Battery cell pressing strip, battery pack and vehicle

Abstract

The utility model relates to the technical field of batteries, particularly provides a battery cell pressing strip, a battery pack and a vehicle, and aims to solve the problem that the existing battery pack is easy to be degummed. Therefore, the battery cell pressing strip is provided with a first battery cell connecting part which extends along the length direction of the battery cell pressing strip, and the first battery cell connecting part comprises a plurality of first sub-connecting parts which are distributed at intervals along the length direction of the battery cell pressing strip; a first gap is formed between two adjacent first sub-connecting parts of the battery cell pressing strip, so that the two adjacent first sub-connecting parts can relatively move along the thickness direction of the battery cell pressing strip. The first battery cell connecting part is divided into the plurality of first sub-connecting parts by arranging the plurality of first notches, and when two adjacent battery cells in the same row move relatively, the first sub-connecting parts connected with the two adjacent battery cells can move along with the battery cells, so that the first sub-connecting parts are prevented from being separated from the battery cells, the probability of degumming is reduced, and the service life of the battery cells is prolonged. The defect that an existing pressing strip cannot absorb relative displacement is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a battery core strip, a battery pack and a vehicle. Background Art

[0002] The existing battery pack mainly includes a box body and a battery cell module and a battery cell strip arranged in the box body. The battery cell module is composed of a plurality of arranged battery cells. The battery cell strip is located above the battery cell module and is bonded and fixed to the battery cells.

[0003] When the top or bottom surface of an existing battery pack is impacted, debonding may easily occur, that is, the battery cell and the battery cell molding may separate, thereby affecting the stability and safety of the battery pack.

[0004] Accordingly, this field requires a new technical solution to solve the above problems. Utility Model Content

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem that the existing battery pack is prone to debonding.

[0006] In the first aspect, the utility model provides a battery cell strip, which has a first battery cell connection portion extending along its length direction, the first battery cell connection portion includes a plurality of first sub-connection portions spaced apart along the length direction of the battery cell strip, and the battery cell strip is provided with a first notch between two adjacent first sub-connection portions so that the two adjacent first sub-connection portions can move relative to each other along the thickness direction of the battery cell strip.

[0007] The battery cell bead of the present application divides the first battery cell connection part into multiple first sub-connection parts by setting multiple first notches. The width of the battery cell bead at the position of the first notch becomes smaller, so that two adjacent first sub-connection parts can move relative to each other along the thickness direction of the battery cell bead. In this way, when two adjacent battery cells in the same row move relative to each other, the first sub-connection parts connected thereto can move with the battery cells, which is beneficial to avoid separation of the first sub-connection parts from the battery cells, reduce the probability of debonding, and improve the disadvantage that the existing bead cannot absorb relative displacement.

[0008] In the preferred technical solution of the above-mentioned battery cell bead, the number of the first battery cell connecting portions is two and they are distributed along the width direction of the battery cell bead, and the two first battery cell connecting portions are respectively used to connect to two adjacent rows of battery cells.

[0009] In the preferred technical solution of the above-mentioned battery cell holding strip, the first sub-connection portion can only be connected to one battery cell.

[0010] The battery cell pressure strip of the present application enables the first sub-connection portion to be connected to only one battery cell, so that when relative displacement occurs between two adjacent battery cells in each group in the same row of battery cells, debonding is unlikely to occur.

[0011] In the preferred technical solution of the above-mentioned battery cell strip, the battery cell strip is provided with a buffer structure between the two first battery cell connection parts, the buffer structure extends along the length direction of the battery cell strip, and the buffer structure can be deformed along the thickness direction of the battery cell strip so that the two first battery cell connection parts can move relative to each other along the thickness direction of the battery cell strip.

[0012] The battery cell strip of the present application is provided with a buffer structure between two adjacent first battery cell connection parts. The buffer structure can be deformed along the thickness direction of the battery cell strip, so that the two adjacent first battery cell connection parts can move relative to each other along the thickness direction of the battery cell strip. In this way, when two adjacent rows of battery cells move relative to each other, the first battery cell connection parts connected thereto can move with the battery cells, which is beneficial to avoid separation of the first battery cell connection parts from the battery cells, and is beneficial to further reduce the probability of debonding.

[0013] In the preferred technical solution of the above-mentioned battery cell bead, the buffer structure is a strip-shaped rib formed by one surface of the battery cell bead being recessed toward the other surface of the battery cell bead.

