CN102447292A - Battery/capacitor bank current sharing control circuit - Google Patents
Battery/capacitor bank current sharing control circuit Download PDFInfo
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- CN102447292A CN102447292A CN2012100047403A CN201210004740A CN102447292A CN 102447292 A CN102447292 A CN 102447292A CN 2012100047403 A CN2012100047403 A CN 2012100047403A CN 201210004740 A CN201210004740 A CN 201210004740A CN 102447292 A CN102447292 A CN 102447292A
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Abstract
The invention discloses a battery/capacitor bank current sharing control unit. The battery/capacitor bank is composed of at least one monomer which are connected in parallel, and the battery/capacitor bank also comprises a controller, switches and current samplers, wherein quantity of the switches is not less than the quantity of the monomers, the power terminal of each switch is connected with the monomers in series while a control electrode of each switch is connected with the controller, the switches and switching duty ratio are controlled by virtue of the control electrodes; the quantity of the current samplers is the same with the quantity of the monomers, and the current samplers are connected with the monomers in one-to-one correspondence, and a signal terminal of each current sampler is connected with the controller, and action of each switch is controlled according to current. The circuit structure can avoid the phenomenon that currents of the monomers are unbalanced in a charging or discharging process owning to difference of capacity or internal equivalent impedance, the phenomenon that the whole battery/capacitor bank is disabled as one monomer is disabled when multiple monomers are connected in parallel can be avoided, and the phenomenon that impulse current is overhigh in the charging and discharging process can be inhibited, thus service life of the battery/capacitor bank is prolonged.
Description
Technical field
The present invention relates to the method that a kind of cell electric capacity is assembled into series connection with the parallel connection of battery capacitor group, be particularly useful for many cells and capacitances in series and the large-sized battery pack of parallel connection and the series connection and the parallel-connection structure of capacitance group.
Background technology
The also linked method of battery all is the direct parallel connection through battery cell in the current battery group, and this type of attachment exists following problem:
(1) because the internal resistance of battery cell and the difference of capacity cause battery in charging and discharging process, to exist serious inequality to press uneven flow phenomenon;
(2) the parallelly connected uneven flow problem that causes owing to the individual difference of battery causes some batteries to be operated in overload always, thereby has quickened the decay in battery cell life-span;
(3) if a battery short circuit, the module of whole parallel connection will all lose efficacy.
Capacitance group also is that some electric capacity monomers are carried out parallel connection usually, therefore exists the problems referred to above equally.
Based on this, the inventor improves the parallel form of battery/electric capacity monomer in existing battery pack and the capacitance group, and this case produces thus.
Summary of the invention
The object of the invention; Be to provide a kind of battery/capacitance group equalizing control circuit; It can evade the current unevenness weighing apparatus problem in the charge or discharge process that monomer causes owing to the difference on capacity or the inner equiva lent impedance; Evade entire cell/capacitance group inefficacy of when a plurality of monomers are parallelly connected, lost efficacy and causing, can be suppressed at the excessive problem of impulse current in charging and the discharge process simultaneously through control to tandem tap owing to certain monomer, thus the life-span of raising battery/capacitance group.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of battery/capacitance group equalizing control circuit; Said battery/capacitance group forms by at least one monomer is parallel with one another, also comprises controller, switch and current sampler, wherein; The quantity of switch is no less than the quantity of monomer; The power terminal of said switch and monomer series-connected, and the control utmost point of switch connects controller, through controlling the control that the utmost point carries out switch and opens duty ratio; The quantity of current sampler is identical with the quantity of monomer, and connects with monomer is corresponding one by one, and the signal terminal of current sampler is connected with controller, according to the action of current-controlled switch.
Above-mentioned monomer is that battery cell, electric capacity monomer or battery cell mix the mixing module that is connected with the electric capacity monomer.
Above-mentioned battery cell is single battery, at least two batteries in series or in parallel with each other or the power brick of mixing connection.
Above-mentioned electric capacity monomer is single electric capacity, at least two electric capacity in series or in parallel with each other or mixes the electric capacity bag that connects.
