Liquid cooling energy storage container

Abstract

The utility model discloses a liquid cooling energy storage container which comprises a container frame. The front end in the container frame is an electrical liquid cooling cabin, and the rear end is a battery cabin; a plurality of groups of battery mounting brackets 2 are arranged in the battery cabin side by side, a high-voltage box is arranged at the bottommost layer of each group of battery mounting brackets 2, a plurality of layers of pack mounting positions are arranged on each group of battery mounting brackets 2 above the high-voltage box, each layer of pack mounting position is provided with a pack, and each high-voltage box is connected with all the packs of the battery mounting bracket 2 where the high-voltage box is located; all the high-voltage boxes are arranged close to one side of the container frame, and a fire-fighting gas cylinder is arranged at the bottom of the other side, close to the container frame, in the battery compartment. On the premise that the size of a 20-chi container is met, a 5MWh energy storage system is integrated, the system capacity is large, and the equipment integration degree is high.

Description

Technical Field

[0001] The utility model belongs to the field of energy storage boxes and relates to a liquid-cooled energy storage container. Background Art

[0002] With the implementation of the national dual-carbon strategy, the energy storage market has experienced explosive growth. The pace and scale of renewable energy deployment across wind, solar, and energy storage are increasing year by year. The generation-consumption balance offered by energy storage systems reduces the pressure on the grid to regulate passively. Currently, electrochemical energy storage systems, represented by lithium-ion batteries, are developing towards liquid cooling systems, large-capacity cells, and energy storage systems integrated into standard 20-foot containers, gradually gaining a dominant position in the market.

[0003] In the development of the energy storage industry, 5MWh liquid-cooled containers, designed to meet the needs of overseas markets and accommodate sea transport, require a standard 20-foot container size and will become a leading product in the industry. A key pain point for the industry is the limited space within a standard 20-foot container, where equipment such as battery clusters, high-voltage boxes, fire protection systems, liquid cooling systems, and electrical busbars must be accommodated. Currently, mainstream 5MWh liquid-cooled containers on the market often have an inefficient layout of these systems, making it difficult to integrate all of them within the space of a standard 20-foot container. This results in low system capacity and low space utilization. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a liquid-cooled energy storage container that integrates a 5MWh energy storage system while meeting the requirements of a 20-foot container. The system has a large capacity and a high degree of equipment integration.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A liquid-cooled energy storage container comprises a container frame;

[0007] The front end of the container frame is the electrical liquid cooling compartment, and the rear end is the battery compartment;

[0008] Multiple groups of battery mounting brackets are arranged in parallel in the battery compartment. A high-voltage box is provided at the bottom layer of each group of battery mounting brackets. Each group of battery mounting brackets is provided with multiple layers of pack mounting positions above the high-voltage box. Each layer of pack mounting positions is provided with a pack. Each high-voltage box is connected to all the packs of the battery mounting bracket where it is located.

[0009] All high-voltage boxes are installed close to one side of the container frame, and fire-fighting gas cylinders are installed in the battery compartment near the bottom of the other side of the container frame.

[0010] Preferably, the battery compartment has doors on both sides, with each side including two bi-fold doors, and the front electrical liquid cooling compartment is provided with a door in the width direction of the container frame.

[0011] Preferably, isolation plates are provided between the electrical liquid cooling compartment and the battery compartment, and between the high-voltage box and the pack.

[0012] Preferably, the rear end of the battery compartment is an end plate.

[0013] Preferably, a liquid cooling system and an electrical busbar system are provided in the electrical liquid cooling cabin; the liquid cooling system consists of a water cooling unit and liquid cooling pipelines, the water cooling unit is located in the electrical liquid cooling cabin, and the liquid cooling pipelines are output from the bottom of the water cooling unit and connected to the water-cooled base plate of each pack.

[0014] Furthermore, the liquid cooling pipeline consists of three-stage pipelines, which lead to the inside of the pack water-cooled baseplate step by step through the bottom of the container frame. The first-stage pipeline is connected to the bottom of the container frame through the output of the water-cooling unit; the diode circuit is connected to the upper part of the container frame through the battery mounting bracket through the first-stage pipeline; the triode pipeline connects the diode circuit and the pack water-cooled baseplate.

