CN219892328U - Battery module, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery module, a battery pack and a vehicle, wherein the battery module comprises a plurality of electric cores and a rigid piece, and the electric cores are arranged in a matrix form in a first direction and a second direction; the rigid piece comprises a side surface connecting part, wherein the side surface connecting part is provided with two connecting surfaces which are oppositely arranged, the side surface connecting part is arranged between two adjacent electric cores in the first direction and/or the second direction, and the two connecting surfaces are connected with the side surfaces of the two adjacent electric cores; wherein the first direction is perpendicular to the second direction. The battery module provided by the embodiment of the utility model has the advantages of high rigidity and the like.

Description

Battery module, battery pack and vehicle

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module, a battery pack and a vehicle.

Background

At present, the battery pack is generally arranged in a positive way of an electric core, a transverse longitudinal beam is required to be arranged in a frame of a battery pack box body to provide strength support, a bottom guard plate is arranged at the bottom of the frame, and an upper cover is used for sealing the upper portion of the frame. In order to improve the energy density of the battery pack and the endurance mileage of the electric vehicle, the battery pack in the related technology adopts the inversion of a battery core, and a transverse longitudinal beam in the frame is cancelled. In the scheme of inverting the battery cells, adjacent battery cells are connected through foam to form a battery module, and the overall rigidity of the battery module is low, so that the overall rigidity of the battery pack is low.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

For this reason, the embodiment of the utility model proposes a battery module to improve the rigidity of the battery module.

The battery module comprises a plurality of electric cores and a rigid piece, wherein the electric cores are arranged in a matrix form in a first direction and a second direction; the rigid piece comprises a side surface connecting part, wherein the side surface connecting part is provided with two connecting surfaces which are oppositely arranged, the side surface connecting part is arranged between two adjacent electric cores in the first direction and/or the second direction, and the two connecting surfaces are respectively connected with the side surfaces of the two adjacent electric cores; wherein the first direction is perpendicular to the second direction.

Optionally, the rigid piece further includes a top surface connection portion, where the top surface connection portion is disposed on top of the electrical core in a third direction and is connected to the top surface of the electrical core; wherein the third direction is perpendicular to the first direction and the second direction.

Optionally, the plurality of cells form a plurality of cell columns sequentially arranged along the first direction, and each cell column comprises a plurality of cells sequentially arranged along the second direction; the side surface connecting parts and the top surface connecting parts extend along the second direction, the side surface connecting parts are arranged between two adjacent battery cell columns in the first direction, and two surfaces of the side surface connecting parts which are oppositely arranged in the first direction form two connecting surfaces.

Optionally, the side surface connecting part is plate-shaped, the thickness direction of the side surface connecting part is consistent with the first direction, and the thickness of the side surface connecting part is 2 mm-5 mm; and/or two adjacent electric cores in the second direction are connected through foam.

Optionally, the top surface connecting part is rod-shaped, and the dimension of the top surface connecting part in the third direction is greater than or equal to 10mm; and/or the battery cell comprises a pole, the pole is arranged on the top surface of the battery cell, and the distance between the top surface connecting part and the pole in the first direction is more than or equal to 5mm.

Optionally, the projection of the rigid piece on a plane perpendicular to the second direction is T-shaped, and the top surface connecting part comprises a first part and a second part which are sequentially arranged along the first direction; the first part and the second part of the same rigid piece are respectively arranged on two sides of the side surface connecting part in the first direction, and the first part and the second part are respectively arranged on the tops of two adjacent battery cell columns.

The embodiment of the utility model also provides a battery pack.

The battery pack comprises a box body and a battery module, wherein the box body is provided with a containing cavity; the battery module is arranged in the accommodating cavity, and the battery module is the battery module in any embodiment.

Optionally, the box body comprises a lower box body and an upper cover, and the upper cover is connected with the lower box body and forms a containing cavity; the lower box body comprises a frame and a bottom guard plate, the upper cover is connected with the upper portion of the frame, the bottom guard plate is connected with the lower portion of the frame, and the top surface connecting portion is connected with the bottom guard plate.

