CN109638926A - Compensation circuit for energy storage system, energy storage system and control method - Google Patents
Compensation circuit for energy storage system, energy storage system and control method Download PDFInfo
- Publication number
- CN109638926A CN109638926A CN201910055341.1A CN201910055341A CN109638926A CN 109638926 A CN109638926 A CN 109638926A CN 201910055341 A CN201910055341 A CN 201910055341A CN 109638926 A CN109638926 A CN 109638926A
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- battery pack
- battery
- compensator
- switch
- manager
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- 238000004146 energy storage Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005611 electricity Effects 0.000 claims description 20
- 239000013589 supplement Substances 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001502 supplementing effect Effects 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a compensation circuit, an energy storage system and a control method for the energy storage system, wherein the energy storage system comprises a battery manager (4), a first battery pack (1) and positive and negative leads for connecting the first battery pack with the outside, and is characterized in that the compensation circuit comprises a second battery pack (2) and a compensator (3) connected with the battery manager, the compensator is used for direct current conversion, a third manual switch QF3 is arranged between the compensator and the second battery pack, and the battery manager controls the charging or discharging of the second battery pack and the first battery pack; compared with the prior art, the invention effectively solves the problem that the energy storage system cannot work after being placed for a long time under low voltage and fails, only a small amount of original devices are added on the basis of the original circuit, and the invention has the advantages of reliable work, simple structure and low cost.
Description
Technical field
The present invention relates to energy-storage systems more particularly to a kind of for the compensation circuit of energy-storage system, energy-storage system and control
Method.
Background technique
The energy storage units of energy-storage system generally comprise multiple batteries or mould group, since lithium battery itself has self discharge
Characteristic, placing for a long time under low pressure when energy-storage system can make system self discharge serious, discharge it is serious after electricity in lithium battery
Become seldom.Due to needing to keep certain lithium ion to be just able to maintain the stabilization of structure in battery cathode, over-discharge makes more lithiums
Ion is moved out, and the rock-steady structure of cathode is destroyed, and causes the irreversible damage of cathode.Self-discharge of battery seriously can, control system
It does not instruct in the charging and discharging of respective external, even into state of paralysis, can not independently resume work so as to cause energy-storage system.
Therefore, it needs in the industry to develop a kind of compensation circuit, power compensation can be carried out when energy-storage system self discharge is serious,
Energy-storage system is set to restore to work normally.
Summary of the invention
In order to solve the self discharge existing in the prior art defect that seriously rear system can not independently be restored, the present invention is proposed
It is a kind of for the compensation circuit of energy-storage system, energy-storage system and control method.
The technical solution adopted by the present invention is that designing a kind of compensation circuit for energy-storage system, one kind being used for energy-storage system
Compensation circuit, the energy-storage system include battery manager, the first battery pack and connection the first battery pack with outside it is positive and negative
Polar conductor, which is characterized in that the compensation circuit includes the second battery pack, the compensator connecting with battery manager, the benefit
Device is repaid for DC converting, third manual switch QF3, the battery manager are equipped between the compensator and the second battery pack
Control the charge or discharge of the second battery pack and the first battery pack.
The second manual switch QF2 is equipped between the compensator and the positive and negative polarity wire.
The third manual switch QF3 is in parallel with first switch K1, and the first switch K1 is controlled by battery manager.
First manual switch QF1 is concatenated on the positive wire and cathode conductor, is leaning on conducting wire external interface side just
The second manual switch QF2 is concatenated between polar conductor and cathode conductor and the compensator, is leaning on conducting wire external interface just
Second switch K2 is concatenated on polar conductor or cathode conductor, is concatenated on the positive wire or cathode conductor by the first battery pack side
Third switch K3, the second switch K2 and third switch K3 are controlled by battery manager.
The compensation circuit further includes touch display screen, which is powered by the compensator.
Equalizing circuit is equipped in the battery manager, in third manual switch QF3 closure, second battery pack can
Equalizing circuit in compensator and battery manager is passed sequentially through to the first battery pack electric energy supplement.
