Battery module, electric device, and method for pouring glue

Abstract

The application discloses a battery module, an electric device and a glue pouring method. The battery module comprises a shell, a battery cell assembly and a first structural member. The shell is provided with a receiving cavity, and the battery cell assembly is installed in the receiving cavity. The battery cell assembly comprises a first battery cell and a second battery cell. In a first direction, the first battery cell and the second battery cell are stacked. In a second direction, one end of the first battery cell is provided with a first metal member. In a third direction, the battery cell assembly is provided with a first side portion and a second side portion which are oppositely arranged. In the second direction, the battery cell assembly is provided with a third side portion and a fourth side portion which are oppositely arranged. The first direction is perpendicular to the second direction and the third direction. The first structural member is at least partially arranged between the shell and the first side portion. A first adhesive is arranged between the first structural member and the shell, and a second adhesive is arranged between the first structural member and the first side portion. In the second direction, the first adhesive has a first length, and the second adhesive has a second length.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery module, electrical equipment, and potting method. Background Technology

[0002] With the explosive growth of battery-powered new energy, the requirements for battery modules are also increasing. Currently, battery modules are usually fixed by potting. Specifically, after the battery cell assembly is placed inside the housing, the space between the battery cell assembly and the housing is filled with glue to fix the battery cell assembly inside the housing and achieve the purpose of resisting vibration, drop and impact.

[0003] However, this fixing method has the problem of using too much adhesive and the adhesive being prone to cracking and failure when subjected to impact or stress. Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module with improved impact resistance.

[0005] Some embodiments of this application provide a battery module, which includes a housing, a cell assembly, and a first structural member. The housing has a receiving cavity, and the cell assembly is installed in the receiving cavity. The cell assembly includes a first cell and a second cell, stacked along a first direction. Along a second direction, one end of the first cell extends out with a first metal member. Along a third direction, the cell assembly has a first side and a second side disposed opposite to each other. Along the second direction, the cell assembly also has a third side and a fourth side disposed opposite to each other. The first direction is perpendicular to both the second direction and the third direction. The first structural member is at least partially disposed between the housing and the first side. A first adhesive is provided between the first structural member and the housing, and a second adhesive is provided between the first structural member and the first side. Along the second direction, the first adhesive has a first length, and the second adhesive has a second length.

[0006] The aforementioned first structural component is positioned between the first adhesive and the second adhesive. When either the first or second adhesive cracks under stress, the first structural component acts as a barrier, reducing the propagation of the adhesive crack and thus improving the impact resistance of the battery module. The first adhesive fixes the first structural component to the housing, and the second adhesive fixes the first structural component to the first side of the cell assembly, thereby securing the cell assembly to the housing and improving its stability. This achieves the purpose of resisting vibration, drops, and impacts. The second adhesive can also fill the gap between the first side and the first structural component to act as a heat-conducting medium, transferring the heat generated by the cell assembly to the first structural component, and then to the housing for heat dissipation, thus improving the heat dissipation effect of the battery module.

[0007] In some embodiments, the first length is greater than the second length.

[0008] The first length being greater than the second length ensures that there is both a second adhesive that acts as a heat dissipation medium and a gap that facilitates heat dissipation between the first side and the first structural component, thereby conducting the heat generated by the battery cell assembly between the first side and the first structural component and improving the heat dissipation effect.

[0009] In some embodiments, a first space exists between the first structural member and the housing, a second space exists between the first structural member and the first side portion, and the first structural member is provided with a first hole that connects the first space and the second space.

[0010] The first hole connects the first space and the second space, which allows the first adhesive in the first space to enter the second space. The first adhesive enters the second space and forms a second adhesive, so that the first space contains the first adhesive and the second space contains the second adhesive. This can save the process of first applying adhesive to the first side and improve the assembly efficiency of the battery module.

[0011] In some embodiments, the first adhesive and the second adhesive are connected through a first hole.

[0012] The first adhesive and the second adhesive are connected through the first hole, making the first adhesive and the second adhesive a whole. This can improve the stability between the cell assembly, the first structural component and the shell, and also facilitate the conduction of heat from the second adhesive to the first adhesive, thus improving the heat dissipation effect of the battery module.

[0013] In some embodiments, the number of first holes is at least two.

[0014] The aforementioned multiple first holes facilitate the connection between the first space and the second space, further enabling the adhesive to enter the second space from the first space and increasing the amount of second adhesive within the second space. By increasing the number of first holes rather than directly enlarging them, the structural strength of the first structural component can be improved, reducing the risk of deformation due to stress.

[0015] In some embodiments, at least two first holes are arranged along a first direction.

[0016] The arrangement of the aforementioned multiple first holes along the first direction allows the adhesive entering the second space to extend along the first direction, thereby increasing the length of the second adhesive extending along the first direction and increasing the contact area between the first side and the second adhesive, thus improving the impact resistance and heat dissipation of the battery cell assembly.

[0017] In some embodiments, along a third direction, the projection of the first hole at least partially overlaps with the projection of the first cell.

[0018] In some embodiments, along a third direction, the projection of the first hole at least partially overlaps with the projections of the first cell and the second cell.

[0019] The fact that the projection of the first hole overlaps at least partially with the projection of the first battery cell and / or the second battery cell facilitates direct contact between the adhesive entering the second space and the first battery cell and / or the second battery cell, and further increases the contact area between the second adhesive and the first side, thereby improving the impact resistance and heat dissipation of the battery cell assembly.

[0020] In some embodiments, the first metal member is located on the third side. Along the second direction, the first adhesive has a portion extending from the fourth side toward the third side.

[0021] The first adhesive has a portion extending from the fourth side toward the third side, making the first adhesive closer to the fourth side than the third side. This reduces the risk of the first adhesive coming into contact with the first metal part and other electronic components, thereby reducing the risk of the first adhesive affecting the first metal part and other electronic components.

[0022] In some embodiments, a first distance exists between the first adhesive and the third side portion along the second direction.

[0023] The aforementioned first distance prevents the first adhesive from extending to the third side, further reducing the risk that the first adhesive may affect the first metal part or other electronic components. It also helps to reduce the amount of the first adhesive used, thereby reducing the overall weight of the battery module and increasing the energy density of the battery module.

[0024] In some embodiments, along the second direction, there is a second distance between the first hole and the third side, and a third distance between the first hole and the fourth side, wherein the second distance is greater than the third distance.

[0025] The second distance is greater than the third distance, which makes the first hole closer to the fourth side than the third side. This makes the distance between the second adhesive in the second space and the third side greater than the distance between the second adhesive and the fourth side, thus increasing the distance between the second adhesive and the third side. This helps to reduce the risk of the second adhesive affecting the first metal part or other electronic components.

[0026] In some embodiments, along the second direction, there is a first distance between the first adhesive and the third side portion, the first distance being less than the second distance.

[0027] The first distance being smaller than the second distance allows the first adhesive to extend beyond the first hole along the second direction, facilitating the first adhesive to enter the second space through the first hole. It also allows the first adhesive to enter the second space more fully, increasing the amount of adhesive entering the second space, thereby improving the stability and heat dissipation of the battery cell assembly.

[0028] In some embodiments, the first metal member is located on the third side. Along the second direction, the first adhesive has a portion extending from the third side toward the fourth side.

[0029] The first adhesive has a portion extending from the third side toward the fourth side, making the first adhesive closer to the third side than the fourth side, thereby improving the heat dissipation effect on the third side and thus helping to reduce the temperature of the first metal part used for conduction, thereby improving the reliability of the battery cell assembly.

[0030] In some embodiments, a fourth distance exists between the first adhesive and the fourth side portion.

[0031] The aforementioned fourth distance prevents the first adhesive from extending to the fourth side, thereby reducing the amount of the first adhesive used, which helps to reduce the overall weight of the battery module and increase the energy density of the battery module.

[0032] In some embodiments, along the second direction, there is a second distance between the first hole and the third side, and a third distance between the first hole and the fourth side, wherein the second distance is less than the third distance.

[0033] The second distance is smaller than the third distance, so that the first hole is closer to the third side than the fourth side. This makes the distance between the second adhesive and the third side in the second space smaller than the distance between the second adhesive and the fourth side, thus reducing the distance between the second adhesive and the third side and improving the heat dissipation effect on the third side. This, in turn, is beneficial to the heat dissipation of the first metal part and improves the reliability of the battery cell assembly.

[0034] In some embodiments, along the second direction, there is a fourth distance between the first adhesive and the fourth side portion, the fourth distance being smaller than the third distance.

[0035] The fact that the fourth distance is smaller than the third distance allows the first adhesive to extend beyond the first hole along the second direction, making it easier for the first adhesive to enter the second space through the first hole. It also allows the first adhesive to enter the second space more fully, increasing the amount of adhesive entering the second space, thereby improving the stability and heat dissipation of the battery cell assembly.

[0036] In some embodiments, the battery module further includes a second structural member disposed between the housing and the second side portion, a seventh adhesive is provided between the second structural member and the housing, and an eighth adhesive is provided between the second structural member and the second side portion.

[0037] The simultaneous arrangement of the first and second structural components can further improve the stability between the battery cell assembly and the housing, further improve the heat dissipation effect of the battery cell assembly, and reduce the insulation effect between the battery cell assembly and the housing.

[0038] In some embodiments, along a first direction, the cell assembly includes a first surface and a second surface disposed opposite to each other, and the battery module further includes a third structural member and a fourth structural member. The third structural member is disposed between the first surface and the housing, and a third adhesive is provided between the third structural member and the housing. The fourth structural member is disposed between the second surface and the housing, and a fourth adhesive is provided between the fourth structural member and the housing.

