CN109167111A - The LiFePO4 standby battery group charging method for inhibiting circulation to generate - Google Patents
The LiFePO4 standby battery group charging method for inhibiting circulation to generate Download PDFInfo
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- CN109167111A CN109167111A CN201810761727.XA CN201810761727A CN109167111A CN 109167111 A CN109167111 A CN 109167111A CN 201810761727 A CN201810761727 A CN 201810761727A CN 109167111 A CN109167111 A CN 109167111A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910052493 LiFePO4 Inorganic materials 0.000 title claims abstract description 16
- 230000002401 inhibitory effect Effects 0.000 title claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 45
- 239000000178 monomer Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 abstract description 5
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H02J7/027—
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of LiFePO4 standby battery group charging methods that inhibition circulation generates, and solve the problems, such as that several single battery battery core series unit parallel connections are followed by being easy to produce circulation in intermittent charging on DC bus.The present invention uses intermittent charging modes, avoids long-term floating charging to battery accidental damage, and battery is long, and the method filled in intermittent charge using wheel is avoided between two parallel branches and circulation occurs；Multiple groups battery parallel redundancy, mutual backup, high reliablity；Whole group battery is in series by the battery cell of single core strueture, crosses flow problem caused by unbalanced between elimination single battery battery core；The parallel extended convenience of multiple groups battery, retrofit work amount are small.Big group of lithium iron phosphate storage battery of multiple groups parallel connection of the present invention is the method for operation using single group wheel current charge, multiple groups while electric discharge, avoids two or more sets batteries while charging and the phenomenon that circulation occur.
Description
Technical field
The present invention relates to a kind of charging methods of the standby battery group of the DC power system of substation (power plant), special
It is not related to a kind of charging method of the lithium iron phosphate storage battery group backup power source of the DC power system of substation (power plant).
Background technique
The equipment such as protection equipment, communication equipment, circuit-breaker switching on-off operation and the emergency lighting of substation (power plant),
It is that uninterruptible power supply is provided by DC power system, uninterrupted DC power supply is to guarantee substation's (power plant) various kinds of equipment peace
Entirely, the critical facility of stable operation；The stability of Operation of Electric Systems and the reliability of relay protection largely take
Certainly in the stabilization of DC power system and reliably.The DC power system of existing substation is using lead-acid accumulator mostly
Group, but lead-acid accumulator is to the more demanding of running environment, security performance is poor, service life is compared with short, maintenance work amoun is big, shape
State monitoring is difficult, is unfavorable for the stable operation and lean control management of electric system.The security performance of lithium iron phosphate storage battery
It is higher, high-temperature behavior is good, energy density is high, has extended cycle life, is nontoxic, is pollution-free, is cheap, is easy to maintain, be substitution lead
The preferable selection of acid accumulator.Currently, DC power system is rare to use lithium iron phosphate storage battery in substation (power plant)
Group, it is that minority uses the specific technical proposal is: several LiFePO4 single battery battery cores are composed in series single battery electricity
Core series unit, then, then by several single battery battery cores series units it is in parallel after, component units battery group, finally, again
Several element cell groups are connected, big group of entire battery is constituted, is directly mounted on DC bus for big group of the battery
On, the method for operation that big group of the battery is continuous online floating charge mode, that is, each LiFePO4 monomer in big group of battery
Battery is constantly in boost charge state, and this connection structure and the method for operation have the disadvantage in that 1, are continuous online
Floating charge mode, the lithium ion that will cause in single battery anode are deposited in negative terminal surface, cause it to lose its activity, lithium ion is lasting
Deposition will lead to the decline of battery capacity, so as to shorten the service life of ferric phosphate lithium cell；If 2, certain in big group of battery
One element cell group breaks down, then will be disconnected for big group of battery with being electrically connected for DC bus, make DC bus
Lose backup power source；3, when substation (power plant) plant retrofit can only use when big group of existing battery is not able to satisfy capacity
Another big group of battery of mode in parallel carries out dilatation, and this parallel way, will lead to and generates ring between big group of two batteries
Stream, this does not allow, according to existing regulatory requirements, electric power storage that can only be bigger at capacity by big group of integral replacing of existing battery
Investment increase and the wasting of resources are caused in big group of pond.
