Battery module, energy storage system and electric equipment

Abstract

The utility model provides a battery module, an energy storage system and electric equipment, the battery module comprises: two end plates, the two end plates are located in an accommodating space, and the two end plates are distributed at an interval along a first direction; the battery assembly is arranged between the two end plates, the battery assembly comprises a plurality of single batteries, the single batteries are arranged in the first direction, the width direction of each single battery is the second direction, one end of each single battery in the third direction is provided with a terminal, and the other end of each single battery in the third direction is provided with a terminal; the area of the outer surface of the battery cell in the first direction is larger than the area of the outer surface of the battery cell in the second direction and the third direction; and the mounting piece is positioned on the outer surface of the end plate in the second direction and is used for fixing the end plate on the shell. The battery module disclosed by the utility model has the advantages of high battery capacity, convenience in assembly and the like.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and more specifically, to a battery module, an energy storage system and an electrical device. Background Art

[0002] Existing energy storage systems use a mounting structure to attach the battery module to the housing. A battery module consists of multiple cells, each with a large and small outer surface. The mounting structure is typically installed outside and opposite the large outer surface. This thick mounting structure takes up space in the cells. Furthermore, while the housing remains unchanged, this increases the difficulty of battery module assembly and reduces the module's capacity. Utility Model Content

[0003] The utility model provides a new technical solution for a battery module, an energy storage system and an electrical device, which can at least solve at least one of the technical problems of the prior art of the battery module having a small capacity and being difficult to assemble.

[0004] According to a first aspect of the present invention, a battery module is provided, comprising: two end plates, the two end plates being located in the receiving space, the two end plates being spaced apart and distributed along a first direction; a battery assembly, the battery assembly being arranged between the two end plates, the battery assembly comprising a plurality of battery cells, the plurality of battery cells being arranged along the first direction, the width direction of each battery cell being a second direction, and a terminal being provided at one end of each battery cell in a third direction, the area of the outer surface of the battery cell in the first direction being greater than the area of the outer surface of the battery cell in the second direction and the third direction; a mounting member, the mounting member being arranged on a side of at least one end plate away from the battery assembly and located on the outer surface of the end plate in the second direction, the mounting member being used to fix the end plate to the outer shell on the outside of the battery module.

[0005] Optionally, in the first direction, a fireproof plate is provided between two adjacent battery cells.

[0006] Optionally, a through hole is provided on the mounting member, and the battery module further comprises: a strap, the strap passes through the through hole, and the strap surrounds the battery assembly along the circumference of the battery assembly.

[0007] Optionally, a limiting groove is provided on a side of the end plate away from the battery assembly, and the strap passes through the limiting groove.

[0008] Optionally, the limiting groove is provided on the outer surface of the end plate in the first direction.

[0009] Optionally, there are multiple battery assemblies, and an external connecting plate is provided between two of the battery assemblies. The battery assembly further includes: a lead-out plate, which is provided on the battery assembly and electrically connected to the external connecting plate; a mounting seat, which is provided on the side of the end plate away from the battery assembly; and an insulating seat, which is detachably mounted on the mounting seat and is used to fix the external connecting plate.

[0010] Optionally, the battery assembly further includes: a protective plate, which is arranged on the outer side of the battery assembly in the third direction; and an insulating plate, which is located between the protective plate and the battery assembly.

[0011] Optionally, the battery assembly further includes: a signal acquisition connector, the signal acquisition connector is connected to the battery assembly for collecting the signal of the battery assembly, the signal acquisition connector has a plug block; a connector mounting seat, the connector mounting seat is provided on the end plate, the connector mounting seat is provided with a connector mounting hole, and the plug block is installed in the connector mounting hole.

[0012] According to a second aspect of the present invention, an energy storage system is provided, comprising: a housing having a receiving space; a battery assembly, the battery assembly being the battery assembly of any of the above embodiments, the battery assembly being located in the receiving space, and the battery assembly being fixed to the housing via a mounting member.

[0013] According to a third aspect of the present invention, an electrical device is provided, comprising the energy storage system of any one of the above embodiments.