[0039] The aforementioned third and fourth structural components improve the insulation between the battery cell assembly and the housing. The third adhesive between the third structural component and the housing applies pressure to the battery cell assembly in the first direction, and the fourth adhesive between the fourth structural component and the housing also applies pressure to the battery cell assembly in the first direction, thereby improving the stability of the battery cell assembly relative to the housing. The third and fourth adhesives also act as heat-conducting media, further enhancing the heat dissipation of the battery cell assembly.

[0040] In some embodiments, along the second direction, the third adhesive extends with a third length, which is greater than the second length. In some embodiments, the fourth adhesive extends with a fourth length, which is greater than the second length.

[0041] The aforementioned third length being greater than the second length helps to increase the contact area between the third adhesive and the third structural component, further improving the heat dissipation effect on the battery cell assembly. It also further enhances the pressure exerted by the third adhesive on the battery cell assembly through the third structural component, thereby improving the stability of the battery cell assembly relative to the housing. Similarly, the fourth length being greater than the second length helps to increase the contact area between the fourth adhesive and the fourth structural component, further improving the heat dissipation effect on the battery cell assembly. It also further enhances the pressure exerted by the fourth adhesive on the battery cell assembly through the fourth structural component, thereby improving the stability of the battery cell assembly relative to the housing.

[0042] In some embodiments, the third structural member is attached to the first surface, and the fourth structural member is attached to the second surface.

[0043] The third structural component is attached to the first surface, eliminating the need for adhesive between the third structural component and the first surface, thus reducing the amount of adhesive used and consequently reducing the overall weight of the battery module. Similarly, the fourth structural component is attached to the second surface, eliminating the need for adhesive between the fourth structural component and the fourth surface, further reducing the amount of adhesive used and consequently reducing the overall weight of the battery module. This, in turn, helps to improve the energy density of the battery module.

[0044] In some embodiments, a third space is formed between the battery cell assembly and the receiving cavity. The third space has a first volume, a first adhesive is disposed in the third space, and the first adhesive occupies a second volume, which is half of the first volume.

[0045] The second volume being half the first volume, compared to filling the containment cavity with adhesive, helps reduce the overall amount of adhesive used, thereby reducing the overall weight of the battery module and saving costs. Reducing the amount of adhesive also reduces the curing time of the adhesive, improves process efficiency, and thus reduces process costs.

[0046] In some embodiments, the first metal member is located on the third side, and a fifth distance exists between the third side and the fourth side along the second direction. The first length is greater than half of the fifth distance.

[0047] The aforementioned first length being greater than half of the fifth distance can increase the contact area between the first adhesive and the first structural component while reducing the overall amount of adhesive used, thereby improving the heat dissipation effect on the battery cell assembly and the first structural component.

[0048] In some embodiments, the first length is equal to the second length.

[0049] The fact that the first length is equal to the second length helps to make the stress situation between the first structural component and the battery cell assembly closer to the stress situation between the first structural component and the housing, thereby reducing the risk of deformation of the first structural component due to uneven stress.

[0050] In some embodiments, the first length is less than the second length.

[0051] The fact that the first length is less than the second length can increase the amount of adhesive between the first structural component and the battery cell assembly, that is, increase the contact area between the second adhesive and the first structural component, and further improve the stability of the battery cell assembly relative to the housing.

[0052] In some embodiments, the battery module further includes a second structural member disposed between the housing and the second side portion, a seventh adhesive is provided between the second structural member and the housing, and an eighth adhesive is provided between the second structural member and the second side portion.

[0053] The simultaneous arrangement of the first and second structural components can further improve the stability between the battery cell assembly and the housing, further improve the heat dissipation effect of the battery cell assembly, and reduce the insulation effect between the battery cell assembly and the housing.

[0054] In some embodiments, along a first direction, the cell assembly includes a first surface and a second surface disposed opposite to each other, and the battery module further includes a third structural member and a fourth structural member. The third structural member is disposed between the first surface and the housing, and a third adhesive is provided between the third structural member and the housing. The fourth structural member is disposed between the second surface and the housing, and a fourth adhesive is provided between the fourth structural member and the housing.

[0055] The aforementioned third and fourth structural components improve the insulation between the battery cell assembly and the housing. The third adhesive between the third structural component and the housing applies pressure to the battery cell assembly in the first direction, and the fourth adhesive between the fourth structural component and the housing also applies pressure to the battery cell assembly in the first direction, thereby improving the stability of the battery cell assembly relative to the housing. The third and fourth adhesives also act as heat-conducting media, further enhancing the heat dissipation of the battery cell assembly.

[0056] In some embodiments, a third space is formed between the battery cell assembly and the receiving cavity. The third space has a first volume, a first adhesive is disposed in the third space, and the first adhesive occupies a second volume, which is half of the first volume.

[0057] The second volume, being half the first volume, reduces the overall amount of adhesive used compared to filling the cavity with adhesive. This reduces the overall weight of the battery module and saves costs. Reducing the amount of adhesive also shortens the curing time, improves production efficiency, and ultimately lowers process costs.

[0058] In some embodiments, the first metal member is located on the third side. The first structural member includes a first portion and a second portion, the first portion being located between the first side and the housing, and the second portion being located between the fourth side and the housing.

[0059] The second part described above can insulate the fourth side from the shell. The second part can also prevent the fourth side from directly contacting the shell, thereby providing protection for the fourth side, the junction of the first and fourth sides, and the junction of the second and fourth sides.

[0060] In some embodiments, a fifth adhesive is provided between the fourth side and the housing.

[0061] After the fifth adhesive solidifies, it can form a base for the battery cell assembly, which can stabilize the battery cell assembly and provide cushioning and protection for it.

[0062] In some embodiments, the first battery cell includes a first housing, and a first metal member extends from one end of the first housing along a second direction; the second battery cell includes a second housing and a second metal member, and the second metal member extends from one end of the second housing along a second direction.

[0063] The aforementioned second metal component extends from one end of the second housing, which facilitates the centralized arrangement of the first and second metal components.

[0064] In some embodiments, both the first metal member and the second metal member are located on the third side.

[0065] The first metal part and the second metal part mentioned above are both located on the third side, which can reduce the distance between the first metal part and the second metal part and facilitate the connection between the first metal part and the second metal part.

[0066] In some embodiments, the first metal member is connected to the second metal member, and the battery module further includes a first elastic member disposed between the first metal member and the first housing.

[0067] The aforementioned first elastic element serves to support the first elastic element, and the first elastic element also acts as a buffer between the first metal part and the first housing, thereby reducing the risk of deformation of the first metal part under stress.

[0068] In some embodiments, the battery module further includes a fifth structural member, and the surface of the first elastic member facing away from the first housing is in contact with the fifth structural member.

[0069] The aforementioned fifth structural component can serve to hold and stabilize the first elastic component.

[0070] In some embodiments, the battery module further includes a sixth structural member. Along a third direction, the first elastic member has a first end and a second end disposed opposite to each other. The surface of the first end facing away from the first housing is in contact with the fifth structural member, and the surface of the second end facing away from the first housing is in contact with the sixth structural member.

[0071] The simultaneous installation of the fifth and sixth structural components can further enhance the stabilizing effect on the first elastic component and make the stabilizing effect on the first elastic component more balanced.

[0072] In some embodiments, the battery module further includes a second elastic member, which is disposed around the first elastic member.

[0073] The second elastic element further stabilizes the first elastic element. When there are multiple first elastic elements, the stabilizing effect of the second elastic element on the first elastic element is more obvious.

[0074] In some embodiments, the first battery cell further includes a third metal member, and the second battery cell further includes a fourth metal member. Along a second direction, the third metal member extends from one end of the first housing, and the fourth metal member extends from one end of the second housing. Both the third and fourth metal members are located on a third side. The battery module also includes a circuit board, which is connected to the first elastic member and also to the third and fourth metal members.

[0075] The aforementioned circuit board is equipped with electronic components, enabling it to manage the first and second battery cells.

[0076] In addition, it is necessary to provide an electrical device to improve the heat dissipation of battery cell components.

[0077] One embodiment of this application provides an electrical device, which includes a device body and a battery module as described in any of the above embodiments, wherein the battery module is installed on the device body.

[0078] The heat dissipation effect of the battery module in any of the above embodiments is improved. Therefore, the heat dissipation effect of the electrical equipment using any of the above embodiments is improved, thereby improving the reliability of the electrical equipment.

[0079] In addition, it is necessary to provide a potting method to improve heat dissipation of battery cell components.

[0080] One embodiment of this application provides a potting method suitable for a battery module. The battery module includes a housing, a cell assembly, and a first structural member. The housing has a receiving cavity. The cell assembly includes a first cell and a second cell, stacked along a first direction. Along a second direction, one end of the first cell extends out with a first metal member. Along a third direction, the cell assembly has a first side and a second side disposed opposite to each other. The first direction is perpendicular to both the second direction and the third direction. Along the third direction, the first structural member is at least partially disposed on one side of the first side, and along the third direction, the first structural member has a through hole. The potting method includes a potting step, an insertion step, and a pressing step. The potting step involves pouring adhesive into the receiving cavity. The insertion step involves inserting the cell assembly into the receiving cavity. The pressing step involves controlling the cell assembly to be squeezed into the adhesive, causing the adhesive to flow between the cell assembly and the housing, and allowing the adhesive to enter between the first side and the first structural member through the first hole.

[0081] The above-mentioned potting method has the following beneficial effects:

[0082] The adhesive can enter the second space from the first space through the first hole, so that the first space contains the first adhesive and the second space contains the second adhesive. This can save the step of brushing adhesive on the first side first and improve the assembly efficiency of the battery module.

[0083] The first adhesive and the second adhesive can be connected through the first hole, so that the first adhesive and the second adhesive are connected into a whole. This can improve the stability of the cell assembly and the first structural component, and also facilitate the conduction of heat from the second adhesive to the first adhesive, thereby improving the heat dissipation effect of the battery module.