[0014] The battery cell bead of the present application is configured such that the buffer structure is formed by a strip rib that is recessed from one surface of the battery cell bead toward the other surface of the battery cell bead, so that the buffer structure can not only be deformed along the thickness direction of the battery cell bead, but also along the length direction of the battery cell bead, which is beneficial to further reduce the probability of debonding, and is also convenient for processing, which is beneficial to reduce processing costs.

[0015] In the preferred technical solution of the above-mentioned battery cell strip, the battery cell strip is further provided with a second battery cell connection portion extending along the length direction of the battery cell strip between the two first battery cell connection portions, the second battery cell connection portion includes a plurality of second sub-connection portions spaced apart along the length direction of the battery cell strip, the battery cell strip is provided with a second notch between two adjacent second sub-connection portions, the second sub-connection portion and the first sub-connection portion are correspondingly arranged along the width direction of the battery cell strip and are respectively used to connect with the first side and the second side of the battery cell, the number of the second battery cell connection portions is two and they are distributed along the width direction of the battery cell strip, and the two second battery cell connection portions are respectively located on both sides of the buffer structure.

[0016] The battery cell molding of the present application is connected to the battery cell by providing a second battery cell connecting portion, which can improve the connection stability between the battery cell molding and the battery cell. In addition, the second battery cell connecting portion is divided into multiple second sub-connecting portions by multiple second notches, which is conducive to avoiding debonding.

[0017] In the preferred technical solution of the above-mentioned battery cell bead, the first sub-connecting portion is provided with an adhesive layer for bonding to the battery cell; and / or

[0018] The first notch is rectangular, oblong, elliptical or trapezoidal.

[0019] In the preferred technical solution of the above-mentioned battery cell bead, the thickness of the battery cell bead is 1.2 mm to 3.0 mm; and / or

[0020] The width of the battery core bead is 20 mm to 50 mm; and / or

[0021] The width of the first battery cell connecting portion is 10 mm to 15 mm.

[0022] In a second aspect of the present application, a battery pack is further provided, comprising the battery cell molding described in the above technical solution.

[0023] In a third aspect of the present application, a vehicle is also provided, comprising the battery pack described in the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The vehicle and its control method, medium, control device and vehicle of the present application are described below with reference to the accompanying drawings. In the accompanying drawings:

[0025] Figure 1 It is a structural diagram of the battery cell module and battery cell bead of the present application;

[0026] Figure 2 It is a schematic structural diagram of the battery cell of the present application;

[0027] Figure 3 This is a structural diagram of the first embodiment of the battery cell beading of the present application;

[0028] Figure 4 This is a structural diagram of the second embodiment of the battery cell beading of the present application;

[0029] Figure 5 This is a structural diagram of the third embodiment of the battery cell beading of the present application;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the battery cell bead, beam structure and elastic energy-absorbing component of the present application;

[0031] Figure 7 Schematic top view of the battery cell bead, beam structure and elastic energy absorbing member of the present application;

[0032] Figure 8 yes Figure 7 Cross-sectional view at AA in the middle;

[0033] Figure 9 It is a structural schematic diagram of the elastic energy-absorbing component of the present application.

[0034] Reference Signs List

[0035] 1. Battery cell; 11. First side surface; 12. Second side surface; 13. Top surface;

[0036] 2. Cell bead; 21. First cell connection portion; 22. Second cell connection portion; 23. Buffer structure; 24. Through hole; 25. First notch; 26. Second notch; 211. First sub-connection portion; 221. Second sub-connection portion; 231. Sub-buffer structure;

[0037] 3. Beam structure;

[0038] 4. Elastic energy absorbing component; 41. First elastic energy absorbing portion; 42. Second elastic energy absorbing portion. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0040] It should be noted that in the description of this application, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "top," and "bottom" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0041] In addition, it should be noted that in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "set," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] First refer to Figure 1 , describe the battery pack of this application.

[0043] like Figure 1 As shown, the battery pack of the present application includes a box body (not shown in the figure) and a battery cell module and a battery cell strip 2 arranged in the box body.

[0044] Among them, the box body has a receiving portion, and the battery cell module is received in the receiving portion. The box body has an upper cover, which is used to close the top opening of the receiving portion. The battery cell strip 2 is located between the upper cover and the battery cell module, and the lower surface of the battery cell strip 2 (represented as the first surface) is connected to the top surface of the battery cell module.

[0045] In other words, the box is used to provide a storage space for the battery cell module. The box can have a variety of shapes, such as a cube, a rectangular parallelepiped, or a cylinder. Of course, this application prefers to set the battery pack box to a rectangular parallelepiped structure. The internal space of the box forms a receiving portion, which is a cavity structure with an opening at the top. It has a certain storage space. The size and shape of the storage space can be adapted to the battery cell module. In this way, the battery cell module can be stably accommodated in the receiving portion.

