Battery pack and energy storage system

Abstract

The utility model discloses a battery pack and an energy storage system. The battery pack comprises a cabinet body provided with a closed accommodating cavity; the supporting pieces are arranged in the containing cavity at intervals in the vertical direction so as to divide the containing cavity into a plurality of placement cavities; and the plurality of battery modules are arranged in the placing cavities in a one-to-one correspondence manner. The battery pack in the scheme can be directly used as an energy storage system, when the battery pack is used as the energy storage system, the cabinet body is adopted as a battery pack protection design, and the cabinet body plays a role of a shell and an external carrier of the battery pack, so that the redundant degree of the overall structure of the battery pack is greatly reduced, and the service life of the battery pack is prolonged. And the production processing difficulty and the economic cost are reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage, and more particularly to a battery pack and energy storage system. Background Technology

[0002] Battery packs are a core component of new energy technologies, serving as energy storage modules in energy storage systems. When used in energy storage systems, battery packs typically require external supports such as cabinets for protection or support, resulting in a complex overall structure, intricate installation, and high costs. Utility Model Content

[0003] This application provides a battery pack and energy storage system to reduce structural complexity and production costs.

[0004] In a first aspect, this application provides a battery pack, comprising: a cabinet having a sealed accommodating cavity; a plurality of support members spaced apart in the accommodating cavity in a vertical direction to divide the accommodating cavity into a plurality of placement cavities; and a plurality of battery modules, each corresponding to one of the placement cavities.

[0005] To achieve the above technical solution, when assembling the battery pack, the battery modules are placed into the placement cavity of the cabinet to form a complete battery pack. The battery pack in this application can be directly used as an energy storage system. When the battery pack is used as an energy storage system, compared with traditional battery packs, the cabinet serves as both the outer shell and external carrier of the battery pack, significantly reducing the complexity of the overall battery pack structure, reducing the number of components, and lowering the difficulty and cost of production and processing.

[0006] As one of the optional embodiments of this application, it also includes a cooling assembly, which includes an inlet pipe, an outlet pipe, and multiple liquid cooling components. Each liquid cooling component is disposed between the support and the battery module. The liquid cooling component is provided with a cooling channel, and the inlet pipe and the outlet pipe are respectively connected to the inlet and outlet of the cooling channel.

[0007] To achieve the above technical solution, the cooling medium enters the cooling channel through the inlet pipe and then flows out through the outlet pipe. During this process, the liquid cooling component is in direct contact with the battery module, thereby quickly removing the heat generated by the battery module and ensuring the safe and reliable operation of the battery pack.

[0008] As one of the optional embodiments of this application, the liquid cooling component includes a main body and an inlet connector and an outlet connector disposed on the main body. The cooling flow channel is opened in the main body. The inlet connector is connected to the inlet pipe and the outlet connector is connected to the outlet pipe.

[0009] To achieve the above technical solution, the inlet pipe and outlet pipe are connected to the liquid cooling component in a quick and detachable manner through inlet and outlet connectors, respectively. This allows the inlet pipe and the liquid cooling component, as well as the outlet pipe and the liquid cooling component, to be detached. When the inlet pipe, outlet pipe, or liquid cooling component needs maintenance, it facilitates the installation and disassembly of the operator, reduces installation and maintenance investment, and lowers costs.

[0010] As one of the optional embodiments of this application, the support member includes a plurality of support plates spaced apart along the width direction of the cabinet, with a hollow portion formed between adjacent support plates, and the main body at least covering a portion of the hollow portion.

[0011] By implementing the above technical solution, since the hollowed-out portion is located on the side of the liquid cooler away from the battery module, some of the heat in the liquid cooler can be dissipated through the hollowed-out portion. This further reduces heat accumulation in the liquid cooler, further ensuring the heat dissipation efficiency of the battery pack and improving safety. Furthermore, the liquid cooler, while providing cooling, also supports the battery module, reducing the material used in the support components and improving cost-effectiveness.

