Battery module and electric equipment

Abstract

The invention discloses a battery module and electric equipment. The battery module comprises a circuit board, a bonding piece and a plurality of battery cells, the plurality of battery cells are arranged along a first direction, each battery cell comprises an electrode assembly, a shell and an electrode terminal, the shell comprises a main body part and a top sealing part which are connected with each other, the electrode assembly is accommodated in the main body part, one end of the electrode terminal is electrically connected to the electrode assembly, and the other end of the electrode terminal extends out from the top sealing part; the first direction is the width direction or the length direction of the battery cell. And the circuit board is connected with the electrode terminals of the plurality of battery cells. The bonding piece is used for bonding the main body parts and the top sealing parts of the plurality of battery cells, the bonding piece covers at least part of the surface of the circuit board, and the bonding piece covers at least part of the surface of the electrode terminal; and the bonding piece is formed on the surfaces of the circuit board and the plurality of battery cells through injection molding.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and in particular relates to a battery module and electrical equipment. Background Art

[0002] At present, in electronic products such as notebooks and tablet computers, the battery module is usually embedded in a plastic frame, and the plastic frame is connected to the electronic product, so that the battery module is fixed. At the same time, in order to protect the battery module, a filler such as a first adhesive tape or foam is provided between the battery module and the plastic frame to reduce the risk of the battery module being damaged by the plastic frame. However, this assembly method has the disadvantages of being cumbersome and affecting the energy density of the battery module. Summary of the invention

[0003] In view of the above situation, it is necessary to provide a battery module that simplifies the assembly process and improves the energy density.

[0004] An embodiment of the present application provides a battery module, including a circuit board, an adhesive and a plurality of battery cells. The plurality of battery cells are arranged along a first direction, each battery cell includes an electrode assembly, a shell and an electrode terminal, the shell includes a main body and a top seal portion connected to each other, the electrode assembly is accommodated in the main body, one end of the electrode terminal is electrically connected to the electrode assembly, and the other end of the electrode terminal extends from the top seal portion, and the first direction is the width direction or length direction of the battery cell. The circuit board connects the electrode terminals of the plurality of battery cells. The adhesive adheres the main body and the top seal of the plurality of battery cells, the adhesive covers at least part of the surface of the circuit board, and the adhesive covers at least part of the surface of the electrode terminal; the adhesive is formed on the surface of the circuit board and the plurality of battery cells by injection molding.

[0005] In the above-mentioned battery module, the adhesive is directly connected to the main body and the top sealing part of multiple battery cells by injection molding, and covers at least part of the surface of the circuit board, and covers at least part of the surface of the electrode terminal, which plays a protective role for the battery cells and circuit boards (such as insulation, waterproofing, salt spray corrosion protection, drop resistance, etc.), which is conducive to simplifying the assembly process of the battery module and improving assembly efficiency. It is also conducive to reducing the number of accessories used to protect the battery cells and improving the energy density of the battery module. In addition, the adhesive is directly formed on the surface of the circuit board and multiple battery cells by injection molding, which is also conducive to improving the bonding strength of the adhesive to the circuit board and multiple shells, reducing the risk of relative movement between the circuit board and the shell, and improving the seismic performance of the battery module. Compared with the traditional solution of wrapping the battery cell head with adhesive paper, the adhesive of the present application is directly formed on the surface of the circuit board and multiple battery cells through injection molding, so that the circuit board and multiple battery cells form an integrated structure, which improves the overall structural rigidity of the battery module and helps to reduce the risk of deformation of the battery module. At the same time, it is also helpful to reduce the impact of relative movement between different battery cells, between battery cells and circuit boards, and between battery cells and adhesive paper (such as friction noise, friction damage, etc.).

[0006] In some embodiments of the present application, the adhesive is provided with a through hole, and the through hole is configured to be detachably connected to an external electrical device. By passing the fastener through the through hole and connecting the external electrical device, the battery module can be fixed to the external electrical device, and the fastener does not need to act on the battery cell, which is beneficial to reduce the impact of the fastener on the battery cell. On the other hand, the fastener is connected to the battery cell and the circuit board through the adhesive to which it is connected, which can play a heat conductive role, which is beneficial to the heat distribution and heat dissipation of the battery module during the charging and discharging process, and improves the safety and reliability of the battery module.

