CN208646650U - A kind of equalizing circuit of charged in parallel and selective single battery equalization discharge - Google Patents
A kind of equalizing circuit of charged in parallel and selective single battery equalization discharge Download PDFInfo
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- CN208646650U CN208646650U CN201820874512.4U CN201820874512U CN208646650U CN 208646650 U CN208646650 U CN 208646650U CN 201820874512 U CN201820874512 U CN 201820874512U CN 208646650 U CN208646650 U CN 208646650U
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- 238000005303 weighing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 15
- 239000000178 monomer Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- UREBDLICKHMUKA-CXSFZGCWSA-N dexamethasone Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)C[C@@H]2O UREBDLICKHMUKA-CXSFZGCWSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
The utility model relates to the equalizing circuits of a kind of charged in parallel and selective single battery equalization discharge, and the utility model is by battery pack, DC/DC converter, Mosfet switch, bus switch K with anti-paralleled diode1, bus switch K2, bus switch P1, bus switch P2, switch Q1, switch Q2, switch Q3, switch Q4It constitutes.Charged in parallel may be implemented in the utility model, the single battery is just isolated into charging circuit when any one single battery reaches the blanking voltage of setting, charge cutoff voltage of the final all single batteries all set by reach due to stops charging to reach the balanced purpose of pressure.Equalization discharge is carried out using a battery pack DC/DC converter in parallel to SOC in battery pack minimum single battery balanced, and when electric discharge can effectively reduce the inconsistency between each single battery.
Description
Technical field
The utility model relates to the equalizing circuits of a kind of charged in parallel and selective single battery equalization discharge, belong to electric power
Electronic technology and battery energy equalization technique field.
Background technique
With the development of the times, scientific and technological progress, environmental problem and energy crisis are on the rise, especially petroleum, coal
The exhaustive exploitation of equal fossil fuels and use, cause greenhouse effects to aggravate, and these non-renewable energy be it is non-renewable, also face
Exhausted problem.The Faced In Sustainable Development of the mankind huge challenge.Under the epoch of current economic rapid development, automobile at
While for main means of transport, the consumption of fossil energy is accelerated, the deterioration of environment is exacerbated.In order to solve these problems,
Every country is all seeking renewable energy and clean energy resource.In vehicle field, as tesla, BMW, Audi, BYD, etc. all exist
Greatly develop electric car.However the technology the most key for electric car is energy storage, the storage capacity of electric energy is directly made
About the development of electric car industry.With the rapid development of battery and battery management technique, lithium ion battery has energy close
Degree is big, nominal voltage is relatively high, memory-less effect, it is pollution-free the advantages that receive the favor in market, be widely used in electricity
In the energy storage of electrical automobile.
In order to meet the requirement of driving motor in electric automobile voltage and current, it has to a large amount of monomer lithium ion battery
Be together in series use.But in the production process due to 1, battery, due to technique etc., with capacity, the internal resistance etc. of batch battery
It has differences；2, the difference of battery self discharge rate, it is prolonged to accumulate, cause the difference of battery capacity；3, battery use process
In, use environment such as (temperature, the difference of circuit board) leads to the difference of battery capacity.Etc. these reasons can all cause electricity
Inconsistency between Chi Zuzhong single battery.The capacity of series-connected cell group is influenced by minimum cell capacity again, always
Each single battery between it is unbalanced can not only make the reduction for storing electricity that can also make the reduced service life of battery pack, therefore
Have to carry out balancing energy management to battery pack, at present also universal relatively low, the non-energy dissipative type of the equalization efficiency of equalization methods
Balance route again it is more complicated.
Summary of the invention
For energy between concatenated lithium ion single batteries a large amount of in the vehicle-mounted lithium-ion power battery system of electric car
Inconsistent problem, the utility model provide the equalizing circuit of a kind of charged in parallel and selective single battery equalization discharge.
