Battery module connecting structure and battery pack

Abstract

The utility model discloses a battery module connecting structure and a battery pack, and relates to the technical field of battery devices. The battery module connecting structure comprises a connecting sheet. Connecting hole sets are formed in the two ends of the connecting piece in the length direction of the connecting piece. And the connecting hole group comprises at least two connecting holes. The connecting holes are arranged at intervals along the width direction of the connecting sheet. Reinforcing ribs are arranged on the connecting pieces in the length direction. And threading holes are formed in the reinforcing ribs. And the threading hole is arranged along the length direction. The battery pack comprises a first module area, a second module area and the battery module connecting structure. Each of the first module area and the second module area comprises a plurality of battery modules which are arranged side by side. The first module area and the second module area are arranged at an interval. The battery module connecting structure is used for connecting the first module area and the second module area. According to the battery pack, the connection strength between the battery modules can be improved, connection fracture between the battery modules caused by vibration is avoided, and the overall inherent frequency of the battery pack is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery devices, and more specifically, to a battery module connection structure and a battery pack. Background Art

[0002] A battery module is an energy storage component that provides power for electrical equipment and is one of the important components of electrical equipment. Multiple battery modules are connected in series and parallel, and a battery management system (BMS), a cooling device, etc. are added to jointly form a complete battery pack.

[0003] After research by the inventor, it is found that in the prior art, small connecting pieces are used to connect battery modules, that is, connection holes are opened on the small connecting pieces, and both ends are respectively connected to the battery modules, which can ensure the strength of the battery modules in a small battery pack. In a long battery pack, multiple battery modules are often divided into multiple regions, and different regions are arranged at intervals. When the battery pack vibrates, the position with the largest amplitude is in the above-mentioned region, and the structure of using small connecting pieces cannot meet the connection strength requirements between battery modules. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery module connection structure and a battery pack, which can improve the connection strength between battery modules, avoid the connection between battery modules from breaking due to vibration, and ensure the overall natural frequency of the battery pack.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a battery module connection structure, including a connecting piece. Both ends of the connecting piece along its length direction are provided with connection hole groups. Each connection hole group includes at least two connection holes, and the connection holes are arranged at intervals along the width direction of the connecting piece. A reinforcing rib is arranged on the connecting piece along the length direction, and a wire passing hole is opened in the reinforcing rib, and the wire passing hole is arranged along the length direction.

[0007] In an optional embodiment, two wing plates are arranged at the middle position of the connecting piece along the length direction. The wing plates are fixedly connected to the connecting piece and extend towards both sides of the connecting piece.

[0008] In an optional embodiment, copper row fixing holes are opened on the wing plates.

[0009] In an optional embodiment, wire harness fixing holes are opened at one end of the wing plate away from the connecting piece.

[0010] In an optional embodiment, wire harness fixing holes are opened at the middle position of the connecting piece along the length direction.

[0011] In an alternative embodiment, chamfers are provided at both ends of the reinforcing rib along the length direction.

[0012] In an alternative embodiment, through holes are further formed at both ends of the reinforcing rib along the length direction, and the axis of the through hole is arranged along the width direction.

[0013] In an alternative embodiment, the connecting hole is a strip-shaped hole arranged along the length direction.

[0014] In a second aspect, the present utility model provides a battery pack, including a first module area, a second module area, and the battery module connection structure according to any one of the foregoing embodiments. Both the first module area and the second module area include a plurality of battery modules arranged side by side. The first module area and the second module area are arranged at intervals, and the battery module connection structure is used to connect the first module area and the second module area.

[0015] In an alternative embodiment, a module connecting member is further included, and the module connecting member is used to connect a plurality of battery modules arranged side by side.

