CN108063473A - Battery equalizing circuit and control method - Google Patents
Battery equalizing circuit and control method Download PDFInfo
- Publication number
- CN108063473A CN108063473A CN201711360761.8A CN201711360761A CN108063473A CN 108063473 A CN108063473 A CN 108063473A CN 201711360761 A CN201711360761 A CN 201711360761A CN 108063473 A CN108063473 A CN 108063473A
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- battery
- discharge
- circuit
- switch
- control circuit
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000012512 characterization method Methods 0.000 claims abstract description 5
- 230000001939 inductive effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H02J7/0077—
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- H02J2007/0067—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of battery equalizing circuit and control methods, the battery equalizing circuit includes ON-OFF control circuit and battery discharging circuit, the ON-OFF control circuit receives battery voltage signal of the characterization per batteries both end voltage difference, when certain economize on electricity cell voltage reaches threshold voltage, respective switch in ON-OFF control circuit is then controlled to turn on, two adjacent switches do not simultaneously turn in ON-OFF control circuit：When some switch conduction in ON-OFF control circuit, corresponding discharge tube conducting in the battery discharging circuit discharges to respective battery with realizing, when two adjacent sections battery difference discharges.When heretofore described ON-OFF control circuit is integrated in piece, it is possible to reduce chip pin simplifies battery equalizing circuit designing scheme.
Description
Technical field
The present invention relates to field of power electronics, more particularly to a kind of battery equalizing circuit and control method.
Background technology
One battery pack includes multiple batteries, the problem of due to actual production technique, has difference between each single battery
Different, battery set charge/discharge process will also result in the difference of voltage and capacity in every batteries.Such as Fig. 1, prior art electricity is illustrated
Pond equalizing circuit, by taking cell voltage is economized on electricity in equilibrium three as an example, including：Battery V1, battery V2, (V1, V2, V3 are characterized battery V3 simultaneously
Each batteries voltage swing), battery discharging circuit U01, ON-OFF control circuit U02 and comparison circuit U03.The battery discharge electricity
Road U01 includes three battery discharge modules, and each battery corresponds to a battery discharge module.The corresponding battery discharges of battery V1
Module includes：Resistance R1, R4, R5, discharge tube M1 and capacitance C1, resistance R1 first ends connection battery V1 anodes and resistance R4 first
End, the connection discharge tube M1 drain electrodes of resistance R1 second ends, discharge tube M1 source electrodes connection battery V1 cathodes and resistance R5 first ends, capacitance
C1 both ends connect resistance R4 second ends and resistance R5 second ends respectively；The corresponding battery discharge modules of battery V2 include：Resistance R2,
R5, R6, discharge tube M2 and capacitance C2, resistance R2 first ends connection battery V2 anodes and resistance R5 first ends, resistance R2 second ends
Discharge tube M2 drain electrodes are connected, discharge tube M2 source electrodes connection battery V2 cathodes and resistance R6 first ends, capacitance C2 both ends connect respectively
Resistance R5 second ends and resistance R6 second ends；The corresponding battery discharge modules of battery V3 include：Resistance R3, R6, R7, discharge tube M3
With capacitance C3, resistance R3 first ends connection battery V3 anodes and resistance R6 first ends, the connection discharge tube M3 leakages of resistance R3 second ends
Pole, discharge tube M3 source electrodes connection battery V3 cathodes and resistance R7 first ends, capacitance C3 both ends connect respectively resistance R6 second ends and
Resistance R7 second ends.The ON-OFF control circuit U02 include six switch k1, k2 ..., k6 and comparison circuit U03, battery
V1 is to inductive switch k1, k2, and battery V2 is to inductive switch k3, k4, and battery V3 is to inductive switch k5, k6.Switch k1 first ends connection capacitance
C1 first ends and comparison circuit U03, switch k2 first ends connection capacitance C1 second ends and comparison circuit U03, switch k1 second ends
It is connected with switch k2 second ends, connecting pin connection discharge tube M1 grids；Switch k3 first ends connection capacitance C2 first ends and ratio
Compared with circuit U 03, switch k4 first ends connection capacitance C2 second ends and comparison circuit U03 switch k3 second ends and switch k4 second
End is connected, connecting pin connection discharge tube M2 grids；K5 first ends connection capacitance C3 first ends and comparison circuit U03 are switched, is opened
K6 first ends connection capacitance C3 second ends and comparison circuit U03 are closed, switch k5 second ends are connected with switch k6 second ends, connect
End connection discharge tube M3 grids.More than resistance R1 and discharge tube M1, R2 and discharge tube M2, R3 and discharge tube M3 can also use electric current
Source substitutes.
