Connecting structure, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and provides a connecting structure, a battery pack and electric equipment. The connecting structure comprises a base body and a containing part, the containing part is arranged on the base body, the containing part is filled with an adhesive, and the adhesive is used for being bonded with the battery cell, so that the base body is used for restraining the battery cell from expanding in the first direction. The amount of the adhesive in the connection structure provided by the utility model can be controlled more accurately, and the effective bonding area of the connection structure and the battery cell module can also be controlled more accurately.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a connecting structure, a battery pack and a power consumption device. BACKGROUND

[0002] The battery pack is used for supplying power to a power consumption device such as a vehicle, an aircraft, a ferry, a computer or an energy storage cabinet.

[0003] The battery pack comprises a shell and a cell module, the shell is used for accommodating the cell module, the cell module comprises a plurality of cells arranged in a stack, and the battery pack further comprises a pull belt, a length of the pull belt is substantially equal to a size of the cell module along a stacking direction of the cells. An adhesive is coated on the pull belt, and the pull belt is adhered to the cell module. When the cells in the cell module expand, the pull belt can constrain the cells along the stacking direction, so as to avoid the cells from expanding excessively and increasing the size of the cell module along the stacking direction, thereby making it difficult to assemble the cell module into the shell.

[0004] In the related art, the amount of the adhesive on the pull belt is difficult to control, and the effective adhesive area of the pull belt and the cell module is difficult to control accurately. UTILITY MODEL CONTENT

[0005] The present application provides a connecting structure, a battery pack and a power consumption device, the amount of the adhesive in the connecting structure can be controlled accurately, and the effective adhesive area of the connecting structure and the cell module can also be controlled accurately.

[0006] The present application provides a connecting structure, comprising: a base body and a containing portion, the containing portion is arranged on the base body, and the containing portion is filled with an adhesive, the adhesive is used for adhering to a cell, so that the base body is used for constraining the cell to expand along a first direction.

[0007] In a possible implementation, the connecting structure provided by the present application, the containing portion is a groove arranged on the base body.

[0008] In a possible implementation, the connecting structure provided by the present application, the depth of the groove is greater than or equal to 1 / 5 of the thickness of the base body and less than or equal to 1 / 2 of the thickness of the base body.

[0009] In a possible implementation, the connecting structure provided by the present application, the constraint force of the adhesive after solidification is greater than or equal to the constraint force of the base body.

[0010] In a possible implementation, the connecting structure provided by the present application, the base body is a long strip structure extending along the first direction, the containing portion is a plurality of containing portions, and the plurality of containing portions are arranged at intervals along the first direction, and the adhesive is filled in each containing portion.

[0011] In a possible implementation, the connecting structure provided in the application, the size of the accommodating portion along the first direction is greater than or equal to the interval between adjacent accommodating portions.

[0012] In a possible implementation, the connecting structure provided in the application, the base body comprises an elastic base material and a reinforcing member added in the elastic base material.

[0013] The application also provides a battery pack comprising a battery cell module and the connecting structure, the battery cell module comprising a plurality of battery cells stacked along a first direction, and the connecting structure being arranged on at least one surface of the battery cell module, and the adhesive being bonded to the battery cells to constrain the battery cells to expand along the first direction.

[0014] In a possible implementation, the battery pack provided in the application, at least two opposite surfaces of the battery cell module are provided with the connecting structure.

[0015] In a possible implementation, the battery pack provided in the application, at least two opposite surfaces are each provided with at least two connecting structures, and the at least two connecting structures are arranged at intervals.

[0016] In a possible implementation, the battery pack provided in the application, the battery cell module further comprises a spacer, and the spacer is arranged between at least some adjacent battery cells, and the spacer can be compressed along the first direction to compensate for the expansion of the battery cells along the first direction.

[0017] The application also provides a power consumption device comprising the battery pack.

