Connection assembly, battery pack, and vehicle

Abstract

This application relates to the field of battery structure technology and discloses a connecting component, a battery pack, and a carrier, suitable for connecting two adjacent battery cells. Each battery cell includes a housing and at least one cover plate. At least one of the top and bottom surfaces of the housing along a first direction is open, and the cover plate seals the opening along the first direction. The connecting component includes a sheet body with at least one connecting portion. The sheet body is adapted to be located between two adjacent battery cells. Two opposing sides on the connecting portion are adapted to connect to the two housings respectively and are spaced apart from the two cover plates. This reduces the probability of fatigue failure in the battery cells, thereby improving the service life of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery structure technology, specifically to connection components, battery packs, and carriers. Background Technology

[0002] A battery pack is an integrated unit that combines multiple battery cells in series and parallel, and is equipped with components such as a battery management system and heat dissipation device. It can improve battery capacity and output voltage, realize charge and discharge control, temperature monitoring and safety protection, and is widely used in new energy vehicles, energy storage power stations, portable devices and other fields. It is a key component for energy storage and supply.

[0003] In related technologies, battery packs typically contain multiple battery modules, and each battery module contains multiple rows of individual battery cells. To improve the vibration resistance of the battery pack, adjacent rows of batteries are connected using connecting components (such as adhesive foam). However, during vertical vibration, the two rows of individual battery cells generate alternating tensile and compressive forces through the connecting components, causing fatigue failure at the connection between the top cover and the shell of the individual battery cells, thus reducing the service life of the battery pack. Utility Model Content

[0004] This application provides a connection component, a battery pack, and a carrier that can reduce the probability of fatigue failure of individual battery cells, thereby improving the service life of the battery pack.

[0005] On one hand, this application provides a connecting assembly suitable for connecting two adjacent battery cells. The battery cell includes a housing and at least one cover plate. At least one of the top and bottom surfaces of the housing along a first direction is open. The cover plate covers the opening along the first direction. The connecting assembly includes a sheet body with at least one connecting portion. The sheet body is adapted to be located between two adjacent battery cells. Two opposing sides of the connecting portion are adapted to be connected to the two housings respectively and are spaced apart from the two cover plates.

[0006] Beneficial effects: The connection between the two battery cells enhances their overall integrity. When the battery pack experiences up-and-down vibrations, the force exerted by the connection component on the connection between the battery cell housing and the cover plate is reduced due to the connection between the connection component and the housing and cover plate. This reduces stress concentration at the connection point, lowers the risk of battery cell cracking, reduces battery cell fatigue failure, and improves the service life of the battery pack.

[0007] In an optional embodiment, an adhesive layer is provided on both opposite sides of the connecting portion.

[0008] In an alternative embodiment, the adhesive layer includes a plurality of connecting strips, which are spaced apart along the first direction.

[0009] In an alternative embodiment, within one of the adhesive layers, the width of the plurality of connecting strips gradually decreases along the first direction in the direction close to the cover plate;

[0010] And / or, in one of the adhesive layers, the spacing between two adjacent connecting strips gradually increases along the first direction, near the cover plate.

[0011] In an alternative embodiment, the sheet body further has an isolation portion that contacts at least a portion of the side surface of the cover plate of two adjacent battery cells; and / or, the sheet body is an insulating sheet.

[0012] Secondly, this application also provides a battery pack, including battery cells and a connection assembly in any of the above embodiments; multiple battery cells are provided, each battery cell including a housing and at least one cover plate, at least one of the top and bottom surfaces of the housing along a first direction is open, and the cover plate covers the opening along the first direction; the connection assembly connects two adjacent battery cells.

[0013] In an optional embodiment, multiple battery cells are grouped to form multiple battery packs, with multiple battery cells within each battery pack arranged along a second direction and multiple battery packs arranged along a third direction; wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] In an optional embodiment, the chip body is provided with a plurality of the connecting portions, which are spaced apart along a second direction; any two adjacent battery packs are connected by at least one of the connecting components.

