CN201742141U - Charge and discharge balancing device for serially-connected power storage bodies - Google Patents
Charge and discharge balancing device for serially-connected power storage bodies Download PDFInfo
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- CN201742141U CN201742141U CN2010202660910U CN201020266091U CN201742141U CN 201742141 U CN201742141 U CN 201742141U CN 2010202660910 U CN2010202660910 U CN 2010202660910U CN 201020266091 U CN201020266091 U CN 201020266091U CN 201742141 U CN201742141 U CN 201742141U
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Abstract
The utility model relates to a charge and discharge balancing device for a plurality of serially-connected power storage bodies, belonging to the technical field of lithium ion battery charge and discharge balancing. The charge and discharge balancing device for the serially-connected power storage bodies only needs one switch changing circuit Flyback. An MOS switch tube is used for selecting the power storage bodies needing to act. The whole device adopts the non-energy-consumption type balancing technology so that the ambient operating temperature of the power storage bodies rises in a small amount. The device not only can realize the charge balance and discharge balance between any two power storage bodies, but also has simple structure and good extensibility.
Description
Technical field
The utility model relates to many energy storage body series-connection charge-discharge balancer, belongs to lithium ion battery charge and discharge balancing technical field.
Background technology
Along with the lithium-ion-power cell development of technology, the consistency of battery is greatly improved.However, difference between each monomer still exists, some battery capacity is bigger than normal, some is less than normal, and capacity cell voltage less than normal changes than very fast, reaches the charging cut-ff voltage during charging at first, reach discharge cut-off voltage during discharge at first, along with the increase of cycle-index, capacity battery less than normal can produce the super-charge super-discharge phenomenon, causes the aggravation of battery inconsistency.Be similar to wooden barrel short slab effect, capacity battery less than normal has determined the overall performance of battery pack, and this difficult problem has proposed new challenge to BMS, promptly realizes the charge and discharge balancing between each cell when battery pack is worked.
A good equalizing circuit can be given full play to battery performance, prolongs battery useful life.Equilibrium is divided into energy dissipation type and the equilibrium of non-energy dissipation type.The energy dissipation type is representative with the resistance equalization, and it is simple in structure, realization is convenient, however can cause energy loss, temperature rise big, be not suitable for large current charge; Non-energy dissipation type comprises the switching capacity method, shares transformer method and bidirectional reversible DC/DC.The switching capacity method is simple in structure, with low cost, yet balancing procedure is slow, and efficient is low; It is big to share the loss of transformer method, and the cost height is realized difficulty; Application number is that 200810063915.1 Chinese invention patent application discloses a kind of " three-monomer direct equalizer of series connection accumulation power supply ", this equalizer is taked the equalizing circuit of Boost and two kinds of mode of operation combinations of Flyback, can realize direct and two-way transmission energy between any two monomers in adjacent three series connection accumulation monomers, yet this equalizer can only be realized direct and two-way transmission energy between adjacent three series connection accumulation monomers, and the circuit structure complexity.In sum, all there are various deficiencies in existing balancing technique, realizes realizing between any two monomers of how monomer series-connected battery system that the high efficiency charge and discharge balancing remains a difficult problem that faces in the BMS research and development.
Summary of the invention
The purpose of this utility model provides a kind of many energy storage body series-connection charge-discharge balancer, can not directly carry out the problem that energy shifts in many energy storage body series connection accumulation power supply between any two energy storage bodies to solve.
Another purpose of the present utility model provides a kind of many energy storage body series-connection charge-discharge balancer, to solve in many energy storage body series connection accumulation power supply between any two energy storage bags, can not directly carry out the problem that energy shifts in the energy storage bag between any two energy storage monomers.
