CN113300009A - Battery cluster and energy storage system - Google Patents
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- CN113300009A CN113300009A CN202110557413.XA CN202110557413A CN113300009A CN 113300009 A CN113300009 A CN 113300009A CN 202110557413 A CN202110557413 A CN 202110557413A CN 113300009 A CN113300009 A CN 113300009A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 230000001012 protector Effects 0.000 claims description 69
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 3
- 239000002360 explosive Substances 0.000 claims description 3
- 229910001416 lithium ion Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
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- 238000011144 upstream manufacturing Methods 0.000 description 2
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- 102100021298 b(0,+)-type amino acid transporter 1 Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/20—Systems characterised by their energy storage means
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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
- 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
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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
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention provides a battery cluster and an energy storage system, which are applied to the technical field of energy storage. Compared with the prior art, the battery cluster provided by the invention has the advantages that the corresponding short-circuit protection range is larger, and the safe operation of the battery cluster and an energy storage system is favorably ensured.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a battery cluster and an energy storage system.
Background
In the prior art, a battery cluster at least includes a plurality of battery modules, each battery module is connected in series and then connected to a switch box, and is connected to a battery collecting cabinet at a rear stage via the switch box, and the connection relationships among the battery modules in the battery and between the battery modules and the switch can be seen in fig. 1. In order to prevent the other battery clusters in the energy storage system and even the safe operation of the whole energy storage system from being influenced when any battery cluster is in fault, a fuse is arranged in the switch box, and when the downstream of the switch box, namely the position shown by the short circuit 1 in figure 1, is in short circuit, the connection between the fault battery cluster and the energy storage system can be cut off through the action of the fuse in the switch box, so that the further expansion of the fault is prevented.
However, the inventor researches and discovers that when a short-circuit fault occurs in a battery cluster as shown by a short circuit 2 in fig. 1, because a fuse is not contained in a short-circuit loop, the fuse in a switch box often cannot act in time, so that the battery cluster is difficult to be effectively protected, and even the safe operation of the whole energy storage system is influenced.
Disclosure of Invention
The invention provides a battery cluster and an energy storage system, wherein an overcurrent protector is arranged in the battery cluster, so that on the premise of protecting the downstream short-circuit fault of a switch box, partial short-circuit faults in the battery cluster can be protected, the protection range is expanded, and the safe operation of the battery cluster and the energy storage system is favorably ensured.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a battery cluster comprising: a plurality of battery modules and at least one overcurrent protector, wherein,
the battery modules are connected in series to form a series branch;
two ends of the series branch are connected with the switch box;
each overcurrent protector is connected in series with any position of the series branch.
Optionally, the number of the overcurrent protectors is smaller than that of the battery modules, and any overcurrent protector is connected between two battery modules.
Optionally, the number of the over-current protectors is N, and N is greater than or equal to 2;
dividing the serial branch into N +1 serial sub-branches;
any overcurrent protector is connected in series between the two series sub-branches.
Optionally, if the number of the battery modules is an integer multiple of N +1, the same number of battery modules are included in each series sub-branch.
Optionally, if the number of the battery modules is not an integral multiple of N +1, the N +1 paths of serial sub-branches include N paths of first serial sub-branches and 1 path of second serial sub-branches;
each first series sub-branch comprises the same number of battery modules, and the number of the battery modules in the first series sub-branch is different from the number of the battery modules in the second series sub-branch by one.
Optionally, the number of the overcurrent protectors is equal to the number of the battery modules, and each overcurrent protector is connected with each battery module in series in a crossing manner.
Optionally, the overcurrent protector comprises at least one of a fuse and a circuit breaker.
Optionally, the fuse includes at least one of a passive fuse and an explosive fuse.
Optionally, the battery module includes one of a lithium ion battery module, a solid-state battery module, a flow battery module, and a photovoltaic panel.
In a second aspect, the present invention provides an energy storage system comprising: a battery combiner box BCP, an energy storage inverter PCS and at least one battery cluster according to any of the first aspect of the invention,
each battery cluster is connected with one end of the BCP respectively;
the other end of the BCP is connected with a power grid through the PCS.
Optionally, in a case that the battery cluster does not include a switch box, the energy storage system further includes a switch box, wherein,
the switch box is connected in series between the battery cluster and the BCP.
