CN220065907U

CN220065907U - Battery pack box, battery pack and vehicle

Info

Publication number: CN220065907U
Application number: CN202321698824.1U
Authority: CN
Inventors: 卢鑫; 赵明明
Original assignee: Jidu Technology Wuhan Co ltd
Current assignee: Jidu Technology Wuhan Co ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-11-21
Anticipated expiration: 2033-06-29

Abstract

The utility model relates to the technical field of automobiles and discloses a battery pack box body, a battery pack and a vehicle, wherein a first connecting part is arranged at the bottom of a side beam of the battery pack box body, at least one retracting part is arranged on the first connecting part, a bottom guard plate is arranged opposite to the side beam and is provided with a second connecting part, a protruding part matched with the retracting part is arranged on the second connecting part, an accommodating space is formed between the side beam and the bottom guard plate, a connecting piece is arranged at the front end position of the protruding part in the extending direction, a heat exchange plate accommodating groove is arranged in the retracting part and is positioned at the upper side of the protruding part, and a heat exchange plate is arranged in the heat exchange plate accommodating groove.

Description

Battery pack box, battery pack and vehicle

Technical Field

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

Background

In the course of assembly of structures, it is often the case that a stable connection of two structures is required.

Taking a new energy vehicle as an example, the battery pack is used as a core component of the new energy vehicle and is responsible for storing and releasing energy to provide power for the vehicle, wherein the battery pack box body is used for installing a battery and can play roles of supporting, resisting mechanical impact, preventing mechanical vibration, preventing water and preventing dust.

As shown in fig. 8, in the prior art, the battery pack structure is mainly composed of a transverse beam, a bottom plate 1a and an edge beam 2a, and a liquid cooling plate 3a is arranged in the battery pack to cool the battery, in order to fix the liquid cooling plate 3a in the battery pack on the edge beam 2a, a boss 21a is usually arranged on one side of the edge beam 2a, which faces the battery, and the liquid cooling plate 3a is mounted on the boss 21a by adopting a hot-melt self-tapping Screw (FDS) process, and then the battery is mounted on the liquid cooling plate 3a, and because the boss 21a is arranged on the edge beam 2a, the boss 21a occupies the volume of the battery pack accommodating space 4a, so that the battery pack accommodating space 4a is reduced, thereby limiting the arrangement and mounting of the battery.

Disclosure of Invention

In view of the above, the utility model provides a battery pack case, a battery pack and a vehicle, which are used for solving the problem that the installation and arrangement of batteries are limited due to the fact that the boss is arranged on the side beam in the prior art.

In a first aspect, the present utility model provides a battery pack case comprising:

the side beam is provided with a first connecting part at the bottom, and at least one retracting part is arranged on the first connecting part;

the bottom guard plate is arranged stably relative to the side beam, a second connecting part is arranged at a position, corresponding to one side of the first connecting part, of the bottom guard plate, a protruding part matched with the retracting part is arranged on the second connecting part, and an accommodating space suitable for accommodating a battery is formed between the side beam and the bottom guard plate;

a heat exchange plate accommodating groove provided in the indented portion and located at an upper side of the protruding portion;

and the heat exchange plate is arranged in the heat exchange plate accommodating groove.

Through being provided with at least one indentation portion on the first connecting portion of boundary beam, be provided with on the second connecting portion of backplate at the bottom with indentation portion matched with bulge, after bulge is connected with the connecting piece for the indentation portion, no other spacing portion occupies in the accommodation space that forms between backplate at the bottom and the boundary beam, can not reduce accommodation space's volume, thereby be favorable to arranging and installing of battery in accommodation space, accommodation space inner wall is more even simultaneously, can not cause the extrusion to the battery under the operating mode such as collision, the security of battery package box has been improved, set up the indentation portion in the boundary beam bottom, install the bulge on the backplate at the bottom in the indentation portion of boundary beam, the accommodation space that forms between messenger's boundary beam and the backplate is bigger, thereby can install bigger size battery in accommodation space.

In an alternative embodiment, the indentation is welded to the projection.

In an alternative embodiment, a first heat insulation structure is further disposed in the heat exchange plate accommodating groove, and the first heat insulation structure is disposed at the periphery of the heat exchange plate and is used for limiting heat exchange between the heat exchange plate and the outside.