[0015] Preferably, a clamp assembly is provided on the fire cylinder, and there are two clamp assemblies, which are respectively located in the middle and tail of the fire cylinder. The bottoms of the two clamp assemblies are commonly connected to an upper guide rail, and a lower guide rail is provided on the top of the container frame bottom plate, and the guide rail is slidably connected to the lower guide rail.

[0016] Furthermore, a buffer pad is provided between the clamp assembly and the fire cylinder.

[0017] Furthermore, a handle is provided on the side of the clamp assembly facing the outside of the container.

[0018] Preferably, the bottom plate of the container frame is higher in the middle and lower at both ends, and floor drains are provided at both ends.

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

[0020] The front end of the utility model is an electrical liquid cooling cabin, which is equipped with a liquid cooling system and an electrical convergence system; the rear end is a battery cabin, which is equipped with a pack, a high-voltage box and a fire-fighting gas cylinder. A two-in-one high-voltage box solution is adopted. Each high-voltage box is connected to all the packs of the battery mounting bracket where it is located, reducing the number of high-voltage boxes by half, saving the internal space of the battery cabin, so that the fire-fighting gas cylinder can be placed in the battery cabin, reducing the number of components in the electrical liquid cooling cabin, and increasing the maintainability of the electrical cabin.

[0021] Furthermore, the packs are arranged back-to-back in the width direction of the container, so that one set of battery mounting brackets can be equipped with two clusters of packs, increasing the number of packs arranged in the container.

[0022] Furthermore, the electrical liquid cooling compartment and battery compartment are physically separated by isolation panels to prevent arcing from electrical components and flammable gases from the battery compartment. The high-voltage box is located at the bottom of each pack cluster, with an isolation panel between the high-voltage box and the pack to prevent water firefighting from affecting the high-voltage box.

[0023] Furthermore, the rear end of the electrical compartment is an end plate with no device arrangement, so that the two rear ends can be arranged back to back, saving the customer's plant land area.

[0024] Furthermore, the fire cylinder adopts a push-pull guide rail structure design, which can be easily maintained.

[0025] Furthermore, the bottom plate of the container is inclined and floor drains are provided at both ends, so that the interior of the container will not be flooded during water fire fighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the internal front structure of the liquid-cooled energy storage container of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal back structure of the liquid-cooled energy storage container of the present invention;

[0028] Figure 3 This is the appearance diagram of the door panel of the liquid-cooled energy storage container described in the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the fire-fighting gas cylinder described in the utility model;

[0030] Figure 5 This is an outline diagram of the electrical busbar system and battery compartment isolation of the present invention;

[0031] Figure 6 This is the appearance diagram of the back-to-back layout of the liquid-cooled energy storage container described in this utility model.

[0032] Among them: 1-container frame; 2-battery mounting bracket; 3-electrical busbar system; 4-water cooling unit; 5-high-voltage box; 6-isolation plate; 7-water firefighting interface; 8-firefighting gas cylinder; 9-upper clamp; 10-lower clamp; 11-upper guide rail; 12-lower guide rail; 13-handle. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrally connected; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internally connected between two elements or an interactive relationship between two elements. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. The terms used herein in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0038] To overcome the often irrational layout of existing 20-foot, 5MWh liquid-cooled energy storage containers, including the battery cluster, fire protection system, liquid cooling system, electrical system, and interconnection and dehumidification systems, the current system is difficult to integrate within a typical 20-foot space, resulting in low system capacity and low space utilization. This utility model provides a simple, reliable, strong, and highly integrated layout for liquid-cooled energy storage containers. The primary bus duct is located at the bottom of the container.

[0039] The liquid-cooled energy storage container is 20 feet in size and integrates a battery cluster, a high-voltage box 5, a liquid cooling system, a fire protection system, and an electrical busbar system 3, etc. Figure 1 and Figure 2 As shown, the container includes a container frame 1, and a battery compartment and an electrical liquid cooling compartment are arranged inside the container frame 1. The container frame 1 is designed with multiple horizontal and vertical staggered beams to improve the rigidity of the entire container.

[0040] The container frame 1 of the liquid-cooled energy storage container is divided into two parts in the length direction, the front end is the electrical liquid cooling compartment, and the rear end is the battery compartment.

[0041] The electrical liquid cooling compartment is equipped with an electrical bus system and a liquid cooling system.

