CN220400676U

CN220400676U - Battery pack and vehicle

Info

Publication number: CN220400676U
Application number: CN202322043809.XU
Authority: CN
Inventors: 江德发; 古伟军; 易彬; 徐广东; 景艳林
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-01-26
Anticipated expiration: 2033-07-28

Abstract

The utility model relates to a battery pack and a vehicle, wherein the battery pack comprises a battery pack shell, a battery cell group, a first mounting seat, a second mounting seat and a mounting frame, and the battery cell group is arranged in the battery pack shell; the battery pack shell is provided with a first side plate and a second side plate which are opposite, and the first mounting seat is fixed on the outer surface of the first side plate; the second mounting seat is fixed on the outer surface of the second side plate; the mounting frame comprises a first connecting part fixedly connected with the first mounting seat, a second connecting part fixedly connected with the second mounting seat and a third connecting part used for being connected to the vehicle body, wherein the bottom end of the first connecting part is connected with the bottom end of the second connecting part, and the third connecting part is connected to the top ends of the first connecting part and the second connecting part. Therefore, the battery pack can be fixed on the vehicle body through the mounting frame, a welding tray is not needed, the mounting process is simple, and the production cost is low.

Description

Battery pack and vehicle

Technical Field

The utility model belongs to the technical field of batteries, and relates to a battery pack and a vehicle.

Background

The parking battery of the truck is used for independently supplying power to the parking air conditioner, and can save gasoline or diesel oil for a truck driver, so that a long-distance driver can finally obtain larger economic benefits.

In the prior art, the parking battery of a truck is directly placed on a tray, and the tray is welded on a beam structure of the truck. However, the beam structures of different trucks are different, the trays are required to be welded separately for each vehicle type, the parking battery is fixed on the tray, the production cost is high, and the trays of a plurality of vehicle types cannot be shared.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: to among the prior art, the crossbeam structure of different freight train will be different, need the independent welding tray to every model motorcycle type, fix the parking battery on the tray again, problem that manufacturing cost is high provides a battery package and vehicle.

In order to solve the technical problems, in one aspect, the utility model provides a battery pack, which comprises a battery pack shell, a battery core group, a first mounting seat, a second mounting seat and a mounting frame, wherein the battery core group is arranged in the battery pack shell;

the battery pack shell is provided with a first side plate and a second side plate which are opposite, and the first mounting seat is fixed on the outer surface of the first side plate; the second mounting seat is fixed on the outer surface of the second side plate;

the mounting frame comprises a first connecting part fixedly connected with the first mounting seat, a second connecting part fixedly connected with the second mounting seat and a third connecting part used for being connected to the vehicle body, wherein the bottom end of the first connecting part is connected with the bottom end of the second connecting part, and the third connecting part is connected to the top ends of the first connecting part and the second connecting part.

Optionally, the mounting bracket further comprises a fourth connecting part connected with the bottom end of the first connecting part and the bottom end of the second connecting part, the fourth connecting part supports the bottom of the battery pack shell, the first connecting part is located on the outer side of the first mounting seat, and the second connecting part is located on the outer side of the second mounting seat.

Optionally, the third connecting portion includes a first mounting plate and a second mounting plate, the first mounting plate extends from the top end of the first connecting portion to a direction away from the first side plate, and the second mounting plate extends from the top end of the second connecting portion to a direction away from the second side plate;

the first mounting plate is provided with a first mounting hole for being connected with the vehicle body, and the second mounting plate is provided with a second mounting hole for being connected with the vehicle body.

Optionally, a first water bar extending away from the second side plate is arranged at the edge of the first side plate, the first water bar is enclosed to form a first installation space, and the first installation seat is positioned in the first installation space; the edge of the second side plate is provided with a second water bar which extends back to the first side plate, the second water bar is enclosed to form a second installation space, and the second installation seat is positioned in the second installation space;

the surface of the first installation seat, which is away from the first side plate, is located in the first installation space, and the surface of the second installation seat, which is away from the second side plate, is located in the second installation space.

Optionally, one of the top section and the bottom section of the first water bar is a turned edge which is bent and laminated, and the other is a hollow beam structure;

one of the top section and the bottom section of the second water bar is a folded and laminated flanging, and the other is a hollow beam structure.