For achieving the above object, many energy storage body series-connection charge-discharge balancer of the present utility model comprises switch transformed circuit Flyback and MOS switching tube, the transformer secondary different name end of described switch transformed circuit Flyback connects diode anode, and electric capacity connects diode cathode and transformer secondary end of the same name; The former limit of transformer end of the same name constitutes anode connection terminal via different branch roads by the MOS switching tube respectively with diode cathode, and the former limit of transformer different name end constitutes the negative pole link via different branch roads by the MOS switching tube respectively with transformer secondary end of the same name.
The number of described anode connection terminal or negative pole link is n, and then the number of MOS switching tube is 4n.
Charging and discharging balance device of the present utility model comprises a main balance module, described main balance module comprises main switch translation circuit Flyback and main MOS switching tube, the main transformer secondary different name end of described main switch translation circuit Flyback connects main diode anode, main capacitance connects main diode cathode and main transformer secondary end of the same name, the former limit of main transformer end of the same name constitutes energy storage body anode connection terminal via different branch roads by main MOS switching tube respectively with main diode cathode, and the former limit of main transformer different name end constitutes energy storage body negative pole link via different branch roads by main MOS switching tube respectively with main transformer secondary end of the same name.
Further, also comprise M sub-balance module, each sub-balance module comprises sub-switch transformed circuit Flyback and sub-MOS switching tube, the sub-transformer secondary different name end connexon diode anode of described sub-switch transformed circuit Flyback, sub-electric capacity connexon diode cathode and sub-transformer secondary end of the same name, the former limit of sub-transformer end of the same name constitutes energy storage monomer anode connection terminal via different branch roads respectively with sub-diode cathode, and the former limit of sub-transformer different name end constitutes energy storage monomer negative pole link via different branch roads by main MOS respectively with sub-transformer secondary end of the same name.
Further, the number of described sub-balance module is M, and the number of energy storage monomer anode connection terminal or energy storage monomer negative pole link is N in each sub-balance module, and then needing the number of main MOS switching tube and sub-MOS switching tube altogether is 4M(N+1).
Many energy storage body series-connection charge-discharge balancer of the present utility model only needs a switch transformed circuit Flyback, select the energy storage body that needs action by the MOS switching tube, whole device adopts non-energy consumption type balancing technique to make that the temperature rise of energy storage body running environment is little, device not only can be realized charge balancing and equalization discharge between any two energy storage bodies, and simple in structure, extensibility good.
Another charging and discharging balance device of the present utility model comprises a main balance module and M sub-balance module, each balance module all only needs a switch transformed circuit Flyback, select energy storage monomer or the energy storage bag that needs action by the MOS switching tube, device adopts non-energy consumption type balancing technique to make that the temperature rise of energy storage monomer operational environment is little, whole device not only can be realized charge balancing and equalization discharge between any two energy storage bags, and can realize in the energy storage bag charge balancing and equalization discharge between any two energy storage monomers, the two poles of the earth balanced mode thoroughly realizes the equilibrium between all monomers, and device is simple in structure, extensibility is good.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment one balance module;
Fig. 2 is the circuit theory diagrams that the utility model is implemented two main balance modules;
Fig. 3 is the circuit theory diagrams of embodiment two Pack1 neutron balance modules.
Embodiment
Embodiment one:
The monomer series-connected charging and discharging balance device of many energy storage of the present utility model is an example with four cell B1, B2, B3, B4 series connected battery bag, realizes respectively connect the equilibrium between cell of power brick inside, as shown in Figure 1.Two terminals of Flyback circuit transformer primary coil are defined as former limit end a point of the same name and former limit different name end b point; Two terminals of transformer secondary coil are defined as secondary different name end c point and secondary end d point of the same name; Secondary different name end c point connects the anode of diode D1, and secondary end d point of the same name connects capacitor C 1, and capacitor C 1 an other end is connected with the negative electrode of diode D1 and intersection point is defined as the e point.Former limit end a point of the same name constitutes anode connection terminal via M1, M2, four MOS switching tubes of M4, M6 respectively, to connect cell B1, B2, B3, B4 positive pole (indicating with solid line); Former limit different name end b point constitutes the negative pole link via M3, M5, four metal-oxide-semiconductors of M7, M8 respectively, to connect the negative pole (with dashed lines sign) of cell B1, B2, B3, B4; The e point constitutes anode connection terminal via M9, M11, four MOS switching tubes of M13, M15 respectively, to connect the positive pole (indicating with solid line) of cell B1, B2, B3, B4; Secondary end d point of the same name constitutes the negative pole link via M10, M12, four MOS switching tubes of M14, M16 respectively, to connect the negative pole (with dashed lines sign) of cell B1, B2, B3, B4.Cell has four in the utility model, and corresponding M OS switching tube has 16.