[0014] According to the battery module of the embodiment of the present application, the mounting parts are arranged on the outside of the end plates, for example, the mounting parts are arranged on the outside of the two end plates, or on the two opposite outsides of the battery module, which saves space at the end of the battery module, improves the space utilization efficiency of the battery module, and improves the battery capacity of the battery assembly. In addition, the mounting parts are arranged on the outside of the end plates, protruding from the battery assembly, shortening the distance between the mounting parts and the inner wall of the outer shell, and reducing the difficulty of assembling the battery module and the outer shell.

[0015] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 is a partial structural diagram of an energy storage system according to an embodiment of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of a battery module according to an embodiment of the present invention from one perspective;

[0019] Figure 3 This is a partial structural diagram of a battery module according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the connection between the lead-out piece and the insulating seat of a battery module according to one embodiment of the present utility model;

[0021] Figure 5 This is a structural schematic diagram of an insulating seat of a battery module according to an embodiment of the present utility model;

[0022] Figure 6 This is a structural schematic diagram of a battery module according to an embodiment of the present invention from another perspective;

[0023] Figure 7 This is a schematic diagram of the coordination of a battery cell and a fireproof plate of a battery module according to one embodiment of the present utility model;

[0024] Figure 8 The present invention is a schematic diagram of the assembly of a signal acquisition connector and a connector mounting seat of a battery module according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Housing 10;

[0027] Battery module 20; upper battery module 21; lower battery module 22;

[0028] End plate 231; limiting groove 2311;

[0029] Battery assembly 232; battery cell 2321;

[0030] Mounting member 233; mounting hole 2331; through hole 2332;

[0031] belt 234;

[0032] Leading piece 235;

[0033] Mounting seat 236;

[0034] Insulation seat 237;

[0035] protective plate 238;

[0036] Insulation board 239;

[0037] Signal acquisition connector 24;

[0038] Insert 241;

[0039] Connector mounting seat 25; Connector mounting hole 251;

[0040] Fireproof board 261; embedded nut 262; buckle 263; connecting piece 264. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0043] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0044] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0045] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] The battery module 20 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] like Figures 1 to 8 As shown, the battery module 20 according to the embodiment of the present application includes: two end plates 231, a battery assembly 232 and a mounting member 233. The battery module 20 can be installed in the receiving space of the housing 10.

[0048] Specifically, the two end plates 231 are spaced apart and distributed along a first direction. The battery assembly 232 is disposed between the two end plates 231. The battery assembly 232 includes a plurality of battery cells 2321. The plurality of battery cells 2321 are arranged along the first direction. The width direction of each battery cell 2321 is the second direction. Each battery cell 2321 has a terminal at one end in the third direction. The area of the outer surface of the battery cell 2321 in the first direction is greater than the area of the outer surface of the battery cell 2321 in the second and third directions. The mounting member 233 is disposed on a side of at least one end plate 231 away from the battery assembly 232 and is located on the outer surface of the end plate 231 in the second direction. The mounting member 233 is used to secure the end plate 231 to the housing 10.

[0049] In other words, the housing 10 defines a receiving space in which one or more battery modules 20 may be installed. For example, there may be two battery modules 20 , which may be divided into an upper battery module 21 and a lower battery module 22 .

[0050] Each battery module 20 is primarily composed of two end plates 231, a battery assembly 232, and a mounting member 233. The two end plates 231 are located within the receiving space and are spaced apart along a first direction, with the battery assembly 232 disposed between the two end plates 231. For example, the two end plates 231 are spaced apart along a left-right direction, with the battery assembly 232 sandwiched between the two end plates 231.

[0051] Furthermore, the battery assembly 232 includes a plurality of battery cells 2321, which are arranged along a first direction. The width of each battery cell 2321 is the second direction, and each battery cell 2321 is provided with a terminal at one end in the third direction. Any two of the first, second, and third directions may be at an angle to each other. For example, the first direction may be the left-right direction, the second direction may be the front-back direction, and the third direction may be the vertical direction. Alternatively, the first direction may be defined as the X-axis direction, the second direction may be defined as the Y-axis direction, and the third direction may be defined as the Z-axis direction.