[0084] By making the first length greater than the second length, there is both a second adhesive that acts as a heat dissipation medium and a gap that facilitates heat dissipation between the first side and the first structural component. This allows the heat generated by the battery cell assembly to be directed between the first side and the first structural component, thereby improving the heat dissipation effect. Attached Figure Description

[0085] Figure 1 This is a schematic diagram of the structure of a battery module provided in one embodiment of this application.

[0086] Figure 2 for Figure 1 An exploded view of the battery module.

[0087] Figure 3 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0088] Figure 4 This is a schematic diagram of the structure of a battery cell assembly provided in an embodiment of this application.

[0089] Figure 5 An exploded schematic diagram of a first battery cell provided in an embodiment of this application.

[0090] Figure 6 This is a schematic diagram of the structure of a first battery cell provided in an embodiment of this application.

[0091] Figure 7 This is a schematic diagram of the structure of a second battery cell provided in an embodiment of this application.

[0092] Figure 8 This is a schematic diagram of the structure of a battery cell assembly provided in an embodiment of this application.

[0093] Figure 9 This is a schematic diagram of the structure of a hidden housing for a battery module provided in an embodiment of this application.

[0094] Figure 10 This is a schematic diagram of a first elastic member, a fifth structural member, and a sixth structural member provided in an embodiment of this application.

[0095] Figure 11 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0096] Figure 12 This is a partial cross-sectional view of a battery module provided in an embodiment of this application.

[0097] Figure 13 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0098] Figure 14 for Figure 13 A magnified view of part A in the middle.

[0099] Figure 15 This is a schematic diagram of the battery cell assembly and the first and second structural components provided in an embodiment of this application.

[0100] Figure 16 A side view of a cell assembly and a first structural member provided in an embodiment of this application.

[0101] Figure 17A side view of a battery cell assembly, a first adhesive, a second adhesive, and a first structural member provided in an embodiment of this application.

[0102] Figure 18 A side view of a battery cell assembly, a first adhesive, a second adhesive, and a first structural member provided in an embodiment of this application.

[0103] Figure 19 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0104] Figure 20 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0105] Figure 21 This is a schematic diagram of the battery cell assembly, the third structural component, and the third adhesive provided in an embodiment of this application.

[0106] Figure 22 This is a schematic diagram of the battery cell assembly, the fourth structural component, and the fourth adhesive provided in an embodiment of this application.

[0107] Figure 23 A side view of a battery cell assembly provided in an embodiment of this application.

[0108] Figure 24 A side view of a battery cell assembly provided in an embodiment of this application.

[0109] Figure 25 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0110] Figure 26 A side view of a battery cell assembly, a first adhesive, and a first structural member provided in an embodiment of this application.

[0111] Figure 27 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0112] Figure 28 This is a cross-sectional view of a battery module provided in an embodiment of this application.

[0113] Figure 29 This is a schematic diagram of an electrical device provided in an embodiment of this application.

[0114] Explanation of main component symbols

[0115] Battery Module 100

[0116] Casing 10

[0117] Containment cavity 1112

[0118] First outer shell 11

[0119] Opening 110

[0120] First Wall 111

[0121] Second Wall 112

[0122] Third Wall 113

[0123] Fourth Wall 114

[0124] Fifth Wall 115

[0125] Second outer shell 12

[0126] Battery cell assembly 20

[0127] First cell 21

[0128] First shell 211

[0129] First edge sealing 2111

[0130] Second edge sealing 2112

[0131] Third border sealing 2113

[0132] Fourth edge sealing 2114

[0133] First metal component 212

[0134] Third metal component 213

[0135] Second battery cell 22

[0136] Second shell 221

[0137] Second metal part 222

[0138] Fourth metal part 223

[0139] Electrode Assembly 2012

[0140] Third battery cell 23

[0141] Fourth cell 24

[0142] First side section 201

[0143] Second side 202

[0144] Third side 203

[0145] Fourth side 204

[0146] Page 1, 205

[0147] Page 206

[0148] First structural component 30

[0149] Hole 31

[0150] Part 1, 301

[0151] Part 2, 302

[0152] Second structural component 40

[0153] Third structural component 50

[0154] Fourth structural component 60

[0155] First elastic element 101

[0156] First end 1011

[0157] Second end 1012

[0158] Second elastic element 102

[0159] Fifth structural component 103

[0160] Sixth structural component 104

[0161] Circuit board 105

[0162] First adhesive 10a

[0163] Second adhesive 20a

[0164] Sixth adhesive 10b

[0165] Third adhesive 30a

[0166] Fourth adhesive 40a

[0167] Fifth Adhesive 50a

[0168] Seventh Adhesive 60a

[0169] Eighth Adhesive 70a

[0170] First length L1

[0171] Second length L2

[0172] Third length L3

[0173] Fourth length L4

[0174] First distance D1

[0175] Second distance D2

[0176] Third distance D3

[0177] Fourth distance D4

[0178] Fifth distance D5

[0179] First Space S1

[0180] Second Space S2

[0181] Third Space S3

[0182] Boundary line T1

[0183] First direction X

[0184] Second direction Y

[0185] Third direction Z

[0186] Equipment body 200

[0187] 1000 electrical appliances Detailed Implementation

[0188] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application.

[0189] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0190] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0191] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments.

[0192] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0193] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0194] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is straight or plane, the component can be considered a "straight line" or "plane".

[0195] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0196] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0197] This application discloses a battery module, which includes a housing, a cell assembly, and a first structural member. The housing has a receiving cavity, and the cell assembly is installed in the receiving cavity. The cell assembly includes a first cell and a second cell, stacked along a first direction. Along a second direction, one end of the first cell extends out with a first metal member. Along a third direction, the cell assembly has a first side and a second side disposed opposite to each other. Along the second direction, the cell assembly also has a third side and a fourth side disposed opposite to each other. The first direction is perpendicular to both the second direction and the third direction. The first structural member is at least partially disposed between the housing and the first side. A first adhesive is provided between the first structural member and the housing, and a second adhesive is provided between the first structural member and the first side. Along the second direction, the first adhesive has a first length, and the second adhesive has a second length.

[0198] The aforementioned first structural component is disposed between the first adhesive and the second adhesive. When either the first adhesive or the second adhesive is subjected to stress and cracks, the first structural component acts as a barrier, reducing the propagation of the adhesive crack and thus improving the impact resistance of the battery module. The first adhesive fixes the first structural component to the housing, and the second adhesive fixes the first structural component to the first side of the cell assembly, thereby fixing the cell assembly to the housing, improving the stability of the cell assembly, and achieving the purpose of resisting vibration, drops, and impacts. The second adhesive can also fill the gap between the first side and the first structural component to act as a heat-conducting medium, conducting the heat generated by the cell assembly to the first structural component, and then to the housing for heat dissipation, improving the heat dissipation effect of the battery module.

[0199] Some embodiments of this application will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0200] Please see Figures 1 to 3 This application provides a battery module 100, which includes a housing 10, a cell assembly 20, and a first structural member 30. The housing 10 has a receiving cavity 1112, the cell assembly 20 is installed in the receiving cavity 1112, the first structural member 30 is disposed between the housing 10 and the cell assembly 20, a first adhesive 10a is provided between the first structural member 30 and the housing 10, and a second adhesive 20a is provided between the first structural member 30 and the cell assembly 20.

[0201] In some embodiments, please refer to Figure 2 and Figure 3The housing 10 includes a first outer shell 11 and a second outer shell 12. The first outer shell 11 includes a first wall 111, a second wall 112, a third wall 113, a fourth wall 114, and a fifth wall 115. The first wall 111, the second wall 112, the third wall 113, the fourth wall 114, and the fifth wall 115 form a cylindrical structure with an opening 110. The first wall 111 and the second wall 112 are arranged opposite each other along a first direction X, and the third wall 113 and the fourth wall 114 are arranged opposite each other along a third direction Z. The second direction Y is perpendicular to both the first direction X and the third direction Z, such that the fifth wall 115 and the opening 110 of the first outer shell 11 are arranged opposite each other along the second direction Y. The fifth wall 115 is connected to the first wall 111, the second wall 112, the third wall 113, and the fourth wall 114.

[0202] In some embodiments, please refer to Figure 2 and Figure 3 The second outer shell 12 has a cover-like structure. The second outer shell 12 is connected to the first outer shell 11 and is used to cover the opening 110 of the first outer shell 11, so that the first outer shell 11 and the second outer shell 12 enclose a receiving cavity 1112. The second outer shell 12 can be connected to the first outer shell 11 by means of snap-fit, adhesive or welding to cover the opening of the first outer shell 11.

[0203] In other embodiments, the housing 10 is formed by combining two or more parts. The multiple parts of the housing 10 are combined by means of bonding, welding or snap-fitting, and the combination of the multiple parts forms a receiving cavity 1112.

[0204] The first outer shell 11 and the second outer shell 12 can be made of non-metallic materials such as plastic, rubber or carbon fiber composite materials, or metallic materials such as copper, iron or aluminum alloys, or a combination of the above materials. The materials of the first outer shell 11 and the second outer shell 12 can be the same or different, and no specific limitation is made here.

[0205] Please see Figure 3 and Figure 4 The battery cell assembly 20 is installed in the receiving cavity 1112. The battery cell assembly 20 includes a first battery cell 21 and a second battery cell 22, which are stacked along a first direction X.

[0206] Please see Figure 5 and Figure 6 The first battery cell 21 includes a first housing 211, an electrode assembly 2012, and a first metal part 212. In some embodiments, the first housing 211 may be composed of multiple parts, which together form a space capable of accommodating the electrode assembly 2012. After the multiple parts of the first housing 211 are combined, a sealing edge for sealing may be formed at the joint edge.

[0207] In some embodiments, please refer to Figure 6 The first housing 211 has a first sealing edge 2111 and a second sealing edge 2112 disposed opposite to each other along the second direction Y, and a third sealing edge 2113 and a fourth sealing edge 2114 disposed opposite to each other along the third direction Z.