[0018] The connecting structure provided in the application, by arranging the base body and the accommodating portion, the accommodating portion is arranged on the base body, and the adhesive is filled in the accommodating portion, and the volume of the adhesive that can be filled in the accommodating portion is the volume of the accommodating portion. The volume of the accommodating portion can be set according to the required volume of the adhesive, and thus the amount of adhesive in the connecting structure can be controlled more accurately. The product of the length of the accommodating portion and the width of the accommodating portion is the effective bonding area, and thus the effective bonding area can be controlled more accurately. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 The structural schematic diagram of the battery pack provided in the embodiments of the application;

[0021] Figure 2This is an exploded view of the battery pack provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the cell module and connection structure in the battery pack provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the connection structure provided in the embodiments of this application;

[0024] Figure 5 for Figure 4 Another structural diagram;

[0025] Figure 6 For along Figure 5 A cross-sectional view of the AA plane;

[0026] Figure 7 for Figure 6 Schematic diagram of the matrix structure;

[0027] Figure 8 For along Figure 5 Another sectional view of the AA plane;

[0028] Figure 9 This is a schematic diagram of the structure of the battery cell and spacer in the battery pack provided in the embodiments of this application;

[0029] Figure 10 This is a schematic diagram of the assembly process of the battery pack provided in the embodiments of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Battery Pack;

[0032] 100-Connection structure;

[0033] 110-matrix;

[0034] 120 - Reception section;

[0035] 121 - Limiting wall;

[0036] 130 - Adhesive;

[0037] 200 - Battery cell module; 200a - First surface; 200b - Second surface; 200c - Third surface; 200d - Fourth surface; 200e - Fifth surface; 200f - Sixth surface;

[0038] 210-cell;

[0039] 220 - Spacer;

[0040] 300 - Housing;

[0041] 310 - Receiving cavity;

[0042] 20 - tool base plate

[0043] W1 - substrate width; D1 - substrate thickness

[0044] L2 - housing length; W2 - housing width; D2 - housing thickness

[0045] L1 - spacing

[0046] X - first direction

[0047] Y - second direction

[0048] Z - third direction DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0052] The terms "first", "second", "third" (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0053] Furthermore, the term "comprising" and "including" and their variants are intended to cover both the express steps / caves listed and also other steps / caves which are not expressly listed, but which are inherent to the process, method, system, product or maintenance tool.

[0054] A battery pack is used to supply power to an electrical device such as a vehicle, an aircraft, a ferry, a computer or an energy storage cabinet.

[0055] The battery pack comprises a shell and a cell module. The shell is used to accommodate the cell module. The cell module comprises a plurality of cells stacked in series or in parallel. The battery pack further comprises a pull belt. The pull belt can be made of a material with elasticity. The length of the pull belt is substantially equal to the size of the cell module along the stacking direction of the cells.

[0056] The pull belt is coated with an adhesive. The pull belt is adhered to the cell module. The pull belt can be adhered to a plurality of cells at the same time. When the cells in the cell module expand, the pull belt can constrain the cells along the stacking direction due to the tension of the pull belt and the mutual constraint between adjacent cells. This avoids the cells from expanding excessively and increasing the size of the cell module along the stacking direction. As a result, the cell module is difficult to be assembled into the shell.

[0057] In the related art, when the pull belt and the cells are assembled, the adhesive can be coated on the pull belt. However, the amount of the adhesive on the pull belt is difficult to control. For example, when the amount of the adhesive coated is large, the adhesive on the pull belt will overflow to other positions of the cell module when the pull belt is adhered to the cell module. The overflowed adhesive needs to be removed. In addition, the overflow of the adhesive makes the sum of the thickness of the pull belt and the adhesive different at different positions of the pull belt. After the adhesive is solidified, the constraint forces at different positions of the pull belt are different. The constraint forces on the cells in different areas are different. As a result, the expansion amounts of the cells are different. The different expansion amounts of the cells cause the service life of each cell to be different. This results in the service life of the entire cell module being shortened. The constraint force refers to the tension of the pull belt on the cells to prevent the cells from expanding excessively when the cells expand.

[0058] In addition, too little adhesive or overflow of the adhesive makes some areas of the pull belt have no adhesive. The actual adhesive area is difficult to control. This results in the adhesive force between the pull belt and the cells being insufficient. The expansion amount of the cells cannot be effectively constrained.

[0059] Therefore, embodiments of the present application provide a connecting structure, a battery pack and an electrical device. In the connecting structure, the amount of the adhesive can be controlled more accurately. In addition, the effective adhesive area between the connecting structure and the cell module can also be controlled more accurately.

[0060] Figure 1A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1. Figure 2 An explosion schematic diagram of the battery pack provided by the embodiment of the present application is shown in FIG. 2. Figure 2 The upper cover of the shell is not shown in FIG. 1.

