Liquid cooling container of high-voltage direct-hanging energy storage system

Abstract

The utility model discloses a liquid cooling container for a high-voltage direct-hanging energy storage system, which belongs to the technical field of energy storage and comprises a water cooling unit, an electrical cabin and an integrated converter cabin which are integrally formed. A battery support, a battery PACK and an integrated power unit are arranged in the integrated converter cabin, the battery support comprises an upper layer, a middle layer and a lower layer, the battery PACK is arranged on the upper layer and the lower layer of the battery support, the integrated power unit is arranged on the middle layer of the battery support, and the integrated power unit is composed of a PCS module and a high-voltage box. According to the utility model, the problem that the DC arc discharge risk is easily generated due to the subdivision arrangement of the existing container battery cluster and the PCS can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and in particular relates to a liquid-cooled container of a high-pressure direct-mounted energy storage system. Background Art

[0002] High-voltage direct-mounted energy storage systems, with their advantages of large single-unit capacity, high system efficiency, and small footprint, have great development potential in large-capacity energy storage application scenarios, such as those on the power supply side and the grid side. Existing containers for high-voltage direct-mounted energy storage systems have the following problems: ① The containers have a low degree of standardization; ② The containers use traditional air-cooled or liquid-cooled radiators as cooling devices, without detailed management of dual liquid cooling for the PCS and PACK; ③ The battery cluster and PCS are arranged in separate compartments within the container, with DC power output, which is prone to DC arcing risks and occupies a large area; ④ The PCS and high-voltage box are designed in separate compartments, resulting in low transmission efficiency between the PCS and BMS, and a low degree of container standardization. As an important development direction for large-scale storage application scenarios, such as those on the power supply side and the grid side, improving the operational reliability of high-voltage direct-mounted energy storage systems and optimizing their structural layout are of great practical significance to the development of large-scale energy storage technology. Utility Model Content

[0003] The purpose of the utility model is to provide a high-voltage direct-mounted energy storage system liquid-cooled container to solve the problem that the existing container battery cluster and PCS compartment layout are prone to the risk of DC arcing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-voltage direct-mounted energy storage system liquid-cooled container, comprising: a water-cooled unit, an electrical compartment, and an integrated converter compartment, wherein the water-cooled unit, the electrical compartment, and the integrated converter compartment are integrally formed;

[0006] A battery holder, a battery pack and an integrated power unit are arranged in the integrated converter cabin. The battery holder includes an upper layer, a middle layer and a lower layer. The battery pack is arranged in the upper and lower layers of the battery holder. The integrated power unit is arranged in the middle layer of the battery holder. The integrated power unit consists of a PCS module and a high-voltage box.

[0007] In some embodiments, an insulating support seat is provided at the bottom of the battery holder.

[0008] In some embodiments, a liquid cooling unit and a control cabinet are installed in the water cooling unit and the electrical compartment. The liquid cooling unit is a dual liquid cooling unit. When in use, one group of liquid cooling units dissipates heat for the battery PACK, and the other group of liquid cooling units dissipates heat for the integrated power unit.

[0009] In some embodiments, the integrated converter cabin further includes a cooling pipeline connected to a liquid cooling unit.

[0010] In some embodiments, the cooling pipeline includes a primary pipeline, a secondary pipeline, and a tertiary pipeline;

[0011] The primary pipeline is connected from the liquid cooling unit to the bottom of the integrated converter cabin;

[0012] The secondary pipeline is connected to the primary pipeline and is connected from the upper layer of the battery bracket to the bottom of the battery bracket, and is also connected from the upper layer of the battery bracket to the integrated power unit;

[0013] The tertiary pipeline is in communication with the secondary pipeline and is connected to the battery PACK and the integrated power unit.

[0014] In some embodiments, a vacuum bypass switch is provided on the AC side of the integrated power unit, and a DC circuit breaker is provided on the DC side.

[0015] In some embodiments, a fire extinguisher cabinet is installed in the water cooling unit and the electrical compartment.

[0016] In some embodiments, a cable trench is provided at the bottom of the integrated converter cabin.

[0017] In some embodiments, the integrated converter cabin is provided with a single-side double door along the length direction of the liquid-cooled container, and the water-cooled unit and the electrical cabin are provided with end double doors along the width direction of the liquid-cooled container.