The voltage of supposing B1 in four cells is the highest, and the voltage of B4 is minimum, and then B1 need shift portion of energy to B4.At first make M1, M3, M15 and the conducting of four MOS switching tubes of M16 that links to each other with B1, B4 respectively, the both positive and negative polarity of battery B1 is connected with former limit different name end b point with former limit end a point of the same name by two MOS switching tubes of M1, M3 respectively, the both positive and negative polarity of battery B4 is connected with intersection point e, secondary end d point of the same name by two MOS switching tubes of M15, M16 respectively, at this moment, the each point voltage condition is as follows: a point and d point are for just, b point and c point are for negative, and diode D1 oppositely ends; After disconnecting M1 and M3, the c point is just becoming, the d point become negative, the D1 forward conduction.Secondary shifts energy to battery B4, realizes equilibrium, closes M15 and M16 when following one-period arrives.
If with cell B1, the B2 called after battery B12 as a whole that connects, with cell B3, the B4 called after battery B34 as a whole that connects, then the break-make by control M1, M5, M13 and M16 can realize the balancing energy between B12 and the B34.
Energy storage monomer number in the utility model can be 3,4 or more, and the energy storage monomer can be a cell, also can be the power brick that the cell of similar number is composed in series, and can both realize the equilibrium between all energy storage monomers.
Embodiment two:
Charging and discharging balance device of the present utility model is an example with three power brick Pack1, Pack2, Pack3 series connection, realize the equilibrium between each power brick, and the equilibrium between each cell in the power brick, the cell quantity that comprises in the power brick is not limit, but three power brick must comprise the monomer of similar number, as shown in Figure 2.
This charging and discharging balance device comprises a main balance module and three sub-balance modules, and two terminals of the main transformer primary coil of main switch translation circuit Flyback are defined as former limit end A point of the same name and former limit different name end B point in the main balance module; Two terminals of main transformer secondary coil are defined as secondary different name end C point and secondary end D point of the same name; Secondary different name end C point connects the anode of diode D2, and secondary end D point of the same name connects capacitor C 2, and capacitor C 2 other ends are connected with the negative electrode of diode D2 and intersection point is defined as the E point.Former limit end A point of the same name constitutes energy storage bag anode connection terminal via M17, M18, three MOS switching tubes of M20 respectively, to connect power brick Pack1, Pack2, Pack3 positive pole (indicating with solid line); Former limit different name end B point constitutes energy storage bag negative pole link via M19, M21, three metal-oxide-semiconductors of M22 respectively, to connect the negative pole (with dashed lines sign) of power brick Pack1, Pack2, Pack3; The E point constitutes energy storage bag anode connection terminal via M23, M25, three MOS switching tubes of M27 respectively, to connect the positive pole (indicating with solid line) of power brick Pack1, Pack2, Pack3; Secondary end D point of the same name constitutes energy storage bag negative pole link via M24, M26, three MOS switching tubes of M28 respectively, to connect the negative pole (with dashed lines sign) of power brick Pack1, Pack2, Pack3.