In existing communication technique field, have using following technical scheme: by several LiFePO4 single battery battery cores
Series connection, compositing monomer battery battery core series unit, then several single battery battery core series unit parallel connections are followed by direct current mother
On line, several single battery battery core series units in parallel constitute big group of entire battery；In each single battery electricity
On core series unit, series connection accesses the charging unit for having a tapping mode, which is by check diode and one
It is constituted after a charge switch is in parallel.When DC bus is in normal operating conditions, big group of entire battery is in spare
State, at this point, the charge switch of check diode and open circuit, single battery battery core series unit and DC bus are blocked, it is whole
Big group of a battery is in static condition；Since battery has self discharge effect, under static condition, entire battery
The voltage organized greatly can constantly decline, and after voltage reduces certain amplitude, it is spare that control system, which can control charger and enter,
The mode of power source charges；The prior art be by be closed on each single battery battery core series unit connect access between
It has a rest the charge switch controlled in charging unit, to realize to the big group of charging of entire battery；The above this charging modes are general
Referred to as intermittent charging modes；But this intermittent charging modes have following drawback: in charging mode, entire battery is big
Blocking between group and DC bus is released from, and each single battery battery core series unit is linked on DC bus simultaneously,
When each cell capacity is different or consistency is poor, it is easy to produce the feelings of accumulator super-charge or charge less during the charging process
Condition, long-time service will lead to battery accelerated ageing, and the service life substantially reduces.Therefore, this mode connects to single battery battery core
The coherence request of unit is higher, and it is same not to be suitable for capacity difference, the series unit that the time limit is different, accumulator status is different that puts into operation
When it is used in parallel, when needing replacing old battery or enlarging, generally require big group of carry out integral replacing of entire battery, warp
Ji property is bad, easily causes the wasting of resources.
Summary of the invention
The present invention provides a kind of LiFePO4 standby battery group charging methods that inhibition circulation generates, and solve several
A single battery battery core series unit parallel connection is followed by the technical issues of being easy to produce circulation in intermittent charging on DC bus.
The present invention is to solve the above technical problem by the following technical programs:
A kind of LiFePO4 standby battery group charging method for inhibiting circulation to generate, including DC bus, ac bus and straight
Galvanic electricity source centralized management system, ac bus is linked together by rectification and charging unit with DC bus, in DC bus
On be connected with DC bus-bar voltage table, DC power supply centralized management system respectively with rectification and charging unit and DC bus-bar voltage
Table is electrically connected；It is characterized in that following steps:
The first step connects several LiFePO4 single battery battery cores, forms first single battery battery core series unit, will be inverse
The first tapping mode charging unit is constituted after only diode is in parallel with a charge switch, is equipped with the series connection of first single battery battery core
Entity management system；First single battery battery core series unit is connected to by the first tapping mode charging unit with DC bus
Together, the first battery series unit voltmeter is connected at the both ends of first single battery battery core series unit, in DC bus
It connects on the connecting line of the first tapping mode charging unit the first battery series unit ammeter, by first single battery electricity
Core series unit management system respectively with first single battery battery core series unit, the first battery series unit voltmeter,
One tapping mode charging unit and the first battery series unit ammeter are electrically connected, by first single battery battery core string
Connection entity management system is electrically connected with DC power supply centralized management system；
Second step connects several LiFePO4 single battery battery cores, forms second comonomer battery battery core series unit, will be another
The second tapping mode charging unit is constituted after an outer check diode is in parallel with another charge switch, is equipped with second comonomer
Battery battery core series unit management system；Second comonomer battery battery core series unit is by the second tapping mode charging unit and directly
Stream bus links together, and connects the second battery series unit voltage at the both ends of second comonomer battery battery core series unit
Table, the second battery series unit ammeter of connecting on DC bus and the connecting line of the second tapping mode charging unit will
Second comonomer battery battery core series unit management system is connected with second comonomer battery battery core series unit, the second battery respectively
Cell voltage table, the second tapping mode charging unit and the second battery series unit ammeter are electrically connected, by second
Single battery battery core series unit management system is electrically connected with DC power supply centralized management system；Above step is repeated,
It constructs and connects other monomers battery battery core series unit；
Third step, when big group of battery voltage reduce certain amplitude after, DC power supply centralized management system control rectification and fill
The intermittent charge mode that electric installation enters as backup power source charging；
4th step, DC power supply centralized management system control the charge switch of the open circuit in the first tapping mode charging unit first
Closure, while the charge switch of open circuit in other tapping mode charging units is controlled still in open-circuit condition, at this moment, direct current
Source centralized management system control rectification and charging unit fill first single battery battery core series unit by DC bus
Electricity；
5th step, after first single battery battery core series unit charging complete, DC power supply centralized management system control first
The charge switch of open circuit in tapping mode charging unit is opened, meanwhile, the second interval of DC power supply centralized management system control
The charge switch closure of the open circuit in charging unit is controlled, DC power supply centralized management system control rectification and charging unit pass through
DC bus charges to second comonomer battery battery core series unit；
6th step, after second comonomer battery battery core series unit charging complete, DC power supply centralized management system control second
The charge switch of open circuit in tapping mode charging unit is opened, meanwhile, control opening in next tapping mode charging unit
The charge switch on road is closed；So it is sequentially completed other monomers battery battery core series unit in parallel on DC bus in turn
Charging.
