CN109286046B - Battery energy storage system - Google Patents
Battery energy storage system Download PDFInfo
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- CN109286046B CN109286046B CN201811009736.XA CN201811009736A CN109286046B CN 109286046 B CN109286046 B CN 109286046B CN 201811009736 A CN201811009736 A CN 201811009736A CN 109286046 B CN109286046 B CN 109286046B
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of energy storage batteries, in particular to a battery energy storage system, which comprises: the battery rack comprises a battery rack module, a direct current bus positive bus bar, a direct current bus negative bus bar and a plurality of battery clusters. According to the battery energy storage system, on one hand, the power loop connection between the battery packs adopts the soft copper bars to replace the traditional power cables, so that the labor cost can be effectively reduced, the difference between the circuit length and the internal resistance of the battery cluster is reduced, the current equalization of the battery cluster is ensured, the electrical property consistency is good, the energy efficiency of the battery cluster is improved, and the service life of the battery cluster is prolonged; on the other hand, the direct current bus positive bus bar and the direct current bus negative bus bar are respectively arranged on two sides of the battery frame module at intervals, so that the total positive output end and the total negative output end of the battery cluster are prevented from being simultaneously led out, the wiring and the maintenance are convenient, and the safety distance between the positive electrode and the negative electrode is ensured, so that the risks of short circuit and electric leakage are effectively reduced.
Description
Technical Field
The invention relates to the technical field of energy storage batteries, in particular to a battery energy storage system.
Background
The energy storage system can realize the omnibearing monitoring and energy dispatching management of the working state of the energy storage power station; the battery pack is formed by connecting a plurality of battery cores in series and parallel; the battery cluster is a battery array formed by connecting battery packs in series and parallel. In energy storage system, the battery stack has contained multiseriate battery cluster, the electric energy passes through the electric wire netting and charges and discharges with energy storage inverter PCS to the battery, energy management system BMS uses the heap as the unit, protect whole heap electric core according to every electric core SOC threshold value, stop to electric core charge-discharge, in the charge-discharge process of battery, because every circuit length to the busbar that converges, internal resistance is inconsistent, according to ohm law I U/R (I is the electric current, U is the voltage, R is resistance), so the electric current size of distributing every cluster will be different, every cluster charge-discharge time, calorific capacity will be inconsistent, can lead to every cluster battery package PACK at last to charge the degree of depth DOD inconsistent, life also has the difference, this kind of phenomenon is more obvious in the power type energy storage system of heavy current. In the prior art, the battery packs are connected in series by power cables, and the total positive and total negative of the battery clusters are respectively gathered to the positive electrode and the negative electrode of the bus bar of the DC bus cabinet by the cables, so that more manpower is consumed. In addition, the power cables are adopted to lead out the positive and negative cables at the same time, so that the wiring and the maintenance are inconvenient, the short circuit is easy, and a fire disaster or an electric shock accident of personnel occurs.
In view of the above, it is an urgent technical problem in the art to provide a new battery energy storage system to overcome the above drawbacks in the prior art.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art and providing a battery energy storage system.
The object of the invention can be achieved by the following technical measures:
the invention provides a battery energy storage system, comprising:
the battery rack module is provided with a plurality of cavities which are sequentially and continuously arranged;
the direct current bus positive bus bar is arranged at the top of the battery rack module;
the direct current bus negative electrode bus bar is arranged at the bottom of the battery frame module;
locate a plurality of battery clusters that arrange in proper order on the battery frame module, each the battery cluster includes: total positive output, total negative output and locating total positive output with a plurality of battery array between the total negative output, total positive output with the positive generating line row that the direct current converges is connected, total negative output with the negative generating line row that the direct current converges is connected, each battery array includes a plurality of battery package that concatenate in proper order, the cavity with battery package one-to-one, the positive pole of two adjacent battery packages is located same one side, and the negative pole of two adjacent battery packages is located same one side, connect through soft copper row between the battery package.
Preferably, the outer surface of the soft copper bar is provided with an insulating sleeve, and the joints of the soft copper bar and the positive electrode and the negative electrode of the battery pack are respectively provided with an insulating protective cover.
Preferably, the total positive output end of the battery cluster is connected with the direct current bus positive bus bar through a copper bar, and the total negative output end of the battery cluster is connected with the direct current bus negative bus bar through a copper bar.
Preferably, the outer surface of the copper bar is provided with an insulating sleeve, and the direct current bus positive electrode bar and the direct current bus negative electrode bar are fixed by a wood-padded bus clamp.
