Energy storage integrated confluence cabinet and battery energy storage system

Abstract

The invention relates to the technical field of batteries, and discloses an energy storage combined confluence cabinet and a battery energy storage system.The energy storage combined confluence cabinet comprises a cabinet, the cabinet is internally provided with a containing space, and the containing space is provided with an uninterruptible power supply chamber, a power distribution chamber, a confluence chamber and a wiring chamber; the uninterruptible power supply chamber, the power distribution chamber and the confluence chamber are arranged along a first direction, the uninterruptible power supply chamber is arranged close to the top of the cabinet, and the confluence chamber is arranged close to the bottom of the cabinet; the wiring chamber is located on the side edge of the distribution chamber and the convergence chamber and extends in the first direction. The power distribution room comprises a plurality of power distribution modules, the power distribution module close to the confluence room comprises a power distribution plug-in box, one side of the power distribution plug-in box facing the confluence room is provided with a bottom plate, and one side of the bottom plate deviating from the confluence room is used for placing power distribution components; a separator plate is arranged between the confluence chamber and the wiring chamber. According to the energy storage integrated confluence cabinet disclosed by the invention, the internal space and the integration level of the cabinet are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an energy storage combined junction cabinet and a battery energy storage system. Background Art

[0002] At present, the market is very concerned about the energy ratio and cost of battery energy storage systems. Taking energy storage container products as an example, it is a general trend that containers of the same size can store more electricity and integrate more equipment. However, the existing battery energy storage products, the supporting distribution cabinets and junction cabinets are mostly in the form of split, that is, the distribution cabinets and junction cabinets are separate cabinets, and the space utilization rate of the separate distribution cabinets and junction cabinets is very low, which is not conducive to improving the integration inside the cabinets. Summary of the invention

[0003] The present application provides an energy storage combined junction cabinet and a battery energy storage system, which can not only improve the space utilization rate inside the energy storage combined junction cabinet, but also improve the integration inside the cabinet.

[0004] In a first aspect, the present application provides an energy storage combined junction cabinet, comprising a cabinet, wherein the cabinet has a housing space inside, wherein the housing space is provided with an uninterruptible power supply room, a power distribution room, a junction room, and a wiring room;

[0005] The uninterruptible power supply room, the power distribution room and the confluence room are arranged along a first direction, the first direction being the arrangement direction between the top and the bottom of the cabinet, the uninterruptible power supply room is arranged close to the top of the cabinet, and the confluence room is arranged close to the bottom of the cabinet;

[0006] The wiring chamber is located at the side of the power distribution chamber and the confluence chamber, the wiring chamber and the power distribution chamber are arranged along the second direction, and the wiring chamber extends along the first direction;

[0007] The power distribution room includes a plurality of power distribution modules, the power distribution module close to the confluence room includes a power distribution plug-in box, a bottom plate is provided on the side of the power distribution plug-in box facing the confluence room, and a side of the bottom plate facing away from the confluence room is used for placing power distribution components;

[0008] A partition is provided between the confluence chamber and the wiring chamber.

[0009] The energy storage combined junction cabinet provided by the present application integrates the power distribution room, junction room, uninterruptible power supply room and wiring room into one cabinet, thereby improving the space utilization rate in the cabinet. In addition, since the high-voltage junction function and the low-voltage power distribution function are combined in one cabinet, the integration inside the cabinet can be improved and the space occupied can be reduced. Inside the cabinet, by setting a partition between the junction room and the wiring room, the partition has the function of shielding electromagnetics, which can prevent the magnetic field generated by the high-voltage equipment in the junction room from affecting the low-voltage distribution line in the wiring room, thereby ensuring that the junction room and the wiring room can operate normally. In addition, the power distribution module of the distribution room close to the junction room is shielded by setting a distribution plug-in box, and the bottom plate of the distribution plug-in box can shield electromagnetics, so as to prevent the magnetic field generated by the high-voltage equipment in the junction room from affecting the low-voltage distribution equipment in the distribution room, thereby ensuring that the distribution room can operate normally. Therefore, the energy storage combined junction cabinet provided by the present application can ensure the normal operation of each device while integrating the power distribution room and the junction room into one cabinet, improving the space utilization rate and integration rate.

