CN220774570U

CN220774570U - Battery pack box, battery pack and vehicle

Info

Publication number: CN220774570U
Application number: CN202322478626.0U
Authority: CN
Inventors: 王磊; 金艳芳
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-04-12
Anticipated expiration: 2033-09-12

Abstract

The utility model provides a battery pack box body, a battery pack and a vehicle. The battery pack box body comprises a box body, wherein the box body is provided with a cavity and an opening communicated with the cavity, and the cavity is used for accommodating a battery module; the liquid cooling plate is arranged in the opening and is connected with the box body; the first reinforcement comprises a first connecting part and a second connecting part, wherein the first connecting part is arranged on the surface of the side wall of the box body, which is away from the cavity, and the second connecting part is arranged on the surface of the liquid cooling plate, which is away from the cavity. According to the battery pack box body, the first reinforcement structure is arranged, so that the strength of the battery pack box body is enhanced, and the column collision resistance of the battery pack is improved.

Description

Battery pack box, battery pack and vehicle

Technical Field

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

Background

With the great trend of advocating low-carbon economy, energy automobiles are gradually rising. The power battery is used as a core power supply part of the energy automobile and is arranged on the chassis of the automobile through a lower box body structure, and the lower box body has the functions of supporting the weight of the whole battery pack, providing mounting points of the battery pack and the whole automobile and protecting the internal safety of the battery.

At present, in order to meet the requirement of light weight of vehicle body parts, the strength of materials adopted by the lower box body is lower, and when a vehicle encounters accidents such as collision, the battery structure is easy to be extruded and damaged, so that the safety problem occurs.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery pack case, a battery pack and a vehicle, so as to improve the strength of the battery pack case and further improve the anti-collision capability.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the battery pack box comprises a box body, wherein the box body is provided with a cavity and an opening communicated with the cavity, and the cavity is used for accommodating a battery module;

the liquid cooling plate is arranged in the opening and is connected with the box body;

the first reinforcement comprises a first connecting part and a second connecting part, wherein the first connecting part is arranged on the surface of the side wall of the box body, which is away from the cavity, and the second connecting part is arranged on the surface of the liquid cooling plate, which is away from the cavity.

Further, the battery pack box body further comprises at least one supporting beam;

the supporting beam is arranged in the cavity along the first direction and/or the second direction, one end of the supporting beam is connected with the side wall, and the other end of the supporting beam is connected with the other opposite side wall;

the first direction is perpendicular to the second direction.

The battery pack case further includes a support beam reinforcement;

the support beam is arranged in the cavity along a first direction and a second direction;

one of the support beams is vertically connected with the other support beam;

the support beam reinforcement is provided with a containing groove, and the support beam is fixed in the containing groove;

one end of the support beam reinforcement is vertically connected to another one of the support beams, and the other end is adjacent to the side wall.

Further, the battery pack box body further comprises a second reinforcing piece and a first fastening piece;

the second reinforcement is provided with a first mounting groove and a first contact part, the support beam is fixed in the first mounting groove near the side wall, and the first contact part is contacted with the surface of the side wall facing the support beam;

the first fastener penetrates through the second reinforcement and the box body, and the second reinforcement is fixedly connected with the box body. Further, the battery pack box body further comprises a third reinforcing piece and a second fastening piece;

the third reinforcement is provided with a second mounting groove and a second contact part, the supporting beam is fixed in the second mounting groove, and the second contact part is contacted with the surface of the other supporting beam facing the side wall;

the second fastener penetrates through the third reinforcing piece and is used for fixedly connecting the third reinforcing piece with the box body.

The support beam stiffener is further provided with at least two third stiffeners;

and one third reinforcing piece is arranged on each of two sides of the joint of one supporting beam and the other supporting beam.

Further, a surface of the support beam, which contacts the second contact portion, is provided with a non-slip protrusion.