[0061] Referring to FIG. 1, the battery pack 10 includes a battery cell module 200 and a shell 300, the shell 300 has a receiving cavity 310 therein, and the battery cell module 200 can be arranged in the receiving cavity 310. Figure 1 Figure 2 The shell 300 has four receiving cavities 310 therein, and the battery pack 10 includes four battery cell modules 200, one battery cell module 200 being arranged in each receiving cavity 310. Figure 2

[0062] Figure 3 A structural schematic diagram of a battery cell module and a connecting structure in the battery pack provided by an embodiment of the present application is shown in FIG. 3.

[0063] Referring to FIG. 3, the battery cell module 200 includes a plurality of battery cells 210 arranged in stacks, the battery cell module 200 can have a cuboid structure, and the battery cell module 200 has a first direction X, a second direction Y and a third direction Z. Figure 2 Figure 3 The connecting structure 100 has an adhesive on one side, and the connecting structure 100 can be adhered to the surface of the battery cell module 200, so that the connecting structure 100 can constrain the size of the battery cell module 200 along the first direction X, and facilitate the assembly of the battery cell module 200 to the shell 300.

[0064] The specific structure of the connecting structure 100 will be described below.

[0065]

[0066] Figure 4 A structural schematic diagram of the connecting structure provided by an embodiment of the present application is shown in FIG. 4. Figure 5 A structural schematic diagram of the connecting structure from another angle is shown in FIG. 5. Figure 4 A sectional view along the A-A plane in FIG. 4 is shown in FIG. 6. Figure 6 A structural schematic diagram of the base body in FIG. 4 is shown in FIG. 7. Figure 5 Figure 7 Referring to FIG. 3, the connecting structure 100 provided by the embodiment of the present application includes a base body 110 and a receiving portion 120, the receiving portion 120 is arranged on the base body 110, and the receiving portion 120 is filled with an adhesive 130, the adhesive 130 is used to adhere to the battery cell 210, so that the base body 110 is used to constrain the expansion of the battery cell 210 along the first direction X. Figure 6

[0067] Figure 4 to Figure 7

[0068] ​​​​​​​​The base body 110 can be in a strip shape, and the dimension of the base body 110 along the second direction Y is a base body width W1, and the dimension of the base body 110 along the third direction Z is a base body thickness D1. When the connecting structure 100 is bonded with the battery cell module 200, the length direction of the base body 110 is consistent with the first direction X, so that the connecting structure 100 can connect a plurality of battery cells 210 stacked along the first direction X.

[0069] The base body 110 has a receiving portion 120, and the dimension of the receiving portion 120 along the first direction X is a receiving portion length L2, the dimension of the receiving portion 120 along the second direction Y is a receiving portion width W2, and the dimension of the receiving portion 120 along the third direction Z is a receiving portion thickness D2. The product of the receiving portion length L2, the receiving portion width W2 and the receiving portion thickness D2 is the volume of the receiving portion 120, and the volume of the adhesive 130 that can be filled in the receiving portion 120 is the volume of the receiving portion 120. Therefore, the receiving portion length L2, the receiving portion width W2 and the receiving portion thickness D2 can be set according to the required volume of the adhesive 130, and the amount of the adhesive 130 in the connecting structure 100 can be controlled more accurately.

[0070] The side wall of the receiving portion 120 can form a limiting wall 121. When the connecting structure 100 is bonded with the surface of the battery cell module 200, the limiting wall 121 of the receiving portion 120 can also limit the flow of the adhesive 130. Therefore, the adhesive 130 can be prevented from overflowing to other positions of the battery cell module 200.

[0071] The area of the base body 110 where the receiving portion 120 is arranged is a bonding area, and the other areas of the base body 110 are non-bonding areas. In the bonding area, the sum of the thicknesses of the base body 110 and the adhesive 130 is a constant value, and the constraint forces of the bonding area of the connecting structure 100 after the adhesive 130 is cured are basically the same, and the constraint forces of the battery cells 210 in the bonding area are basically the same, so that the expansion amounts of the battery cells 210 are basically the same.

[0072] In addition, the product of the receiving portion length L2 and the receiving portion width W2 is the effective bonding area, so that the effective bonding area can be controlled more accurately, and the bonding force between the connecting structure 100 and the battery cells 210 is larger, and the expansion amount of the battery cells 210 can be effectively constrained.