[0010] In some possible implementation schemes, each of the power distribution modules includes a power distribution plug-in box, and each of the power distribution plug-in boxes is arranged along the first direction;

[0011] Each of the power distribution plug-in boxes comprises the bottom plate and a plurality of panels, and the plurality of panels and the bottom plate are arranged to form a box structure of the power distribution plug-in box.

[0012] In some possible implementation schemes, the cabinet is provided with cabinet doors and a back panel that are arranged opposite to each other, and a mesh structure is provided at a portion of each bottom panel close to the back panel.

[0013] In some possible implementation schemes, an air inlet mesh is provided at a portion of the cabinet door near the bottom of the cabinet, and an air outlet is provided at the top of the cabinet. The air inlet mesh, the confluence chamber, each mesh structure, the uninterruptible power supply chamber and the air outlet are connected in sequence to form a heat dissipation channel.

[0014] In some possible implementation schemes, each of the power distribution boxes is provided with a plurality of switch handles on the panel facing the cabinet door.

[0015] In some possible implementation schemes, each of the power distribution boxes is provided with a plurality of pluggable interfaces on a panel facing the wiring room, and the pluggable interfaces are used to connect to cables in the wiring room.

[0016] In some possible implementation schemes, at least two wiring troughs are provided in the wiring room, wherein a portion of the wiring troughs is used for arranging power lines, and another portion of the wiring troughs is used for arranging communication lines.

[0017] In some possible implementation schemes, the panel of each of the power distribution boxes is provided with a device label.

[0018] In some possible implementation schemes, a circuit breaker assembly, an input copper bar and an output copper bar are provided in the junction chamber, and the input copper bar and the output copper bar are both connected to the circuit breaker assembly;

[0019] The input copper bar and the output copper bar are arranged along the second direction, and the input copper bar and the output copper bar extend along the first direction respectively.

[0020] In some possible implementations, the circuit breaker assembly includes at least one frame circuit breaker, and each of the frame circuit breakers is connected to an energy storage stack through a pair of the input copper bar and the output copper bar; or

[0021] The circuit breaker assembly includes at least one molded case circuit breaker, each of which is connected to an energy storage stack via a pair of the input copper bar and the output copper bar; or

[0022] The circuit breaker assembly includes at least one load switch, and each of the load switches is connected to an energy storage stack through a pair of the input copper busbar and the output copper busbar.

[0023] In some possible implementation schemes, both the junction chamber and the power distribution chamber are provided with surge protectors.

[0024] In some possible implementation schemes, the partition is detachably connected to the cabinet.

[0025] In a second aspect, the present application provides a battery energy storage system, comprising an energy storage combined junction cabinet as described in any possible implementation scheme of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an electrical schematic diagram of the battery energy storage system in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the overall structure of the energy storage combined combiner cabinet in the embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the internal partition of the energy storage combined combiner cabinet in the embodiment of the present application;

[0029] Figure 4 This is a schematic diagram of the specific structure inside the energy storage combined combiner cabinet in the embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of the power distribution module in the embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of a wiring trough in an embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of a portion of the structure in the confluence chamber in an embodiment of the present application;

[0033] Figure 8 Another structural schematic diagram of the confluence chamber in the embodiment of the present application;

[0034] Fig. 9 This is a schematic diagram of the structure of the cabinet door of the cabinet in the embodiment of the present application;

[0035] Fig.10 Schematic diagram of the structure of the heat dissipation channel inside the cabinet in the embodiment of the present application.

[0036] In the figure:

