CN219180711U - Battery module and vehicle - Google Patents

Abstract

The utility model discloses a battery module and a vehicle, comprising: each battery pack comprises a plurality of battery cells which are sequentially overlapped, and an end plate is arranged at the end part of each battery pack; the middle plate is positioned between two adjacent battery packs, the outer plate is positioned at the outer sides of at least two battery packs, and the middle plate and the outer plate are connected with the end plates. According to the battery module of the embodiment of the utility model, the two battery packs are connected on different sides through one middle plate and two outer plates to form the complete battery module. The battery module has the characteristics of small mass and high structural reliability.

Description

Battery module and vehicle

Technical Field

The present disclosure relates to battery manufacturing technology, and particularly to a battery module and a vehicle with the battery module.

Background

Increasing the integration of cells into battery modules and battery systems is an important way to increase the energy density of power battery systems, whereas in the prior art it is an efficient and common way to integrate two or more rows of cells into a single module. That is, mounting plates are arranged on two sides of each row of battery cells in the prior art to protect and fix the battery cells. When the multiple rows of electric cores are actually connected, the mounting plates of the multiple rows of electric cores can be sequentially attached and fixed to form the battery module. However, the battery cells with the structure comprise more mounting plates after being combined to form the battery module, so that the total mass of the battery module is larger, and the space utilization rate inside the battery pack is reduced by a plurality of mounting plates, so that the energy density of the battery pack cannot meet the endurance requirement of a user on the vehicle.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery module that can reduce the weight of the battery module without changing the structural strength of the battery module, thereby improving the energy density of the battery cells.

According to an embodiment of the utility model, a battery module includes: each battery pack comprises a plurality of battery cells which are sequentially overlapped, and an end plate is arranged at the end part of each battery pack; the middle plate is positioned between two adjacent battery packs, the outer plate is positioned at the outer sides of at least two battery packs, and the middle plate and the outer plate are connected with the end plates.

According to the battery module provided by the embodiment of the utility model, the connection is realized on different sides of two battery packs through one middle plate and two outer plates so as to form the complete battery module. The battery module has the characteristics of small mass and high structural reliability.

According to the battery module provided by the embodiment of the utility model, the end part of the middle plate is provided with the extension plate, the extension plate extends between the end plates of the two adjacent battery packs, and the extension plate is fixedly connected with the end plates.

According to the battery module provided by the embodiment of the utility model, the end plate is connected with the extension plate through the riveting piece.

According to the battery module provided by the embodiment of the utility model, the extension plate is provided with the plurality of riveting holes, and the plurality of riveting holes are distributed at intervals in the length direction of the extension plate and are respectively used for penetrating the plurality of riveting pieces.

According to the battery module provided by the embodiment of the utility model, the welding gap is formed between the two end plates, the two end plates are suitable for being welded at the welding gap, and the welding gap is positioned at one end of the extension plate, which is away from the middle plate.

According to the battery module provided by the embodiment of the utility model, the end face of the end plate is provided with the installation sinking groove, and the extension plate extends into the installation sinking groove.

According to the battery module provided by the embodiment of the utility model, the end part of the outer side plate is provided with the connecting flanging, the connecting flanging is bent relative to the outer side plate, and the connecting flanging is welded with the end plate.

According to the battery module provided by the embodiment of the utility model, the side surface of the middle plate is connected with the end surface of the battery cell through structural adhesive.

According to the battery module provided by the embodiment of the utility model, the inner side surface of the outer side plate is connected with the end surface of the battery cell through structural adhesive.

The utility model also provides a battery module,

according to the vehicle of the embodiment of the utility model, the battery module of any one of the above is provided.

The vehicle and the above battery module have the same advantages over the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a structure of a battery module according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of an intermediate plate according to an embodiment of the present utility model;

FIG. 3 is an exploded view of an intermediate plate and an end plate according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of the connection of an intermediate plate to an end plate according to an embodiment of the utility model;

fig. 5 is a schematic illustration of the connection of an intermediate plate to two end plates according to an embodiment of the utility model.