[0018] In some embodiments, multiple battery holders are provided, and three battery packs are provided on the upper and lower layers of each battery holder respectively, and two integrated power units are provided on the middle layer of the battery holder. The three battery packs on the upper layer and the one integrated power unit on the middle layer constitute a set of energy storage units, and the three battery packs on the lower layer and the other integrated power unit on the middle layer constitute another set of energy storage units.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a liquid-cooled container for a high-voltage direct-mounted energy storage system, wherein a battery holder, a battery PACK and an integrated power unit are arranged in the integrated converter cabin. The battery holder includes an upper layer, a middle layer and a lower layer. The battery PACK is arranged in the upper and lower layers of the battery holder, and the integrated power unit is arranged in the middle layer of the battery holder. The integrated power unit is composed of a PCS module and a high-voltage box. The structure adopts an AC / DC integrated design. The battery unit and the PCS are placed together in the container, and the DC does not leave the box, thereby reducing stray inductance and parasitic capacitance, reducing the risk of DC arcing, short circuit and lightning strike, and further improving the system integration, power density and modularity. The present invention places the integrated power unit in the middle of the battery holder to facilitate the connection and wiring of the upper and lower battery clusters and the corresponding PCS. In addition, the integrated power unit of the present invention adopts an integrated design of PCS and high-voltage box, which saves the internal space of the integrated converter cabin, realizes rapid data interaction and control between PCS and BMS, improves control efficiency and reduces safety risks.

[0021] Furthermore, the integrated converter cabin of the utility model is provided with a single-side double door along the length direction of the liquid-cooled container, the water-cooled unit and the electrical cabin are provided with end double doors along the width direction of the liquid-cooled container, and a cable trench is provided at the bottom of the integrated converter cabin. Wiring is carried out through the cable trench, so that the energy storage systems can be arranged back to back and shoulder to shoulder, saving plant and station land.

[0022] Furthermore, a vacuum bypass switch is provided on the AC side of the integrated power unit of the present invention, and a DC circuit breaker is provided on the DC side, so as to realize online automatic bypass and online automatic redundancy in case of fault, realize fault isolation, and realize reliable disconnection on the DC side.

[0023] Furthermore, the present invention incorporates a dual-liquid cooling system and control cabinet within the water-cooled unit and electrical compartment. During operation, one cooling system dissipates heat for the battery pack, while the other cools the integrated power unit. This dual-liquid cooling design for the PCS and pack optimizes heat dissipation and enables refined heat dissipation management. The water output can be intelligently adjusted based on the temperature of the pack and PCS, improving heat dissipation efficiency and reliability for the PCS and batteries.

[0024] Furthermore, the present invention employs multiple battery racks, each with three battery packs on the upper and lower layers, and two integrated power units in the middle layer. The three battery packs on the upper layer and the one integrated power unit in the middle layer constitute one set of energy storage units, while the three battery packs on the lower layer and the other integrated power unit in the middle layer constitute another set of energy storage units. This design improves the standardization of battery containers and allows for flexible integration of 11 or 12 sets of energy storage units, adapting to different specifications of high-voltage direct-mounted energy storage systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an outline diagram of a liquid-cooled container for a high-voltage direct-mounted energy storage system provided in Example 1;

[0026] Figure 2 This is a front view of a liquid-cooled container for a high-pressure direct-mounted energy storage system provided in Example 1;

[0027] Figure 3 A top view of a liquid-cooled container of a high-pressure direct-mounted energy storage system provided in Example 1;

[0028] In the figure, 1. Water-cooled unit and electrical compartment; 2. Integrated converter compartment; 3. Double doors at the end; 4. Double doors on one side; 5. Primary pipeline; 6. Secondary pipeline; 7. Tertiary pipeline; 8. Battery bracket; 9. Battery PACK; 10. Integrated power unit; 11. Insulation support base; 12. Liquid-cooled unit; 13. Fire cabinet; 14. Control cabinet. DETAILED DESCRIPTION

[0029] Hereinafter, only certain exemplary embodiments are briefly described, and the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative rather than restrictive in nature.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "install," "connect," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] This embodiment provides a high-pressure direct-mounted energy storage system liquid-cooled container, such as Figure 1 As shown, the container is divided into two parts along its length: an integrated converter compartment 2 and a physically isolated water-cooled unit and electrical compartment 1. The integrated converter compartment 2 has a door on one side, including three single-sided double doors 4. The liquid-cooled unit and electrical compartment 1 are equipped with double doors 3 at the ends along the width of the container. The liquid-cooled energy storage container is 20 feet in size.

