CN207225116U - Equalizing circuit - Google Patents
Equalizing circuit Download PDFInfo
- Publication number
- CN207225116U CN207225116U CN201721063179.0U CN201721063179U CN207225116U CN 207225116 U CN207225116 U CN 207225116U CN 201721063179 U CN201721063179 U CN 201721063179U CN 207225116 U CN207225116 U CN 207225116U
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- CN
- China
- Prior art keywords
- switch
- single battery
- micro
- control unit
- battery
- 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.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
A kind of equalizing circuit, including battery pack, micro-control unit, multiple first switches, multiple second switches, the 3rd switch, transformer and collecting unit；The battery pack includes N number of in parallel and series connection single battery, and the transformer includes a primary side winding and multiple vice-side windings being correspondingly arranged with the single battery；The first switch is corresponded with the second switch, and the first switch is corresponded with the single battery；The micro-control unit is used to judge that the working condition of single battery, selection need balanced battery cell by received information, and send corresponding control signal to the described 3rd switch, corresponding first switch and corresponding second switch, with control the 3rd switch, corresponding first switch and corresponding second switch conducting and cutoff frequency and it is balanced when electric current size, into realize the bidirectional equalization between the energy input output port and one or more single battery by the transformer.
Description
【Technical field】
It the utility model is related to electric vehicle engineering field, more particularly to a kind of equalizing circuit.
【Background technology】
At present, electric automobile is gradually promoted and will had broad prospects in future.Electric automobile generally use is moved
Power battery powered.Although the power battery of electric automobile has preferable uniformity when dispatching from the factory, due to the change of environment
With the aging of battery, the capacity of different batteries may produce very big difference.In order to extend the usage time of battery, increase electricity
The service life in pond, it would be desirable to which equalizing circuit carrys out equilibrium monomer battery with two side terminals.But current balancing technique can only be directed to respectively
A single battery carries out balanced, it is impossible to which multiple single batteries or whole battery pack are carried out together for realization while equilibrium, unfavorable
In keeping battery with two side terminals, balanced time-consuming and efficiency is low.
In view of the foregoing, it is really necessary to provide a kind of new equalizing circuit to overcome disadvantages described above.
【The content of the invention】
The purpose of this utility model is to provide a kind of low equalizing circuit of efficient and cost.
To achieve these goals, the utility model provides a kind of equalizing circuit, and the equalizing circuit includes battery pack, micro-
Control unit, N number of first switch, N number of second switch, the 3rd switch, transformer and collecting unit；The battery pack includes N number of
The single battery of series connection, the transformer include a primary side winding and multiple secondary being correspondingly arranged with the single battery around
Group；The first switch is corresponded with the second switch, and the first switch is corresponded with the single battery；It is described
The first end of second switch is connected with the Same Name of Ends of corresponding vice-side winding, and the second end of the second switch passes sequentially through described
The first end and second end of first switch is connected with the cathode of corresponding single battery, wherein the different name end of the 1st vice-side winding
It is connected with the anode of the 1st single battery, the different name end of m-th vice-side winding passes through the M-1 first switch and m-th monomer
The anode of battery is connected, the different name end of the m-th vice-side winding also by M-1 second switch and the M-1 secondary around
The Same Name of Ends of group is connected, and the inductance value of multiple vice-side windings is connected with realizing；The Same Name of Ends of the primary side winding and energy are defeated
Enter output port to be connected, the primary side winding different name end is grounded by the described 3rd switch；The collecting unit and each monomer
The cathode of battery is connected with anode and the micro-control unit, and the collecting unit is used for the voltage for gathering each single battery
And current information, and the information collected is sent to the micro-control unit；The micro-control unit and the first switch
The 3rd end, second switch the 3rd end and it is described 3rd switch the 3rd end be connected, the micro-control unit be used for pass through receipts
The information arrived judges that the working condition of single battery, selection need balanced battery cell, and is switched, accordingly to the described 3rd
First switch and corresponding second switch send corresponding control signal, to control the 3rd switch, corresponding first switch
And the conducting of corresponding second switch and cutoff frequency and it is balanced when electric current size, and then institute is realized by the transformer
State the bidirectional equalization between energy input output port and one or more single battery, M >=2 and M≤N, M are natural number, N is
Natural number.