Reference numerals:

the battery module 100 is provided with a battery module,

the battery pack 1, the battery cell 11, the left side 12, the upper side 13, the first end face 14, the end plate 15, the mounting hole 151, the welding slit 152, the welding area 153, the mounting recess 154,

the middle plate 2, the extension plate 21, the riveting hole 211, the clamping area 212,

the outer side plate 3 is connected with the flange 31 and the riveting piece 4.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The front-rear direction in this application is the longitudinal direction of the battery module 100, i.e., the X-direction, unless otherwise specified; the left-right direction is the lateral direction of the battery module 100, i.e., the Y-direction; the up-down direction is the vertical direction of the battery module 100, i.e., the Z-direction.

A battery module 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 5, including: two battery packs 1, an intermediate plate 2 and an outer plate 3. It should be noted that, as shown in fig. 1, each battery pack 1 is composed of a plurality of cells 11 stacked in sequence, and an end plate 15 is provided at an end of each battery pack 1. Specifically, each battery pack 1 has a left side face 12, a right side face, an upper side face 13, a lower side face, a first end face 14, and a second end face. Wherein the left side 12 and the right side face are opposite to each other. The upper side 13 and the lower side face are opposite to each other, the first end face 14 and the second end face are opposite to each other, and the dimensions of the upper side 13 and the lower side face are both larger than the area of the left side face 12 or the right side face.

It is understood that, at the time of actual installation, two battery packs 1 may be installed in parallel to form the battery module 100. Wherein the middle plate 2 is mounted between two battery packs 1, i.e. one side of the middle plate 2 is connected to the left side 12 of one battery pack 1, and the other side of the middle plate 2 is connected to the right side of the other battery pack 1. And, both end portions of the middle plate 2 are connected to both end plates 15 of each battery pack 1, and then the two outer side plates 3 are connected to the outer side surfaces of the two battery packs 1, respectively. Thereby, the complete battery module 100 may be formed.

It is understood that the battery module 100 of the present embodiment uses only one middle plate 2, and the middle plate 2 and the end plate 15 may be used in combination by welding, overlapping, riveting, or the like to achieve stable connection. Therefore, when the battery cell 11 is charged or discharged, the problem of swelling of the side surface of the battery cell 11 caused by the swelling of the battery cell 11 and/or the phenomenon that the connection between the plates is broken after the battery module 100 is subjected to mechanical impact can be avoided. That is, when the middle plate 2, the outer side plate 3, and the end plate 15 are subjected to an expansion force or a mechanical impact, the plate members are broken by a plurality of connection means, and the number of the middle plates 2 is reduced to further increase the installation space and reduce the weight of the battery module 100, thereby being advantageous for increasing the energy density of the battery.

According to the battery module 100 of the embodiment of the utility model, the connection is realized on different sides of the two battery packs 1 through one middle plate 2 and two outer plates 3 to form the complete battery module 100, wherein the stability and the strength of the structure can be improved through various connection processes, and the redundant plate structure is structurally reduced, so that the energy density of the battery module 100 is improved, and meanwhile, the battery module 100 of the embodiment of the utility model also has the characteristics of small mass and high structural reliability.

In some embodiments, the end of the intermediate plate 2 is provided with an extension plate 21, the extension plate 21 extends between the end plates 15 of the adjacent two battery packs 1, and the extension plate 21 is fixedly connected to the end plates 15. It should be noted that, as shown in fig. 2, the middle plate 2 is provided with extension plates 21 at both ends in the Y direction, and the extension plates 21 are configured as strip-shaped plates adapted to the end surface shape of the end plate 15, so that the extension plates 21 are adapted to overlap the end surface of the end plate 15 of the battery pack 1 to improve the connection consistency. Wherein, extension board 21 and intermediate plate 2 accessible integrated into one piece stamping forming makes, so, can guarantee the better quality of intermediate plate 2, and has improved holistic stability.