[0046] The upper cover can be a flat plate with a raised sealing edge to facilitate connection between the upper cover and the housing. The upper cover fits over the opening of the housing. Both the upper cover and the housing can be made of metal, such as aluminum alloy, to enhance the structural strength of the battery pack.

[0047] The cell bead 2 is a rectangular plate structure, and the cell bead 2 is connected to the top of the cell 1 in the cell module. The specific connection method can be adhesive connection, bolt connection or clamping. Of course, it is preferred to use adhesive connection to connect the cell bead 2 to the cell 1 in the cell module.

[0048] like Figure 1 As shown, the battery module includes multiple rows of battery cells, each row of battery cells includes multiple rows along the first direction ( Figure 1 The battery cells 1 are arranged in the X direction shown in FIG, and the multiple rows of battery cells are arranged in the second direction ( Figure 1 The battery cell strip 2 extends along the first direction, and the first direction is perpendicular to the second direction. It can be understood that the first direction is the length direction of the battery cell strip 2, and the second direction is the width direction of the battery cell strip 2.

[0049] Each row of battery cells can be regarded as a battery cell group, and the number of battery cell groups can be two, three or more. That is, the battery cell module includes at least two battery cell groups, that is, at least two rows of battery cells.

[0050] It should be noted that the multiple battery cells 1 in each row of battery cells are preferably bonded together by gluing, and the battery cells in two adjacent rows can also be bonded by gluing, thereby forming a battery cell module structure with high structural strength and good integrity.

[0051] In addition, it should be noted that the battery cell in this application can be a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. In addition, the battery cell 1 can be a rectangular parallelepiped, a cylinder, a flat body, or other shapes. Of course, this application preferably sets the battery cell 1 to a rectangular parallelepiped structure.

[0052] like Figure 1 and Figure 2 As shown, when arranging the battery cells, the two surfaces of the battery cell 1 with the largest area (recorded as the first side surfaces 11) are arranged opposite to each other along the first direction, and the two first side surfaces 11 of the battery cell 1 are distributed along the thickness direction of the battery cell 1. In each row of battery cells, the first side surfaces 11 of two adjacent battery cells 1 are bonded and fixed to form a battery cell group. The two surfaces of the battery cell 1 with the smallest area (recorded as the second side surfaces 12) are arranged opposite to each other along the second direction, and the two second side surfaces 12 of the battery cell 1 are distributed along the length direction of the battery cell 1. The second side surfaces 12 of two adjacent rows of battery cells are arranged opposite to each other. The remaining two surfaces of the battery cell 1 are recorded as the top surface 13 and the bottom surface of the battery cell 1. The bottom surface of the battery cell 1 is generally bonded and fixed to the bottom plate of the box (which can also be a cooling plate), and the top surface 13 of the battery cell 1 is bonded and fixed to the battery cell strip 2.

[0053] In addition, it should be noted that the battery cell strip 2 can be connected to only one row of battery cells, for example, the battery cell strip 2 located at the edge of the battery cell module, or the battery cell strip 2 can also be connected to two adjacent rows of battery cells, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present application and should be limited within the scope of protection of the present application.

[0054] like Figures 1 to 5 As shown, the battery cell bead 2 of the present application has a first battery cell connecting portion 21 , and the first battery cell connecting portion 21 is connected to the top surface 13 of the battery cell 1 , preferably by adhesive fixation.

[0055] The first cell connection portion 21 is located on the first surface of the cell bead 2 , that is, on the lower surface of the cell bead 2 . During assembly, the cell bead 2 is located above the cell 1 , and the lower surface of the cell bead 2 is bonded and fixed to the top surface 13 of the cell 1 .

[0056] It should be noted that, in the actual assembly process, a layer of glue can be applied to the top surface 13 of the battery cell 1 and then bonded to the battery cell bead 2, or a layer of glue can be provided on the first battery cell connection portion 21 of the battery cell bead 2 and then bonded to the battery cell 1, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this application and should be limited to the scope of protection of this application. Of course, this application preferably provides a glue layer on the first battery cell connection portion 21 of the battery cell bead 2.

[0057] Preferably, if Figures 3 to 5 As shown, the battery cell strip 2 of the present application is provided with a buffer structure 23 between two adjacent first battery cell connection parts 21, and the buffer structure 23 can be deformed along the thickness direction of the battery cell strip 2 so that the two adjacent first battery cell connection parts 21 can move relative to each other along the thickness direction of the battery cell strip 2.