[0037] 100-cabinet; 110-top plate; 120-bottom carrier plate; 130-cabinet door; 131-upper door; 1311-indicator light; 1312-display control; 1313-emergency stop button; 132-lower door; 1321-observation window; 1322-air inlet mesh; 140-back plate; 150-side plate; 160-crossbeam; 170-partition plate; 180-fan; 200-uninterruptible power supply room; 210-uninterruptible power supply host; 220-backup battery pack; 300-distribution room; 310, 310 a, 310b, 310c-power distribution module; 311-power distribution plug-in box; 3111-base plate; 3112-panel; 3113-switch handle; 3114, 3114a, 3114b-pluggable interface; 3115-mesh structure; 312-power distribution components; 400-confluence chamber; 410-circuit breaker assembly; 411-molded case circuit breaker; 420-input copper busbar; 430-output copper busbar; 500-wiring chamber; 510, 510a, 510b-wiring trough; 600-heat dissipation channel. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] With the continuous development of battery energy storage systems, the market's requirements for battery energy storage systems have also increased. Taking energy storage container products as an example, it is a general trend that containers of the same size can store more electricity and integrate more equipment. The existing battery energy storage products, the supporting distribution cabinets and junction cabinets are mostly in the form of split, which leads to low space utilization of the distribution cabinets and junction cabinets. Most of the components in the cabinet are bulked on the beams inside the cabinet or the back mounting plate, and the cabinet depth space utilization is very low. Secondly, the incoming copper busbar and the outgoing copper busbar in the junction cabinet are arranged one after the other in the depth direction of the cabinet. Once the copper busbar in the front (near the cabinet door) is connected, it will cause the copper busbar in the back to be inconvenient to operate, and it is easy to interfere with each other. In addition, most of the components in the distribution cabinet are installed in bulk on the beams in the cabinet. Since the beams are located in a deeper part of the cabinet (that is, far away from the cabinet door), it is easy to cause confusion in component identification and inconvenience in operation. At the same time, the wiring paths of the components of the power distribution cabinet frequently cross each other, and the power lines and communication lines usually run in the same wire duct. Once a single component or line fails, maintenance will cause a large area of ​​the line to be disconnected, which is not convenient for later maintenance. In addition, there is a lack of spatial shielding and isolation between the high-voltage components and low-voltage lines in the junction box, which is prone to electromagnetic interference.

[0040] Based on this, the embodiment of the present application provides an energy storage combined junction cabinet and a battery energy storage system, which are used to solve the problems of low integration, inconvenient junction wiring, inconvenient switch operation, poor maintainability, and high and low voltage electromagnetic interference in the existing battery energy storage system. The above energy storage combined junction cabinet and battery energy storage system are described in detail below in conjunction with specific embodiments.

[0041] refer to Figure 1 , Figure 1 This is an electrical schematic diagram of the battery energy storage system in the embodiment of the present application. The battery energy storage system in this embodiment includes a convergence part and a distribution part, wherein the convergence part is a DC circuit and the distribution part is an AC circuit. Specifically, in the convergence part, the battery cluster can output DC power, which is converged through a high-voltage box and a DC cable to the convergence room. Then the DC power output through the convergence room is output to the energy storage converter (power conversion system, PCS) for AC inversion and grid connection, and finally output to the external power grid. The distribution part mainly supplies power to the internal equipment of the battery energy storage system. It can obtain AC power from an external power supply. The power supply is input to the distribution room after passing through an isolation transformer. The power supply priority management is performed in the distribution room and the importance of the load. For example, the distribution room supplies power to the battery management system (battery management system, BMS), switches and fire-fighting equipment, and can also supply power to air conditioners, cabinet fans, and lighting equipment.

[0042] refer to Figures 2 to 4 , Figure 2 This is a schematic diagram of the overall structure of the energy storage combined cabinet in the embodiment of the present application. Figure 3 This is a schematic diagram of the internal partition of the energy storage combined combiner cabinet in the embodiment of the present application. Figure 4 It is a schematic diagram of the specific structure inside the energy storage combined junction cabinet in the embodiment of the present application. The energy storage combined junction cabinet in the embodiment of the present application includes a cabinet 100, and the cabinet 100 includes a top plate 110 and a bottom carrier plate 120 arranged oppositely, a cabinet door 130 and a back plate 140 arranged oppositely, and two side plates 150 arranged oppositely. The top plate 110, the bottom carrier plate 120, the cabinet door 130, the back plate 140 and the two side plates 150 are arranged to form a cabinet 100 with an accommodating space inside. The cabinet door 130 can be in an open or closed state. When the cabinet door 130 is in an open state, the operator can operate the equipment inside the cabinet 100. Among them, the top plate 110 and the bottom carrier plate 120 are arranged along the first direction, the two side plates 150 are arranged along the second direction, and the cabinet door 130 and the back plate 140 are arranged along the third direction.