Optionally, the top surface connecting part is connected with the bottom guard plate through a fastener, one side of the bottom guard plate, which is far away from the top surface connecting part, is provided with an avoidance groove, and a part of the fastener is arranged in the avoidance groove; and/or the upper cover is provided with a mounting point; and/or the distance between the bottom guard plate and the battery cell in the third direction is more than or equal to 5mm.

The embodiment of the utility model also provides a vehicle.

The vehicle according to an embodiment of the present utility model includes the battery pack according to any one of the above embodiments.

According to the battery module provided by the embodiment of the utility model, the plurality of battery cells are arranged in the form of the matrix in the first direction and the second direction, the side surface connecting parts of the rigid piece are arranged between the two adjacent battery cells in the first direction and/or the second direction, and the two connecting surfaces of the side surface connecting parts are respectively connected with the side surfaces of the two adjacent battery cells, so that the overall rigidity of the battery module can be effectively improved, and the overall rigidity of a battery pack with the battery module is improved. Specifically, when the side surface connecting part of the rigid member is provided only between two adjacent battery cells in the first direction and is connected with the side surfaces of the battery cells, the side surface connecting part can improve the capability of the battery module to resist elastic deformation in the first direction, namely, improve the rigidity of the battery module in the first direction; when the side surface connecting part of the rigid piece is only arranged between two adjacent battery cells in the second direction and is connected with the side surfaces of the battery cells, the side surface connecting part can improve the elastic deformation resistance of the battery module in the second direction, namely the rigidity of the battery module in the second direction is improved; when the side surface connecting part of the rigid member is arranged between two adjacent electric cores in the first direction and the second direction and is connected with the side surfaces of the electric cores, the side surface connecting part can improve the capability of resisting elastic deformation of the battery module in the first direction and the second direction, namely, the rigidity of the battery module in the first direction and the second direction. Therefore, the battery module provided by the embodiment of the utility model has the advantages of high rigidity and the like.

Drawings

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

Fig. 2 is a schematic view of the structure of an assembly unit of a battery module according to an embodiment of the present utility model.

Fig. 3 is a schematic view of another assembly unit of a battery module according to an embodiment of the present utility model.

Fig. 4 is an exploded structural view of three assembly units of a battery module according to an embodiment of the present utility model.

Fig. 5 is a partial sectional view of a battery module according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a battery pack according to an embodiment of the present utility model.

Fig. 7 is a schematic view illustrating a structure of a battery pack according to another view angle of an embodiment of the present utility model.

Fig. 8 is a schematic view showing an exploded structure of a lower case, a battery module, and an upper cover of a battery pack according to an embodiment of the present utility model.

Fig. 9 is a schematic view showing an exploded structure of a lower case and an upper cover of a battery pack according to an embodiment of the present utility model.

Fig. 10 is a partial cross-sectional view of a battery pack according to an embodiment of the present utility model.

Reference numerals:

100. a battery pack;

1. a battery module; 11. a battery cell; 111. a side surface; 112. a top surface; 12. a rigid member; 121. a side surface connection part; 1211. a connection surface; 122. a top surface connection portion; 1221. a first portion; 1222. a second portion; 13. a pole; 14. a first assembly unit;

2. a lower box body; 21. a frame; 22. a bottom guard board; 221. avoiding the groove;

3. an upper cover; 31. mounting a beam; 311. mounting points;

4. a receiving chamber;

5. a fastener.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1 to 5, a battery module 1 of an embodiment of the present utility model includes a plurality of battery cells 11 and a rigid member 12, the plurality of battery cells 11 being arranged in a matrix in a first direction and a second direction. The rigid member 12 includes a side connecting portion 121, the side connecting portion 121 has two connecting surfaces 1211 disposed opposite to each other, the side connecting portion 121 is disposed between two adjacent cells 11 in the first direction and/or the second direction, and the two connecting surfaces 1211 are respectively connected to the side surfaces 111 of the two adjacent cells 11. Wherein the first direction is perpendicular to the second direction.

