CN104113110A - Battery equalization circuit - Google Patents
Battery equalization circuit Download PDFInfo
- Publication number
- CN104113110A CN104113110A CN201410293688.7A CN201410293688A CN104113110A CN 104113110 A CN104113110 A CN 104113110A CN 201410293688 A CN201410293688 A CN 201410293688A CN 104113110 A CN104113110 A CN 104113110A
- Authority
- CN
- China
- Prior art keywords
- battery
- inductance
- gate
- controlled switch
- equalization
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000011217 control strategy Methods 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 3
- 239000000178 monomer Substances 0.000 claims description 36
- 238000004146 energy storage Methods 0.000 claims description 22
- 230000001939 inductive effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 description 6
- 239000011449 brick Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a battery equalization circuit and realization method thereof. The battery equalization circuit comprises a battery pack, an inductor, an equalization control switch, and an equalization controller. The battery pack includes N signal batteries in series connection. The inductor is used for storing and releasing energy. The equalization control switch includes N+1 controllable switches. The equalization controller is used for detecting data of real-time voltages, currents, and SOCs and the like of the single batteries and carrying out processing, formulating an equalization control strategy, and controlling turning on and off the equalization control switch. According to the invention, the voltages or SOCs of the single batteries can be monitored in real time and single batteries needing equalization are determined, thereby realizing energy transferring between single batteries or between the single battery and the multi-section battery. Because not only the energy transferring between the high-energy single battery and the low-energy single battery can be realized to realize the effect of peak load shifting and but also energy transferring between the multi-section battery and the single battery is also can be realized, the provided battery equalization circuit has advantages of high equalization efficiency, low simple equalization circuit cost, and flexible and changeable equalization control strategies.
Description
Technical field
The invention belongs to cell balancing field, be specifically related to a kind of battery equalizing circuit.
Background technology
Along with the aggravation of environmental pollution, the new energy technologies such as electric automobile have obtained global concern and development fast, and wherein battery energy storage becomes the bottleneck of Development of Electric Vehicles.Due to the requirement of electric automobile continual mileage and the restriction of the low-voltage low capacity of battery cell own, in power battery pack, need a large amount of battery cells to connect driving voltage and the driveability that provides required.But, due to external environment condition differences such as existing manufacturing technology and inevitable temperature, cause initial capacity between a large amount of monomers, operating voltage, the residual capacity etc. can not be in full accord, cause indivedual monomer super-charge super-discharges in battery use procedure, affect battery and safety.And because the existence of " wooden barrel effect " affects the capacity of whole power brick, positive feedback effect makes the battery cell that capacity is little " loss " serious all the more.A good cell balancing can lower the inconsistency between battery cell to a great extent, thereby effectively avoids overcharging or the generation of overdischarge of some battery cell in power brick, thereby keeps the operating characteristic of power brick.Therefore, cell balancing occupies critical positions in cell management system of electric automobile.
Battery equalizing circuit is divided into dissipation and two kinds of non-dissipation.Dissipative type circuit because loss of energy, research is gradually few.In non-dissipation circuit, large multicircuit complexity, adopts more electronic devices and components, has reduced system reliability and has made battery equalization system with high costs simultaneously.
Chinese invention patent application (application number: 201110042752.0) disclose a kind of battery equalizing circuit and control method thereof and cell stacks equalizing circuit.This scheme has improved energy transfer efficiency, but this circuit is comparatively complicated, has wherein used a lot of original papers such as switch and diode, with high costs.
Chinese invention patent application (application number: 201210179402.3) disclose a kind of battery balanced device and stacking balancer.This scheme is improved upper a kind of balancing technique, and being applied to N+1(N is number of batteries) individual controlled switch and 4 rectifier switchs.Rectifier switch makes battery balanced control system complicated, and reliability is lower.
Summary of the invention
The object of the invention is to realize consistency between cell by the switching circuit of equalizing system control and reach requirement.Therefore energy transfer method between a kind of battery is provided, and by Real-Time Monitoring battery cell voltage or SOC, judgement needs balanced monomer, and the energy of realizing between monomer and monomer or between cell and multiple batteries shifts.Thereby the energy that can realize between high-energy monomer and low-yield monomer due to this scheme shifts realization " peak load shifting ", the energy that can realize again between multiple batteries and cell shifts, so its balanced efficiency is higher.Meanwhile, the equalizing circuit topological structure that the present invention proposes is very effectively simple, and two kinds of methods that the element of using is mentioned all will be lacked, so its cost is lower, reliability is higher.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of battery equalizing circuit, comprising:
Battery pack, comprises N battery cell of connecting, and wherein, battery cell is divided into odd number group and even number set according to numbering, and each battery unit has anode and negative electrode, and N is greater than 1 integer.