Preferably, the system further comprises a control box arranged between the total negative output end of the battery cluster and the direct current bus negative bus bar and a power supply used for supplying power to the control box, and a connector used for connecting the total negative output end of the battery cluster and a connector used for connecting the direct current bus negative bus bar are arranged on the back of the control box.
Preferably, the control box includes: the controller is connected with the pre-charging circuit, one end of the pre-charging circuit is connected with the shunt, the other end of the pre-charging circuit is connected with the DC bus negative bus bar, and the controller is connected with the pre-charging circuit; the precharge circuit includes: the direct current bus bar type direct current contactor comprises a first direct current contactor, a second direct current contactor and a pre-charging resistor, wherein a positive terminal of the first direct current contactor is connected with a shunt, a negative terminal of the first direct current contactor is connected with the direct current bus bar negative electrode bus bar, one end of the pre-charging resistor is arranged between the shunt and the positive terminal of the first direct current contactor, the other end of the pre-charging resistor is connected with a positive terminal of the second direct current contactor, and a negative terminal of the second direct current contactor is arranged between the negative terminal of the first direct current contactor and the direct current bus bar negative electrode bus bar; the controller is respectively connected with the first direct current contactor and the second direct current contactor.
Preferably, a third dc contactor is arranged between the total positive output end of the battery cluster and the dc bus bar, and the third dc contactor is connected to the controller.
Preferably, at least one splitting maintenance switch is inserted into the battery cluster and used for splitting maintenance of the battery cluster, the splitting maintenance switch is linked with the controller, and the controller receives state information of the splitting maintenance switch to control the connection of the state information with the first direct current contactor, the second direct current contactor and the third direct current contactor.
Preferably, the splitting maintenance switch comprises a splitting switch module arranged in the inserted battery cluster and an interface module matched with the splitting switch module, the splitting switch module is detachably connected with the interface module, and the interface module is combined with/separated from the splitting switch module to control the electrical connection/disconnection between the battery arrays.
Preferably, the battery cluster is divided into at least two battery arrays by the aid of the splitting maintenance switch, and the splitting maintenance switch is arranged in a cavity of the battery rack module.
According to the battery energy storage system, on one hand, the power loop connection between the battery packs adopts the soft copper bars to replace the traditional power cables, so that the labor cost can be effectively reduced, the difference between the circuit length and the internal resistance of the battery cluster is reduced, the current equalization of the battery cluster is ensured, the electrical property consistency is good, the energy efficiency of the battery cluster is improved, and the service life of the battery cluster is prolonged; on the other hand, the direct current bus positive bus bar and the direct current bus negative bus bar are respectively arranged on two sides of the battery frame module at intervals, so that the total positive output end and the total negative output end of the battery cluster are prevented from being simultaneously led out, the wiring and the maintenance are convenient, and the safety distance between the positive electrode and the negative electrode is ensured, so that the risks of short circuit and electric leakage are effectively reduced.
Drawings
Fig. 1 is an electrical distribution diagram of a first embodiment of the system of the present invention.
Fig. 2 is a schematic diagram of a first embodiment of the system of the present invention.
Fig. 3 is an electrical distribution diagram of a second embodiment of the system of the present invention.
Fig. 4 is a schematic diagram of a second embodiment of the system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Many aspects of the invention are better understood with reference to the following drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, in the several views of the drawings, like reference numerals designate corresponding parts.
The word "exemplary" or "illustrative" as used herein means serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments provided to enable persons skilled in the art to make and use the examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other instances, well-known features and methods are described in detail so as not to obscure the invention. For purposes of the description herein, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," and derivatives thereof shall relate to the invention as oriented in fig. 1. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
According to the battery energy storage system provided by the embodiment of the invention, on one hand, the power loop connection between the battery packs adopts the soft copper bars to replace the traditional power cables, so that the labor cost can be effectively reduced, the difference between the circuit length and the internal resistance of the battery cluster is reduced, the current equalization of the battery cluster is ensured, the electrical property consistency is good, the energy efficiency of the battery cluster is improved, and the service life of the battery cluster is prolonged; on the other hand, the direct current bus positive bus bar and the direct current bus negative bus bar are respectively arranged on two sides of the battery frame module at intervals, so that the total positive output end and the total negative output end of the battery cluster are prevented from being simultaneously led out, the wiring and the maintenance are convenient, and the safety distance between the positive electrode and the negative electrode is ensured, so that the risks of short circuit and electric leakage are effectively reduced.
