Energy storage busbar cabinet structure

Abstract

The application discloses a kind of energy storage busbar structure, including cabinet, UPS host, backup battery group, heater and at least one busbar fuse, the UPS host, the backup battery group, the heater and the busbar fuse are all arranged in the cabinet;The UPS host is arranged above the backup battery group, and the UPS host is close to the top of the cabinet setting;The heater is arranged on one side of the backup battery group;The busbar fuse is arranged below the backup battery group, and the busbar fuse is connected with busbar copper row;The backup battery group includes multiple battery units arranged from top to bottom, and the battery unit is connected with the UPS host.This application uses modularization setting, has the functions such as busbar, protection and heat preservation, high safety, strong environmental adaptability, and convenient operation and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to an energy storage combiner cabinet structure. Background Technology

[0002] Currently, in the field of large-scale energy storage, 5MWh containers are mostly standard 20-foot containers, which include space layouts such as battery compartment, liquid cooling compartment, and electrical compartment. Among them, the battery compartment occupies the main space and is used to house battery clusters; the liquid cooling compartment contains liquid cooling units and usually needs to adopt an open or semi-open design to ensure heat dissipation; the electrical compartment is mainly used for the placement of combiner cabinets, power distribution units, monitoring systems, and fire-fighting equipment, and the space is extremely limited.

[0003] In existing energy storage projects, DC combiner cabinets generally adopt the following structure: (1) Each battery cluster is connected to the combiner cabinet via a cable; (2) Each circuit is equipped with a DC fuse to achieve basic short-circuit protection; (3) All branches are connected to copper busbars (or bus troughs); (4) Circuit breakers or disconnect switches are installed on the outlet side; (5) The combiner cabinet structure is a metal enclosed cabinet with a bottom cable trough or a top outlet.

[0004] The main problems with the existing combiner cabinet structure include:

[0005] (1) Large space occupation and difficulty in high integration: Traditional combiner cabinets adopt a separate design (such as separate arrangement of fuses, contactors and copper busbars), resulting in a large size and encroaching on the electrical compartment space. The DC combiner cabinet of a certain manufacturer has a size of 800×600×2000mm. The power distribution and combiner are integrated into one cabinet. After use, fire-fighting agent cylinders need to be placed separately, which exceeds the standard 20-foot container size and cannot meet the high-density requirements.

[0006] (2) Insufficient safety protection: Many combiner cabinets are designed to only meet the electrical connection function, ignoring the impact of potential surge voltage, lightning, electric arc, etc. Especially when deployed outdoors or in complex electromagnetic environments, equipment failure, system restart, and even electric shock and fire accidents are likely to occur.

[0007] (3) Lack of backup power supply: Most combiner cabinets do not integrate UPS system or backup power supply. When the main power fails or is passively cut off, the monitoring system, battery management system (BMS) or communication module will immediately lose power, resulting in data loss, system chaos, or even inability to operate normally, posing a safety hazard.

[0008] (4) Complex operation and maintenance and cabling: The cabling is not standardized in cabinet placement, layout and subsequent maintenance. Some combiner cabinets have redundant structures and complex internal wiring. The operating space for maintenance personnel is limited, making repair and replacement inconvenient and increasing labor costs and downtime.

[0009] (5) Weak environmental adaptability: Especially in cold regions, low temperature environment can cause condensation inside the equipment, which can lead to short circuit or electric shock risk; and most existing combiner cabinets are not equipped with temperature control or heating devices, which cannot guarantee stable operation.

[0010] (6) Low modularity: Most products on the market do not have a unified standard structure, which is not conducive to containerized deployment and transportation installation, and does not conform to the current development direction of "turnkey projects" or "standardized integrated modules". Utility Model Content

[0011] This utility model provides an energy storage combiner cabinet structure, which aims to solve the problems that existing combiner cabinet structures cannot integrate "combination, isolation, protection, backup and temperature control" and cannot meet the development needs of large-scale energy storage systems.

[0012] To address the aforementioned technical problems, this utility model provides an energy storage combiner cabinet structure, including a cabinet, a UPS main unit, a backup battery pack, a heater, and at least one busbar fuse. The UPS main unit, the backup battery pack, the heater, and the busbar fuse are all housed within the cabinet. The UPS main unit is positioned above the backup battery pack and near the top of the cabinet. The heater is located on one side of the backup battery pack. The busbar fuse is positioned below the backup battery pack and is connected to a busbar. The backup battery pack includes multiple battery cells arranged from top to bottom, and each battery cell is connected to the UPS main unit.