[0015] In an alternative embodiment, the two battery cells are located in two adjacent battery packs, and the two adjacent battery cells are connected by one of the connecting components.

[0016] Thirdly, this application also provides a carrier, including the battery pack described in the above embodiments, thus possessing the same technical effects as the battery pack. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of several battery cells in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a connection component according to an embodiment of this application;

[0020] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the connection component and the battery cell in an embodiment of this application;

[0022] Figure 5 for Figure 4 Top view of the connection component and the battery cell in action;

[0023] Figure 6 for Figure 5 Sectional view at point BB;

[0024] Figure 7 for Figure 6 A magnified view of a section at point C;

[0025] Figure 8 This is a schematic diagram of another connection component according to an embodiment of this application;

[0026] Figure 9 This is a schematic diagram of another connection component according to an embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the back structure of another connecting component according to an embodiment of this application;

[0028] Figure 11 This is a front view of the connection component and the battery cell in an embodiment of this application;

[0029] Figure 12 This is a left view of the connection component and the battery cell in an embodiment of this application;

[0030] Figure 13 This is a schematic diagram of the structure of a battery pack according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] X, first direction; Y, second direction; Z, third direction;

[0033] 1. Connecting components; 2. Battery cells; 3. Housing; 4. Top cover;

[0034] 11. Sheet body; 111. Connecting part; 1111. Adhesive layer; 11111. Connecting strip; 112. Isolation part;

[0035] 21. Cover plate; 22. Shell;

[0036] 31. Liquid cooling plate; 32. Bottom protective plate. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In related technologies, a battery pack is an integrated unit that combines multiple battery cells in series and parallel, and is equipped with components such as a battery management system and heat dissipation device. It can improve battery capacity and output voltage, realize charge and discharge control, temperature monitoring and safety protection, and is widely used in new energy vehicles, energy storage power stations, portable devices and other fields. It is a key component for power storage and supply.

[0040] Battery packs typically contain multiple battery modules, each containing multiple rows of individual battery cells. To improve the vibration resistance of the battery pack, adjacent rows of batteries are connected using connectors (such as adhesive foam). However, during vertical vibration, the two rows of battery cells generate alternating tensile and compressive forces through the connectors, leading to fatigue failure at the connection between the top cover and the casing of the individual battery cells, thus reducing the service life of the battery pack.

[0041] To address the aforementioned issues, this application provides a connection component, a battery pack, and a carrier that can reduce the probability of fatigue failure in individual battery cells, thereby improving the lifespan of the battery pack.

[0042] The following is combined Figures 1 to 13 This describes an embodiment of the present application.

[0043] According to embodiments of this application, on the one hand, such as Figures 1 to 7 and Figure 13 As shown, a battery pack is provided, such as Figure 13 As shown, it includes: a housing 3, a top cover 4, multiple battery cells 2 and at least one connecting component 1, and the specific scheme is as follows.

[0044] like Figure 13 As shown, the housing 3 is made of aluminum alloy, and the top of the housing 3 is open. The housing 3 is equipped with a partition assembly to form multiple accommodating spaces. The top cover 4 is made of high-strength steel or composite material. The top cover 4 is bolted to the top opening of the housing 3. The bottom of the housing 3 is provided with a liquid cooling plate 31 and a bottom protective plate 32. The liquid cooling plate 31 is made of aluminum alloy, and the bottom protective plate 32 is made of any one of high-strength steel, hot-formed steel, and composite material. Specifically, the number of accommodating spaces is 2 to 4, preferably 2 or 4.

[0045] like Figure 13 As shown, Figure 13 Only a portion of the battery cells 2 are shown; there are multiple battery cells 2; specifically, the battery cells 2 are grouped to form multiple battery packs, and the multiple battery cells 2 in the battery packs are arranged along the second direction Y, and the multiple battery packs are arranged along the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0046] More specifically, such as Figure 13 As shown, multiple battery packs arranged along the third direction Z form a battery module. A battery module is installed in an accommodating space. Preferably, two battery packs form a battery module.