[0007] In some embodiments of the present application, the battery module further includes a structural member, the adhesive member is bonded to the structural member and covers at least a portion of the surface of the structural member, and the through hole passes through the structural member. By providing the structural member, it is beneficial to increase the structural strength of the connection area surrounding the through hole on the battery module, so that when the fastener passes through the through hole and connects to the external electrical device, the risk of the connection area being crushed by the fastener is reduced, and the stability and reliability of the battery module connecting to the external electrical device are improved.

[0008] In some embodiments of the present application, the through hole passes through the circuit board, which is beneficial to increase the structural strength of the connection area surrounding the through hole on the battery module, so as to reduce the risk of the connection area being damaged by the fastener when the fastener passes through the through hole and connects to the external electrical equipment, thereby improving the stability and reliability of the battery module connecting to the external electrical equipment.

[0009] In some embodiments of the present application, the adhesive member includes a base and a convex portion. The base covers at least a portion of the surface of the circuit board and at least a portion of the surface of the electrode terminal. The convex portion is connected to the base and extends in a direction away from the main body, and the through hole passes through the convex portion. By providing the convex portion and arranging the through hole in the convex portion, it is beneficial to increase the distance between the through hole and the battery cell and reduce the influence of the pressure of the fastener on the battery cell.

[0010] In some embodiments of the present application, the battery module further includes a connector, which is connected to the circuit board. The connector can be used to connect an external electrical device, so that the battery module and the external electrical device are electrically connected.

[0011] In some embodiments of the present application, the adhesive is provided with a first slot, and part of the connector is located in the first slot, which is beneficial to limit the movement of the connector and reduce the impact of the movement of the connector on the battery module and external electrical equipment. At the same time, it is also beneficial to reduce the number of accessories used to limit the connector and save the cost of the battery module.

[0012] In some embodiments of the present application, the battery module further comprises a bracket, the bracket is connected to the adhesive, and the bracket is configured to connect to an external electrical device so that the battery module is fixed to the external electrical device. The bracket fixes the battery module through the adhesive, which is conducive to reducing the influence of stress on the battery cell and improving the safety performance of the battery module.

[0013] In some embodiments of the present application, the adhesive member includes a convex portion, the convex portion is provided with a mounting hole, and the hole wall of the mounting hole is provided with a card slot. The battery module also includes a structural member, the outer peripheral surface of the structural member is provided with a flange, and the flange is snapped into the card slot. The portion of the structural member exposed in the mounting hole is provided with a through hole, and the through hole is configured to be detachably connected to an external electrical device. The flange and the card slot cooperate to increase the connection strength between the structural member and the convex portion to reduce the risk of the structural member being offset relative to the convex portion. When the fastener passes through the through hole and connects to the external electrical device, the structural member contacts the fastener, which can reduce the risk of the adhesive being crushed by the fastener and improve the stability and reliability of the battery module connecting to the external electrical device.

[0014] In some embodiments of the present application, the adhesive member includes a convex portion, and the convex portion includes a first mounting surface away from the main body. The battery module also includes a structural member, and the structural member includes a clamping portion and a protruding portion connected along the first arrangement direction. Observed along the first arrangement direction, the outer peripheral side of the protruding portion does not exceed the outer peripheral side of the clamping portion. A connecting hole is provided at a portion of the protruding portion close to the clamping portion, the clamping portion and the connecting hole are located in the protruding portion, and the adhesive member is also filled in the connecting hole. The protruding portion extends from the first mounting surface, and the portion of the protruding portion extending from the first mounting surface is configured to be detachably connected to an external electrical device. The portions where the clamping portion and the protruding portion are provided with the connecting hole are pre-buried in the adhesive member, and the adhesive member is filled in the connecting hole, which can improve the connection strength between the structural member and the protruding portion to reduce the risk of the structural member shifting relative to the protruding portion. When the external electrical device is connected through the protruding portion, the structural member contacts the external electrical device, which can reduce the risk of damage to the adhesive member and improve the stability and reliability of the battery module connecting the external electrical device.

