Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle. The battery pack comprises a shell and a plurality of battery cells mounted in the shell. The battery cell comprises a top surface and a bottom surface which are oppositely arranged, and an insulating surface connected with the top surface and the bottom surface; the plurality of battery cells are arranged along a first direction. And in the first direction, an anti-abrasion piece is arranged between the adjacent battery cells. And the anti-abrasion piece is connected with the insulating surface of the adjacent battery cell in an adhesive manner to form a preassembled group. The multiple preassembling sets are arranged at intervals in the second direction perpendicular to the first direction. When the battery cells are installed, the multiple battery cells can be bonded through the anti-abrasion pieces to form the pre-assembling set, the mechanical arm can grab the pre-assembling set to be installed as a whole, the production efficiency is improved, meanwhile, the space needing to be reserved between the battery cells is reduced, and the space utilization rate of a battery pack is increased. In addition, the abrasion-proof pieces can avoid friction between the insulating surfaces of the adjacent battery cells, so that the safety of the battery pack is improved. And meanwhile, a plurality of battery cells are connected through the adhesive, so that the structural strength is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery pack and a vehicle. BACKGROUND

[0002] With the gradual development of vehicle technology, new energy vehicles have gradually become popular. The battery pack is one of the core components of the new energy vehicle, and the battery pack is connected in series and parallel through the battery cells to store and release electric energy, providing the necessary power for the driving of the vehicle.

[0003] For the installation structure of the battery cell, there is a CTP (Cell To Pack) technology, which directly installs the battery cell to the battery pack, thereby saving the module structure and increasing the number of battery cells that can be installed in the battery pack.

[0004] In the current CTP technology, the battery cell is installed in the battery pack one by one by the mechanical arm. On the one hand, the production efficiency of this method is low. On the other hand, in order to reserve the operation space of the mechanical arm, the distance between the battery cells in the battery pack is far, which reduces the space utilization of the battery pack. UTILITY MODEL CONTENT

[0005] The present application provides a battery pack and a vehicle to solve the related technical problems.

[0006] The present application provides a battery pack, comprising a shell and a plurality of battery cells installed in the shell; the battery cell comprises a top surface and a bottom surface arranged opposite to each other and an insulating surface connecting the top surface and the bottom surface; a plurality of battery cells are arranged along a first direction; in the first direction, a wear-resistant piece is arranged between adjacent battery cells; the wear-resistant piece is adhesively connected with the insulating surface of the adjacent battery cell to form a battery cell pre-installation group; a plurality of pre-installation groups are arranged at intervals along a second direction perpendicular to the first direction.

[0007] When the battery cell is installed, a plurality of battery cells can be first bonded by the wear-resistant piece to form a pre-installation group, and the mechanical arm can grasp the whole pre-installation group for installation, thereby increasing the production efficiency, reducing the space required to be reserved between the battery cells, and improving the space utilization of the battery pack. Moreover, the wear-resistant piece can avoid friction between the insulating surfaces of adjacent battery cells, thereby improving the safety of the battery pack. At the same time, by adhesively connecting a plurality of battery cells, the structural strength is improved.

[0008] Further, the wear-resistant piece is in the form of a sheet, which reduces the space occupied by the wear-resistant piece, so that more space is provided in the shell for the installation of the battery cell, thereby further improving the space utilization of the battery pack.

[0009] Further, the insulation surface comprises a pair of small faces and a pair of large faces, the pair of small faces are oppositely arranged in the first direction, the pair of large faces are oppositely arranged in the second direction, and the wear-resistant piece connects the small faces of adjacent battery cells. The battery cells will deform to a certain extent during use, and the large faces will deform to a greater extent. By connecting the small faces of the battery cells, the influence of the deformation of the battery cells on the adhesive connection is reduced, and the structural strength is further improved.

[0010] Further, the bottom of the battery cell is glued to the shell by structural glue; the wear-resistant piece comprises a main body; and the bottom of the main body is provided with a first notch, and the structural glue is filled into the first notch. By providing the first notch, the structural glue can overflow into the first notch during installation, thereby improving the installation strength of the battery cell.

[0011] Further, in the first direction, the first notch penetrates through the main body. Since the first notch penetrates through the main body in the first direction, the structural glue can bond adjacent battery cells, thereby further improving the installation strength of the battery cell.

[0012] Further, the first notch is symmetrically arranged in the second direction; and the top of the main body is provided with a second notch which is symmetric to the first notch. During installation of the wear-resistant piece, the wear-resistant piece can be installed in the correct way regardless of how it is reversed or turned over, thereby improving the installation convenience.

[0013] Further, the main body comprises an intermediate portion between the symmetric first notch and the second notch, and in the height direction, the length of the first notch is greater than the length of the intermediate portion. Since the length of the first notch is longer, the amount of structural glue that can be filled into the first notch is increased, thereby strengthening the installation stability of the battery cell.

[0014] Further, the main body is rectangular; the number of the first notches is at least two; and the two first notches are arranged at two corners of the bottom of the main body, respectively. The structural glue can fix the battery cell from the two corners, thereby improving the installation strength of the battery cell.