Further, the main body of the box body is made of composite materials

Compared with the prior art, the battery pack box body has the following advantages:

according to the battery pack box body, the liquid cooling plate is embedded into the opening of the box body to serve as the box cover plate, and the cavity in the box body is used for accommodating the battery module. The first reinforcement comprises a first connecting part and a second connecting part, wherein the first connecting part is arranged on the outer surface of the side wall of the box body, and the second connecting part is arranged on the upper surface of the liquid cooling plate. According to the specific installation condition, the first connecting portion can be arranged on the side wall of the box body, which faces the side face of the car body and/or faces the front and rear directions of the car body, so that the column collision resistance of the battery pack box body from the side face of the car body or the front and rear directions is improved, namely, the strength of the battery pack box body is enhanced by arranging the first reinforcing piece structure, the column collision resistance of the battery pack is improved, the battery pack structure can be better protected from being damaged when the car encounters an accident of collision, and the safety of the battery is ensured.

Another objective of the present utility model is to provide a battery pack to improve structural strength and thus anti-column collision capability.

a battery pack comprises a battery module and the battery pack box body according to any one of the above embodiments, wherein the battery module is fixed in the cavity.

Compared with the prior art, the battery pack has the same advantages as the battery pack box, and the description is omitted here.

Another object of the present utility model is to provide a vehicle for improving the strength and the anti-collision capability of a battery pack of the vehicle.

a vehicle comprising the battery pack according to the above embodiment.

Compared with the prior art, the vehicle provided by the utility model has the same advantages as the battery pack box body and the battery pack, and the description is omitted herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

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

FIG. 2 is a schematic view of a first stiffener installation position according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a main body structure of a case according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the mounting position of a support beam stiffener according to an embodiment of the present utility model;

FIG. 5 is a schematic view showing the structure of a support beam stiffener according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a second stiffener installation position according to an embodiment of the present utility model;

fig. 7 is a schematic view of a third stiffener installation position according to an embodiment of the present utility model.

Reference numerals illustrate:

1-box body, 11-cavity, 12-opening, 13-side wall, 14-side baffle, 2-liquid cooling plate, 31-first reinforcement, 311-first connection portion, 312-second connection portion, 32-second reinforcement, 321-first mounting groove, 322-first contact portion, 33-third reinforcement, 331-second mounting groove, 332-second contact portion, 34-support beam reinforcement, 341-accommodation groove, 4-support beam, 401-anti-slip protrusion, 402-protrusion, 41-first support beam, 42-second support beam, 51-first fastener, 52-second fastener.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The embodiment of the utility model provides a battery pack box, referring to fig. 1 to 3, the battery pack box comprises a box body 1, wherein the box body 1 is provided with a cavity 11 and an opening 12 communicated with the cavity 11, and the cavity 11 is used for accommodating a battery module; a liquid cooling plate 2, wherein the liquid cooling plate 2 is arranged in the opening 12 and is connected with the box body 1; the first reinforcement 31, the first reinforcement 31 includes a first connection portion 311 and a second connection portion 312, the first connection portion 311 is disposed on a surface of the side wall 13 of the box body 1 facing away from the cavity 11, and the second connection portion 312 is disposed on a surface of the liquid cooling plate 2 facing away from the cavity 11.