Comparison circuit U03 is received per voltage in batteries, will per voltage in batteries respectively compared with reference voltage V ref,
When certain economize on electricity cell voltage, for example, during V1 ＞ Vref, comparison circuit output comparison signal Q1, Q1 ' switch k1 is controlled to be closed respectively,
K2 is disconnected, and the grid voltage of discharge tube M1 is driven high, and discharge tube M1 conductings, battery is discharged by resistance R1.When battery V1 discharges
After a period of time, switch k1 is disconnected, and k2 is closed, and resistance R5 both end voltages are insufficient to allow discharge tube M1 to turn on, and battery V1 stoppings are put
Electricity.Capacitance C1 is used for filtering out the peak voltage generated in battery V1 charge and discharge or hot plug process.Battery V1, V2, V3 can be simultaneously
Electric discharge.
Application for N batteries is, it is necessary to 2N switch k1、k2、......、k2N, when ON-OFF control circuit i.e. switch and
, it is necessary to which the cost of 2N+1 chip pin, chip design and encapsulation is larger when comparison circuit is integrated in piece.
The content of the invention
The object of the present invention is to provide a kind of battery equalizing circuit and control method, for solving core existing in the prior art
The problem of piece designs and packaging cost is larger.
To achieve the above object, the present invention provides a kind of battery equalizing circuit, including：
ON-OFF control circuit, the ON-OFF control circuit receive cell voltage letter of the characterization per batteries both end voltage difference
Number, when certain economize on electricity cell voltage reaches threshold voltage, then respective switch in ON-OFF control circuit is controlled to turn on, ON-OFF control circuit
In adjacent two switches do not simultaneously turn on；
Battery discharging circuit, when some switch conduction in ON-OFF control circuit, corresponding discharge tube in battery discharging circuit
Conducting discharges to respective battery with realizing, when two adjacent sections battery difference discharges.
Optionally, odd number batteries can discharge simultaneously；Even number batteries can discharge simultaneously.
Optionally, the ON-OFF control circuit include comparison circuit and with the one-to-one multiple switch of battery, the ratio
Cell voltage will be often economized on electricity respectively compared with threshold voltage compared with circuit, obtains corresponding comparison signal, and the comparison signal is made
For the control signal of respective switch.
Optionally, the ON-OFF control circuit is integrated in piece, the both ends each switched in the ON-OFF control circuit
It draws as chip pin.
Optionally, the battery discharging circuit includes multiple battery discharge modules, and a battery is corresponded to per batteries and is put
Electric module, each battery discharge module connect one to one with the multiple switch.
Optionally, the battery discharge module includes discharge tube and first resistor, the discharge tube and first resistor composition
Series circuit, the series circuit are connected in parallel on respective battery both ends, and the first resistor is used for battery discharge；Certain batteries electricity
When pressure reaches threshold voltage, the discharge tube in respective battery discharge module is closed, corresponding battery discharge.
Optionally, the battery discharge module includes the first current source, and first current source is connected in parallel on respective battery two
End, first current source are used for battery discharge；When certain economize on electricity cell voltage reaches threshold voltage, in respective battery discharge module
Current source be closed, corresponding battery discharge.
Optionally, the battery discharge module further includes second resistance and 3rd resistor, and the second resistance first end connects
The anode of battery and the series circuit first end are connect, the second resistance second end connects corresponding in the ON-OFF control circuit
The first end of switch；The cathode of 3rd resistor first end connection respective battery and the series circuit second end, described the
Where the connection of three resistance second ends in battery module in the control terminal of discharge tube and the ON-OFF control circuit respective switch the
Two ends；One of battery discharge mould 3rd resistor in the block is as the second resistance in adjacent cell discharge module.