[0012] As one of the optional embodiments of this application, the support extends along the length of the cabinet, the battery cells in the battery module are stacked along the length, and the liquid inlet pipe and liquid outlet pipe are located at one end of the battery module in the length direction, and both the liquid inlet pipe and the liquid outlet pipe are located in the accommodating cavity.

[0013] As one of the optional embodiments of this application, both the inlet pipe and the outlet pipe extend vertically, and a first connector and a second connector are provided on the outside of the cabinet. The first connector is connected to the inlet pipe, and the second connector is connected to the outlet pipe.

[0014] To achieve the above technical solution, both the inlet pipe and the outlet pipe are located inside the cabinet. When the cooling medium in the inlet pipe flows through the accommodating cavity, it will also carry away the heat accumulated in the accommodating cavity, thereby playing a role in overall heat dissipation, further improving the heat dissipation efficiency of the battery pack and ensuring safety.

[0015] As one alternative embodiment of this application, the cabinet includes a frame and a sealing plate, the sealing plate covering the outside of the frame to form an accommodating cavity.

[0016] As one of the optional embodiments of this application, a sealing layer is provided between the sealing plate and the frame, the sealing layer is sandwiched between the sealing plate and the frame, and the sealing plate is detachably connected to the frame.

[0017] To achieve the above technical solution, the cabinet structure consists of a frame and a sealing plate. The sealing layer between the sealing plate and the frame can effectively improve the sealing performance, thereby ensuring the safety of the battery pack. Furthermore, the bolt connection between the sealing plate and the frame can further improve the convenience of installation and disassembly, making installation and maintenance easier.

[0018] As one of the optional embodiments of this application, it further includes a heat insulation layer disposed in the accommodating cavity, the heat insulation layer being connected to the sealing plate, and the heat insulation layer being disposed on at least one side of the battery module.

[0019] As one of the optional embodiments of this application, the cabinet is provided with functional interfaces, which are electrically connected to each battery module. The functional interfaces include charging and discharging interfaces and communication interfaces, and both the communication interface and the charging and discharging interface can be detachably connected to the cabinet.

[0020] This application also provides an energy storage system comprising multiple of the aforementioned battery packs.

[0021] One of the above technical solutions has the following advantages or beneficial effects: When assembling the battery pack, the battery modules are placed into the placement cavity of the cabinet to form a complete battery pack. The battery pack in this application can be directly used as an energy storage system. When the battery pack is used as an energy storage system, compared with traditional battery packs, due to the use of a cabinet as a protective design for the battery pack, the cabinet simultaneously serves as the outer shell and external carrier of the battery pack, significantly reducing the complexity of the overall battery pack structure, reducing the number of components used, and lowering the difficulty of production and processing as well as economic costs. Attached Figure Description

[0022] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 This is an overall structural diagram of the energy storage system provided in the embodiments of this application;

[0024] Figure 2 This is a structural diagram of the interior of the display cabinet provided in an embodiment of this application;

[0025] Figure 3 This is a structural diagram provided in an embodiment of this application to illustrate the battery module and cooling assembly;

[0026] Figure 4 This is a structural diagram provided in the embodiments of this application to illustrate the structure of the liquid-cooled component;

[0027] Figure 5 This is a structural diagram of the energy storage system provided in this application, showing the removal of the battery module and cooling assembly;

[0028] Figure 6 This is an exploded view of the cabinet structure provided in an embodiment of this application;

[0029] Figure 7 This is a top view of the energy storage system provided in the embodiments of this application.

[0030] Reference numerals: 1. Cabinet; 11. Frame; 111. Front support; 112. Rear support; 113. Intermediate beam; 12. Sealing plate; 10. Receiving cavity; 100. Placement cavity;

[0031] 2. Supporting components; 20. Hollowed-out sections;

[0032] 3. Battery module; 31. Battery pack; 32. Management module;

[0033] 4. Functional interfaces; 41. Charging / discharging interface; 42. Communication interface;

[0034] 5. Cooling assembly; 51. Liquid inlet pipe; 52. Liquid outlet pipe; 53. Liquid cooling component; 531. Main body; 532. Liquid inlet connector; 533. Liquid outlet connector; 530. Cooling flow channel;

[0035] 61. First connector; 62. Second connector; 7. Insulation layer;

[0036] Z represents the vertical direction; X represents the length direction; and Y represents the width direction. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0039] The following is in conjunction with the appendix Figure 1-7 This application will be further described below.