[0073] The connecting structure 100 provided by the embodiment of the present application is provided with the base body 110 and the accommodating portion 120, the accommodating portion 120 is arranged on the base body 110, the adhesive 130 is filled in the accommodating portion 120, and the volume of the adhesive 130 filled in the accommodating portion 120 is the volume of the accommodating portion 120. The volume of the accommodating portion 120 can be set according to the volume of the adhesive 130 required, so that the amount of the adhesive 130 in the connecting structure 100 can be controlled more accurately. The product of the length of the accommodating portion 120 and the width of the accommodating portion 120 is the effective bonding area, so that the effective bonding area can be controlled more accurately.

[0074] Please continue to refer to Figure 6 and Figure 7 As shown in FIG. 1, in a possible implementation, the accommodating portion 120 is a groove arranged on the base body 110.

[0075] Specifically, the groove is arranged on the base body 110 to form the accommodating portion 120, so that the thickness of the connecting structure 100 is consistent in each region of the connecting structure 100, and the side of the connecting structure 100 deviating from the battery module 200 is prevented from being uneven.

[0076] Figure 8 For another cross-sectional view along Figure 5 A-A of FIG. 1.

[0077] Please refer to Figure 8 As shown in FIG. 2, in another possible implementation, the accommodating portion 120 is a protrusion arranged on the surface of the base body 110.

[0078] In a possible implementation, the depth of the groove is greater than or equal to 1 / 5 of the thickness of the base body 110 and less than or equal to 1 / 2 of the thickness of the base body 110.

[0079] When the accommodating portion 120 is a groove arranged on the base body 110, the depth of the groove is the thickness D2 of the accommodating portion. When the thickness D2 of the accommodating portion is too large, the thickness of the base body 110 at the position of the accommodating portion 120 is small, so that the strength of the base body 110 is small. When the thickness D2 of the accommodating portion is too small, the volume of the adhesive 130 accommodated in the accommodating portion 120 is small, and the bonding strength of the connecting structure 100 and the battery module 200 cannot be guaranteed.

[0080] In the embodiment of the present application, the thickness D2 of the accommodating portion and the thickness D1 of the base body satisfy the following relationship:

[0081] 1 / 5D1≤D2≤1 / 2D1

[0082] For example, the thickness D1 of the base body is usually 0.5mm-1.5mm, and the depth of the groove can be 0.2mm-0.7mm.

[0083] In one possible implementation, the constraint force of the cured adhesive 130 is greater than or equal to the constraint force of the base body 110.

[0084] In the bonding area, the constraint force of the connection structure 100 is equal to the sum of the constraint force of the cured adhesive 130 and the constraint force of the base body 110.

[0085] Specifically, in the bonding area, the constraint force F1 of the cured adhesive 130 can be expressed as follows:

[0086] F1=W2×D2×σ

[0087] b1

[0088] wherein σ b1 is the tensile strength of the cured adhesive 130, and W2×D2 is the cross-sectional area of the adhesive 130 in the bonding area.

[0089] The constraint force F2 of the base body 110 can be expressed as follows:

[0090] F1=[D1×(W1-W2)+W2×(D1-D2)]×σ b2

[0091] wherein σ b2 is the tensile strength of the base body 110, and [D1×(W1-W2)+W2×(D1-D2)] is the cross-sectional area of the base body 110 in the bonding area.

[0092] The constraint force F0 of the bonding area is equal to F1+F2. As can be seen, by selecting a suitable adhesive 130 and designing the depth of the accommodating portion 120, the constraint force F1 of the cured adhesive 130 is greater than or equal to the constraint force F2 of the base body 110, so that the arrangement of the adhesive 130 can increase the constraint force of the connection structure 100, so that the connection structure 100 has a better constraint effect. The adhesive 130 can be a structural adhesive or other adhesive. The structural adhesive has a high strength after curing.

[0093] Please continue to refer to Figure 4 and Figure 5 As shown, the accommodating portion 120 is a plurality of accommodating portions 120, and the plurality of accommodating portions 120 are arranged at intervals along the first direction X. Each accommodating portion 120 is filled with the adhesive 130.

[0094] The accommodating portion 120 is a groove formed on the base body 110. A plurality of accommodating portions 120 are arranged along the first direction X. The strength of the base body 110 between adjacent accommodating portions 120 is high when the adhesive 130 is cured, which can provide better support for the adhesive 130 and reduce the possibility of bending the connection structure 100 along the first direction X, facilitating the bonding operation of the connection structure 100 and the battery cell module 200.