[0036] like Figure 2 and Figure 3 As shown, the interior of the integrated converter cabin 2 of the liquid-cooled energy storage container consists of a battery rack 8, a battery pack 9, an integrated power unit 10, a liquid cooling unit 12, a fire extinguisher cabinet 13, and a control cabinet 14. The liquid-cooled energy storage container contains 12 sets of energy storage units, with two sets arranged one above the other on the battery rack 8. Each set of energy storage units consists of three 1P104S large battery packs 9 and an integrated power unit 10. In other words, each row of battery racks 8 within the integrated converter cabin 2 has seven layers. The upper and lower layers are used to install battery packs 9, totaling 36 battery packs 9; the middle layer is used to install integrated power units 10, totaling 12 integrated power units 10. Below the battery rack 8 is an insulating support 11. The container control lines are connected to the water-cooled unit and electrical compartment 1 through a cable trench at the bottom of the integrated converter cabin 2. Sealing components are designed for the water-cooled unit, electrical compartment 1, and integrated converter cabin 2. The liquid-cooled energy storage container houses a liquid cooling unit 12 and a control cabinet 14 (including auxiliary power supply components) at the water-cooled unit and electrical compartment 1 end. The other end of the container, along its length, houses the AC input and output terminals. External power and control cables are routed through the cable trench at the bottom of the integrated converter compartment 2. No components are placed at this end, allowing for back-to-back and side-by-side energy storage systems, saving plant and station space.

[0037] The integrated power unit 10 of the liquid-cooled energy storage container adopts an integrated design of PCS and high-voltage box, which saves the internal space of the integrated converter cabin 2, realizes rapid data interaction and control between PCS and BMS, improves control efficiency, reduces safety risks, reduces the number of components in the electrical cabin, and realizes the maintainability of the water-cooled unit and the electrical cabin 1 and the rationality of the device layout.

[0038] The liquid cooling system for the liquid-cooled energy storage container consists of a liquid cooling unit 12 and liquid cooling piping. Liquid cooling unit 12 is a dual-liquid cooling unit that intelligently adjusts and controls the water output of the cooling unit based on the temperature of the battery pack and the integrated power unit. The cooling unit 12 is located between the cooling unit and the electrical compartment 1. The cooling piping consists of three stages, extending from the top of the container to the integrated power unit 10 or, in stages, into the battery pack 9. The diameter of the three-stage piping decreases from stage one to stage three. The output from the cooling unit 12 to the top of the container is the primary pipe 5; the secondary pipe 6 runs from the primary pipe 5 on the upper part of the container to the battery rack 8; and the tertiary pipe 7 connects the secondary pipe 6 and the water-cooled base plate of the battery pack 9 and the integrated power unit 10. The primary pipe 5 is located on the width side of the container with a single door. A fire extinguisher cabinet 13 is located at the end of the container's cooling unit and electrical compartment 1, ensuring that it does not affect the functionality of the system when deployed in a back-to-back parallel configuration. The integrated power unit 10 is placed in the middle of each column of battery holders 8 and is physically isolated from the battery clusters by an isolation plate to prevent mutual influence.

[0039] The liquid-cooled energy storage containers utilize pack-grade perfluorohexanone (PFH) and cabin-grade water firefighting. Each container contains a set of FHH firefighting equipment to manage each energy storage unit. Firefighting piping and internal control lines are routed through the top of the container. External power and control lines are routed through the cable trench at the bottom of the integrated converter cabin 2 and fed into the upper-level control cabinet. This reduces the number of components in the water-cooled units and electrical compartment 1 and increases their maintainability. The container also includes a reserved water firefighting interface controlled by a solenoid valve, which is activated when water firefighting is required.