[0040] Reference Figures 1-2 The present application provides a battery pack, which includes a cabinet 1 and a battery module 3 and a support member 2 disposed within the cabinet 1. The cabinet 1 is rectangular in shape and has a length direction X, a width direction Y, and a vertical direction Z.

[0041] The cabinet 1 has a sealed accommodating cavity 10; multiple support members 2 are provided, which are arranged in the accommodating cavity 10 and spaced apart in the vertical direction Z, thereby dividing the accommodating cavity 10 into multiple placement cavities 100. Battery modules 3 are arranged one-to-one in the placement cavity 100.

[0042] In this embodiment, when assembling the battery pack, the battery module 3 is placed into the placement cavity 100 of the cabinet 1 to form a complete battery pack. The battery pack in this application can be directly used as an energy storage system. Compared with traditional battery packs, because the cabinet 1 is used as a protective design for the battery pack, the cabinet 1 also serves as the outer shell and carrier of the battery pack, which greatly reduces the complexity of the overall structure of the battery pack, reduces the use of parts, and reduces the difficulty of production and processing as well as economic costs.

[0043] Reference Figure 2 , Figure 3 and Figure 4 As one of the optional embodiments of this application, it also includes a cooling assembly 5, which includes an inlet pipe 51, an outlet pipe 52 and a plurality of liquid cooling components 53. Each liquid cooling component 53 is disposed one-to-one between the support 2 and the battery module 3. A cooling channel 530 is provided in the liquid cooling component 53, and the inlet pipe 51 and the outlet pipe 52 are respectively connected to the inlet and outlet of the cooling channel 530.

[0044] To achieve the above technical solution, the cooling medium enters the cooling channel through the inlet pipe 51 and then flows out through the outlet pipe 52. During this period, the liquid cooling component 53 is in direct contact with the battery module 3, thereby quickly removing the heat generated by the battery module 3 and ensuring the safe and reliable operation of the battery pack 31 and the battery stack.

[0045] As one optional embodiment of this application, the liquid cooling component 53 includes a main body 531 and an inlet connector 532 and an outlet connector 533 disposed on the main body 531. A cooling channel 530 is formed within the main body 531. The inlet connector 532 is inserted and connected to the inlet pipe 51, and the outlet connector 533 is inserted and connected to the outlet pipe 52. In some examples, the main body 531 is a plate-like structure, and the cooling channel 530 is formed in an S-shape within the main body 531. In other optional examples, the main body 531 may also be a tubular structure, and the cooling channel 530 is not limited to an S-shape.

[0046] It is understandable that the connector refers to a connector structure that can be quickly plugged into the outside. This allows the inlet pipe 51 and outlet pipe 52 to be quickly and detachably connected to the liquid cooling component 53 through the inlet connector 532 and outlet connector 533, respectively. Therefore, the inlet pipe 51 and the liquid cooling component 53, and the outlet pipe 52 and the liquid cooling component 53 can be detached. When the inlet pipe 51, outlet pipe 52 or liquid cooling component 53 needs maintenance, it can facilitate the installation and disassembly maintenance work of the operator, reduce the investment in installation and maintenance, and reduce costs.

[0047] Reference Figure 2 , Figure 3 and Figure 5 As one of the optional embodiments of this application, the support member 2 includes a plurality of support plates spaced apart along the width direction Y of the cabinet 1, with a hollow portion 20 formed between adjacent support plates, and the main body 531 at least covering a portion of the hollow portion 20.

[0048] In some examples, each support member 2 includes two support plates, which are respectively connected to the inner walls of opposite sides of the cabinet 1 along the width direction Y. The size of the battery cell in the battery module 3 in the width direction Y is larger than the size of the hollow part 20 in the width direction Y.

