CN103117577A - Energy balance circuit for battery pack of electric vehicle - Google Patents
Energy balance circuit for battery pack of electric vehicle Download PDFInfo
- Publication number
- CN103117577A CN103117577A CN2013100430077A CN201310043007A CN103117577A CN 103117577 A CN103117577 A CN 103117577A CN 2013100430077 A CN2013100430077 A CN 2013100430077A CN 201310043007 A CN201310043007 A CN 201310043007A CN 103117577 A CN103117577 A CN 103117577A
- Authority
- CN
- China
- Prior art keywords
- circuit
- bus
- secondary coil
- cell
- flyback transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to an energy balance circuit for a battery pack of an electric vehicle. The circuit comprises a balance controller, a plurality of balance sub-circuits and a bus for connecting the balance sub-circuits, wherein each balance sub-circuit is arranged on each battery unit, is connected with the balance controller and comprises an isolated two-way flyback transformer and an electronic switch; the two ends of a primary coil of the isolated two-way flyback transformer are respectively connected with an anode and a cathode of the bus; the two ends of a secondary coil of the isolated two-way flyback transformer are respectively connected with an anode and a cathode of a single battery; one electronic switch is connected in series between the cathode of the single battery and the secondary coil; and one electronic switch is connected in series between the cathode of the bus and the primary coil. By the energy balance circuit for the battery pack of the electric vehicle, the consistency of the battery pack is improved in the shortest time, so that the service life of the battery pack is prolonged; and the circuit has the characteristics of obvious balance effect, wide application range and the like.
Description
Technical field
The present invention relates to a kind of circuit of battery pack balancing, relate in particular to a kind of batteries of electric automobile group balancing energy circuit.
Background technology
The batteries of electric automobile group adopts series system to connect and uses, there are differences because the reasons such as production technology cause each cell, in the process that battery pack is discharged and recharged, will inevitably enlarge this species diversity, during charging, phenomenon can appear overcharging in the battery of the little poor performance of capacity; During discharge, the battery of the little poor performance of capacity had again puts phenomenon; The battery capacity utilance can be more and more lower, and if things go on like this, this vicious circle process will speed up the damage of battery.Especially more easily damage battery when high-power use, only have by battery management and safeguard just and can increase the service life.
In order to reduce the battery inconsistency of series battery, must carry out equilibrium to battery pack in battery charge and discharge process controls, balanced control can be divided into balanced 2 kinds of dissipative equalization and non-dissipative type: the equal method of dissipative type is controlled simple, but has energy loss; The control circuit that discharges and recharges the bidirectional equalization method in the non-dissipative type equilibrium is too complicated and be not easy to realize.Electric automobile in use, accumulator cell charging and discharging is comparatively frequent, charging and discharging currents is larger, and requires the charging interval short.
In sum, all there is deficiency separately in existing various balancing techniques, and portfolio effect is relatively poor, are difficult to improve in the short period of time the consistency of battery pack, thereby are not suitable for the electric vehicle battery system that the requirement time for balance is short, energy loss is little.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of successful, the short batteries of electric automobile group balancing energy circuit of time for balance.
For achieving the above object, technical scheme of the present invention is:
a kind of batteries of electric automobile group balancing energy circuit, described battery pack is made of two above battery unit series connection, described battery unit is composed in series by a joint cell or the two above cells of joint, described equalizing circuit comprises balance controller, a plurality of balanced electronic circuits, the bus that connects each balanced electronic circuit, be provided with a balanced electronic circuit on each battery unit, described balanced electronic circuit is connected with balance controller respectively, described balanced electronic circuit comprises that an isolation type bidirectional flyback transformer and electronic switch form, described isolation type bidirectional flyback transformer primary coil two ends are connected with the both positive and negative polarity of bus respectively, isolation type bidirectional flyback transformer secondary coil two ends are connected with the cell both positive and negative polarity respectively, the end that the end that primary coil is connected with the bus negative pole and secondary coil are connected with positive source is Same Name of Ends each other, be in series with an electronic switch between cell negative pole and secondary coil, also be in series with an electronic switch between bus negative pole and primary coil.Preferably, described isolation type bidirectional flyback transformer secondary coil is connected with each cell both positive and negative polarity in battery unit respectively by gating switch, and described electronic switch is between gating switch and secondary coil.Preferably, described electronic switch is N-channel MOS pipe switch, diode of reverse parallel connection between its drain electrode and source electrode, and grid connects drive circuit, and described drive circuit connects balance controller.