[0013] In a preferred embodiment, the busbar is connected to the inlet terminal of the battery cluster in the container; the end of the busbar away from the busbar is connected to the load (i.e., the output terminal) or an isolation device; the isolation device is an isolating switch.

[0014] In a preferred embodiment, the bottom of the cabinet is provided with an open opening; the busbar is connected to the load via an output cable; the output cable is output to the load through the open opening.

[0015] In a preferred embodiment, the isolating switch is connected to the main output port; the isolating switch is a switch with isolation function, hot-swappable function and operation feedback function.

[0016] In a preferred embodiment, two sets of disconnecting switches are provided, and the two sets of disconnecting switches are set independently of each other; two bus fuses are provided, and the two bus fuses are set independently of each other; the disconnecting switches and the bus fuses are set in a one-to-one correspondence.

[0017] In a preferred embodiment, the top of the cabinet is provided with an auxiliary cable outlet, and a sealing ring is provided around the edge of the auxiliary cable outlet, with an insulating sleeve fitted on the outside of the sealing ring.

[0018] In a preferred embodiment, a protector fuse and a protector are provided below the heater, and the protector fuse and the protector are arranged adjacent to each other.

[0019] In a preferred embodiment, the protector is connected to two protector fuses respectively; the two protector fuses are connected to the busbar respectively; the negative terminal of the protector is connected to the grounding busbar; and the grounding busbar is connected to the system grounding grid through the cabinet.

[0020] In a preferred embodiment, one of the protector fuses is connected to the positive terminal of the protector, and the other protector fuse is connected to the negative terminal of the protector; the protector fuse connected to the positive terminal of the protector is connected to the bus fuse.

[0021] In a preferred embodiment, two protectors are provided, and the two protectors are set independently of each other; each protector is set in a one-to-one correspondence with the bus fuse.

[0022] In a preferred embodiment, the protector is equipped with a fault indication and remote alarm module; the heater, the protector fuse, and the protector are all fixed to the cabinet by a fixing bracket.

[0023] In a preferred embodiment, the protector fuse is a DC surge protector fuse, and the protector is a DC surge protector.

[0024] In a preferred embodiment, the heater is connected to a temperature control switch; when the temperature inside the cabinet is below 5°C, the heater starts working; when the temperature inside the cabinet is above 25°C, the temperature control switch automatically disconnects.

[0025] In a preferred embodiment, the UPS host is an industrial-grade DC UPS host with automatic power switching function; the backup battery pack is a backup battery pack with a power supply time of ≥2h.

[0026] In a preferred embodiment, the backup battery pack is a 72V, 20Ah battery pack; the backup battery pack is a lead-acid battery module; the battery cells are connected in series or in parallel.

[0027] In a preferred embodiment, the outer surface of the cabinet is provided with an anti-corrosion coating; and the bottom of the cabinet is provided with forklift holes on both sides that are compatible with forklifts.

[0028] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0029] (1) The structure of this application not only has basic functions such as current collection, protection and output, but also integrates auxiliary functions such as surge suppression, UPS power supply, heating and insulation and grounding system. It is comprehensive in function and can realize "one cabinet with multiple functions", which greatly simplifies the layout of the power distribution system.

[0030] (2) The structure of this application adopts a multi-branch independent protection setting, with an independent bus fuse in each branch, which can realize branch-level rapid fault isolation and clearing; a double disconnect switch is set at the output end to ensure maintenance safety; the electrical anti-interference capability is enhanced by setting up surge protection modules (i.e., protector fuse and protector); the grounding system is complete, which improves the overall cabinet's anti-electric shock capability; the UPS provides power failure protection to prevent risks such as fire caused by the failure of critical equipment (such as fire protection, BMS, etc.) to work, and the system has high safety.

[0031] (3) The structure of this application adopts a modular and standardized setting. All components are laid out according to standard modules and have unified interfaces, which facilitates rapid deployment, assembly, debugging and replacement. It can support the application requirements of different voltage levels (e.g. 750VDC / 1000VDC / 1500VDC).

[0032] (4) The structure of this application adopts an industrial-grade heater, with an internal ventilation channel, and can be equipped with a temperature and humidity sensor. The cabinet is enclosed and adaptable to outdoor, high-altitude and high-humidity areas, with strong environmental adaptability.