Specifically, fig. 1 shows a schematic structural diagram of a battery pack according to an embodiment of the present utility model, and fig. 3 shows a schematic structural diagram of a case body 1 according to an embodiment of the present utility model. The case body 1 includes a side wall 13 and a bottom plate. The two side separation plates 14 are oppositely arranged and are vertically connected with the side wall 13, the extending direction of the side wall 13 is parallel to the X direction, and the extending direction of the side separation plates 14 is parallel to the Y direction. The upper part of the box body 1 is provided with an opening 12 opposite to the bottom plate, namely, the opening direction is upward. The cavity 11 of the case body 1 is used for accommodating a battery module, and the case body 1 is mounted on a chassis of a vehicle body to form a battery pack fixing structure. The liquid cooling plate 2 is fixedly arranged in the opening 12 and is connected with the box body 1, namely, the liquid cooling plate 2 is arranged on the upper portion of the box body 1 and serves as a box top cover, when the battery module is sealed and protected, the working temperature of the battery module is regulated through the liquid cooling medium flowing inside, and the battery module is cooled and insulated, so that the battery module is prevented from being influenced by the fact that the heating temperature of the battery module is too high or the temperature of the battery module is too low in a cold environment. Therefore, the strength and the anti-collision capability of the liquid cooling plate 2 need to be ensured, in addition, in order to meet the requirement of lightening the vehicle parts, the box body 1 is made of a composite material, including but not limited to a thermoplastic composite material, which is light in weight but poor in strength and anti-collision capability, and the first reinforcement 31 is provided to be connected with the box body 1 and the liquid cooling plate 2 in order to improve the strength and the anti-collision capability of the box body 1 and the liquid cooling plate 2.

Specifically, fig. 2 shows a schematic view of the installation position of the first reinforcement member according to the embodiment of the utility model, the first reinforcement member 31 includes a first connection portion 311 and a second connection portion 312, the first connection portion 311 and the second connection portion 312 are vertically connected, and the shapes of the first connection portion 311 and the second connection portion 312 include, but are not limited to, a bar shape or a flat plate shape, i.e., the first reinforcement member 31 is in an "L" shape as a whole. The first connecting portion 311 and the second connecting portion 312 are integrally or separately connected, and the embodiment adopts an integrally connected mode to improve structural strength. The first connection portion 311 is mounted on the outer surface of the side wall 13, and the second connection portion 312 is mounted on the upper surface of the liquid cooling plate 2. The number of the first reinforcing members 31 is not limited in the embodiment of the present utility model, and may be mounted on one of the side walls 13 and the surface of the liquid cooling plate 2, or on two opposite side walls 13 and the surface of the liquid cooling plate 2, or on each of the side walls 13 and the surface of the liquid cooling plate 2. When the first connection part 311 is mounted to the outer surface of the sidewall 13, the first reinforcement 31 may reinforce the column collision resistance of the battery pack case in the Y direction, i.e., the left and right direction of the vehicle body; when the second connecting portion 312 is mounted on the outer surface of the side separator 14, the first reinforcing member 31 can enhance the anti-collision capability of the battery pack case in the X direction, i.e., the front-rear direction of the vehicle body, and the specific arrangement positions and the number are determined according to the requirements. The integral first reinforcement 31 may improve structural strength, and the material of the first reinforcement 31 includes, but is not limited to, steel sheet metal or aluminum alloy.

The battery pack box body provided by the embodiment of the utility model is connected with the side wall 13 of the box body 1 and the liquid cooling plate 2 by arranging the first reinforcing piece 31, so that the strength of the battery pack box body can be enhanced, the column collision resistance of the battery pack is further improved, the structure of the battery pack can be better protected from being damaged when a vehicle encounters an accident such as collision, and the safety of the battery is ensured.

Further, referring to fig. 3, the battery pack case further includes at least one support beam 4; the supporting beam 4 is arranged in the cavity 11 along the first direction and/or the second direction, one end of the supporting beam 4 is connected with the side wall 13, and the other end is connected with the other opposite side wall 13; the first direction is perpendicular to the second direction.