[0043] The interior of the cabinet 100 is respectively arranged with an uninterruptible power supply room 200, a distribution room 300, a junction room 400 and a wiring room 500. The uninterruptible power supply room 200 is arranged close to the top plate 110, the junction room 400 is arranged close to the bottom carrier plate 120, and the distribution room 300 is located between the uninterruptible power supply room 200 and the junction room 400. In other words, the uninterruptible power supply room 200, the distribution room 300 and the junction room 400 are arranged in sequence along a first direction. The wiring room 500 is located on one side of the distribution room 300 and the junction room 400, and the wiring room 500 and the distribution room 300 are arranged along a second direction. The wiring room 500 is used to lay out the distribution lines for the convenience of connecting with the distribution room 300. It can be understood that the energy storage combined junction cabinet in this embodiment will Figure 1 The power distribution room and the junction room are integrated into a cabinet 100, thereby improving the integration. In addition, integrating the power distribution room 300 and the junction room 400 into a cabinet 100 can not only reduce costs, but also reduce the overall occupied space of the battery energy storage system, which can expand more power space for the battery pack, thereby increasing the energy volume of the battery energy storage system.

[0044] In this embodiment, an uninterruptible power supply host 210 and a backup battery pack 220 can be arranged in the uninterruptible power supply room 200. When the mains power is cut off, the uninterruptible power supply host 210 and the backup battery pack 220 can provide uninterruptible power supply to the equipment in the cabinet 100 for a certain period of time. A plurality of distribution modules 310 are arranged in the power distribution room 300. Each distribution module 310 can distribute current to different loads and control the on and off of the distribution circuit. The number of distribution modules 310 can be designed according to actual use requirements. For example, when three distribution modules 310 are provided, the three distribution modules 310 are respectively distribution modules 310a, distribution modules 310b and distribution modules 310c. The distribution module 310a can include a main circuit breaker switch for AC380V mains power to enter and a power-on indicator light 1311, and can also manually control the on and off of the distribution circuit, and has a separation tripping function to ensure that the mains load is cut off when the fire is started. The power distribution module 310a can also be installed with an electric energy meter to display the amount of electricity, and to display the working voltage and current status. In addition, the power distribution module 310a can be used to control the three-way switching of the direct mains branch, the energy storage converter branch, and the uninterruptible current branch. The power distribution module 310b and the power distribution module 310c can be configured the same. For example, the power distribution module 310b and the power distribution module 310c can both be configured with multiple AC380V, multiple AC220V, and multiple DC24V, so as to control different loads respectively. Alternatively, the power distribution module 310b and the power distribution module 310c can also configure circuits for communication switches and communication converters.

[0045] Continue to refer Figure 4 As mentioned above, the power distribution room 300 and the confluence room 400 in this embodiment are located in a cabinet 100. Two crossbeams 160 may be provided inside the cabinet 100. The two ends of each crossbeam 160 are respectively fixed to the side panels 150 on both sides, so that the inside of the cabinet 100 is divided into three spaces along the first direction. The space between the lower crossbeam 160 and the bottom carrier plate 120 is used to configure the confluence room 400, the space between the two crossbeams 160 is used to configure the power distribution room 300, and the space between the upper crossbeam 160 and the top plate 110 is used to configure the uninterruptible power supply room 200. In addition, the crossbeam 160 can also play the role of bearing and supporting the power distribution room 300 and the uninterruptible power supply room 200, so as to keep the multiple power distribution modules 310 and the backup battery pack 220 stably placed inside the cabinet 100.

[0046] Continue to refer Figure 4A partition 170 is provided between the confluence chamber 400 and the wiring chamber 500. The material of the partition 170 may be a composite material, or the material of the partition 170 may be a combination of metal and insulating material. Since the magnetic field generated by the high-voltage equipment in the confluence chamber 400 when starting or working will affect the low-voltage line in the wiring chamber 500, when the partition 170 is provided, the insulation isolation, electromagnetic shielding and heat insulation effect between the high-voltage equipment and the low-voltage wire harness can be achieved, thereby preventing the electromagnetic interference generated by the confluence chamber 400 from interfering with the wire harness in the wiring chamber 500.

[0047] The partition 170 extends along the first direction, and can also be detachably connected to the cabinet 100, so as to facilitate the assembly and maintenance of the cabinet 100 as a whole. Exemplarily, the top of the partition 170 is connected to the lower crossbeam 160, and the bottom of the partition 170 is connected to the bottom carrier plate 120 of the cabinet 100, so that the partition 170 can isolate the wiring chamber 500 from the confluence chamber 400 to the maximum extent. In a specific implementation, the partition 170 can be connected to the crossbeam 160 and the bottom carrier plate 120 respectively by bolt connection, or the partition 170 can also be provided with a clamping structure, so as to be clamped with the crossbeam 160 and the bottom plate 3111 carrier respectively. Of course, the partition 170 can also be connected to the cabinet 100 in other ways, which is not limited in this embodiment.