[0052] Furthermore, the outer surfaces of battery cell 2321 include a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface. The first surface and the second surface are opposite each other and can be spaced apart in the first direction; the third surface and the fourth surface are opposite each other and can be spaced apart in the third direction, and terminals can be provided on either the third surface or the fourth surface; and the fifth surface and the sixth surface are opposite each other and can be spaced apart in the second direction. The outer surface area of battery cell 2321 in the first direction is greater than the outer surface area of battery cell 2321 in the second and third directions. In other words, the first and second surfaces can be defined as the major surfaces, and the other surfaces can be defined as the minor surfaces.

[0053] In addition, a mounting member 233 is provided on a side of at least one end plate 231 away from the battery assembly 232. The mounting member 233 can be used to secure the end plate 231 to the housing 10. For ease of description, a battery module 20 can be used as an example, with the side of the end plate 231 closer to the battery assembly 232 defined as the inner side, and the side away from the battery assembly 232 defined as the outer side. In this embodiment, by providing the mounting member 233 on the outer side of the end plate 231, for example, providing the mounting member 233 on the outer end surface of the end plate 231 in the first direction, space at the end of the battery module 20 in the first direction can be saved.

[0054] In addition, the mounting member 233 is arranged on the outer surface of the end plate 231 in the second direction, that is, the mounting member 233 is arranged on the small surface and is staggered with the surface where the terminal is arranged. This is not only conducive to the connection between the mounting member 233 and the inner wall of the outer shell 10, but also can make full use of the space in the second direction, avoiding the mounting member 233 occupying the space in the first direction and the third direction, which is conducive to ensuring the battery capacity of the battery assembly 232 while the volume of the accommodating space of the outer shell 10 remains unchanged.

[0055] Therefore, according to the battery module 20 of the embodiment of the present application, the mounting member 233 is arranged on the outside of the end plate 231, for example, the mounting member 233 is arranged on the outside of the two end plates 231, or is located on two opposite outsides of the battery module 20, thereby saving space at the end of the battery module 20, improving the space utilization efficiency of the battery module 20, and improving the battery capacity of the battery assembly 232. In addition, the mounting member 233 is arranged on the outside of the end plate 231, protruding from the battery assembly 232, shortening the distance between the mounting member 233 and the inner wall of the outer shell 10, and reducing the difficulty of assembling the battery module 20 and the outer shell 10.

[0056] Optionally, the mounting member 233 is provided with a mounting hole 2331, and the battery module 20 further includes a connector that passes through the mounting hole 2331 and is connected to the inner wall of the housing 10. In this embodiment, the battery module 20 can be fixed in the housing 10 by the engagement between the connector and the mounting hole 2331, facilitating assembly and disassembly.

[0057] Optionally, the connecting member is a fixing bolt, which is widely available and can reduce costs. For example, a mounting member 233 is provided on the outer side of the end plate 231, and a mounting hole 2331 extending from top to bottom is provided on the mounting member 233. The fixing bolt passes through the mounting hole 2331 to secure the battery module 20 within the housing 10.

[0058] In some specific embodiments of this application, Figure 7 As shown, in the first direction, a fireproof plate 261 is provided between two adjacent battery cells 2321 to improve safety performance.

[0059] According to one embodiment of the present application, Figure 3 and Figure 6 As shown, a through hole 2332 is provided on the mounting member 233, and the battery module 20 further includes: a strap 234, the strap 234 passes through the through hole 2332, and the strap 234 surrounds the battery assembly 232 along the circumference of the battery assembly 232. For example, the strap 234 is arranged in the horizontal direction, and the height direction of the battery assembly 232 is the up and down direction. Optionally, there are multiple straps 234, and the multiple straps 234 can be distributed at intervals along the third direction, so as to fix multiple positions of the battery assembly 232. In this embodiment, the mounting member 233 is also provided with a through hole 2332 through which the strap 234 can pass, so as to facilitate the limiting and fixing of the strap 234 and improve the tightness of the fit between the strap 234 and the battery assembly 232.