[0015] In some embodiments of the present application, a through hole is provided at the portion where the protruding portion extends from the first mounting surface, and the through hole is configured to be detachably connected to an external electrical device. When the fastener passes through the through hole and connects to the external electrical device, the structural member contacts the fastener, which can reduce the risk of the adhesive being crushed by the fastener and improve the stability and reliability of the battery module connecting to the external electrical device.

[0016] In some embodiments of the present application, the arithmetic mean deviation Ra of the profile of the outer surface of the clamping portion satisfies: 12.5 μm ≤ Ra ≤ 50 μm; the maximum height Rz of the profile of the outer surface of the clamping portion satisfies: Rz ≤ 3.2 μm. By limiting the roughness of the outer surface of the clamping portion, the connection strength between the clamping portion and the protrusion is improved.

[0017] In some embodiments of the present application, a receiving space is formed between two adjacent main body parts along the first direction. The shell also includes a side sealing portion, which is connected to the main body and is located at the end of the main body along the first direction. The first direction is the width direction of the battery cell. The adhesive also includes a base, an extension portion, a first part and a second part. The base covers at least part of the surface of the circuit board and covers at least part of the surface of the electrode terminal. At least part of the extension portion is located in the receiving space and bonds two adjacent main body parts. The first part covers the ends of multiple main body parts away from the top sealing portion. The second part is connected to the base and bonds the side sealing portion of the battery cell located on the outside along the first direction, and the second part is also connected to the first part. The convex portion is connected to at least one of the base, the first part and the second part, and the convex portion is extended in a direction away from the main body.

[0018] In some embodiments of the present application, the main body includes a top wall and a first wall and a second wall located on both sides of the top wall along a third direction. The third direction is the thickness direction of the battery cell. The top seal extends outward from the top wall along the second direction. The second direction is the length direction of the battery cell. The top wall includes a first top surface and a second top surface, the first top surface is located between the top seal and the first wall, and the second top surface is located between the top seal and the second wall. The circuit board is arranged on the first top surfaces of the plurality of battery cells, and the circuit board and the top seal are arranged opposite to each other along the third direction. The base covers the first top surface, the second top surface, the top seal, the electrode terminals and the circuit board, so as to facilitate the adaptation of the convex portion to the interfaces at different positions of the external electrical equipment.

[0019] In some embodiments of the present application, the circuit board includes a substrate and an electronic component. The substrate includes a first surface and a second surface arranged relative to each other along a third direction, the first surface is away from the top seal portion, the second surface is facing the top seal portion, and the electronic component is connected to the second surface. The base includes a first outer surface, and the first outer surface covers the first surface. The first outer surface is provided with a plurality of first positioning holes and a plurality of second positioning holes, a portion of the first surface is exposed to the first positioning holes and the second positioning holes, the plurality of first positioning holes are arranged at intervals along the first direction, and the second positioning holes are distributed on both sides of each first positioning hole. The first positioning hole and the second positioning hole are used to pass the positioning pin during the formation of the adhesive, so as to limit the position of the circuit board in the base, thereby reducing the risk of skew and misalignment of the circuit board. In addition, by arranging the plurality of first positioning holes at intervals, it is beneficial to provide space for releasing the stress on the base and improve the stability of the base structure.

[0020] In some embodiments of the present application, the base also includes a second outer side surface, and the second outer side surface covers the second surface. The second outer side surface is provided with a plurality of third positioning holes, and a portion of the second surface is exposed in the third positioning holes. When observed along the third direction, the third positioning holes are spaced apart from the electronic components, and each third positioning hole overlaps with a first positioning hole. The third positioning holes are used to pass the positioning pins during the formation of the adhesive, so as to limit the position of the circuit board in the base, thereby reducing the risk of the circuit board being skewed and misplaced. In addition, the spacing of the plurality of third positioning holes is conducive to providing space for releasing the stress on the base, thereby improving the stability of the base structure.