[0040] The liquid-cooled container provided in this embodiment adopts a dual liquid cooling design of PCS and PACK, which optimizes the heat dissipation method and achieves refined heat dissipation management. The water output can be intelligently adjusted according to the temperature of the PACK and PCS to improve the heat dissipation efficiency of the PCS and batteries and enhance reliability. This embodiment adopts an AC / DC integrated design. The battery PCAK and PCS are placed together in the container, and DC does not leave the box. This reduces stray inductance and parasitic capacitance, and reduces the risk of DC arcing, short circuit and lightning strike, further improving system integration, power density and modularity. The integrated power unit (PCS and high-voltage box integrated design) can quickly realize PCS and BMS data exchange and control, improve control efficiency, and reduce safety risks. The integrated power unit (PCS and high-voltage box integrated design) is placed in the middle of the battery bracket to facilitate the connection and wiring of the upper and lower battery clusters and the corresponding PCS. The use of large-capacity battery cells and a 1P104S large PACK design enables single-side door opening of the container. High energy density, high power density, small footprint, and better economy; improve the standardization of battery containers, flexibly compatible with the installation of 11 and 12 energy storage units, and adaptable to high-voltage direct-mounted energy storage systems of different specifications.

[0041] Example 2

[0042] This embodiment provides a high-voltage direct-mounted energy storage system liquid-cooled container, comprising: a water-cooled unit and electrical compartment 1 and an integrated converter compartment 2, wherein the water-cooled unit and electrical compartment 1 and the integrated converter compartment 2 are integrally formed;

[0043] A battery holder 8, a battery pack 9 and an integrated power unit 10 are arranged in the integrated converter cabin 2. The battery holder 8 includes an upper layer, a middle layer and a lower layer. The battery pack 9 is arranged in the upper and lower layers of the battery holder 8. The integrated power unit 10 is arranged in the middle layer of the battery holder 8. The integrated power unit consists of a PCS module and a high-voltage box.

[0044] An insulating support seat 11 is provided at the bottom of the battery holder 8 .

[0045] A liquid cooling unit 12 and a control cabinet 14 are provided in the water cooling unit and the electrical compartment 1. The liquid cooling unit 12 is a dual liquid cooling unit. When in use, one liquid cooling unit dissipates heat for the battery PACK 9 and the other liquid cooling unit dissipates heat for the integrated power unit 10.

[0046] The integrated converter cabin 2 also includes a cooling pipeline, which is connected to a liquid cooling unit.

[0047] The cooling pipeline includes a primary pipeline 5, a secondary pipeline 6 and a tertiary pipeline 7; the primary pipeline 5 is connected from the liquid cooling unit 12 to the bottom of the integrated converter cabin 2; the secondary pipeline 6 is connected to the primary pipeline 5, and is connected from the upper layer of the battery bracket 8 to the bottom of the battery bracket 8, and is connected from the upper layer of the battery bracket 8 to the integrated power unit 10; the tertiary pipeline 7 is connected to the secondary pipeline 6, and connects the battery PACK 9 and the integrated power unit 10.

[0048] A vacuum bypass switch is provided on the AC side of the integrated power unit 10 , and a DC circuit breaker is provided on the DC side.

[0049] A fire extinguisher cabinet 13 is installed in the water-cooled unit and electrical compartment 1. A cable trench is provided at the bottom of the integrated converter compartment 2. The integrated converter compartment 2 is provided with a single-side double-door 4 along the length of the liquid-cooled container, and the water-cooled unit and electrical compartment 1 is provided with end double-doors 3 along the width of the liquid-cooled container.

[0050] Three battery packs 9 are respectively arranged on the upper and lower layers of the battery holder 8 , and two integrated power units 10 are arranged on the middle layer of the battery holder 8 .

[0051] The liquid-cooled energy storage container contains 11 sets of energy storage units, with two sets of energy storage units arranged one above the other on a battery rack 8. Each set of energy storage units consists of three 1P104S large battery packs 9 and an integrated power unit 10. That is, each row of battery racks 8 within the integrated converter cabin 2 has seven layers. The three upper and lower layers are used to install battery packs 9, totaling 33 battery packs 9; the middle layer is used to install integrated power units 10, totaling 11 integrated power units 10; and below the battery racks 8 is an insulating support 11. The container control lines are connected to the water-cooled unit and electrical compartment 1 through a cable trench at the bottom of the integrated converter cabin 2. Sealing components are designed for the water-cooled unit, electrical compartment 1, and integrated converter cabin 2.