Inductance, for storing and releasing energy.
Balanced control switch, comprises N+1 gate-controlled switch, and wherein N is battery cell number.Battery cell anode and negative electrode are connected in described inductance by gate-controlled switch, and wherein, gate-controlled switch is divided into odd number group and even number set according to numbering, and odd number group gate-controlled switch is connected to inductance one utmost point jointly, and even number set gate-controlled switch is connected to another utmost point of inductance jointly.
Balance controller, for detection of the data such as battery cell real-time voltage, electric current, SOC processing, formulates balanced control strategy, controls balanced control switch and opens and closes.
According to a kind of battery equalizing circuit described in right 1, it is characterized in that: between every two batteries, all connect a gate-controlled switch, N batteries has N+1 gate-controlled switch.
Further, described gate-controlled switch connects battery and inductance, by selecting the keying of different switches to select required balancing battery monomer.
Further, each cycle of balancing procedure is divided into two stages:
First stage: select high-energy cell or multiple batteries, corresponding gate-controlled switch closed communicating battery and inductance, battery discharge, inductive energy storage, finishes rear switch and disconnects;
Second stage: inductive energy storage finishes, selects low-yield monomer or multiple batteries, corresponding gate-controlled switch closed communicating battery and inductance, and inductance is emitted storage power previous stage, and battery charging finishes rear switch and disconnects;
Further, balancing procedure can directly carry out carrying out between odd number group battery cell and even number set battery cell balanced, also can be indirectly realizes battery balanced between odd-odd or even-idol by the mode of strange-even-odd or even-odd-idol.
Further, balanced way comprise monomer to monomer, monomer to more piece, more piece to various battery balanced modes such as more pieces.
Further, install as energy storage device with inductance or class inductance etc.
Further, balance controller has the function that detects battery cell real-time condition, can process image data, judge, selects different balanced control strategies, can send control signal, controls equalizer switch and opens and closes.
The beneficial effect that the present invention produces is:
1. this equalizing circuit selects the most direct balance policy of " peak load shifting " formula to realize battery consistency requirement, and this mode is more direct, and therefore balanced efficiency is higher, has shortened time for balance, reduces and consumes.
2. the present invention, ensureing that the due ability of equalization simultaneously, applied few element, has greatly reduced and has produced cost by batch, subsidiary raising the reliability of system.
This equalizing circuit can realize monomer to monomer, monomer to multiple batteries, the various balanced way of multiple batteries to multiple batteries.Control mode is more flexible, can formulate the balanced control strategy of difference or mixing to improve balanced efficiency.
Brief description of the drawings
Fig. 1 is structural representation figure of the present invention;
Fig. 2 is odd number battery C1 electric discharge in the present invention, the process of inductance L energy storage;
Fig. 3 is through odd number battery discharge, the backward even number battery cell of inductive energy storage C2 charging process;
Fig. 4 is through odd number battery discharge, the backward even number battery cell of inductive energy storage C4 charging process;
Fig. 5 is that the present invention discharges at multiple batteries, the process of inductance L energy storage;
Fig. 6 is through multiple batteries electric discharge, the backward battery cell C3 of inductive energy storage charging process.
embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
Operation principle of the present invention is: balanced general principle adopts Buck-Boost circuit theory.First the real-time parameter such as the continuous acquisition testing battery cell of balance controller voltage, electric current, temperature, obtains battery cell SOC, judge higher-energy monomer and more low-yield monomer, formulation control strategy.If monomer shifts the energy of monomer, the relevant gate-controlled switch of first closed high energy battery monomer, it fills to coil can, after certain hour, disconnect and fill energy switch, closure need to be filled energy battery cell respective switch, because inductance has the constant characteristic of original electric current of maintenance, thereby realize the process that energy shifts from coil to battery cell.The decision monomer energy of circuit characteristic shifts from odd number battery cell to even number battery cell, or shifts from even number battery cell to odd number battery cell.So energy transfer process is as follows: according to the highest battery cell C of data selection odd number energy obtaining detecting
2m+1to minimum energy even number battery cell C
2kcarry out energy transfer, vice versa.If need even number monomer C
2kwith even number monomer C
2mbetween carry out energy transfer, only need by an odd number monomer C
2k+1carrying out twice energy as intermediate shifts.Realize all battery consistencies by the balance policy of continuous " peak load shifting " and reach requirement.In addition, according to the difference of balance policy, also can realize multiple batteries and single battery, the energy branch mode that multiple batteries is different from multiple batteries etc.