[0047] like Figure 1As shown, the battery cell 2 includes a housing 22 and at least one cover plate 21. At least one of the top and bottom surfaces of the housing 22 along the first direction X is open, and the cover plate 21 covers the opening along the first direction X. In one specific embodiment, the top surface of the housing 22 is open, and the cover plate 21 is sealed to the opening on the top surface of the housing 22 by welding or other adhesive methods. In another specific embodiment, the bottom surface of the housing 22 is open, and the cover plate 21 is sealed to the opening on the bottom surface of the housing 22 by welding or other adhesive methods. In yet another specific embodiment, both the bottom and top surfaces of the housing 22 are open, and both cover plates 21 are sealed to the openings on the top and bottom surfaces of the housing 22 by welding or other adhesive methods, respectively.

[0048] like Figure 2 As shown, the connecting component 1 includes a sheet body 11, and the sheet body 11 has at least one connecting portion 111.

[0049] It should be noted that, as Figure 9 As shown, when there are multiple connecting parts 111, they are respectively adapted to be connected to the housing 22 of multiple adjacent battery cells 2.

[0050] Specifically, the connecting component 1 can be foam with adhesive on both sides, or it can be a film formed by coating on the side of the housing 22 of a battery cell 2, or any other form of connecting component 1, as long as it can connect two battery cells 2.

[0051] In this configuration, at least one pair of adjacent battery cells 2 are provided with a connecting component 1, and two opposite sides of the connecting part 111 are respectively connected to the housing 22 and spaced apart from the cover plate 21.

[0052] It should be noted that in the above-mentioned "at least one pair of adjacent battery cells 2 are provided with a connecting component 1, and the two opposite sides of the connecting part 111 are respectively connected to the housing 22 and are spaced apart from the cover plate 21", the two adjacent battery cells 2 can be two adjacent battery cells 2 located in the same row, or they can be two adjacent battery cells 2 located in different rows.

[0053] In this embodiment, such as Figures 1 to 7 and Figure 13As shown, the two battery cells 2 connected by the connecting component 1 enhance the overall integrity of the two battery cells 2. When the battery pack is subjected to up-and-down vibration, since the connecting component 1 is connected to the housing 22 of the battery cell 2 and spaced apart from the cover plate 21, the force exerted by the connecting component 1 on the connection between the housing 22 and the cover plate 21 can be reduced, thereby reducing the stress concentration at the connection between the housing 22 and the cover plate 21, reducing the risk of cracking of the battery cell 2, that is, reducing the fatigue failure of the battery cell 2, and improving the service life of the battery pack.

[0054] In one embodiment, such as Figure 2 and Figure 3 As shown, adhesive layers 1111 are provided on two opposing sides of the connecting part 111, and the two opposing adhesive layers 1111 are respectively bonded to the housing 22 of two adjacent battery cells 2.

[0055] Specifically, the sheet body 11 is an insulating sheet; more specifically, the sheet body 11 is foam, such as: silicone foam sheet, silicone sheet, XPP sheet (XPP, cross-linked polypropylene foam material), MPP sheet (MPP, Microcellular Polypropylene Foam), aerogel sheet, etc., preferably ceramicized silicone foam sheet; the adhesive layer 1111 is specifically double-sided adhesive or pressure-sensitive adhesive, etc.

[0056] In this embodiment, adhesive layers 1111 are provided on both sides of the sheet body 11 to form a connecting part 111, which has a simple structure and is easy to manufacture.

[0057] In one embodiment, such as Figure 8 As shown, the adhesive layer 1111 includes a plurality of connecting strips 11111, which are spaced apart along the first direction X.

[0058] Specifically, the connecting strip 11111 is a piece of film, and the distance between adjacent connecting strips 11111 can be selected and set according to actual needs.

[0059] It should be noted that the bonding strength of the multiple connecting strips 11111 can be different or the same. Preferably, the bonding strength of the connecting strips 11111 gradually decreases along the direction close to the cover plate 21.