Further, when the micro-control unit judges that l-th single battery needs balanced, the micro-control unit is defeated
Go out high level to the 3rd end of l-th first switch and the 3rd end of the L-1 first switch, the l-th first switch and
The L-1 first switch conducting, the micro-control unit are opened to the 3rd end of the described 3rd switch and l-th second respectively
Close the 3rd end send state complementation pulse width modulating signal with control it is described 3rd switch and the l-th second switch
Alternate conduction, and then realize the transfer of energy between the energy input output port and the l-th single battery, L >=2 and
L≤N, L are natural number.
Further, when the micro-control unit judges that the 1st single battery needs balanced, the micro-control unit is defeated
Go out high level to the 3rd end of the 1st first switch, the 1st first switch conducting, the micro-control unit is respectively to institute
State the 3rd end of the 3rd switch and the 3rd end of the 1st second switch send the pulse width modulating signals of two state complementations with
The 3rd switch and the 1st second switch alternate conduction are controlled, and then realizes the energy input output port and institute
State the transfer of energy between first single battery.
Further, when the micro-control unit judges that i-th of single battery to j-th of single battery is required for equilibrium
When, the micro-control unit exports high level to the 3rd end of i-th of first switch, the 3rd end and i-th of j-th first switch
+ 1 second switch is to the 3rd end of -1 second switch of jth, i-th of first switch, j-th of first switch and institute
I+1 second switch is stated to described -1 second switch conducting of jth；The micro-control unit is respectively to the described 3rd switch
3rd end and the 3rd end of j-th second switch send the pulse width modulating signals of two state complementations to control the described 3rd
Switch and j-th of second switch alternate conduction, and then realize the energy input output port and i-th to j-th institute
The transfer of energy between single battery is stated, 0 ＜ i ＜ j≤N, i is natural number, and j is natural number.
Further, each first switch is contactor or relay or triode or metal oxide semiconductor field-effect
Transistor or insulated gate bipolar transistor.
Further, each second switch is mos field effect transistor or insulated gate bipolar crystal
Pipe.
Further, the 3rd switch is mos field effect transistor or insulated gate bipolar crystal
Pipe.
Further, the number of turn of multiple vice-side windings is identical.
Compared with the prior art, the utility model by multiple first switches, multiple second switches and the 3rd switch it
Between mutual cooperation realize the even whole battery pack of multiple single batteries carried out at the same time and sync equalizing, to realize equilibrium
High efficiency, in the case that especially whole battery pack is all in low pressure；The utility model is also carried out to more by micro-control unit
A first switch, multiple second switches and the 3rd switch realize overall control to whole circuit and realize energy by transformer
The two-way transfer of amount；In conclusion the utility model can more effectively maintain battery with two side terminals, reach preferably protection battery
Purpose, it is securely and reliably, highly practical.
【Brief description of the drawings】
Fig. 1 is the circuit diagram for the equalizing circuit that the embodiment of the utility model provides.
Fig. 2 is the control principle drawing for the equalizing circuit that the embodiment of the utility model provides.
【Embodiment】
In order to make the purpose of this utility model, technical solution and advantageous effects become apparent from understanding, below in conjunction with
Attached drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shows
So, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
When an element was considered with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to this reality
It is identical with the new normally understood implication of those skilled in the art.Made herein in the specification of the utility model
Term is intended merely to the purpose of description specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, the circuit diagram for the equalizing circuit 100 that the embodiment that Fig. 1 is the utility model provides.The balanced electricity
Road 100 includes battery pack 1, micro-control unit 2, N number of first switch K1, N number of second switch K2, the 3rd switch K3 and transformer T.