[0042] There are multiple sets of battery mounting brackets 2 arranged in parallel in the battery compartment and welded to the container frame 1. In this embodiment, the preferred number of battery mounting brackets 2 is six. Figure 3 As shown, the battery compartment has doors on both sides, with two doors on each side. The number of doors is small, with only one vertical beam added in the middle of the battery compartment to mount the door hinges. This reduces the space required for the door hinges and creates more space in the battery compartment. The front electrical liquid cooling compartment has a door running the width of the compartment.

[0043] The battery compartment of the liquid-cooled energy storage container is composed of a battery cluster, a high-voltage box 5, and some firefighting components. Each set of battery mounting brackets 2 is divided into multiple layers. In this embodiment, each set of battery mounting brackets 2 is preferably divided into nine layers. The upper eight layers are pack mounting positions, and the lower layers of two adjacent sets of battery mounting brackets 2 are divided into a high-voltage box 5. Each layer of pack mounting positions is equipped with two packs arranged back-to-back in the width direction of the container. Every two clusters of packs share a set of battery mounting brackets 2. Therefore, in this embodiment, after the optimal arrangement, the number of packs totals 96, and the total number of high-voltage boxes 5 is 6.

[0044] The two ends of the liquid-cooled energy storage container in the longitudinal direction are the container ends, and the front end is the electrical liquid cooling compartment. The rear end is the end plate of the battery compartment, and no devices are placed. Figure 6 As shown, the energy storage system can realize a back-to-back layout of the back-end and the back-end, saving plant and station land.

[0045] The liquid cooling system within the liquid-cooled energy storage container consists of a water-cooling unit 4 and liquid cooling piping. The water-cooling unit 4 is located in the electrical liquid cooling compartment at the front of the container. The liquid cooling piping outputs from the bottom of the water-cooling unit 4 and consists of three stages, extending through the bottom of the container frame 1 to the interior of the pack's water-cooled baseplate. The piping from the water-cooling unit 4 to the bottom of the container frame 1 is the primary piping; the diode circuit, which runs through the primary piping and upwards from the battery mounting bracket 2 to the top of the container frame 1, is the triode circuit; and the diode circuit and the battery pack's water-cooled baseplate are connected by a triode circuit. Both the piping and the container frame 1 are secured with sheet metal tie-downs.

[0046] The high-voltage box 5 of the liquid-cooled energy storage container adopts a two-in-one high-voltage box 5 solution. Two rows of battery packs in two adjacent clusters of battery mounting brackets 2 are connected to a high-voltage box 5, which reduces the number of high-voltage boxes 5 by half and saves space inside the battery compartment.

[0047] The high-voltage box 5 of the liquid-cooled energy storage container is positioned near one side of the container frame 1. A fire-fighting gas cylinder 8 is positioned in the space behind the high-voltage box 5, reducing the number of components in the electrical busbar system 3 and increasing its maintainability. The fire-fighting gas cylinder 8 utilizes a push-pull guide rail design for easy maintenance.

[0048] In another embodiment of the present invention, Figure 4As shown, the rail-type structure of the fire cylinder 8 includes an upper rail 11, a lower rail 12, the fire cylinder 8, and a clamp assembly for securing the cylinder. The clamp assembly includes an upper clamp 9 and a lower clamp 10. The upper and lower clamps 9, 10 are directly fastened together by bolts. A cushion is placed between the upper and lower clamps 9, 10, and the fire cylinder 8. There are two upper and lower clamps 9, 10, respectively, located in the middle and rear of the fire cylinder 8. The lower clamps 10 are provided in two locations, front and back, and welded to the upper rail 11, forming a single unit. The upper rail 11 and the lower rail 12 are slidably connected, and the lower rail 12 is secured to the top of the container frame 1 floor by welding. The front lower clamp 10 faces the outside of the container and is provided with a handle 13. The handle 13 on the front lower clamp 10 allows the entire cylinder to be pulled out through the rail structure. There are two handles 13 on the front lower clamp 10.

[0049] In another embodiment of the present invention, Figure 5 As shown, the electrical liquid cooling compartment and the battery compartment of the liquid-cooled energy storage container are physically isolated by an isolation plate 6 to prevent the possibility of dangerous arcs that may be generated when the electrical components are in operation and the combustible gases that may be generated by the battery compartment. The isolation plate 6 is made of two metal plates, and rock wool is filled between the two metal plates.