[0033] (5) Each branch of the structure in this application is equipped with an identification and monitoring port, and its status can be remotely monitored through the communication system. All devices are modular and detachable, which facilitates quick maintenance and convenient operation and maintenance. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of an energy storage combiner cabinet according to an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A schematic diagram of the internal structure of the energy storage combiner cabinet;

[0037] Figure 3 for Figure 1 A schematic diagram of the internal structure of the energy storage combiner cabinet from another angle;

[0038] Figure 4 for Figure 1 A schematic diagram of the internal structure of the energy storage combiner cabinet from another angle;

[0039] Figure 5 for Figure 1 Electrical schematic diagram of the energy storage combiner cabinet structure.

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] Specifically, such as Figures 1 to 4 As shown, this utility model embodiment provides an energy storage combiner cabinet structure, including a cabinet 10, a UPS main unit 20, a backup battery pack 30, a heater 40, and at least one busbar fuse FU. The UPS main unit 20, the backup battery pack 30, the heater 40, and the busbar fuse FU are all disposed within the cabinet 10. The UPS main unit 20 is disposed above the backup battery pack 30, and the UPS main unit 20 is disposed near the top of the cabinet 10. The heater 40 is disposed on one side of the backup battery pack 30. The busbar fuse FU is disposed below the backup battery pack 30, and the busbar fuse FU is connected to a busbar copper bus 50. The backup battery pack 30 includes a plurality of battery units 31 arranged from top to bottom, and the battery units 31 are connected to the UPS main unit 20.

[0044] In this application's structure, a multi-branch independent protection setting is adopted, with an independent bus fuse in each branch, enabling rapid fault isolation at the branch level and effectively preventing a single branch fault from affecting the entire container system. This application's structure not only has basic functions such as busing, protection, and output, but also integrates auxiliary functions such as surge suppression, UPS power supply, heating and insulation, and grounding systems, making it comprehensively functional.

[0045] In a preferred embodiment, the busbar fuse FU is connected to the inlet terminal of the battery cluster of the container (not shown in the figure); the end of the busbar 50 away from the busbar fuse FU is connected to the load (i.e., the output terminal, not shown in the figure) or the isolation device QS; the isolation device QS is an isolating switch.

[0046] In a preferred embodiment, the bottom of the cabinet 10 is provided with an open opening 11; the busbar 50 is connected to the load through an output cable 60; the output cable 60 is output to the load (e.g., a container cable output port, which is connected to external PCS or other equipment to achieve energy transmission) through the open opening 11.

[0047] In a preferred embodiment, the isolating switch is connected to the main output port; the isolating switch is a switch with isolation function, hot-swappable function, and operation feedback function. By setting up the isolating switch, the main circuit can be disconnected for convenient maintenance; branch circuits can be replaced online; and it can also be connected to a monitoring system to provide location signals.

[0048] As a preferred embodiment, such as Figure 5 As shown, there are two sets of disconnecting switches QS, and the two sets of disconnecting switches (marked as QS1 and QS2 respectively) are set independently; there are two bus fuses FU, and the two bus fuses (marked as FU1 and FU2 respectively) are set independently; the disconnecting switches QS and the bus fuses FU are set in a one-to-one correspondence.

[0049] This application's structure features a double isolating switch at the output end to ensure maintenance safety. It includes manual or electric operation mechanisms, supports hot-switching and live system maintenance, and supports isolation and status monitoring, improving the equipment's safety factor and operational flexibility. The structure also incorporates two bus fuses, FU1 and FU2. The input terminal (typically the positive input terminal) of one half of the battery pack in the container is connected to bus fuse FU1, while the input terminal (typically the positive input terminal) of the other half of the battery pack is connected to bus fuse FU2. Even if one of the bus fuses FU fails, the normal operation of the combiner cabinet can still be guaranteed.

[0050] In a preferred embodiment, the top of the cabinet 10 is provided with an auxiliary cable outlet 12. A sealing ring (not shown in the figure) is circumferentially arranged around the edge of the auxiliary cable outlet 12, and an insulating sleeve (not shown in the figure) is fitted over the outer side of the sealing ring. UPS input / output auxiliary cables extend to the input end of the power distribution monitoring cabinet through the auxiliary cable outlet; the sealing ring and high-temperature resistant insulating sleeve at the outlet ensure a protection level of IP20 or higher.

[0051] In this application, the busbar 50 collects the current from various circuits, meeting the operating requirement of a maximum DC current of 3000A for a single cabinet. The busbar 50 is fixed to the cabinet by an insulating bracket, ensuring the mechanical strength and electrical insulation of the busbar. Unless otherwise specified, the arrangement and installation connection of the busbar adopt conventional installation connection methods.