[0016] The beneficial effects of the embodiments of the present utility model are as follows:

[0017] The battery module connection structure of the present utility model includes a connecting piece. Connecting hole groups are formed at both ends of the connecting piece along its length direction. Each connecting hole group includes two connecting holes. The connecting holes are arranged at intervals along the width direction of the connecting piece. A reinforcing rib is arranged on the connecting piece along the length direction. A wire passing hole is formed in the reinforcing rib. The wire passing hole is arranged along the length direction. The battery modules adjacent to one end of the connecting piece are fixedly connected through the connecting holes. The battery modules arranged at intervals at both ends of the connecting piece are connected through the connecting piece. By adding the reinforcing rib, the connection strength between the battery modules is improved, the connection between the battery modules is prevented from being broken due to vibration, and the overall natural frequency of the battery pack is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 FIG. is a schematic structural diagram of the battery module connection structure provided by the first embodiment of the present utility model;

[0020] Figure 2 FIG. is a schematic structural diagram of the battery pack provided by the third embodiment of the present utility model;

[0021] Figure 3 Schematic structural diagram of the battery module connection structure provided for the second embodiment of the present invention;

[0022] Figure 4 Exploded view of the battery pack provided for the third embodiment of the present invention.

[0023] Icons: 100 - Battery module connection structure; 10 - Connection piece; 11 - Connection hole group; 111 - Connection hole; 20 - Reinforcing rib; 21 - Wire passing hole; 22 - Through hole; 23 - Chamfer; 30 - Wing plate; 31 - Copper row fixing hole; 32 - Wiring harness fixing hole; 200 - Battery pack; 201 - First module area; 202 - Second module area; 203 - Battery module; 204 - Copper row; 205 - Module connector; 206 - Upper cover; 207 - Base. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0028] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] First Embodiment

[0031] Please refer to Figure 1 , this embodiment provides a battery module connection structure 100, which includes a connection piece 10. Both ends of the connection piece 10 in its length direction are provided with connection hole groups 11.

[0032] It can be understood that in this embodiment, the connection piece 10 is rectangular. Specifically, Figure 1 the x direction in

[0033] represents the length direction of the connection piece 10, and the y direction represents the width direction of the connection piece 10. The connection hole group 11 includes at least two connection holes 111. The connection holes 111 are arranged at intervals in the width direction of the connection piece 10. Specifically, in this embodiment, the number of the connection hole groups 11 is two, and the number of the connection holes 111 is four. The four connection holes 111 are respectively arranged at the four corners of the connection piece 10.

[0034] Please refer to Figure 2 , specifically, in this embodiment, the connection piece 10 is used to connect and fix the battery module 203. In this embodiment, multiple battery modules 203 are arranged in regions. The battery modules 203 in the same region are adjacent and attached to each other, and different regions are arranged at intervals. The connection hole group 11 at one end of the connection piece 10 in this embodiment is used to connect the adjacent and attached battery modules 203. The two ends of the connection piece 10 are respectively connected to the battery modules 203 in different regions. That is, the four connection holes 111 on the connection piece 10 are respectively connected to four battery modules 203.

[0035] Please continue to refer to Figure 1Optionally, in other embodiments, the number of connection holes 111 in a connection hole group 11 can be set to four, six, etc. When the number of connection holes 111 in a connection hole group 11 is four, two rows can be arranged along the length direction and two columns can be arranged along the width direction; alternatively, one row can be arranged along the length direction and four columns can be arranged along the width direction. When the number of connection holes 111 in a connection hole group 11 is six, three rows can be arranged along the length direction and two columns can be arranged along the width direction. When the number of connection holes 111 in a connection hole group 11 is set to other numbers, it can be set as required, as long as it can be ensured that an even number of columns are arranged in the width direction so that the connection holes 111 for two adjacent battery modules 203 are the same. The present utility model does not make any limitations.

[0036] In this embodiment, the connection hole 111 is a strip-shaped hole arranged along the length direction. It can be understood that setting the connection hole 111 as a strip-shaped hole can adapt to battery modules 203 at different distances and increase the installation range of the battery module connection structure 100.