The invention discloses a kind of energy-storage system, the energy-storage system uses above-mentioned compensation circuit.
The invention discloses the control methods of the energy-storage system, comprising the following steps: when the first battery pack works normally
When, battery manager controls the first battery pack and external connection carries out charge or discharge；When the first battery pack over-discharge can not be normal
When starting, battery manager controls the second battery pack and passes sequentially through compensator and battery manager to the first battery pack supplement electricity
Can, enable the connection of the first battery pack is external to work normally again when the voltage of the first battery pack is higher than over-discharge threshold value.
The control method enables the following steps are included: be first closed first manual switch QF1 and the second manual switch QF2
One battery pack connects compensator, and compensator is powered to touch display screen and battery manager, by whether observing touch display screen
It is electric judge the first battery pack whether overdischarge.
It is closed third manual switch QF3 after judging the first battery pack overdischarge, the second battery pack is passed through into compensator
Interim connection battery manager, battery manager obtain it is electric after control first switch K1 closure, the second battery pack is connected into compensator.
Enabling the second battery pack, to before the first battery pack electric energy supplement, whether the voltage for first detecting the second battery pack is higher than
Threshold value, if so, then enabling the second battery pack to the first battery pack electric energy supplement；If not, being filled with external power supply to the second battery pack
Electricity enables the second battery pack to the first battery pack electric energy supplement again when the voltage of the second battery pack is higher than threshold value.
The control method the following steps are included: step 1. be closed first manual switch QF1 and the second manual switch QF2,
First battery pack connects compensator and is powered by compensator to touch display screen；Step 2. judges compensator and touches display
Screen whether it is electric, as it is electric, then go to step 6；Step 3. is closed third manual switch QF3；Step 4. compensator touches display
Screen and battery manager obtain electric；Step 5. battery manager controls first switch K1 closure；Step 6. battery manager detection the
Whether the voltage of two battery packs is greater than threshold value, if so, then going to step 8；Step 7. battery manager is closed second switch K2, disconnects
Third switch K3, external power supply charge to the second battery pack, go to step 6；Step 8. battery manager detects the first battery pack
Whether voltage is greater than over-discharge threshold value, if so, then going to step 10；Second battery pack of step 9. passes sequentially through compensator and battery management
Equalizing circuit inside device goes to step 8 to the first battery pack electric energy supplement；Step 10. is closed second switch K2 and third switch
K3, disconnects first switch K1, and starting terminates.
After the starting, the electricity of the second battery pack is detected, when the electricity of the second battery pack is lower than power threshold,
Control compensator charges to the second battery pack, its electricity is made to reach setting value.
Compared with prior art, place that break down can not work under effective solution of the present invention energy-storage system low pressure for a long time
The problem of making only increases a small amount of prototype part on the basis of original circuit, has reliable operation, structure is simple, low in cost
The advantages of.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is present pre-ferred embodiments functional block diagram；
Fig. 2 is present pre-ferred embodiments control flow chart.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is described in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting the present invention.
Second battery pack 2 is arranged in the present invention, for supplementing electricity to the first battery pack 1 after 1 over-discharge of the first battery pack
Can, it is allowed to work back to normal.
The invention discloses a kind of compensation circuit for energy-storage system, a kind of compensation circuit for energy-storage system, institute
Stating energy-storage system includes battery manager 4, the first battery pack 1 and the first battery pack of connection and external positive and negative polarity wire, spy
Sign is that the compensation circuit includes the second battery pack 2, and the compensator 3 connecting with battery manager, the compensator is for straight
Rheology is changed, and third manual switch QF3, second electricity of battery manager control are equipped between the compensator and the second battery pack
The charge or discharge of Chi Bao and the first battery pack.The second manual switch is equipped between the compensator 3 and the positive and negative polarity wire
QF2.When 1 over-discharge of the first battery pack can not normally start, battery manager 4 controls the second battery pack 2 and passes sequentially through compensator 3
With battery manager 4 to 1 electric energy supplement of the first battery pack, first is enabled again when the voltage of the first battery pack 1 is higher than over-discharge threshold value
Battery pack 1 connects external normal work.