Each power brick is connected to form with corresponding cell by N sub-balance module respectively, with power brick Pack1 for for example shown in Figure 3, sub-balance module comprises sub-switch transformed circuit Flyback and sub-MOS switching tube, the sub-transformer secondary different name end c1 connexon diode D11 anode of described sub-switch transformed circuit Flyback, sub-capacitor C 11 connexon diode D11 negative electrodes and sub-transformer secondary end d of the same name, the former limit of sub-transformer end a of the same name constitutes energy storage monomer anode connection terminal via different branch roads by sub-MOS switching tube respectively with sub-diode D11 negative electrode, link to each other with the positive pole of each cell, the former limit of sub-transformer different name end b constitutes energy storage monomer negative pole link via different branch roads by main MOS switching tube respectively with sub-transformer secondary end d of the same name, links to each other with the negative pole of each cell.
The number of present embodiment power brick is 3, and 4 joint cells are arranged in each power brick, then has 12 joint cells, and needing the number of main MOS switching tube and sub-MOS switching tube altogether is 60.
Can realize between any as shown in Figure 2 two power brick that energy shifts.If the voltage of power brick Pack1 is the highest, the voltage of power brick Pack3 is minimum, and power brick Pack1 need shift energy to Pack3.At first make MOS switching tube M17, M19, M27, M28 conducting, the both positive and negative polarity of power brick Pack1 is connected with A, B respectively, and the both positive and negative polarity of power brick Pack3 is connected with E, D respectively.At this moment, A point and D point are for just, and B point and C point are for negative, and diode D2 oppositely ends, disconnect MOS switching tube M17 and M19 after, C point is just becoming, the D point become negative, the D2 forward conduction, realization power brick Pack1 shifts energy to Pack3.
The utility model is as a kind of two-stage balanced mode, possesses the equilibrium between the equilibrium and power brick between inner each cell of power brick simultaneously, and its balanced efficient height, extensibility be good, be convenient to realize, can realize the equilibrium between each cell.
Claims (5)
1. the series-connection charge-discharge of energy storage body more than kind balancer, it is characterized in that: this device comprises switch transformed circuit Flyback and MOS switching tube, the transformer secondary different name end of described switch transformed circuit Flyback connects diode anode, and electric capacity connects diode cathode and transformer secondary end of the same name; The former limit of transformer end of the same name constitutes anode connection terminal via different branch roads by the MOS switching tube respectively with diode cathode, and the former limit of transformer different name end constitutes the negative pole link via different branch roads by the MOS switching tube respectively with transformer secondary end of the same name.
2. the monomer series-connected charging and discharging balance device of many energy storage according to claim 1 is characterized in that: the number of described anode connection terminal or negative pole link is n, and then the number of MOS switching tube is 4n.
3. charging and discharging balance device, it is characterized in that: this device comprises a main balance module, described main balance module comprises main switch translation circuit Flyback and main MOS switching tube, the main transformer secondary different name end of described main switch translation circuit Flyback connects main diode anode, main capacitance connects main diode cathode and main transformer secondary end of the same name, the former limit of main transformer end of the same name constitutes energy storage body anode connection terminal via different branch roads by main MOS switching tube respectively with main diode cathode, and the former limit of main transformer different name end constitutes energy storage body negative pole link via different branch roads by main MOS switching tube respectively with main transformer secondary end of the same name.
4. charging and discharging balance device according to claim 3, it is characterized in that: also comprise M sub-balance module, each sub-balance module comprises sub-switch transformed circuit Flyback and sub-MOS switching tube, the sub-transformer secondary different name end connexon diode anode of described sub-switch transformed circuit Flyback, sub-electric capacity connexon diode cathode and sub-transformer secondary end of the same name, the former limit of sub-transformer end of the same name constitutes energy storage monomer anode connection terminal via different branch roads respectively with sub-diode cathode, and the former limit of sub-transformer different name end constitutes energy storage monomer negative pole link via different branch roads by main MOS respectively with sub-transformer secondary end of the same name.