Through setting up first heat insulation structure in the heat exchange plate holding tank to with first heat insulation structure setting at the periphery of heat exchange plate, reducible heat exchange between heat exchange plate and boundary beam and the backplate at the bottom reduces the influence of external environment temperature to the heat exchange plate, and then has improved the heat transfer performance of heat exchange plate.

In an alternative embodiment, the side of the first insulation structure facing the receiving space is provided with an opening adapted for mounting the heat exchanger plate.

In an optional embodiment, the first heat insulation structure is provided with a limiting part, the limiting part is located at the outer side of the heat exchange plate accommodating groove and extends towards a direction away from the heat exchange plate accommodating groove, and the limiting part is abutted to the side beam and used for limiting the first heat insulation structure to excessively enter the heat exchange plate accommodating groove.

When overhauling and maintaining, the spacing portion that sets up on the first thermal-insulated structure is convenient for take out first thermal-insulated structure from the heat exchanger plate holding tank, has simple structure, convenient operation's advantage.

In an alternative embodiment, a mounting groove is formed in the top of the first heat insulation structure, and an adhesive portion is disposed in the mounting groove. By arranging the adhesive part in the mounting groove, the first structure can be more firmly connected with the side beam.

In an alternative embodiment, the battery pack case further includes:

the second heat insulation structure is positioned in the first heat insulation structure and is arranged between the heat exchange plate and the first heat insulation structure.

In an alternative embodiment, the first insulation structure has a hardness that is greater than the hardness of the second insulation structure.

Through setting up the second thermal-insulated structure between first thermal-insulated structure and heat exchange plate, reducible heat exchange between heat exchange plate and the first thermal-exchange structure reduces the influence of external environment temperature to the heat exchange plate, and then has improved the heat transfer performance of heat exchange plate.

In an alternative embodiment, the cross-sectional dimension of the bottom guard plate on the side far away from the first connecting portion is smaller than the cross-sectional dimension of the bottom guard plate on the side close to the first connecting portion, and a buffer member is arranged in a region of the bottom guard plate on the side far away from the first connecting portion and below the heat exchange plate.

Through setting up the bolster in the region of connecting piece one side is kept away from to the heat exchanger plate below, can play the buffering guard action to the heat exchanger plate, avoid the vehicle to vibrate in the traveling and make producing between heat exchanger plate and the end backplate and strike the damage heat exchanger plate.

In a second aspect, the present utility model also provides a battery pack comprising:

the battery pack case; the method comprises the steps of,

and the battery is arranged in the accommodating space of the battery pack box body.

In a third aspect, the present utility model also provides a vehicle comprising:

the battery pack described above.

In an alternative embodiment, the battery pack is disposed at a bottom location of the vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of the heat exchanger plate receiving slot of FIG. 2;

FIG. 4 is a schematic view of the side rail and bottom shield of FIG. 1;

fig. 5 is a schematic structural view of a side rail in a battery pack case according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a middle bottom guard plate of a battery pack case according to an embodiment of the present utility model;

fig. 7 is a schematic structural view of a first heat insulation structure in a battery pack case according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of a prior art battery pack case in the background of the utility model.

Reference numerals illustrate:

1. edge beams; 101. a first connection portion; 102. a retracting part; 103. a heat exchange plate accommodating groove;

2. a bottom guard board; 201. a second connecting portion; 202. a protruding portion; 203. a connecting piece;

3. an accommodation space;

4. a heat exchange plate;

5. a first insulating structure; 501. a limit part; 502. a mounting groove;

6. an adhesive portion;

7. a second insulating structure;

8. and a buffer member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 8, in the related art, a hot-melt self-tapping Screw (FDS) process is adopted to mount the liquid cooling plate 3a on the boss 21a, and then the battery is mounted on the liquid cooling plate 3a, the boss 21a not only occupies the volume of the battery pack accommodating space 4a, so that the battery pack accommodating space 4a is reduced, the arrangement and the mounting of the larger-sized battery are limited, but also the protruding boss 21a easily extrudes the battery to damage the battery in the working conditions such as collision, and the safety risk is generated.