The battery cluster comprises a plurality of battery modules and at least one over-current protector, wherein the battery modules are connected in series to form a series branch, the over-current protectors are connected in series at any position of the series branch, and furthermore, two ends of the obtained series branch are connected with a switch box. The battery cluster provided by the invention has the advantages that the overcurrent protector is arranged in the battery cluster, so that the overcurrent protector is positioned at the upstream of the switch box, if the short-circuit point is positioned at the downstream of the switch box, the battery cluster provided by the invention can also be protected, if the short-circuit point is positioned at the upstream of the switch box and in the battery cluster, the overcurrent protector can also realize the protection function as long as the short-circuit loop comprises the overcurrent protector.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art battery cluster configuration;
fig. 2 is a schematic structural diagram of a battery cluster provided in an embodiment of the present invention;
FIG. 3 is a schematic diagram of another battery cluster according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another battery cluster provided in an embodiment of the present invention;
fig. 5a is a schematic diagram of a protection range of a battery cluster according to an embodiment of the present invention;
FIG. 5b is a schematic diagram of the protection range of another battery cluster provided by the embodiment of the invention;
FIG. 5c is a schematic diagram of a protection range of another battery cluster according to an embodiment of the present invention;
FIG. 5d is a schematic diagram of the protection range of another battery cluster according to the embodiment of the present invention;
fig. 5e is a schematic diagram of the protection range of another battery cluster provided by the embodiment of the invention;
FIG. 6 is a schematic diagram of an unprotected area of a battery cluster provided by an embodiment of the invention;
fig. 7 is a schematic structural diagram of another battery cluster provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an energy storage system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a battery cluster according to an embodiment of the present invention, where the battery cluster includes a plurality of battery modules (shown by BAT1 to BATn in fig. 2) and at least one overcurrent protector (shown by Fuse1 in the figure). It should be noted that in the embodiment shown in fig. 2, the case of one overcurrent protector is shown, and the case of including more than one overcurrent protector will be explained in the following embodiments.
As shown in fig. 2, the respective battery modules in the battery cluster are connected in series to form a series branch, and both ends (shown as A, B in the drawing) of the resulting series branch are connected to the switch box.
Each overcurrent protector is connected in series at any position of the series branch. Under the condition that the number of the overcurrent protectors is smaller than the number of the battery modules, each overcurrent protector Fuse1 is respectively connected in series inside the series branch, that is, both ends of each overcurrent protector are connected with the battery modules, which can be seen in fig. 2.
In summary, in the battery cluster provided in the embodiment of the present invention, after the switch boxes are connected, if a short circuit occurs at the rear stage of the switch box, that is, a short circuit condition shown by the short circuit 2 in fig. 2 occurs, the short circuit loop includes the overcurrent protector Fuse1, and short circuit protection can be implemented by the overcurrent protector; correspondingly, if a short circuit occurs in the front stage of the switch box and inside the battery cluster, namely, in the case of a local short circuit shown by the short circuit 2 in fig. 2, as long as the short circuit loop includes the overcurrent protector Fuse1, short circuit protection can be realized through the overcurrent protector, and further expansion of the fault is effectively prevented. Therefore, compared with the prior art, the battery cluster provided by the invention has a larger short-circuit protection range, and is beneficial to ensuring the safe operation of the battery cluster and an energy storage system.
Further, on the basis that the protection range is larger, the overcurrent protectors in the switch boxes connected with the battery clusters provided by the embodiment can be eliminated, and then the quantity of the overcurrent protectors is reasonably set, so that the overall cost of the battery clusters and the overall cost of the energy storage system can be kept unchanged.
Furthermore, when the arc flash energy is evaluated, the arc flash energy is in direct proportion to the amplitude and the duration of the short-circuit current, so that the duration and the amplitude of the short-circuit current can be greatly reduced and the evaluation value of the arc flash energy is reduced under the condition that an overcurrent protector is arranged in the battery cluster.
Optionally, under the condition that only one overcurrent protector is arranged in the battery cluster, the overcurrent protector can be further arranged at the position shown in fig. 3, that is, the overcurrent protector is arranged at the outer side of the serial branch, and under such a condition, besides the short-circuit condition shown by the short circuit 1, the short-circuit condition shown by the short circuit 2 in fig. 3 can be protected. Of course, the overcurrent protector can also be arranged on the negative side of the series branch, which is not shown in detail here.