The technical solution of the utility model is: the equilibrium electricity of a kind of charged in parallel and selective single battery equalization discharge
Road, by battery pack, DC/DC converter, Mosfet switch, bus switch K with anti-paralleled diode1, bus switch K2, bus
Switch P1, bus switch P2, switch Q1, switch Q2, switch Q3, switch Q4It constitutes；
The battery pack is by n single battery CiComposition, the Mosfet switch with anti-paralleled diode are anti-by n band
The Mosfet switch M of parallel diodei, n Mosfet switch N with anti-paralleled diodei, n-1 is with anti-paralleled diode
Mosfet switch SjComposition；Wherein, j=1,2,3..., n-1, i=1,2,3..., n；
The single battery CiAnode with the Mosfet switch M with anti-paralleled diodeiSource electrode be connected, band inverse parallel
The Mosfet switch M of diodeiDrain electrode connect in battery anode bus L1Above and by bus switch K1, bus switch P1Control
Bus L1On-off；Single battery CiCathode and the Mosfet switch N with anti-paralleled diodeiDrain electrode be connected, band inverse parallel two
The Mosfet switch N of pole pipeiSource electrode connect in battery electrode bus L2Above and by bus switch K2, bus switch P2Control is total
Line L2On-off；The Mosfet switch S of n-1 anti-paralleled diodejSource electrode and single battery CjCathode and with two pole of inverse parallel
The Mosfet switch N of pipejDrain electrode be connected, the Mosfet switch S of n-1 anti-paralleled diodejDrain electrode and single battery Cj+1
Anode and Mosfet switch M with anti-paralleled diodej+1Source electrode be connected；DC/DC converter input anode and first
A single battery C1Anode on and by switch Q1On-off is controlled, the cathode of DC/DC converter input is simultaneously electric in the last one monomer
Pond CnCathode on and by switch Q2On-off is controlled, the anode of DC/DC converter output connects by n single battery CiComposition
The positive bus L of battery pack1Above and by switch Q3On-off is controlled, the cathode of DC/DC converter output connects by n single battery
CiThe negative bus L of the battery pack of composition2Above and by switch Q4Control on-off；Bus switch K1It connects with anti-paralleled diode
Mosfet switch M1Drain electrode and external power supply/load connection anode between, bus switch P1It connects with anti-paralleled diode
Mosfet switch M1Source electrode and external power supply/load connection anode between；Bus switch K2It connects with anti-paralleled diode
Mosfet switch N1Source electrode and external power supply/load connection negative terminal between, bus switch P2It connects in the last one single battery Cn
Between cathode and external power supply/load connection negative terminal.
When the equalizing circuit carries out charge balancing, all single batteries are directly parallel on power supply, if some monomer
Battery CiWhen reaching the charge cutoff voltage of setting, then control and single battery CiIt is concatenated with anti-paralleled diode
Mosfet switch Mi, Mosfet switch N with anti-paralleled diodeiIt disconnects, thus by single battery CiIsolate charging circuit.
When the equalizing circuit carries out equalization discharge, when equalizing circuit carries out charge balancing, if some single battery Ci's
Voltage ViWith battery pack average voltage VavDifference △ V >=β when, then control with single battery CiConcatenated two pole of band inverse parallel
The Mosfet switch M of pipei, Mosfet switch N with anti-paralleled diodeiIt connects, gives the single battery by DC/DC converter
CiEquilibrium, to keep the consistency of each single battery；
Wherein,△ V=Vav—Vi, β expression threshold value.
The beneficial effects of the utility model are: charged in parallel may be implemented in the utility model, when any one single battery
The single battery is just isolated into charging circuit when reaching the blanking voltage of setting, final all single batteries are all because set by reaching
Fixed charge cutoff voltage and stop charging to reach the balanced purpose of pressure.Equalization discharge uses one DC/ of battery pack parallel connection
To SOC in battery pack, (state-of-charge is also remaining capacity to DC converter, and representative is that battery is shelved using a period of time or for a long time
The ratio of the capacity of residual capacity after not having to and its fully charged state, commonly using percentage indicates) minimum single battery into
Row is balanced, and when electric discharge can effectively reduce the inconsistency between each single battery.It can be apparent by the equalizing circuit
Additional equalizing circuit is not needed when improving the speed of charging, and charging to keep the consistency of each single battery, and electric discharge is equal
Weighing apparatus selectivity gives monomer battery voltage and battery pack average voltage V in battery packavDifference is more than or equal to the monomer of given threshold β
Battery CiIt carries out balanced.The equalizing circuit principle is simple, and control is easy, and is not necessarily to high-frequency pulsed width modulation, and equalization efficiency is high.Battery pack
For the battery pack of n single battery composition, and the parity of n does not influence battery pack structure, facilitates expansion circuit structure.