[0208] The first housing 211 can be a flexible packaging shell made of aluminum-plastic film, or it can be a rigid packaging shell made of plastic or metal.

[0209] The electrode assembly 2012 includes an electrode (not shown) and a separator (not shown). The electrode and separator can be stacked or stacked and then wound together. The electrode is divided into a positive electrode and a negative electrode, and the separator is disposed between the positive electrode and the negative electrode. The electrode and separator are disposed inside the first housing 211, and an electrolyte can also be injected into the first housing 211.

[0210] In some embodiments, the electrode is formed by bonding an active material layer onto a metal layer. Electrodes of different polarities use different metal materials. The positive electrode can be formed by bonding a positive electrode paste onto at least one metal layer such as aluminum, platinum, nickel, tantalum, and titanium, with the positive electrode paste bonded to the metal layer forming the positive electrode active material layer. The negative electrode can be formed by bonding a negative electrode paste onto at least one metal layer such as copper, platinum, nickel, tantalum, and titanium, with the negative electrode paste bonded to the metal layer forming the negative electrode active material layer. For example, the positive electrode includes aluminum, and the negative electrode includes copper.

[0211] Please see Figure 5 and Figure 6 The first metal component 212 is a conductive component. A portion of the first metal component 212 is located inside the first housing 211 and is connected to the electrode and electrically conductive. A portion of the first metal component 212 extends out of the first housing 211 to draw out the polarity of the electrode.

[0212] In some embodiments, please refer to Figure 5 and Figure 6 The first metal part 212 extends from the first sealing edge 2111, that is, the first metal part 212 extends from one end of the first housing 211 in the second direction Y.

[0213] The first metal component 212 has a positive electrode and a negative electrode. The first metal component 212 with positive polarity is connected to the positive electrode plate, and the first metal component 212 with negative polarity is connected to the negative electrode plate. The first metal components 212 with different polarities are made of different materials. For example, the first metal component 212 with positive polarity includes an aluminum metal layer, and the first metal component 212 with negative polarity includes a copper metal layer or a copper-nickel plated metal layer.

[0214] Please see Figure 5 and Figure 7 The second battery cell 22 includes a second housing 221, an electrode assembly 2012, and a second metal component 222. The second metal component 222 is a conductive component that can lead out the polarity of the electrode assembly 2012 of the second battery cell 22. The polarity of the second metal component 222 and the first metal component 212 can be the same, or the polarity of the second metal component 222 and the first metal component 212 can be opposite. The arrangement of the second housing 221, electrode assembly 2012, and second metal component 222 of the second battery cell 22 can refer to the arrangement of the first housing 211, electrode assembly 2012, and first metal component 212 of the first battery cell 21 described above, and will not be repeated here.

[0215] In some embodiments, please refer to Figure 7 Along the second direction Y, the second metal part 222 extends from at least one end of the second housing 221, which is conducive to the centralized arrangement of the first metal part 212 and the second metal part 222.

[0216] In some embodiments, please refer to Figure 4 The electrode assembly 2012 also includes a third battery cell 23, a fourth battery cell 24 and other batteries stacked along the first direction X. The arrangement of the third battery cell 23, the fourth battery cell 24 and other batteries can refer to the arrangement of the first battery cell 21 and the second battery cell 22. The third battery cell 23, the fourth battery cell 24 and other batteries will not be described in detail here.

[0217] In some embodiments, please refer to Figure 8 The first battery cell 21 and the second battery cell 22 are stacked along a first direction X. Along a third direction Z, the battery cell assembly 20 has a first side portion 201 and a second side portion 202 disposed opposite to each other. The first side portion 201 is formed by combining the first battery cell 21, the second battery cell 22, the third battery cell 23, the fourth battery cell 24, or more batteries on one side of the third direction Z, and the second side portion 202 is formed by combining the first battery cell 21, the second battery cell 22, the third battery cell 23, the fourth battery cell 24, or more batteries on the other side of the third direction Z. Along a second direction Y, the battery cell assembly 20 has a third side portion 203 and a fourth side portion 204 disposed opposite to each other. The third side portion 203 is formed by combining the first battery cell 21, the second battery cell 22, the third battery cell 23, the fourth battery cell 24, or more battery cells on one side of the second direction Y, and the fourth side portion 204 is formed by combining the first battery cell 21, the second battery cell 22, the third battery cell 23, the fourth battery cell 24, or more battery cells on the other side of the second direction Y.

[0218] In some embodiments, please refer to Figure 8The first metal part 212 and the second metal part 222 are both located on the third side 203, which facilitates the connection between the first metal part 212 and the second metal part 222. The first metal part 212 and the second metal part 222 can be electrically connected by direct contact, by welding, or by hot pressing. No specific limitation is made here.

[0219] In other embodiments, both the first metal member 212 and the second metal member 222 extend from the fourth side 204. The first metal member 212 and the second metal member 222 can be electrically connected by direct contact, welding, or thermocompression, without specific limitations. In some embodiments, the first metal member 212 extends from the third side 203, and the second metal member 222 extends from the fourth side 204. The first metal member 212 extends from the third side 203 to the fourth side 204 to contact, weld, or thermocompress with the second metal member 222 for electrical connection. In some embodiments, the first metal member 212 extends from the fourth side 204, and the second metal member 222 extends from the third side 203. The first metal member 212 extends from the fourth side 204 to the third side 203 to contact, weld, or thermocompress with the second metal member 222 for electrical connection.

[0220] In some embodiments, please refer to Figure 8 and Figure 9 The first metal component 212 is connected to the second metal component 222. The battery module 100 also includes a first elastic component 101, which is disposed between the first metal component 212 and the first housing 211. The first elastic component 101 supports the first metal component 212 and also acts as a buffer between the first metal component 212 and the first housing 211, thereby reducing the risk of deformation of the first metal component 212 under stress.

[0221] In some embodiments, please refer to Figure 8 and Figure 9 The number of first elastic elements 101 can be one, two, or more. The first elastic element 101 includes at least one material selected from rubber, silicone, foam, etc.

[0222] In some embodiments, please refer to Figure 8 and Figure 9 The battery module 100 also includes a fifth structural component 103, and the surface of the first elastic member 101 facing away from the first housing 211 is in contact with the fifth structural component 103. The fifth structural component 103 can hold and stabilize the first elastic member 101.

[0223] In some embodiments, please refer to Figure 8 and Figure 9The number of fifth structural components 103 can be one, two, or more. The fifth structural component 103 includes at least one of plastic, hard rubber, and aluminum alloy.

[0224] In some embodiments, please refer to Figures 8 to 10 The battery module 100 also includes a sixth structural member 104. Along the third direction Z, the first elastic member 101 has a first end 1011 and a second end 1012 disposed opposite to each other. The surface of the first end 1011 facing away from the first housing 211 is in contact with the fifth structural member 103, and the surface of the second end 1012 facing away from the first housing 211 is in contact with the sixth structural member 104. The simultaneous provision of the fifth structural member 103 and the sixth structural member 104 can further enhance the stabilizing effect of the first elastic member 101 and make the stabilizing effect on the first elastic member 101 more balanced.

[0225] In some embodiments, the number of sixth structural members 104 may be one, two, or more. The sixth structural member 104 includes at least one of plastic, hard rubber, and aluminum alloy. The materials of the fifth structural member 103 and the sixth structural member 104 may be the same or different.

[0226] In some embodiments, please refer to Figure 8 and Figure 9 The battery module 100 also includes a second elastic member 102, which is disposed around the first elastic member 101, and the second elastic member 102 further stabilizes the first elastic member 101. When there are multiple first elastic members 101, the second elastic member 102 stabilizes the multiple first elastic members 101.

[0227] In some embodiments, the number of second elastic elements 102 may be one, two, or more. The second elastic element 102 includes at least one material selected from rubber, silicone, foam, etc.

[0228] In some embodiments, please refer to Figure 8 and Figure 9 The first battery cell 21 further includes a third metal component 213, and the second battery cell 22 further includes a fourth metal component 223. Along the second direction Y, the third metal component 213 extends from one end of the first housing 211, and the fourth metal component 223 extends from one end of the second housing 221. Both the third metal component 213 and the fourth metal component 223 are located on the third side 203. The battery module 100 also includes a circuit board 105, which is connected to the first elastic member 101. The circuit board 105 is also connected to the third metal component 213 and the fourth metal component 223. The circuit board 105 is equipped with electronic components, enabling it to manage the first battery cell 21 and the second battery cell 22.

[0229] The third metal component 213 and the fourth metal component 223 are conductive components. The third metal component 213 can lead out the polarity of the first battery cell 21, and the fourth metal component 223 can lead out the polarity of the second battery cell 22. The polarities of the third metal component 213 and the fourth metal component 223 can be the same, or the polarities of the third metal component 213 and the fourth metal component 223 can be opposite.

[0230] Please see Figure 3 The first structural member 30 is at least partially disposed between the housing 10 and the first side portion 201. A first adhesive 10a is provided between the first structural member 30 and the housing 10, and a second adhesive 20a is provided between the first structural member 30 and the first side portion 201. Along the second direction Y, the first adhesive 10a has a first length L1, and the second adhesive 20a has a second length L2.

[0231] When only adhesive is used between the cell assembly 20 and the inner wall of the housing 10, the adhesive is relatively uniform and prone to cracking and extending from one side to the other when subjected to impact or internal stress. By providing a first structural member 30 between the first adhesive 10a and the second adhesive 20a, the first structural member 30 acts as a barrier when one of the first adhesive 10a and the second adhesive 20a cracks, preventing the other adhesive from cracking as a result, reducing the extension of adhesive cracks, and thus improving the impact resistance of the battery module.

[0232] In some embodiments, the distance between the first side portion 201 and the first structural member 30 in the third direction Z can be greater than, equal to or less than the distance between the first structural member 30 and the housing 10 in the third direction Z, and no specific limitation is made here.