As shown in fig. 1, in the existing application, two overcurrent protectors are mostly disposed in a switch box, and based on the core idea of the present invention, an embodiment of the present invention provides a battery cluster capable of obtaining a better short-circuit protection effect without increasing the cost of the battery cluster. Specifically, referring to fig. 4, fig. 4 is a schematic structural diagram of another battery cluster provided in the embodiment of the present invention, and the battery cluster provided in the embodiment includes two overcurrent protectors, of course, it can also be understood that the overcurrent protector originally disposed inside the switch box is disposed in the series branch of the battery cluster, and the specific disposition position of the overcurrent protector will be expanded in the following content, which will not be described in detail here.
In the case of two overcurrent protectors provided in the battery, at least the protection of the short circuit condition shown in fig. 5a to 5e (including the short circuit condition of the rear stage of the switch box) can be realized (of course, all the short circuit conditions are not completely shown in the embodiment shown in fig. 5a to 5 e), and in practical application, as long as the overcurrent protectors are included in the short circuit loop, the short circuit protection can be realized, which is not listed.
As is apparent from fig. 5a to 5e, compared with the prior art, the battery cluster provided by the present invention can achieve protection against short-circuit faults in more cases, has a wider protection range, and does not increase the hardware cost of the battery cluster and the overall energy storage system.
It should be noted that, to the condition that includes two and more overcurrent protector in the battery cluster, overcurrent protector's the position of setting has multiple selection, considers should unify overcurrent protector's the lectotype as far as possible, avoids setting up the overcurrent protector of different specifications in the battery cluster, should make the quantity of the battery module that each overcurrent protector corresponds each other as far as possible when setting up overcurrent protector and be close to, divide each battery module equally as far as possible promptly.
It can be understood that if N overcurrent protectors are included, the battery modules in the battery cluster can be correspondingly divided into N +1 groups, and based on this, if the number of the battery modules is an integral multiple of N +1, the battery modules in the battery cluster can be equally divided into N +1 series sub-branches, so that the same number of battery modules are included in each series sub-branch.
Correspondingly, if the number of the battery modules is not an integral multiple of N +1, the number of the battery modules included in each series sub-branch cannot be guaranteed to be equal, in this case, when the series sub-branches are divided, the difference in the number of the battery modules between each series sub-branch is reduced as much as possible, and in the N +1 divided series sub-branches, N first series sub-branches and 1 second series sub-branches are included, wherein each first series sub-branch includes the same number of the battery modules, and more importantly, the number of the battery modules in any first series sub-branch is different from the number of the battery modules in any second series sub-branch by one. In practical applications, the number of the battery modules and the number of the overcurrent protectors included in the battery cluster can be handled according to the above dividing principle, and details are not described herein.
Of course, the setting position of the over-current protector can be flexibly adjusted according to the requirements, and the over-current protector also belongs to the protection scope of the invention on the premise of not exceeding the core idea of the invention.
It is conceivable that the battery cluster provided by any of the above embodiments of the present invention may not only expand the protection range, but also divide the battery cluster into multiple segments after a short-circuit fault occurs, so as to reduce the residual voltage of each segment, which is helpful to improve the safety of operation and maintenance.
In practical applications, there are many positions where short circuits may occur in a battery cluster, and particularly, in the case where the number of overcurrent protectors is smaller than the number of battery modules, it is difficult to protect all short circuits. Taking the example of the battery cluster provided by the embodiment shown in fig. 4 as an example, there is no way to provide protection when a short circuit fault occurs in the location shown in fig. 6. Based on this, as a situation of setting the overcurrent protectors to the utmost, the corresponding technical scheme of the embodiment shown in fig. 7 can be adopted, that is, the overcurrent protectors with the same number as the battery modules are set, and the overcurrent protectors and the battery modules are connected in series in a cross manner, so that the omnibearing short-circuit protection is provided for the battery cluster.
It is conceivable that, with the technical solution shown in fig. 7, although the protection range can be covered in all directions, compared with the prior art, the number of overcurrent protectors is increased greatly, and the cost of the battery cluster is inevitably increased greatly, and meanwhile, because the overcurrent protectors inevitably have a certain internal resistance, the number of overcurrent protectors is excessive, and the efficiency of the battery cluster is also affected. Therefore, in practical application, the protection range and the hardware cost should be balanced, and the number of the overcurrent protectors is reasonably set.
Optionally, in any of the above embodiments, the overcurrent protector includes at least one of a fuse and a circuit breaker. Specifically, the fuse includes at least one of a passive fuse and an explosive fuse. In practical application, the specific implementation of the over-current protector can be reasonably selected by combining practical conditions.
