Battery cell assembly, battery and vehicle

Abstract

The utility model discloses a battery cell assembly, a battery and a vehicle. The battery cell assembly comprises a battery cell main body, the insulating film comprises a base material layer and a bonding layer which are stacked, the base material layer comprises a first sub-base material layer and a second sub-base material layer which are integrated and arranged in the first direction of the battery cell assembly, the bonding layer is arranged on the surface of the first sub-base material layer, and the first sub-base material layer is bonded to the battery cell main body through the bonding layer. Therefore, the bonding layer is arranged on the surface of the first sub-substrate layer, so that the first sub-substrate layer can be well attached to the surface of the battery cell main body, the tilting probability of a certain part of the first sub-substrate layer can be reduced, and the probability that the first sub-substrate layer is scratched by the shell can be reduced; according to the battery cell assembly, the probability of safety accidents caused by contact between the battery cell main body and the shell is reduced, the use safety of the battery cell assembly can be improved, the stress consistency of all parts of the battery cell main body during expansion is high, and the working performance of the battery cell main body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery core assembly, a battery and a vehicle. Background Art

[0002] In the related art, before the bare cell is installed into 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.

[0003] However, after the existing membrane is wrapped around the outside of the bare battery cell, the two joints of the membrane are fixed by tape (this can be understood as one side of the membrane is not moved, and the other side is fixed to one side of the membrane by tape after wrapping around the bare battery cell once), so that the membrane is wrapped around the outside of the bare battery cell. This method makes it difficult for the membrane to fit the bare battery 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 battery cell is installed in the shell, the warped part is easily scratched by the mouth of the shell. After scratching, there is a risk of short circuit between the bare battery cell and the shell at the wound, thereby causing serious safety accidents. In addition, the bare battery 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 battery cell expands, thereby affecting the working performance of the bare battery cell. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery core assembly, which is highly safe to use and is conducive to improving the working performance of the battery core body.

[0005] The utility model further provides a battery.

[0006] The utility model further provides a vehicle.

[0007] According to the utility model, the battery cell assembly 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 a first direction of the battery cell assembly, the adhesive layer is arranged 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.

[0008] According to the battery cell assembly of the utility model, 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, and the probability of a part of the first sub-substrate layer being lifted up can be reduced, 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 the contact between the battery cell body and the shell, and can improve the safety of the battery cell assembly. Moreover, when the battery cell body expands, the force consistency at various locations is high, 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 cover body (first cover body and / or second cover body) of the battery, and the installation firmness of the battery cell body can be improved.

[0009] In some examples of the present invention, the battery cell body includes a top surface and a bottom surface relative to each other, and a side surface perpendicular to the top surface and the bottom surface, and the first sub-base material layer is adhered to the side surface through the adhesive layer.

[0010] In some examples of the present invention, the adhesive layer covers the entire surface of the first sub-base material layer facing the battery cell body.

[0011] In some examples of the present invention, along the first direction, both sides of the first sub-substrate layer are the second sub-substrate layers.

[0012] In some examples of the present invention, the adhesive layer is constructed as a heat-sensitive adhesive layer, a pressure-sensitive adhesive layer, or a photosensitive adhesive layer.

[0013] In some examples of the present invention, 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.

[0014] In some examples of the present invention, the relationship is satisfied: 1≤A / B≤4.

[0015] In some examples of the present invention, 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: 1mm≤CD≤2mm.

[0016] According to the battery of the utility model, it includes a shell and a battery cell assembly, the battery cell assembly is the above-mentioned battery cell assembly, and along the first direction, both sides of the first sub-substrate layer are the second sub-substrate layers, the shell defines a accommodating space, and the first end and the second end opposite to the shell are both open, and the battery 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.

[0017] The vehicle according to the utility model comprises the above-mentioned battery.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a side view schematic diagram of an insulating film according to an embodiment of the utility model;

[0021] Figure 2 is a front view schematic diagram of an insulating film according to an embodiment of the utility model;

[0022] Figure 3 is a schematic diagram of a battery cell body according to an embodiment of the utility model;

[0023] Figure 4 is a schematic diagram of a housing, a first cover body and a second cover body according to an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of assembling the battery core assembly, the first cover body and the second cover body according to an embodiment of the utility model;

[0025] Figure 6 This is another assembly schematic diagram of the battery cell assembly, the first cover body and the second cover body according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] Battery cell assembly 100;

[0028] Battery cell body 10; top surface 11; side surface 12;

[0029] Insulating film 20; base material layer 21; first sub-base material layer 211; second sub-base material layer 212; adhesive layer 22;

[0030] Shell 30 ; first end 301 ; second end 302 ; first cover 31 ; second cover 32 . DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and 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 invention, and cannot be understood as limiting the present invention.