5. charging and discharging balance device according to claim 4, it is characterized in that: the number of described sub-balance module is M, the number of energy storage monomer anode connection terminal or energy storage monomer negative pole link is N in each sub-balance module, and then needing the number of main MOS switching tube and sub-MOS switching tube altogether is 4M(N+1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202660910U CN201742141U (en) | 2010-07-21 | 2010-07-21 | Charge and discharge balancing device for serially-connected power storage bodies |
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| CN2010202660910U CN201742141U (en) | 2010-07-21 | 2010-07-21 | Charge and discharge balancing device for serially-connected power storage bodies |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148518A (en) * | 2011-03-18 | 2011-08-10 | 清华大学深圳研究生院 | Secondary battery pack charging and discharging dynamic feedback equalizing device and method |
| CN102856936A (en) * | 2011-06-29 | 2013-01-02 | 北汽福田汽车股份有限公司 | Device for balancing power batteries |
| CN103066633A (en) * | 2011-10-18 | 2013-04-24 | 丁景信 | Power management system |
| CN103117572A (en) * | 2013-01-28 | 2013-05-22 | 合肥创源车辆控制技术有限公司 | System for realizing remote free flying two-way nondestructive balance through one-way transformer |
| CN104578322A (en) * | 2015-01-30 | 2015-04-29 | 天津工业大学 | Battery pack energy balance structure and implementation method thereof |
| CN104882942A (en) * | 2015-06-15 | 2015-09-02 | 王凤成 | System for controlling internal equalization of modularized lithium battery and equalization among modules |
| CN107979303A (en) * | 2016-10-23 | 2018-05-01 | 罗正兰 | AC-DC invertible matrix circuits |
| CN109245211A (en) * | 2018-09-26 | 2019-01-18 | 合肥工业大学 | A kind of two-stage circuit of battery pack balancing based on Flyback converter |
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2010
- 2010-07-21 CN CN2010202660910U patent/CN201742141U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148518A (en) * | 2011-03-18 | 2011-08-10 | 清华大学深圳研究生院 | Secondary battery pack charging and discharging dynamic feedback equalizing device and method |
| CN102148518B (en) * | 2011-03-18 | 2013-06-26 | 清华大学深圳研究生院 | Secondary battery pack charging and discharging dynamic feedback equalizing device and method |
| CN102856936A (en) * | 2011-06-29 | 2013-01-02 | 北汽福田汽车股份有限公司 | Device for balancing power batteries |
| CN102856936B (en) * | 2011-06-29 | 2015-01-14 | 北汽福田汽车股份有限公司 | Device for balancing power batteries |
| CN103066633A (en) * | 2011-10-18 | 2013-04-24 | 丁景信 | Power management system |
| CN103066633B (en) * | 2011-10-18 | 2015-11-18 | 丁景信 | Power management system |
| CN103117572A (en) * | 2013-01-28 | 2013-05-22 | 合肥创源车辆控制技术有限公司 | System for realizing remote free flying two-way nondestructive balance through one-way transformer |
| CN104578322A (en) * | 2015-01-30 | 2015-04-29 | 天津工业大学 | Battery pack energy balance structure and implementation method thereof |
| CN104882942A (en) * | 2015-06-15 | 2015-09-02 | 王凤成 | System for controlling internal equalization of modularized lithium battery and equalization among modules |
| CN107979303A (en) * | 2016-10-23 | 2018-05-01 | 罗正兰 | AC-DC invertible matrix circuits |
| CN107979303B (en) * | 2016-10-23 | 2021-04-09 | 北京华隆浩宏机电工程有限公司 | AC-DC reversible matrix circuit |
| CN109245211A (en) * | 2018-09-26 | 2019-01-18 | 合肥工业大学 | A kind of two-stage circuit of battery pack balancing based on Flyback converter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20150721 |
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| EXPY | Termination of patent right or utility model |