Referring to fig. 1, fig. 1 shows an electrical distribution diagram of a battery energy storage system, which includes: the battery rack module 10, the direct current bus positive bus bar 20, the direct current bus negative bus bar 30 and a plurality of battery clusters N.
The direct current bus positive bus bar 20 is arranged at the top of the battery rack module 10, and the direct current bus negative bus bar 30 is arranged at the bottom of the battery rack module 10; a battery holder module 10 having a plurality of cavities 1000 sequentially and continuously arranged; a plurality of battery cluster N arrange in proper order and locate on battery frame module 10, and each battery cluster N includes: total positive output terminal BAT+And a total negative output terminal BAT-And is arranged at the total positive output terminal BAT+And a total negative output terminal BAT-A plurality of battery arrays in between, a total positive output terminal BAT+Connected with a DC bus bar 20 with positive and negative terminals BAT-Is connected with the DC bus negative bus bar 30, each battery array comprises a plurality of battery packs which are connected in series in sequence, the cavity 1000 is in one-to-one correspondence with the battery packs, and the positive electrodes of two adjacent battery packsThe poles are positioned on the same side, the cathodes of two adjacent battery packs are positioned on the same side, and the battery packs are connected through a soft copper bar 40.
In the embodiment, the power loop connection between the battery packs adopts the soft copper bar 40 to replace the traditional power cable, the soft copper bar 40 is formed by machining, the machining precision is high, the consistency is good, the cutting and cold-rolled terminal crimping processing of the power cable generally adopts manual machining, more artificial unstable factors exist, the consistency of the finished power cable is poor, the production cost is high, greater risks exist when the cold-pressed terminal of the power cable is adopted for crimping, for example, the internal resistance is increased when the cold-pressed head of a copper nose is not tightly crimped, the contact surface of the crimped cable is not enough, and the like, and the crimped point can generate heat when a large current passes through, so that the cable is burnt and the fire risk is caused; the connection mode that adopts soft copper bar 40 in this embodiment not only can reduce copper nose crimping manufacturing procedure, reduces because the risk that the power cable processing is bad brings, effectively reduces the cost of labor moreover, reduces the difference of circuit length, the internal resistance of battery cluster N, guarantees that battery cluster N flow equalizes, and the electrical property uniformity is good to improve the efficiency of battery cluster N, prolong the life of battery cluster N.
In the present embodiment, referring to fig. 1, each battery cluster N includes a battery pack a and a battery pack B …, the battery rack module 10 includes a plurality of battery racks 100, and the plurality of battery racks 100 are disposed in parallel in the horizontal direction and the vertical direction.
Specifically, referring to fig. 1, the battery rack module 10 includes a first wall 101, a second wall 102, a third wall 103 and a fourth wall 104 spaced apart from and parallel to each other, the first wall 101, the second wall 102, the third wall 103 and the fourth wall 104 divide the battery rack module 10 into three rows, namely a first row 11, a second row 12 and a third row 13, wherein the first row 11 includes the first wall 101 and the second wall 102, the second row 12 includes the second wall 102 and the third wall 103, the third row 13 includes the third wall 103 and the fourth wall 104, each row correspondingly accommodates one battery cluster N, as shown in fig. 1, the battery packs a to F of one battery cluster N are sequentially and continuously arranged in the first row 11 from bottom to top, the second row 12 and the third row 13 also respectively accommodate one battery cluster N, and when the number of the battery clusters N is greater than threeIn this case, the analogy is repeated. The positive electrodes of two adjacent battery packs are located on the same side, for example, battery pack a and battery pack B; the cathodes of two adjacent battery packs are located on the same side, for example, the battery pack a and the battery pack B, that is, the anodes of the battery packs a to F in the first row 11 are located on the side where the first wall 101 is located, the cathodes are located on the side where the second wall 102 is located, the anodes of the battery packs a to F in the second row 12 are located on the side where the second wall 102 is located, the cathodes are located on the side where the third wall 103 is located, the anodes of the battery packs a to F in the third row 13 are located on the side where the third wall 103 is located, and the cathodes are located on the side where the fourth wall 104 is located. The battery packs are connected through the soft copper bar 40, and when the positive and negative electrodes of the battery packs are connected, as shown in fig. 1, in the first row 11, the negative electrode of the battery pack A and the total negative output terminal BAT of the battery cluster N-Connected, the total negative output terminal BAT of the battery cluster N-Connected with a DC bus bar 30, the positive electrode of the battery pack F and the total positive output terminal BAT of the battery cluster N+Connected, the total positive output terminal BAT of the battery cluster N+And the direct current bus bar 20 is connected with the positive bus bar, the positive electrode of the battery pack A is connected with the negative electrode of the battery pack B in an S shape, the negative electrode of the battery pack F is connected with the positive electrode of the battery pack E in an S shape, and the rest is done in the same way.