[0032] Reference below Figure 1-Figure 6 A battery cell assembly 100 according to an embodiment of the present invention is described.

[0033] like Figure 1-Figure 6 As shown, the battery cell assembly 100 according to the embodiment of the present invention includes: a battery cell body 10 and an insulating film 20 .

[0034] Among them, as some embodiments of the present application, refer to Figure 3 As shown, the battery cell body 10 can be constructed as a battery cell body 10 of a square lithium-ion blade battery (the battery cell body 10 can be understood as a bare battery cell).

[0035] Reference Figure 1 As shown, the insulating film 20 includes a stacked base layer 21 and an adhesive layer 22, that is, along the thickness direction (i.e. Figure 1 The base material layer 21 and the adhesive layer 22 are stacked. Figure 2 As shown, the substrate layer 21 includes a first sub-substrate layer 211 and a second sub-substrate layer 212 which are integrally arranged, and along a first direction (i.e. Figure 2 In the Y direction shown in the figure, the first sub-substrate layer 211 and the second sub-substrate layer 212 are arranged. As some embodiments of the present application, one end of the first sub-substrate layer 211 close to the second sub-substrate layer 212 is connected to one end of the second sub-substrate layer 212 close to the first sub-substrate layer 211.

[0036] As some embodiments of the present application, along the first direction (i.e. Figure 2 In some embodiments of the present application, along the first direction (ie, the Y direction) of the battery cell assembly 100, a second sub-substrate layer 212 is disposed on at least one side of the first sub-substrate layer 211. Figure 2 The first direction (ie, the Y direction) of the battery cell assembly 100 is the same as the first direction (ie, the Y direction) of the battery cell assembly 100. Figure 2 The Y direction shown in FIG. 1 is the same as the thickness direction of the insulating film 20 (ie, Figure 1 The X direction shown is perpendicular to the

[0037] The adhesive layer 22 is disposed on the surface of the first sub-substrate layer 211, and the first sub-substrate layer 211 is adhered to the battery body 10 through the adhesive layer 22, wherein the thickness direction of the adhesive layer 22 (i.e. Figure 1 The adhesive layer 22 has adhesive properties on both sides, 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.

[0038] 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 a short circuit occurring when the battery cell body 10 contacts the shell 30 can be reduced.

[0039] In the prior art, after the membrane is wrapped around the outside of the bare battery 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 being wrapped around the bare battery cell once), so that the membrane is wrapped around the outside of the bare battery cell. This method makes it difficult to make the membrane fit the bare battery 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 battery cell is installed in the shell, the warped part is easily scratched by the mouth of the shell. After scratching, there is a risk of short circuit between the bare battery cell and the shell at the wound, thereby causing serious safety accidents. In addition, the bare battery 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 battery cell expands, thereby affecting the working performance of the bare battery cell.

[0040] In the present application, by providing an adhesive layer 22 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 attached 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 attached to various parts of the surface of the battery cell body 10 can be made to have high consistency, so that the thickness of the battery cell assembly 100 can be made to have high consistency, and the force at various parts can be made to have high consistency when the battery cell body 10 expands, which is beneficial to improving the performance of the battery cell body 10.

[0041] As some embodiments of the present application, the battery may include a cell assembly 100, a housing 30, a first cover 31 and a second cover 32 (eg, Figure 4 As shown in FIG. 1 , the cell assembly 100 can be disposed in the housing 30, the first end 301 and the second end 302 of the housing 30 are both open, the first cover 31 and the second cover 32 can be disposed at the first end 301 and the second end 302 of the housing 30, respectively, and the first sub-substrate layer 211 and the second sub-substrate layer 212 are disposed along the first direction (i.e., Figure 2 The second sub-substrate layer 212 is arranged in the Y direction as shown, and can be connected to the adjacent first cover body 31 or the second cover body 32.

[0042] 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 layer 212 to the first cover body 31 or the second cover body 32 of the battery, 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 conducive to improving the safety of the battery.

[0043] As some embodiments of the present application, the first cover body 31 may be a negative electrode cover body, and the second cover body 32 may be a positive electrode cover body.