The battery pack 1 includes the single battery C of N number of series connection.The transformer T includes a primary side winding Ta and the N number of and list
The vice-side winding Tn that body battery C is correspondingly arranged and the number of turn is identical.The first switch K1 and second switch K2 is corresponded,
The first switch K1 and the single battery C are corresponded, N ＞ 0 and N is natural number.
Please refer to Fig. 1 and Fig. 2, the Same Name of Ends phase of the first end of the second switch K2 and corresponding vice-side winding Tn
Even, the second end of the second switch K2 passes sequentially through the first end and second end and corresponding monomer electricity of the first switch K1
The cathode of pond C is connected.The different name end of wherein the 1st vice-side winding Tn is connected with the anode of the 1st single battery, m-th secondary
Winding Tn different names end is connected by the M-1 first switch K1 with the anode of m-th single battery C, the m-th vice-side winding
The different name end of Tn is also connected by the M-1 second switch K2 with the Same Name of Ends of the M-1 vice-side winding Tn, it should be noted that
M >=2 and M≤N and M are natural number.The Same Name of Ends of the primary side winding Ta is connected with energy input output port V, the primary side
The primary side different name end of winding Ta passes through the described 3rd switch K3 ground connection.The 3rd end of the first switch K1, the second switch
The 3rd end of K2 and the 3rd end of the 3rd switch K3 are connected with the micro-control unit 2 respectively.The equalizing circuit 100 is also
Including collecting unit 3, the collecting unit 3 is connected with the cathode and anode of each single battery C, the collecting unit 3 also with
The micro-control unit 2 is connected.
The operation principle of the equalizing circuit 100 will be illustrated below.
The collecting unit 3 is used for the voltage for gathering each single battery C and electric current and by the voltage collected and electric current
Information is sent to the micro-control unit 2, and the micro-control unit 2 is the main control part of whole equalizing circuit 100, by receiving
Voltage and current information judge to carry out the working condition of each single battery C, determine Balance route strategy, selection needs balanced
Single battery C, and send corresponding control to the described 3rd switch K3, corresponding first switch K1 and corresponding second switch K2
Signal is to control the 3rd switch, conducting and the cutoff frequency of corresponding first switch and corresponding second switch and balanced
When electric current size, and then by the transformer realize the energy input output port and one or more single batteries it
Between bidirectional equalization.
When the micro-control unit 2 judges that l-th single battery C needs balanced, the micro-control unit 2 exports high electricity
Put down the 3rd end to the 3rd end of l-th first switch K1 and the L-1 first switch K1, the l-th first switch K1 and
The L-1 first switch K1 conducting, the micro-control unit 2 is to the 3rd end of the described 3rd switch K3 and l-th second
The 3rd end for switching K2 sends PWM (Pulse Width Modulation, pulse width modulation) signal of a pair of of state complementation
(PWM+ and PWM-) control the 3rd switch K3 and the l-th second switch K2 alternate conductions, further realize the energy
Measure the energy transfer between the input/output port V and l-th single battery C, L >=2 and L≤N, L are natural number.
When the micro-control unit 2 judges that the 1st single battery C needs balanced, the micro-control unit 2 exports high electricity
Put down to the 3rd end of the 1st first switch K1, the 1st first switch K1 and turn on, respectively to institute on the micro-control unit 2
State the 3rd end of the 3rd switch K3 and the 3rd end of the 1st second switch K2 send the pwm signal of a pair of of state complementation with
The alternate conduction of K3 and the 1st second switch K2 of the 3rd switch is controlled, further realizes the energy input output port V
With the energy transfer between the 1st single battery C.
It is described micro- when the micro-control unit 2 judges that i-th single battery C to j-th single battery C needs balanced
Control unit 2 exports high level to the 3rd end of i-th first switch K1 and the 3rd end of j-th of first switch K1, the control
Unit 2 processed also exports the 3rd end that high level arrives -1 second switch K2 of jth to i+1, i-th of first switch K1,
J-th of first switch K1 and i+1 are electric by i-th to j-th monomer with this to -1 second switch K2 conducting of jth
The inductance value series connection of the corresponding vice-side winding Tn of pond C.The micro-control unit 2 is again respectively to the 3rd end of the described 3rd switch K3
And the 3rd end of j-th second switch K2 sends the pwm signal of a pair of of state complementation to control the described 3rd to switch K3 and j-th
The alternate conduction of the second switch K2, further realizes that the energy input output port V arrives -1 institute of jth with i+1
The bidirectional equalization between single battery C is stated, 0 ＜ i ＜ j≤N, i, j is natural number.