Optionally, pressure drop is generated during one of switch conduction, in corresponding 3rd resistor respective switch pipe to be driven to lead
It is logical.
Optionally, the battery discharge module further includes capacitance, and the capacitance both ends connect the second resistance respectively
Two ends and the 3rd resistor second end, and switch in parallel corresponding with the ON-OFF control circuit；The second resistance and
The capacitance forms filter circuit.
Present invention additionally comprises a kind of battery balanced control methods：
Cell voltage of the characterization per batteries both end voltage difference is received, when certain economize on electricity cell voltage reaches threshold voltage, then
Respective switch conducting is controlled, two adjacent switches do not simultaneously turn on；During some switch conduction, corresponding discharge tube break-make, with
It realizes and discharges respective battery, when two adjacent sections battery difference discharges.
Compared with prior art, the technical solution of the present invention has the following advantages：Certain economize on electricity cell voltage reaches threshold voltage
When, then respective switch is controlled to turn on, two adjacent switches do not simultaneously turn on；During some switch conduction, corresponding discharge tube leads to
It is disconnected, it is discharged with realizing respective battery, when two adjacent sections battery difference discharges, and ON-OFF control circuit of the present invention is integrated in
When in piece, reduce chip pin, simplify the designing scheme of battery equalizing circuit.
Description of the drawings
Fig. 1 is prior art battery equalizing circuit schematic diagram；
Fig. 2 is battery equalizing circuit schematic diagram of the present invention；
Fig. 3 is comparison circuit schematic diagram in Fig. 2；
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to which the public is made to have thorough understanding to the present invention, it is described in detail in present invention below preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
More specifically description is of the invention by way of example referring to the drawings in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to convenience, the embodiment of the present invention is lucidly aided in illustrating
Purpose.
As shown in Fig. 2, battery equalizing circuit of the present invention is illustrated, by taking cell voltage is economized on electricity in equilibrium three as an example, including：Battery
V1, battery V2, battery V3 (V1, V2, V3 characterize each batteries voltage swing simultaneously), battery discharging circuit U1, switch control electricity
Road U2.The battery discharging circuit U1 includes three battery discharge modules, and each battery corresponds to a discharge module.Battery V1
Corresponding battery discharge module includes：Resistance R1, R4, R5, discharge tube M1 and capacitance C1, the discharge tube can be transistor,
Thyristor, metal-oxide-semiconductor etc., here by taking metal-oxide-semiconductor as an example, resistance R1 first ends connection battery V1 anodes and resistance R4 first ends, resistance
The connection discharge tube M1 drain electrodes of R1 second ends, discharge tube M1 source electrodes connection battery V1 cathodes and resistance R5 first ends, discharge tube M1 grid
Pole connects resistance R5 second ends, and capacitance C1 both ends connect resistance R4 second ends and resistance R5 second ends respectively；Battery V2 is corresponding
Battery discharge module includes：Resistance R2, R5, R6, discharge tube M2 and capacitance C2, resistance R2 first ends connection battery V2 anodes and electricity
Hinder R5 first ends, the connection discharge tube M2 drain electrode of resistance R2 second ends, discharge tube M2 source electrodes connection battery V2 cathodes and resistance R6 the
One end, discharge tube M2 grids connection resistance R6 second ends, capacitance C2 both ends connect resistance R5 second ends and resistance R6 second respectively
End；The corresponding battery discharge modules of battery V3 include：Resistance R3, R6, R7, discharge tube M3 and capacitance C3, resistance R3 first ends connect
Connect battery V3 anodes and resistance R6 first ends, the connection discharge tube M3 drain electrodes of resistance R3 second ends, discharge tube M3 source electrodes connection battery
V3 cathodes and resistance R7 first ends, discharge tube M3 grids connection resistance R7 second ends, capacitance C3 both ends connect resistance R6 the respectively
Two ends and resistance R7 second ends.The ON-OFF control circuit U2 includes three switch k1, k2, k3 and comparison circuit U201, battery
V1 is to inductive switch k1, and battery V2 is to inductive switch k2, and battery V3 is to inductive switch k3.Switch both ends and the ratio of k1 both ends connection capacitance C1
Compared with circuit U 201, the both ends of switch k2 both ends connection capacitance C2 and comparison circuit U201 switch the both ends connection capacitance C3's of k3
Both ends and comparison circuit U201.Resistance R1 and discharge tube M1, R2 and discharge tube M2, R3 and discharge tube M3 can also use electric current respectively
Source is replaced, and a current source in parallel per batteries, when battery needs electric discharge, current source conduction, battery is discharged by current source.