[0052] In a preferred embodiment, a protector fuse FU10 and a protector SPD are disposed below the heater 40, with the protector fuse FU10 and the protector SPD disposed adjacent to each other.

[0053] In a preferred embodiment, the protector SPD is connected to two protector fuses (marked as FU11 and FU12); the two protector fuses FU11 and FU12 are connected to the busbar 50; the negative terminal of the protector SPD is connected to the grounding busbar 70; and the grounding busbar 70 is connected to the system grounding grid through the cabinet 10.

[0054] In a preferred embodiment, one of the protector fuses FU11 is connected to the positive terminal of the protector SPD, and the other protector fuse FU12 is connected to the negative terminal of the protector SPD; the protector fuse FU11 connected to the positive terminal of the protector SPD is connected to the bus fuse FU1.

[0055] In a preferred embodiment, two SPDs are provided, and the two SPDs (labeled SPD1 and SPD2) are set independently of each other; the SPDs are set in a one-to-one correspondence with the bus fuses FU.

[0056] Protectors SPD1 and SPD2 have the same connection structure; for example, protector SPD2 is connected to two protector fuses (labeled FU21 and FU22); the two protector fuses FU21 and FU22 are connected to the busbar 50; the negative terminal of protector SPD2 is connected to the grounding busbar 70; the grounding busbar 70 is connected to the system grounding grid through the cabinet 10. In this application, the grounding busbar 70 is configured in a one-to-one correspondence with the protector, that is, there are two grounding busbars 70, one of which is connected to protector SPD1, and the other is connected to protector SPD2. One protector fuse FU21 is connected to the positive terminal of protector SPD2, and the other protector fuse FU22 is connected to the negative terminal of protector SPD2; the protector fuse FU21 connected to the positive terminal of protector SPD2 is connected to the busbar fuse FU2.

[0057] The system enhances electrical interference immunity by incorporating surge protection modules (i.e., protectors, fuses, and protectors); the complete grounding system improves the overall cabinet's protection against electric shock; the UPS provides power outage protection to prevent risks such as fires caused by the failure of critical equipment (e.g., fire protection, BMS, etc.), resulting in high system safety.

[0058] In a preferred embodiment, the SPD protector is equipped with a fault indication and remote alarm module (not shown in the figure); the heater 40, the protector fuse FU10, and the protector SPD are all fixed inside the cabinet 10 by a fixing bracket (not shown in the figure). This facilitates the installation, disassembly, and replacement of each component.

[0059] In this application, by setting the protector fuse FU10 and the corresponding protector SPD, 10 / 350μs lightning surges or 8 / 20μs surges can be effectively suppressed. Moreover, this application sets a protector fuse and a protector before the output of the busbar of each branch, forming a visible and replaceable protection module, which enhances the ability to resist lightning strikes and arc interference, and can realize branch-level rapid fault isolation, effectively preventing a single branch fault from affecting the entire container system.

[0060] In a preferred embodiment, the protector fuse FU10 is a DC surge protector fuse, and the protector SPD is a DC surge protector.

[0061] In a preferred embodiment, the heater 40 is connected to a temperature control switch (not shown in the figure). When the temperature inside the cabinet 10 is below 5°C, the heater 40 starts working; when the temperature inside the cabinet 10 is above 25°C, the temperature control switch automatically disconnects. Automatic control of the heater via the temperature control switch ensures that the electrical equipment inside the cabinet operates within a stable temperature range, preventing condensation, frost, or electrical failure, and providing over-temperature protection. This ensures stable system operation even in low-temperature or high-humidity environments, making it particularly suitable for scenarios in northern, high-altitude, and coastal areas. The heater in this application is generally powered by mains electricity. When mains power is interrupted, a backup battery pack can power the heater to ensure its normal operation.

[0062] In a preferred embodiment, the UPS host 20 is an industrial-grade DC UPS host with automatic power switching function; the backup battery pack 30 is a backup battery pack with a power supply time of ≥2 hours. It employs an industrial-grade heater, has internal ventilation channels, and can be optionally equipped with temperature and humidity sensors. The fully enclosed cabinet design makes it suitable for outdoor, high-altitude, and high-humidity deployments, demonstrating strong environmental adaptability.

[0063] In a preferred embodiment, the backup battery pack 30 is a 72V, 20Ah battery pack; the backup battery pack 30 is a lead-acid battery module; the battery cells 31 are connected in series or parallel. When the UPS system loses power, the backup battery pack and the UPS main unit can provide backup power for no less than 2 hours to power the controller, communication module, alarm, heater, etc., stabilizing the output voltage and ensuring the continuity of system data and operation.