Above-mentioned switch is mechanical switch or electronic switch.
Suppress the impulse current excessive problem of battery/electric capacity in charging and discharge process through control to tandem tap.
Above-mentioned switch can be operated in direct conducting state, also can be operated in the closed loop adjustment duty ratio state of being controlled by the control system of power brick or battery cell.
Can package through parallel connection and the series connection of carrying out more massive power brick behind the series connection power switch by the power brick after a plurality of battery cell parallel connections.
External control system can be optimized processing according to the difference of battery cell and the analysis of sampled signal, adopts different driving and control strategy to prolong battery or electric capacity life-span to reach best charging and discharging state to different monomers.
The switch that is connected in the monomer can be operated in following three kinds of operating states: on off state, closed-loop adjustment particular duty cycle state and linear regulation state.
After adopting such scheme; When the present invention has thoroughly changed tradition to the parallel connection of battery or electric capacity to the conforming dependence of monomer; Fundamentally solved the persistent ailment that causes the direct batteries in parallel connection of not current-sharing to damage because of the battery consistency difference; Thereby each batteries can both and be discharged its maximum capacity storage, thereby improved the utilization ratio of battery or capacitor system.In addition; If some battery infringements; Switch is peeled off it automatically from system; Thereby greatly improve the reliability of battery pack, can reduce in battery recharge and the discharge process surge current significantly to the impact of battery and electric capacity through control simultaneously, improve the reliability of system tandem tap.Through can control the equiva lent impedance of different batteries or electric capacity effectively to the switch of inside battery; Battery can be connected in parallel several batteries and carry out the current-sharing of cell or electric capacity easily; Thereby greatly reduce conforming dependence, the reliability of elevator system to battery.
Description of drawings
Fig. 1 is the sketch map of first embodiment of the invention;
Fig. 2 is the sketch map of second embodiment of the invention;
Fig. 3 is the sketch map of third embodiment of the invention;
Fig. 4 is the sketch map of fourth embodiment of the invention.
Embodiment
Below will combine accompanying drawing, technical scheme of the present invention will be elaborated.
The present invention provides a kind of battery/capacitance group equalizing control circuit; Said battery/capacitance group forms by at least one monomer is parallel with one another; Wherein, said monomer can be a battery cell, and this battery cell can be a single battery; Also can be to connect or be formed in parallel, or even mix the power brick that is formed by connecting through series connection and parallel connection on a plurality of batteries by at least two batteries; Monomer can be the electric capacity monomer, and said monomer electric capacity can be single electric capacity, also can be by at least two capacitances in series or is formed in parallel, or mix the electric capacity bag that is formed by connecting a plurality of electric capacity through series connection and parallel connection; Said monomer can also be to mix the mixing module that is formed by connecting aforementioned battery cell and electric capacity monomer through series connection and parallel connection.
Improvement of the present invention is: said equalizing control circuit also comprises controller, switch and current sampler; The quantity of said switch is no less than the quantity of monomer in battery/capacitance group; Said switch can be a mechanical switch, also can be electronic switch, like power semiconductor components such as MOSFET, JEFET, triode, IGBT or controllable silicons; Aforementioned switches and monomer series-connected, each monomer one or more switches of can connecting; The control utmost point of each switch connects controller respectively, controls the control that utmost point carries out switch and opens duty ratio through it; And the quantity of current sampler is identical with the quantity of monomer in battery/capacitance group, connects with monomer is corresponding one by one, and wherein, the signal of current sampler is connected with controller through signal terminal.
Cooperating shown in Figure 1ly, is the first embodiment of the present invention, and it is the structure chart of the monomer that constitutes with single battery; Wherein E1 is a battery; The positive pole of battery E1 links to each other with the lead terminal BAR+ of battery pack, and negative pole links to each other with a power terminal of switch S 1, and the control terminal of switch S 1 links to each other with PWM1; The input of current sampler CS1 links to each other with another power terminal of switch S 1, and lead-out terminal links to each other with the lead terminal BAR-of battery pack, and the signal terminal of said current sampler CS1 links to each other with the CS1 control terminal.