Optionally, the two opposite side sections of the first water bar in the length direction of the battery pack shell are bent and laminated flanges; the two opposite side sections of the second water bar in the length direction of the battery pack shell are bent and laminated flanges.

Optionally, the first water bar is disposed around an edge of the first side plate, and the second water bar is disposed around an edge of the second side plate.

Optionally, the battery pack further includes a first reinforcing rib fixed on an outer surface of the first side plate and located in the first installation space;

the battery pack further comprises a second reinforcing rib, wherein the second reinforcing rib is fixed on the outer surface of the second side plate and is positioned in the second installation space.

Optionally, the first reinforcing rib extends along the height direction of the battery pack case, and the second reinforcing rib extends along the height direction of the battery pack case;

the two ends of the first reinforcing rib are connected to the first water bar, and the two ends of the second reinforcing rib are connected to the second water bar.

Optionally, two first installation seats and two second installation seats are provided, and each first installation seat and the corresponding second installation seat are opposite to each other;

the mounting frames are two, and each mounting frame is connected with the opposite first mounting seat and second mounting seat.

Optionally, the battery pack shell comprises a bottom shell and a sealing cover, and the sealing cover is connected to the bottom shell in a sealing manner;

the bottom shell comprises a bottom plate, a first side plate and a second side plate, and the bottom plate is connected between the bottom of the first side plate and the bottom of the second side plate.

Optionally, a through groove extending along the length direction of the bottom shell is formed in the bottom shell, the through groove is provided with a top opening, a first end opening and a second end opening, and the first end opening and the second end opening are positioned at two opposite ends of the through groove in the length direction;

the sealing cover comprises a top plate, a first end plate and a second end plate, wherein the top plate is connected between the top of the first end plate and the top of the second end plate, the first end plate and the second end plate are opposite in the length direction of the battery pack shell, the top plate is connected to the top of the bottom shell and covers the top opening, the first end plate is connected to one end of the bottom shell and covers the first end opening, and the second end plate is connected to the other end of the bottom shell and covers the second end opening.

Optionally, the battery cell group includes a plurality of battery cells, the battery cells are flat cuboid, and a plurality of battery cells are stacked along its thickness direction.

According to the battery pack disclosed by the embodiment of the utility model, the battery pack shell is provided with the first side plate and the second side plate which are opposite, the first mounting seat is fixed on the outer surface of the first side plate, and the second mounting seat is fixed on the outer surface of the second side plate. The mounting frame comprises a first connecting part fixedly connected with the first mounting seat, a second connecting part fixedly connected with the second mounting seat and a third connecting part used for being connected to the vehicle body. Therefore, the battery pack can be fixed on the vehicle body through the mounting frame, a welding tray is not needed, the mounting process is simple, and the production cost is low. In addition, the special tray is not required to be customized according to different vehicle types, and the installation of the battery pack can be realized only by connecting the installation frame at the proper position of the vehicle body, so that the battery pack can be shared by multiple vehicle types.

In addition, the surface of the first installation seat facing away from the first side plate is located in the first installation space, and the surface of the second installation seat facing away from the second side plate is located in the second installation space. That is, the first mount pad is outside does not have protruding first installation space, and the second mount pad is outside does not have protruding second installation space, and first breakwater and second breakwater can be used for the waterproof of battery package, and first mount pad and second mount pad do not occupy the external space of battery package, are favorable to reducing the space occupation of battery package. Like this, in the first installation space that first breakwater encloses to close and in the second installation space that second breakwater encloses to close and forms, realized waterproof (first breakwater and second breakwater), taut and the triple function of equipment (first mount pad and second mount pad) of battery package, realize space utilization maximize, can reduce the volume of battery package like this, alleviate the weight of battery package, reduce the space occupation of battery package, the installation of battery package is more nimble, and suitable space is all found to different motorcycle types and is installed the battery package.

On the other hand, the embodiment of the utility model also provides a vehicle which comprises the battery pack.

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 battery pack according to an embodiment of the present utility model with the mounting frame removed;

fig. 3 is an enlarged view of a mounting bracket of a battery pack according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a battery pack according to an embodiment of the present utility model;

fig. 5 is an enlarged view at a in fig. 4.