The side connection part 121 is disposed between two adjacent cells 11 in the first direction and/or the second direction, and it is understood that the side connection part 121 is disposed only between two adjacent cells 11 in the first direction, and the side connection part 121 is connected to the side 111 of the two adjacent cells 11; alternatively, the side surface connection portion 121 is provided only between two adjacent cells 11 in the second direction, and the side surface connection portion 121 is connected to the side surfaces 111 of the two adjacent cells 11; alternatively, a part of the side connection portion 121 is disposed between two adjacent cells 11 in the first direction and is connected to the side 111 of the two adjacent cells 11, and another part of the side connection portion 121 is disposed between two adjacent cells 11 in the second direction and is connected to the side 111 of the two adjacent cells 11.

In the battery module 1 according to the embodiment of the utility model, the plurality of battery cells 11 are arranged in the form of the matrix in the first direction and the second direction, the side connecting parts 121 of the rigid members 12 are arranged between two adjacent battery cells 11 in the first direction and/or the second direction, and the two connecting surfaces 1211 of the side connecting parts 121 are respectively connected with the side surfaces 111 of the two adjacent battery cells 11, so that the overall rigidity of the battery module 1 can be effectively improved, and the overall rigidity of the battery pack with the battery module 1 can be improved advantageously. Specifically, when the side connection parts 121 of the rigid members 12 are provided only between two adjacent battery cells 11 in the first direction and are connected to the side 111 of the battery cell 11, the side connection parts 121 may improve the ability of the battery module 1 to resist elastic deformation in the first direction, i.e., improve the rigidity of the battery module 1 in the first direction; when the side connection parts 121 of the rigid members 12 are provided only between two adjacent battery cells 11 in the second direction and are connected to the side 111 of the battery cell 11, the side connection parts 121 may improve the ability of the battery module 1 to resist elastic deformation in the second direction, i.e., improve the rigidity of the battery module 1 in the second direction; when the side connection parts 121 of the rigid members 12 are provided between two adjacent battery cells 11 in the first and second directions and are connected to the side 111 of the battery cell 11, the side connection parts 121 may improve the ability of the battery module 1 to resist elastic deformation in the first and second directions, i.e., improve the rigidity of the battery module 1 in the first and second directions.

Therefore, the battery module 1 of the embodiment of the utility model has the advantage of high rigidity and the like.

In some embodiments, as shown in fig. 2-5, the rigid member 12 further includes a top surface connection portion 122, where the top surface connection portion 122 is disposed on top of the cell 11 in a third direction and is connected to the top surface 112 of the cell 11. Wherein the third direction is perpendicular to the first direction and the second direction.

By providing the top surface connection part 122, on the one hand, the top surface connection part 122 can improve the ability of the battery module 1 to resist elastic deformation in the third direction, i.e., improve the rigidity of the battery module 1 in the third direction; on the other hand, the connection area of the rigid member 12 and the battery cell 11 can be increased, thereby improving the connection reliability of the rigid member 12 and the battery cell 11, and being beneficial to improving the reliability of the battery module 1.

Of course, in other embodiments, the rigid member may not have a top connection portion and may have only a side connection portion.

In some embodiments, as shown in fig. 1 to 4, the plurality of battery cells 11 form a plurality of battery cell columns sequentially arranged in the first direction, each battery cell column including a plurality of battery cells 11 sequentially arranged in the second direction. The side surface connecting portion 121 and the top surface connecting portion 122 each extend in the second direction, the side surface connecting portion 121 is disposed between two adjacent cell rows in the first direction, and two surfaces of the side surface connecting portion 121 disposed opposite to each other in the first direction form two connecting surfaces 1211.

In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model will be further described below by taking the example that the first direction coincides with the left-right direction, the second direction coincides with the front-rear direction, and the third direction coincides with the up-down direction. The left-right direction is shown in fig. 1 to 4, and the front-rear direction and the up-down direction are shown in fig. 1 to 5.