Batteries of electric automobile group balancing energy circuit advantage of the present invention is as follows:
(1) belong to the non-dissipative type equilibrium, control the drive circuit of metal-oxide-semiconductor switch by balance controller, transformer primary side winding and secondary winding energy are shifted, realize that electric energy shifts from low electric weight one side of high electric weight one side direction; And realize transformer secondary winding respectively at each cell conducting in battery unit by multi-channel gating switch, realize the energy of battery transfer arbitrarily between any two battery units;
(2) take the mode of common bus to carry out balanced management between transformer, simplified circuit structure, conserve space and cost, simultaneously bus have that good electric energy collects, distribution and transfer capability, make the transfer of electric energy between each battery unit more efficient, quick;
(3) this circuit has realized improving in the shortest time consistency of battery pack, thereby has extended the useful life of battery pack, has the characteristics such as portfolio effect is obvious, applied range.
Description of drawings
Fig. 1 is the circuit block diagram of batteries of electric automobile group balancing energy circuit of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the present invention the first balanced electronic circuit;
Fig. 3 is the circuit diagram of the embodiment of the present invention the second balanced electronic circuit.
Embodiment
Further describe the present invention below in conjunction with drawings and Examples.
as Figure 1-3, batteries of electric automobile group balancing energy circuit of the present invention, described battery pack is made of two above battery units, described battery unit is composed in series by six joint cells, described equalizing circuit comprises balance controller, four balanced electronic circuits, the bus that connects each balanced electronic circuit, be provided with a balanced electronic circuit on each battery unit, described balanced electronic circuit is connected with balance controller respectively, described balanced electronic circuit comprises an isolation type bidirectional flyback transformer, described isolation type bidirectional flyback transformer primary coil two ends are connected with the both positive and negative polarity of bus respectively, isolation type bidirectional flyback transformer secondary coil two ends are connected with the cell both positive and negative polarity respectively, the end that the end that primary coil is connected with the bus negative pole and secondary coil are connected with positive source is Same Name of Ends each other, be in series with an electronic switch between cell negative pole and secondary coil, also be in series with an electronic switch between bus negative pole and primary coil.Isolation type bidirectional flyback transformer secondary coil is connected with each cell both positive and negative polarity in battery unit respectively by gating switch, and described electronic switch is between gating switch and secondary coil.Electronic switch is N-channel MOS pipe switch, diode of reverse parallel connection between its drain electrode and source electrode, and grid connects drive circuit, and described drive circuit connects balance controller.
Batteries of electric automobile group balancing energy circuit of the present invention is through balance controller, each cell balancing state to be judged, and according to the equilibrium state that obtains, cell between each battery unit is carried out charge balancing or equalization discharge, the course of work of this circuit is as described below:
Suppose that a certain moment BAT1 cell voltage is too high, and the BAT12 cell voltage is too low, balance controller is to the BAT1 equalization discharge, the BAT12 charge balancing, and the implementation status of batteries of electric automobile group balancing energy circuit of the present invention is as follows:
1, the balanced electronic circuit operation of BAT1 is as follows: balance controller is controlled S1A and the S1B conducting in gating switch K1-2, S1C and S1D conducting, balance controller is controlled metal-oxide-semiconductor drive circuit output pulse, control Q1A, Q1B conducting, by transformer T1, the excess energy of BAT1 is transferred on bus, until balance controller detects BAT1 when need not equilibrium, turn-off S1A and S1B, S1C and S1D in Q1A, Q1B and gating switch K1-2;
2, balance controller is controlled metal-oxide-semiconductor drive circuit output pulse, control Q2A, Q2B conducting, balance controller is controlled S12A and the S12B conducting in gating switch K11-12, S12C and S12D conducting, bus charges to the BAT12 battery by transformer T2, until balance controller detects BAT12 when need not equilibrium, turn-off S12A and S12B, S12C and S12D in Q2A, Q2B and gating switch K11-12.