Reference numerals in the specification are as follows:

1. a battery pack case; 11. a bottom case; 111. a first side plate; 1111. a first water bar; 11111. a top section of the first water bar; 11112. a bottom section of the first water bar; 1112. a first installation space; 112. a second side plate; 1121. a second water bar; 11211. a top section of the second water bar; 11212. a bottom section of the second water bar; 1122. a second installation space; 113. a bottom plate; 12. sealing cover; 121. a top plate; 1211. a first top flange; 1212. a second top flange; 122. a first end plate; 123. a second end plate; 2. a cell group; 21. a battery cell; 3. a first mount; 31. a first perforation; 4. a mounting frame; 41. a first connection portion; 411. a first through hole; 42. a second connecting portion; 421. a second through hole; 43. a third connecting portion; 431. a first mounting plate; 4311. a first mounting hole; 432. a second mounting plate; 4321. a second mounting hole; 44. a fourth connecting portion; 5. a first reinforcing rib; 6. a bolt; 7. a nut; 8. and (3) a screw.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 5, a battery pack according to an embodiment of the present utility model includes a battery pack case 1, a battery cell group 2, a first mounting seat 3, a second mounting seat (not shown in the drawings), and a mounting frame 44, where the battery cell group 2 is disposed in the battery pack case 1. The battery pack case 1 has a first side plate 111 and a second side plate 112 opposite to each other, and the first mounting base 3 is fixed on the outer surface of the first side plate 111; the second mounting seat is fixed on the outer surface of the second side plate 112; the mounting rack 4 comprises a first connecting portion 41 fixedly connected with the first mounting seat 3, a second connecting portion 42 fixedly connected with the second mounting seat and a third connecting portion 43 used for being connected to a vehicle body, the bottom end of the first connecting portion 41 is connected with the bottom end of the second connecting portion 42, and the third connecting portion 43 is connected to the top ends of the first connecting portion 41 and the second connecting portion 42.

The second mount is not visible in the figures, its general structure being referenced to the first mount 3. The first mounting seat 3 and the second mounting seat can be identical, so that the die cost is saved. Of course, the first mounting seat 3 and the second mounting seat may also be different.

Thus, the first mounting seat 3 is accommodated in the first mounting space 1112, the second mounting seat is accommodated in the second mounting space 1122, the first mounting seat 3 and the second mounting seat cannot protrude out of the battery pack, and the space occupation is small, so that the space occupation of the whole battery pack can be reduced. The first mount 3 and the second mount can also increase the strength of the battery pack case 1.

In an embodiment, a first water bar 1111 extending away from the second side plate 112 is disposed at an edge of the first side plate 111, the first water bar 1111 encloses a first installation space 1112, and the first installation seat 3 is located in the first installation space 1111; the edge of the second side plate 112 is provided with a second water bar 1121 extending away from the first side plate 111, the second water bar 1121 encloses to form a second installation space 1122, and the second installation seat is located in the second installation space 1122. The surface of the first mounting seat 3 facing away from the first side plate 111 is located in the first mounting space 1111, and the surface of the second mounting seat facing away from the second side plate 112 is located in the second mounting space 1122.

In one embodiment, the battery pack case 1 includes a bottom case 11 and a sealing cover 12, and the sealing cover 12 is hermetically connected to the bottom case 11. The bottom shell 11 is connected with the sealing cover 12 through bolts or riveted. The bottom case 11 includes a bottom plate 113, the first side plate 111, and the second side plate 112, and the bottom plate 113 is connected between the bottom of the first side plate 111 and the bottom of the second side plate 112.

In an embodiment, a sealing rubber strip is arranged on the matching surface of the bottom shell 11 and the sealing cover 3, so that the sealing of the battery pack is realized, and the waterproof and dustproof effects of the battery pack are realized.

In one embodiment, the first water bar 1111 is disposed around the edge of the first side plate 111, and the second water bar 1121 is disposed around the edge of the second side plate 112. The first water bar 1111 and the second water bar 1121 can increase the strength of the battery pack case 1.