[0048] For reference Figure 4 and Figure 5 , Figure 5 3 is a structural schematic diagram of the power distribution module 310 in the embodiment of the present application. The power distribution module 310 near the confluence chamber 400 may include a power distribution plug box 311, and the power distribution plug box 311 includes a bottom plate 3111 and a plurality of panels 3112, and the plurality of panels 3112 and the bottom plate 3111 are arranged to form a box structure with an opening at the top. The side of the bottom plate 3111 facing the top plate 110 of the cabinet 100 can be used to place the power distribution components 312, and because there is a structure of the bottom plate 3111 between the power distribution chamber 300 and the confluence chamber 400, the bottom plate 3111 can have the effect of isolating the power distribution chamber 300 from the confluence chamber 400. Specifically, the bottom plate 3111 can achieve the effect of electromagnetic shielding between the high-voltage equipment in the confluence chamber 400 and the low-voltage power distribution equipment in the power distribution chamber 300. At the same time, the bottom plate 3111 can also have a heat insulation effect to prevent the heat generated by the high-voltage equipment in the confluence chamber 400 from being excessively transferred to the power distribution chamber 300 when working.

[0049] As mentioned above, the power distribution room 300 may be provided with a plurality of power distribution modules 310. As an implementation scheme, each power distribution module 310 may be designed as a structure of a power distribution module 310 close to the confluence chamber 400, that is, each power distribution module 310 includes a power distribution plug box 311, each power distribution plug box 311 includes a bottom plate 3111 and a plurality of panels 3112, and power distribution components 312 may be arranged on the bottom plate 3111. The plurality of power distribution plug boxes 311 are arranged in sequence along the first direction, so that the structure of the plurality of power distribution plug boxes 311 can make each power distribution module 310 relatively independent and will not interfere with each other, and the bottom plate 3111 of each power distribution plug box 311 can also have a heat insulation effect on the adjacent power distribution modules 310.

[0050] Continue to refer Figure 5 A plurality of switch handles 3113 are provided on a panel 3112 on a side of the power distribution box 311 close to the cabinet door 130. The plurality of switch handles 3113 can be used to control the on and off of the circuits of the plurality of power distribution components 312 in the power distribution box 311. It can be understood that since the switch handles 3113 are provided at a position close to the cabinet door 130, the operator can control the on and off of the switch handles 3113 by opening the cabinet door 130, which improves the convenience of the operator's operation.

[0051] Furthermore, a plurality of pluggable interfaces 3114 may be provided on the panel 3112 on the side of the distribution box 311 facing the wiring room 500, and each pluggable interface 3114 is connected to the distribution components 312 inside the distribution box 311. The plurality of pluggable interfaces 3114 can be divided into pluggable interfaces 3114a for plugging in power cables and pluggable interfaces 3114b for plugging in communication cables. For example, the pluggable interfaces 3114a are all provided on the side of the panel 3112 close to the cabinet door 130, and the pluggable interfaces 3114b are all provided on the side of the panel 3112 close to the backplane 140, so that different cables can be plugged in with the distribution box 311 according to a certain rule. In this way, it is not only convenient to improve the assembly and wiring speed of the equipment and the wiring accuracy, and reduce the manual assembly cost, but the plug-in connection form is also convenient for assembly and maintenance.

[0052] Based on this, reference Figure 6 , Figure 6Schematic diagram of the structure of the wiring trough 510 in the embodiment of the present application. At least two wiring troughs 510 may be provided in the wiring room 500, wherein a part of the wiring troughs 510 is used to arrange the power line, and another part of the wiring troughs 510 is used to arrange the communication line. Taking the arrangement of two wiring troughs 510 in the wiring room 500 as an example, the two wiring troughs 510 may be arranged on the inner wall of the adjacent side panel 150, and the two wiring troughs 510 are arranged along the third direction, wherein the wiring trough 510a is used to arrange the power line, and the wiring trough 510b is used to arrange the communication line. Each wiring trough 510 extends to the bottom carrier plate 120 of the cabinet 100, so that each cable can pass through the bottom carrier plate 120 to connect with the equipment outside the cabinet 100.