[0095] Please continue to see Figure 7 As shown, the size of the accommodation portion 120 along the first direction X is greater than or equal to the interval between adjacent accommodation portions 120.

[0096] The distance between adjacent accommodation portions 120 is interval L1, and the accommodation portion length L2 is greater than the interval L1, so that the area of the bonding area is greater than the area of the non-bonding area, and the bonding area of the connecting structure 100 and the battery cell module 200 is larger, thereby making the connecting structure 100 and the battery cell module 200 more reliably bonded.

[0097] In one possible implementation, the base body 110 includes an elastic base material and a reinforcing member added in the elastic base material.

[0098] The elastic base material can be a base material such as PET (Polyethylene Terephthalate) that has a certain elastic deformation capability. The elastic base material has a certain strength and can produce elastic deformation, thereby elastically deforming with the expansion of the battery cell 210 and constraining the expansion amount of the battery cell 210 through the elastic force.

[0099] The reinforcing member can be glass fiber. The reinforcing member can be added in the elastic base material to further increase the strength of the base body 110, thereby better constraining the expansion amount of the battery cell 210.

[0100] The battery pack 10 provided by the embodiments of the present application includes the battery cell module 200 and the connecting structure 100 provided by the above embodiments. The adhesive 130 in the connecting structure 100 is bonded to the surface of the battery cell module 200, so that when the battery cell 210 in the battery cell module 200 expands, the base body 110 in the connecting structure 100 can limit the expansion amount of the battery cell 210. It should be noted that the adhesive 130 in one accommodation portion 120 can be bonded to the surfaces of multiple battery cells 210 at the same time.

[0101] Please continue to see Figure 3 As shown, at least two opposite surfaces of the battery cell module 200 are provided with the connecting structure 100.

[0102] The battery cell module 200 can have a cuboid structure. The battery cell module 200 includes six surfaces, which are a first surface 200a, a second surface 200b, a third surface 200c, a fourth surface 200d, a fifth surface 200e, and a sixth surface 200f.

[0103] The first surface 200a and the second surface 200b are oppositely arranged along the third direction Z, the third surface 200c and the fourth surface 200d are oppositely arranged along the second direction Y, and the fifth surface 200e and the sixth surface 200f are oppositely arranged along the first direction X.

[0104] The connecting structure 100 can be adhered on the first surface 200a, the second surface 200b, the third surface 200c and the fourth surface 200d, so that the expansion of the battery cell 210 along the first direction X can be more effectively constrained.

[0105] In the embodiment of the present application, the third surface 200c and the fourth surface 200d are provided with the pole of the battery cell 210, and the surface area of the third surface 200c and the fourth surface 200d is small. The surface area of the first surface 200a and the second surface 200b is large, so the connecting structure 100 can be arranged on the first surface 200a and the second surface 200b, and the first surface 200a and the second surface 200b are oppositely arranged along the third direction Z, so that the stress of the battery cell 210 during expansion is more balanced.

[0106] In a possible implementation, at least two opposite surfaces are provided with at least two connecting structures 100, and the at least two connecting structures 100 are arranged at intervals.

[0107] In Figure 3 In the embodiment shown, the first surface 200a and the second surface 200b are provided with two connecting structures 100, and the two connecting structures 100 are arranged at intervals. In this way, the surface of the battery cell module 200 occupied by the connecting structure 100 can be reduced, and the connecting structure 100 can more effectively constrain the expansion of the battery cell 210.

[0108] Figure 9 The structure schematic diagram of the battery cell and the spacer in the battery pack provided by the embodiment of the present application is provided. In the structure schematic diagram, Figure 9 In the structure schematic diagram, the spacer 220 is partially moved out along the third direction Z in order to clearly show the relative position of the spacer 220 and the battery cell 210. In fact, the spacer 220 is completely inserted into the battery cell 210 along the third direction Z.

[0109] Referring to Figure 9 As shown, the battery cell module 200 further includes a spacer 220, and at least part of the adjacent battery cells 210 have the spacer 220, and the spacer 220 can be compressed along the first direction X to compensate for the expansion amount of the battery cell 210 along the first direction X.