[0058] When the top or bottom of the battery pack is impacted, relative displacement will occur between adjacent battery cells 1. By setting a buffer structure 23 between two adjacent first battery cell connecting parts 21, when relative movement occurs between the two adjacent battery cells 1, the first battery cell connecting parts 21 can move up and down together with the battery cells 1 bonded thereto, thereby helping to avoid debonding and improving the disadvantage that the existing pressure strips cannot absorb relative displacement.

[0059] Example 1, such as Figure 3 As shown, the first battery cell connection portion 21 refers to the portion on the battery cell strip 2 that is connected to the top surface 13 of each row of battery cells. Two first battery cell connection portions 21 are provided on the battery cell strip 2. The two first battery cell connection portions 21 are distributed along the width direction of the battery cell strip 2. The two first battery cell connection portions 21 both extend along the length direction of the battery cell strip 2. The two first battery cell connection portions 21 are respectively used to connect with two adjacent rows of battery cells. The buffer structure 23 extends along the length direction of the battery cell strip 2. The battery cell strip 2 in this example can absorb the relative displacement between the two rows of battery cells.

[0060] Example 2, the first cell connection portion 21 refers to the portion on the cell bead 2 that is connected to the top surface 13 of each cell 1 in the same row of cells. The cell bead 2 is provided with a plurality of first cell connection portions 21, which are distributed along the length direction of the cell bead 2, and the buffer structure 23 extends along the width direction of the cell bead 2 (such as Figure 4 As shown), the number of the buffer structures 23 is multiple and they are spaced apart along the length direction of the battery cell strip 2. The battery cell strip 2 in this example can absorb the relative displacement between adjacent battery cells 1 in the same row of battery cells.

[0061] Example 3, such as Figure 4As shown, Example 3 is a combination of the above-mentioned Examples 1 and 2. The cell molding 2 in this example can absorb the relative displacement between two rows of cells and the relative displacement between adjacent cells 1 in the same row of cells.

[0062] It should be noted that the drawings of this application do not include the battery cell layering structure diagram in Example 2 above. Figure 4 The buffer structure 23 extending along the length direction of the cell bead is shown, and the buffer structure 23 extending along the width direction of the cell bead is shown. Figure 4 The buffer structure 23 extending along the length direction of the battery cell bead is removed, which is the battery cell bead structure diagram in the above example 2.

[0063] It should be noted that the present application does not limit the specific structural form of the buffer structure 23. For example, the buffer structure 23 can be set as a strip rib formed by a recessed surface of the battery cell strip 2 toward the other surface of the battery cell strip 2, or the buffer structure 23 can be set as a corrugated structure, similar to the corrugated structure of a bellows, and so on.

[0064] Preferably, if Figures 3 to 8 As shown, the buffer structure 23 of the present application is a strip-shaped rib formed by one surface of the battery cell molding 2 being recessed toward the other surface of the battery cell molding 2 .

[0065] Among them, the buffer structure 23 can be a strip rib formed by the lower surface of the battery cell strip 2 being recessed toward the upper surface of the battery cell strip 2, or it can also be a strip rib formed by the upper surface of the battery cell strip 2 being recessed toward the lower surface of the battery cell strip 2. The drawings of this application all show strip ribs formed by the lower surface of the battery cell strip 2 being recessed toward the upper surface of the battery cell strip 2.

[0066] Preferably, the dimension of the strip rib along the width direction of the battery cell molding 2 is 5 mm to 25 mm.

[0067] Preferably, the recessed depth of the strip rib is 2 mm to 5 mm.

[0068] Preferably, the width of the first battery cell connecting portion 21 is 10 mm to 15 mm.

[0069] The width of the first battery cell connecting portion 21 refers to the dimension along the width direction of the battery cell holding strip 2 .

[0070] Preferably, if Figure 3 As shown, the buffer structure 23 of the present application includes a plurality of sub-buffer structures 231 spaced apart along the length direction of the battery cell strip 2. The battery cell strip 2 is provided with a through hole 24 between two adjacent sub-buffer structures 231. The through hole 24 passes through the battery cell strip 2 along the thickness direction of the battery cell strip 2.

[0071] That is to say, the buffer structure 23 extends along the length direction of the battery cell bead 2 , but the buffer structure 23 is intermittently arranged along the length direction of the battery cell bead 2 , and the battery cell bead 2 is provided with through holes 24 at positions where the buffer structure 23 is discontinuous.