Referring to preferred embodiment shown in fig. 1, the third manual switch QF3 is in parallel with first switch K1, and described first
Switch K1 is controlled by battery manager 4.First manual switch QF1 is concatenated on the positive wire and cathode conductor, is leaning on conducting wire
The second manual switch QF2 is concatenated between the positive wire and cathode conductor of external interface side and the compensator 3, is being leaned on
Second switch K2 is concatenated on the positive wire or cathode conductor of conducting wire external interface, is led in the anode by 1 side of the first battery pack
Third switch K3, the second switch K2 and third switch K3 is concatenated on line or cathode conductor to be controlled by battery manager 4.It is described
Compensation circuit further includes touch display screen 5, which is powered by the compensator 3.It is set in the battery manager 4
There is equalizing circuit, in third manual switch QF3 closure, second battery pack 2 can pass sequentially through compensator 3 and cell tube
The equalizing circuit in device 4 is managed to 1 electric energy supplement of the first battery pack.
When the first battery pack 1 works normally, compensator 3 takes electricity from the first battery pack 1, supplies electricity to battery manager
4BMS, touch display screen 5, and charge or discharge are carried out to the first battery pack 1 by sending instructions under touch display screen 5.At this time
A manual switch QF1 and the second manual switch QF2, second switch K2 and third switch K3 are closure conducting, the first battery pack 1
Electric energy access can be carried out with outside.In charging, after voltage difference reaches certain value between battery, BMS starts equalization function,
Pressure difference battery is carried out balanced, pressure difference is in a certain range between finally making battery.
When the first battery pack 1 is because the time stands when leading to occur battery over-discharge, compensator 3 can take from the second battery pack 2
Electricity supplies electricity to BMS, and BMS is that the first battery pack 1 charges using the equalizing circuit of itself, finally makes the event of the first battery pack 1
Barrier is eliminated, to make system worked well.
The invention discloses a kind of energy-storage system, the energy-storage system uses above-mentioned compensation circuit.
The invention discloses the control methods of the energy-storage system, comprising the following steps: when the first battery pack 1 works normally
When, first battery pack of the control of battery manager 41 carries out charge or discharge with external connection；When 1 over-discharge of the first battery pack can not be just
Often when starting, battery manager 4 controls the second battery pack 2 and passes sequentially through compensator 3 and battery manager 4 to the first battery pack 1
Electric energy supplement enables the first battery pack 1 connect external normal work again when the voltage of the first battery pack 1 is higher than over-discharge threshold value.
The control method enables the following steps are included: be first closed first manual switch QF1 and the second manual switch QF2
One battery pack 1 connects compensator 3, and compensator 3 is powered to touch display screen 5 and battery manager 4, by observing touch display screen
5 whether it is electric judge the first battery pack 1 whether overdischarge.
It is closed third manual switch QF3 after judging 1 overdischarge of the first battery pack, the second battery pack 2 is passed through into compensation
Device 3 temporarily connection battery manager 4, battery manager 4 it is electric after control first switch K1 closure, the second battery pack 2 is connected
Compensator 3.
Enable the second battery pack 2 to before 1 electric energy supplement of the first battery pack, first detect the second battery pack 2 voltage whether
Higher than threshold value, if so, then enabling the second battery pack 2 to 1 electric energy supplement of the first battery pack；If not, electric to second with external power supply
2 charging of pond packet, enables the second battery pack 2 to 1 electric energy supplement of the first battery pack again when the voltage of the second battery pack 2 is higher than threshold value.