[0110] The spacer 220 is made of foam or aerogel. The spacer 220 can be arranged between two adjacent battery cells 210, or arranged every several battery cells 210. When the battery cell 210 expands, the expansion amount of the battery cell 210 towards the inside of the battery cell module 200 is slightly larger due to the constraint of the connecting structure 100. By arranging the spacer 220, the spacer 220 can be compressed when the battery cell 210 expands, thereby avoiding excessive stress on the battery cell 210. In addition, the spacer 220 and the connecting structure 100 jointly act to make the center distance between the battery cells 210 meet the assembly tolerance, so that the pole in the battery cell 210 is more easily installed with the subsequent connecting sheet and support.

[0111] Next, the assembly process of the battery pack 10 is described.

[0112] Figure 10 The assembly process of the battery pack provided in the embodiments of the present application is shown in the following.

[0113] Referring to Figure 10 The connecting structure 100 filled with the adhesive 130 is placed on the tooling bottom plate 20, and then the battery cells 210 are stacked one by one on the tooling bottom plate 20 along the first direction X. It should be noted that the battery cells 210 are not in contact with each other at this time. After the battery cell module 200 is stacked, the first surface 200a of the battery cell module 200 faces the tooling bottom plate 20, and the second surface 200b faces away from the tooling bottom plate 20.

[0114] Pressure is applied to the battery cell module 200 at both ends along the first direction X to reduce or eliminate the spacing between the battery cells 210 along the first direction X, so that the battery cell module 200 is more easily assembled into the shell 300.

[0115] The connecting structure 100 is also placed on the second surface 200b, so that the connecting structure 100 is bonded to the second surface 200b, and the connecting structure 100 on the side of the first surface 200a is also bonded to the first surface 200a.

[0116] After the adhesive 130 is cured, the battery cell module 200 with the connecting structure 100 is removed from the bottom plate 20, and then placed into the receiving cavity 310 of the shell 300.

[0117] The embodiments of the present application also provide a use electric device, which includes the battery pack 10 provided in the above embodiments.

[0118] The electric device can be a vehicle, an aircraft, a ferry, a computer, or an energy storage cabinet, etc. The vehicle can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle. The battery pack 10 is used to supply power to the electric device, and the electric device can include one battery pack 10 or multiple battery packs 10

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connection structure, characterized in that, include: Matrix (110); A receiving portion (120) is disposed on the substrate (110) and filled with an adhesive (130) for bonding with a battery cell (210) so that the substrate (110) is used to constrain the battery cell (210) to expand in a first direction.

2. The connection structure according to claim 1, characterized in that, The receiving portion (120) is a groove formed on the base (110).

3. The connection structure according to claim 2, characterized in that, The depth of the groove is greater than or equal to 1 / 5 of the thickness of the substrate (110) and less than or equal to 1 / 2 of the thickness of the substrate (110).

4. The connection structure according to claim 1, characterized in that, The binding force of the cured adhesive (130) is greater than or equal to the binding force of the substrate (110).

5. The connection structure according to claim 1, characterized in that, The substrate (110) is a long strip structure extending along the first direction, and there are multiple receiving portions (120). The multiple receiving portions (120) are arranged at intervals along the first direction, and each receiving portion (120) is filled with adhesive (130).

6. The connection structure according to claim 5, characterized in that, The dimension of the receiving portion (120) along the first direction is greater than or equal to the spacing between adjacent receiving portions (120).

7. The connection structure according to any one of claims 1 to 6, characterized in that, The substrate (110) includes an elastic substrate and a reinforcing member added to the elastic substrate.

8. A battery pack, characterized in that, The battery module (200) includes a battery cell module (200) and a connection structure (100) as described in any one of claims 1 to 7, the battery cell module (200) including a plurality of battery cells (210) stacked along a first direction, the connection structure (100) being disposed on at least one surface of the battery cell module (200), and the adhesive (130) being bonded to the battery cells (210) such that the substrate (110) constrains the battery cells (210) to expand along the first direction.

9. The battery pack according to claim 8, characterized in that, The battery cell module (200) has a connection structure (100) on at least two opposite surfaces.

10. The battery pack according to claim 9, characterized in that, At least two connection structures (100) are provided on at least two opposite surfaces, and the at least two connection structures (100) are spaced apart.

11. The battery pack according to claim 8, characterized in that, The battery cell module (200) further includes a spacer (220) between at least partially adjacent battery cells (210), the spacer (220) being compressible along the first direction to compensate for the expansion of the battery cells (210) along the first direction.

12. An electrical appliance, characterized in that, Includes the battery pack (10) as described in any one of claims 8 to 11.

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