CNA2007101708120A patent/CN101207295A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552479B (en) * | 2009-05-25 | 2010-12-08 | 青岛大学 | Direct-current voltage reducing circuit |
| CN102148521A (en) * | 2011-04-19 | 2011-08-10 | 中国农业大学 | Rechargeable battery pack equalizing device |
| CN104143843A (en) * | 2013-05-07 | 2014-11-12 | 明苋科技有限公司 | Intelligent vehicle rescue battery device |
| CN104049135A (en) * | 2014-06-24 | 2014-09-17 | 湖南森泰节能科技有限公司 | Device for measuring voltage of series-connection voltage source |
| CN104049135B (en) * | 2014-06-24 | 2017-06-13 | 湖南金杯新能源发展有限公司 | Series-type voltage source voltage measuring apparatus |
| CN104237643A (en) * | 2014-08-28 | 2014-12-24 | 宁德时代新能源科技有限公司 | Method for detecting inner connecting resistor of power battery pack |
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Open date: 20080625 |