[0060] In this embodiment, such as Figure 8 As shown, the adhesive layer 1111 includes multiple connecting strips 11111, which are spaced apart along the direction close to the cover plate 21. By changing the bonding strength of the connecting strips 11111, the force limit of the adhesive layer 1111 on the shell 22 can be reduced, thereby reducing the force on the shell 22 near the cover plate 21 and reducing the probability of battery cell 2 failure.

[0061] In one embodiment, such as Figure 8 or Figure 9 As shown, in an adhesive layer 1111, along the direction close to the cover plate 21, the width of multiple connecting strips 11111 gradually decreases along the first direction X; specifically, along the direction close to the cover plate 21, the width of the multiple connecting strips 11111 is narrower than the previous one, and the width difference between two adjacent strips can be the same or different.

[0062] And / or, such as Figure 8 or Figure 9 As shown, in an adhesive layer 1111, the spacing between two adjacent connecting strips 11111 gradually increases along the first direction X, near the cover plate 21. Specifically, the spacing difference between adjacent connecting strips 11111 can be the same or different along the direction near the cover plate 21.

[0063] In this embodiment, the width of multiple connecting strips 11111 gradually decreases along the direction close to the cover plate 21, and the spacing between adjacent connecting strips 11111 gradually increases. This can gradually reduce the connection strength of the connecting part 111 to the part of the housing 22 close to the cover plate 21. The solution is simple and easy to operate.

[0064] In one embodiment, such as Figure 2 and Figure 6 As shown, the sheet body 11 also has an isolation portion 112, which is in contact with at least a portion of the side of the cover plate 21 of two adjacent battery cells 2. Specifically, the isolation portion 112 is in contact with the cover plate 21, that is, the isolation portion 112 and the cover plate 21 are not connected, but only serve to isolate the two adjacent battery cells 2 from contact.

[0065] It should be noted that "the isolation part 112 is in at least partial contact with the cover plate 21" means that the isolation part 112 is in contact with a part of the side of the cover plate 21, or it can be in contact with the entire side of the cover plate 21. Of course, the area of ​​the isolation part 112 can be larger than the side of the cover plate 21.

[0066] In this embodiment, such as Figure 2 and Figure 6 As shown, by setting the isolation part 112 to contact the cover plate 21, it is possible to avoid the cover plates 21 on two adjacent battery cells 2 from contacting and squeezing each other, thus playing a buffering role.

[0067] In some embodiments not shown, the sheet body 11 is provided with an isolation portion 112, which contacts the housing 22. That is, the isolation portion 112 may or may not contact the cover plate 21.

[0068] In one embodiment, such as Figure 9 and Figure 10 As shown, the sheet body 11 is provided with a plurality of connecting parts 111, which are spaced apart along the second direction Y; specifically, the distance between adjacent connecting parts 111 can be set according to actual needs.

[0069] In specific usage, such as Figure 9 and Figure 10 As shown, taking a battery pack as an example, the battery pack contains multiple battery modules, and each battery module contains two rows of battery cells 2. Each row of battery cells 2 is arranged along the first direction X. In the two rows of battery cells 2, if one battery cell 2 in one row of battery cells 2 is adjacent to one battery cell 2 in the other row of battery cells 2, then they form a group of adjacent battery cells 2.

[0070] At least one connecting component 1 is arranged in the first direction X between the two rows of battery cells 2. Multiple sets of adjacent battery cells 2 in the two rows of battery cells 2 are connected by multiple connecting parts 111 on the connecting component 1.

[0071] In this embodiment, connecting two adjacent rows of battery cells 2 with at least one connecting component 1 can improve the overall integrity between the two rows of battery cells 2; and the connecting component 1 is provided with a plurality of connecting parts 111 along the first direction X, which can reduce the amount of adhesive layer 1111 used, thereby reducing costs.

[0072] In one embodiment, any two adjacent battery packs are connected by at least one connecting component 1. Specifically, in two adjacent battery packs, several battery cells 2 arranged side by side in one battery pack can be connected to several battery cells 2 arranged side by side in another battery pack through a connecting component 1; alternatively, one battery cell 2 in one battery pack can be connected to one battery cell 2 in another battery pack through a connecting component 1.