[0044] As some embodiments of the present application, the adhesive layer 22 is an insulating adhesive layer 22 .

[0045] Therefore, by setting the 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 is high, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by setting 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.

[0046] 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 the cost of related equipment.

[0047] In some embodiments of the present invention, Figure 3 As shown, the battery cell body 10 may include a top surface 11 and a bottom surface relative to each other, and a side surface 12 perpendicular to the top surface 11 and the bottom surface. The first sub-substrate layer 211 may be attached to the side surface 12 of the battery cell body 10 through an adhesive layer 22. As some embodiments of the present application, refer to Figure 3As shown, the battery cell body 10 can be constructed as a battery cell body 10 of a square lithium-ion blade battery. The battery cell body 10 of the square lithium-ion blade battery can include a top surface 11 and a bottom surface relative to each other, and four side surfaces 12 perpendicular to the top surface 11 and the bottom surface. The four side surfaces 12 are connected in sequence, and the first sub-substrate layer 211 can be adhered to the four side surfaces 12 of the battery cell body 10 of the square lithium-ion blade battery through an adhesive layer 22. Such a configuration can separate the battery cell body 10 from the shell 30 on all sides, prevent the battery cell body 10 from contacting the shell 30, and avoid the probability of a short circuit caused by the contact between the battery cell body 10 and the shell 30, thereby helping to improve safety in use.

[0048] In some embodiments of the present invention, 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 a configuration 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.

[0049] In some embodiments of the present invention, along the first direction (i.e. Figure 2 The second sub-substrate layer 212 may be provided on both sides of the second sub-substrate layer 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.

[0050] As some embodiments of the present application, the battery may include a cell assembly 100, a housing 30, a first cover 31 and a second cover 32 (eg, Figure 4As shown), the battery cell assembly 100 can be arranged in the shell 30, the first end 301 and the second end 302 opposite to each other 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. Such an 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 pole ear due to displacement of the battery cell body 10.

[0051] As some embodiments of the present application, the first cover body 31 may be a negative electrode cover body, and the second cover body 32 may be a positive electrode cover body.

[0052] In some embodiments of the present invention, 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.

[0053] 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.

[0054] 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 generates viscosity, so that the first sub-substrate layer 211 can be tightly and smoothly bonded to the surface of the battery cell body 10.

[0055] 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 cure 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.

[0056] Such a configuration can conveniently and reliably bond 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 .

[0057] In some embodiments of the present invention, referring to Figure 1 As shown, along the thickness direction of the insulating film 20 (ie Figure 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 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 may be reasonable, and the thickness of the insulating film 20 may be reasonable, so that the probability of a short circuit caused by the contact between the battery cell body 10 and the shell 30 can be reliably reduced, and the space in the shell 30 will not be excessively occupied, which is conducive to ensuring the capacitance of the battery cell body 10.

[0058] As 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 .

[0059] In some embodiments of the present invention, referring to Figure 1 As shown, 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.

[0060] Taking the sum of the thickness of the substrate layer 21 and the thickness of the adhesive layer 22 as 100μm as an example, when the thickness A of the substrate layer 21 is 80μm, the thickness B of the adhesive layer 22 can be set to 20μm, and 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 70μm, the thickness B of the adhesive layer 22 can be set to 30μm, and 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 60μm, the thickness B of the adhesive layer 22 can be set to 40μm, and 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 50μm, the thickness B of the adhesive layer 22 can be set to 50μm, and the ratio of the thickness of the substrate layer 21 to the thickness of the adhesive layer 22 is 1.

[0061] 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 to 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.

[0062] In some embodiments of the present invention, referring to Figure 2 and Figure 3 As shown, along the first direction of the battery cell assembly 100 (i.e. 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. C and D satisfy the relationship: 1mm≤CD≤2mm. That is, along the first direction (i.e., 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 1 mm and 2 mm. For example, along the first direction (i.e., the Y direction) of the battery cell assembly 100 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 may be, but is not limited to, 1 mm, 2 mm, etc.

[0063] 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 be able to 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.