Detailed description of the invention
Fig. 1 is a kind of equalizing circuit principle based on charged in parallel and selective single battery equalization discharge of the utility model
Figure；
Fig. 2 is the charging balanced circuit schematic diagram of n single battery；
Fig. 3 is the discharge equalizing circuit schematic diagram of n single battery；
Fig. 4 is the charging balanced circuit schematic diagram of 5 single batteries；
Fig. 5 is 5 single battery charge balancing equivalent circuit diagrams；
Fig. 6 is the discharge equalizing circuit schematic diagram of 5 single batteries；
Fig. 7 is 5 single battery equalization discharge equivalent circuit diagrams；
Wherein, as shown in the picture, grey parts are off-state, and black portions are conducting or working condition.
Specific embodiment
Embodiment 1: as shown in Figure 1, the equalizing circuit of a kind of charged in parallel and selective single battery equalization discharge, by electricity
Pond group, DC/DC converter, Mosfet switch, bus switch K with anti-paralleled diode1, bus switch K2, bus switch P1、
Bus switch P2, switch Q1, switch Q2, switch Q3, switch Q4It constitutes；
The battery pack is by n single battery CiComposition, the Mosfet switch with anti-paralleled diode are anti-by n band
The Mosfet switch M of parallel diodei, n Mosfet switch N with anti-paralleled diodei, n-1 is with anti-paralleled diode
Mosfet switch SjComposition；Wherein, j=1,2,3..., n-1, i=1,2,3..., n；
The single battery CiAnode with the Mosfet switch M with anti-paralleled diodeiSource electrode be connected, band inverse parallel
The Mosfet switch M of diodeiDrain electrode connect in battery anode bus L1Above and by bus switch K1, bus switch P1Control
Bus L1On-off；Single battery CiCathode and the Mosfet switch N with anti-paralleled diodeiDrain electrode be connected, band inverse parallel two
The Mosfet switch N of pole pipeiSource electrode connect in battery electrode bus L2Above and by bus switch K2, bus switch P2Control is total
Line L2On-off；The Mosfet switch S of n-1 anti-paralleled diodejSource electrode and single battery CjCathode and with two pole of inverse parallel
The Mosfet switch N of pipejDrain electrode be connected, the Mosfet switch S of n-1 anti-paralleled diodejDrain electrode and single battery Cj+1
Anode and Mosfet switch M with anti-paralleled diodej+1Source electrode be connected；DC/DC converter input anode and first
A single battery C1Anode on and by switch Q1On-off is controlled, the cathode of DC/DC converter input is simultaneously electric in the last one monomer
Pond CnCathode on and by switch Q2On-off is controlled, the anode of DC/DC converter output connects by n single battery CiComposition
The positive bus L of battery pack1Above and by switch Q3On-off is controlled, the cathode of DC/DC converter output connects by n single battery
CiThe negative bus L of the battery pack of composition2Above and by switch Q4Control on-off；Bus switch K1It connects with anti-paralleled diode
Mosfet switch M1Drain electrode and external power supply/load connection anode between, bus switch P1It connects with anti-paralleled diode
Mosfet switch M1Source electrode and external power supply/load connection anode between；Bus switch K2It connects with anti-paralleled diode
Mosfet switch N1Source electrode and external power supply/load connection negative terminal between, bus switch P2It connects in the last one single battery Cn
Between cathode and external power supply/load connection negative terminal.