[0060] In some specific embodiments of the present application, a limiting groove 2311 is provided on the side of the end plate 231 away from the battery assembly 232, and the strap 234 passes through the limiting groove 2311. For example, the outer side of the end plate 231 has a limiting groove 2311 extending along the Y-axis, and a portion of the strap 234 extends along the Y-axis and is located within the limiting groove 2311. In this embodiment, the limiting groove 2311 can limit the direction of the strap 234. For example, the limiting groove 2311 is composed of two protrusions spaced apart in the vertical direction, which can limit the vertical freedom of the strap 234.

[0061] According to one embodiment of the present application, the limiting groove 2311 is provided on the outer surface of the end plate 231 in the first direction. In this embodiment, the limiting groove 2311 is provided on the outer surface of the end plate 231 in the first direction, that is, on the large surface. This can extend the length of the limiting groove 2311 and facilitate the formation of the limiting groove 2311. In addition, the limiting groove 2311 provided on the large surface will not interfere with the mounting member 233 on the small surface.

[0062] According to one embodiment of the present application, there are multiple battery assemblies 232, and an external connecting piece is provided between two battery assemblies 232, such as Figure 4 As shown, the battery module 20 further includes: a lead-out piece 235 , a mounting seat 236 and an insulating seat 237 .

[0063] Specifically, the lead-out tab 235 is provided on the battery assembly 232, and the lead-out tab 235 is electrically connected to the external connection tab. The mounting seat 236 is provided on the side of the end plate 231 away from the battery assembly 232. The insulating seat 237 is detachably mounted on the mounting seat 236, and the insulating seat 237 is used to fix the external connection tab. In other words, the mounting seat 236 is provided on the end plate 231, and the insulating seat 237 is provided on the mounting seat 236. The insulating seat 237 is detachably connected to the mounting seat 236. For example, the insulating seat 237 is provided with a buckle 263, and the mounting seat 236 is provided with a buckle hole corresponding to the buckle 263. The mounting seat 236 and the insulating seat 237 are connected by the buckle. For another example, an embedded nut 262 is provided on the insulating seat 237, and the end of the lead-out piece 235 is fixed to the insulating seat 237 by a bolt and the embedded nut 262. The external connecting pieces such as the copper busbar between the battery assemblies 232 are fixed on the insulating seat 237 and electrically connected to the lead-out piece 235.

[0064] In this embodiment, lead-out tabs 235 may be provided at both ends of the battery assembly 232 , and the lead-out tabs 235 may be electrically connected to the lead-out tabs 235 of other battery assemblies 232 , thereby achieving electrical connection between the battery assemblies 232 .

[0065] According to one embodiment of the present application, the battery module 20 includes: a protective plate 238 and an insulating plate 239. The protective plate 238 is provided on the outer side of the battery assembly 232 in the third direction, and the insulating plate 239 is located between the protective plate 238 and the battery assembly 232. For example, the insulating plate 239 and the protective plate 238 are provided at the upper end of the battery assembly 232. In addition, the insulating plate 239 is provided between the battery cell 2321 and the protective plate 238. The poles of the battery cell 2321 can extend from the insulating plate 239, and the battery cells 2321 can be electrically connected to each other through the connecting piece 264. In this embodiment, the use of the protective plate 238 and the insulating plate 239 can improve safety performance.

[0066] According to one embodiment of the present application, Figure 8As shown, the battery module 20 further includes: a signal acquisition connector 24 and a connector mounting seat 25. The signal acquisition connector 24 is connected to the battery assembly 232 for collecting signals from the battery assembly 232. The signal acquisition connector 24 has an insert 241. The connector mounting seat 25 is provided on the end plate 231. The connector mounting seat 25 is provided with a connector mounting hole 251, and the insert 241 is installed in the connector mounting hole 251. In other words, in this embodiment, the connector mounting seat 25 is fixed to the end plate 231, and the connector mounting seat 25 is provided with a connector mounting hole 251. The back of the signal acquisition connector 24 is provided with an insert 241. The insert 241 can be inserted into the connector mounting seat 25, thereby achieving a fixed connection between the signal acquisition connector 24 and the end plate 231.