[0037] To enhance the connection strength between the battery modules 203, a reinforcing rib 20 is arranged on the connection piece 10 along the length direction. Specifically, the reinforcing rib 20 is fixed at the middle position of the connection piece 10 along the width direction. When the battery modules 203 vibrate, the amplitude between the spaced-apart battery modules 203 is the largest. By setting the reinforcing rib 20, the spaced-apart battery modules 203 are stably connected, preventing the connection piece 10 from breaking.

[0038] Furthermore, a wire passing hole 21 can be formed in the reinforcing rib 20. The wire passing hole 21 is arranged along the length direction. When connecting the battery modules 203, the wire passing hole 21 can fix the wire harness. Specifically, in this embodiment, the reinforcing rib 20 is a square tube, and the reinforcing rib 20 and the connection piece 10 are fixed by welding.

[0039] To facilitate wire passing, chamfers 23 are arranged at both ends of the reinforcing rib 20 along the length direction. It can be understood that by arranging the chamfers 23 at both ends of the reinforcing rib 20, the position of the wire passing hole 21 can be observed during the wire passing operation. Arranging the chamfers 23 can also change the opening angle of the wire passing hole 21, making it more convenient to put the wire harness into the wire passing hole 21 and providing a routing space for the wire harness to flow out. In addition, by arranging the chamfers 23 on the reinforcing rib 20, a part of both ends of the reinforcing rib 20 is cut off, thereby reducing the weight of the battery module connection structure 100.

[0040] To further fix the wire harness, through holes 22 are also formed at both ends of the reinforcing rib 20 along the length direction. The axis of the through hole 22 is arranged along the width direction. Specifically, after passing the wire harness through the wire passing hole 21, a cable tie can be passed through the through hole 22 to tie the wire harness.

[0041] Please refer toFigure 1 and Figure 2 。In this embodiment, two wing plates 30 are provided at the middle position of the connecting piece 10 along the length direction. The wing plates 30 are fixedly connected to the connecting piece 10 and extend to both sides of the connecting piece 10. It can be understood that the connecting piece 10 and the wing plates 30 form a "cross" structure. In this embodiment, the connecting piece 10 is used to connect the battery modules 203, so that the relative positions of the battery modules 203 are fixed. A copper busbar 204 is connected between the battery modules 203 for electrical connection to connect the battery modules 203 in series. The wing plates 30 are used to support the copper busbar 204.

[0042] In order to fix the copper busbar 204, a copper busbar fixing hole 31 is provided on the wing plate 30. Specifically, in this embodiment, the number of copper busbar fixing holes 31 on one wing plate 30 is two, and they are spaced along the width direction. Specifically, the copper busbar 204 is placed on the wing plate 30 and located between the two copper busbar fixing holes 31. The cable tie is sequentially passed through the two copper busbar fixing holes 31 to fix the copper busbar 204 on the wing plate 30.

[0043] Furthermore, a wire harness fixing hole 32 is provided at one end of the wing plate 30 away from the connecting piece 10. Specifically, in this embodiment, in addition to fixing the wire harness in the wire threading hole 21, the wire harness can also be fixed on the wing plate 30 by passing a cable tie through the wire harness fixing hole 32. It should be noted that in this embodiment, the number of wire harnesses is multiple, and the wire threading hole 21 and the wire harness fixing hole 32 can be used simultaneously. In this embodiment, the number of wire harness fixing holes 32 is two. In other embodiments, the number of wire harness fixing holes 32 can be set as required, and the present utility model does not make any limitation.

[0044] Second Embodiment

[0045] Please refer to Figure 3 , this embodiment provides a battery module connection structure 100. This battery module connection structure 100 is substantially the same as the battery module connection structure 100 in the above first embodiment, except that:

[0046] The battery module connection structure 100 in this embodiment does not include the wing plates 30 and does not have the copper busbar fixing holes 31. In this embodiment, a wire harness fixing hole 32 is provided at the middle position of the connecting piece 10 along the length direction. It can be understood that in this embodiment, by providing the wire harness fixing hole 32 on the connecting piece 10, the wire harness can be fixed to the connecting piece 10 by passing a cable tie through the wire harness fixing hole 32.