[0073] In this embodiment, since the narrow side of a single battery cell 2 is close to the narrow side of a single battery cell 2 in an adjacent battery pack, the displacement between adjacent rows of single battery cells 2 is relatively large during the bumping and vibration of the battery pack.

[0074] Thus, by connecting any two adjacent battery packs through at least one connecting component 1, the integrity of the two adjacent battery packs can be enhanced, thereby reducing the vibration amplitude of the battery cell 2 and reducing the probability of damage to the battery cell 2 due to bumps and vibrations.

[0075] In one embodiment, such as Figure 4As shown, the two adjacent battery cells 2 are located in two adjacent battery packs and are connected by a connecting component 1; that is, a connecting component 1 is located between two adjacent battery packs and connects the two adjacent battery cells 2 located in the two battery packs.

[0076] Specifically, such as Figure 11 As shown, the length D of the connecting portion 111 along the first direction X is 40% to 95% of the height E of the battery cell 2 along the first square; and / or, as Figure 11 As shown, the length F of the connecting portion 111 along the second direction Y is 90% to 110% of the length H of the battery cell 2 along the second direction Y; and / or, as Figure 11 As shown, the distance K between the plate body 11 and the top surface of the housing 22 is ±5mm; and / or, as Figure 12 As shown, the distance M between the sheet body 11 and the bottom surface of the housing 22 is 0~20mm; the thickness N of the sheet body 11 is 0.8mm~2mm; and / or, as Figure 12 As shown, the thickness T of the adhesive layer 1111 is 0.01mm~0.2mm.

[0077] In this embodiment, two adjacent battery cells 2 are located in two adjacent battery packs and connected by a connecting component 1, which realizes a one-to-one connection between the two battery packs and between adjacent battery cells 2. This can reduce the position of the battery cells 2 during bumps and vibrations and facilitate disassembly and maintenance during the maintenance process.

[0078] In one embodiment, such as Figures 1 to 7 and Figure 13 As shown, a battery pack is provided, such as Figure 13 As shown, it includes: a housing 3, a top cover 4, multiple battery cells 2 and at least one connecting component 1, and the specific scheme is as follows.

[0079] like Figure 13 As shown, the housing 3 is made of aluminum alloy, and the top of the housing 3 is open. The housing 3 is equipped with a partition assembly to form multiple accommodating spaces. The top cover 4 is made of high-strength steel or composite material. The top cover 4 is bolted to the top opening of the housing 3. The bottom of the housing 3 is provided with a liquid cooling plate 31 and a bottom protective plate 32. The liquid cooling plate 31 is made of aluminum alloy, and the bottom protective plate 32 is made of any one of high-strength steel, hot-formed steel, and composite material. Specifically, the number of accommodating spaces is 2 to 4, preferably 2 or 4.

[0080] like Figure 13 As shown, Figure 13Only a portion of the battery cells 2 are shown; there are multiple battery cells 2; specifically, the battery cells 2 are grouped to form multiple battery packs, and the multiple battery cells 2 in the battery packs are arranged along the second direction Y, and the multiple battery packs are arranged along the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0081] More specifically, such as Figure 13 As shown, multiple battery packs arranged along the third direction Z form a battery module. A battery module is installed in an accommodating space. Preferably, two battery packs form a battery module.

[0082] like Figure 1 As shown, the battery cell 2 includes a housing 22 and at least one cover plate 21. At least one of the top and bottom surfaces of the housing 22 along the first direction X is open, and the cover plate 21 covers the opening along the first direction X. In one specific embodiment, the top surface of the housing 22 is open, and the cover plate 21 is sealed to the opening on the top surface of the housing 22 by welding or other adhesive methods. In another specific embodiment, the bottom surface of the housing 22 is open, and the cover plate 21 is sealed to the opening on the bottom surface of the housing 22 by welding or other adhesive methods. In yet another specific embodiment, both the bottom and top surfaces of the housing 22 are open, and both cover plates 21 are sealed to the openings on the top and bottom surfaces of the housing 22 by welding or other adhesive methods, respectively.

[0083] like Figure 2 As shown, the connecting component 1 includes a sheet body 11, and the sheet body 11 has at least one connecting portion 111.

[0084] It should be noted that, as Figure 9 As shown, when there are multiple connecting parts 111, they are respectively adapted to be connected to the housing 22 of multiple adjacent battery cells 2.

[0085] Specifically, the connecting component 1 can be foam with adhesive on both sides, or it can be a film formed by coating on the side of the housing 22 of a battery cell 2, or any other form of connecting component 1, as long as it can connect two battery cells 2.

[0086] In this configuration, at least one pair of adjacent battery cells 2 are provided with a connecting component 1, and two opposite sides of the connecting part 111 are respectively connected to the housing 22 and spaced apart from the cover plate 21.

[0087] It should be noted that in the above-mentioned "at least one pair of adjacent battery cells 2 are provided with a connecting component 1, and the two opposite sides of the connecting part 111 are respectively connected to the housing 22 and are spaced apart from the cover plate 21", the two adjacent battery cells 2 can be two adjacent battery cells 2 located in the same row, or they can be two adjacent battery cells 2 located in different rows.

[0088] More specifically, such as Figure 2 and Figure 3 As shown, adhesive layers 1111 are provided on two opposing sides of the connecting part 111, and the two opposing adhesive layers 1111 are respectively bonded to the housing 22 of two adjacent battery cells 2.

[0089] Specifically, the sheet body 11 is an insulating sheet; more specifically, the sheet body 11 is foam, such as: silicone foam sheet, silicone sheet, XPP sheet (XPP, cross-linked polypropylene foam material), MPP sheet (MPP, Microcellular Polypropylene Foam), aerogel sheet, etc., preferably ceramicized silicone foam sheet; the adhesive layer 1111 is specifically double-sided adhesive or pressure-sensitive adhesive, etc.

[0090] More specifically, such as Figure 8 As shown, the adhesive layer 1111 includes a plurality of connecting strips 11111, which are spaced apart along the first direction X.

[0091] Specifically, the connecting strip 11111 is a piece of film, and the distance between adjacent connecting strips 11111 can be selected and set according to actual needs.

[0092] It should be noted that the bonding strength of the multiple connecting strips 11111 can be different or the same. Preferably, the bonding strength of the connecting strips 11111 gradually decreases along the direction close to the cover plate 21.

[0093] More specifically, such as Figure 8 or Figure 9 As shown, in an adhesive layer 1111, along the direction close to the cover plate 21, the width of multiple connecting strips 11111 gradually decreases along the first direction X; specifically, along the direction close to the cover plate 21, the width of the multiple connecting strips 11111 is narrower than the previous one, and the width difference between two adjacent strips can be the same or different.

[0094] like Figure 8 or Figure 9As shown, in an adhesive layer 1111, the spacing between two adjacent connecting strips 11111 gradually increases along the first direction X, near the cover plate 21. Specifically, the spacing difference between adjacent connecting strips 11111 can be the same or different along the direction near the cover plate 21.

[0095] More specifically, such as Figure 2 and Figure 6 As shown, the sheet body 11 also has an isolation portion 112, which is in contact with at least a portion of the side of the cover plate 21 of two adjacent battery cells 2. Specifically, the isolation portion 112 is in contact with the cover plate 21, that is, the isolation portion 112 and the cover plate 21 are not connected, but only serve to isolate the two adjacent battery cells 2 from contact.

[0096] It should be noted that "the isolation part 112 is in at least partial contact with the cover plate 21" means that the isolation part 112 is in contact with a part of the side of the cover plate 21, or it can be in contact with the entire side of the cover plate 21. Of course, the area of ​​the isolation part 112 can be larger than the side of the cover plate 21.

[0097] More specifically, any two adjacent battery packs are connected by at least one connecting component 1. Specifically, in two adjacent battery packs, several consecutive battery cells 2 in one battery pack can be connected to several consecutive battery cells 2 in another battery pack through a connecting component 1; or, one battery cell 2 in one battery pack can be connected to one battery cell 2 in another battery pack through a connecting component 1.

[0098] More specifically, such as Figure 4 As shown, the two adjacent battery cells 2 are located in two adjacent battery packs and are connected by a connecting component 1; that is, a connecting component 1 is located between two adjacent battery packs and connects the two adjacent battery cells 2 located in the two battery packs.

[0099] Specifically, such as Figure 11 As shown, the length D of the connecting portion 111 along the first direction X is 40% to 95% of the height E of the battery cell 2 along the first square; and / or, as Figure 11 As shown, the length F of the connecting portion 111 along the second direction Y is 90% to 110% of the length H of the battery cell 2 along the second direction Y; and / or, as Figure 11 As shown, the distance K between the plate body 11 and the top surface of the housing 22 is ±5mm; and / or, as Figure 12 As shown, the distance M between the sheet body 11 and the bottom surface of the housing 22 is 0~20mm; the thickness N of the sheet body 11 is 0.8mm~2mm; and / or, as Figure 12As shown, the thickness T of the adhesive layer 1111 is 0.01mm~0.2mm.

[0100] According to an embodiment of this application, in another aspect, a carrier is provided, including: the battery pack in any of the above embodiments.

[0101] Specifically, the vehicle can be a new energy passenger vehicle, such as a car or a drone.

[0102] In this embodiment, since the vehicle includes a battery pack and has the same technical effects as the battery pack, it will not be described in detail here.

[0103] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A connection assembly adapted to connect two adjacent battery cells (2), the battery cells (2) comprising a housing (22) and at least one cover plate (21), at least one of the top and bottom faces of the housing (22) in a first direction (X) is open, and the cover plate (21) covers the opening in the first direction (X), characterized in that, The connection component (1) includes: The sheet body (11) has at least one connecting portion (111); the sheet body (11) is adapted to be located between two adjacent battery cells (2), and two opposite sides of the connecting portion (111) are adapted to be connected to two housings (22) and spaced apart from two cover plates (21).

2. The connection assembly of claim 1, wherein, An adhesive layer (1111) is provided on both opposite sides of the connecting part (111).

3. The connection assembly of claim 2, wherein, The adhesive layer (1111) includes a plurality of connecting strips (11111), which are spaced apart along the first direction (X).

4. The connection assembly of claim 3, wherein, In one of the adhesive layers (1111), along the direction close to the cover plate (21), the width of the plurality of connecting strips (11111) gradually decreases along the first direction (X); And / or, in one of the adhesive layers (1111), along the direction close to the cover plate (21), the spacing between two adjacent connecting strips (11111) gradually increases along the first direction (X).

5. The connection assembly according to any one of claims 1 to 4, characterized in that The sheet body (11) also has an isolation portion (112) which is disposed in contact with at least a portion of the side surface of the cover plate (21) of two adjacent battery cells (2); And / or, the sheet body (11) is an insulating sheet.

6. A battery pack, characterized by, include: A battery cell (2) is provided in multiple units. The battery cell (2) includes a housing (22) and at least one cover plate (21). At least one of the top and bottom surfaces of the housing (22) along the first direction (X) is open. The cover plate (21) covers the opening along the first direction (X). At least one connection component (1) as described in any one of claims 1 to 5, the connection component (1) connecting two adjacent battery cells (2).

7. The battery pack of claim 6, wherein, Multiple battery cells (2) are grouped to form multiple battery packs, and the multiple battery cells (2) in the battery packs are arranged along a second direction (Y), and the multiple battery packs are arranged along a third direction (Z); Wherein, the first direction (X), the second direction (Y), and the third direction (Z) are perpendicular to each other.

8. The battery pack of claim 7, wherein, The sheet body (11) is provided with a plurality of connecting portions (111), and the plurality of connecting portions (111) are spaced apart along the second direction (Y); Any two adjacent battery packs are connected by at least one of the connecting components (1).

9. The battery pack of claim 7, wherein, Two adjacent battery cells (2) located in two adjacent battery packs are connected by a connection component (1).

10. A carrier, characterized by include: The battery pack as described in any one of claims 6 to 9.

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