The control process of the utility model is:
It is controlled including charge balancing and equalization discharge:
Charge balancing: turn-on bus switch K1, bus switch K2, electric current walks charge circuit, control bus switch P1, bus
Switch P2For off-state；Control switch Q1, switch Q2, switch Q3, switch Q4It is in an off state, by DC/DC converter switches
Completely isolated circuit out；The single battery C in entire charging process1、C2、C3...CnIt is parallel connection: when some monomer
Battery CiWhen reaching set charge cutoff voltage, then control and single battery CiIt is concatenated with anti-paralleled diode
Mosfet switch Mi, Mosfet switch N with anti-paralleled diodeiIt disconnects, thus by single battery CiCharging circuit is isolated,
Until final all single batteries all reach charge cutoff voltage, all single batteries isolate charging circuit at this time, charging
Circuit is off-state；Charge cutoff voltage of the final all single batteries all set by reach due to, stops charging to reach
Force balanced purpose；
Equalization discharge: interrupt bus switch K1, bus switch K2, electric current walks load circuit, turn-on bus switch P1, bus
Switch P2；Connect the Mosfet switch S with anti-paralleled diode1、S2、S3...Sn-1, the Mosfet of disconnecting strip anti-paralleled diode
Switch M1、M2、M3、...Mn, the Mosfet switch N of disconnecting strip anti-paralleled diode1、N2、N3、...Nn；Connect switch Q1, switch
Q2, switch Q3, switch Q4；If some single battery CiVoltage ViWith battery pack average voltage VavDifference △ V >=β when, then control
System and single battery CiThe concatenated Mosfet switch M with anti-paralleled diodei, with anti-paralleled diode Mosfet switch
NiIt connects, gives single battery C by DC/DC converteriEquilibrium, to keep the consistency of each single battery；
Wherein,△ V=Vav—Vi, β expression threshold value.
For the battery pack being made of n single battery (such as Fig. 1), battery pack connects during the charging process (such as Fig. 2)
Logical bus switch (K1、K2) at this time because being charged state (i.e. external power supply charges to battery pack), electric current walks charge circuit, control
Bus switch (P processed1、P2) it is off-state.Additional equalizing circuit is not needed in charging process, so control switch (Q1、Q2、
Q3、Q4) be in an off state, the completely isolated circuit out of DC/DC converter.The single battery C in entire charging process1、C2、
C3...CnIt is parallel connection, as some single battery CiWhen reaching set charge cutoff voltage, then control and the monomer
Battery Ci(i=1,2,3..., n) concatenated two Mosfet switch M with anti-paralleled diodei(i=1,2,3..., n), Ni
(i=1,2,3..., n) is disconnected, thus by single battery CiCharging circuit is isolated, achievees the purpose that protect the single battery.
As another single battery CxIt is then controlled and the single battery C when also reaching set charge cutoff voltagex(x=1,2,
3..., n) concatenated two Mosfet switch M with anti-paralleled diodex(x=1,2,3..., n), Nx(x=1,2,3..., n)
It disconnects, thus by single battery CxCharging circuit is isolated, until final all single batteries all reach charge cutoff voltage, this
Shi Suoyou single battery isolates charging circuit, and charging circuit is off-state.Final all single batteries are all because reaching
The charge cutoff voltage of setting and stop charging to reach the balanced purpose of pressure.
Battery pack disconnects bus switch (K during discharge (such as Fig. 3)1、K2), at this time because being discharge condition (i.e. battery
Group is to load discharge), electric current walks load circuit, always opens up pass (P so connecting1、P2).It is required that each single battery series connection, so
It connects the Mosfet with anti-paralleled diode and switchs (S1、S2、S3...Sn-1), the Mosfet switch of disconnecting strip anti-paralleled diode
(M1、M2、M3、...Mn)、(N1、N2、N3、...Nn).Discharge process need to access DC/ to keep the consistency of each single battery
DC converter carries out balanced, connection switch (Q1、Q2、Q3、Q4).At this time the input anode of DC/DC converter connect battery pack just
On extremely, DC/DC converter input cathode is connect on battery electrode.Output head anode passes through Q3Closure connect in battery pack bus
L1On, negative pole of output end passes through Q4Closure connect in battery pack bus L2On, if some single battery C during dischargei(i=
1,2,3..., n) voltage ViWith battery pack average voltage (Vav,) difference (Δ V, Δ V=
Vav-Vi) be more than or equal to given threshold β when (that is, △ V >=β), then control with single battery Ci(i=1,2,3..., n) series connection
Two Mosfet switch M with anti-paralleled diodei(i=1,2,3..., n), Ni(i=1,2,3..., n) is connected, and is passed through
DC/DC converter gives single battery CiEquilibrium, to keep the consistency of each single battery.