Controller outside is controlled the voltage at battery cell two ends through the driving pulse of control PWM1, thereby reaches the conforming purpose of accurate control battery pack voltage.Simultaneously; Controller outside comes monitoring flow to cross the electric current of battery E1 through the voltage of sampling CS1; In case it is too high to flow through the electric current of battery E1, controller will recently reach the purpose of regulating cell E1 electric current through the driving duty of adjustment PWM1, thereby realize the control to battery E1 charging and discharging current.
With reference to Fig. 2; Be the second embodiment of the present invention; It is the structure chart with a plurality of battery cells formation battery pack parallel with one another, and wherein E2, E3, E4 are battery, and the positive pole of battery E2, E3, E4 links to each other with the lead terminal BAR+ of battery pack respectively; Negative pole links to each other with the power terminal of switch S 2, S3, S4 respectively, and the control terminal of switch S 2, S3, S4 links to each other with PWM2, PWM3, PWM4 respectively; The input of current sampler CS2, CS3, CS4 links to each other with another power terminal of switch S 2, S3, S4 respectively; Lead-out terminal then links to each other with the lead terminal BAR-of battery pack, and the signal terminal of current sampler CS2, CS3, CS4 links to each other with corresponding controling end of controller U1 respectively.U1 is the battery pack master controller of being made up of control chips such as DSP, MCU, CPU.
Controller outside U1 comes to control respectively the voltage at each monomer two ends through the driving pulse of control PWM output channel, thereby reaches the conforming purpose of accurate control battery pack voltage.Simultaneously; Controller outside U1 comes monitoring flow to cross the electric current of each battery through the current signal of sample rate current sampler; In case it is too high to flow through the electric current of each battery; Controller will recently reach the purpose of regulating each battery current through the driving duty of adjustment PWM, thereby realize the charging of each battery and the control of discharging current.
With reference to Fig. 3; Be the third embodiment of the present invention; It is the structure chart with a plurality of electric capacity monomers formation capacitance group parallel with one another, and wherein C2, C3, C4 are electric capacity, and the positive pole of capacitor C 2, C3, C4 links to each other with the lead terminal BAR+ of capacitance group; Negative pole links to each other with the power terminal of switch S 2, S3, S4 respectively, and the control terminal of switch S 2, S3, S4 links to each other with PWM2, PWM3, PWM4 respectively; The input of current sampler CS2, CS3, CS4 links to each other with another power terminal of switch S 2, S3, S4 respectively; Lead-out terminal links to each other with the lead terminal BAR-of capacitance group, and the signal terminal of current sampler CS2, CS3, CS4 links to each other with corresponding controling end of controller U1 respectively.U1 is the capacitance group master controller of being made up of control chips such as DSP, MCU, CPU.
Controller outside U1 comes to control respectively the voltage at each monomer two ends through the driving pulse of control PWM output channel, thereby reaches the conforming purpose of accurate control capacitance group voltage.Simultaneously; Controller outside U1 comes monitoring flow to cross the electric current of each electric capacity through the current signal of sample rate current sampler; In case it is too high to flow through the electric current of each electric capacity; Controller U1 will recently reach the purpose of regulating each condenser current through the driving duty of adjustment PWM, thereby realize the charging of each electric capacity and the control of discharging current.
With reference to Fig. 4; Be the fourth embodiment of the present invention, it is the structure chart with a plurality of battery cells formation battery pack parallel with one another, and wherein E2, E3, E4 are battery; The positive pole of battery E2, E3, E4 links to each other with the lead terminal BAR+ of battery pack respectively; Negative pole links to each other with the drain electrode of MOSFET S2, S3, S4 respectively, and the grid of MOSFETS2, S3, S4 links to each other with PWM2, PWM3, PWM4 respectively, and then is connected with the control terminal of controller; The input of current sampler CS2, CS3, CS4 links to each other with the source electrode of MOSFET S2, S3, S4 respectively; Lead-out terminal then links to each other with the lead terminal BAR-of battery pack, and the signal terminal of current sampler CS2, CS3, CS4 links to each other with corresponding controling end of controller U1 respectively.U1 is the battery pack master controller of being made up of control chips such as DSP, MCU, CPU.