The comparison circuit receives cell voltage V1, cell voltage V2 and cell voltage V3, and the cell voltage that will often economize on electricity is electric with threshold value respectively
Pressure Vref is compared, output comparison signal Q1, Q2 and Q3.
As shown in figure 3, the circuit diagram of comparison circuit U201 is illustrated, including：Comparator U301, comparator U302 and compare
Device U303, comparator U301 are by cell voltage V1 compared with reference voltage V ref, and comparator U302 is by cell voltage V2 and benchmark
Voltage Vref is compared, and comparator U303 is by cell voltage V3 compared with reference voltage V ref.When certain economize on electricity cell voltage, for example, V1
During ＞ Vref, comparison circuit output comparison signal Q1 controls switch k1 to be closed respectively, and battery V1 is powered on to be pressed on resistance R5 and generated
Pressure drop, discharge tube M1 conductings, battery V1 are discharged by resistance R1.After battery V1 discharges a period of time, switch k1 is disconnected, battery
V1 stops electric discharge.When battery V1, V2 are required to discharge, and switch k1, k2 are closed, resistance R5 both end voltage approximately equals, electricity
No electric current on R5 is hindered, thus two adjacent sections battery cannot discharge simultaneously.When balanced n batteries V1, V2 ..., Vn when, odd number
Batteries such as V1, V3, V5 ... can discharge simultaneously, even number batteries such as V2, V4, V6 ... can discharge simultaneously.When
When the prior art and the present invention will complete battery balanced within the T1 times, due to odd number batteries of the present invention and even number batteries
Equilibrium at times is needed, the resistance connected in the present invention with discharge tube is arranged to the one of corresponding resistor resistance value in the prior art
Half, euqalizing current is 2 times of euqalizing current in the prior art.
Application for n batteries, it is only necessary to n switch k1, k2 ..., kn；When ON-OFF control circuit U2 is switched
When being integrated in comparison circuit U3 in piece, it is only necessary to which n+1 chip pin, compared with prior art, present invention reduces chips
Design and the cost of encapsulation.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (11)
1. a kind of battery equalizing circuit, including：
ON-OFF control circuit, the ON-OFF control circuit receive battery voltage signal of the characterization per batteries both end voltage difference, when
When certain economize on electricity cell voltage reaches threshold voltage, then respective switch in ON-OFF control circuit is controlled to turn on, phase in ON-OFF control circuit
Two adjacent switches do not simultaneously turn on；
Battery discharging circuit, when some switch conduction in ON-OFF control circuit, corresponding discharge tube conducting in battery discharging circuit,
It is discharged with realizing respective battery, when two adjacent sections battery difference discharges.
2. battery equalizing circuit according to claim 1, it is characterised in that：For cascade multiple batteries, odd number economize on electricity
Pond can discharge simultaneously；Even number batteries can discharge simultaneously.
3. battery equalizing circuit according to claim 1, it is characterised in that：The ON-OFF control circuit includes comparison circuit
With with the one-to-one multiple switch of battery, the comparison circuit will often economize on electricity cell voltage respectively compared with threshold voltage,
Obtain corresponding comparison signal, control signal of the comparison signal as respective switch.
4. battery equalizing circuit according to claim 1 or 2, it is characterised in that：The ON-OFF control circuit is integrated in
In piece, the both ends each switched in the ON-OFF control circuit are drawn as chip pin.
5. battery equalizing circuit according to claim 1, it is characterised in that：The battery discharging circuit includes multiple electricity
Tank discharge module, a battery discharge module is corresponded to per batteries, and each battery discharge module and the multiple switch one are a pair of
It should connect.