The present invention uses intermittent charging modes, avoids long-term floating charging to battery accidental damage, battery
Method that is long, being filled in intermittent charge using wheel avoids multiple groups different capabilities, difference puts into operation the time limit, different batteries state
Parallel branch charge simultaneously the accumulator super-charge or charge less problem of generation, be convenient for single parallel branch battery altering or dilatation；
Multiple groups battery parallel redundancy, mutual backup, high reliablity；Whole group battery is in series by the battery cell of single core strueture, disappears
Unbalanced caused flow problem excessively between demonomerization battery battery core；The parallel extended convenience of multiple groups battery, retrofit work amount are small.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the charging and discharging curve of single battery battery core series unit of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing:
A kind of LiFePO4 standby battery group charging method for inhibiting circulation to generate, including DC bus 1,2 and of ac bus
DC power supply centralized management system 5, ac bus 2 is linked together by rectification and charging unit 6 with DC bus 1, straight
DC bus-bar voltage table 8 is connected on stream bus 1, and DC power supply centralized management system 5 is respectively with rectification and charging unit 6 and directly
Stream busbar voltage table 8 is electrically connected；It is characterized in that following steps:
The first step connects several LiFePO4 single battery battery cores, forms first single battery battery core series unit 3, will
The first tapping mode charging unit 7 is constituted after check diode is in parallel with a charge switch, is equipped with first single battery battery core
Series unit management system 4；First single battery battery core series unit 3 is female by the first tapping mode charging unit 7 and direct current
Line 1 links together, and connects the first battery series unit voltmeter 9 at the both ends of first single battery battery core series unit 3,
It connects on DC bus 1 and the connecting line of the first tapping mode charging unit 7 first battery series unit ammeter 10, it will
First single battery battery core series unit management system 4 respectively with first single battery battery core series unit 3, the first battery string
Receipts or other documents in duplicate member voltmeter 9, the first tapping mode charging unit 7 and the first battery series unit ammeter 10 are electrically connected,
First single battery battery core series unit management system 4 is electrically connected with DC power supply centralized management system 5；
Second step connects several LiFePO4 single battery battery cores, forms second comonomer battery battery core series unit, will be another
The second tapping mode charging unit is constituted after an outer check diode is in parallel with another charge switch, is equipped with second comonomer
Battery battery core series unit management system；Second comonomer battery battery core series unit is by the second tapping mode charging unit and directly
Stream bus 1 links together, and connects the second battery series unit voltage at the both ends of second comonomer battery battery core series unit
Table, the second battery series unit ammeter of connecting on DC bus 1 and the connecting line of the second tapping mode charging unit will
Second comonomer battery battery core series unit management system is connected with second comonomer battery battery core series unit, the second battery respectively
Cell voltage table, the second tapping mode charging unit and the second battery series unit ammeter are electrically connected, by second
Single battery battery core series unit management system is electrically connected with DC power supply centralized management system 5；Above step is repeated,
It constructs and connects other monomers battery battery core series unit；
Third step, when big group of battery voltage reduce certain amplitude after, DC power supply centralized management system 5 control rectification and fill
The intermittent charge mode that electric installation 6 enters as backup power source charging；
The charging that 4th step, DC power supply centralized management system 5 control the open circuit in the first tapping mode charging unit 7 first is opened
It closes and closes, while controlling the charge switch of open circuit in other tapping mode charging units still in open-circuit condition, at this moment, direct current
The control of power supply centralized management system 5 rectification and charging unit 6 pass through DC bus 1 to first single battery battery core series unit 3
It charges；
5th step, after first single battery battery core 3 charging complete of series unit, the control of DC power supply centralized management system 5 the
The charge switch of open circuit in one tapping mode charging unit 7 is opened, meanwhile, the control of DC power supply centralized management system 5 second
The charge switch of open circuit in tapping mode charging unit is closed, the control of DC power supply centralized management system 5 rectification and charging dress
6 are set to charge to second comonomer battery battery core series unit by DC bus 1；
6th step, after second comonomer battery battery core series unit charging complete, DC power supply centralized management system 5 control second
The charge switch of open circuit in tapping mode charging unit 7 is opened, meanwhile, control opening in next tapping mode charging unit
The charge switch on road is closed；So it is sequentially completed the wheel of other monomers battery battery core series unit in parallel on DC bus 1
Current charge.