Specifically, as shown in fig. 3, at least one support beam 4 is disposed in the cavity 11 of the battery pack case, and the support beam 4 is disposed in the cavity 11 along a first direction and/or a second direction, wherein the first direction may be inclined or parallel to the front-rear direction of the vehicle body, i.e., the X direction; the second direction may be inclined or parallel to the left-right direction of the vehicle body, i.e., the Y direction. The present embodiment provides for a first direction along the X-direction and a second direction along the Y-direction. Along the X direction and/or the Y direction and parallel to the side wall 13, one end of the supporting beam 4 is connected with the side wall 13, the other end is connected with the other opposite side wall 13, the supporting beam 4 and the box body 1 can be in an integral piece or in a split connection mode, the supporting beam 4 and the box body 1 are arranged as an integral piece according to the embodiment, the strength of the box body 1 can be enhanced, and the extrusion force of external collision to the box body 1 is weakened. When the support beam 4 is provided with a plurality of support beams, the cavity 11 can be divided into a plurality of accommodating spaces, and different battery modules can be respectively placed.

Further, referring to fig. 4 to 7, the battery pack case further includes a support beam reinforcement 34; the support beam 4 is arranged in the cavity 11 along a first direction and a second direction; one of the support beams 4 is vertically connected with the other support beam 4; the support beam reinforcement 34 is provided with a receiving groove 341, and the support beam 4 is fixed in the receiving groove 341; one end of the support beam reinforcement 34 is vertically connected to the other support beam 4, and the other end is adjacent to the side wall 13.

Specifically, fig. 4 shows a schematic view of the installation position of the support beam stiffener 34 according to the embodiment of the present utility model, and fig. 5 shows a schematic view of the structure of the support beam stiffener 34 according to the embodiment of the present utility model, wherein the support beam stiffener 34 is inserted into the upper portion of the support beam 4 through the receiving groove 341, covers the surface of the support beam 4, and improves the strength of the support beam 4. Specifically, the support beam reinforcement 34 may be disposed at the upper portion of the first support beam 41 to enhance the anti-collision capability of the battery pack in the Y direction, or the support beam reinforcement 34 may be disposed at the upper portion of the second support beam 42 to enhance the anti-collision capability of the battery pack in the X direction. The support beam stiffener 34 may be made of a material including, but not limited to, aluminum alloy or steel sheet metal. As shown in fig. 3, the first support beam 41 is disposed in the Y direction, the second support beam 42 is disposed in the X direction, and the first support beam 41 is vertically connected to the second support beam 42. One support beam stiffener 34 may be provided on one support beam 4 or two support beam stiffeners 34 may be provided in sections, with the support beam stiffener 34 being located between the junction of the two support beams 4 and the side wall 13. The support beam stiffener 34 in this embodiment is of a segmented design, i.e. a first support beam 41 is covered with two support beam stiffeners 34, one end of one support beam stiffener 34 being connected to a second support beam 42 and the other end being adjacent to a side wall 13, and one end of the other support beam stiffener 34 being adjacent to the other opposite side wall 13 and the other end being connected to the second support beam 42. And the two sides of the supporting beam are provided with protruding parts 402 for limiting and fixing the supporting beam reinforcing member 34 after the supporting beam reinforcing member 34 is inserted into the upper part of the supporting beam 4, so as to prevent the supporting beam reinforcing member 34 from moving and shaking.

Further, referring to fig. 3 and 6, the battery pack case further includes a second reinforcement 32 and a first fastener 51; the second reinforcement 32 is provided with a first mounting groove 321 and a first contact portion 322, the support beam 4 is fixed in the first mounting groove 321 near the side wall 13, and the first contact portion 322 contacts with the surface of the side wall 13 facing the support beam 4; the first fastening member 51 is disposed between the second reinforcing member 32 and the box body 1, and fixedly connects the second reinforcing member 32 and the box body 1.

Specifically, fig. 6 shows a schematic view of an installation position of the second reinforcement 32 according to the embodiment of the present utility model, and referring to fig. 3, the second reinforcement 32 is fixed between at least one end of the support beam 4 and the side wall 13, specifically, a first installation groove 321 is provided at the top of the second reinforcement 32 to plug and fix the support beam 4, and a first contact portion 322 is provided at the bottom of the second reinforcement 32 to be closely attached to the surface of the side wall 13. The first fastening member 51 is vertically penetrating between the second reinforcing member 32 and the bottom plate of the box body 1 to fix the second reinforcing member 32 on the box body 1, and one, two or more first fastening members 51 may be provided, and in this embodiment, one first fastening member 51 is provided on each side of the junction between the support beam 4 and the side wall 13. The first fastener 51 includes, but is not limited to, a screw, bolt, or pin.