[0052] The liquid-cooled container provided in this embodiment can address issues such as low standardization, low heat dissipation efficiency, high auxiliary power consumption, large footprint, high risk of DC arcing, and low transmission efficiency between the PCS and BMS in existing high-voltage direct-mounted energy storage system containers. The integrated power unit 10 of the liquid-cooled energy storage container is composed of a PCS module and a high-voltage box. A vacuum bypass switch is configured on the AC side to provide automatic online bypass and online redundancy in the event of a fault, achieving fault isolation. A DC circuit breaker is also configured on the DC side to ensure reliable DC disconnection. Each battery cluster in the liquid-cooled energy storage container corresponds to an integrated power unit 10. The integrated power unit 10 is placed in the middle of each row of battery racks 8, facilitating DC input and AC output connections. The integrated power unit is physically isolated from the battery cluster. Physical isolation is implemented between the liquid cooling unit, the electrical compartment, and the integrated converter compartment of the liquid-cooled energy storage container to prevent the potential for arcing caused by electrical component operation and the generation of flammable gases within the integrated converter compartment.

[0053] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are merely illustrative in all respects and are not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. A high-pressure direct-mounted energy storage system liquid-cooled container, characterized in that: include: The water-cooling unit and the electrical compartment (1) and the integrated converter compartment (2) are integrally formed. A battery support (8), a battery pack (9) and an integrated power unit (10) are arranged in the integrated converter cabin (2); the battery support (8) comprises an upper layer, a middle layer and a lower layer; the battery pack (9) is arranged on the upper layer and the lower layer of the battery support (8); the integrated power unit (10) is arranged on the middle layer of the battery support (8); and the integrated power unit is composed of a PCS module and a high-voltage box.

2. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: An insulating support seat (11) is provided at the bottom of the battery bracket (8).

3. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: A liquid cooling unit (12) and a control cabinet (14) are provided in the water cooling unit and the electrical compartment (1). The liquid cooling unit (12) is a dual liquid cooling unit. When in use, one liquid cooling unit dissipates heat for the battery PACK (9), and the other liquid cooling unit dissipates heat for the integrated power unit (10).

4. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 3, characterized in that: The integrated converter cabin (2) also includes a cooling pipeline, which is connected to a liquid cooling unit.

5. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 4, characterized in that: The cooling pipeline includes a primary pipeline (5), a secondary pipeline (6) and a tertiary pipeline (7); The primary pipeline (5) is connected from the liquid cooling unit (12) to the bottom of the integrated flow conversion cabin (2); The secondary pipeline (6) is connected to the primary pipeline (5), and is connected from the upper layer of the battery support (8) to the bottom of the battery support (8), and is also connected from the upper layer of the battery support (8) to the integrated power unit (10); The tertiary pipeline (7) is in communication with the secondary pipeline (6) and is connected to the battery pack (9) and the integrated power unit (10).

6. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: A vacuum bypass switch is provided on the AC side of the integrated power unit (10), and a DC circuit breaker is provided on the DC side.

7. The high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: A fire extinguisher cabinet (13) is provided in the water-cooling unit and the electrical compartment (1).

8. The high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: A cable trench is provided at the bottom of the integrated converter cabin (2).

9. The high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: The integrated converter cabin (2) is provided with a single-side double door (4) along the length direction of the liquid-cooled container, and the water-cooled unit and electrical cabin (1) are provided with an end double door (3) along the width direction of the liquid-cooled container.

10. A high-pressure direct-mounted energy storage system liquid-cooled container according to claim 1, characterized in that: A plurality of battery supports (8) are provided, and three battery packs (9) are provided on the upper and lower layers of each battery support (8), respectively. Two integrated power units (10) are provided on the middle layer of the battery support (8). The three battery packs (9) on the upper layer and the one integrated power unit (10) on the middle layer constitute one set of energy storage units, and the three battery packs (9) on the lower layer and the other integrated power unit (10) on the middle layer constitute another set of energy storage units.

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