The plurality of cell rows are arranged in order in the left-right direction, and the plurality of cells 11 in the same cell row are arranged in order in the front-rear direction. The side connection portions 121 and the top connection portions 122 each extend in the front-rear direction. The side connection part 121 is provided between two cell rows adjacent in the left-right direction, and the left side surface of the side connection part 121 is connected with the side 111 of the cell 11 located at the left side thereof, and the right side surface of the side connection part 121 is connected with the side 111 of the cell 11 located at the right side thereof, i.e., the left side surface and the right side surface of the side connection part 121 form two connection surfaces 1211.

By arranging the side connecting portion 121 to extend along the second direction, and arranging the side connecting portion 121 between two adjacent cell rows in the first direction, the structure of the rigid member 12 is simplified under the condition that the rigidity of the battery module 1 is ensured, the processing and manufacturing of the battery module 1 are facilitated, and the cost of the battery module 1 is reduced.

Optionally, the side connection 121 is bonded to the side 111.

Optionally, two cells 11 adjacent in the second direction are connected by foam.

For example, two adjacent cells 11 in the front-rear direction are connected by foam, that is, any adjacent two cells 11 in the same cell row are connected by foam.

Because the foam has better elastic deformation capability, when the battery cell 11 is expanded and deformed in the charging and discharging process, the foam can be utilized to elastically deform to provide expansion space for the battery cell 11 so as to improve the safety of the battery module 1.

Alternatively, as shown in fig. 2, 4 and 5, the side connection portion 121 has a plate shape, and the thickness direction of the side connection portion 121 coincides with the first direction. The thickness of the side connection portion 121 is 2mm to 5mm. That is, the side connection portion 121 has a dimension in the first direction of 2mm to 5mm.

For example, as shown in fig. 5, the side surface connecting portion 121 has a dimension L1 in the front-rear direction, and L1 is 2mm to 5mm.

Furthermore, it can be understood that the larger the contact area between the side connection parts 121 and the battery cells 11 is, the more advantageous is to improve the rigidity of the battery module 1; and the larger the size of the side connection part 121 in the first direction, the more advantageous is to improve the rigidity of the battery module 1. However, the larger the size of the side connection part 121 in the first direction, the more disadvantageous the reduction in the volume of the battery module 1, and the more disadvantageous the increase in the energy density of the battery module 1.

Thus, by setting the side connection parts 121 to be plate-shaped and setting the size of the side connection parts 121 in the first direction to be 2mm to 5mm, the energy density of the battery module 1 can be effectively ensured while the rigidity of the battery module 1 is large. The plate-like side connection 121 is also advantageous in improving the connection reliability between the rigid member 12 and the battery cell 11.

Of course, in other embodiments, the side connection portion 121 may be formed in other shapes, for example, the side connection portion 121 may be formed in a frame structure, or the side connection portion 121 may be formed in a block shape.

Alternatively, the side connection part 121 and the top connection part 122 are integrally formed.

For example, the rigid member 12 is a continuous fiberglass pultruded composite profile.

Alternatively, as shown in fig. 2 to 5, the battery cell 11 includes a terminal 13, and the terminal 13 is disposed on the top surface 112 of the battery cell 11. A pitch between the top surface connection portion 122 and the pole 13 in the first direction is 5mm or more, that is, a pitch between the top surface connection portion 122 and the pole 13 in the left-right direction is 5mm or more.

For example, as shown in fig. 5, the pitch between the top surface connection portion 122 and the pole 13 in the front-rear direction is L2, and L2 is 5mm or more.

It will be appreciated that the smaller the spacing between the top connection 122 and the pole 13, the less detrimental to the safety of the cell 11, and in particular when the rigid member 12 is a metal member, the more should be kept a safe distance from the pole 13. By setting the pitch between the top surface connection part 122 and the pole 13 in the first direction to 5mm or more, the safety of the battery cell 11 is facilitated to be improved, and thus the safety of the battery module 1 is facilitated to be improved.

Of course, in other embodiments, the space between the top surface connection portion 122 and the pole 13 in the first direction may be smaller than 5mm, and the rigid member 12 is made of a non-conductive material.

Alternatively, as shown in fig. 2 to 4, the top surface connecting portion 122 has a rod shape, and the dimension of the top surface connecting portion 122 in the third direction is 10mm or more, that is, the dimension of the top surface connecting portion 122 in the up-down direction is 10mm or more.