Bus has the effect that collects, distributes and transmit electric energy, adopts bus to connect between the former limit winding of each transformer, and the secondary winding connects each cell by gating switch, has so just realized that the energy between bus and each unit cell battery shifts.Under the control of balance controller, any joint cell can be transported to bus with unnecessary electric weight, and bus also can charge to the lower cell of other unit electric weight.In other words, bus is equivalent to an electric weight terminal, and each saves cell and all can carry out electric weight with bus and shift, thereby realizes that any batteries transfers to electric weight in other unit cell battery.
In sum, this batteries of electric automobile group balancing energy circuit structure is simple, euqalizing current is large, time for balance is short, can complete fast the balancing energy between battery, guarantees the consistency of cell in battery pack, postpones the useful life of battery pack.
Claims (3)
1. batteries of electric automobile group balancing energy circuit, described battery pack is made of two above battery unit series connection, described battery unit is composed in series by a joint cell or the two above cells of joint, it is characterized in that: described equalizing circuit comprises balance controller, a plurality of balanced electronic circuits, the bus that connects each balanced electronic circuit, be provided with a balanced electronic circuit on each battery unit, described balanced electronic circuit is connected with balance controller respectively, described balanced electronic circuit comprises that an isolation type bidirectional flyback transformer and electronic switch form, described isolation type bidirectional flyback transformer primary coil two ends are connected with the both positive and negative polarity of bus respectively, isolation type bidirectional flyback transformer secondary coil two ends are connected with the cell both positive and negative polarity respectively, the end that the end that primary coil is connected with the bus negative pole and secondary coil are connected with positive source is Same Name of Ends each other, be in series with an electronic switch between cell negative pole and secondary coil, also be in series with an electronic switch between bus negative pole and primary coil.
2. batteries of electric automobile group balancing energy circuit according to claim 1, it is characterized in that: described isolation type bidirectional flyback transformer secondary coil is connected with each cell both positive and negative polarity in battery unit respectively by gating switch, and described electronic switch is between gating switch and secondary coil.
3. batteries of electric automobile group balancing energy circuit according to claim 1, it is characterized in that: described electronic switch is N-channel MOS pipe switch, diode of reverse parallel connection between its drain electrode and source electrode, grid connects drive circuit, and described drive circuit connects balance controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043007.7A CN103117577B (en) | 2013-02-04 | 2013-02-04 | Energy balance circuit for battery pack of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043007.7A CN103117577B (en) | 2013-02-04 | 2013-02-04 | Energy balance circuit for battery pack of electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103117577A true CN103117577A (en) | 2013-05-22 |
| CN103117577B CN103117577B (en) | 2015-10-28 |
Family
ID=48415880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310043007.7A Active CN103117577B (en) | 2013-02-04 | 2013-02-04 | Energy balance circuit for battery pack of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103117577B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682483A (en) * | 2013-12-03 | 2014-03-26 | 义乌市运拓光电科技有限公司 | Lithium battery |
| CN103986202A (en) * | 2014-03-31 | 2014-08-13 | 国家电网公司 | Intelligent power equalization type electric vehicle |
| WO2016119608A1 (en) * | 2015-01-28 | 2016-08-04 | 杭州高特电子设备有限公司 | Isolated bidirectional constant-current maintenance system based on power supply source of shared device |
| CN106849266A (en) * | 2017-03-28 | 2017-06-13 | 合肥工业大学 | A kind of equalizing circuit for charging and discharging lithium battery energy management |