Need to prove, a kind of battery of the present invention/capacitance group equalizing control circuit, switch wherein both can be operated in direct conducting state, also can be operated in the closed loop adjustment duty ratio state of being controlled by controller; Controller can be according to the feedback signal of current sampler, through carrying out the adjusting of duty ratio with monomer series-connected switch, thereby realizes specific output voltage or equivalent internal resistance; Controller can be optimized processing according to the difference of monomer and the analysis of sampled signal, and different monomer is adopted different driving and control strategy, reaching best charging and discharging state, thereby prolongs battery or electric capacity life-span; In addition, based on technological thought of the present invention, by the battery pack after a plurality of battery cell parallel connections, can be through carrying out more massive parallel connection and series connection behind the tandem tap, thus constitute bigger power brick.
Above embodiment is merely explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of on the technical scheme basis, being done all falls within the protection range of the present invention.
Claims (10)
1. battery/capacitance group equalizing control circuit, said battery/capacitance group forms by at least one monomer is parallel with one another; It is characterized in that: also comprise controller, switch and current sampler; Wherein, the quantity of switch is no less than the quantity of monomer, the power terminal of said switch and monomer series-connected; And the control utmost point of switch connects controller, through controlling the control that the utmost point carries out switch and opens duty ratio; The quantity of current sampler is identical with the quantity of monomer, and connects with monomer is corresponding one by one, and the signal terminal of current sampler is connected with controller, according to the action of current-controlled switch.
2. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: said monomer is that battery cell, electric capacity monomer or battery cell mix the mixing module that is connected with the electric capacity monomer.
3. battery as claimed in claim 2/capacitance group equalizing control circuit is characterized in that: said battery cell is single battery, at least two batteries in series or in parallel with each other or the power brick of mixing connection.
4. battery as claimed in claim 2/capacitance group equalizing control circuit is characterized in that: said electric capacity monomer is single electric capacity, at least two electric capacity in series or in parallel with each other or mixes the electric capacity bag that connects.
5. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: said switch is mechanical switch or electronic switch.
6. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: suppress the impulse current excessive problem of battery/electric capacity in charging and discharge process through the control to tandem tap.
7. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: said switch can be operated in direct conducting state, also can be operated in the closed loop adjustment duty ratio state of being controlled by the control system of power brick or battery cell.
8. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: can be packaged through parallel connection and the series connection of carrying out more massive power brick behind the series connection power switch by the power brick after a plurality of battery cell parallel connections.
9. battery as claimed in claim 1/capacitance group equalizing control circuit; It is characterized in that: external control system can be optimized processing according to the difference of battery cell and the analysis of sampled signal, adopts different driving and control strategy to prolong battery or electric capacity life-span to reach best charging and discharging state to different monomers.