For example, as shown in fig. 5, the top surface connecting portion 122 has a dimension L3 in the up-down direction, and L3 is 10mm or more.

The larger the size of the top surface connecting part 122 in the third direction, the more advantageous is to improve the rigidity of the battery module 1. By setting the dimension of the top surface connection part 122 in the third direction to 10mm or more, the rigidity of the battery module 1 can be effectively improved.

Alternatively, as shown in fig. 3 and 5, the rigid member 12 has a T-shape in projection on a plane perpendicular to the second direction, and the top surface connecting portion 122 includes a first portion 1221 and a second portion 1222 arranged in order along the first direction. The first portion 1221 and the second portion 1222 of the same rigid element 12 are respectively disposed on two sides of the side connection portion 121 in the first direction, and the first portion 1221 and the second portion 1222 are respectively disposed on top of two adjacent cell rows.

For example, as shown in fig. 5, the first portion 1221 is disposed on the front side of the second portion 1222, the first portion 1221 is disposed on the top of the cell array located on the front side of the side connection 121 and connected to the top surface 112 of the cell 11 in the cell array, and the second portion 1222 is disposed on the top of the cell array located on the rear side of the side connection 121 and connected to the top surface 112 of the cell 11 in the cell array.

Therefore, the two battery cell rows arranged on both sides of the side connecting part 121 in the first direction can be connected through the top connecting part 122, which is beneficial to further improving the rigidity of the battery module 1 and the connection reliability of the battery cells 11 and the rigid members 12.

Of course, in other embodiments, the top surface connection portion 122 may be disposed on top of only one cell row, where the top surface connection portion 122 is connected to the top surface 112 of the cell 11 in only one cell row.

Optionally, top surface attachment portion 122 is bonded to top surface 112.

The method for assembling the battery module 1 of the embodiment of the utility model comprises the following steps:

arranging and connecting a plurality of electric cores in sequence along the front-back direction to form an electric core row, wherein the left side and the right side of the electric core row are respectively connected with a rigid piece 12, and the electric core row and the two rigid pieces 12 connected with the electric core row form a first assembly unit 14; the left and right sides of a rigid member 12 are respectively connected with the battery cells 11, so that the left and right sides of the rigid member 12 respectively form a battery cell array, and the rigid member 12 and the two battery cell arrays connected with the same form a second assembly unit 15; after that, the above-described first and second mounting units 14 and 15 are alternately arranged and connected in the left-right direction, forming one battery module 1.

As shown in fig. 6 to 10, the battery pack according to the embodiment of the utility model includes a case and a battery module 1, the case has a housing cavity 4, the battery module 1 is disposed in the housing cavity 4, and the battery module 1 is the battery module 1 according to any of the embodiments.

Since the battery module 1 of the embodiment of the utility model has the advantage of high rigidity and the like, the battery pack 100 of the embodiment of the utility model has the advantage of high rigidity and the like.

As shown in fig. 6, 8, 9 and 10, the case includes a lower case 2 and an upper cover 3, and the upper cover 3 is connected to the lower case 2 and forms the accommodation chamber 4. Wherein, the lower case 2 includes a bottom guard plate 22, the bottom guard plate 22 is disposed closer to the top surface connecting portion 122 than the upper cover 3 in the third direction, and the top surface connecting portion 122 is connected to the bottom guard plate 22.

For example, the lower case 2 includes a frame 21 and a bottom cover 22, the upper cover 3 is coupled to an upper portion of the frame 21, the bottom cover 22 is coupled to a lower portion of the frame 21, and the upper cover 3, the frame 21, and the bottom cover 22 enclose the accommodation chamber 4. The top surface connecting portion 122 is disposed at the lower side of the battery cell 11, and the top surface connecting portion 122 is connected to the bottom guard plate 22.

In the battery pack 100 of the embodiment of the present utility model, the top surface connecting portion 122 is provided, and the top surface connecting portion 122 is connected with the bottom guard plate 22, so that the connection between the battery module 1 and the bottom guard plate 22 can be achieved, thereby improving the overall mode of the battery pack 100, reducing the amplitude of the battery pack 100, and improving the overall performance of the battery pack 100.