| WO2017113340A1 (en) * | 2015-12-31 | 2017-07-06 | SZ DJI Technology Co., Ltd. | Method and system for balancing battery assembly |
| CN106981993A (en) * | 2017-05-19 | 2017-07-25 | 深圳市奥耐电气技术有限公司 | A kind of efficiently two-way DC DC converters |
| CN107147324A (en) * | 2017-05-19 | 2017-09-08 | 深圳市奥耐电气技术有限公司 | One kind efficiently isolates two-way AC DC converters |
| CN108322057A (en) * | 2018-04-17 | 2018-07-24 | 江苏联能电子技术有限公司 | A kind of two-way circuit topological structure for piezoelectric pile driving |
| CN108923508A (en) * | 2018-10-10 | 2018-11-30 | 北京动力京工科技有限公司 | A kind of active equalization of battery device containing flyback converter |
| CN109004696A (en) * | 2018-04-18 | 2018-12-14 | 国家电网公司 | A kind of substation battery multifunction control system and its control method |
| CN109950949A (en) * | 2019-03-14 | 2019-06-28 | 上海电气集团股份有限公司 | A kind of three-level active equalization circuit of energy storage lithium battery group |
| CN110011365A (en) * | 2018-01-05 | 2019-07-12 | 杭州科工电子科技有限公司 | The equal balance system of energy-storage battery group |
| CN111391708A (en) * | 2020-03-26 | 2020-07-10 | 江西优特汽车技术有限公司 | Method for reducing voltage difference of equalization circuit and improving equalization efficiency |
| CN111969673A (en) * | 2020-07-20 | 2020-11-20 | 武汉理工大学 | Active equalization system and method for lithium ion power battery pack |
| CN113224816A (en) * | 2021-05-17 | 2021-08-06 | 上海交通大学 | Isolation interface, gating network, protection and equalization circuit and method for series battery pack |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090302807A1 (en) * | 2008-06-05 | 2009-12-10 | Bayerische Motoren Werke Aktiengesellschaft | Motor Vehicle |
| CN102208821A (en) * | 2010-03-31 | 2011-10-05 | 凹凸电子（武汉）有限公司 | Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack |
| CN202474920U (en) * | 2012-01-18 | 2012-10-03 | 杭州高特电子设备有限公司 | Cell-pack equalization circuit combine-used with self-bring cell of electric automobile |
| CN102832653A (en) * | 2011-12-29 | 2012-12-19 | 中航锂电（洛阳）有限公司 | Active equalization circuit for multi-monomer series battery |
| CN102904317A (en) * | 2012-11-02 | 2013-01-30 | 上海同异动力科技有限公司 | Bidirectional electric energy transfer circuit |
| CN203071622U (en) * | 2013-02-04 | 2013-07-17 | 杭州高特电子设备有限公司 | Battery pack energy balancing circuit of electric vehicle |
-
2013
- 2013-02-04 CN CN201310043007.7A patent/CN103117577B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090302807A1 (en) * | 2008-06-05 | 2009-12-10 | Bayerische Motoren Werke Aktiengesellschaft | Motor Vehicle |
| CN102208821A (en) * | 2010-03-31 | 2011-10-05 | 凹凸电子（武汉）有限公司 | Balancing system for a battery pack, balancing circuit and method for controlling balancing of a battery pack |
| CN102832653A (en) * | 2011-12-29 | 2012-12-19 | 中航锂电（洛阳）有限公司 | Active equalization circuit for multi-monomer series battery |
| CN202474920U (en) * | 2012-01-18 | 2012-10-03 | 杭州高特电子设备有限公司 | Cell-pack equalization circuit combine-used with self-bring cell of electric automobile |
| CN102904317A (en) * | 2012-11-02 | 2013-01-30 | 上海同异动力科技有限公司 | Bidirectional electric energy transfer circuit |
| CN203071622U (en) * | 2013-02-04 | 2013-07-17 | 杭州高特电子设备有限公司 | Battery pack energy balancing circuit of electric vehicle |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682483A (en) * | 2013-12-03 | 2014-03-26 | 义乌市运拓光电科技有限公司 | Lithium battery |
| CN103986202A (en) * | 2014-03-31 | 2014-08-13 | 国家电网公司 | Intelligent power equalization type electric vehicle |
| WO2016119608A1 (en) * | 2015-01-28 | 2016-08-04 | 杭州高特电子设备有限公司 | Isolated bidirectional constant-current maintenance system based on power supply source of shared device |
| US10374445B2 (en) | 2015-01-28 | 2019-08-06 | Hangzhou Gold Electronic Equipment Inc., Ltd. | Isolated bidirectional constant-current maintenance system based on power supply source of shared device |
| WO2017113340A1 (en) * | 2015-12-31 | 2017-07-06 | SZ DJI Technology Co., Ltd. | Method and system for balancing battery assembly |
| US10790678B2 (en) | 2015-12-31 | 2020-09-29 | SZ DJI Technology Co., Ltd. | Method and system for balancing a battery assembly |
| CN106849266A (en) * | 2017-03-28 | 2017-06-13 | 合肥工业大学 | A kind of equalizing circuit for charging and discharging lithium battery energy management |
| CN106849266B (en) * | 2017-03-28 | 2018-03-27 | 合肥工业大学 | A kind of equalizing circuit for charging and discharging lithium battery energy management |