[0049] To achieve the above technical solution, since the hollow portion 20 is located on the side of the liquid cooler 53 opposite to the battery module 3, some of the heat in the liquid cooler 53 can be dissipated through the hollow portion 20. This further reduces the accumulation of heat in the liquid cooler 53, further ensuring the heat dissipation efficiency of the battery pack and improving safety. Furthermore, the liquid cooler 53, while providing cooling, also supports the battery module 3, reducing the material used in the support component 2 and improving economic efficiency.

[0050] As one optional embodiment of this application, the support member 2 extends along the length direction X of the cabinet 1, the battery cells in the battery module 3 are stacked along the length direction X, and the liquid inlet pipe 51 and the liquid outlet pipe 52 are disposed at one end of the battery module 3 located in the length direction X, both of which are disposed within the accommodating cavity 10. Both the liquid inlet pipe 51 and the liquid outlet pipe 52 extend along the vertical direction Z. A first connector 61 and a second connector 62 are disposed on the outside of the cabinet 1, the first connector 61 being connected to the liquid inlet pipe 51 and the second connector 62 being connected to the liquid outlet pipe 52.

[0051] To achieve the above technical solution, both the inlet pipe 51 and the outlet pipe 52 are located inside the cabinet 1. When the cooling medium in the inlet pipe 51 flows through the accommodating cavity 10, it will also carry out the heat accumulated in the accommodating cavity 10, thereby playing the role of overall heat dissipation, further improving the heat dissipation efficiency of the battery pack and ensuring safety.

[0052] As one optional embodiment of this application, it further includes a thermal insulation layer 7, which is disposed within the accommodating cavity 10 and connected to the sealing plate 12. The thermal insulation layer 7 is distributed on at least one side of the battery module 3. In some examples, the thermal insulation layer 7 is a thermal insulation fiber cotton layer. The thermal insulation layer 7 can improve the temperature stability of the battery module 3, thereby reducing the interference caused by fluctuations in the external ambient temperature and ensuring the performance of the battery pack.

[0053] Reference Figure 6 As one optional embodiment of this application, the cabinet 1 includes a frame 11 and a sealing plate 12, the sealing plate 12 covering the outside of the frame 11 to form an accommodating cavity 10. In some examples, the frame 11 includes a front support 111, a rear support 112, and a middle beam 113, wherein the front support 111 and the rear support 112 are rectangular and are spaced apart along the length direction X, and the middle beam 113 connects the edges of the front support 111 and the rear support 112. Optionally, the front support 111, the rear support 112, and the middle beam 113 are all made of aluminum profiles. Optionally, the connection between the aluminum profiles constituting the front support 111, or between the aluminum profiles constituting the rear support 112, or between the middle beam 113 and the front support 111 and the rear support 112 is detachable and spliced, such as bolt connection or snap-fit ​​connection.

[0054] Understandably, frame 11 can also be made using other processes, such as bending, sheet metal work, roll forming, etc.

[0055] As one optional embodiment of this application, a sealing layer is provided between the sealing plate 12 and the frame 11, with the sealing layer sandwiched between the sealing plate 12 and the frame 11. The sealing plate 12 is detachably connected to the frame 11. In some examples, the sealing plate 12 consists of six pieces, connected to the frame 11 from the front, back, left, right, top, and bottom respectively, thereby enclosing and forming the aforementioned receiving cavity 10. Optionally, the sealing plate 12 is bolted to the frame 11 to enhance the structural reliability of the sealing plate 12 and to achieve a detachable connection between the sealing plate 12 and the frame 11 for later use and maintenance. In some examples, the sealing layer can be a sealing gasket, for example, optionally, a gasket made of foamed silicone foam. In other examples, the sealing layer can be a gel structure, for example, optionally, the sealing layer is formed by the curing of polyurethane adhesive. Alternatively, the sealing layer can also be a combination of a sealing gasket and adhesive, in which case the sealing plate 12 is no longer detachable from the frame 11.

[0056] To achieve the above technical solution, the cabinet 1 structure is composed of a frame 11 and a sealing plate 12. The sealing layer between the sealing plate 12 and the frame 11 can effectively improve the sealing performance, thereby ensuring the safety of the battery pack. Furthermore, the bolt connection between the sealing plate 12 and the frame 11 can further improve the convenience of installation and the structural reliability.