In an embodiment, referring to fig. 5, the top section 11111 of the first water bar 1111 is a folded and laminated flange, and the bottom section 11112 of the first water bar 1111 is a hollow beam structure, so as to enhance the strength of the first water bar 1111, and realize weight reduction of the battery pack under the same strength. The top section 11211 of the second water bar 1121 is a folded and laminated flange, and the bottom section 11212 of the second water bar 1121 is a hollow beam structure, so as to enhance the self strength of the second water bar 1112.

The opposite side sections of the first water bar 1111 in the length direction of the battery pack case 1 are similar in structure to the top section 11111, and are folded and overlapped flanges to enhance the self-strength of the first water bar 1111. The second water bar 1121 has a similar structure to the top section 11211 at opposite side sections in the longitudinal direction of the battery pack case 1, and is a folded and laminated flange to enhance the self-strength of the second water bar 1112.

Of course, in another embodiment, the top section 11111 of the first water bar 1111 may be a hollow beam structure, and the bottom section 11112 of the first water bar 1111 may be a folded and laminated flange. The top section 11211 of the second water bar 1121 is a hollow beam structure, and the bottom section 11212 of the second water bar 1121 is a folded and laminated flange.

In an embodiment, referring to fig. 1 and 2, the battery pack further includes a first reinforcing rib 5, and the first reinforcing rib 5 is fixed on the outer surface of the first side plate 111 by welding or the like and is located in the first installation space 1111. The first reinforcing ribs 5 can reinforce the strength of the first side plate 111.

In one embodiment, the battery pack further includes a second reinforcing rib (not shown) fixed to the outer surface of the second side plate 112 by welding or the like and positioned in the second installation space 1121. The first reinforcing rib can reinforce the strength of the second side plate 112.

In this way, the strength of both sides of the battery pack case 1 can be enhanced by the first and second reinforcing ribs 5, 21 to restrict expansion of the internal battery cells.

The second reinforcing bars are not visible in the figures, the general structure of which is referred to the first reinforcing bars 5. The first reinforcing rib 5 and the second reinforcing rib may be identical to each other to save the cost of the mold. Of course, the first reinforcing bead 5 and the second reinforcing bead may also be different.

In an embodiment, the first reinforcing rib 5 extends along the height direction of the battery pack case 1, and the second reinforcing rib extends along the height direction of the battery pack case 1; the first reinforcing rib 5 has both ends connected (e.g., welded) to the first water barrier 1111, and the second reinforcing rib has both ends connected (e.g., welded) to the second water barrier 1121, so that the strength of the first side plate 111 and the second side plate 112 is further increased. Like this, the very big promotion intensity of first curb plate 111 through first manger plate strip 1111, first mount pad 3 and first strengthening rib 5, the very big promotion intensity of second curb plate 112 through second manger plate strip 1121, second mount pad and second strengthening rib for the intensity of drain pan 11 is strengthened, can protect inside electric core group 2 better.

In an embodiment, referring to fig. 1 and 2, two first mounting seats 3 and two second mounting seats are provided, and each first mounting seat 3 is opposite to the corresponding second mounting seat. That is, one first mount 3 and its corresponding second mount are opposed in the width direction of the battery pack. At this time, referring to fig. 1, two mounting frames 4 are provided, and each mounting frame 4 is connected to the opposite first mounting seat 3 and second mounting seat.

However, in other embodiments, the number of the first mounting seats 3 and the second mounting seats may be one or more than three according to different requirements, and the number of the mounting frames 4 is correspondingly set.

In an embodiment, referring to fig. 3, the mounting frame 4 is generally U-shaped, and the mounting frame 4 further includes a fourth connecting portion 44 connecting the bottom end of the first connecting portion 41 and the bottom end of the second connecting portion 42, where the fourth connecting portion 44 is located outside (below) the bottom plate 113, the first connecting portion 41 is located outside the first side plate 111, and the second connecting portion 42 is located outside the second side plate 112. That is, the mounting bracket 4 is fitted over the battery pack case 1.