In some embodiments, the end plate 15 is connected to the extension plate 21 by rivets 4. That is, in the actual installation, the extension plate 21 is aligned with the end face of the end plate 15, and after the two are attached, the end faces of the extension plate 21 and the end plate 15 are sequentially penetrated through the caulking member 4, thereby completing the fixed connection of the extension plate 21 and the end plate 15. It can be appreciated that the connection is more reliable by the riveting process, and has the advantages of simpler installation process and lower cost. Thus, when only one intermediate plate 2 is provided, the problem of weak impact resistance of the intermediate plate 2 can be compensated for by the caulking process. The rivet member 4 in this embodiment may be a flat head rivet for facilitating subsequent welding.

In some embodiments, the extension plate 21 is provided with a plurality of rivet holes 211, and the plurality of rivet holes 211 are spaced apart in the length direction of the extension plate 21 and are respectively used for penetrating the plurality of rivets 4. That is, as shown in fig. 3, a plurality of caulking holes 211 are provided in the extension plate 21 at intervals in the Z direction from top to bottom in order, and the intervals between two adjacent caulking holes 211 are the same. And a plurality of mounting holes 151 are also provided on the end face of the end plate 15 of each battery pack 1, the number and the size of the mounting holes 151 are the same as those of the caulking holes 211, and the layout of the mounting holes 151 on the end face is the same as that of the caulking holes 211 on the extension plate 21. Thus, when the extension plate 21 is attached to the end plate 15 and the mounting hole 151 is aligned with the caulking hole 211, the caulking hole 211 and the mounting hole 151 can be pierced by the caulking 4, thereby connecting the extension plate 21 to the end plate 15.

In some embodiments, a welding gap 152 is formed between the two end plates 15, and the two end plates 15 are adapted to be welded together at the welding gap 152, the welding gap 152 being located at the end of the extension plate 21 facing away from the intermediate plate 2. As shown in fig. 3 and 5, the end surfaces of the end plates 15 are provided with welding slits 152 for welding the two end plates 15 and welding regions 153 for welding the end plates 15 and the extension plates 21. Wherein the area of the welding slit 152 is larger than that of the welding area 153 and the welding area 153 is configured in parallel, and the welding area 153 is disposed near one side of the extension plate 21. And the weld gap 152 is specifically a chamfer at the corner of the end plate 15.

Thus, when the end face caulking of the extension plate 21 and the end plate 15 is completed, the extension plate 21 and the end plates 15 on both sides in the X direction can be welded in the welding area 153, and then the two end plates 15 on both sides in the X direction can be welded in the welding slit 152. Therefore, the battery pack 1 and the middle plate 2, and the battery pack 1 can be further tightly and firmly connected through the process of welding sequentially from inside to outside in the Y direction, so that the overall structural strength and the impact resistance of the battery module 100 are improved.

In some embodiments, end plate 15 has a mounting recess 154 on an end surface thereof, and extension plate 21 extends into mounting recess 154. As shown in fig. 3, an L-shaped boss region is formed in an upper region of the end surface of the end plate 15, an L-shaped boss region is formed in a lower region of the end surface of the end plate 15, the mounting recess 154 is located between the two L-shaped boss regions, and the extension plate 21 is further provided with an adapted engagement region 212 at a position corresponding to the L-shaped boss region. During actual installation, the extension plate 21 extends into the installation countersink 154 to ensure that the end plate 15 and the extension plate 21 are stably connected, and the extension plate 21 is clamped in the installation countersink 154 of the end surface through the two L-shaped boss areas and the clamping area 212 of the extension plate 21.

In some embodiments, the end of the outer panel 3 is provided with a connecting flange 31, the connecting flange 31 being bent relative to the outer panel 3, the connecting flange 31 being welded to the end panel 15. That is, the connection flange 31 is configured as a bent structure near one side of the end plate 15. Specifically, in actual installation, the connecting flange 31 may be overlapped on the side edge of the end plate 15, and then the connecting flange 31 is connected to the end plate 15 by using a welding process, so that tight connection between the outer side plate 3 and the end plate 15 may be achieved.