[0053] In addition, since the surface of the panel 3112 of the power distribution box 311 is relatively flat, a device label can be attached to the panel 3112 to identify different structures. For example, the device label can identify the line controlled by each switch handle 3113, or can also identify the power distribution components 312 connected to different pluggable interfaces 3114, so that the operator can identify the switch handle 3113 and the pluggable interface 3114 on the panel 3112.

[0054] In some embodiments, each power distribution box 311 and the cabinet 100 may be connected in a push-pull structure. For example, a slide groove may be provided on the inner wall of the side panel 150 of the cabinet 100 away from the wiring room 500, and the slide groove extends along the third direction. A slide rail is provided on the panel 3112 of the power distribution box 311 on the side facing the slide rail. The slide rail and the slide groove are slidably matched to realize the movement of the power distribution box 311 relative to the cabinet 100 along the third direction. In this way, when the operator needs to check or maintain the components in the power distribution box 311, it only needs to pull a part of the power distribution box 311 out from the inside of the cabinet 100, which is convenient for operation. In addition, the power distribution box 311 may also be provided with a locking structure, so that when the power distribution box 311 is pushed and pulled to a certain position in the cabinet 100, it is relatively fixed with the cabinet 100 through the locking structure.

[0055] For reference Figure 4 and Figure 7 , Figure 7It is a partial structural schematic diagram of the confluence chamber 400 in the embodiment of the present application. A circuit breaker assembly 410, an input copper bar 420 and an output copper bar 430 are provided in the confluence chamber 400, and the circuit breaker assembly 410 has manual and automatic opening and closing functions to control the circuit on and off. One end of the input copper bar 420 is connected to the circuit breaker assembly 410, and the other end is connected to the equipment (such as a battery cluster) outside the cabinet 100. Similarly, one end of the output copper bar 430 is connected to the circuit breaker assembly 410, and the other end is connected to the equipment (such as an energy storage converter) outside the cabinet 100 to complete the circuit connection of the confluence chamber 400. The input copper bar 420 and the output copper bar 430 are at least one group. When multiple groups of input copper bars 420 and output copper bars 430 are set, multiple groups of input copper bars 420 and output copper bars 430 are arranged along the second direction, and in one group of copper bars, the input copper bar 420 and the output copper bar 430 are also arranged along the second direction. At the same time, each input copper bar 420 extends along the first direction, and each output copper bar 430 also extends along the first direction, that is, the input copper bar 420 and the output copper bar 430 are respectively arranged in the longitudinal direction. Therefore, in the depth direction (third direction) of the cabinet 100, only one copper bar is arranged, and there will be no front-to-back overlap, thereby effectively avoiding the problem of wiring interference.

[0056] In some embodiments, reference Figure 8 , Figure 8 4 is another structural schematic diagram of the confluence chamber 400 in the embodiment of the present application. The circuit breaker assembly 410 may include at least one molded case circuit breaker 411. When the number of molded case circuit breakers 411 is greater than or equal to 2, each molded case circuit breaker 411 is connected in parallel. For example, two adjacent molded case circuit breakers 411 can be connected in parallel through a horizontal copper busbar. In addition, each molded case circuit breaker 411 is connected to a group of input copper busbars 420 and output copper busbars 430. Figure 8 For example, two molded case circuit breakers 411 are arranged in the confluence chamber 400, and each molded case circuit breaker 411 is connected to an energy storage stack through an input copper bus 420, wherein each energy storage stack includes one or more battery clusters. It can be understood that when two molded case circuit breakers 411 are arranged, all battery clusters of the battery energy storage system can be divided into two small energy storage stacks, so that independent on-off control of the two energy storage stacks can be achieved. When one of the energy storage stacks fails, the circuit of the energy storage stack can be cut off separately for maintenance without affecting the normal operation of the other energy storage stack, thereby bringing a better user experience. In other words, when multiple molded case circuit breakers 411 are arranged, the battery clusters can be divided into a corresponding number of energy storage stacks, and the independent operation of each energy storage stack can be achieved. In addition, in this embodiment, by setting the molded case circuit breaker 411, the cost is low and the volume is small, which can facilitate the reduction of the cost of the circuit breaker assembly 410.