Further, the battery module described in any of the above embodiments includes one of a lithium ion battery module, a solid-state battery module, a flow battery module, and a photovoltaic panel.
Optionally, referring to fig. 8, fig. 8 is a schematic structural diagram of an energy storage system provided in an embodiment of the present invention, where the energy storage system provided in this embodiment includes: a battery bus bar BCP, an energy storage inverter PCS, and at least one battery cluster as provided in any of the above embodiments, wherein,
each battery cluster is connected with one end of the BCP respectively;
the other end of the BCP is connected with the power grid through the PCS.
Optionally, in the case that the battery cluster includes a switch box, the switch box in the battery cluster is connected to the BCP;
in the case that the battery cluster does not include a switch box, the energy storage system further includes a switch box, and the switch box is connected in series between the battery cluster and the BCP.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A battery cluster, comprising: a plurality of battery modules and at least one overcurrent protector, wherein,
the battery modules are connected in series to form a series branch;
two ends of the series branch are connected with the switch box;
each overcurrent protector is connected in series with any position of the series branch.
2. The battery cluster according to claim 1, wherein the number of the overcurrent protectors is smaller than the number of the battery modules, and any overcurrent protector is connected between two of the battery modules.
3. The battery cluster according to claim 2, wherein the number of the over-current protectors is N, and N is more than or equal to 2;
dividing the serial branch into N +1 serial sub-branches;
any overcurrent protector is connected in series between the two series sub-branches.
4. The battery cluster according to claim 3, wherein if the number of the battery modules is an integer multiple of N +1, the same number of battery modules is included in each series sub-branch.
5. The battery cluster according to claim 3, wherein if the number of the battery modules is not an integer multiple of N +1, the N +1 serial sub-branches include N first serial sub-branches and 1 second serial sub-branch;
each first series sub-branch comprises the same number of battery modules, and the number of the battery modules in the first series sub-branch is different from the number of the battery modules in the second series sub-branch by one.
6. The battery cluster according to claim 1, wherein the number of the overcurrent protectors is equal to the number of the battery modules, and each overcurrent protector and each battery module are connected in cross-series.
7. The battery cluster of any of claims 1-6, wherein the over-current protector comprises at least one of a fuse and a circuit breaker.
8. The battery cluster of claim 7, wherein the fuse comprises at least one of a passive fuse and an explosive fuse.
9. The battery cluster of any of claims 1-6, wherein the battery modules comprise one of lithium ion battery modules, solid state battery modules, flow battery modules, and photovoltaic panels.
10. An energy storage system, comprising: a battery combiner cabinet BCP, an energy storage inverter PCS and at least one battery cluster according to any of claims 1-9,
each battery cluster is connected with one end of the BCP respectively;
the other end of the BCP is connected with a power grid through the PCS.
11. The energy storage system of claim 10, wherein, in the event that the battery cluster does not include a switch box, the energy storage system further comprises a switch box, wherein,
the switch box is connected in series between the battery cluster and the BCP.
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| CN202110557413.XA CN113300009A (en) | 2021-05-21 | 2021-05-21 | Battery cluster and energy storage system |
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| CN202110557413.XA CN113300009A (en) | 2021-05-21 | 2021-05-21 | Battery cluster and energy storage system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116581712A (en) * | 2023-07-07 | 2023-08-11 | 深圳市首航新能源股份有限公司 | Battery cluster and energy storage system thereof |
| CN116826931A (en) * | 2023-08-29 | 2023-09-29 | 成都特隆美储能技术有限公司 | Circuit connection method for improving efficiency of power loop of energy storage battery cluster |
| CN117741509A (en) * | 2024-02-20 | 2024-03-22 | 天津大学 | Energy storage power station fault detection method, device, equipment, medium and program product |
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| CN116581712A (en) * | 2023-07-07 | 2023-08-11 | 深圳市首航新能源股份有限公司 | Battery cluster and energy storage system thereof |
| CN116826931A (en) * | 2023-08-29 | 2023-09-29 | 成都特隆美储能技术有限公司 | Circuit connection method for improving efficiency of power loop of energy storage battery cluster |
| CN117741509A (en) * | 2024-02-20 | 2024-03-22 | 天津大学 | Energy storage power station fault detection method, device, equipment, medium and program product |
| CN117741509B (en) * | 2024-02-20 | 2024-05-24 | 天津大学 | Energy storage power station fault detection method, device, equipment, medium and program product |
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