[0021] In some embodiments of the present application, the second outer side surface includes a first zone, a second zone, and a third zone. Along the third direction, the circuit board overlaps with the first zone. Along the third direction, the second top surface overlaps with the second zone. The third zone is connected to the first zone and the second zone, and along the second direction, the third zone is arranged opposite to the second top surfaces of the plurality of battery cells. Along the third direction, the distance between the first zone and the first wall is D1, and the distance between the second zone and the first wall is D2, D1 is less than D2, and the difference between D1 and D2 is 0.5 mm to 3 mm. The first zone, the second zone, and the third zone constitute a step surface to facilitate the overlap of the second outer side surface with the external electrical equipment, which is beneficial to improve the stability and reliability of the battery module 100 in connecting the external electrical equipment.

[0022] In some embodiments of the present application, the extension portion includes a first end and a second end, and along the third direction, the first end is adjacent to the first wall, and the second end is adjacent to the second wall. The first end extends along the first direction to two first walls adjacent to the accommodation space, and / or the second end extends along the first direction to two second walls adjacent to the accommodation space, so as to increase the bonding area between the adhesive and the battery cell and improve the bonding strength between the adhesive and the battery cell.

[0023] In some embodiments of the present application, along the first direction, the length of the overlapping portion between each first end and the first wall of a battery cell is 5mm to 10mm, and / or the length of the overlapping portion between the second end and the second wall of a battery cell is 5mm to 10mm, so as to improve the bonding strength between the adhesive and the battery cell, and help to reduce the space waste caused by the excessive length of the first end and the second end, and improve the energy density of the battery module.

[0024] In some embodiments of the present application, the thickness of the extension portion covering the first wall is 0.2 mm to 2 mm; and / or the thickness of the extension portion covering the second wall is 0.2 mm to 2 mm, so as to improve the bonding strength between the adhesive and the battery cell, and help reduce the space waste caused by the excessive thickness of the extension portion, thereby improving the energy density of the battery module.

[0025] In some embodiments of the present application, the battery module further includes a connector, one end of which is electrically connected to the circuit board, and the other end of which is configured to be electrically connected to an external electrical device. The adhesive covers the connector. The adhesive is provided with a through hole extending along the second direction, and the connector is at least partially located in the through hole. When viewed along the second direction, the hole wall of the through hole abuts against the outer peripheral side of the connector, which is conducive to limiting the movement of the connector and reducing the impact of the movement of the connector on the battery module and the external electrical device. At the same time, it is also conducive to reducing the number of accessories used to limit the connector and saving the cost of the battery module.

[0026] In some embodiments of the present application, the adhesive is provided with a plurality of openings connected to the through holes, a portion of the connector is exposed from the openings, and the plurality of openings are arranged at intervals. The plurality of openings are arranged at intervals, which is conducive to providing space for releasing stress on the part where the adhesive covers the connector, and improving the stability of the structure of the part where the adhesive covers the connector.

[0027] In some embodiments of the present application, the connector includes a wiring harness and a connector. The wiring harness includes a first section, a second section, and a third section. Along the second direction, the second section is located on a side of the base away from the battery cell. One end of the second section is electrically connected to the circuit board, and the other end of the second section is connected to the first section. The first section extends from the end of the main body close to the top seal to the end of the main body away from the top seal, the second part covers the first section, and the first section is at least partially located in the through hole to limit the movement of the first section and the second section. One end of the third section is connected to the connector, and the connector is configured to be electrically connected to an external electrical device, and the other end of the third section is connected to the first section.

[0028] In some embodiments of the present application, the adhesive member further includes a bearing portion, the bearing portion is connected to the first portion, and the bearing portion is provided with a second slot. The battery module further includes a temperature sensor, the temperature sensor includes a probe and a lead, the probe is arranged in the second slot and adjacent to the main body, one end of the lead is electrically connected to the probe, and the other end of the lead is electrically connected to the circuit board.

[0029] An embodiment of the present application further provides an electrical device, comprising the battery module in any of the aforementioned embodiments.