Fig. 1 is structural representation of the present invention.C1 ~ Cn is series connection cell, and n, for being greater than 1 integer, is divided into odd number group and even number set according to numbering by battery cell.S1 ~ Sn+1 is gate-controlled switch, is divided into odd number group and even number set equally according to numbering.L is public energy storage inductor.Battery cell both positive and negative polarity is connected in public energy storage inductor two ends by corresponding gate-controlled switch, and wherein odd number group gate-controlled switch is connected to inductance L one end jointly, and even number set is connected to the inductance L other end jointly.Balance controller is the main control part of whole equalizing system, the parameters such as its monomer voltage for detection of battery cell C1 ~ Cn, overall equilibrium and discharging current, ambient temperature, calculate each battery cell capacity by detecting data, judge battery cell working condition, determine balanced control strategy, select required balancing battery monomer, send the work such as control signal that controllable switch S 1 ~ Sn+1 is opened and closed.In the time that battery cell Cn needs equilibrium, controllable switch S n and Sn+1 closure.
Just concrete balancing procedure is introduced analysis below:
Referring to Fig. 2, Fig. 2 is odd number battery C1 electric discharge in the present invention, the process of inductance L energy storage.As shown in Figure 2, balance control system detects that C1 battery cell SOC is the highest or when too high, equalizing circuit starts, balanced control switch S1, S2 closure, and C1 is communicated with inductance L, and now C1 discharges, and electric current increases gradually, elapsed time t1, disconnection.
Referring to Fig. 3, Fig. 3 is through odd number battery discharge, the backward even number battery cell of inductance L energy storage C2 charging process.As shown in Figure 3, balance control system detects that C2 battery cell SOC is minimum or when too low, C1(odd number battery cell) electric discharge inductive energy storage after (after being the t1 time), Closing Switch S2, S3, C2 is communicated with inductance L, and due to the characteristic that inductance L electric current can not suddenly change, inductance L starts to charge to C2, elapsed time t2, disconnects.After isolation time t3, repeat above-mentioned balancing procedure, cycle T=t1+t2+t3.
Referring to Fig. 4, Fig. 4 is through odd number battery discharge, the backward even number battery cell of inductance L energy storage C4 charging process.Fig. 4 explanation, C1(high-energy odd number monomer) energy can be transferred to any one low-yield even number monomer, vice versa.The energy that this circuit can be realized between non-conterminous battery cell shifts.Between even number monomer and even number monomer, carry out energy transfer if need, only need carry out twice energy as intermediate by an odd number monomer and shift.
Referring to Fig. 5, Fig. 5 is that the present invention discharges at multiple batteries, the process of inductance L energy storage.S2 and Sn switch closure, C2-Cn-1 battery discharge, inductive energy storage.This figure has illustrated that multiple batteries discharges to inductive energy storage process.
Referring to Fig. 6, Fig. 6 is through multiple batteries electric discharge, the backward battery cell C3 of inductance L energy storage charging process.Illustrate that in conjunction with Fig. 5 the energy that this circuit can carry out between battery cell and multiple batteries shifts to realize balanced.The energy that in like manner, can carry out between multiple batteries and multiple batteries shifts to realize the stacked circuit between balanced or baby battery bag.
Claims (8)
1. a battery equalizing circuit, is characterized in that, comprising:
Battery pack, comprises N battery cell of connecting, and wherein, battery cell is divided into odd number group and even number set according to numbering, and each battery unit has anode and negative electrode, and N is greater than 1 integer;
Inductance, for storing and releasing energy;
Balanced control switch, comprises N+1 gate-controlled switch, and wherein N is battery cell number;
Battery cell anode and negative electrode are connected in described inductance by gate-controlled switch, and wherein, gate-controlled switch is divided into odd number group and even number set according to numbering, and odd number group gate-controlled switch is connected to inductance one utmost point jointly, and even number set gate-controlled switch is connected to another utmost point of inductance jointly;
Balance controller, for detection of the data such as battery cell real-time voltage, electric current, SOC processing, formulates balanced control strategy, controls balanced control switch and opens and closes.