[0015] Further, there is a gap between the main body and the bottom surface of the battery cell, and the structural glue is filled into the gap. By providing the gap to fill the structural glue, the installation strength of the battery cell is further improved.

[0016] The application also provides a vehicle comprising the above battery pack. Since the battery pack has high production efficiency, space utilization rate and structural strength, the vehicle of the application has a shorter manufacturing cycle, longer endurance and higher safety.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0019] Figure 1 This is a schematic diagram of the structure of a battery pack in an exemplary embodiment of this application;

[0020] Figure 2 yes Figure 1 Structural diagram of the pre-assembled assembly;

[0021] Figure 3 yes Figure 2 Partial structural diagram of the pre-assembled assembly;

[0022] Figure 4 yes Figure 2 3D exploded view of the pre-assembled assembly.

[0023] Explanation of reference numerals: Casing - 10; Battery cell - 20; Pre-assembled assembly - 200; Top surface - 21; Bottom surface - 22; Insulating surface - 23; Small surface - 231; Large surface - 232; Anti-wear component - 30; First double-sided adhesive - 301; Second double-sided adhesive - 302; Main body - 31; Middle part - 311; First notch - 32; Second notch - 33; Gap - 34; Structural adhesive - 40; Base - 41; Overflow part - 42. Detailed Implementation

[0024] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0025] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0026] In the current CTP (Cell To Pack) technology, the cells need to be installed into the battery pack one by one by a mechanical arm. On the one hand, the production efficiency of this method is low. On the other hand, in order to reserve the operation space of the mechanical arm, the distance between the cells in the battery pack is far, which reduces the space utilization of the battery pack. The present application provides a battery pack and a vehicle to solve the related problems.

[0027] As shown in Figure 1 and Figure 2 , the present application provides a battery pack, which comprises a shell 10 and a plurality of cells 20. The plurality of cells 20 are installed into the shell 10. The cell 20 comprises a top surface 21, a bottom surface 22 and an insulation surface 23. The top surface 21 and the bottom surface 22 are oppositely arranged. The insulation surface 23 connects the top surface 21 and the bottom surface 22. The insulation surface 23 can be formed by wrapping an insulating blue film on the side of the cell 20.

[0028] The plurality of cells 20 are arranged along a first direction. The first direction is the direction shown in Figure 1 l1, which can be the left-right direction of the vehicle. In the first direction, a wear-resistant piece 30 is arranged between adjacent cells 20. The wear-resistant piece 30 is adhesively connected with the insulation surface 23 of the adjacent cell 20 to form a pre-assembled group 200. A plurality of pre-assembled groups 200 are arranged in a second direction perpendicular to the first direction. The second direction is the direction shown in Figure 1 l2, which can be the front-rear direction of the vehicle.

[0029] Since the wear-resistant piece 30 adhesively connects the adjacent cells 20 and forms the pre-assembled group 200, the mechanical arm can grasp the whole pre-assembled group 200 for installation, which increases the production efficiency, reduces the space that needs to be reserved between the cells 20, and improves the space utilization of the battery pack. Moreover, the wear-resistant piece 30 can avoid friction between the insulation surfaces 23 of the adjacent cells, which improves the safety of the battery pack. At the same time, by adhesively connecting the plurality of cells 20, the structural strength is improved.

[0030] As shown in Figure 3 , the cell 20 can be a square cell. The insulation surface 23 comprises a pair of small surfaces 231 and a pair of large surfaces 232. The pair of small surfaces 231 are oppositely arranged in the first direction, and the pair of large surfaces 232 are oppositely arranged in the second direction. The wear-resistant piece 30 connects the small surfaces 231 of the adjacent cells 20.

[0031] During the use of the cell 20, the insulation surface 23 will deform to a certain extent, and the deformation degree of the large surface 232 is greater than that of the small surface 231. By connecting the small surfaces 231 of the adjacent cells 20, the influence of the deformation of the cell 20 on the adhesion connection is reduced, which further improves the structural strength.

[0032] The wear-resistant piece 30 can be in a sheet shape, reducing the space occupied by the wear-resistant piece 30, so that more space is available in the shell 10 for installation of the battery cell 20, further improving the space utilization of the battery pack.

[0033] Please refer to Figure 4 As shown, the wear-resistant piece 30 includes a main body 31. The main body 31 is provided with a first double-sided adhesive 301 and a second double-sided adhesive 302 on both sides, respectively, to bond adjacent battery cells 20. The bottom of the battery cell 20 is glued to the shell 10 by the structural adhesive 40.

[0034] Gluing the battery cells 20 into a pre-assembled group 200 can also improve the flatness of the battery cells 20. During the installation of the battery cells 20, the battery cells 20 themselves will extrude the structural adhesive 40. Due to the error of the mechanical arm, the degree of extrusion of the structural adhesive 40 by each battery cell 20 is not completely consistent, so that the relative heights of the plurality of battery cells 20 in the battery pack are different.