Big group of lithium iron phosphate storage battery of multiple groups parallel connection of the present invention is using single group wheel current charge, multiple groups while to discharge
The method of operation avoids multiple groups different capabilities, different the put into operation time limit, the parallel branch of different batteries state while generations of charging
Accumulator super-charge or charge less problem.DC power supply centralized management system 5 determines that battery is according to accumulator voltage size
It is no to need to charge, when a group storage battery needs to charge, from the single battery battery core series unit management system of the group to direct current
Power supply centralized management system 5 sends request charging signals, and DC power supply centralized management system 5 charges to corresponding tapping mode and fills
Set and assign charging path opening signal, and assign voltage and current regulating command to charging unit, tapping mode charging unit according to
Instruction unpack charging path, charging unit change output voltage and electric current according to voltage instruction, realize and charge to battery.When more
When a single battery battery core series unit issues request charging signals to DC power supply centralized management system 5 simultaneously, DC power supply
Centralized management system 5 determines the charging order of single battery battery core series unit according to request signal sequencing, rear to signal
Single battery battery core series unit should wait in line to charge.
The charge and discharge process of battery mainly includes following several stages:
A) constant current-pressure limiting charging stage (T1): charging unit charging current is kept constant in this stage, and voltage is stepped up, when
DC power supply centralized management system 5 detects single battery battery core series unit ceiling voltage or single battery battery core series unit
End voltage be greater than or equal to defined voltage value after, be transmitted into next charging stage to DC power supply centralized management system 5
Signal, the charging of this stage terminate；
B) constant pressure-current-limiting charge stage (T2): DC power supply centralized management system 5 issues voltage electricity to charging unit in this stage
Adjustment signal is flowed, keeps charging unit output voltage constant, charging current reduces automatically, and maximum charging current, which is limited in, to be allowed to fill
Within electric current, when DC power supply centralized management system 5 detects that maximum battery voltage is greater than setting value, charging current drops to
After specified value or after constant voltage time to specified value, it is transmitted into next stage signal to DC power supply centralized management system 5, this rank
Section charging terminates；
C) single battery battery core series unit open circuit standing stage (T3): single battery battery core series unit completes entire T1 and T2
After charging process, DC power supply centralized management system 5 sends charge closing path signal to tapping mode charging unit, and interval is controlled
Charging unit processed enters open circuit static condition according to instruction charge closing access, single battery battery core series unit；
D) intermittent benefit charging stage (T4): the charge circuit of single battery battery core series unit is in open circuit static condition, when
DC power supply centralized management system 5 detects that accumulator capacity is reduced to the 95% of battery pack charging limitation voltage stage capacity
When SOC, single battery open circuit voltage reach setting number of days lower than setting value or time of repose, by DC power supply centralized management system
5 re-initiate charge request, and single battery battery core series unit reenters constant current-pressure limiting charging stage；
E) battery power discharge process (T5): DC power supply centralized management system 5 can monitor DC bus-bar voltage at any time, if alternating current
Have a power failure, DC power supply centralized management system 5 can provide energy according to loading condition and be controlled by DC power supply centralized management system 5
Big group of battery no-delay into discharge condition.