In the embodiment, the positive electrode and the negative electrode of the adjacent battery packs are connected in an S shape, so that the space distance between the positive electrode and the negative electrode is effectively increased, the short circuit of a circuit is prevented, and the safety of the circuit is ensured; total positive output terminal BAT of each battery cluster N+And a total negative output terminal BAT-The bus bars are respectively connected to a direct current bus positive bus bar 20 and a direct current bus negative bus bar 30 with space intervals, wiring is convenient, maintenance is convenient, safe distance and electrical insulation are increased, electrical safety influence caused by external uncontrollable factors is reduced, and therefore safe and reliable operation of core components is protected.
On the basis of the above embodiment, further, in this embodiment, an insulating sleeve (not shown in the figure) is disposed on the outer surface of the flexible copper bar 40, and insulating protective covers (not shown in the figure) are respectively disposed at the joints of the flexible copper bar 40 and the positive electrode and the negative electrode of the battery pack a and the battery pack B … battery pack F, so as to prevent the positive electrode and the negative electrode of the battery pack a and the battery pack B … battery pack F from being exposed to cause short circuit, enhance electrical insulation, and prevent personnel from getting an electric shock.
Further, the total positive output terminal BAT of the battery cluster N+Connected with the DC bus positive bus bar 20 via a copper bar (not shown), and a total negative output terminal BAT of the battery cluster N-And the direct current bus negative electrode bus bar 30 is connected with the direct current bus negative electrode bus bar through a copper bar, so that the current equalization and the good electrical property consistency of the battery cluster N are ensured, and the service life of the battery cluster N is prolonged. The insulating sleeve (not shown in the figure) has been installed to copper bar surface, and direct current flows the anodal generating line row 20 of converging and direct current flows negative pole generating line row 30 and adopts the lumber skid generating line to press from both sides (not shown in the figure) fixed, and increase electric safety is apart from, reduces electric leakage, electrocution risk.
In the present embodiment, please refer to fig. 1 and fig. 2, fig. 2 is a schematic diagram corresponding to fig. 1, the system further includes a control box 50 and a power supply 60, and the total negative output terminal BAT of each battery cluster N+The control boxes 50 are arranged between the direct current bus negative electrode bus bar 30, the power supply 60 is connected with the control boxes 50 and used for supplying power to the control boxes 50, and the back of the control boxes 50 is provided with a general negative output terminal BAT used for being connected with a battery cluster N-And a connector 52 for connecting to the dc bus negative bus bar 30. Battery cluster N total negative output terminal BAT-The direct current bus negative electrode bus bar 30 and the control box 50 are connected through the modularization setting, so that the space is effectively and reasonably utilized, the assembly and the maintenance are convenient, the N circuit length of the battery cluster is reduced, and the energy efficiency of the battery cluster N is improved.
Further, referring to fig. 2, the control box 50 includes: the controller 501, the shunt 502 and the pre-charge circuit 503 for collecting direct current, the shunt 502 and the battery cluster N total negative output terminal BAT-One end of a pre-charging circuit 503 is connected with the shunt 502, the other end is connected with the DC bus negative bus bar 30, and a controller 501 is connected with the pre-charging circuit 503; the precharge circuit 503 includes: a first DC contactor KM1, a second DC contactor KM2 and a pre-charging resistor R, wherein the positive wiring column of the first DC contactor KM1 is connected with the current divider 502, and the negative wiring of the first DC contactor KM1The post is connected with the direct current bus negative bus bar 30, one end of a pre-charging resistor R is arranged between the shunt 502 and the positive wiring post of the first direct current contactor KM1, the other end of the pre-charging resistor R is connected with the positive wiring of the second direct current contactor KM2, and the negative wiring post of the second direct current contactor KM2 is arranged between the negative wiring post of the first direct current contactor KM1 and the direct current bus negative bus bar 30; the controller 501 is connected to the first dc contactor KM1 and the second dc contactor KM2, respectively.