[0050] In another embodiment of the present invention, the high-voltage box 5 of the liquid-cooled energy storage container is located at the bottom of the battery cluster, and an isolation plate 6 is used to physically isolate the high-voltage box 5 from the battery cluster to prevent the high-voltage box 5 from being affected by water firefighting.

[0051] In another embodiment of the present invention, the bottom plate of the liquid-cooled energy storage container frame 1 is high in the middle and low at both ends, and floor drains are provided at both ends. When water fire fighting is performed, the water is diverted to the floor drain at the bottom through the slope, so that the container will not be submerged during water fire fighting.

[0052] In another embodiment of the present invention, the water firefighting interface 7 of the liquid-cooled container is arranged at the front end of the container frame 1, which does not affect the back-to-back layout of the system parallel operation.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0054] It should be understood that the above description is for illustrative purposes only and is not intended to be limiting. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed utility model subject matter.

Claims

1. A liquid-cooled energy storage container, characterized in that: comprising a container frame (1); The front end of the container frame (1) is an electrical liquid cooling compartment, and the rear end is a battery compartment; A plurality of battery mounting brackets (2) are arranged in parallel in the battery compartment, a high-voltage box (5) is provided at the bottom layer of each battery mounting bracket (2), and multiple layers of pack mounting positions are provided above the high-voltage box (5) of each battery mounting bracket (2), each layer of pack mounting positions is provided with a pack, and each high-voltage box (5) is connected to all packs of the battery mounting bracket (2) where it is located; All high-voltage boxes (5) are arranged close to one side of the container frame (1), and a fire-fighting gas cylinder (8) is arranged in the battery compartment close to the bottom of the other side of the container frame (1).

2. The liquid-cooled energy storage container according to claim 1, characterized in that: Each pack installation position is provided with two packs arranged back to back in the width direction of the container, and each high-voltage box (5) is connected to two clusters of packs of the battery installation bracket (2) where it is located.

3. The liquid-cooled energy storage container according to claim 1, characterized in that: Isolation plates (6) are provided between the electrical liquid cooling compartment and the battery compartment, and between the high-voltage box (5) and the pack.

4. The liquid-cooled energy storage container according to claim 1, characterized in that: The rear end of the battery compartment is the end plate.

5. The liquid-cooled energy storage container according to claim 1, characterized in that: A liquid cooling system and an electrical convergence system are provided in the electrical liquid cooling cabin; the liquid cooling system is composed of a water cooling unit (4) and a liquid cooling pipeline, the water cooling unit (4) is located in the electrical liquid cooling cabin, and the liquid cooling pipeline is output from the bottom of the water cooling unit (4) and connected to the water cooling base plate of each pack.

6. The liquid-cooled energy storage container according to claim 5, characterized in that: The liquid cooling pipeline is composed of three-stage pipelines, which are led to the inside of the pack water-cooled base plate step by step through the bottom of the container frame (1). The output of the first-stage pipeline is connected to the bottom of the container frame (1) through the water cooling unit (4); the diode circuit is connected to the upper part of the container frame (1) through the first-stage pipeline from the battery mounting bracket (2); and the triode pipeline connects the diode circuit and the pack water-cooled base plate.

7. The liquid-cooled energy storage container according to claim 1, characterized in that: A clamp assembly is provided on the fire cylinder (8), and there are two clamp assemblies, which are respectively located at the middle and tail of the fire cylinder (8). The bottoms of the two clamp assemblies are commonly connected to an upper guide rail (11), and a lower guide rail (12) is provided on the top of the bottom plate of the container frame (1). The upper guide rail (11) and the lower guide rail (12) are slidably connected.

8. The liquid-cooled energy storage container according to claim 7, characterized in that: A buffer pad is provided between the clamp assembly and the fire-fighting gas cylinder (8).

9. The liquid-cooled energy storage container according to claim 7, characterized in that: A handle (13) is provided on one side of the hoop assembly facing the outside of the container.

10. The liquid-cooled energy storage container according to claim 1, characterized in that: The bottom plate of the container frame (1) is high in the middle and low at both ends, and floor drains are provided at both ends.

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