Meanwhile, the battery pack structure and the liquid cooling plate 3a are made of metal materials, the hot-melt tapping screw is usually made of steel materials and is a good conductor of heat with the liquid cooling plate 3a, and after the battery pack structure and the liquid cooling plate 3a are installed by adopting a hot-melt tapping screw process, the temperature of the external environment is easy to exchange heat with the heat conductor structures, so that the heat exchange effect of the liquid cooling plate 3a is affected.

Embodiments of the present utility model are described below with reference to fig. 1 to 7.

According to an embodiment of the present utility model, in one aspect, as shown in fig. 1 to 4, there is provided a battery pack case which is itself installed in a vehicle for performing a receiving and cooling operation of a battery, and as shown in fig. 1, the battery pack case includes a side sill 1, a bottom cover 2, a heat exchange plate receiving groove 103 and a heat exchange plate 4, the bottom of the side sill 1 is provided with a first connection part 101, the bottom cover 2 is stably disposed opposite the side sill 1, a portion of the bottom cover 2 corresponding to a side toward the first connection part 101 is provided with a second connection part 201, the first connection part 101 is provided with at least one indented part 102, the second connection part 201 is provided with a protruding part 202 cooperating with the indented part 102, a receiving space 3 adapted to receive the battery is formed between the side sill 1 and the bottom cover 2, the heat exchange plate receiving groove 103 is disposed in the indented part 102 and is located at an upper side of the protruding part 202, and the heat exchange plate 4 is disposed in the heat exchange plate receiving groove 103.

Through being provided with at least one indentation portion 102 on the first connecting portion 101 of boundary beam 1, be provided with on the second connecting portion 201 of end backplate 2 with indentation portion 102 matched with bulge 202, after bulge 202 is connected with indentation portion 102 with connecting piece 203, no other spacing portion occupies in the accommodation space 3 that forms between end backplate 2 and the boundary beam 1, can not reduce accommodation space 3's volume, thereby be favorable to arranging and installing of battery in accommodation space 3, accommodation space 3 inner wall is more even simultaneously, can not cause the extrusion to the battery under the operating mode such as collision, improved the security of battery package box.

In this embodiment, the heat exchange plate 4 is used to realize the cooling operation of the battery located on the heat exchange plate, the heat exchange plate 4 is a structural member with a runner inside, and the heat in the battery placed on the heat exchange plate 4 is transferred or heated by the liquid flow by utilizing the characteristic of larger heat exchange coefficient of the liquid flow in the runner. In other not shown embodiments, the heat exchanger plate 4 may also be a liquid cooled plate for cooling only or an electric plate for heating only. The heat exchanger plate 4 may be provided with a cooling medium commonly used, such as cooling water, cooling oil, or a refrigerant.

Specifically, the material of the heat exchange plate 4 is not limited, so long as a stable flow channel structure can be formed inside, the heat exchange plate can be made of metal, hard plastic or other materials, as an implementation mode, the heat exchange plate 4 can be made of three series of aluminum alloys with high ductility and low strength, preferably 3003-O type aluminum alloy, the aluminum alloy has high strength, and meanwhile, the heat exchange plate has good heat dissipation performance, and heat of a battery can be ensured to be absorbed by the heat exchange plate 4 in time so as to improve the cooling effect.

In this embodiment, to reduce the weight of the battery pack case, the side rail 1 and the bottom guard plate 2 may be formed as a hollow structure having a plurality of cavities therein. The materials of the side beam 1 and the bottom guard plate 2 are not limited, and as an implementation mode, the side beam 1 is preferably made of six-system aluminum alloy, has lighter weight and better strength, and can play a good framework effect.

In other embodiments, when the side rail 1 and the bottom guard plate 2 are mounted on the frame at the bottom of the vehicle body, the side rail 1 and the bottom guard plate 2 may both be connected to the frame, and the side rail 1 and the bottom guard plate 2 may not be fixedly connected.

In one embodiment, as shown in fig. 1 to 6, the bottom of the side rail 1 is provided with a retracting portion 102, and the bottom guard plate 2 is provided with a protruding portion 202, and the retracting portion 102 and the protruding portion 202 extend to the left in the drawing as viewed in fig. 1. By providing the indented portion 102 at the bottom of the side sill 1, the protruding portion 202 on the bottom guard plate 2 is installed in the indented portion 102 of the side sill 1, so that the accommodation space 3 formed between the side sill 1 and the bottom guard plate 2 is larger, and thus a larger-sized battery can be installed in the accommodation space 3.