[0072] It should be noted that the present application does not limit the length of the sub-buffer structure 231. For example, the length of the sub-buffer structure 231 can be equal to the thickness of one battery cell 1, or it can also be equal to the thickness of two or three battery cells 1, and so on. In addition, the present application does not limit the length of the through hole 24. For example, the length of the through hole 24 can be equal to the thickness of one battery cell 1, or it can also be equal to the thickness of two or three battery cells 1.

[0073] Preferably, if Figure 3 As shown, the first cell connecting portion 21 can only be connected to one cell 1 at a portion corresponding to each sub-buffer structure 231 .

[0074] That is to say, the length of the sub-buffer structure 231 is basically the same as the thickness of a battery cell 1 (i.e., the dimension of the battery cell 1 along the length direction of the battery cell strip 2), and the first battery cell connection portion 21 is connected to a battery cell 1 at the part corresponding to the sub-buffer structure 231. Since there is a first battery cell connection portion 21 on each side of the sub-buffer structure 231, the battery cell strip 2 is connected to two battery cells 1 at the position corresponding to each sub-buffer structure 231.

[0075] Preferably, if Figure 3 As shown, the first cell connecting portion 21 can only be connected to one cell 1 at a portion opposite to each through hole 24 .

[0076] That is to say, the length of the through hole 24 is basically the same as the thickness of a battery cell 1, and the first battery cell connecting portion 21 is connected to a battery cell 1 at the part corresponding to the through hole 24. Since there is a first battery cell connecting portion 21 on each side of the through hole 24, the battery cell strip 2 is connected to two battery cells 1 at the position corresponding to each through hole 24.

[0077] Preferably, if Figure 5 and Figure 6 As shown, the first battery cell connection part 21 includes a plurality of first sub-connection parts 211 spaced apart along the length direction of the battery cell strip 2, and the battery cell strip 2 is provided with a first notch 25 between two adjacent first sub-connection parts 211 so that the two adjacent first sub-connection parts 211 can move relative to each other along the thickness direction of the battery cell strip 2.

[0078] That is to say, the first battery cell connection part 21 extends along the length direction of the battery cell strip 2, but the first battery cell connection part 21 is intermittently arranged along the length direction of the battery cell strip 2, and is divided into multiple first sub-connection parts 211 through multiple first notches 25. The first sub-connection part 211 is connected to the battery cell 1. Specifically, a glue layer can be provided on the first sub-connection part 211, and the glue layer is bonded and fixed to the top surface 13 of the battery cell 1. The battery cell strip 2 is not connected to the battery cell 1 at the position of the first notch 25. In addition, since the width of the battery cell strip 2 at the position of the first notch 25 becomes smaller, it is easy to deform. In this way, the two adjacent first sub-connection parts 211 can move relative to each other along the thickness direction of the battery cell strip 2, which is beneficial to avoid degumming.

[0079] It should be noted that if Figure 5 As shown, the above-mentioned buffer structure 23 (extending along the length direction of the battery cell strip 2) and the first notch 25 can be set on the battery cell strip 2 at the same time, or only the buffer structure 23 or the first notch 25 can be set. Of course, the present application preferably sets the buffer structure 23 and the first notch 25 on the battery cell strip 2 at the same time.

[0080] In addition, it should be noted that the present application does not limit the length of the first sub-connection portion 211. For example, the length of the first sub-connection portion 211 can be set to only allow the first sub-connection portion 211 to connect to one battery cell 1, or the length of the first sub-connection portion 211 can be set to only allow the first sub-connection portion 211 to connect to two or three battery cells 1 at the same time, and so on. Such flexible adjustment and change does not deviate from the principle and scope of the present application.

[0081] Preferably, the first sub-connection portion 211 can only be connected to one battery cell 1 .

[0082] That is to say, the dimension of the first sub-connection portion 211 along the length direction of the battery cell strip 2 (i.e., the length of the first sub-connection portion 211) is basically the same as the dimension of the battery cell 1 along the length direction of the battery cell strip 2 (i.e., the thickness of the battery cell 1), and each first sub-connection portion 211 is only bonded and fixed to the top surface 13 of one battery cell 1.

[0083] It should be noted that the present application does not limit the size of the first notch 25, wherein the length of the first notch 25 can be less than, equal to, or greater than the length of the first sub-connection portion 211. Of course, it is preferred that the length of the first notch 25 is substantially the same as the length of the first sub-connection portion 211, so that multiple battery cells in the same row are connected to the battery cell bead 2 every other battery cell.

[0084] In addition, it should be noted that the present application does not limit the specific shape of the first notch 25. For example, the first notch 25 can be set to be rectangular, oblong, elliptical or trapezoidal, etc.