It should be noted that duty cycle of the size of electric current by the micro-control unit 2 by adjusting pwm signal when balanced
To control.The transfer process of energy is illustrated by taking the equilibrium of the 1st single battery C as an example below, when the state
When complementary pwm signal controls the 1st second switch K2 conducting and the 3rd switch K3 closures, energy is from the 1st monomer electricity
Pond C is transmitted to the input/output port V by the transformer T.When the pwm signal of state complementation controls the described 3rd
When switching K3 conductings and the 1st second switch K2 closures, energy passes through the transformer T from the input/output port V
It is transmitted to the 1st single battery C.
It should be noted that each first switch K1 is contactor or relay or triode or metal-oxide semiconductor (MOS)
Field-effect transistor or insulated gate bipolar transistor.Each second switch K2 is mos field effect transistor
Or insulated gate bipolar transistor, the 3rd switch K3 is mos field effect transistor or insulated gate bipolar
Transistor npn npn.
The utility model passes through the phase interworking between multiple first switch K1, multiple second switch K2 and the 3rd switch K3
Conjunction realizes the high efficiency for carrying out at the same time and sync equalizing, realizing equilibrium to the even whole battery packs of multiple single battery C, especially
It is whole battery pack all in low pressure in the case of.The utility model also by micro-control unit 2 open multiple first
Close K1, multiple second switch K2 and the 3rd switch K3 realizes whole circuit overall control and realizes energy by transformer T
The two-way transfer of amount.In conclusion the utility model can more effectively maintain battery with two side terminals, reach preferably protection battery
Purpose, it is securely and reliably, highly practical.
The utility model is not restricted to described in description and embodiments, thus for familiar field personnel and
Additional advantage and modification is easily achieved in speech, therefore in the universal limited without departing substantially from claim and equivalency range
In the case of spirit and scope, the utility model be not limited to specific details, representational equipment and shown here as with description
Examples shown.
Claims (8)
- A kind of 1. equalizing circuit, it is characterised in that：Including battery pack, micro-control unit, N number of first switch, N number of second switch, 3rd switch, transformer and collecting unit；The battery pack includes the single battery of N number of series connection, and the transformer includes one Primary side winding and multiple vice-side windings being correspondingly arranged with the single battery；The first switch and the second switch are one by one Corresponding, the first switch is corresponded with the single battery；The first end of the second switch and corresponding vice-side winding Same Name of Ends be connected, the second end of the second switch pass sequentially through the first end and second end of the first switch with it is corresponding The cathode of single battery is connected, wherein the different name end of the 1st vice-side winding is connected with the anode of the 1st single battery, m-th pair The different name end of side winding is connected by the M-1 first switch with the anode of m-th single battery, the m-th winding it is different Name end is also connected by the M-1 second switch with the Same Name of Ends of the M-1 vice-side winding, to realize multiple vice-side windings Inductance value is connected；The Same Name of Ends of the primary side winding is connected with energy input output port, and the primary side winding different name end passes through The 3rd switch ground connection；Cathode and anode and the micro-control unit phase of the collecting unit with each single battery Even, the collecting unit is used for the voltage and current information for gathering each single battery, and the information collected is sent to institute State micro-control unit；The micro-control unit and the 3rd end, the 3rd end and the described 3rd of second switch of the first switch 3rd end of switch is connected, and the micro-control unit is used for working condition, the selection that single battery is judged by received information The battery cell of equilibrium is needed, and is sent to the described 3rd switch, corresponding first switch and corresponding second switch corresponding Control signal, with control the 3rd switch, the conducting of corresponding first switch and corresponding second switch and cutoff frequency with And when balanced electric current size, into realize the energy input output port and one or more monomers by the transformer Bidirectional equalization between battery, M >=2 and M≤N, M are natural number, and N is natural number.