[0057] It should be noted that, in addition to the configuration of at least one molded case circuit breaker 411 included in the above-mentioned embodiment, in some other embodiments, the circuit breaker assembly 410 may also include at least one frame circuit breaker, and when the number of frame circuit breakers is greater than or equal to 2, each frame circuit breaker is connected in parallel. Moreover, each frame circuit breaker is connected to an energy storage stack through a set of input copper bars 420 and output copper bars 430. Alternatively, the circuit breaker assembly may also include at least one load switch, and when the number of load switches is greater than or equal to 2, each load switch is connected in parallel. Moreover, each load switch is connected to an energy storage stack through a set of input copper bars 420 and output copper bars 430.

[0058] In some embodiments, surge protectors (not shown in the figure) may be respectively provided in the junction chamber 400 and the distribution chamber 300. The surge protectors may protect the equipment in the junction chamber 400 and the distribution chamber 300 to prevent the equipment from being damaged by lightning strikes.

[0059] In some embodiments, reference Fig. 9 , Fig. 9 1 is a schematic diagram of the structure of the cabinet door 130 of the cabinet 100 in the embodiment of the present application. The cabinet door 130 in this embodiment may include an upper door 131 and a lower door 132, and the upper door 131 and the lower door 132 may be opened or closed respectively, and the dividing line between the upper door 131 and the lower door 132 may be consistent with the dividing line between the confluence chamber 400 and the power distribution chamber 300. That is, when the operator opens the upper door 131, the equipment in the power distribution chamber 300 can be operated, and when the operator opens the lower door 132, the equipment in the confluence chamber 400 can be operated.

[0060] The upper door 131 may be provided with a display control 1312, an indicator light 1311, an emergency stop button 1313 and other structures, so that the operator can control the on and off of the circuit in the power distribution room 300 according to the indications of the display control 1312, the indicator light 1311 and other indicators. The lower door 132 may be provided with an observation window 1321 and an air inlet mesh 1322, wherein the air inlet mesh 1322 is located near the bottom of the cabinet 100, and the air inlet mesh 1322 can facilitate the cold air outside the cabinet 100 to enter the cabinet 100, thereby dissipating heat for the equipment inside the cabinet 100.

[0061] For reference Figure 5 , Fig. 9 and Fig.10 , Fig.10 FIG. 6 is a schematic diagram of the structure of the heat dissipation channel 600 inside the cabinet 100 in the embodiment of the present application. Figure 5As shown, the bottom plate 3111 of each power distribution plug box 311 is provided with a mesh structure 3115 near the back plate 140 of the cabinet 100, and the mesh structures 3115 of each bottom plate 3111 can be arranged opposite to each other, and the mesh structures 3115 can facilitate the passage of gas. Since the top of each power distribution plug box 311 has an opening, the gas can pass through the mesh structures 3115 of each power distribution plug box 311 in sequence to ensure that the gas flows smoothly inside the cabinet 100. As mentioned above, the bottom of the lower door 132 is provided with an air inlet mesh 1322, and an air outlet can also be provided on the top plate 110 of the cabinet 100, and the air inlet mesh 1322, the confluence chamber 400, each mesh structure 3115, the uninterruptible power supply chamber 200 and the air outlet are connected in sequence to form a heat dissipation channel 600. Fig.10 The arrow in the figure can be understood as the flow direction of the gas. In this embodiment, a fan 180 can be set at the air outlet. When the cold air enters the cabinet 100 through the air inlet mesh 1322, under the suction effect of the fan 180, the cold air can pass through the copper busbar in the confluence chamber 400, the mesh structure 3115 of each power distribution plug box 311, and the rear air duct of the uninterruptible power supply chamber 200 in sequence, and then be discharged from the cabinet 100 through the air outlet. Therefore, when the cold air circulates in the cabinet 100, it can pass through as many heat-generating devices as possible from bottom to top, which can help improve the heat dissipation effect inside the cabinet 100 and prevent the equipment in the cabinet 100 from overheating and causing failure or burning.