Alternatively, as shown in fig. 10, the distance between the bottom guard plate 22 and the battery cell 11 in the third direction is 5mm or more.

For example, as shown in fig. 10, the vertical distance between the bottom guard 22 and the terminal 13 of the cell 11 is L4, and L4 is 5mm or more.

It is understood that when the bottom guard 22 collides, deformation is easily generated, and by setting the distance between the bottom guard 22 and the battery cell 11 in the third direction to be 5mm or more, the bottom guard 22 can be prevented from directly contacting the battery cell 11 to collide with the battery cell 11 when the bottom guard 22 is deformed, thereby being beneficial to improving the safety of the battery pack 100.

Alternatively, as shown in fig. 7 to 10, the top surface connecting portion 122 is connected to the bottom guard plate 22 through the fastener 5, a side of the bottom guard plate 22 away from the top surface connecting portion 122 is provided with a relief groove 221, and a part of the fastener 5 is disposed in the relief groove 221.

For example, the bottom guard plate 22 is provided with a connecting hole, the top surface connecting part 122 is provided with a threaded blind hole, the top surface connecting part 122 and the bottom guard plate 22 are connected through a stud penetrating through the connecting hole and connected with the threaded blind hole, and the stud head is located in the avoidance groove 221. Wherein, the stud is generally an M5 stud.

Alternatively, the battery module 1 is adhered to the frame 21.

Alternatively, the battery module 1 is adhered to the upper cover 3.

Alternatively, as shown in fig. 6, at least one of the upper cover 3 and the frame 21 is provided with a mounting point 311, and the mounting point 311 is used for mounting and fixing the battery pack 100.

At least one of the upper cover 3 and the frame 21 is provided with a mounting point 311, which can be understood as: mounting points 311 are arranged on the upper cover 3, and mounting points 311 are not arranged on the frame 21; alternatively, mounting points 311 are not provided on the upper cover 3, and mounting points 311 are provided on the frame 21; alternatively, mounting points 311 are provided on both the upper cover 3 and the frame 21.

For example, as shown in fig. 6, three rows of mounting points 311 are provided on the upper cover 3, two rows of mounting points are provided on the frame 21, and the mounting points on the upper cover 3 and the frame 21 are used for connection with the vehicle body.

In the related art, the mounting points of the battery pack are arranged on the frame, and the battery pack 100 in the embodiment of the utility model ensures that the combination of the battery pack 100 and the vehicle body is tighter by arranging the mounting points on the upper cover 3 and the frame 21, the mounting points 311 on the upper cover 3 are used for transferring force between the battery pack 100 and the vehicle body, the mode of the battery pack and the NVH and durability of the whole vehicle are further improved, and the mounting points on the frame 21 are used for the side column collision force of the vehicle body to the battery pack 100 and are transferred to the frame 21 of the lower box body 2 by the threshold beam.

Alternatively, as shown in fig. 6, a mounting beam 31 is provided on the upper cover 3, and a mounting point 311 is provided on the mounting beam 31. The mounting beam 31 is formed by stamping an aluminum plate with the thickness of more than or equal to 2.5 mm.

Alternatively, the bottom guard plate 22 is stamped from high strength steel, and the wall thickness of the bottom guard plate 22 is 0.8 mm-1.2 mm.

For example, the material of the bottom shield 22 is DP590.

Optionally, the bottom guard 22 is bolted to the frame 21.

According to the battery pack 100 disclosed by the embodiment of the utility model, the battery module 1 is adhered to the upper cover 3 of the box body to play a main force transmission path, and as an important characteristic of an inverted battery cell scheme, the bottom guard plate 22 is not adhered and restrained with the battery module 1, but is fixed with the rigid piece 12 of the battery module 1 by a stud, so that the battery pack 100 is reinforced, the battery module 1 clamps the battery pack 100 up and down in the box body, the rigidity of the battery pack 100 is higher, and the mechanical property of the battery pack 100 is improved. In addition, the bottom guard plate 22 is connected with the battery module 1, so that the constraint mode of the bottom guard plate 22 is improved, and the problem of abnormal sound caused by large amplitude of the bottom guard plate 22 is solved.