When the battery pack is collided, the second reinforcement 32 bears most of the extrusion force between the support beam 4 and the side wall 13, so that the connection structure of the support beam 4 and the side wall 13 is prevented from being damaged due to collision. According to specific requirements, when the second reinforcement 32 can be arranged between the supporting beam 4 and the side wall 13, the column collision resistance of the battery pack box body along the Y direction, namely the left and right direction of the vehicle body can be enhanced; the second reinforcement 32 can be provided between the support beam 4 and the side separator 14 to enhance the column collision resistance of the battery pack case in the X direction, i.e., the left-right direction of the vehicle body. The shape of the second reinforcement 32 includes, but is not limited to, a bar, a flat plate or a block, and the material includes, but is not limited to, aluminum alloy or steel sheet metal.

Further, referring to fig. 3 and 7, the battery pack case further includes a third reinforcement 33 and a second fastener 52; the third reinforcement 33 is provided with a second installation groove 331 and a second contact portion 332, the support beam 4 is fixed in the second installation groove 331, and the second contact portion 332 contacts with the surface of the other support beam 4 facing the side wall 13; the second fastening member 52 is inserted between the third reinforcement 33, the support beam 4, and the box body 1, and fixedly connects the third reinforcement 33, the support beam 4, and the box body 1.

Specifically, fig. 7 shows a schematic view of the installation position of the third reinforcement member 33 according to the embodiment of the present utility model, where the third reinforcement member 33 is disposed at the connection between the first support beam 41 and the second support beam 42. The third reinforcement 33 has a second installation groove 331 formed at the top thereof to insert and fix the support beam 3, and the second contact portion 332 of the bottom surface of the third reinforcement 33 is closely attached to the surface of the second support beam 42. The third reinforcement 33 improves the connection strength between the first support beam 41 and the second support beam 42, and the strength and collision resistance of the entire battery pack case. The third reinforcing member 33 has a triangular cross section in a direction perpendicular to the liquid cooling plate 2 to improve structural strength. The second fastening member 52 is inserted between the third reinforcement member 33 and the bottom plate of the case body 1 to fix the third reinforcement member 33 to the case body 1.

Further, referring to fig. 7, the number of the third reinforcing members 33 is at least two; one third reinforcing member 33 is provided on each of both sides of the junction of one support beam 4 and the other support beam 4.

Specifically, as shown in fig. 7, one third reinforcing member 33 is provided on each side of the junction of the first supporting beam 41 with the second supporting beam 42, wherein the second contact portion 332 of one third reinforcing member 33 is in contact with the surface of the second supporting beam 42, and the second contact portion 332 of the other third reinforcing member 33 is in contact with the other opposite surface of the second supporting beam 42. The stress is dispersed, and the connection strength between the first support beam 41 and the second support beam 42 is improved.

Further, referring to fig. 7, the surface of the support beam 4 contacting the second contact portion 332 is provided with a non-slip protrusion 401.

Specifically, as shown in fig. 7, the surface of the second support beam 42 contacting the second contact portion 332 of the third reinforcement 33 is provided with a non-slip protrusion 401 to increase the contact friction force of the second support beam 42 and the third reinforcement 33, and to improve the connection strength between the second support beam 42 and the third reinforcement 33.