[0062] When the mesh structure 3115 is provided on the bottom plate 3111 of the power distribution plug box 311, along the third direction, the mesh structure 3115 can occupy one-third of the space of the bottom plate 3111, and the remaining two-thirds of the space can be used to place the power distribution components 312, which can not only improve the space utilization rate in the power distribution plug box 311, but also achieve a good heat dissipation effect. It should be understood that the space occupied by the mesh structure 3115 in this embodiment is only an example. In actual application, the space occupied by the mesh structure 3115 and the power distribution components 312 can be adjusted according to needs.

[0063] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An energy storage combined combiner cabinet, characterized in that: The cabinet comprises a housing space inside which is provided with an uninterruptible power supply room, a power distribution room, a confluence room and a wiring room; The uninterruptible power supply room, the power distribution room and the confluence room are arranged along a first direction, the first direction being the arrangement direction between the top and the bottom of the cabinet, the uninterruptible power supply room is arranged close to the top of the cabinet, and the confluence room is arranged close to the bottom of the cabinet; The wiring chamber is located at the side of the power distribution chamber and the confluence chamber, the wiring chamber and the power distribution chamber are arranged along the second direction, and the wiring chamber extends along the first direction; The power distribution room includes a plurality of power distribution modules, the power distribution module close to the confluence room includes a power distribution plug-in box, a bottom plate is provided on the side of the power distribution plug-in box facing the confluence room, and a side of the bottom plate facing away from the confluence room is used for placing power distribution components; A partition is provided between the confluence chamber and the wiring chamber.

2. The energy storage combined combiner cabinet according to claim 1 is characterized in that: Each of the power distribution modules comprises a power distribution plug-in box, and each of the power distribution plug-in boxes is arranged along the first direction; Each of the power distribution plug-in boxes comprises the bottom plate and a plurality of panels, and the plurality of panels and the bottom plate are arranged to form a box structure of the power distribution plug-in box.

3. The energy storage combined cabinet according to claim 2 is characterized in that: The cabinet is provided with cabinet doors and a back plate which are arranged opposite to each other, and a mesh structure is provided at a position of each bottom plate close to the back plate.

4. The energy storage combined cabinet according to claim 3 is characterized in that: An air inlet mesh is provided at a portion of the cabinet door near the bottom of the cabinet, and an air outlet is provided at the top of the cabinet. The air inlet mesh, the confluence chamber, each mesh structure, the uninterruptible power supply chamber and the air outlet are connected in sequence to form a heat dissipation channel.

5. The energy storage combined cabinet according to claim 3 is characterized in that: Each of the power distribution boxes is provided with a plurality of switch handles on the panel facing the cabinet door.

6. The energy storage combined cabinet according to claim 2, characterized in that: A panel of each power distribution plug box facing the wiring room is provided with a plurality of pluggable interfaces, and the pluggable interfaces are used to connect with cables in the wiring room.

7. The energy storage combined cabinet according to claim 6, characterized in that: At least two wiring troughs are arranged in the wiring room, a part of the wiring troughs are used for arranging power lines, and another part of the wiring troughs are used for arranging communication lines.

8. The energy storage combined cabinet according to claim 2, characterized in that: The panel of each power distribution plug box is provided with a device label.

9. The energy storage combined combiner cabinet according to claim 1, characterized in that: The confluence chamber is provided with a circuit breaker assembly, an input copper bar and an output copper bar, and the input copper bar and the output copper bar are both connected to the circuit breaker assembly; The input copper bar and the output copper bar are arranged along the second direction, and the input copper bar and the output copper bar extend along the first direction respectively.

10. The energy storage combined combiner cabinet according to claim 9, characterized in that: The circuit breaker assembly includes at least one frame circuit breaker, each of which is connected to an energy storage stack through a pair of input copper bars and output copper bars; or The circuit breaker assembly includes at least one molded case circuit breaker, each of which is connected to an energy storage stack via a pair of the input copper bar and the output copper bar; or The circuit breaker assembly includes at least one load switch, and each of the load switches is connected to an energy storage stack through a pair of the input copper busbar and the output copper busbar.

11. The energy storage combined combiner cabinet according to claim 1, characterized in that: The confluence chamber and the power distribution chamber are both provided with surge protectors.

12. The energy storage combined combiner cabinet according to claim 1, characterized in that: The partition plate is detachably connected to the cabinet.

13. A battery energy storage system, characterized in that: It comprises the energy storage combined junction cabinet as described in any one of claims 1 to 12.

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