10. battery as claimed in claim 1/capacitance group equalizing control circuit is characterized in that: the switch that is connected in the monomer can be operated in following three kinds of operating states: on off state, closed-loop adjustment particular duty cycle state and linear regulation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100047403A CN102447292A (en) | 2012-01-09 | 2012-01-09 | Battery/capacitor bank current sharing control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100047403A CN102447292A (en) | 2012-01-09 | 2012-01-09 | Battery/capacitor bank current sharing control circuit |
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| CN2012100047403A Pending CN102447292A (en) | 2012-01-09 | 2012-01-09 | Battery/capacitor bank current sharing control circuit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009515A (en) * | 2013-02-27 | 2014-08-27 | 蔡富生 | Current steering circuit and current steering method for controlling branch current flowing through branch |
| CN104734263A (en) * | 2013-12-20 | 2015-06-24 | 广西电网公司 | Current sharing control system and method |
| CN104993538A (en) * | 2015-07-06 | 2015-10-21 | 苏州海格新能源汽车电控系统科技有限公司 | Balancing application device and method for chargeable battery pack |
| CN106207286A (en) * | 2016-08-02 | 2016-12-07 | 上海电机学院 | The compensation method of branch current change during a kind of lithium battery group parallel operation |
| CN106253374A (en) * | 2016-08-02 | 2016-12-21 | 上海电机学院 | The compensation method of each branch current during a kind of lithium battery group parallel operation |
| CN106786953A (en) * | 2017-01-06 | 2017-05-31 | 李锐 | Batteries in parallel connection group equalizing system and its method |
| CN107370202A (en) * | 2017-07-05 | 2017-11-21 | 深圳市正浩创新科技有限公司 | Cell parallel balancer and cell parallel equalization methods |
| CN110601319A (en) * | 2019-10-23 | 2019-12-20 | 西安电子科技大学芜湖研究院 | Series-parallel battery conversion module |
| CN110994960A (en) * | 2019-12-06 | 2020-04-10 | 苏州浪潮智能科技有限公司 | Power supply circuit and current sharing method |
| CN111033938A (en) * | 2018-01-30 | 2020-04-17 | 松下知识产权经营株式会社 | Power supply system for vehicle and management device |
| EP3823122A1 (en) * | 2019-11-13 | 2021-05-19 | ABB Schweiz AG | Current control and circuit protection for distributed energy resources |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009515A (en) * | 2013-02-27 | 2014-08-27 | 蔡富生 | Current steering circuit and current steering method for controlling branch current flowing through branch |
| CN104734263A (en) * | 2013-12-20 | 2015-06-24 | 广西电网公司 | Current sharing control system and method |
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| CN104993538B (en) * | 2015-07-06 | 2017-09-22 | 苏州海格新能源汽车电控系统科技有限公司 | A kind of devices and methods therefor of balanced application for rechargeable battery pack |
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| CN106253374A (en) * | 2016-08-02 | 2016-12-21 | 上海电机学院 | The compensation method of each branch current during a kind of lithium battery group parallel operation |
| CN106786953B (en) * | 2017-01-06 | 2019-03-26 | 重庆雅讯电源技术有限公司 | Batteries in parallel connection group equilibrium system and method |
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| CN107370202A (en) * | 2017-07-05 | 2017-11-21 | 深圳市正浩创新科技有限公司 | Cell parallel balancer and cell parallel equalization methods |
| CN107370202B (en) * | 2017-07-05 | 2020-12-08 | 深圳市正浩创新科技有限公司 | Battery parallel balancing device and battery parallel balancing method |
| CN111033938A (en) * | 2018-01-30 | 2020-04-17 | 松下知识产权经营株式会社 | Power supply system for vehicle and management device |
| CN110601319A (en) * | 2019-10-23 | 2019-12-20 | 西安电子科技大学芜湖研究院 | Series-parallel battery conversion module |
| EP3823122A1 (en) * | 2019-11-13 | 2021-05-19 | ABB Schweiz AG | Current control and circuit protection for distributed energy resources |
| US11532933B2 (en) | 2019-11-13 | 2022-12-20 | Abb Schweiz Ag | Current control and circuit protection for distributed energy resources |
| CN110994960A (en) * | 2019-12-06 | 2020-04-10 | 苏州浪潮智能科技有限公司 | Power supply circuit and current sharing method |
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Owner name: INNOEV NEW ENERGY TECHNOLOGY NANJING CO., LTD. Free format text: FORMER OWNER: ZHANG CONGFENG Effective date: 20130628 |
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Effective date of registration: 20130628 Address after: Dong Qi Road Nanjing City, Jiangsu province 210000 kylin Technology Park No. 666 Applicant after: Innoev New Energy Technology Nanjing Co., Ltd. Address before: Dong Qi Road Nanjing City, Jiangsu province 210000 kylin Technology Park No. 666 Applicant before: Zhang Congfeng |
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Application publication date: 20120509 |