In an embodiment, referring to fig. 1 and 3, the third connecting portion 43 includes a first mounting plate 431 and a second mounting plate 432, the first mounting plate 431 extends from the top end of the first connecting portion 41 in a direction away from the first side plate 111, and the second mounting plate 432 extends from the top end of the second connecting portion 42 in a direction away from the second side plate 112; the first mounting plate 431 is provided with a first mounting hole 4311 for connecting with a vehicle body through a bolt 6 and a nut 7, and the second mounting plate 432 is provided with a second mounting hole 4321 for connecting with the vehicle body through the bolt 6 and the nut 7. In this way, the battery pack is hung upside down on the vehicle body (for example, a cross beam) through the mounting frame 4. In this way, no excessive body space is taken up.

In an embodiment, the first connection portion 41 is detachably connected to the first mounting base 3, and the second connection portion 42 is detachably connected to the second mounting base. For example, referring to fig. 1 to 3, the first connecting portion 41 is provided with a first through hole 411, the first mounting seat 3 is provided with a first through hole 31, a first nut is disposed on the inner side of the first through hole 31, and a screw 8 passes through the first through hole 411 and the first through hole 411 to fixedly connect the first connecting portion 41 and the first mounting seat 3. Similarly, a second through hole 421 is provided on the second connecting portion 42, a second through hole is provided on the second mounting seat, a second nut is provided on the inner side of the second through hole, and a screw rod passes through the second through hole 421 and the second through hole to fixedly connect the second connecting portion 42 with the second mounting seat. Thus, the mount bracket 4 is fixed to the first mount 3 and the second mount 4.

However, in other embodiments, the first connecting portion 41 and the first mounting base 3 may be welded, riveted, or the like. The second connecting portion 41 and the second mounting seat may be welded, riveted, or the like.

In an embodiment, the bottom shell 11 has a through groove extending along a length direction thereof, and the through groove has a top opening, a first end opening and a second end opening, and the first end opening and the second end opening are located at opposite ends of the through groove in the length direction. The sealing cover 12 comprises a top plate 121, a first end plate 122 and a second end plate 123, wherein the top plate 121 is connected between the top of the first end plate 122 and the top of the second end plate 123, the first end plate 122 and the second end plate 123 are opposite in the length direction of the battery pack shell 1, the top plate 121 is connected to the top of the bottom shell 11 and seals the top opening, the first end plate is connected to one end of the bottom shell and seals the first end opening, and the second end plate 123 is connected to the other end of the bottom shell 11 and seals the second end opening.

In one embodiment, referring to fig. 5, one widthwise side edge of the top plate 121 is beyond the top section 11111 of the first water bar 1111, and one widthwise side edge of the top plate 121 is folded down to form the first top flange 1211. The other side edge of the top plate 121 in the width direction exceeds the top section 11211 of the second water bar 1121, and the other side edge of the top plate 121 in the width direction is turned down to form a second top burring 1212. The first top flange 1211 is located outside the top section 11111 of the first water bar 1111, and the second top flange 1212 is located outside the top section 11211 of the second water bar 1121, so that the top section 11111 of the first water bar 1111 and the top section 11211 of the second water bar 1121 can be better protected, and a better waterproof effect can be achieved.

The two sides of the first end plate 122 are respectively provided with a first side flanging and a second side flanging which are turned over in opposite directions, the two sides of the second end plate 123 are respectively provided with a third side flanging and a fourth side flanging which are turned over in opposite directions, the first side flanging is positioned on the outer side of one side section of the first water bar 1111 in the length direction of the battery pack shell 1, and the third side flanging is positioned on the outer side of the other side section of the first water bar 1111 in the length direction of the battery pack shell 1. The second side flange is located outside one side section of the second water bar 1121 in the length direction of the battery pack case 1, and the fourth side flange is located outside the other side section of the second water bar 1121 in the length direction of the battery pack case 1.

Like this, first side turn-ups, second side turn-ups, third side turn-ups and fourth side turn-ups can protect the both sides section of first water bar 1111 and second water bar 1121 in the length direction of battery package casing 1 better, realize better water-proof effects. In an embodiment, referring to fig. 4, the battery cell group 2 includes a plurality of battery cells 21, the battery cells 21 are in a flat cuboid shape, and the plurality of battery cells 21 are stacked along the thickness direction thereof.

According to the battery pack disclosed by the embodiment of the utility model, the battery pack can be fixed on the vehicle body through the mounting frame 4, a welding tray is not needed, the mounting process is simple, and the production cost is lower. In addition, the special tray is not required to be customized according to different vehicle types, and the installation of the battery pack can be realized only by connecting the installation frame 4 at the proper position of the vehicle body, so that the battery pack can be shared by multiple vehicle types.