[0233] In some embodiments, please refer to Figure 11 The first structural component 30 includes a first part 301 and a second part 302. The first part 301 is located between the first side portion 201 and the housing 10, and the second part 302 is located between the fourth side portion 204 and the housing 10. The first part 301 and the second part 302 can be directly connected by integral molding, or an intermediate component can be provided between the first part 301 and the second part 302 to achieve indirect connection. The second part 302 can insulate the fourth side portion 204 from the housing 10, and can also prevent the fourth side portion 204 from directly contacting the housing 10, thereby providing protection for the junction of the fourth side portion 204, the first side portion 201, and the housing 10.

[0234] In some embodiments, please refer to Figure 14The second part 302 is located between the fourth side 204 and the housing 10, so that there is a gap between the fourth side 204 and the housing 10 to accommodate the adhesive. A fifth adhesive 50a is provided between the fourth side 204 and the housing 10. After the fifth adhesive 50a solidifies, it can form a base support for the battery cell assembly 20, which can stabilize the battery cell assembly 20 and provide buffering and protection for the battery cell assembly 20.

[0235] In other embodiments, please refer to Figure 12 The first structural member 30 includes only the first portion 301 located between the first side portion 201 and the housing 10, while the fourth side portion 204 is in direct contact with the housing 10. The fourth side portion 204 can be made of an insulating material such as aluminum-plastic film to insulate it from the housing 10.

[0236] In some embodiments, the material of the first structural member 30 may be one or more of the above insulating materials such as polyvinyl chloride, polyethylene, chloroprene rubber, polycarbonate, silicone resin, unsaturated polyester resin or epoxy resin, which have advantages such as light weight, insulation and corrosion resistance.

[0237] In some embodiments, the material of the first structural member 30 may be one or more of the above metal materials such as steel, iron, copper or aluminum. The metal material can improve the structural strength of the first structural member 30 and further improve its impact resistance.

[0238] In some embodiments, please refer to Figure 11 and Figure 12 The first length L1 is greater than the second length L2, so that there is a second adhesive 20a between the first side 201 and the first structural component 30, which serves as a heat dissipation medium, and there is also a gap that facilitates heat dissipation. This allows the heat generated by the battery cell assembly 20 to be directed between the first side 201 and the first structural component 30, thereby improving the heat dissipation effect.

[0239] In some embodiments, please refer to Figure 8 and Figure 11The first metal component 212 is located on the third side 203 along the second direction Y. The first adhesive 10a has a portion extending from the fourth side 204 toward the third side 203, making the first adhesive 10a closer to the fourth side 204 than the third side 203. This allows the fourth side 204 to adhere to the first structural component 30 and also helps reduce the risk of the first adhesive 10a contacting the first metal component 212, thereby reducing the risk of the first adhesive 10a affecting the first metal component 212. Furthermore, the first metal component 212 can be electrically connected to other electronic components. Since other electronic components exist on the third side 203, having the first adhesive 10a extend from the fourth side 204 toward the third side 203 reduces the risk of the first adhesive 10a adhering to other electronic components on the third side 203, thus reducing the impact of the first adhesive 10a on these other electronic components.

[0240] In some other embodiments, a first adhesive 10a is provided between the fourth side 204 and the third side 203. The first adhesive 10a between the fourth side 204 and the third side 203 is closer to the fourth side 204 than the third side 203, and the first adhesive 10a is separate from the fourth side 204 and the third side 203. This helps to reduce the risk of the first adhesive 10a affecting the first metal part 212.

[0241] In some embodiments, please refer to Figure 9 and Figure 16 The first metal part 212 is located on the third side 203 along the second direction Y. The first adhesive 10a and the third side 203 have a first distance D1, so that the first adhesive 10a does not extend to the third side 203, which further reduces the risk that the first adhesive 10a will affect the first metal part 212 or other electronic components. It can also reduce the amount of the first adhesive 10a used, thereby reducing the overall weight of the battery module 100 and increasing the energy density of the battery module 100.

[0242] In some embodiments, please refer to Figure 13 and Figure 14A first space S1 exists between the first structural component 30 and the housing 10, and a second space S2 exists between the first structural component 30 and the first side portion 201. The first structural component 30 has a first hole 31 that connects the first space S1 and the second space S2. The first hole 31 on the first structural component 30, connecting the first space S1 and the second space S2, facilitates the entry of the first adhesive 10a from the first space S1 into the second space S2. The first adhesive 10a enters the second space S2 and forms a second adhesive 20a, thus ensuring that both the first space S1 and the second space S2 contain the first adhesive 10a. This eliminates the need for the initial application of adhesive to the first side portion 201, improving the assembly efficiency of the battery module 100. The adhesive remaining in the first hole 31 is a sixth adhesive 10b. The sixth adhesive 10b can be a part of the first adhesive 10a, a part of the second adhesive 20a, or a part of both the first adhesive 10a and the second adhesive 20a.

[0243] In some embodiments, please refer to Figure 13 and Figure 14 The first adhesive 10a and the second adhesive 20a are connected through the first hole 31, so that the first adhesive 10a and the second adhesive 20a are connected into a whole, which can improve the stability between the cell assembly 20, the first structural component 30 and the housing 10, and also facilitate the conduction of heat from the second adhesive 20a to the first adhesive 10a, thereby improving the heat dissipation effect of the battery module 100.

[0244] In some embodiments, please refer to Figure 14 and Figure 15 The number of first holes 31 is at least two. Multiple first holes 31 help to enlarge the opening connecting the first space S1 and the second space S2, further facilitating the entry of adhesive from the first space S1 into the second space S2 and increasing the amount of second adhesive 20a within the second space S2. By increasing the number of first holes 31 rather than directly enlarging them, the structural strength loss of the first structural member 30 can be reduced, lowering the risk of deformation due to stress. The specific number of first holes 31 can be 2, 3, 4, 5, 6, 7, 8, 9, or more; no specific limitation is made here.

[0245] In some embodiments, please refer to Figures 14 to 16 At least two first holes 31 are arranged along the first direction X, which allows the adhesive entering the second space S2 to extend along the first direction X, that is, to increase the length of the second adhesive 20a extending along the first direction X, thereby increasing the contact area between the first side 201 and the second adhesive 20a in the first direction X, so that the impact resistance and heat dissipation of the battery cell assembly 20 can be improved.

[0246] In some embodiments, please refer to Figures 14 to 16Along the third direction Z, the projection of the first hole 31 at least partially overlaps with the projection of the first battery cell 21 and / or the second battery cell 22, which facilitates the adhesive entering the second space S2 to directly contact the first battery cell 21 and / or the second battery cell 22, and can further increase the contact area between the second adhesive 20a and the first side 201, thereby improving the impact resistance and heat dissipation effect of the battery cell assembly 20.

[0247] In some embodiments, please refer to Figure 16 and Figure 17 The first metal component 212 is located on the third side 203. Along the second direction Y, there is a second distance D2 between the first hole 31 and the third side 203, and a third distance D3 between the first hole 31 and the fourth side 204. The second distance D2 is greater than the third distance D3. With this arrangement, the first hole 31 is closer to the fourth side 204 than the third side 203, making the distance between the second adhesive 20a in the second space S2 and the third side 203 greater than the distance between the second adhesive 20a and the fourth side 204. Setting the distance between the second adhesive 20a and the third side 203 to be larger can reduce the risk of the second adhesive 20a affecting the first metal component 212 or other electronic components.

[0248] In some embodiments, please refer to Figure 16 and Figure 17 Along the second direction Y, there is a first distance D1 between the first adhesive 10a and the third side 203. The first distance D1 is smaller than the second distance D2, which allows the first adhesive 10a to extend beyond the first hole 31 along the second direction Y, making it easier for the first adhesive 10a to enter the second space S2 through the first hole 31. It also allows the first adhesive 10a to enter the second space S2 more fully, increasing the amount of adhesive entering the second space S2, thereby improving the stability and heat dissipation effect of the battery cell assembly 20. After the first adhesive 10a enters the second space S2, it forms the second adhesive 20a.

[0249] In some embodiments, please refer to Figure 17 The first adhesive 10a has a boundary line T1 on the side facing the third side 203. The boundary line T1 is the line formed by the edge of the first adhesive 10a facing the third side 203 when viewed along the third direction Z. The first distance D1 is the minimum distance between the boundary line T1 and the third side 203.

[0250] It should be noted that the shapes formed by the first adhesive 10a and the second adhesive 20a in the actual product may be rectangular, elliptical, or have regular or irregular wavy edges. For example, the boundary line T1 is a wavy line. No specific limitation is made here.

[0251] In some embodiments, please refer to Figure 16 and Figure 17 Along the first direction X, the width of the first adhesive 10a is greater than the width of the second adhesive 20a. In other embodiments, along the first direction X, the width of the first adhesive 10a is less than or equal to the width of the second adhesive 20a.

[0252] In some embodiments, the width of the first adhesive 10a along the first direction X is greater than the width of the second adhesive 20a along the first direction X, which is beneficial for saving adhesive.

[0253] In some embodiments, the first adhesive 10a and the second adhesive 20a may be adhesives capable of switching between fluid and solid structures. Exemplarily, after the first adhesive 10a is disposed in the first space S1 in a fluid structure, it transitions from a fluid structure to a solid structure over time. The adhesive located in the first space S1 forms the first adhesive 10a, and the adhesive located in the second space S2 forms the second adhesive 20a. The first adhesive 10a flowing into the second space S2 from the first space S1 forms the second adhesive 20a. The first adhesive 10a and the second adhesive 20a may be made of the same material. Exemplarily, the first adhesive 10a and the second adhesive 20a may be made of a material such as polyurethane adhesive, silicone adhesive, or epoxy resin adhesive, without specific limitations.