[0057] Reference Figure 6 and Figure 7 As one optional embodiment of this application, the cabinet 1 is provided with a functional interface 4, which is electrically connected to each battery module 3. The functional interface 4 includes a charging / discharging interface 41 and a communication interface 42, both of which are detachably connected to the cabinet 1. In some examples, the charging / discharging interface 41 and the communication interface 42 are respectively located on both sides of the cabinet 1 in the width direction Y.

[0058] In addition, this application also provides an energy storage system comprising multiple battery packs as described above. The multiple battery packs are connected in series or parallel according to different energy storage requirements, thereby achieving grid connection.

[0059] The above description is only a partial implementation of the embodiments of this application and is not intended to limit the application in any way. The protection scope of the embodiments of this application is not limited thereto. Any simple modifications, equivalent changes and alterations that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery pack, characterized in that, include: Cabinet (1), the cabinet (1) includes a frame (11) and a sealing plate (12), the sealing plate (12) covering the outside of the frame (11) to form a closed accommodating cavity (10); Multiple support members (2) are spaced apart in the accommodating cavity (10) along the vertical direction (Z) to divide the accommodating cavity (10) into multiple placement cavities (100); Multiple battery modules (3) are disposed in the placement cavity (100) in a one-to-one correspondence.

2. The battery pack as described in claim 1, characterized in that, It also includes a cooling assembly (5), which includes an inlet pipe (51), an outlet pipe (52), and multiple liquid cooling components (53). Each of the liquid cooling components (53) is disposed between the support member (2) and the battery module (3). A cooling channel (530) is provided in the liquid cooling component (53). The inlet pipe (51) and the outlet pipe (52) are respectively connected to the inlet and outlet of the cooling channel (530).

3. The battery pack as described in claim 2, characterized in that, The liquid cooling component (53) includes a main body (531) and an inlet connector (532) and an outlet connector (533) disposed on the main body (531). The cooling channel (530) is opened in the main body (531). The inlet connector (532) is inserted and connected to the inlet pipe (51), and the outlet connector (533) is inserted and connected to the outlet pipe (52).

4. The battery pack as described in claim 3, characterized in that, The support member (2) includes a plurality of support plates (2a) spaced apart along the width direction (Y) of the cabinet (1), with a cutout (20) formed between adjacent support plates (2a), and the main body (531) at least covering a portion of the cutout (20).

5. The battery pack as described in claim 2 or 3, characterized in that, The support member (2) extends along the length direction (X) of the cabinet (1), the battery cells in the battery module (3) are stacked along the length direction (X), the liquid inlet pipe (51) and the liquid outlet pipe (52) are located at one end of the battery module (3) in the length direction (X), and both the liquid inlet pipe (51) and the liquid outlet pipe (52) are located in the accommodating cavity (10).

6. The battery pack as described in claim 5, characterized in that, Both the inlet pipe (51) and the outlet pipe (52) extend along the vertical direction (Z). A first connector (61) and a second connector (62) are provided on the outside of the cabinet (1). The first connector (61) is connected to the inlet pipe (51), and the second connector (62) is connected to the outlet pipe (52).

7. The battery pack as described in claim 1, characterized in that, A sealing layer is provided between the sealing plate (12) and the frame (11), the sealing layer is sandwiched between the sealing plate (12) and the frame (11), and the sealing plate (12) is detachably connected to the frame (11).

8. The battery pack as described in claim 7, characterized in that, It also includes a heat insulation layer (7), which is disposed in the accommodating cavity (10), the heat insulation layer (7) is connected to the sealing plate (12), and the heat insulation layer (7) is disposed on at least one side of the battery module (3).

9. The battery pack as claimed in claim 1, characterized in that, The cabinet (1) is provided with a functional interface (4), which is electrically connected to each of the battery modules (3). The functional interface (4) includes a charging and discharging interface (41) and a communication interface (42). Both the communication interface (42) and the charging and discharging interface (41) can be detachably connected to the cabinet (1).

10. An energy storage system, characterized in that, It includes multiple battery packs as described in any one of claims 1-9.

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