Referring to Fig. 2 shows preferred embodiment flow chart, the control method is the following steps are included: step 1. closure the
A manual switch QF1 and the second manual switch QF2, the first battery pack 1 connect compensator 3 and are shown by compensator 3 to touch
5 power supply of screen；Step 2. judge compensator 3 and touch display screen 5 whether it is electric, such as it is electric, then go to step 6；Step 3. closure
Third manual switch QF3；Step 4. compensator 3, touch display screen 5 and battery manager 4 obtain electric；Step 5. battery manager 4
Control first switch K1 closure；Whether the voltage that step 6. battery manager 4 detects the second battery pack 2 is greater than threshold value, if so, then
Go to step 8；Step 7. battery manager 4 is closed second switch K2, disconnects third switch K3, and external power supply is to the second battery pack 2
Charging, goes to step 6；Whether the voltage that step 8. battery manager 4 detects the first battery pack 1 is greater than over-discharge threshold value, if so, then turning
Step 10；Second battery pack of step 9. 2 passes sequentially through the equalizing circuit inside compensator 3 and battery manager 4 to the first battery
Failure can be released after wrapping general 30 min of 1 electric energy supplement, goes to step 8；Step 10. is closed second switch K2 and third switch K3,
First switch K1 is disconnected, starting terminates.
After the starting, the electricity of the second battery pack 2 is detected, when the electricity of the second battery pack 2 is lower than power threshold
When, control compensator 3 charges to the second battery pack 2, its electricity is made to reach setting value.Guarantee the electricity in the second battery pack 2 whereby
Amount is sufficient, can be at any time to 1 electric energy supplement of the first battery pack.
It should be understood that the threshold value, over-discharge threshold value, power threshold, setting value, according to different energy-storage systems, different model
Battery, parameter value will be different, herein without limitation.
Above embodiments are by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications or change of progress, shall be included in the scope of claims of this application.
Claims (13)
1. a kind of compensation circuit for energy-storage system, the energy-storage system includes battery manager (4), the first battery pack (1)
With the first battery pack of connection and external positive and negative polarity wire, which is characterized in that the compensation circuit includes the second battery pack (2),
The compensator (3) connecting with battery manager, the compensator is used for DC converting, between the compensator and the second battery pack
Equipped with third manual switch QF3, the charge or discharge of battery manager control second battery pack and the first battery pack.
2. compensation circuit as described in claim 1, which is characterized in that between the compensator (3) and the positive and negative polarity wire
Equipped with the second manual switch QF2.
3. compensation circuit as claimed in claim 2, which is characterized in that the third manual switch QF3 and first switch K1 are simultaneously
Connection, the first switch K1 are controlled by battery manager (4).
4. compensation circuit as claimed in claim 3, which is characterized in that concatenated on the positive wire and cathode conductor first-hand
Switch QF1 is moved, is equipped with the first wiring point C1 in the positive wire section between first manual switch QF1 and conducting wire external interface,
The second wiring point C2 is equipped in cathode conductor section between first manual switch QF1 and conducting wire external interface, described first connects
The second manual switch QF2 is concatenated between line point C1 and the second wiring point C2 and the compensator (3), in the first wiring point C1
It is concatenated in the positive wire section of the external interface or in the second wiring point C2 and the cathode conductor section of the external interface
Second switch K2, in the positive wire section of the first wiring point C1 and first battery pack or the second wiring point C2 and institute
It states and concatenates third switch K3, the second switch K2 and third switch K3 in the cathode conductor section of the first battery pack by battery management
Device (4) control.
5. compensation circuit as described in claim 1, which is characterized in that further include touch display screen (5), the touch display screen by
Compensator (3) power supply.
6. compensation circuit as described in claim 1, which is characterized in that equalizing circuit is equipped in the battery manager (4),
When third manual switch QF3 is closed, second battery pack (2) can pass sequentially through equal in compensator (3) and battery manager
Circuit weigh to the first battery pack (1) electric energy supplement.
7. a kind of energy-storage system, which is characterized in that the energy-storage system is using compensation electricity as claimed in any one of claims 1 to 6
Road.
8. a kind of control method applied to energy-storage system, which comprises the following steps:
When the first battery pack (1) works normally, battery manager (4) control the first battery pack and external connection carry out charging or
Electric discharge；
When the first battery pack over-discharge can not normally start, battery manager control the second battery pack (2) passes sequentially through compensator
(3) and battery manager is to the first battery pack electric energy supplement, enables first again when the voltage of the first battery pack is higher than over-discharge threshold value
Battery pack connection is external to be worked normally.