[0254] In other embodiments, please refer to Figure 18 The first metal part 212 is located on the third side 203. Along the second direction Y, the first adhesive 10a has a portion extending from the third side 203 toward the fourth side 204, so that the first adhesive 10a is closer to the third side 203 than the fourth side 204, which improves the heat dissipation effect on the third side 203, thereby helping to reduce the temperature of the first metal part 212 used for conduction, and improving the reliability of the cell assembly 20.

[0255] In some embodiments, a first adhesive 10a is provided between the fourth side portion 204 and the third side portion 203. The first adhesive 10a between the fourth side portion 204 and the third side portion 203 is closer to the third side portion 203 than the fourth side portion 204, and the first adhesive 10a is separate from the fourth side portion 204 and the third side portion 203, which is beneficial to improving the heat dissipation effect on the third side portion 203.

[0256] In some embodiments, please refer to Figure 15 There is a fourth distance D4 between the first adhesive 10a and the fourth side 204, so that the first adhesive 10a does not extend to the fourth side 204, thereby reducing the amount of the first adhesive 10a used, which can reduce the overall weight of the battery module 100 and increase the energy density of the battery module 100.

[0257] In some embodiments, please refer to Figure 18 The first metal component 212 is located on the third side 203. Along the second direction Y, the first adhesive 10a has a portion extending from the third side 203 toward the fourth side 204. Along the second direction Y, there is a second distance D2 between the first hole 31 and the third side 203, and a third distance D3 between the first hole 31 and the fourth side 204. The second distance D2 is smaller than the third distance D3. With this arrangement, the first hole 31 is closer to the third side 203 than the fourth side 204, making the distance between the second adhesive 20a and the third side 203 in the second space S2 smaller than the distance between the second adhesive 20a and the fourth side 204. Setting the distance between the second adhesive 20a and the third side 203 smaller improves the heat dissipation effect on the third side 203, thereby helping to reduce the temperature of the first metal component 212 used for conduction and improving the reliability of the battery cell assembly 20.

[0258] In some embodiments, please refer to Figure 18 Along the second direction Y, the first adhesive 10a has a portion extending from the third side 203 toward the fourth side 204. Along the second direction Y, there is a fourth distance D4 between the first adhesive 10a and the fourth side 204, which is smaller than the third distance D3. The smaller fourth distance D4 allows the first adhesive 10a to extend beyond the first hole 31 along the second direction Y, making it easier for the first adhesive 10a to enter the second space S2 through the first hole 31. It also allows the first adhesive 10a to enter the second space S2 more fully, increasing the amount of adhesive entering the second space S2, thereby improving the stability and heat dissipation of the battery cell assembly 20. After entering the second space S2, the first adhesive 10a forms the second adhesive 20a.

[0259] In some embodiments, please refer to Figure 19 and Figure 20 The battery module 100 also includes a second structural member 40, which is disposed between the housing 10 and the second side portion 202. A seventh adhesive 60a is provided between the second structural member 40 and the housing 10. The seventh adhesive 60a between the second structural member 40 and the housing 10 and the first adhesive 10a between the first structural member 30 and the housing 10 are adhesives of the same material. An eighth adhesive 70a is provided between the second structural member 40 and the second side portion 202. The eighth adhesive 70a between the second structural member 40 and the second side portion 202 and the second adhesive 20a between the first structural member 30 and the first side portion 201 are adhesives of the same material.

[0260] In some embodiments, along the second direction Y, the portion of the first adhesive 10a extending within the range of the third side 203 to the fourth side 204 has a first length L1, the portion of the seventh adhesive 60a extending within the range of the third side 203 to the fourth side 204 has a first length L1, the portion of the second adhesive 20a extending within the range of the third side 203 to the fourth side 204 has a second length L2, and the portion of the eighth adhesive 70a extending within the range of the third side 203 to the fourth side 204 has a second length L2, wherein the first length L1 is greater than the second length L2. Simultaneously providing the first structural member 30 and the second structural member 40 can further improve the stability between the cell assembly 20 and the housing 10, further improve the heat dissipation effect of the cell assembly 20, and also reduce the insulation effect between the cell assembly 20 and the housing 10.

[0261] In other embodiments, along the second direction Y, the length of the first adhesive 10a extending in the range from the third side 203 to the fourth side 204 is different from the length of the seventh adhesive 60a extending in the range from the third side 203 to the fourth side 204; the length of the second adhesive 20a extending in the range from the third side 203 to the fourth side 204 is different from the length of the eighth adhesive 70a extending in the range from the third side 203 to the fourth side 204.

[0262] The arrangement of the second structural member 40, the seventh adhesive 60a between the second structural member 40 and the housing 10, and the eighth adhesive 70a between the second structural member 40 and the second side portion 202 can be referred to the arrangement of the first structural member 30, the first adhesive 10a between the first structural member 30 and the housing 10, and the second adhesive 20a between the first structural member 30 and the first side portion 201, and will not be described in detail here.

[0263] In some embodiments, please refer to Figure 21 and Figure 22 The first battery cell 21 and the second battery cell 22 are stacked along a first direction X. Along the first direction X, the battery cell assembly 20 includes a first surface 205 and a second surface 206 disposed opposite to each other. The battery module 100 also includes a third structural member 50 and a fourth structural member 60. The third structural member 50 is disposed between the first surface 205 and the housing 10, and the fourth structural member 60 is disposed between the second surface 206 and the housing 10. A third adhesive 30a is provided between the third structural member 50 and the housing 10, and a fourth adhesive 40a is provided between the fourth structural member 60 and the housing 10.

[0264] The first surface 205 allows direct surface-to-surface contact between the battery cell assembly 20 and the third structural member 50, which improves the contact effect between them and enhances the heat dissipation of the battery cell assembly 20. Similarly, the second surface 206 allows direct surface-to-surface contact between the battery cell assembly 20 and the fourth structural member 60, further improving their contact effect and heat dissipation. The third structural member 50 and the fourth structural member 60 improve the insulation between the battery cell assembly 20 and the housing 10. The third adhesive 30a between the third structural member 50 and the housing 10 applies pressure to the battery cell assembly 20 in the first direction X, and the fourth adhesive 40a between the fourth structural member 60 and the housing 10 also applies pressure to the battery cell assembly 20 in the first direction X, thereby improving the stability of the battery cell assembly 20 relative to the housing 10. The third adhesive 30a and the fourth adhesive 40a can also act as heat-conducting media, further improving the heat dissipation effect of the battery cell assembly 20.

[0265] In some embodiments, the third structural member 50 and the first structural member 30 are not connected, which facilitates the assembly of the first structural member 30 and the third structural member 50 with the cell assembly 20, and also facilitates replacement after the third structural member 50 and the first structural member 30 are damaged.

[0266] In some embodiments, please refer to Figures 21 to 24 Along the second direction Y, the third adhesive 30a extends to a third length L3, which is greater than the second length L2. The fourth adhesive 40a extends to a fourth length L4, which is also greater than the second length L2. The greater length L3 increases the contact area between the third adhesive 30a and the third structural component 50, further improving heat dissipation for the battery cell assembly 20. It also further enhances the pressure exerted by the third adhesive 30a on the battery cell assembly 20 through the third structural component 50, thus improving the stability of the battery cell assembly 20 relative to the housing 10. Similarly, the greater length L4 increases the contact area between the fourth adhesive 40a and the fourth structural component 60, further improving heat dissipation for the battery cell assembly 20. It also further enhances the pressure exerted by the fourth adhesive 40a on the battery cell assembly 20 through the fourth structural component 60, thereby improving the stability of the battery cell assembly 20 relative to the housing 10.

[0267] In some embodiments, please refer to Figures 21 to 24The third structural component 50 is attached to the first surface 205, so that no adhesive is used between the third structural component 50 and the first surface 205, reducing the amount of adhesive used and thus reducing the overall weight of the battery module 100. The fourth structural component 60 is attached to the second surface 206, so that no adhesive is used between the fourth structural component 60 and the fourth surface, reducing the amount of adhesive used and thus reducing the overall weight of the battery module 100, which helps to improve the energy density of the battery module 100.

[0268] In some embodiments, please refer to Figure 25 A third space S3 is formed between the battery cell assembly 20 and the receiving cavity 1112. The third space S3 has a first volume V1, and a first adhesive 10a is disposed within the third space S3. The first adhesive 10a occupies a second volume V2, which is half the size of the first volume V1. Along the second direction Y, the portion of the first adhesive 10a extending from the third side 203 to the fourth side 204 has a first length L1, and the portion of the second adhesive 20a extending from the third side 203 to the fourth side 204 has a second length L2. The first length L1 is greater than the second length L2. Compared to filling the receiving cavity 1112 with adhesive, the arrangement in this embodiment can reduce the overall amount of adhesive used, thereby reducing the overall weight of the battery assembly and saving costs. Reducing the amount of adhesive can also reduce the curing time of the adhesive, improve the production efficiency, and thus reduce the process cost.

[0269] In the embodiment where the first structural member 30 is provided, the third space S3 refers to the space in the receiving cavity 1112 that does not include the battery cell assembly 20, the first structural member 30, and the second adhesive 20a after the battery cell assembly 20 and the first structural member 30 are placed in the receiving cavity 1112. The first volume V1 of the third space S3 is equal to the volume of the receiving cavity 1112 minus the volume of the battery cell assembly 20, the first structural member 30, and the second adhesive 20a.

[0270] In the embodiment where the second structural member 40 is provided, the sum of the volume of the first adhesive 10a and the volume of the seventh adhesive 60a is the second volume V2. The third space S3 refers to the space within the receiving cavity 1112 after the battery cell assembly 20, the first structural member 30, and the second structural member 40 are placed, excluding the space within the receiving cavity 1112 containing the battery cell assembly 20, the first structural member 30, the second structural member 40, the second adhesive 20a, and the eighth adhesive 70a. The first volume V1 of the third space S3 is equal to the volume of the receiving cavity 1112 minus the volumes of the battery cell assembly 20, the first structural member 30, the second structural member 40, the second adhesive 20a, and the eighth adhesive 70a.