[0085] Preferably, if Figures 5 to 8 As shown, the battery cell bead 2 of the present application is further provided with a second battery cell connection portion 22 extending along the length direction of the battery cell bead 2. The second battery cell connection portion 22 is connected to the second side surface 12 of the battery cell 1, preferably by adhesive fixation. In other words, the second battery cell connection portion 22 and the first battery cell connection portion 21 are respectively used to connect to two different surfaces (referred to as the first surface and the second surface) of the battery cell 1, wherein the first surface is the top surface 13 of the battery cell and the second surface is the second side surface 12 of the battery cell.

[0086] Illustratively, the second cell connecting portion 22 extends vertically downward from the lower surface of the cell holding strip 2 . The second cell connecting portion 22 is also a plate-shaped structure. The second cell connecting portion 22 is perpendicularly arranged to the first cell connecting portion 21 .

[0087] It should be noted that, in the actual assembly process, a layer of glue can be applied to the second side surface 12 of the battery cell 1, and then bonded and fixed to the second battery cell connection portion 22 of the battery cell bead 2, or a layer of glue can be provided on the second battery cell connection portion 22 of the battery cell bead 2, and then bonded and fixed to the second side surface 12 of the battery cell 1, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this application and should be limited to the scope of protection of this application. Of course, it is preferred to provide a glue layer on the second battery cell connection portion 22 of the battery cell bead 2.

[0088] In addition, it should be noted that the number of the second cell connection portion 22 can be one or two. For the cell bead 2 that connects only one row of cells, one second cell connection portion 22 is preferably provided. For the cell bead 2 that connects two adjacent rows of cells, two second cell connection portions 22 are preferably provided. The two second cell connection portions 22 are respectively connected to the two adjacent rows of cells. Figure 5 and Figure 6 As shown, the two second battery cell connecting portions 22 are spaced apart along the width direction of the battery cell holding strip 2 and are located between the two first battery cell connecting portions 21 .

[0089] Preferably, if Figure 5 As shown, the width of the second battery cell connecting portion 22 is 10mm to 15mm. Figure 5 From a top perspective, the width of the second battery cell connecting portion 22 refers to the dimension along the vertical direction.

[0090] Preferably, if Figure 5As shown, the second battery cell connection part 22 of the present application includes a plurality of second sub-connection parts 221 spaced apart along the length direction of the battery cell strip 2, and the battery cell strip 2 is provided with a second notch 26 between two adjacent second sub-connection parts 221. The second sub-connection parts 221 and the first sub-connection parts 211 are arranged correspondingly along the width direction of the battery cell strip 2 and are respectively used to connect with the first surface and the second surface of the battery cell 1 (specifically the top surface 13 and the second side surface 12 of the battery cell).

[0091] Similar to the first battery cell connection part 21, the second battery cell connection part 22 is also preferably arranged intermittently, and the second battery cell connection part 22 is divided into multiple second sub-connection parts 221 by multiple second notches 26. The second sub-connection parts 221 are connected to the battery cell 1. Specifically, a glue layer can be provided on the second sub-connection part 221, and the glue layer is bonded and fixed to the second side surface 12 of the battery cell 1. The battery cell strip 2 is not connected to the battery cell 1 at the position of the second notch 26.

[0092] Among them, the second sub-connection part 221 and the first sub-connection part 211 are arranged correspondingly along the width direction of the battery cell strip 2, which means that, viewed along the width direction of the battery cell strip 2, the positions of the first sub-connection part 211 and the second sub-connection part 221 are the same. In this way, the first sub-connection part 211 and the second sub-connection part 221 can be connected to the first and second surfaces of the same battery cell 1 (specifically, the top surface 13 and the second side surface 12 of the battery cell). Specifically, the first sub-connection part 211 is connected to the top surface 13 of the battery cell 1, and the second sub-connection part 221 is connected to the second side surface 12 of the battery cell 1.

[0093] It should be noted that the present application does not limit the length of the second sub-connection portion 221. For example, the length of the second sub-connection portion 221 can be set to only allow the second sub-connection portion 221 to connect to one battery cell 1, or the length of the second sub-connection portion 221 can be set to only allow the second sub-connection portion 221 to connect to two or three battery cells 1 at the same time, and so on. Such flexible adjustment and change does not deviate from the principle and scope of the present application.

[0094] Preferably, the second sub-connection portion 221 can only be connected to one battery cell 1 .

[0095] That is to say, the dimension of the second sub-connection portion 221 along the length direction of the battery cell strip 2 (i.e., the length of the second sub-connection portion 221) is basically the same as the dimension of the battery cell 1 along the length direction of the battery cell strip 2 (i.e., the thickness of the battery cell 1), and each second sub-connection portion 221 is only bonded and fixed to the second side surface 12 of one battery cell 1.