[0067] In summary, the battery module 20 according to the embodiment of the present application improves the capacity of the battery assembly 232 while the housing 10 remains unchanged, thereby reducing the difficulty of assembling the battery module 20 .

[0068] The present invention also provides an energy storage system, including: a housing 10 and a battery module 20, the housing 10 has a receiving space, the battery module 20 is located in the receiving space, the battery module 20 is a battery module 20 of any of the above embodiments, and the battery module 20 is fixed to the housing 10 by a mounting member 233, which facilitates assembly of the housing 10 and the battery module 20.

[0069] The present invention further provides an electrical device comprising the energy storage system described in any of the above embodiments. Since the energy storage system has advantages such as large battery capacity and ease of assembly, the electrical device of the present invention also has the same advantages, which will not be described in detail here. The electrical device may be a vehicle, such as a forklift.

[0070] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery module (20), characterized in that: include: two end plates (231), the two end plates (231) being spaced apart and distributed along a first direction; A battery assembly (232), the battery assembly (232) being arranged between the two end plates (231), the battery assembly (232) comprising a plurality of battery cells (2321), the plurality of battery cells (2321) being arranged along the first direction, the width direction of each battery cell (2321) being the second direction, each battery cell (2321) being provided with a terminal at one end in the third direction, the area of the outer surface of the battery cell (2321) in the first direction being greater than the areas of the outer surfaces of the battery cell (2321) in the second and third directions; A mounting member (233) is provided on a side of at least one of the end plates (231) away from the battery assembly (232) and located on the outer surface of the end plate (231) in the second direction, and the mounting member (233) is used to fix the end plate (231) to the outer shell (10) of the battery module (20).

2. The battery module (20) according to claim 1, characterized in that: In the first direction, a fireproof plate (261) is provided between two adjacent battery cells (2321).

3. The battery module (20) according to claim 1, characterized in that: The mounting member (233) is provided with a through hole (2332), and the battery module further comprises: A strap (234) passes through the through hole (2332), and the strap (234) surrounds the battery assembly (232) along the circumference of the battery assembly (232).

4. The battery module (20) according to claim 3, characterized in that: A limiting groove (2311) is provided on a side of the end plate (231) away from the battery assembly (232), and the strap (234) passes through the limiting groove (2311).

5. The battery module (20) according to claim 4, characterized in that: The limiting groove (2311) is provided on the outer surface of the end plate (231) in the first direction.

6. The battery module (20) according to claim 1, characterized in that: There are multiple battery assemblies (232), and an external connecting piece is provided between two battery assemblies (232). The battery module further comprises: A lead-out piece (235), the lead-out piece (235) is provided on the battery assembly (232), and the lead-out piece (235) is electrically connected to the external connection piece; A mounting seat (236), the mounting seat (236) being provided on a side of the end plate (231) away from the battery assembly (232); An insulating seat (237), the insulating seat (237) is detachably mounted on the mounting seat (236), and the insulating seat (237) is used to fix the external connecting piece.

7. The battery module (20) according to claim 1, characterized in that: Also includes: a protective plate (238), the protective plate (238) being arranged on the outer side of the battery assembly (232) in the third direction; An insulating plate (239), the insulating plate (239) is located between the protective plate (238) and the battery assembly (232).

8. The battery module (20) according to claim 1, characterized in that: Also includes: a signal acquisition connector (24), the signal acquisition connector (24) being connected to the battery assembly (232) for collecting signals from the battery assembly (232), the signal acquisition connector (24) having an insert block (241); A connector mounting seat (25) is provided on the end plate (231), the connector mounting seat (25) is provided with a connector mounting hole (251), and the insert block (241) is installed in the connector mounting hole (251).

9. An energy storage system, characterized in that: include: A housing (10), wherein the housing (10) has a receiving space; A battery module (20), wherein the battery module (20) is the battery module (20) according to any one of claims 1 to 8, the battery module (20) is located in the receiving space, and the battery module (20) is fixed to the housing (10) via a mounting member (233).

10. An electrical device, characterized in that: Including the energy storage system according to claim 9.

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