2. according to a kind of battery equalizing circuit described in right 1, it is characterized in that: between every two batteries, all connect a gate-controlled switch, N batteries has N+1 gate-controlled switch.
3. according to a kind of battery equalizing circuit described in right 2, it is characterized in that: described gate-controlled switch connects battery and inductance, by selecting the keying of different switches to select required balancing battery monomer.
4. according to a kind of battery equalizing circuit described in right 3, it is characterized in that: each cycle of balancing procedure is divided into two stages:
First stage: select high-energy cell or multiple batteries, corresponding gate-controlled switch closed communicating battery and inductance, battery discharge, inductive energy storage, finishes rear switch and disconnects;
Second stage: inductive energy storage finishes, selects low-yield monomer or multiple batteries, corresponding gate-controlled switch closed communicating battery and inductance, and inductance is emitted storage power previous stage, and battery charging finishes rear switch and disconnects.
5. according to a kind of battery equalizing circuit described in right 4, it is characterized in that: balancing procedure can directly carry out carrying out between odd number group battery cell and even number set battery cell balanced, also can be indirectly realize battery balanced between odd-odd or even-idol by the mode of strange-even-odd or even-odd-idol.
6. according to a kind of battery equalizing circuit described in right 4, it is characterized in that: balanced way comprise monomer to monomer, monomer to more piece, more piece to various battery balanced modes such as more pieces.
7. according to a kind of battery equalizing circuit described in right 1, it is characterized in that: install as energy storage device with inductance or class inductance etc.
8. according to a kind of battery equalizing circuit described in right 1, it is characterized in that: balance controller has the function that detects battery cell real-time condition, can process image data, judge, select different balanced control strategies, can send control signal, control equalizer switch and open and close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293688.7A CN104113110A (en) | 2014-06-27 | 2014-06-27 | Battery equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293688.7A CN104113110A (en) | 2014-06-27 | 2014-06-27 | Battery equalization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104113110A true CN104113110A (en) | 2014-10-22 |
Family
ID=51709790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410293688.7A Pending CN104113110A (en) | 2014-06-27 | 2014-06-27 | Battery equalization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104113110A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921198A (en) * | 2017-04-20 | 2017-07-04 | 西安交通大学 | Equalizing circuit structure and equalization methods between a kind of battery cell |
| CN107046305A (en) * | 2017-01-22 | 2017-08-15 | 常州机电职业技术学院 | Battery equalization method and structure |
| CN107742910A (en) * | 2017-11-02 | 2018-02-27 | 杰华特微电子（杭州）有限公司 | Battery charger and method |
| CN108232344A (en) * | 2018-01-22 | 2018-06-29 | 山东大学 | A kind of battery low-temperature heating system and method for coupling the non-equal balance system of dissipation type |
| CN108321871A (en) * | 2018-01-31 | 2018-07-24 | 山东科技大学 | A kind of active equalization circuit and its equalization methods of series battery |
| WO2021044410A1 (en) * | 2019-09-04 | 2021-03-11 | Irp Nexus Group Ltd | Power distribution unit with regeneration capabilities |
| CN112737056A (en) * | 2021-01-14 | 2021-04-30 | 上海智光电力技术有限公司 | Method and device for balancing electric quantity of battery module |
| CN112910042A (en) * | 2021-02-03 | 2021-06-04 | 国网浙江省电力有限公司杭州供电公司 | Active equalization system for series battery pack |
| EP3920364A4 (en) * | 2019-07-23 | 2023-01-18 | Huawei Digital Power Technologies Co., Ltd. | Battery equalization circuit and control method therefor, and uninterrupted power supply system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427255A (en) * | 2011-10-28 | 2012-04-25 | 东风汽车公司 | Automatic voltage balancing method and device for power battery pack |
| US20130093248A1 (en) * | 2011-10-12 | 2013-04-18 | Texas Instruments Incorporated | Inductor-based active balancing for batteries and other power supplies |
| CN204030652U (en) * | 2014-06-27 | 2014-12-17 | 三门峡速达交通节能科技股份有限公司 | A kind of battery equalizing circuit |