Specifically, as shown in fig. 6 and 7, in some embodiments, after the support beam stiffener 34 is inserted into the upper portion of the first support beam 41, the second mounting groove 331 of the third stiffener 33 is inserted into the first support beam 41, and the second contact portion 332 is tightly adhered to the surface of the second support beam 42, that is, the third stiffener 33 is fixed to the connection portion between the first support beam 41 and the second support beam 42 by the support beam stiffener 34. Meanwhile, the first mounting groove 321 of the second reinforcement 32 is inserted into the first support beam 41 near the side wall 13, and the first contact portion 322 is tightly attached to the surface of the side wall 13.

The embodiment of the utility model also provides a battery pack, referring to fig. 1, comprising a battery module and the battery pack box body according to any one of the previous embodiments; the battery module is fixed in the cavity 11.

Compared with the prior art, the battery pack provided by the embodiment of the utility model enhances the strength of the box body, improves the column collision resistance of the battery pack, and ensures the operation safety.

The embodiment of the utility model also provides a vehicle, which comprises the battery pack according to any one of the embodiments.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery pack case, comprising:

a case body (1), the case body (1) having a cavity (11), and an opening (12) communicating with the cavity (11), the cavity (11) being for accommodating a battery module;

a liquid cooling plate (2), wherein the liquid cooling plate (2) is arranged in the opening (12);

the first reinforcement (31), first reinforcement (31) include first connecting portion (311) and second connecting portion (312), first connecting portion (311) set up in lateral wall (13) of box main part (1) deviate from cavity (11) surface, second connecting portion (312) set up in liquid cooling board (2) deviate from cavity (11) surface.

2. The battery pack case according to claim 1, wherein the battery pack case further comprises at least one support beam (4);

the supporting beam (4) is arranged in the cavity (11) along a first direction and/or a second direction, one end of the supporting beam (4) is connected with the side wall (13), and the other end is connected with the other opposite side wall (13);

the first direction is perpendicular to the second direction.

3. The battery pack case according to claim 2, further comprising a support beam stiffener (34);

the supporting beam (4) is arranged in the cavity (11) along a first direction and a second direction;

one of the support beams (4) is vertically connected with the other support beam (4);

the support beam reinforcement (34) is provided with a receiving groove (341), and the support beam (4) is fixed in the receiving groove (341);

one end of the support beam reinforcement (34) is vertically connected to the other support beam (4), and the other end is adjacent to the side wall (13).

4. A battery pack case according to claim 3, wherein the battery pack case further comprises a second reinforcement (32) and a first fastener (51);

the second reinforcement (32) is provided with a first mounting groove (321) and a first contact part (322), the supporting beam (4) is fixed in the first mounting groove (321) near the side wall (13), and the first contact part (322) is contacted with the surface of the side wall (13) facing the supporting beam (4);

the first fastener (51) is arranged between the second reinforcement (32) and the box body (1) in a penetrating mode, and the second reinforcement (32) is fixedly connected with the box body (1).

5. A battery pack case according to claim 3, wherein the battery pack case further comprises a third reinforcement (33) and a second fastener (52);

the third reinforcement (33) is provided with a second mounting groove (331) and a second contact part (332), the supporting beam (4) is fixed in the second mounting groove (331), and the second contact part (332) is contacted with the surface of the other supporting beam (4) facing the side wall (13);

the second fastening piece (52) is arranged between the third reinforcing piece (33) and the box body (1) in a penetrating mode, and the third reinforcing piece (33) is fixedly connected with the box body (1).

6. The battery pack case according to claim 5, wherein the number of the third reinforcement members (33) is at least two;

one third reinforcement member (33) is arranged on each of two sides of a joint between one supporting beam (4) and the other supporting beam (4).

7. The battery pack case according to claim 5, wherein a surface of the support beam (4) contacting the second contact portion (332) is provided with a slip preventing protrusion (401).

8. The battery pack case according to claim 1, wherein the case body (1) is made of a composite material.

9. A battery pack, characterized by comprising a battery module and the battery pack case according to any one of claims 1 to 8;

the battery module is fixed in the cavity (11).

10. A vehicle comprising the battery pack of claim 9.