Further, referring to fig. 1 and 2, the total positive output terminal BAT of each battery cluster N+A third dc contactor KM3 is arranged between the dc bus positive electrode bus bar 20 and the third dc contactor KM3 is connected to the controller 501.
In this embodiment, the controller 501 controls the turn-on sequence of the dc contactor to control the impulse current when the system is turned on, and in this process, the current is controlled by the pre-charging resistor R, so as to prevent the large current from burning out the electrical devices and circuits when the system is turned on, protect the battery cluster N, and prolong the service life of the system.
On the basis of the above embodiments, in the present embodiment, please refer to fig. 3 and fig. 4, fig. 3 is a second electrical distribution diagram of the battery energy storage system, and fig. 4 is a schematic diagram corresponding to fig. 3. Each battery cluster N is inserted with a cracking overhaul switch 70, the cracking overhaul switch 70 is used for cracking overhaul of the battery cluster N, the cracking overhaul switch 70 is linked with the controller 501, and the controller 501 receives state information of the cracking overhaul switch 70 to control the connection of the state information with the first direct current contactor KM1, the second direct current contactor KM2 and the third direct current contactor KM 3. When the controller 501 receives that the overhaul switch 70 is in an open state, namely the system is in an off state, the controller 501 is disconnected from the first direct current contactor KM1, the second direct current contactor KM2 and the third direct current contactor KM 3; when the controller 501 receives that the overhaul switch 70 is in a closed state, that is, the system is in a closed state, the controller 501 is in control connection with the first direct current contactor KM1, the second direct current contactor KM2 and the third direct current contactor KM3 and controls the connection sequence of the first direct current contactor KM1, the second direct current contactor KM2 and the third direct current contactor KM 3.
Further, the disconnecting maintenance switch 70 includes a disconnecting switch module (not shown) disposed in the battery cluster N and an interface module (not shown) cooperating with the disconnecting switch module, and the disconnecting switch module is detachably connected to the interface module and is combined with/disconnected from the disconnecting switch module through the interface module to control electrical connection/disconnection between the battery arrays.
Further, the battery cluster N is divided into two battery arrays by the break-down maintenance switch 70, and the break-down maintenance switch 70 is disposed in the cavity 1000 of the battery rack module 10.
Specifically, referring to fig. 3 and 4, as shown in the first column 11, the breakdown maintenance switch 70 is disposed between the battery pack C and the battery pack D, a negative electrode of an output end of the battery pack D is connected to an input end of the breakdown maintenance switch 70, and an output end of the breakdown maintenance switch 70 is connected to a positive electrode of an input end of the battery pack C; when the splitting switch module and the interface module are disconnected, the battery cluster N is divided into two battery arrays which are respectively a battery pack A to a battery pack C and a battery pack D to a battery pack F; at this time, the voltage of each battery array is reduced by about 1/2Un (Un is a rated voltage), the space distance between the positive electrode and the negative electrode between the battery arrays is doubled, and when the splitting switch module is combined with the interface module, the battery pack a is electrically connected with the battery pack C, and the battery pack D is electrically connected with the battery pack F again. The second row 12 and the third row 13 are also provided with a break-open service switch 70 at the same location, which is not described in detail here. When the number of battery packs and the number of the rupturing service switches 70 are larger, and so on, the description is omitted.
The arrangement mode is convenient for the installation and the maintenance of the crack overhaul switch 70 on one hand, and the maintenance cost is reduced; on the other hand only need break apart split switch module and interface module, just can directly split into a plurality of battery arrays with battery cluster N, thereby reduce battery cluster N's voltage, need not dismantle battery package A, battery package B … battery package F and pack the transportation alone, packing and cost of transportation have been reduced, overhaul on the scene simultaneously and only need combine split switch module and interface module, just can accomplish whole battery cluster N's electrical connection, the process of battery cluster N transportation to on-the-spot reinstallation has been reduced, the use in cost of labor and interim large tracts of land place has been reduced, the manual work repeat operation has been reduced, the potential safety hazard that uncontrollable factor brought.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A battery energy storage system, comprising: the battery rack module is provided with a plurality of cavities which are sequentially and continuously arranged; the direct current bus positive bus bar is arranged at the top of the battery rack module; the direct current bus negative electrode bus bar is arranged at the bottom of the battery frame module; locate a plurality of battery clusters that arrange in proper order on the battery frame module, each the battery cluster includes: the battery pack comprises a total positive output end, a total negative output end and a plurality of battery arrays arranged between the total positive output end and the total negative output end, wherein the total positive output end is connected with the direct current confluence positive bus bar, the total negative output end is connected with the direct current confluence negative bus bar, each battery array comprises a plurality of battery packs which are sequentially connected in series, the cavities are in one-to-one correspondence with the battery packs, the positive electrodes of two adjacent battery packs are positioned on the same side, the negative electrodes of two adjacent battery packs are positioned on the same side, and the battery packs are connected through a soft copper bar; the system also comprises a control box arranged between the total negative output end of the battery cluster and the direct current bus negative bus bar and a power supply used for supplying power to the control box, wherein the back of the control box is provided with a connector used for connecting the total negative output end of the battery cluster and a connector used for connecting the direct current bus negative bus bar.