-
2014
- 2014-06-27 CN CN201410293688.7A patent/CN104113110A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130093248A1 (en) * | 2011-10-12 | 2013-04-18 | Texas Instruments Incorporated | Inductor-based active balancing for batteries and other power supplies |
| CN102427255A (en) * | 2011-10-28 | 2012-04-25 | 东风汽车公司 | Automatic voltage balancing method and device for power battery pack |
| CN204030652U (en) * | 2014-06-27 | 2014-12-17 | 三门峡速达交通节能科技股份有限公司 | A kind of battery equalizing circuit |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046305A (en) * | 2017-01-22 | 2017-08-15 | 常州机电职业技术学院 | Battery equalization method and structure |
| CN106921198A (en) * | 2017-04-20 | 2017-07-04 | 西安交通大学 | Equalizing circuit structure and equalization methods between a kind of battery cell |
| CN107742910A (en) * | 2017-11-02 | 2018-02-27 | 杰华特微电子（杭州）有限公司 | Battery charger and method |
| CN107742910B (en) * | 2017-11-02 | 2024-02-20 | 杰华特微电子股份有限公司 | Battery charging circuit and method |
| CN108232344A (en) * | 2018-01-22 | 2018-06-29 | 山东大学 | A kind of battery low-temperature heating system and method for coupling the non-equal balance system of dissipation type |
| CN108232344B (en) * | 2018-01-22 | 2020-08-14 | 山东大学 | A battery low temperature heating system and method coupled with a non-dissipative equalization system |
| CN108321871A (en) * | 2018-01-31 | 2018-07-24 | 山东科技大学 | A kind of active equalization circuit and its equalization methods of series battery |
| EP3920364A4 (en) * | 2019-07-23 | 2023-01-18 | Huawei Digital Power Technologies Co., Ltd. | Battery equalization circuit and control method therefor, and uninterrupted power supply system |
| WO2021044410A1 (en) * | 2019-09-04 | 2021-03-11 | Irp Nexus Group Ltd | Power distribution unit with regeneration capabilities |
| CN112737056A (en) * | 2021-01-14 | 2021-04-30 | 上海智光电力技术有限公司 | Method and device for balancing electric quantity of battery module |
| CN112737056B (en) * | 2021-01-14 | 2025-03-18 | 上海智光电力技术有限公司 | Battery module power balancing method and device |
| CN112910042A (en) * | 2021-02-03 | 2021-06-04 | 国网浙江省电力有限公司杭州供电公司 | Active equalization system for series battery pack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104113110A (en) | Battery equalization circuit | |
| CN102222957B (en) | Automatic battery capacity equalization circuit and implementing method thereof | |
| CN101740827B (en) | Active equalization system of lithium-ion power battery and equalization method thereof | |
| CN102035010B (en) | Battery unit equalizing circuit and method | |
| CN103236732B (en) | Active equalizing system and equalizing method for power lithium ion battery pack | |
| CN108134414B (en) | Modular equalization circuit and equalization mode thereof | |
| CN107134599B (en) | A voltage equalization circuit of a series battery pack and its working method | |
| CN106712211A (en) | Multi-input transformation-based dual-layer active balance circuit and implementation method | |
| CN202231461U (en) | Charge-discharge balance control system for power battery pack | |
| CN103023107A (en) | Novel lithium battery pack lossless equalization circuit | |
| CN105391130B (en) | Battery equalizing circuit and its control method based on multiphase interleaved converter | |
| CN207852851U (en) | Battery management system with sync equalizing function | |
| CN103560561B (en) | A kind of balanced charge-discharge device of lithium battery management system | |
| CN107342442A (en) | A non-destructive equalization circuit for battery pack based on flyback circuit | |
| CN103227486B (en) | Battery testing energy recovery device and control method | |
| CN103607002A (en) | Cell equalization charging method | |
| CN203135473U (en) | Non-energy consumption battery charge equalizing apparatus | |
| CN202206153U (en) | Battery module balance circuit | |
| CN103036256A (en) | Transformer scan chain type storage battery equalizing circuit and method | |
| Marcin et al. | Overview of active balancing methods and simulation of capacitor based active cell balancing for battery pack in EV | |
| CN103036277B (en) | Equalizer circuit of dynamic and energy storage battery pack | |
| CN203607881U (en) | A shunt equalizing charging device | |
| CN103036257A (en) | Equalizing circuit and method for single inductance type storage battery group | |
| CN102856936A (en) | Device for balancing power batteries | |
| CN108551180A (en) | Battery equalization method and balanced device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141022 |