[0064] The battery according to the embodiment of the utility model includes a battery cell assembly 100, a housing 30, a first cover 31 and a second cover 32 (such as Figure 4 As shown), wherein the battery cell assembly 100 may be the above-mentioned battery cell assembly 100, along the first direction of the battery cell assembly 100 (i.e. Figure 2 The second sub-substrate layer 212 may be provided on both sides of the second sub-substrate layer 212, the shell 30 defines an accommodation space, and the first end 301 and the second end 302 opposite to the shell 30 are open, the battery cell assembly 100 may be arranged in the accommodation space, the first cover body 31 and the second cover body 32 may be respectively arranged at the first end 301 and the second end 302 of the shell 30, and the first cover body 31 and the second cover body 32 are respectively connected to the two second sub-substrate layers 212.

[0065] 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 pole ear due to displacement of the battery cell body 10.

[0066] As some embodiments of the present application, the first cover body 31 may be a negative electrode cover body, and the second cover body 32 may be a positive electrode cover body.

[0067] As some embodiments of the present application, both the first cover body 31 and the second cover body 32 may be connected to the housing 30 (eg, welded).

[0068] As some embodiments of the present application, along the first direction (i.e. Figure 2 The size (length) of the second sub-substrate layer 212 close to the first cover 31 is greater than the size (length) of the lower plastic of the first cover 31, so that the second sub-substrate layer 212 close to 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 (i.e., Figure 2The second sub-substrate layer 212 near the second cover body 32 has a size (length) greater than the size (length) of the spacer ring of the second cover body 32, so that the second sub-substrate layer 212 near the second cover body 32 can be conveniently and firmly connected to the spacer ring of the second cover body 32.

[0069] According to the battery of the embodiment of the utility model, by setting the adhesive layer 22 on the surface of the first sub-substrate layer 211, the first sub-substrate layer 211 can be well attached 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 is high, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by setting the second sub-substrate layer 212 without glue, the second sub-substrate layer 212 can be connected to the cover body (the first cover body 31 and / or the second cover body 32) of the battery, and the installation firmness of the battery cell body 10 can be improved.

[0070] According to the vehicle of the embodiment of the utility model, including the above-mentioned battery, by arranging the adhesive layer 22 on the surface of the first sub-substrate layer 211, the first sub-substrate layer 211 can be well attached 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 is high, which is beneficial to improving the working performance of the battery cell body 10. Moreover, by arranging the second sub-substrate layer 212 without glue, the second sub-substrate layer 212 can be connected to the battery cover (the first cover 31 and / or the second cover 32), and the installation firmness of the battery cell body 10 can be improved.

[0071] In the description of the present invention, 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 invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0072] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0073] In the description of the present invention, "plurality" means two or more.

[0074] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0075] In the description of the present invention, a first feature “above”, “over” 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.

[0076] In the description of this specification, the description with reference to the terms "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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention 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 spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell assembly, characterized in that: include: 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 which are integrally arranged along a first direction of the battery cell assembly, the adhesive layer is arranged 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.

2. The battery cell assembly according to claim 1, characterized in that: The battery cell body includes a top surface and a bottom surface opposite to each other, and a side surface perpendicular to the top surface and the bottom surface, and the first sub-base material layer is adhered to the side surface through the adhesive layer.

3. The battery core assembly according to claim 1, characterized in that: The adhesive layer covers the entire surface of the first sub-base material layer facing the battery cell body.

4. The battery core assembly according to claim 1, characterized in that: Along the first direction, both sides of the first sub-substrate layer are surrounded by the second sub-substrate layer.

5. The battery core assembly according to claim 1, characterized in that: The adhesive layer is constructed as a heat-sensitive adhesive layer, a pressure-sensitive adhesive layer, or a photosensitive adhesive layer.

6. The battery core assembly according to claim 1, characterized in that: The thickness of the substrate layer is A, and the thickness of the adhesive layer is B, which satisfy the relationship: 95 μm≤A+B≤105 μm.

7. The battery cell assembly according to claim 6, characterized in that: The relationship is satisfied: 1≤A / B≤4.

8. The battery core assembly according to claim 1, characterized in that: Along the first direction, the size of the first sub-base material layer is C, and the size of the battery cell body is D, which satisfies the relationship: 1mm≤CD≤2mm.

9. A battery, characterized in that: include: A shell and a cell assembly, wherein the cell assembly is the cell assembly according to any one of claims 1 to 8, and along the first direction, both sides of the first sub-substrate layer are the second sub-substrate layer, the shell defines an accommodation space, and the first end and the second end opposite to the shell are both open, and the cell assembly is arranged in the accommodation space; A first cover body and a second cover body, wherein 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 two second sub-base material layers.

10. A vehicle, characterized in that: Comprising a battery according to claim 9.

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