[0047] Third Embodiment

[0048] Please refer to Figure 2 and Figure 4, this embodiment provides a battery pack 200, which includes a first module area 201, a second module area 202, and the battery module connection structure 100 provided in the above first embodiment or second embodiment. Both the first module area 201 and the second module area 202 include a plurality of battery modules 203 arranged side by side, and the first module area 201 and the second module area 202 are arranged at intervals. The battery module connection structure 100 is used to connect the first module area 201 and the second module area 202.

[0049] Specifically, the battery pack 200 further includes an upper cover 206 and a base 207, and the upper cover 206 and the base 207 are fastened to form a cavity. The battery module 203 is accommodated in the cavity.

[0050] Further, the battery pack 200 further includes a module connector 205. The module connector 205 is used to connect a plurality of battery modules 203 arranged side by side. It can be understood that the module connector 205 is disposed on a side of the first module area 201 away from the second module area 202 and on a side of the second module area 202 away from the first module area 201.

[0051] The beneficial effects of the battery module connection structure 100 of the battery pack 200 of the present utility model are:

[0052] The battery module connection structure 100 of the battery pack 200 of the present utility model includes a connecting piece 10. Both ends of the connecting piece 10 along its length direction are provided with connection hole groups 11. The connection hole group 11 includes two connection holes 111. The connection holes 111 are arranged at intervals along the width direction of the connecting piece 10. A reinforcing rib 20 is arranged on the connecting piece 10 along the length direction. A wire passing hole 21 is opened in the reinforcing rib 20. The wire passing hole 21 is arranged along the length direction. The battery modules 203 adjacent to one end of the connecting piece 10 are fixedly connected through the connection holes 111. The battery modules 203 arranged at intervals at both ends of the connecting piece 10 are connected through the connecting piece 10. By adding the reinforcing rib 20, the connection strength between the battery modules 203 is improved, and the connection between the battery modules 203 is prevented from being broken due to vibration, ensuring the overall natural frequency of the battery pack 200.

[0053] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery module connection structure, characterized in that: It includes a connecting plate, and both ends of the connecting plate along the length direction are provided with a connecting hole group, the connecting hole group includes at least two connecting holes, the connecting holes are arranged at intervals along the width direction of the connecting plate, and the connecting plate is provided with a reinforcing rib along the length direction, and the reinforcing rib is provided with a threading hole, and the threading hole is arranged along the length direction.

2. The battery module connection structure according to claim 1, characterized in that: Two fin plates are arranged at the middle position of the connecting piece along the length direction. The fin plates are fixedly connected to the connecting piece and extend to both sides of the connecting piece.

3. The battery module connection structure according to claim 2, characterized in that: The fin plate is provided with a copper bar fixing hole.

4. The battery module connection structure according to claim 2, characterized in that: A wire harness fixing hole is formed at one end of the fin plate away from the connecting piece.

5. The battery module connection structure according to claim 1, characterized in that: The connecting piece is provided with a harness fixing hole at a middle position along the length direction.

6. The battery module connection structure according to claim 1, characterized in that: The reinforcing ribs are provided with chamfers at both ends along the length direction.

7. The battery module connection structure according to claim 1, characterized in that: The reinforcing ribs are further provided with through holes at both ends along the length direction, and the axes of the through holes are arranged along the width direction.

8. The battery module connection structure according to claim 1, characterized in that: The connecting hole is a strip-shaped hole arranged along the length direction.

9. A battery pack, characterized in that: It includes a first module area, a second module area and a battery module connection structure as described in any one of claims 1 to 8, wherein the first module area and the second module area each include a plurality of battery modules arranged side by side, the first module area and the second module area are arranged at intervals, and the battery module connection structure is used to connect the first module area and the second module area.

10. The battery pack according to claim 9, characterized in that: It also includes a module connector, which is used to connect multiple battery modules arranged side by side.

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