[0271] In the embodiment where the first structural member 30, the second structural member 40, the third structural member 50, and the fourth structural member 60 are provided, the sum of the volumes of the first adhesive 10a, the third adhesive 30a, the fourth adhesive 40a, and the seventh adhesive 60a is the second volume V2. The third space S3 refers to the space within the receiving cavity 1112 that does not include the battery cell assembly 20, the first structural member 30, the second structural member 40, the third structural member 50, the fourth structural member 60, the eighth adhesive 70a, and the second adhesive 20a after the battery cell assembly 20, the first structural member 30, the second structural member 40, the third structural member 50, the fourth structural member 60, the eighth adhesive 70a, and the second adhesive 20a. The first volume V1 of the third space S3 is equal to the volume of the receiving cavity 1112 minus the volumes of the battery cell assembly 20, the first structural member 30, the second structural member 40, the third structural member 50, the fourth structural member 60, the eighth adhesive 70a, and the second adhesive 20a.

[0272] In some embodiments, the second volume V2 is half of the first volume V1. See [link to relevant documentation]. Figure 26 The first metal part 212 is located on the third side 203, and a fifth distance D5 is provided between the third side 203 and the fourth side 204 along the second direction Y. Along the second direction Y, the first adhesive 10a has a portion extending from the fourth side 204 toward the third side 203, and a first length L1 greater than half of the fifth distance D5. This can improve the stability of the battery cell assembly 20 while reducing the overall amount of adhesive used, increase the contact area between the first adhesive 10a and the first structural member 30, and thus improve the heat dissipation effect on the battery cell assembly 20 and the first structural member 30.

[0273] In some embodiments, please refer to Figure 27 The first length L1 is equal to the second length L2, which makes the stress situation between the first structural component 30 and the cell assembly 20 close to the stress situation between the first structural component 30 and the shell 10, thereby reducing the risk of deformation of the first structural component 30 due to uneven stress.

[0274] In some embodiments, please refer to Figure 28 The first length L1 is smaller than the second length L2, which can increase the amount of adhesive between the first structural member 30 and the cell assembly 20, that is, increase the contact area between the second adhesive 20a and the first structural member 30, and further improve the stability of the cell assembly 20 relative to the housing 10.

[0275] In some embodiments, please refer to Figure 28The second structural member 40 is disposed between the housing 10 and the second side portion 202. A seventh adhesive 60a is provided between the second structural member 40 and the housing 10, and an eighth adhesive 70a is provided between the second structural member 40 and the second side portion 202. Along the second direction Y, the portion of the seventh adhesive 60a extending within the range from the third side portion 203 to the fourth side portion 204 has a first length L1, and the portion of the eighth adhesive 70a extending within the range from the third side portion 203 to the fourth side portion 204 has a second length L2. The first length L1 is less than the second length L2. The simultaneous provision of the first structural member 30 and the second structural member 40 can further improve the stability between the cell assembly 20 and the housing 10, further improve the heat dissipation effect of the cell assembly 20, and also reduce the insulation effect between the cell assembly 20 and the housing 10.

[0276] In some embodiments, please refer to Figure 21 , Figure 22 as well as Figure 28 The first battery cell 21 and the second battery cell 22 are stacked along a first direction X. Along the first direction X, the battery cell assembly 20 includes a first surface 205 and a second surface 206 disposed opposite to each other. The battery module 100 also includes a third structural member 50 and a fourth structural member 60. The third structural member 50 is disposed between the first surface 205 and the housing 10, and the fourth structural member 60 is disposed between the second surface 206 and the housing 10. A third adhesive 30a is provided between the third structural member 50 and the housing 10, and a fourth adhesive 40a is provided between the fourth structural member 60 and the housing 10. Along the second direction Y, the portion of the first adhesive 10a extending within the range from the third side 203 to the fourth side 204 has a first length L1, and the portion of the second adhesive 20a extending within the range from the third side 203 to the fourth side 204 has a second length L2. The first length L1 is less than the second length L2.

[0277] The first surface 205 allows direct surface-to-surface contact between the battery cell assembly 20 and the third structural member 50, which improves the contact effect between them and enhances heat dissipation. Similarly, the second surface 206 allows direct surface-to-surface contact between the battery cell assembly 20 and the fourth structural member 60, further improving contact and heat dissipation. The third and fourth structural members 50 enhance insulation between the battery cell assembly 20 and the housing 10. The third adhesive 30a between the third structural member 50 and the housing 10 applies pressure to the battery cell assembly 20 in the first direction X, and the fourth adhesive 40a between the fourth structural member 60 and the housing 10 also applies pressure, thus improving the stability of the battery cell assembly 20 relative to the housing 10. The third adhesive 30a and the fourth adhesive 40a can also act as heat-conducting media, further improving the heat dissipation effect of the battery cell assembly 20.

[0278] In some embodiments, please refer to Figure 25 and Figure 28 A third space S3 is formed between the battery cell assembly 20 and the receiving cavity 1112. The third space S3 has a first volume V1, and a first adhesive 10a is disposed within the third space S3. The first adhesive 10a occupies a second volume V2, which is half the size of the first volume V1. Along the second direction Y, the portion of the first adhesive 10a extending from the third side 203 to the fourth side 204 has a first length L1, and the portion of the second adhesive 20a extending from the third side 203 to the fourth side 204 has a second length L2. The first length L1 is less than the second length L2. Compared to filling the receiving cavity 1112 with adhesive, the arrangement in this embodiment can reduce the overall amount of adhesive used, thereby reducing the overall weight of the battery assembly and saving costs. Reducing the amount of adhesive can also reduce the curing time of the adhesive, improve the process production efficiency, and thus reduce the process cost.

[0279] Please see Figure 29 The embodiments of this application also provide an electrical device 1000, which includes a device body 200 and a battery module 100 as described in any of the above embodiments, with the battery module 100 mounted on the device body 200. Since the heat dissipation effect of the battery module 100 in any of the above embodiments is improved, the heat dissipation effect of the electrical device 1000 using any of the above embodiments is improved, thereby increasing the reliability of the electrical device 1000.

[0280] Since the electrical equipment 1000 adopts the technical solution of any embodiment of the battery module 100 described above, it has at least the beneficial effects brought about by the technical solution of any embodiment of the battery module 100 described above, which will not be described in detail here.

[0281] Among them, electrical equipment 1000 can be drones, power tools, two-wheeled electric vehicles, cleaning robots, energy storage equipment, etc.

[0282] This application also provides different embodiments of the potting method suitable for battery modules:

[0283] Example 1

[0284] The battery module includes a housing, a cell assembly, and a first structural member. The housing has a receiving cavity. The cell assembly includes a first cell and a second cell, stacked along a first direction. Along a second direction, one end of the first cell extends out with a first metal member. Along a third direction, the cell assembly has a first side and a second side disposed opposite to each other. Along a third direction, the first structural member is at least partially disposed on one side of the first side, and along a third direction, the first structural member has a through-hole. The potting method includes:

[0285] Glue pouring step: Pour the adhesive into the receiving cavity;

[0286] Installation steps: Install the battery cell assembly into the receiving cavity;

[0287] Pressing process: Control the cell assembly to be squeezed into the adhesive, so that the adhesive flows between the cell assembly and the housing, and the adhesive enters between the first side and the first structural component through the first hole.

[0288] The potting method provided in this embodiment has the following beneficial effects:

[0289] The adhesive can enter the second space from the first space through the first hole, so that the first space contains the first adhesive and the second space contains the second adhesive. This can save the step of brushing adhesive on the first side first and improve the assembly efficiency of the battery module.

[0290] The first adhesive and the second adhesive can be connected through the first hole, making the first adhesive and the second adhesive a whole. This can improve the stability of the cell assembly and the first structural component, and also facilitate the conduction of heat from the second adhesive to the first adhesive, thus improving the heat dissipation effect of the battery module.

[0291] The first length is greater than the second length, so that there is both a second adhesive that acts as a heat dissipation medium and a gap that facilitates heat dissipation between the first side and the first structural component, thereby guiding the heat generated by the battery cell assembly between the first side and the first structural component, thus improving the heat dissipation effect.

[0292] Example 2

[0293] The battery module includes a housing, a cell assembly, and a first structural member. The housing has a receiving cavity. The cell assembly includes a first cell and a second cell, stacked along a first direction. Along a second direction, one end of the first cell extends out with a first metal member. Along a third direction, the cell assembly has a first side and a second side disposed opposite to each other. Along a third direction, the first structural member is at least partially disposed on one side of the first side, and along a third direction, the first structural member has a through-hole. The potting method includes:

[0294] Installation steps: Install the battery cell assembly into the receiving cavity;

[0295] Adhesive pouring step: The adhesive is poured into the receiving cavity, so that the adhesive between the cell assembly and the housing enters between the first side and the first structural component through the first hole.

[0296] In some embodiments, the dispensing step further includes:

[0297] Settling step: After the adhesive is poured into the receiving cavity, it is left to stand for a period of time, allowing the adhesive to enter between the first side and the first structural member through the first hole by means of its own fluid properties and gravity.

[0298] In some embodiments, the dispensing step further includes:

[0299] Pressure application step: Apply pressure to the adhesive poured into the receiving cavity, causing the adhesive in the receiving cavity to flow under pressure, thereby entering between the first side and the first structural member through the first hole.

[0300] The potting method provided in this embodiment has the following beneficial effects:

[0301] The adhesive can enter the second space from the first space through the first hole, so that the first space contains the first adhesive and the second space contains the second adhesive. This can save the step of brushing adhesive on the first side first and improve the assembly efficiency of the battery module.