- 2. equalizing circuit as claimed in claim 1, it is characterised in that：When the micro-control unit judges l-th single battery When needing equilibrium, the micro-control unit exports high level to the 3rd end of l-th first switch and the L-1 first switch 3rd end, the l-th first switch and the L-1 first switch conducting, the micro-control unit is respectively to described the 3rd ends of three switches and the 3rd end of l-th second switch send the pulse width modulating signal of a pair of of state complementation to control 3rd switch and the l-th second switch alternate conduction, and then realize the energy input output port and the L The transfer of energy between a single battery, L >=2 and L≤N, L are natural number.
- 3. equalizing circuit as claimed in claim 2, it is characterised in that：When the micro-control unit judges the 1st single battery When needing equilibrium, the micro-control unit exports high level to the 3rd end of the 1st first switch, the 1st first switch Conducting, the micro-control unit send a pair of to the 3rd end at the 3rd end of the described 3rd switch and the 1st second switch respectively The pulse width modulating signal of state complementation with control it is described 3rd switch with the 1st second switch alternate conduction, and then Realize the transfer of energy between the energy input output port and first single battery.
- 4. equalizing circuit as claimed in claim 3, it is characterised in that：When the micro-control unit judges i-th of single battery When being required for equilibrium to j-th of single battery, the micro-control unit output high level to the 3rd end of i-th of first switch, 3rd end of j-th first switch and i+1 second switch are to the 3rd end of -1 second switch of jth, described i-th first Switch, j-th of first switch and the i+1 second switch are turned on to described -1 second switch of jth；The micro-control Unit processed sends the pulse of a pair of of state complementation to the 3rd end at the 3rd end of the described 3rd switch and j-th of second switch respectively Bandwidth modulation signals realize that the energy is defeated to control the 3rd switch and j-th of second switch alternate conduction Enter the transfer of energy between output port and i-th to j-th single battery, 0 ＜ i ＜ j≤N, i is natural number, and j is certainly So number.
- 5. equalizing circuit as claimed in claim 4, it is characterised in that：Each first switch is contactor or relay or three poles Pipe or mos field effect transistor or insulated gate bipolar transistor.
- 6. equalizing circuit as claimed in claim 5, it is characterised in that：Each second switch is metal oxide semiconductcor field effect Answer transistor or insulated gate bipolar transistor.
- 7. equalizing circuit as claimed in claim 6, it is characterised in that：3rd switch is metal oxide semiconductcor field effect Answer transistor or insulated gate bipolar transistor.
- 8. equalizing circuit as claimed in claim 1, it is characterised in that：The number of turn of multiple vice-side windings is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721063179.0U CN207225116U (en) | 2017-08-23 | 2017-08-23 | Equalizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721063179.0U CN207225116U (en) | 2017-08-23 | 2017-08-23 | Equalizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207225116U true CN207225116U (en) | 2018-04-13 |
Family
ID=61858648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721063179.0U Expired - Fee Related CN207225116U (en) | 2017-08-23 | 2017-08-23 | Equalizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207225116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152686A (en) * | 2019-12-31 | 2020-05-15 | 江西科然科技有限公司 | Battery management system for active equalization of battery pack of electric vehicle |
| CN112688375A (en) * | 2020-12-03 | 2021-04-20 | 华南理工大学 | Balanced output system based on multi-winding transformer |
-
2017
- 2017-08-23 CN CN201721063179.0U patent/CN207225116U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152686A (en) * | 2019-12-31 | 2020-05-15 | 江西科然科技有限公司 | Battery management system for active equalization of battery pack of electric vehicle |
| CN112688375A (en) * | 2020-12-03 | 2021-04-20 | 华南理工大学 | Balanced output system based on multi-winding transformer |
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Granted publication date: 20180413 Termination date: 20180823 |