[0096] It should be noted that the present application does not limit the size of the second notch 26, wherein the length of the second notch 26 can be less than, equal to, or greater than the length of the second sub-connection portion 221. Of course, it is preferred that the length of the second notch 26 is substantially the same as the length of the second sub-connection portion 221, so that the multiple battery cells 1 in the same row of battery cells are connected to the battery cell bead 2 every other battery cell 1.

[0097] In addition, it should be noted that the present application does not limit the specific shape of the second notch 26. For example, the second notch 26 can be set to be rectangular, oblong, elliptical or trapezoidal, etc.

[0098] Preferably, if Figure 5 As shown, there are two second battery cell connecting portions 22 , which are distributed along the width direction of the battery cell molding 2 .

[0099] In the case where two first battery cell connection parts 21 are provided, the number of second battery cell connection parts 22 is preferably two, wherein one first battery cell connection part 21 and the second battery cell connection part 22 are connected to the top surface 13 and the second side surface 12 of the same row of battery cells, and the other first battery cell connection part 21 and the second battery cell connection part 22 are connected to the top surface 13 and the second side surface 12 of another row of battery cells.

[0100] Further, if Figures 5 to 8 As shown, in a case where a buffer structure 23 is provided between the two first battery cell connecting portions 21 , the two second battery cell connecting portions 22 are respectively located on both sides of the buffer structure 23 .

[0101] That is to say, the first battery cell connection part 21 and the second battery cell connection part 22 located on one side of the buffer structure 23 are a group, which are connected to the battery cells 1 in the same row, and the first battery cell connection part 21 and the second battery cell connection part 22 located on the other side of the buffer structure 23 are a group, which are connected to the battery cells 1 in another row. The first battery cell connection part 21 and the second battery cell connection part 22 on one side of the buffer structure 23 and the first battery cell connection part 21 and the second battery cell connection part 22 on the other side of the buffer structure 23 can move relative to each other along the thickness direction of the first battery cell connection part 21 of the battery strip 2.

[0102] It should be noted that the present application does not limit the specific material of the battery cell bead 2 . For example, the battery cell bead 2 may be made of metal or composite materials.

[0103] Preferably, the thickness of the battery cell bead 2 is 1.2 mm to 3.0 mm.

[0104] Preferably, the width of the battery cell bead 2 is 20 mm to 50 mm.

[0105] Preferably, if Figure 6As shown, a beam structure 3 is provided in the box body, and the beam structure 3 is located between the upper cover and the bottom plate of the box body, wherein the beam structure 3 mainly includes a horizontal beam and a longitudinal beam. The horizontal beam refers to the beam structure 3 extending along the width direction of the box body, and the longitudinal beam refers to the beam structure 3 extending along the length direction of the box body. The horizontal beam and the longitudinal beam are arranged vertically, and the horizontal beam and the longitudinal beam divide the receiving part in the box body into multiple sub-receiving parts, and each sub-receiving part can be installed with one row of battery cells or multiple rows of battery cells.

[0106] It should be noted that only horizontal beams may be provided in the box of the battery pack, or only vertical beams may be provided, or both horizontal beams and vertical beams may be provided.

[0107] The beam structure 3 is located between two adjacent rows of battery cells 1 , and the battery cell bead 2 is located above the beam structure 3 . The extending direction of the beam structure 3 is the same as that of the battery cell bead 2 , and the two are approximately parallel.

[0108] Preferably, if Figures 6 to 9 As shown, the battery pack of the present application further includes an elastic energy-absorbing member 4 disposed in the box body, and the elastic energy-absorbing member 4 is located between the battery cell molding 2 and the beam structure 3 .

[0109] That is to say, an elastic energy absorbing component 4 is provided between the beam structure 3 and the battery cell strip 2, and the top surface of the elastic energy absorbing component 4 is preferably in contact with the lower surface of the battery cell strip 2, and the bottom surface of the elastic energy absorbing component 4 is preferably in contact with the top surface of the beam structure 3.

[0110] It should be noted that the present application does not limit the specific structural form of the elastic energy absorbing member 4. For example, the elastic energy absorbing member 4 can be set as a rubber pad or foam, etc.

[0111] Preferably, if Figures 7 to 9 As shown, the elastic energy absorbing member 4 includes a first elastic energy absorbing portion 41 located between the buffer structure 23 and the beam structure 3 and a second elastic energy absorbing portion 42 located between the second battery cell connecting portion 22 and the beam structure 3 .