[0030] In the above-mentioned electrical equipment, the adhesive of the battery module directly connects the main body and the top seal of multiple battery cells through injection molding, and covers at least part of the surface of the circuit board, and covers at least part of the surface of the electrode terminal, so as to protect the battery cells and circuit boards (such as insulation, waterproofing, salt spray corrosion resistance, drop resistance, etc.), which is conducive to simplifying the assembly process of the battery module, improving the assembly efficiency of the battery module, reducing the impact of the assembly process of the battery module on the electrical equipment, and also helping to reduce the number of accessories used to protect the battery cells, improve the energy density of the battery module, and reduce the impact of the energy density of the battery module on the electrical equipment. In addition, the adhesive is directly formed on the surface of the circuit board and multiple battery cells through injection molding, which is also conducive to improving the bonding strength of the adhesive to the circuit board and the shell, reducing the risk of relative movement between the circuit board and the shell, improving the seismic performance of the battery module, and reducing the impact of the seismic performance of the battery module on the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0032] Figure 2 yes Figure 1 Exploded view of the structure shown.

[0033] Figure 3 It is a schematic diagram of the structure of a battery cell in one embodiment of the present application.

[0034] Figure 4 It is a schematic diagram of the structure of a battery cell in one embodiment of the present application.

[0035] Figure 5 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0036] Figure 6 yes Figure 5 Exploded view of the structure shown.

[0037] Figure 7 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0038] Figure 8 yes Figure 7 Exploded view of the structure shown.

[0039] Fig. 9 It is a schematic diagram of the front structure of a battery module in one embodiment of the present application.

[0040] Fig.10 yes Fig. 9 Exploded view of the structure shown.

[0041] Fig.11 It is a schematic diagram of the structure of the protrusion and the structural member in one embodiment of the present application.

[0042] Fig.12 yes Fig. 9 Partial section view along section line AA.

[0043] Fig.13 It is a schematic diagram of the back structure of a battery module in one embodiment of the present application.

[0044] Fig.14 It is a structural schematic diagram of an extension portion in an embodiment of the present application.

[0045] Fig.15 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0046] Fig.16 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0047] Fig.17 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0048] Fig.18 It is a schematic diagram of the structure of the protrusion and the structural member in one embodiment of the present application.

[0049] Fig.19 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0050] Fig. 20 It is a schematic diagram of the structure of the protrusion and the structural member in one embodiment of the present application.

[0051] Fig.21 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0052] Fig. 22 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0053] Fig.23 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0054] Fig.24 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0055] Fig.25 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0056] Fig.26 yes Fig.25 Exploded view of the structure shown.

[0057] Fig. 27 It is a schematic diagram of the structure of a battery module in one embodiment of the present application.

[0058] Fig.28 yes Fig. 27 Exploded view of the structure shown.

[0059] Fig.29 It is a schematic diagram of the structure of an electrical device in an embodiment of the present application.