6. battery equalizing circuit according to claim 4, it is characterised in that：The battery discharge module include discharge tube and
First resistor, the discharge tube and first resistor composition series circuit, the series circuit is connected in parallel on respective battery both ends, described
First resistor is used for giving battery discharge；When certain economize on electricity cell voltage reaches threshold voltage, the electric discharge in respective battery discharge module
Pipe is closed, corresponding battery discharge.
7. battery equalizing circuit according to claim 4, it is characterised in that：The battery discharge module includes the first electric current
Source, first current source are connected in parallel on respective battery both ends, and the first current source is used for battery discharge；Certain economize on electricity cell voltage reaches
During threshold voltage, the current source conduction in respective battery discharge module, corresponding battery discharge.
8. battery equalizing circuit according to claim 5 or 6, it is characterised in that：The battery discharge module further includes
Two resistance and 3rd resistor, the anode of second resistance first end connection battery and the series circuit first end, described the
Two resistance second ends connect the first end of respective switch in the ON-OFF control circuit；The 3rd resistor first end connection is corresponding
The cathode of battery and the series circuit second end, the 3rd resistor second end connect the control of discharge tube in the battery module of place
The second end of respective switch in end processed and the ON-OFF control circuit；One of battery discharge mould 3rd resistor conduct in the block
Second resistance in adjacent cell discharge module.
9. battery equalizing circuit according to claim 8, it is characterised in that：It is corresponding to discharge during one of switch conduction
Pressure drop is generated in mould 3rd resistor in the block corresponding discharge tube to be driven to turn on.
10. battery equalizing circuit according to claim 8 or claim 9, it is characterised in that：The battery discharge module further includes electricity
Hold, the capacitance both ends connect the second resistance second end and the 3rd resistor second end respectively, and are controlled with the switch
Corresponding switch in parallel in circuit processed；The second resistance, 3rd resistor and capacitance composition filter circuit.
11. a kind of battery balanced control method：
Cell voltage of the characterization per batteries both end voltage difference is received, when certain economize on electricity cell voltage reaches threshold voltage, is then controlled
Respective switch turns on, and two adjacent switches do not simultaneously turn on；During some switch conduction, corresponding discharge tube break-make, to realize
It discharges respective battery, when two adjacent sections battery difference discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711360761.8A CN108063473A (en) | 2017-12-15 | 2017-12-15 | Battery equalizing circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711360761.8A CN108063473A (en) | 2017-12-15 | 2017-12-15 | Battery equalizing circuit and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108063473A true CN108063473A (en) | 2018-05-22 |
Family
ID=62138748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711360761.8A Pending CN108063473A (en) | 2017-12-15 | 2017-12-15 | Battery equalizing circuit and control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108063473A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800436A (en) * | 2009-02-11 | 2010-08-11 | 凹凸电子（武汉）有限公司 | Circuit and method for cell balancing, and cell management system |
| CN101877423A (en) * | 2009-12-04 | 2010-11-03 | 北京华大智宝电子系统有限公司 | Chip for balance control of batteries |
| CN102195310A (en) * | 2010-03-12 | 2011-09-21 | 株式会社东芝 | Combination battery unit and vehicle |
| US20150035487A1 (en) * | 2013-08-02 | 2015-02-05 | Denso Corporation | Equalization device for assembled battery |
| CN207732462U (en) * | 2017-12-15 | 2018-08-14 | 杰华特微电子（杭州）有限公司 | Battery equalizing circuit |
-
2017
- 2017-12-15 CN CN201711360761.8A patent/CN108063473A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800436A (en) * | 2009-02-11 | 2010-08-11 | 凹凸电子（武汉）有限公司 | Circuit and method for cell balancing, and cell management system |
| CN101877423A (en) * | 2009-12-04 | 2010-11-03 | 北京华大智宝电子系统有限公司 | Chip for balance control of batteries |
| CN102195310A (en) * | 2010-03-12 | 2011-09-21 | 株式会社东芝 | Combination battery unit and vehicle |
| US20150035487A1 (en) * | 2013-08-02 | 2015-02-05 | Denso Corporation | Equalization device for assembled battery |
| CN207732462U (en) * | 2017-12-15 | 2018-08-14 | 杰华特微电子（杭州）有限公司 | Battery equalizing circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| CB02 | Change of applicant information |
Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |