Battery cell assembly, battery and vehicle

Abstract

A battery cell assembly (100), a battery and a vehicle. The battery cell assembly (100) comprises: a battery cell body (10); and an insulating film (20), wherein the insulating film (20) comprises a substrate layer (21) and a bonding layer (22) which are stacked, the substrate layer (21) comprising a first sub-substrate layer (211) and second sub-substrate layers (212) which are integrated and arranged in a first direction (Y direction) of the battery cell assembly (100), the bonding layer (22) being arranged on the surface of the first sub-substrate layer (211), and the first sub-substrate layer (211) being adhered to the surface of the battery cell body (10) by means of the bonding layer (22).

Description

Battery cells, batteries, and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420024881.X and application date January 3, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to, but is not limited to, the field of battery technology, and in particular to a battery cell assembly, a battery, and a vehicle. Background Art

[0004] In the related art, before the bare cell is placed in the shell, a layer of film needs to be wrapped around the outside of the bare cell. By wrapping the bare cell with a layer of film, direct contact between the bare cell and the shell can be avoided, thereby achieving the purpose of protecting the cell and insulating it.

[0005] However, after the existing membrane is wrapped around the outside of the bare cell, the two joints of the membrane are fixed by tape (this can be understood as one side of the membrane is stationary, and the other side is fixed to one side of the membrane after wrapping around the bare cell once) so that the membrane is wrapped around the outside of the bare cell. This method makes it difficult to make the membrane fit the bare cell well, and it will cause some part of the membrane (such as the tape fitting part) to warp up. In this way, when the bare cell is installed in the shell, the warped part is easily scratched by the mouth of the shell. After the scratch, the bare cell and the shell may come into contact at the wound, resulting in a short circuit risk and causing serious safety accidents. In addition, the bare cell will expand during use. Since the tape itself has a certain thickness, the force at the tape will be inconsistent with the force at other places when the bare cell expands, thereby affecting the working performance of the bare cell.

[0006] Application Contents

[0007] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0008] To this end, one purpose of the present application is to provide a battery cell assembly that is highly safe to use and is beneficial to improving the working performance of the battery cell body.

[0009] The present application further proposes a battery.

[0010] The present application further proposes a vehicle.

[0011] According to the battery cell assembly of the present application, it includes: a battery cell body; an insulating film, the insulating film includes a stacked substrate layer and an adhesive layer, the substrate layer includes a first sub-substrate layer and a second sub-substrate layer that are integrated and arranged along the first direction of the battery cell assembly, the adhesive layer is provided on the surface of the first sub-substrate layer, and the first sub-substrate layer is adhered to the battery cell body through the adhesive layer.

[0012] According to the battery cell assembly of the present application, by arranging an adhesive layer on the surface of the first sub-substrate layer, the first sub-substrate layer can be well adhered to the surface of the battery cell body, which can reduce the probability of a part of the first sub-substrate layer being lifted up, thereby reducing the probability of the first sub-substrate layer being scratched by the shell, which is beneficial to reducing the probability of safety accidents caused by contact between the battery cell body and the shell, can improve the safety of the battery cell assembly, and can make the force consistency of various parts of the battery cell body high when the battery cell body expands, which is beneficial to improving the working performance of the battery cell body. Moreover, by arranging a second sub-substrate layer without glue, the second sub-substrate layer can be connected to the battery cover (first cover and / or second cover), which can improve the installation firmness of the battery cell body.

[0013] In some examples of the present application, the battery cell body includes opposite top and bottom surfaces, and side surfaces perpendicular to the top and bottom surfaces, and the first sub-base material layer is adhered to the side surfaces through the adhesive layer.

[0014] In some examples of the present application, the adhesive layer covers the entire surface of the first sub-base material layer facing the battery cell body.

[0015] In some examples of the present application, along the first direction, both sides of the first sub-substrate layer are surrounded by the second sub-substrate layer.

[0016] In some examples of the present application, the adhesive layer is constructed as a heat-sensitive adhesive layer, a pressure-sensitive adhesive layer, or a photosensitive adhesive layer.

[0017] In some examples of the present application, the thickness of the substrate layer is A, and the thickness of the adhesive layer is B, satisfying the relationship: 95 μm ≤ A + B ≤ 105 μm.

[0018] In some examples of the present application, the relationship: 1≤A / B≤4 is satisfied.

[0019] In some examples of the present application, along the first direction, the size of the first sub-substrate layer is C, and the size of the battery cell body is D, satisfying the relationship: 1 mm ≤ CD ≤ 2 mm.

[0020] According to the battery of the present application, it includes a shell and a cell assembly, the cell assembly is the above-mentioned cell assembly, and along the first direction, both sides of the first sub-substrate layer are the second sub-substrate layers, the shell defines an accommodating space and the first end and the second end opposite to the shell are open, and the cell assembly is arranged in the accommodating space; a first cover body and a second cover body, the first cover body and the second cover body are respectively arranged at the first end and the second end, and the first cover body and the second cover body are respectively connected to the two second sub-substrate layers.

[0021] The vehicle according to the present application includes the above-mentioned battery.

[0022] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic side view of an insulating film according to an embodiment of the present application;

[0024] FIG2 is a schematic front view of an insulating film according to an embodiment of the present application;

[0025] FIG3 is a schematic diagram of a battery cell body according to an embodiment of the present application;

[0026] FIG4 is a schematic diagram of a housing, a first cover, and a second cover according to an embodiment of the present application;

[0027] FIG5 is a schematic diagram of the assembly of the battery cell assembly, the first cover and the second cover according to an embodiment of the present application;

[0028] FIG6 is another schematic diagram of the assembly of the battery cell assembly, the first cover, and the second cover according to an embodiment of the present application.

[0029] Reference numerals:

[0030] Battery cell assembly 100;

[0031] Battery cell body 10; top surface 11; side surface 12;

[0032] Insulating film 20; base material layer 21; first sub-base material layer 211; second sub-base material layer 212; adhesive layer 22;

[0033] Housing 30 ; first end 301 ; second end 302 ; first cover 31 ; second cover 32 . DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0035] The battery cell assembly 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 6 .

[0036] As shown in FIG. 1 to FIG. 6 , the battery cell assembly 100 according to an embodiment of the present application includes: a battery cell body 10 and an insulating film 20 .

[0037] Among them, as some embodiments of the present application, referring to FIG3 , the battery cell body 10 can be constructed as the battery cell body 10 of a square lithium-ion blade battery (the battery cell body 10 can be understood as a bare battery cell).

[0038] As shown in FIG1 , the insulating film 20 includes a stacked substrate layer 21 and an adhesive layer 22. That is, the substrate layer 21 and the adhesive layer 22 are stacked along the thickness direction of the insulating film 20 (i.e., the X direction shown in FIG1 ). As shown in FIG2 , the substrate layer 21 includes an integrally arranged first sub-substrate layer 211 and a second sub-substrate layer 212. The first sub-substrate layer 211 and the second sub-substrate layer 212 are arranged along a first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG2 ). In some embodiments of the present application, an end of the first sub-substrate layer 211 close to the second sub-substrate layer 212 is connected to an end of the second sub-substrate layer 212 close to the first sub-substrate layer 211.

[0039] In some embodiments of the present application, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG. 2 ), a second sub-substrate layer 212 is provided on at least one side of the first sub-substrate layer 211. In some embodiments of the present application, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG. 2 ), both sides of the first sub-substrate layer 211 are provided with the second sub-substrate layer 212. The first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG. 2 ) is perpendicular to the thickness direction of the insulating film 20 (i.e., the X direction shown in FIG. 1 ).

[0040] The adhesive layer 22 is arranged on the surface of the first sub-substrate layer 211, and the first sub-substrate layer 211 is adhered to the battery cell body 10 through the adhesive layer 22, wherein, along the thickness direction of the adhesive layer 22 (i.e., the X direction shown in Figure 1), both sides of the adhesive layer 22 are sticky, one side of the adhesive layer 22 can be bonded to the surface of the first sub-substrate layer 211, and the other side of the adhesive layer 22 can be bonded to the surface of the battery cell body 10, so that the first sub-substrate layer 211 is adhered to the battery cell body 10.

[0041] As some embodiments of the present application, the material of the substrate layer 21 can be but is not limited to PP (polypropylene) material, polyester material, etc. It should be noted that the substrate layer 21 has insulating properties. By adhering the first sub-substrate layer 211 to the surface of the battery cell body 10, after the battery cell assembly 100 is installed in the shell 30, the battery cell body 10 can be prevented from contacting the shell 30, and the probability of short circuit caused by contact between the battery cell body 10 and the shell 30 can be reduced.

[0042] In the prior art, after the membrane is wrapped around the outside of the bare cell, the two joints of the membrane are fixed by tape (this can be understood as one side of the membrane is stationary, and the other side is fixed to one side of the membrane by tape after wrapping around the bare cell once) so that the membrane is wrapped around the outside of the bare cell. This method makes it difficult to make the membrane fit the bare cell well, and it will cause some part of the membrane (such as the tape fitting part) to warp up. In this way, when the bare cell is placed in the shell, the warped part is easily scratched by the mouth of the shell. After the scratch, the bare cell and the shell may come into contact at the wound, resulting in a risk of short circuit, thereby leading to serious safety accidents. In addition, the bare cell will expand during use. Since the tape itself has a certain thickness, the force at the tape will be inconsistent with the force at other places when the bare cell expands, thereby affecting the working performance of the bare cell.

[0043] In the present application, an adhesive layer 22 is provided on the surface of the first sub-substrate layer 211. When the first sub-substrate layer 211 is pasted to the battery cell body 10, the first sub-substrate layer 211 can be well adhered to the surface of the battery cell body 10, and the probability of a part of the first sub-substrate layer 211 being lifted up can be reduced, thereby reducing the probability of the lifted first sub-substrate layer 211 being scratched by the shell 30 when the battery cell assembly 100 is installed in the shell 30. In addition, the thickness of the first sub-substrate layer 211 adhered to various parts of the surface of the battery cell body 10 can be made highly consistent, thereby making the thickness of the battery cell assembly 100 highly consistent, and making the force at various parts of the battery cell body 10 highly consistent when the battery cell body 10 expands, which is beneficial to improving the performance of the battery cell body 10.

[0044] As some embodiments of the present application, the battery may include a cell assembly 100, a shell 30, a first cover 31 and a second cover 32 (as shown in Figure 4). The cell assembly 100 can be arranged in the shell 30, and the first end 301 and the second end 302 of the shell 30 are open. The first cover 31 and the second cover 32 can be respectively arranged at the first end 301 and the second end 302 of the shell 30. By arranging the first sub-substrate layer 211 and the second sub-substrate layer 212 along the first direction of the cell assembly 100 (i.e., the Y direction shown in Figure 2), the second sub-substrate layer 212 can be connected to the adjacent first cover 31 or the second cover 32.

[0045] For example, of the two second sub-base material layers 212, one second sub-base material layer 212 is close to the first cover 31, and the other second sub-base material layer 212 is close to the second cover 32. The second sub-base material layer 212 close to the first cover 31 can be heat-melted to the lower plastic of the first cover 31, and the second sub-base material layer 212 close to the second cover 32 can be heat-melted to the spacer of the second cover 32. By connecting the second sub-base material layer 212 to the first cover 31 or the second cover 32 of the battery, and adhering the adhesive layer 22 to the surface of the battery cell body 10, the battery cell body 10 can be firmly fixed in the shell 30, reducing displacement of the battery cell body 10 and the probability of damage from contact between the battery cell body 10 and the shell 30, which is conducive to improving the safety of the battery.

[0046] In some embodiments of the present application, the first cover 31 may be a negative electrode cover, and the second cover 32 may be a positive electrode cover.

[0047] In some embodiments of the present application, the adhesive layer 22 is an insulating adhesive layer 22 .

[0048] Therefore, by setting an adhesive layer 22 on the surface of the first sub-base layer 211, the first sub-base layer 211 can be well adhered to the surface of the battery cell body 10, which can reduce the probability of a part of the first sub-base layer 211 being lifted up, thereby reducing the probability of the first sub-base layer 211 being scratched by the shell 30, which is beneficial to reducing the probability of safety accidents caused by the contact between the battery cell body 10 and the shell 30, and can improve the safety of the battery cell assembly 100. Moreover, it can make the force consistency at various locations when the battery cell body 10 expands high, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by setting a glue-free second sub-base layer 212, the second sub-base layer 212 can be connected to the battery cover (the first cover 31 and / or the second cover 32), which can improve the installation firmness of the battery cell body 10.

[0049] In addition, the battery cell assembly 100 of the present application does not require additional tape, so there is no need to set up a corresponding mechanism in the production equipment, which can reduce related equipment costs.

[0050] In some embodiments of the present application, as shown in FIG3 , the cell body 10 may include opposing top and bottom surfaces, as well as side surfaces 12 perpendicular to both the top and bottom surfaces. The first sub-substrate layer 211 may be adhered to the side surfaces 12 of the cell body 10 via an adhesive layer 22. As some embodiments of the present application, as shown in FIG3 , the cell body 10 may be configured as the cell body 10 of a prismatic lithium-ion blade battery. The cell body 10 of a prismatic lithium-ion blade battery may include opposing top and bottom surfaces, as well as four side surfaces 12 perpendicular to both the top and bottom surfaces. The four side surfaces 12 are sequentially connected, and the first sub-substrate layer 211 may be adhered to the four side surfaces 12 of the cell body 10 of the prismatic lithium-ion blade battery via an adhesive layer 22. This configuration can isolate the cell body 10 from the housing 30 on all sides, preventing contact between the cell body 10 and the housing 30 and reducing the probability of a short circuit caused by contact between the cell body 10 and the housing 30, thereby improving safety in use.

[0051] In some embodiments of the present application, the adhesive layer 22 can cover the entire surface of the first sub-substrate layer 211 facing the battery cell body 10. It can be understood that the first sub-substrate layer 211 can have a first surface and a second surface relative to each other. After the first sub-substrate layer 211 is arranged on the battery cell body 10, the first surface faces the battery cell body 10, and the adhesive layer 22 can cover the first surface. Such an arrangement can make the first sub-substrate layer 211 fit more tightly and smoothly with the battery cell body 10, and can further reduce the probability of a part of the first sub-substrate layer 211 being lifted up, thereby further reducing the probability of the first sub-substrate layer 211 being scratched by the shell 30, thereby further improving the safety of the battery cell assembly 100, and also improving the yield rate.

[0052] In some embodiments of the present application, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in Figure 2), both sides of the second sub-substrate layer 212 may be second sub-substrate layers 212, and one of the second sub-substrate layers 212 is suitable for connecting to the first cover body 31 of the battery, and the other second sub-substrate layer 212 is suitable for connecting to the second cover body 32 of the battery.

[0053] As some embodiments of the present application, the battery may include a cell assembly 100, a shell 30, a first cover 31 and a second cover 32 (as shown in Figure 4), the cell assembly 100 can be arranged in the shell 30, and the first end 301 and the second end 302 of the shell 30 are open. The first cover 31 and the second cover 32 can be respectively arranged at the first end 301 and the second end 302 of the shell 30, and the second sub-substrate layer 212 located on both sides of the first sub-substrate layer 211 can be respectively connected to the first cover 31 and the second cover 32 of the battery. As some embodiments of the present application, among the two second sub-substrate layers 212, one second sub-substrate layer 212 is close to the first cover body 31, and the other second sub-substrate layer 212 is close to the second cover body 32. The second sub-substrate layer 212 close to the first cover body 31 can be hot-melt welded with the lower plastic of the first cover body 31, and the second sub-substrate layer 212 close to the second cover body 32 can be hot-melt welded with the spacer of the second cover body 32. This arrangement can firmly fix the battery cell body 10 in the shell 30, reduce the displacement of the battery cell body 10, and reduce the probability of contact damage between the battery cell body 10 and the shell 30, which is beneficial to improving the safety of battery use, and can also reduce the probability of damage to the tab due to displacement of the battery cell body 10.

[0054] In some embodiments of the present application, the first cover 31 may be a negative electrode cover, and the second cover 32 may be a positive electrode cover.

[0055] In some embodiments of the present application, the adhesive layer 22 may be configured as a heat-sensitive adhesive layer, or the adhesive layer 22 may be configured as a pressure-sensitive adhesive layer, or the adhesive layer 22 may be configured as a photosensitive adhesive layer.

[0056] As some embodiments of the present application, the bonding layer 22 can be constructed as a pressure-sensitive adhesive layer. In this embodiment, when the first sub-substrate layer 211 is bonded to the surface of the battery cell body 10, pressure can be applied to the pressure roller of the production equipment to make the pressure-sensitive adhesive layer contact with the battery cell body 10 to generate adhesion, so that the first sub-substrate layer 211 can be tightly and smoothly bonded to the surface of the battery cell body 10.

[0057] As some embodiments of the present application, the bonding layer 22 can be constructed as a thermosensitive adhesive layer. In this embodiment, a heating device can be provided in the pressure roller of the production equipment. When the first sub-substrate layer 211 is bonded to the surface of the battery cell body 10, the thermosensitive adhesive layer melts due to heat and becomes sticky, so that the first sub-substrate layer 211 can be tightly and smoothly bonded to the surface of the battery cell body 10.

[0058] As some embodiments of the present application, the bonding layer 22 can be constructed as a photosensitive adhesive layer (UV adhesive layer). In this embodiment, an ultraviolet light (UV light) generating device can be configured in the production equipment. When the first sub-substrate layer 211 is bonded to the surface of the battery cell body 10, the ultraviolet light generating device can irradiate the rolled insulating film 20 to solidify the photosensitive adhesive layer, so that the first sub-substrate layer 211 can be tightly and smoothly bonded to the surface of the battery cell body 10.

[0059] Such an arrangement can conveniently and reliably adhere the first sub-base material layer 211 to the surface of the battery cell body 10 , which is beneficial to reducing the production difficulty of the battery cell assembly 100 and improving the production efficiency of the battery cell assembly 100 .

[0060] In some embodiments of the present application, as shown in FIG. 1 , along the thickness direction of the insulating film 20 (i.e., the X direction shown in FIG. 1 ), the thickness of the substrate layer 21 may be A, and the thickness of the adhesive layer 22 may be B. A and B may satisfy the relationship: 95 μm ≤ A + B ≤ 105 μm. That is, the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 may be any value between 95 μm and 105 μm. For example, the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 may be, but is not limited to, 95 μm, 100 μm, 105 μm, etc. By setting the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 to any value between 95 μm and 105 μm, the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 can be made reasonable, and the thickness of the insulating film 20 can be made reasonable, thereby reliably reducing the probability of a short circuit caused by contact between the battery cell body 10 and the housing 30, while not excessively occupying space within the housing 30, which is conducive to ensuring the capacitance of the battery cell body 10.

[0061] In some embodiments of the present application, the thickness of the first sub-substrate layer 211 is the same as the thickness of the second sub-substrate layer 212 .

[0062] In some embodiments of the present application, as shown in Figure 1, the thickness of the substrate layer 21 can be A, and the thickness of the adhesive layer 22 can be B. A and B can satisfy the relationship: 1≤A / B≤4, that is, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 can be any value between 1 and 4. For example, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 can be but not limited to 1, 2, 3, 4, etc.

[0063] Taking the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 as 100 μm as an example, when the thickness A of the substrate layer 21 is 80 μm, the thickness B of the adhesive layer 22 can be set to 20 μm. At this time, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 is 4. When the thickness A of the substrate layer 21 is 70 μm, the thickness B of the adhesive layer 22 can be set to 30 μm. At this time, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 is 2.33. When the thickness A of the substrate layer 21 is 60 μm, the thickness B of the adhesive layer 22 can be set to 40 μm. At this time, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 is 1.5. When the thickness A of the substrate layer 21 is 50 μm, the thickness B of the adhesive layer 22 can be set to 50 μm. At this time, the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 is 1.

[0064] By setting the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 to any value between 1 and 4, the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 can be made reasonable, so that the substrate layer 21 can have sufficient strength and reduce the probability of damage to the substrate layer 21, and the adhesive layer 22 can have sufficient viscosity to ensure that the insulating film 20 is firmly bonded to the battery cell body 10.

[0065] In some embodiments of the present application, referring to Figures 2 and 3, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in Figure 2), the size (length) of the first sub-substrate layer 211 can be C, and the size (length) of the battery cell body 10 can be D, and C and D satisfy the relationship: 1mm≤CD≤2mm, that is, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in Figure 2), the difference between the size (length) of the first sub-substrate layer 211 and the size (length) of the battery cell body 10 can be any value between 1mm and 2mm. For example, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in Figure 2), the difference between the size (length) of the first sub-substrate layer 211 and the size (length) of the battery cell body 10 can be but not limited to 1mm, 2mm, etc.

[0066] By setting the difference between the size of the first sub-substrate layer 211 and the size of the battery cell body 10 to any value between 1 mm and 2 mm, the difference between the size of the first sub-substrate layer 211 and the size of the battery cell body 10 can be reasonable, and the first sub-substrate layer 211 can completely cover the battery cell body 10, thereby reliably reducing the probability of short circuit caused by contact between the battery cell body 10 and the shell 30.

[0067] According to an embodiment of the present application, the battery includes a cell assembly 100, a shell 30, a first cover 31 and a second cover 32 (as shown in FIG4 ), wherein the cell assembly 100 may be the above-mentioned cell assembly 100, and along the first direction of the cell assembly 100 (i.e., the Y direction shown in FIG2 ), both sides of the second sub-substrate layer 212 may be the second sub-substrate layers 212, the shell 30 defines an accommodating space, and the first end 301 and the second end 302 opposite to the shell 30 are open, the cell assembly 100 may be arranged in the accommodating space, the first cover 31 and the second cover 32 may be respectively arranged at the first end 301 and the second end 302 of the shell 30, and the first cover 31 and the second cover 32 are respectively connected to the two second sub-substrate layers 212.

[0068] For example, among the two second sub-substrate layers 212, one second sub-substrate layer 212 is close to the first cover body 31, and the other second sub-substrate layer 212 is close to the second cover body 32. The second sub-substrate layer 212 close to the first cover body 31 can be hot-melt welded with the lower plastic of the first cover body 31, and the second sub-substrate layer 212 close to the second cover body 32 can be hot-melt welded with the spacer of the second cover body 32. By connecting the second sub-substrate layers 212 located on both sides of the first sub-substrate layer 211 to the first cover body 31 and the second cover body 32 respectively, and making the adhesive layer 22 adhere to the surface of the battery cell body 10, the battery cell body 10 can be firmly fixed in the shell 30, the displacement of the battery cell body 10 can be reduced, and the probability of contact damage between the battery cell body 10 and the shell 30 can be reduced, which is beneficial to improving the safety of battery use, and can also reduce the probability of damage to the tab due to displacement of the battery cell body 10.

[0069] In some embodiments of the present application, the first cover 31 may be a negative electrode cover, and the second cover 32 may be a positive electrode cover.

[0070] As some embodiments of the present application, both the first cover 31 and the second cover 32 may be connected to the housing 30 (eg, welded).

[0071] As some embodiments of the present application, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG2 ), the size (length) of the second sub-base material layer 212 near the first cover 31 is greater than the size (length) of the lower plastic of the first cover 31, so that the second sub-base material layer 212 near the first cover 31 can be conveniently and firmly connected to the lower plastic of the first cover 31. As some embodiments of the present application, along the first direction of the battery cell assembly 100 (i.e., the Y direction shown in FIG2 ), the size (length) of the second sub-base material layer 212 near the second cover 32 is greater than the size (length) of the spacer of the second cover 32, so that the second sub-base material layer 212 near the second cover 32 can be conveniently and firmly connected to the spacer of the second cover 32.

[0072] According to the battery of the embodiment of the present application, by providing an adhesive layer 22 on the surface of the first sub-substrate layer 211, the first sub-substrate layer 211 can be well adhered to the surface of the battery cell body 10, and the probability of a part of the first sub-substrate layer 211 being lifted up can be reduced, thereby reducing the probability of the first sub-substrate layer 211 being scratched by the shell 30, which is beneficial to reducing the probability of safety accidents caused by the contact between the battery cell body 10 and the shell 30, and can improve the safety of the battery cell assembly 100. Moreover, it can make the force consistency of various parts of the battery cell body 10 high when the battery cell body 10 expands, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by providing a glue-free second sub-substrate layer 212, the second sub-substrate layer 212 can be connected to the battery cover (the first cover 31 and / or the second cover 32), which can improve the installation firmness of the battery cell body 10.

[0073] According to the vehicle of the embodiment of the present application, including the above-mentioned battery, by providing an adhesive layer 22 on the surface of the first sub-substrate layer 211, the first sub-substrate layer 211 can be well adhered to the surface of the battery cell body 10, and the probability of a part of the first sub-substrate layer 211 being lifted up can be reduced, thereby reducing the probability of the first sub-substrate layer 211 being scratched by the shell 30, which is beneficial to reducing the probability of safety accidents caused by the contact between the battery cell body 10 and the shell 30, and can improve the safety of the battery cell assembly 100. Moreover, when the battery cell body 10 expands, the force consistency at various locations can be high, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by providing a glue-free second sub-substrate layer 212, the second sub-substrate layer 212 can be connected to the battery cover (the first cover 31 and / or the second cover 32), which can improve the installation firmness of the battery cell body 10.

[0074] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0075] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0076] In the description of this application, “plurality” means two or more.

[0077] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0078] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0079] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0080] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell assembly, comprising: A battery cell body; An insulating film, the insulating film comprising a stacked base layer and an adhesive layer, the base layer comprising a first sub-base layer and a second sub-base layer that are integral and arranged along a first direction of the battery cell assembly, the adhesive layer being disposed on a surface of the first sub-base layer, and the first sub-base layer being adhered to the battery cell body through the adhesive layer.

2. The cell assembly according to claim 1, wherein, The battery cell body comprises a top surface and a bottom surface that are opposite to each other, and a side surface that is perpendicular to both the top surface and the bottom surface, and the first sub-base layer is adhered to the side surface through the adhesive layer.

3. The cell assembly according to claim 1 or 2, wherein, The adhesive layer covers the entire surface of the first sub-base layer facing the battery cell body.

4. The cell assembly according to any one of claims 1-3, wherein, Along the first direction, both sides of the first sub-base layer are the second sub-base layer.

5. The cell assembly according to any one of claims 1-4, wherein, The adhesive layer is configured as a thermosensitive adhesive layer or a pressure-sensitive adhesive layer or a photosensitive adhesive layer.

6. The battery cell assembly according to any one of claims 1-5, wherein, The thickness of the base layer is A, and the thickness of the adhesive layer is B, satisfying the relationship: 95μm ≤ A + B ≤ 105μm.

7. The cell assembly according to claim 6, wherein, Satisfying the relationship: 1 ≤ A / B ≤ 4.

8. The cell assembly according to any one of claims 1-7, wherein, Along the first direction, the dimension of the first sub-base layer is C, and the dimension of the battery cell body is D, satisfying the relationship: 1mm ≤ C - D ≤ 2mm.

9. A battery, comprising: A housing and a battery cell assembly, the battery cell assembly being the battery cell assembly according to any one of claims 1-8, and along the first direction, both sides of the first sub-base layer are the second sub-base layer, the housing defining an accommodation space and both a first end and a second end of the housing being open, and the battery cell assembly being disposed in the accommodation space; A first cover body and a second cover body, the first cover body and the second cover body being respectively disposed at the first end and the second end, and the first cover body and the second cover body being respectively connected to the two second sub-base layers.

10. A vehicle, comprising the battery according to claim 9.

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