By taking 5 single batteries as an example:
(such as Fig. 4,5) during the charging process, it is assumed that the sequence that single battery reaches charge cutoff voltage is followed successively by C3、C1、
C2、C4、C5, then physical circuit control process is as follows: turn-on bus switchs (K1、K2) at this time because being charged state (i.e. external electrical
Charge to battery pack in source), electric current walks charge circuit, so control bus switchs (P1、P2) it is off-state.In charging process not
Additional equalizing circuit is needed, so control switch (Q1、Q2、Q3、Q4) be in an off state, DC/DC converter is completely isolated
Circuit out.The single battery C in entire charging process1、C2、C3、C4、C5It is parallel connection, (1), as single battery C3Reach
When set charge cutoff voltage, then control and single battery C3The concatenated two Mosfet switches with anti-paralleled diode
M3、N3It disconnects, thus by single battery C3Charging circuit is isolated, achievees the purpose that protect the single battery.(2), when monomer electricity
Pond C1When reaching set charge cutoff voltage, then control and single battery C1Concatenated two with anti-paralleled diode
Mosfet switch M1、N1It disconnects, thus by single battery C1Isolate charging circuit.(3), as single battery C2Reach set
When charge cutoff voltage, then control and single battery C2The concatenated two Mosfet switch M with anti-paralleled diode2、N2It is disconnected
It opens, thus by single battery C2Isolate charging circuit.(4), as single battery C4When reaching set charge cutoff voltage,
Then control and single battery C4The concatenated two Mosfet switch M with anti-paralleled diode4、N4It disconnects, thus by monomer electricity
Pond C4Isolate charging circuit.(5), as single battery C5When reaching set charge cutoff voltage, then control and the monomer are electric
Pond C5The concatenated two Mosfet switch M with anti-paralleled diode5、N5It disconnects, thus by single battery C5Isolate charging electricity
Road.Final all single batteries isolate charging circuit, and charging circuit is off-state；All single batteries are all because reaching
The charge cutoff voltage of setting and to stop charging balanced to reach pressure.
(such as Fig. 6,7) assumes single battery C during discharge3Voltage V3With battery pack average voltage (Vav) difference
When Δ V is more than or equal to given threshold β, a DC/DC converter through battery pack parallel connection gives the battery electric energy supplement, realizes whole
The energy of body to single single battery is converted, to keep the consistency of each single battery in battery pack, achievees the purpose that equilibrium.
Physical circuit control process is as follows: disconnecting bus switch (K1、K2), at this time because being that (i.e. battery pack puts load to discharge condition
Electricity), electric current walks load circuit, so turn-on bus switchs (P1、P2).It is required that each single battery series connection, so it is anti-simultaneously to connect band
The Mosfet of union II pole pipe switchs (S1、S2、S3、S4、S5), the Mosfet of disconnecting strip anti-paralleled diode switchs (M1、M2、M3、M4、
M5)、(N1、N2、N3、N4、N5).In order to keep the consistency of each single battery, access DC/DC converter carries out equal discharge process
Weighing apparatus connects switch (Q1、Q2、Q3、Q4).The input anode of DC/DC converter connects on battery anode at this time, DC/DC transformation
Device input cathode connects on battery electrode.Output head anode passes through Q3Closure connect in battery pack bus L1On, negative pole of output end
Pass through Q4Closure connect in battery pack bus L2On, battery C during discharge3Voltage V3With battery pack average voltage (Vav,) difference (Δ V, Δ V=Vav-V3) be more than or equal to given threshold β when (that is, △ V >=β) control
System and single battery C3The concatenated two Mosfet switch M with anti-paralleled diode3、N3It connects, passes through DC/DC converter
Give single battery C3Equilibrium, to keep the consistency of each single battery.
The specific embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the utility model is not
Be limited to above embodiment, within the knowledge of a person skilled in the art, can also do not depart from it is practical
Various changes can be made under the premise of novel objective.