It should be noted that, the welding processes in the present embodiment and the foregoing embodiments may both use methods such as laser filler wire welding and cold metal transition welding to perform welding, so as to effectively ensure the welding quality of the welded piece.

In some embodiments, the sides of the intermediate plate 2 are connected to the end faces of the cells 11 by structural adhesive. That is, as shown in fig. 1, both end surfaces of the intermediate plate 2 are adhered to the left side surface 12 of one cell 11 and the right side surface of the other cell 11 by structural adhesive. By this, the intermediate plate 2 can be connected with the cells 11 on both sides more compactly by the characteristic of the structural adhesive, and the rigidity of the connection is further enhanced, while the deformability of the intermediate plate 2 is also reduced.

In some embodiments, the inner side of the outer plate 3 is connected to the end face of the cell 11 by structural adhesive. That is, as shown in fig. 1, the inner surfaces of the two outer plates 3 are respectively adhered to the end surfaces of the cells 11 facing away from the intermediate plate 2 by structural adhesive. Therefore, the outer side plate 3 and the battery cell 11 can be tightly connected, deformation of the outer side plate 3 can be reduced through the characteristic of structural adhesive, and the connection rigidity is improved to prevent the outer side plate 3 from cracking.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the battery module 100 of any one of the above is provided. By providing only one intermediate plate 2 between the battery packs 1, the intermediate plate 2 is tightly connected with the end plates 15 of the battery packs 1 using various types of connection processes, thereby improving the connection stability of the intermediate plate 2 with the battery packs 1. Therefore, the weight of the battery module 100 is reduced, and the structural strength is high, so that the battery module 100 can still maintain a stable state without being damaged under the working conditions of mechanical impact or expansion force of the battery cell 11. And, through setting up single and thinner intermediate plate 2, still be favorable to improving the energy density of electric core 11, improve the duration.

1. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

2. In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

3. In the description of the present utility model, "plurality" means two or more.

4. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

5. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery module, comprising:

each battery pack (1) comprises a plurality of battery cells (11) which are sequentially overlapped, and an end plate (15) is arranged at the end part of each battery pack (1);

intermediate plate (2) and lateral plate (3), intermediate plate (2) are located adjacent two between group battery (1), lateral plate (3) are located two at least the outside of group battery (1), just intermediate plate (2) with lateral plate (3) all with end plate (15) link to each other.

2. The battery module according to claim 1, wherein the end of the intermediate plate (2) is provided with an extension plate (21), the extension plate (21) extends between the end plates (15) of the adjacent two battery packs (1), and the extension plate (21) is fixedly connected with the end plates (15).

3. The battery module according to claim 2, wherein the end plate (15) and the extension plate (21) are connected by a rivet (4).

4. A battery module according to claim 3, wherein the extension plate (21) is provided with a plurality of caulking holes (211), and the plurality of caulking holes (211) are spaced apart in the longitudinal direction of the extension plate (21) and are respectively provided for penetrating the plurality of caulking pieces (4).

5. Battery module according to claim 2, characterized in that a welding gap (152) is formed between two end plates (15), and that the two end plates (15) are adapted to be welded together at the welding gap (152), the welding gap (152) being located at the end of the extension plate (21) facing away from the intermediate plate (2).

6. The battery module according to claim 2, wherein a mounting recess (154) is provided on an end surface of the end plate (15), and the extension plate (21) extends into the mounting recess (154).

7. The battery module according to claim 1, wherein the end portion of the outer side plate (3) is provided with a connection flange (31), the connection flange (31) is bent with respect to the outer side plate (3), and the connection flange (31) is welded to the end plate (15).

8. The battery module according to claim 1, characterized in that the side surfaces of the intermediate plate (2) are connected with the end surfaces of the cells (11) by structural adhesive.

9. The battery module according to claim 1, characterized in that the inner side surface of the outer side plate (3) is connected with the end surface of the battery cell (11) by structural adhesive.

10. A vehicle characterized in that the battery module according to any one of claims 1 to 9 is provided.

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