[0035] Due to the different relative heights of the battery cells 20, on the one hand, the busbar for collecting current is difficult to install, reducing the performance of the battery pack. On the other hand, the thickness of the structural adhesive 40 at the bottom of the battery cell 20 is not uniform, resulting in uneven heat transfer of the structural adhesive 40, shortening the service life of the battery pack. Gluing the battery cells 20 into a pre-assembled group 200 in advance can bond the plurality of battery cells 20 to be flush during the pre-installation stage, thereby better solving the above problems and improving the performance and service life of the battery pack.

[0036] The bottom of the main body 31 is provided with a first notch 32, and the structural adhesive 40 is filled into the first notch 32. By providing the first notch 32, during installation, the structural adhesive 40 can overflow into the first notch 32 during extrusion by the battery cell 20, improving the installation strength of the battery cell 20.

[0037] In the first direction, the first notch 32 passes through the main body 31. The structural adhesive 40 can bond adjacent battery cells 20, further improving the installation strength of the battery cell 20. The first notch 32 is symmetrically arranged in the second direction. The top of the main body 31 is provided with a second notch 33 symmetrical to the first notch 32. During installation of the wear-resistant piece 30, no matter how it is reversed or turned over, the wear-resistant piece 30 can be installed in the correct way, improving the installation convenience.

[0038] The main body 31 includes an intermediate portion 311. The intermediate portion 311 is located between the symmetrical first notch 32 and the second notch 33. In the height direction, the length of the first notch 32 is greater than the length of the intermediate portion 311. Due to the longer length of the first notch 32, the amount of structural adhesive 40 that can be filled into the first notch is increased, improving the installation stability of the battery cell 20.

[0039] The main body 31 is rectangular, and the number of the first notches 32 is two, and the two first notches 32 are respectively arranged at two corners of the bottom of the main body 31. The structural adhesive 40 can fix the battery cell 20 from the two corners, and the installation strength of the battery cell 20 is improved.

[0040] There is a gap 34 between the main body 31 and the bottom surface 22 of the battery cell 20, and the structural adhesive 40 fills into the gap 34. By arranging the gap 34 to fill the structural adhesive 49, the installation strength of the battery cell 20 is further improved. The structural adhesive 40 includes a base 41 and an overflow part 42. The base 41 is arranged at the bottom of the battery cell 20. The overflow part 42 fills into the gap 34 and the first notch 32.

[0041] The specific material type of the wear-resistant part 30 is not limited, and it has a certain wear-resistant performance. The material of the wear-resistant part 30 can also have insulation performance, so as to avoid the conduction of adjacent battery cells 20, so as to further improve the safety performance of the battery pack. For example, the wear-resistant part 30 can be PC (Polycarbonate, Polycarbonate) material and the like.

[0042] The application also provides a vehicle including the above battery pack. Since the battery pack has high production efficiency, the vehicle of the application has a short manufacturing cycle. Moreover, by improving the space utilization of the battery pack, more battery cells can be installed in the battery pack, and the endurance of the vehicle is improved. At the same time, since the structural strength of the battery pack is high, the vehicle of the application has high safety.

[0043] The vehicle of the application can be an electric vehicle or a hybrid vehicle, and the specific type is not limited.

[0044] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a shell and a plurality of battery cells mounted in the shell; each of the battery cells comprises a top surface, a bottom surface and an insulation surface connecting the top surface and the bottom surface; a plurality of the battery cells are arranged along a first direction; in the first direction, a wear-resistant piece is arranged between adjacent battery cells; the wear-resistant piece is adhesively connected to the insulation surface of the adjacent battery cells to form a pre-assembled group; a plurality of the pre-assembled groups are arranged at intervals along a second direction perpendicular to the first direction.

2. The battery pack of claim 1, wherein, The wear-resistant piece is in the shape of a sheet.

3. The battery pack of claim 1, wherein, The insulation surface comprises a pair of small surfaces and a pair of large surfaces; the pair of small surfaces are arranged opposite to each other in the first direction, and the pair of large surfaces are arranged opposite to each other in the second direction; the wear-resistant piece is connected to the small surfaces of the adjacent battery cells.

4. The battery pack of claim 1, wherein, The bottom of the battery cell is adhesively connected to the shell by structural adhesive; the wear-resistant piece comprises a main body; the bottom of the main body is provided with a first notch, and the structural adhesive is filled into the first notch.

5. The battery pack of claim 4, wherein, In the first direction, the first notch penetrates through the main body.

6. The battery pack of claim 4, wherein, The first notch is symmetrically arranged in the second direction; the top of the main body is provided with a second notch symmetrically arranged with the first notch.

7. The battery pack of claim 6, wherein, The main body comprises an intermediate portion between the symmetrically arranged first notch and second notch; in the height direction, the length of the first notch is greater than the length of the intermediate portion.

8. The battery pack of claim 4, wherein, The main body is in the shape of a rectangle; the number of the first notches is at least two; the two first notches are arranged at two corners of the bottom of the main body, respectively.

9. The battery pack of claim 4, wherein, There is a gap between the main body and the bottom surface of the battery cell, and the structural adhesive is filled into the gap.

10. A vehicle characterized by comprising: The battery pack comprises: The battery pack according to any one of claims 1-9.

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