Claims (3)
1. the equalizing circuit of a kind of charged in parallel and selective single battery equalization discharge, it is characterised in that: by battery pack, DC/
DC converter, Mosfet switch, bus switch K with anti-paralleled diode1, bus switch K2, bus switch P1, bus switch
P2, switch Q1, switch Q2, switch Q3, switch Q4It constitutes；
The battery pack is by n single battery CiComposition, the Mosfet switch with anti-paralleled diode is by n band inverse parallel
The Mosfet switch M of diodei, n Mosfet switch N with anti-paralleled diodei, n-1 is with anti-paralleled diode
Mosfet switch SjComposition；
The single battery CiAnode with the Mosfet switch M with anti-paralleled diodeiSource electrode be connected, band two pole of inverse parallel
The Mosfet switch M of pipeiDrain electrode connect in battery anode bus L1Above and by bus switch K1, bus switch P1Control bus L1
On-off；Single battery CiCathode and the Mosfet switch N with anti-paralleled diodeiDrain electrode be connected, with anti-paralleled diode
Mosfet switch NiSource electrode connect in battery electrode bus L2Above and by bus switch K2, bus switch P2Control bus L2It is logical
It is disconnected；The Mosfet switch S of n-1 anti-paralleled diodejSource electrode and single battery CjCathode and with anti-paralleled diode
Mosfet switch NjDrain electrode be connected, the Mosfet switch S of n-1 anti-paralleled diodejDrain electrode and single battery Cj+1Just
Pole and Mosfet switch M with anti-paralleled diodej+1Source electrode be connected；DC/DC converter input anode and in first list
Body battery C1Anode on and by switch Q1Control on-off, DC/DC converter input cathode and in the last one single battery Cn
Cathode on and by switch Q2On-off is controlled, the anode of DC/DC converter output connects by n single battery CiThe battery of composition
The positive bus L of group1Above and by switch Q3On-off is controlled, the cathode of DC/DC converter output connects by n single battery CiGroup
At battery pack negative bus L2Above and by switch Q4Control on-off；Bus switch K1It connects with anti-paralleled diode
Mosfet switch M1Drain electrode and external power supply/load connection anode between, bus switch P1It connects with anti-paralleled diode
Mosfet switch M1Source electrode and external power supply/load connection anode between；Bus switch K2It connects with anti-paralleled diode
Mosfet switch N1Source electrode and external power supply/load connection negative terminal between, bus switch P2It connects in the last one single battery Cn
Between cathode and external power supply/load connection negative terminal；
Wherein, j=1,2,3..., n-1, i=1,2,3..., n.
2. the equalizing circuit of charged in parallel according to claim 1 and selective single battery equalization discharge, feature exist
In: when the equalizing circuit carries out charge balancing, all single batteries are directly parallel on power supply, if some single battery Ci
When reaching the charge cutoff voltage of setting, then control and single battery CiThe concatenated Mosfet switch with anti-paralleled diode
Mi, Mosfet switch N with anti-paralleled diodeiIt disconnects, thus by single battery CiIsolate charging circuit.
3. the equalizing circuit of charged in parallel according to claim 1 and selective single battery equalization discharge, feature exist
In: when the equalizing circuit carries out equalization discharge, when equalizing circuit carries out charge balancing, if some single battery CiVoltage Vi
With battery pack average voltage VavDifference △ V >=β when, then control with single battery CiIt is concatenated with anti-paralleled diode
Mosfet switch Mi, Mosfet switch N with anti-paralleled diodeiIt connects, gives single battery C by DC/DC converteri?
Weighing apparatus, to keep the consistency of each single battery；
Wherein,△ V=Vav—Vi, β expression threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820874512.4U CN208646650U (en) | 2018-06-06 | 2018-06-06 | A kind of equalizing circuit of charged in parallel and selective single battery equalization discharge |
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| CN201820874512.4U CN208646650U (en) | 2018-06-06 | 2018-06-06 | A kind of equalizing circuit of charged in parallel and selective single battery equalization discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583347A (en) * | 2018-06-06 | 2018-09-28 | 昆明理工大学 | A kind of equalizing circuit and its control method of charged in parallel and selective single battery equalization discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583347A (en) * | 2018-06-06 | 2018-09-28 | 昆明理工大学 | A kind of equalizing circuit and its control method of charged in parallel and selective single battery equalization discharge |
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