Claims (1)
1. a kind of LiFePO4 standby battery group charging method for inhibiting circulation to generate, including DC bus (1), ac bus
(2) connected with DC power supply centralized management system (5), ac bus (2) by rectification and charging unit (6) and DC bus (1)
Be connected together, be connected on DC bus (1) DC bus-bar voltage table (8), DC power supply centralized management system (5) respectively with
Rectification and charging unit (6) and DC bus-bar voltage table (8) are electrically connected；It is characterized in that following steps:
The first step connects several LiFePO4 single battery battery cores, forms first single battery battery core series unit (3),
By check diode it is in parallel with a charge switch after constitute the first tapping mode charging unit (7), be equipped with first single battery
Battery core series unit management system (4)；First single battery battery core series unit (3) passes through the first tapping mode charging unit
(7) it links together with DC bus (1), connects the first battery at the both ends of first single battery battery core series unit (3)
Series unit voltmeter (9), the first storage of connecting on DC bus (1) and the connecting line of the first tapping mode charging unit (7)
Battery Series Sheet elementary current table (10), first single battery battery core series unit management system (4) is electric with the first monomer respectively
Pond battery core series unit (3), the first battery series unit voltmeter (9), the first tapping mode charging unit (7) and first store
Battery Series Sheet elementary current table (10) is electrically connected, by first single battery battery core series unit management system (4) and directly
Galvanic electricity source centralized management system (5) is electrically connected；
Second step connects several LiFePO4 single battery battery cores, forms second comonomer battery battery core series unit, will be another
The second tapping mode charging unit is constituted after an outer check diode is in parallel with another charge switch, is equipped with second comonomer
Battery battery core series unit management system；Second comonomer battery battery core series unit is by the second tapping mode charging unit and directly
Stream bus (1) links together, in the both ends of second comonomer battery battery core series unit connection the second battery series unit electricity
Press table, the second battery series unit electric current of connecting on DC bus (1) and the connecting line of the second tapping mode charging unit
Table, by second comonomer battery battery core series unit management system respectively with second comonomer battery battery core series unit, the second electric power storage
Pond series unit voltmeter, the second tapping mode charging unit and the second battery series unit ammeter are electrically connected,
Second comonomer battery battery core series unit management system and DC power supply centralized management system (5) are electrically connected；It repeats
Above step constructs and connects other monomers battery battery core series unit；
Third step, when big group of battery voltage reduce certain amplitude after, DC power supply centralized management system (5) control rectification and
The intermittent charge mode that charging unit (6) enters as backup power source charging；
4th step, DC power supply centralized management system (5) control filling for the open circuit in the first tapping mode charging unit (7) first
Electric switch closure, while controlling the charge switch of open circuit in other tapping mode charging units still in open-circuit condition, at this moment,
DC power supply centralized management system (5) control rectification and charging unit (6) pass through DC bus (1) to first single battery battery core
Series unit (3) charges；
5th step, after first single battery battery core series unit (3) charging complete, DC power supply centralized management system (5) control
The charge switch for making the open circuit in the first tapping mode charging unit (7) is opened, meanwhile, DC power supply centralized management system (5)
The charge switch closure of the open circuit in the second tapping mode charging unit is controlled, DC power supply centralized management system (5) control is whole
Stream and charging unit (6) charge to second comonomer battery battery core series unit by DC bus (1)；
6th step, after second comonomer battery battery core series unit charging complete, DC power supply centralized management system (5) control the
The charge switch of open circuit in two tapping mode charging units (7) is opened, meanwhile, it controls in next tapping mode charging unit
Open circuit charge switch closure；So it is sequentially completed other monomers battery battery core Series Sheet in parallel on DC bus (1)
The wheel current charge of member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810761727.XA CN109167111A (en) | 2018-07-12 | 2018-07-12 | The LiFePO4 standby battery group charging method for inhibiting circulation to generate |
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| CN201810761727.XA CN109167111A (en) | 2018-07-12 | 2018-07-12 | The LiFePO4 standby battery group charging method for inhibiting circulation to generate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021104459A1 (en) * | 2019-11-30 | 2021-06-03 | 华为技术有限公司 | Standby power supply and control method therefor |
| CN114513036A (en) * | 2022-04-19 | 2022-05-17 | 深圳市德兰明海科技有限公司 | Portable energy storage power supply parallel packaging system and method |
| CN114513036B (en) * | 2022-04-19 | 2022-07-19 | 深圳市德兰明海科技有限公司 | Portable energy storage power supply parallel packaging system and method |
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Application publication date: 20190108 |