In one embodiment, the connecting member 203 is disposed at a front end position of the extension direction of the protrusion 202, for connecting the indentation 102 and the protrusion 202.

Further, the present embodiment does not limit the configuration of the connector 203 itself, as long as the connection operation can be realized. In one embodiment, the connecting member 203 is a welded portion, that is, the indented portion 102 is welded to the protruding portion 202, so that the connection strength between the side sill 1 and the bottom fender 2 is improved. Specifically, in the present embodiment, the welding portion may connect the protruding portion 202 and the recessed portion 102 using a friction stir welding process.

In another embodiment, the connection 203 is a hot-melt self-tapping Screw (FDS) process, which may be used to connect the protrusion 202 with the indentation 102.

Specifically, the protruding portion 202 and the indented portion 102 may be connected in the length direction of the bottom shielding plate 2 or the bottom shielding plate 2, the heat exchange plate 4 and the side sill 1 in the height direction of the bottom shielding plate 2 by using a hot-melt self-tapping Screw (FDS) process. Specifically, as shown in fig. 2, when the connecting member 203 is a hot-melt self-tapping screw, the extending direction thereof is from right to left, the tip of the screw is located at the left side in the drawing, and the screw passes through the second connecting portion 201 and the first connecting portion 101 at the same time.

It should be noted that, in the present embodiment, the connection member 203 is disposed at a portion where the protruding portion 202 is connected to the retracting portion 102, and as shown in fig. 2, the connection member 203 acts at a left side position of the second connection portion 201. The above arrangement mode does not assemble the screws in a bottom-up mode, and aims to avoid the upward installation of the screws, damage the heat exchange plate 4 above and influence the normal cooling effect of the heat exchange plate 4.

In other embodiments, the connection 203 may be a lock rivet (SPR) or resistance spot welding, which may be performed with a smoother and stronger connection surface than a hot melt Self-tapping screw process.

In one embodiment, as shown in fig. 1 and 2, a first heat insulation structure 5 is further disposed in the heat exchange plate receiving groove 103, and the first heat insulation structure 5 is disposed at the periphery of the heat exchange plate 4 to limit heat exchange between the heat exchange plate 4 and the outside.

Specifically, in this embodiment, the first heat insulation structure 5 has a "C" structure, as shown in fig. 2, an opening is disposed on a side of the first heat insulation structure 5 facing the accommodating space 3, and the opening is adapted to mount the heat exchange plate 4, where the first heat insulation structure 5 may be made of a polymer material.

Through setting up first heat insulation structure 5 in heat transfer board holding tank 103 to set up first heat insulation structure 5 in the periphery of heat transfer board 4, reducible heat exchange between heat transfer board 4 and boundary beam 1 and the backplate 2, reduce the influence of external environment temperature to heat transfer board 4, and then improved the heat transfer performance of heat transfer board 4.

In one embodiment, as shown in fig. 2 and 7, the first heat insulation structure 5 is provided with a limiting portion 501, where the limiting portion 501 is located outside the heat exchange plate accommodating groove 103 and extends in a direction away from the heat exchange plate accommodating groove 103, and the limiting portion 501 abuts against the boundary beam 1 to limit the first heat insulation structure 5 from excessively entering the heat exchange plate accommodating groove 103.

Under the visual angle as shown in fig. 2, the spacing portion 501 extends upwards, and its position that can be connected with the first thermal insulation structure 5 is the perpendicular form setting, and heat transfer board 4 enters into accommodation space 3 from right left and realizes the assembly, and spacing portion 501 that sets up on the first thermal insulation structure 5 can play the supporting role, avoids heat transfer board 4 to take place to warp when the extrusion of first structure and shrink into heat transfer board holding tank 103, when carrying out maintenance, spacing portion 501 is convenient for take out first thermal insulation structure 5 from heat transfer board holding tank 103, has simple structure, convenient operation's advantage.