The vehicle of the embodiment of the utility model includes the battery pack 100 of any of the embodiments described above. The vehicle can be a pure battery vehicle or an oil-electricity hybrid vehicle.

Since the battery pack 100 of the embodiment of the utility model has the advantages of high rigidity and the like, the vehicle of the embodiment of the utility model has the advantages of good safety and the like.

Alternatively, the battery pack 100 is connected to the body of the vehicle through the mount point 311. For example, the mounting points 311 are connected with the vehicle body through press-riveting studs. Wherein, the stud is generally M10 specification, and the strength is not lower than 10.9 grade.

While embodiments of the present utility model have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those skilled in the art without departing from the scope of the utility model.

Claims (10)

1. A battery module, comprising:

the battery cells are arranged in a matrix form in the first direction and the second direction; and

the rigid piece comprises a side surface connecting part, wherein the side surface connecting part is provided with two connecting surfaces which are oppositely arranged, the side surface connecting part is arranged between two adjacent electric cores in the first direction and/or the second direction, and the two connecting surfaces are respectively connected with the side surfaces of the two adjacent electric cores;

wherein the first direction is perpendicular to the second direction.

2. The battery module according to claim 1, wherein the rigid member further comprises a top surface connection part provided at the top of the battery cell in a third direction and connected to the top surface of the battery cell;

wherein the third direction is perpendicular to the first direction and the second direction.

3. The battery module according to claim 2, wherein a plurality of the cells form a plurality of cell rows arranged in sequence along the first direction, each cell row including a plurality of the cells arranged in sequence along the second direction;

the side surface connecting parts and the top surface connecting parts extend along the second direction, the side surface connecting parts are arranged between two adjacent battery cell columns in the first direction, and two surfaces of the side surface connecting parts which are oppositely arranged in the first direction form two connecting surfaces.

4. The battery module according to claim 3, wherein the side connection parts have a plate shape, a thickness direction of the side connection parts coincides with the first direction, and a thickness of the side connection parts is 2mm to 5mm; and/or

And two adjacent electric cores in the second direction are connected through foam.

5. The battery module according to claim 3, wherein the top surface connecting portion has a rod shape, and a dimension of the top surface connecting portion in the third direction is 10mm or more; and/or

The battery cell comprises a pole, the pole is arranged on the top surface of the battery cell, and the distance between the top surface connecting part and the pole in the first direction is more than or equal to 5mm.

6. The battery module according to claim 3, wherein the rigid member has a T-shape in projection on a plane perpendicular to the second direction, and the top surface connecting portion includes a first portion and a second portion arranged in order along the first direction;

the first part and the second part of the same rigid piece are respectively arranged on two sides of the side surface connecting part in the first direction, and the first part and the second part are respectively arranged on the tops of two adjacent battery cell columns.

7. A battery pack, comprising:

the box body is provided with a containing cavity; and

a battery module, the battery module is arranged in the accommodating cavity, and the battery module is the battery module of any one of claims 1-6.

8. A battery pack, comprising:

the box body comprises a lower box body and an upper cover, and the upper cover is connected with the lower box body and forms a containing cavity; and

a battery module, the battery module is arranged in the accommodating cavity, and the battery module is the battery module of any one of claims 2-6;

the lower box body comprises a frame and a bottom guard plate, the upper cover is connected with the upper portion of the frame, the bottom guard plate is connected with the lower portion of the frame, and the top surface connecting portion is connected with the bottom guard plate.

9. The battery pack according to claim 8, wherein the top surface connecting part and the bottom guard plate are connected through a fastener, a side, away from the top surface connecting part, of the bottom guard plate is provided with a avoidance groove, and a part of the fastener is arranged in the avoidance groove; and/or

The upper cover is provided with mounting points; and/or

And the distance between the bottom guard plate and the battery cell in the third direction is more than or equal to 5mm.

10. A vehicle comprising the battery pack of any one of claims 7-9.