| CN106981993A (en) * | 2017-05-19 | 2017-07-25 | 深圳市奥耐电气技术有限公司 | A kind of efficiently two-way DC DC converters |
| CN107147324A (en) * | 2017-05-19 | 2017-09-08 | 深圳市奥耐电气技术有限公司 | One kind efficiently isolates two-way AC DC converters |
| CN110011365A (en) * | 2018-01-05 | 2019-07-12 | 杭州科工电子科技有限公司 | The equal balance system of energy-storage battery group |
| CN108322057A (en) * | 2018-04-17 | 2018-07-24 | 江苏联能电子技术有限公司 | A kind of two-way circuit topological structure for piezoelectric pile driving |
| CN109004696A (en) * | 2018-04-18 | 2018-12-14 | 国家电网公司 | A kind of substation battery multifunction control system and its control method |
| CN108923508A (en) * | 2018-10-10 | 2018-11-30 | 北京动力京工科技有限公司 | A kind of active equalization of battery device containing flyback converter |
| CN109950949A (en) * | 2019-03-14 | 2019-06-28 | 上海电气集团股份有限公司 | A kind of three-level active equalization circuit of energy storage lithium battery group |
| CN111391708A (en) * | 2020-03-26 | 2020-07-10 | 江西优特汽车技术有限公司 | Method for reducing voltage difference of equalization circuit and improving equalization efficiency |
| CN111969673A (en) * | 2020-07-20 | 2020-11-20 | 武汉理工大学 | Active equalization system and method for lithium ion power battery pack |
| CN113224816A (en) * | 2021-05-17 | 2021-08-06 | 上海交通大学 | Isolation interface, gating network, protection and equalization circuit and method for series battery pack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103117577B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103117577B (en) | Energy balance circuit for battery pack of electric vehicle | |
| CN106532852B (en) | Battery pack equalization circuit based on LC series energy storage | |
| CN101740827B (en) | Active equalization system of lithium-ion power battery and equalization method thereof | |
| CN102368628B (en) | Intelligent balance device of power batteries of electric vehicle | |
| CN106712191B (en) | Battery pack equalization circuit and method based on external energy storage unit and LC quasi-resonance | |
| CN108134414B (en) | Modular equalization circuit and equalization mode thereof | |
| CN107968446B (en) | Distributed battery pack power supply system and charge-discharge control method | |
| CN103956799B (en) | A kind of circuit of battery pack balancing based on many secondary transformer and its implementation | |
| CN103023106B (en) | One-machine-and-multiple-charging electrombile charging system and method | |
| CN102593893A (en) | System for realizing balanced discharging of battery sets | |
| CN105140998A (en) | Bidirectional lossless equalization circuit of series battery pack based on inductive energy storage | |
| CN202564995U (en) | Multichannel battery pack charge-discharge control device | |
| CN203071622U (en) | Battery pack energy balancing circuit of electric vehicle | |
| CN102891519A (en) | Equalization circuit of battery pack | |
| CN103023105B (en) | Electric motor car charging system with standby switching and charging method | |
| CN204271706U (en) | A kind of battery module voltages balancer based on AC bus | |
| CN203589787U (en) | Equalization circuit for lithium battery pack | |
| CN103066642B (en) | Energy balance control system in a kind of battery pack between cell | |
| CN202888901U (en) | Equalization circuit for battery pack | |
| CN203827031U (en) | Battery group equalization circuit based on multi-secondary transformer | |
| CN203014420U (en) | Battery management system with single battery energy balance control function | |
| CN103986216A (en) | Vehicle-mounted power Li-ion battery pack active balance system | |
| CN210926208U (en) | Bidirectional equalization system for series battery pack | |
| CN207819499U (en) | It is main passively to combine buck battery equalizing circuit | |
| CN202978315U (en) | Battery energy equalization circuit, battery energy equalization device and energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Xihu District Yi Lok Road Hangzhou city Zhejiang province 310012 No. 223 Yinjiang Technology Industrial Park B building 6 floor Patentee after: Hangzhou high special electronic equipment Limited by Share Ltd Address before: Xihu District Yi Lok Road Hangzhou city Zhejiang province 310012 No. 223 Yinjiang Technology Industrial Park B building 6 floor Patentee before: Gaote Electronic Apparatus Co., Ltd., Hangzhou |