[0302] The first adhesive and the second adhesive can be connected through the first hole, making the first adhesive and the second adhesive a whole. This can improve the stability of the cell assembly and the first structural component, and also facilitate the conduction of heat from the second adhesive to the first adhesive, thus improving the heat dissipation effect of the battery module.

[0303] The first length is greater than the second length, so that there is both a second adhesive that acts as a heat dissipation medium and a gap that facilitates heat dissipation between the first side and the first structural component, thereby guiding the heat generated by the battery cell assembly between the first side and the first structural component, thus improving the heat dissipation effect.

[0304] Example 3

[0305] The potting methods include:

[0306] Glue application steps: Apply second adhesive to the first side to fix the first structural component to the third-side upward side of the first side through the second adhesive;

[0307] Glue pouring step: Pour the adhesive into the receiving cavity;

[0308] Installation steps: Install the battery cell assembly into the receiving cavity;

[0309] Pressing process: Control the cell assembly to be squeezed into the adhesive, so that there is a first adhesive between the first structural component and the housing.

[0310] The potting method provided in this embodiment has the following beneficial effects:

[0311] It can precisely control the amount of the second adhesive, thus adapting to battery modules that prioritize heat dissipation or those that require weight reduction to increase energy density.

[0312] This allows for a more uniform distribution of the second adhesive within the second space and also reduces the thickness of the second adhesive in the third direction, thereby reducing the amount of adhesive while increasing the contact area between the second adhesive and the battery cell assembly and the first structural component.

[0313] In some embodiments, the first structural member does not have a first hole, and the second adhesive is applied by brushing adhesive in Embodiment 2.

[0314] This application provides a method for measuring the first volume of a third space in some embodiments:

[0315] Steps for calculating the volume of the containment cavity: After emptying the containment cavity, fill it with liquid, and then pour the filled liquid into measuring instruments such as measuring cups for measurement;

[0316] The first volume measurement step: After placing the battery cell assembly or the battery cell assembly and the insulating parts into the receiving cavity, fill it with liquid, and then pour the filled liquid into the measuring instrument for measurement;

[0317] Step for measuring the second volume: Inject adhesive into the measuring instrument, and adjust the amount injected to half of the first volume using the measuring instrument.

[0318] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A battery module, characterized in that, include: The housing has a receiving cavity; A battery cell assembly is installed in the receiving cavity. The battery cell assembly includes a first battery cell and a second battery cell. Along a first direction, the first battery cell and the second battery cell are stacked. Along a second direction, one end of the first battery cell has a first metal piece extending out. Along a third direction, the battery cell assembly has a first side and a second side disposed opposite to each other. Along the second direction, the battery cell assembly has a third side and a fourth side disposed opposite to each other. The first direction is perpendicular to the second direction and the third direction. A first structural member is at least partially disposed between the housing and the first side portion; A first adhesive is provided between the first structural component and the housing, and a second adhesive is provided between the first structural component and the first side portion; Along the second direction, the first adhesive has a first length, and the second adhesive has a second length; The first structural component has a first hole, through which the first adhesive and the second adhesive are connected.

2. The battery module according to claim 1, characterized in that, The first length is greater than the second length.

3. The battery module according to claim 2, characterized in that, There is a first space between the first structural member and the housing, and a second space between the first structural member and the first side portion. The first hole connects the first space and the second space.

4. The battery module according to claim 3, characterized in that, The number of the first holes is at least two.

5. The battery module according to claim 4, characterized in that, At least two of the first holes are arranged along the first direction.

6. The battery module according to claim 3, characterized in that, Along the third direction, the projection of the first hole at least partially overlaps with the projection of the first battery cell.

7. The battery module according to claim 3, characterized in that, Along the third direction, the projection of the first hole at least partially overlaps with the projections of the first battery cell and the second battery cell.

8. The battery module according to claim 3, characterized in that, The first metal component is located on the third side; Along the second direction, the first adhesive has a portion extending from the fourth side toward the third side.

9. The battery module according to claim 8, characterized in that, Along the second direction, there is a second distance between the first hole and the third side, and a third distance between the first hole and the fourth side, wherein the second distance is greater than the third distance.

10. The battery module according to claim 9, characterized in that, Along the second direction, there is a first distance between the first adhesive and the third side portion, the first distance being less than the second distance.

11. The battery module according to claim 3, characterized in that, The first metal component is located on the third side; Along the second direction, the first adhesive has a portion extending from the third side toward the fourth side.

12. The battery module according to claim 11, characterized in that, Along the second direction, there is a second distance between the first hole and the third side, and a third distance between the first hole and the fourth side, wherein the second distance is less than the third distance.

13. The battery module according to claim 12, characterized in that, Along the second direction, there is a fourth distance between the first adhesive and the fourth side portion, the fourth distance being smaller than the third distance.

14. The battery module according to claim 2, characterized in that, The battery module further includes a second structural component, which is disposed between the housing and the second side portion. A seventh adhesive is provided between the second structural component and the housing, and an eighth adhesive is provided between the second structural component and the second side portion.

15. The battery module according to claim 2, characterized in that, Along the first direction, the cell assembly includes a first surface and a second surface disposed opposite to each other, and the battery module further includes: A third structural component is disposed between the first surface and the housing, and a third adhesive is provided between the third structural component and the housing; A fourth structural component is disposed between the second surface and the housing, and a fourth adhesive is provided between the fourth structural component and the housing.

16. The battery module according to claim 15, characterized in that, Along the second direction, the third adhesive extends a third length, which is greater than the second length.

17. The battery module according to claim 15, characterized in that, Along the second direction, the fourth adhesive extends a fourth length, which is greater than the second length.

18. The battery module according to claim 15, characterized in that, The third structural component is attached to the first surface, and the fourth structural component is attached to the second surface.

19. The battery module according to claim 2, characterized in that, A third space is formed between the battery cell assembly and the receiving cavity. The third space has a first volume, and the first adhesive is disposed in the third space. The first adhesive occupies a second volume, which is half of the first volume.

20. The battery module according to claim 2, characterized in that, The first metal part is located on the third side, and there is a fifth distance between the third side and the fourth side along the second direction. The first length is greater than half of the fifth distance.

21. The battery module according to claim 1, characterized in that, The first length is less than the second length.

22. The battery module according to claim 21, characterized in that, The battery module further includes a second structural component, which is disposed between the housing and the second side portion. A seventh adhesive is provided between the second structural component and the housing, and an eighth adhesive is provided between the second structural component and the second side portion.

23. The battery module according to claim 21, characterized in that, Along the first direction, the cell assembly includes a first surface and a second surface disposed opposite to each other, and the battery module further includes: A third structural component is disposed between the first surface and the housing, and a third adhesive is provided between the third structural component and the housing; A fourth structural component is disposed between the second surface and the housing, and a fourth adhesive is provided between the fourth structural component and the housing.

24. The battery module according to claim 21, characterized in that, A third space is formed between the battery cell assembly and the receiving cavity. The third space has a first volume, and the first adhesive is disposed in the third space. The first adhesive occupies a second volume, which is half of the first volume.

25. The battery module according to claim 1, characterized in that, The first metal component is located on the third side; The first structural member includes a first part and a second part, the first part being located between the first side and the housing, and the second part being located between the fourth side and the housing.

26. The battery module according to claim 25, characterized in that, A fifth adhesive is provided between the fourth side and the housing.

27. The battery module according to claim 1, characterized in that, The first battery cell includes a first housing, and along the second direction, the first metal member extends from one end of the first housing. The second battery cell includes a second housing and a second metal member, and along the second direction, the second metal member extends from one end of the second housing.

28. The battery module according to claim 27, characterized in that, Both the first metal part and the second metal part are located on the third side.

29. The battery module according to claim 28, characterized in that, The first metal component is connected to the second metal component, and the battery module further includes a first elastic component, which is disposed between the first metal component and the first housing.

30. The battery module according to claim 29, characterized in that, The battery module further includes a fifth structural component, and the surface of the first elastic element facing away from the first housing is connected to the fifth structural component.

31. The battery module according to claim 30, characterized in that, The battery module further includes a sixth structural member. Along the third direction, the first elastic member has a first end and a second end disposed opposite to each other. The surface of the first end facing away from the first housing is connected to the fifth structural member, and the surface of the second end facing away from the first housing is connected to the sixth structural member.

32. The battery module according to claim 29, characterized in that, The battery module also includes a second elastic element, which is disposed around the first elastic element.

33. The battery module according to claim 29, characterized in that, The first battery cell further includes a third metal component, and the second battery cell further includes a fourth metal component. Along the second direction, the third metal component extends from one end of the first housing, and the fourth metal component extends from one end of the second housing. Both the third metal component and the fourth metal component are located on the third side. The battery module also includes a circuit board, which is connected to the first elastic member, and the circuit board is also connected to the third metal member and the fourth metal member.

34. An electrical appliance, characterized in that, It includes a device body and a battery module as described in any one of claims 1 to 33, wherein the battery module is mounted on the device body.

35. A potting method suitable for battery modules, characterized in that, The battery module includes a housing, a cell assembly, and a first structural component; The housing is provided with a receiving cavity; The battery cell assembly includes a first battery cell and a second battery cell. Along a first direction, the first battery cell and the second battery cell are stacked. Along a second direction, one end of the first battery cell has a first metal piece extending out. Along a third direction, the battery cell assembly has a first side and a second side that are disposed opposite to each other. The first direction is perpendicular to the second direction and the third direction. Along the third direction, at least a portion of the first structural member is disposed on one side of the first side portion, and along the third direction, the first structural member is provided with a through first hole; The potting method includes the following steps: Glue pouring step: Pour adhesive into the receiving cavity; Installation step: The battery cell assembly is installed into the receiving cavity; Adhesive pressing step: Control the cell assembly to be squeezed into the adhesive, so that the adhesive flows between the cell assembly and the housing, and the adhesive enters between the first side and the first structural member through the first hole.

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