9. control method as claimed in claim 8, which comprises the following steps: be first closed first manual switch QF1
With the second manual switch QF2, the first battery pack (1) is enabled to connect compensator (3), compensator is to touch display screen (5) and cell tube
Manage device (4) power supply, by observation touch display screen whether it is electric judge the first battery pack whether overdischarge.
10. control method as claimed in claim 9, which is characterized in that be closed after judging the first battery pack (1) overdischarge
Second battery pack (2) are temporarily connected battery manager (4) by compensator (3), battery manager by third manual switch QF3
It is electric after control first switch K1 closure, by the second battery pack connect compensator.
11. control method as claimed in claim 10, which is characterized in that enable the second battery pack (2) to the first battery pack (1)
Before electric energy supplement, whether the voltage for first detecting the second battery pack is higher than threshold value, if so, then enabling the second battery pack to the first battery
Packet electric energy supplement；If not, being charged with external power supply to the second battery pack, the voltage to the second battery pack is higher than threshold value Shi Zailing
Second battery pack is to the first battery pack electric energy supplement.
12. control method as claimed in claim 11, which comprises the following steps:
Step 1. is closed first manual switch QF1 and the second manual switch QF2, and the first battery pack (1) connection compensator simultaneously passes through
Compensator is powered to touch display screen (5)；
Step 2. judge compensator (3) and touch display screen whether it is electric, such as it is electric, then go to step 6；
Step 3. is closed third manual switch QF3；
Step 4. compensator, touch display screen and battery manager (4) obtain electric；
Step 5. battery manager controls first switch K1 closure；
Whether the voltage of step 6. battery manager detection the second battery pack (2) is greater than threshold value, if so, then going to step 8；
Step 7. battery manager is closed second switch K2, disconnects third switch K3, and external power supply charges to the second battery pack, turns
Step 6；
Whether the voltage that step 8. battery manager detects the first battery pack is greater than over-discharge threshold value, if so, then going to step 10；
Second battery pack of step 9. passes sequentially through the equalizing circuit inside compensator and battery manager and supplements to the first battery pack
Electric energy goes to step 8；
Step 10. is closed second switch K2 and third switch K3, disconnects first switch K1, and starting terminates.
13. control method as claimed in claim 12, which is characterized in that after the starting, detect the second battery pack (2)
Electricity, when the electricity of the second battery pack be lower than power threshold when, control compensator (3) to the second battery pack charge, make its electricity
Amount reaches setting value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910055341.1A CN109638926B (en) | 2019-01-21 | 2019-01-21 | Compensation circuit for energy storage system, energy storage system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910055341.1A CN109638926B (en) | 2019-01-21 | 2019-01-21 | Compensation circuit for energy storage system, energy storage system and control method |
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| CN109638926A true CN109638926A (en) | 2019-04-16 |
| CN109638926B CN109638926B (en) | 2024-08-06 |
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Cited By (1)
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| CN112564228A (en) * | 2020-12-11 | 2021-03-26 | 清远道动新材料科技有限公司 | UPS power supply |
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| WO2018049817A1 (en) * | 2016-09-13 | 2018-03-22 | 沃太能源南通有限公司 | Energy-storage lithium battery pack, and capacity expansion method for same |
| CN206426869U (en) * | 2017-01-19 | 2017-08-22 | 东莞市青鑫新能源有限公司 | A kind of moveable charging system for electric automobile |
| CN108248419A (en) * | 2017-12-18 | 2018-07-06 | 蔚来汽车有限公司 | Energy-storage battery charge-discharge system and method and relevant device |
| CN207859973U (en) * | 2017-12-18 | 2018-09-14 | 蔚来汽车有限公司 | Energy-storage battery charge-discharge system |
| CN209233536U (en) * | 2019-01-21 | 2019-08-09 | 珠海格力电器股份有限公司 | Compensation circuit for energy storage system and energy storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564228A (en) * | 2020-12-11 | 2021-03-26 | 清远道动新材料科技有限公司 | UPS power supply |
| CN112564228B (en) * | 2020-12-11 | 2024-02-13 | 清远道童新能源有限公司 | UPS power supply |
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