In one embodiment, as shown in fig. 2 and 7, the top of the first heat insulation structure 5 is provided with a mounting groove 502, the plane of the mounting groove 502 is lower than the plane of the two side areas, so that a concave structure is formed, and an adhesive part 6 is arranged in the mounting groove 502.

Specifically, the adhesive portion 6 in this embodiment is a structural adhesive. Through setting up the viscidity portion 6 in mounting groove 502, can make first heat-proof structure 5 and boundary beam 1 be connected more firm, increased simultaneously the leakproofness between first heat-proof structure 5 and the boundary beam 1, further reduce the temperature in the external environment and the battery in accommodation space 3 and produce heat exchange to the performance of battery has been improved.

Specifically, the structural adhesive can comprise heat-resistant components, so that the structural adhesive is prevented from being denatured in the heat exchange process, and the connection strength is prevented from being influenced.

In one embodiment, as shown in fig. 2, the battery pack case further includes a second heat insulation structure 7 disposed between the heat exchange plate 4 and the first heat insulation structure 5 within the first heat insulation structure 5, and the first heat insulation structure 5 has a hardness greater than that of the second heat insulation structure 7.

Specifically, in this embodiment, the second heat insulation structure 7 is a heat insulation pad, and the heat insulation pad is preferably made of silica gel, and has the advantages of soft material, compression resistance, no deformation and good heat insulation effect.

By arranging the second heat insulation structure 7 between the first heat insulation structure 5 and the heat exchange plate 4, heat exchange between the heat exchange plate 4 and the first heat exchange structure can be reduced, the influence of the external environment temperature on the heat exchange plate 4 is reduced, and the heat exchange performance of the heat exchange plate 4 is improved. At the same time, by limiting the hardness of the first heat insulating structure 5 to be greater than that of the second heat insulating structure 7, the first heat insulating structure 5 can be formed into a frame, and a stable accommodating space is formed inside the frame, so that the heat exchange plate 4 and the second heat insulating structure 7 can be conveniently installed at a later stage.

In one embodiment, as shown in fig. 1 and 6, the cross-sectional dimension of the bottom guard plate 2 on the side far from the first connecting portion 101 is smaller than the cross-sectional dimension of the side near to the first connecting portion 101, and the thickness of the left side of the bottom guard plate 2 is larger than the thickness of the right side of the bottom guard plate 2 in the view of fig. 6, and the area of the side of the bottom guard plate 2 far from the first connecting portion 101 is provided with a buffer member 8, and the buffer member 8 is disposed below the heat exchange plate 4.

Specifically, the cushioning member 8 in this embodiment is microporous foamed polypropylene (MPP, microcellular Polypropylene foam) cushioning foam. In other embodiments, not shown, the cushioning member 8 may also be an Ethylene-vinyl acetate copolymer (EVA, ethylene-vinyl Acetate Copolymer) cushioning foam or the like.

By arranging the buffer member 8 in the area below the heat exchange plate 4 far away from the side of the first connecting part 101, the buffer protection effect can be achieved on the heat exchange plate 4, and the heat exchange plate 4 is prevented from being damaged by impact generated between the heat exchange plate 4 and the bottom guard plate 2 due to vibration during running of the vehicle.

According to an embodiment of the present utility model, on the other hand, there is also provided a battery pack including the battery pack case in the present embodiment, and a battery provided in the accommodation space 3 of the battery pack case.

Through be provided with at least one indentation portion 102 on one of them on the boundary beam 1 of battery package box's first connecting portion 101 and the second connecting portion 201 of end backplate 2, be provided with on another with indentation portion 102 matched with bulge 202, after bulge 202 is connected with indentation portion 102 with connecting piece 203, no other spacing portion occupation in the accommodation space 3 that forms between end backplate 2 and boundary beam 1, can not reduce accommodation space 3's volume, thereby be favorable to arranging and installation of battery in accommodation space 3, accommodation space 3 inner wall is more even simultaneously, can not cause the extrusion to the battery under the operating mode such as collision, improved battery package's security.

Specifically, the material of the battery itself is not limited, and it may be a commonly used new energy battery in the prior art, such as a lithium iron phosphate battery, a ternary lithium battery, and the like.

According to an embodiment of the present utility model, in another aspect, there is also provided a vehicle including the battery pack of the embodiment.