[0112] That is to say, when a buffer structure 23 and a second battery cell connecting part 22 are provided on the battery cell strip 2, a part of the elastic energy absorbing member 4 (recorded as the first elastic energy absorbing part 41) is arranged between the buffer structure 23 and the beam structure 3, and another part (recorded as the second elastic energy absorbing part 42) is arranged between the second battery cell connecting part 22 and the beam structure 3. Specifically, the first elastic energy absorbing part 41 is located between the buffer structure 23 and the top surface of the beam structure 3, and the second elastic energy absorbing part 42 is located between the second battery cell connecting part 22 and the side of the beam structure 3.

[0113] In the case where two second battery cell connecting parts 22 are provided, the number of the second elastic energy absorbing parts 42 is preferably two, the beam structure 3 is located between the two second battery cell connecting parts 22, the two second elastic energy absorbing parts 42 are respectively located on the left and right sides of the beam structure 3, the tops of the two second elastic energy absorbing parts 42 are respectively connected to the left and right sides of the first elastic energy absorbing part 41, and the cross-section of the elastic energy absorbing component 4 is approximately an inverted U-shaped structure.

[0114] It should be noted that, in actual applications, those skilled in the art may configure the first elastic energy absorbing portion 41 and the second elastic energy absorbing portion 42 as two independent components, or may configure the first elastic energy absorbing portion 41 and the second elastic energy absorbing portion 42 as an integrated component. Of course, it is preferred that the first elastic energy absorbing portion 41 and the second elastic energy absorbing portion 42 are configured as an integrated component. During assembly, the elastic energy absorbing member 4 may be first invertedly attached to the beam structure 3.

[0115] Furthermore, it should be noted that the second elastic energy absorbing portion 42 is not essential. In practical applications, those skilled in the art may eliminate the second elastic energy absorbing portion 42, that is, only provide an elastic energy absorbing member between the buffer structure 23 and the beam structure 3. Of course, the present application preferably retains the second elastic energy absorbing portion 42.

[0116] Finally, the present application also provides a vehicle comprising the battery pack described above.

[0117] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0118] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A battery cell bead, characterized in that: The battery cell strip has a first battery cell connection portion extending along its length direction, the first battery cell connection portion includes a plurality of first sub-connection portions spaced apart along the length direction of the battery cell strip, and the battery cell strip is provided with a first notch between two adjacent first sub-connection portions so that the two adjacent first sub-connection portions can move relative to each other along the thickness direction of the battery cell strip.

2. The battery cell bead according to claim 1, characterized in that: The number of the first battery cell connecting portions is two and they are distributed along the width direction of the battery cell layer, and the two first battery cell connecting portions are respectively used to connect to two adjacent rows of battery cells.

3. The battery cell bead according to claim 1, characterized in that: The first sub-connection portion can only be connected to one battery cell.

4. The battery cell bead according to claim 2, characterized in that: The battery cell strip is provided with a buffer structure between the two first battery cell connection parts, and the buffer structure extends along the length direction of the battery cell strip. The buffer structure can be deformed along the thickness direction of the battery cell strip so that the two first battery cell connection parts can move relative to each other along the thickness direction of the battery cell strip.

5. The battery cell bead according to claim 4, characterized in that: The buffer structure is a strip-shaped rib formed by one surface of the battery cell bead being recessed toward the other surface of the battery cell bead.

6. The battery cell bead according to claim 4, characterized in that: The battery cell strip is also provided with a second battery cell connection portion extending along the length direction of the battery cell strip between the two first battery cell connection portions, the second battery cell connection portion includes a plurality of second sub-connection portions spaced apart along the length direction of the battery cell strip, the battery cell strip is provided with a second notch between two adjacent second sub-connection portions, the second sub-connection portion and the first sub-connection portion are correspondingly arranged along the width direction of the battery cell strip and are respectively used to connect with the first side and the second side of the battery cell, the number of the second battery cell connection portions is two and they are distributed along the width direction of the battery cell strip, and the two second battery cell connection portions are respectively located on both sides of the buffer structure.

7. The battery cell bead according to claim 1, characterized in that: The first sub-connecting portion is provided with an adhesive layer for bonding to the battery core; and / or The first notch is rectangular, oblong, elliptical or trapezoidal.

8. The battery cell bead according to claim 1, characterized in that: The thickness of the battery core layer is 1.2 mm to 3.0 mm; and / or The width of the battery core bead is 20 mm to 50 mm; and / or The width of the first battery cell connecting portion is 10 mm to 15 mm.

9. A battery pack, characterized in that: The battery cell strip comprises the battery cell strip according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Including the battery pack according to claim 9.

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