In addition, the surface of the first mounting seat 3 facing away from the first side plate 111 is located in the first mounting space 1111, the surface of the second mounting seat facing away from the second side plate 112 is located in the second mounting space 1122, the first water retaining bar 1111 and the second water retaining bar 1121 can be used for waterproofing the battery pack, and the first mounting seat 3 and the second mounting seat do not occupy the external space of the battery pack, which is beneficial to reducing the space occupation of the battery pack. Thus, in the first installation space 1112 formed by enclosing the first water bar 1111 and the second installation space 1122 formed by enclosing the second water bar 1121, triple functions of waterproofing (the first water bar 1111 and the second water bar 1121), tensioning and assembling (the first installation seat 3 and the second installation seat) of the battery pack are realized, space utilization maximization is realized, the volume of the battery pack can be reduced, the weight of the battery pack is reduced, the space occupation of the battery pack is reduced, the installation of the battery pack is more flexible, and suitable space can be found for installing the battery pack by different vehicle types.

In addition, the embodiment of the utility model also provides a vehicle, which comprises the battery pack of the embodiment.

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, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The battery pack is characterized by comprising a battery pack shell, a battery cell group, a first mounting seat, a second mounting seat and a mounting frame, wherein the battery cell group is arranged in the battery pack shell;

2. The battery pack of claim 1, wherein the mounting bracket further comprises a fourth connecting portion connecting a bottom end of the first connecting portion and a bottom end of the second connecting portion, the fourth connecting portion supporting a bottom of the battery pack housing, the first connecting portion being located outside the first mounting seat, and the second connecting portion being located outside the second mounting seat.

3. The battery pack according to claim 2, wherein the third connecting portion includes a first mounting plate and a second mounting plate, the first mounting plate extending from a top end of the first connecting portion in a direction away from the first side plate, the second mounting plate extending from a top end of the second connecting portion in a direction away from the second side plate;

4. The battery pack according to claim 1, wherein the edge of the first side plate is provided with a first water bar extending away from the second side plate, the first water bar enclosing to form a first installation space, and the first installation seat is located in the first installation space; the edge of the second side plate is provided with a second water bar which extends back to the first side plate, the second water bar is enclosed to form a second installation space, and the second installation seat is positioned in the second installation space; the surface of the first installation seat, which is away from the first side plate, is located in the first installation space, and the surface of the second installation seat, which is away from the second side plate, is located in the second installation space.

5. The battery pack of claim 4, wherein one of the top section and the bottom section of the first water bar is a folded and laminated flange, and the other is a hollow beam structure;

6. The battery pack according to claim 4, wherein the opposite side sections of the first water bar in the length direction of the battery pack case are folded and laminated flanges; the two opposite side sections of the second water bar in the length direction of the battery pack shell are bent and laminated flanges.

7. The battery pack of claim 4, wherein the first water bar is disposed around an edge of the first side plate and the second water bar is disposed around an edge of the second side plate.

8. The battery pack of claim 4, further comprising a first stiffener secured to an outer surface of the first side plate and positioned within the first mounting space;

9. The battery pack of claim 8, wherein the first stiffener extends in a height direction of the battery pack housing and the second stiffener extends in a height direction of the battery pack housing;

10. The battery pack according to claim 1, wherein two first mounting seats and two second mounting seats are provided, and each first mounting seat is opposite to the corresponding second mounting seat;

11. The battery pack of claim 1, wherein the battery pack housing comprises a bottom shell and a sealing cover, the sealing cover being sealingly connected to the bottom shell;

12. The battery pack according to claim 11, wherein the bottom case has a through-groove formed therein extending in a length direction thereof, the through-groove having a top opening, a first end opening, and a second end opening, the first end opening and the second end opening being located at opposite ends of the through-groove in the length direction;

13. The battery pack according to any one of claims 1 to 12, wherein the cell group includes a plurality of cells having a flat rectangular parallelepiped shape, the plurality of cells being stacked in a thickness direction thereof.

14. A vehicle comprising a battery pack according to any one of claims 1-13.