In this embodiment, the vehicle is not particularly limited, and as an implementation manner, the vehicle may be a pure electric vehicle, a plug-in hybrid electric vehicle, an oil-electric hybrid electric vehicle or an extended range vehicle, and the battery pack is provided in the vehicle as a power system of the vehicle.

In one embodiment, the battery pack is arranged at the bottom of the vehicle, and the gravity center of the vehicle can be lowered by arranging the battery pack at the bottom of the vehicle, so that the control performance of the vehicle is improved, the internal space of the vehicle can be more spacious, and the internal space utilization rate of the vehicle is improved.

Through be provided with at least one indentation portion 102 on one of them on the boundary beam 1 of battery package box's first connecting portion 101 and the second connecting portion 201 of end backplate 2, be provided with on another with indentation portion 102 matched with bulge 202, after bulge 202 is connected with indentation portion 102 with connecting piece 203, no other spacing portion occupation in the accommodation space 3 that forms between end backplate 2 and boundary beam 1, can not reduce accommodation space 3's volume, thereby be favorable to arranging and installation of battery in accommodation space 3, accommodation space 3 inner wall is more even simultaneously, can not cause the extrusion to the battery under the operating mode such as collision, improved the security of vehicle.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims

1. A battery pack case, comprising:

the side beam (1), wherein a first connecting part (101) is arranged at the bottom of the side beam (1), and at least one retracting part (102) is arranged on the first connecting part (101);

the bottom guard plate (2) is arranged stably relative to the side beam (1), a second connecting part (201) is arranged at a position, corresponding to one side of the first connecting part (101), of the bottom guard plate (2), a protruding part (202) matched with the retracting part (102) is arranged on the second connecting part (201), and an accommodating space (3) suitable for accommodating a battery is formed between the side beam (1) and the bottom guard plate (2);

a heat exchange plate accommodating groove (103) provided in the indented portion (102) and located on an upper side of the protruding portion (202);

and a heat exchange plate (4) arranged in the heat exchange plate accommodating groove (103).

2. The battery pack case according to claim 1, wherein the indented portion (102) is welded to the protruding portion (202).

3. The battery pack case according to claim 2, wherein a first heat insulation structure (5) is further provided in the heat exchange plate accommodating groove (103), and the first heat insulation structure (5) is provided at the periphery of the heat exchange plate (4) to restrict heat exchange between the heat exchange plate (4) and the outside.

4. A battery pack case according to claim 3, wherein the side of the first heat insulating structure (5) facing the accommodation space (3) is provided with an opening adapted to mount the heat exchanger plate (4).

5. The battery pack case according to claim 3 or 4, wherein the first heat insulation structure (5) is provided with a limiting portion (501), the limiting portion (501) is located outside the heat exchange plate accommodating groove (103) and extends in a direction away from the heat exchange plate accommodating groove (103), and the limiting portion (501) is abutted to the side beam (1) so as to limit the first heat insulation structure (5) from excessively entering the heat exchange plate accommodating groove (103).

6. The battery pack case according to claim 4, wherein a mounting groove (502) is provided at the top of the first heat insulation structure (5), and an adhesive portion (6) is provided in the mounting groove (502).

7. The battery pack case according to claim 4, further comprising:

and the second heat insulation structure (7) is positioned in the first heat insulation structure (5) and is arranged between the heat exchange plate (4) and the first heat insulation structure (5).

8. The battery pack case according to claim 7, wherein the first heat insulating structure (5) has a hardness greater than that of the second heat insulating structure (7).

9. Battery pack case according to any one of claims 6 to 8, wherein the cross-sectional dimension of the bottom guard plate (2) on the side away from the first connection portion (101) is smaller than the cross-sectional dimension of the side close to the first connection portion (101), a buffer (8) is provided in the region of the bottom guard plate (2) on the side away from the first connection portion (101), and the buffer (8) is provided below the heat exchange plate (4).

10. A battery pack, comprising:

the battery pack case of any one of claims 1 to 9; the method comprises the steps of,

and the battery is arranged in the accommodating space (3) of the battery pack box body.

11. A vehicle, characterized by comprising:

the battery pack of claim 10.

12. The vehicle of claim 11, wherein the battery pack is disposed in a bottom position of the vehicle.