[0064] In a preferred embodiment, the outer surface of the cabinet 10 is provided with an anti-corrosion coating (not shown in the figure); both sides of the bottom of the cabinet 10 are provided with forklift holes 13 adapted to forklifts. The forklift holes 13 facilitate loading and unloading of the manifold cabinet by forklift; the surface of the cabinet is coated with an anti-corrosion coating, making the manifold cabinet suitable for harsh environments such as coastal areas, plateaus, and extreme cold; the cabinet of this application meets the IP20 protection standard and can be equipped with IP54 dustproof and rainproof measures, which facilitates transportation, installation and loading and unloading with standard 20-foot energy storage containers.

[0065] This application adopts a modular and standardized structure. All components are laid out in standard modules with unified interfaces, facilitating rapid deployment, assembly, debugging, and replacement. It can support application requirements of different voltage levels (e.g., 750VDC / 1000VDC / 1500VDC). All devices are modular and detachable, facilitating rapid maintenance and convenient operation and maintenance.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy storage combiner cabinet structure, characterized in that, The system includes a cabinet, a UPS main unit, a backup battery pack, a heater, and at least one busbar fuse. The UPS main unit, the backup battery pack, the heater, and the busbar fuse are all housed within the cabinet. The UPS main unit is positioned above the backup battery pack and is located near the top of the cabinet. The heater is positioned to one side of the backup battery pack. The busbar fuse is positioned below the backup battery pack and is connected to a busbar. The backup battery pack includes multiple battery cells arranged from top to bottom, and each battery cell is connected to the UPS main unit.

2. The energy storage combiner cabinet structure according to claim 1, characterized in that, The busbar fuse is connected to the inlet terminal of the battery cluster in the container; the end of the busbar away from the busbar fuse is connected to the load or isolation device; the isolation device is an isolating switch.

3. The energy storage combiner cabinet structure according to claim 2, characterized in that, The bottom of the cabinet is provided with an open opening; the busbar is connected to the load through an output cable; the output cable is output to the load through the open opening.

4. The energy storage combiner cabinet structure according to claim 2, characterized in that, The isolating switch is connected to the main output port; the isolating switch is a switch with isolation function, hot-swappable function and operation feedback function; there are two sets of isolating switches, and the two sets of isolating switches are set independently; there are two bus fuses, and the two bus fuses are set independently; the isolating switch and the bus fuse are set in a one-to-one correspondence.

5. The energy storage combiner cabinet structure according to claim 1, characterized in that, The top of the cabinet is provided with an auxiliary cable outlet, and a sealing ring is provided around the edge of the auxiliary cable outlet. An insulating sleeve is fitted on the outside of the sealing ring.

6. The energy storage combiner cabinet structure according to claim 1, characterized in that, Below the heater, there is a protective fuse and a protector, which are arranged adjacent to each other. The protector is connected to two protector fuses respectively; the two protector fuses are connected to the busbar respectively; the negative terminal of the protector is connected to the grounding busbar; the grounding busbar is connected to the system grounding grid through the cabinet.

7. The energy storage combiner cabinet structure according to claim 6, characterized in that, One of the protector fuses is connected to the positive terminal of the protector, and the other protector fuse is connected to the negative terminal of the protector; the protector fuse connected to the positive terminal of the protector is connected to the bus fuse; Two protectors are provided, and the two protectors are set independently of each other; each protector is set in a one-to-one correspondence with the bus fuse. The protector is equipped with a fault indication and remote alarm module; the heater, the protector fuse, and the protector are all fixed to the cabinet by a fixing bracket; the protector fuse is a DC surge protector fuse, and the protector is a DC surge protector.

8. The energy storage combiner cabinet structure according to claim 1, characterized in that, The heater is connected to a temperature control switch; when the temperature inside the cabinet is below 5°C, the heater starts working; when the temperature inside the cabinet is above 25°C, the temperature control switch automatically disconnects.

9. The energy storage combiner cabinet structure according to claim 1, characterized in that, The UPS host is an industrial-grade DC UPS host with automatic power switching function; the backup battery pack is a backup battery pack with a power supply time of ≥2h.

10. The energy storage combiner cabinet structure according to claim 1, characterized in that, The backup battery pack is a 72V, 20Ah battery pack; the backup battery pack is a lead-acid battery module; the battery cells are connected in series or in parallel; The outer surface of the cabinet is coated with an anti-corrosion coating; the bottom of the cabinet is provided with forklift holes on both sides.

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