2. The battery energy storage system of claim 1, wherein an insulating sleeve is arranged on the outer surface of the soft copper bar, and insulating protective covers are respectively arranged at the joints of the soft copper bar and the positive electrode and the negative electrode of the battery pack.
3. The battery energy storage system of claim 1, wherein the total positive output end of the battery cluster is connected with the DC bus positive bus bar through a copper bar, and the total negative output end of the battery cluster is connected with the DC bus negative bus bar through a copper bar.
4. The battery energy storage system of claim 3, wherein an insulating sleeve is arranged on the outer surface of the copper bar, and the DC bus positive bus bar and the DC bus negative bus bar are fixed by a wood-padded bus bar clamp.
5. The battery energy storage system of claim 1, wherein the control box comprises: the controller is connected with the pre-charging circuit, one end of the pre-charging circuit is connected with the shunt, the other end of the pre-charging circuit is connected with the DC bus negative bus bar, and the controller is connected with the pre-charging circuit; the precharge circuit includes: the direct current bus bar type direct current contactor comprises a first direct current contactor, a second direct current contactor and a pre-charging resistor, wherein a positive terminal of the first direct current contactor is connected with a shunt, a negative terminal of the first direct current contactor is connected with the direct current bus bar negative electrode bus bar, one end of the pre-charging resistor is arranged between the shunt and the positive terminal of the first direct current contactor, the other end of the pre-charging resistor is connected with a positive terminal of the second direct current contactor, and a negative terminal of the second direct current contactor is arranged between the negative terminal of the first direct current contactor and the direct current bus bar negative electrode bus bar; the controller is respectively connected with the first direct current contactor and the second direct current contactor.
6. The battery energy storage system of claim 5, wherein a third DC contactor is arranged between the total positive output end of the battery cluster and the DC bus bar, and the third DC contactor is connected with the controller.
7. The battery energy storage system of claim 6, wherein at least one breaker service switch is inserted into the battery cluster, the breaker service switch is used for breaker service of the battery cluster, the breaker service switch is linked with the controller, and the controller receives status information of the breaker service switch to control the controller to be in contact with the first DC contactor, the second DC contactor and the third DC contactor.
8. The battery energy storage system of claim 7, wherein the battery pack comprises a battery pack having a battery pack and a battery pack having a battery pack, wherein the battery pack comprises a battery pack having a battery pack, and a battery pack having a battery pack and a battery pack, wherein the battery pack is detachably connected to the battery pack, and the battery pack is connected to/disconnected from the battery pack by the battery pack.
9. The battery energy storage system of claim 8, wherein the battery cluster is partitioned into at least two battery arrays by the break-away service switch, the break-away service switch being disposed in a cavity of the battery rack module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009736.XA CN109286046B (en) | 2018-08-31 | 2018-08-31 | Battery energy storage system |
Applications Claiming Priority (1)
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| CN111276989B (en) * | 2020-02-26 | 2023-08-08 | 深圳市科陆电子科技股份有限公司 | Energy storage control protection method and system |
| CN112054154A (en) * | 2020-08-10 | 2020-12-08 | 东风时代(武汉)电池系统有限公司 | Method and system for improving energy efficiency of power battery |
| CN111953077A (en) * | 2020-08-20 | 2020-11-17 | 深圳市雄韬电源科技股份有限公司 | Novel high-voltage energy storage device |
| CN113036317A (en) * | 2021-03-02 | 2021-06-25 | 阳光电源股份有限公司 | Battery cluster and energy storage system |
| CN116742294B (en) * | 2023-08-15 | 2023-10-27 | 江苏天合储能有限公司 | Control method of battery cluster and energy storage system |
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