[0060] Main component symbols

[0061] Circuit board 10

[0062] Substrate 11

[0063] First side 111

[0064] Second side 112

[0065] Electronic components 12

[0066] Battery pack 20A, 20B

[0067] Battery Cell 20

[0068] Housing 21

[0069] Main body 211

[0070] Side 211A

[0071] Curved surface

[0072] Top wall 2112

[0073] First top surface 2112A

[0074] Second top surface 2112B

[0075] First Wall 2113

[0076] Second Wall 2114

[0077] Plane 2115

[0078] Top seal 212

[0079] Side sealing part 213

[0080] Electrode terminal 23

[0081] First electrode terminal 231

[0082] Second electrode terminal 232

[0083] Adhesive 30

[0084] Through hole 30A

[0085] Opening 30B

[0086] Base 31

[0087] The first outer side surface 311

[0088] First positioning hole 312

[0089] Second positioning hole 313

[0090] The second outer side surface 314

[0091] District 1 3141

[0092] District 2 3142

[0093] District 3143

[0094] The third positioning hole 315

[0095] Through hole 32

[0096] Extension 33

[0097] The first end portion 331

[0098] The second end portion 332

[0099] Part 134

[0100] Part 235

[0101] Projection 36

[0102] Mounting hole 361

[0103] Card slot 362

[0104] First mounting surface 363

[0105] First card slot 37

[0106] Second card slot 38

[0107] Carrying part 39

[0108] Structural parts 40

[0109] Flange 41

[0110] The clamping portion 42

[0111] Protrusion 43

[0112] Connection hole 431

[0113] The first covering portion 441

[0114] The second covering portion 442

[0115] Connection part 443 Adapter 45

[0116] Slide 451

[0117] Connecting area 50

[0118] Accommodation space 60

[0119] First adhesive tape 71

[0120] Second adhesive tape 72

[0121] Third adhesive tape 73

[0122] Bracket 74

[0123] Connector 80

[0124] Harness 81

[0125] The first paragraph 811

[0126] Second paragraph 812

[0127] The third paragraph 813

[0128] Connector 82

[0129] Connector 85

[0130] Temperature sensor 90

[0131] Probe 91

[0132] Lead 92

[0133] Electrical equipment 200

[0134] First direction X

[0135] Second direction Y

[0136] The third direction Z

[0137] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0138] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0139] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally disposed element at the same time. When an element is considered to be "disposed on" another element, it may be directly disposed on the other element or there may be a centrally disposed element at the same time. In this application, unless otherwise clearly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, or the two elements may be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0140] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0141] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0142] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. The various embodiments in the present application may be combined with each other in the absence of conflict.

[0143] It should be noted that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation to the present application.

[0144] An embodiment of the present application provides a battery module, including a circuit board, an adhesive and a plurality of battery cells. The plurality of battery cells are arranged along a first direction, each battery cell includes an electrode assembly, a shell and an electrode terminal, the shell includes a main body and a top seal portion connected to each other, the electrode assembly is accommodated in the main body, one end of the electrode terminal is electrically connected to the electrode assembly, and the other end of the electrode terminal extends from the top seal portion, and the first direction is the width direction or length direction of the battery cell. The circuit board connects the electrode terminals of the plurality of battery cells. The adhesive adheres the main body and the top seal of the plurality of battery cells, the adhesive covers at least part of the surface of the circuit board, and the adhesive covers at least part of the surface of the electrode terminal; the adhesive is formed on the surface of the circuit board and the plurality of battery cells by injection molding.

[0145] In the above-mentioned battery module, the adhesive is directly connected to the main body and the top sealing part of multiple battery cells by injection molding, and covers at least part of the surface of the circuit board, and covers at least part of the surface of the electrode terminal, which protects the battery cells and circuit boards (such as insulation, waterproofing, salt spray corrosion protection, drop resistance, etc.), which is conducive to simplifying the assembly process of the battery module and improving assembly efficiency. It is also conducive to reducing the number of accessories used to protect the battery cells and improving the energy density of the battery module. In addition, the adhesive is directly formed on the surface of the circuit board and multiple battery cells by injection molding, which is also conducive to improving the bonding strength of the adhesive to the circuit board and the shell, reducing the risk of relative movement between the circuit board and the shell, and improving the seismic performance of the battery module.

[0146] Compared with the traditional solution of wrapping the battery cell head with adhesive paper, the adhesive of the present application is directly formed on the surface of the circuit board and multiple battery cells through injection molding, so that the circuit board and multiple battery cells form an integrated structure, which improves the overall structural rigidity of the battery module and reduces the risk of deformation of the battery module. At the same time, it reduces the impact of relative movement between different battery cells, between battery cells and circuit boards, and between battery cells and adhesive paper (such as friction noise, friction damage, etc.).

[0147] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0148] like Figures 1 to 4 As shown, an embodiment of the present application provides a battery module 100, including a circuit board 10 and a plurality of battery cells 20. The plurality of battery cells 20 are arranged along a first direction X, each battery cell 20 includes an electrode assembly (not shown), a shell 21 and an electrode terminal 23, the shell 21 includes a main body 211 and a top seal 212 connected to each other, the electrode assembly is accommodated in the main body 211, one end of the electrode terminal 23 is electrically connected to the electrode assembly, and the other end of the electrode terminal 23 extends from the top seal 212, and the first direction X is the width direction or length direction of the battery cell 20. The circuit board 10 is connected to the electrode terminals 23 of the plurality of battery cells 20 and is electrically connected to the plurality of battery cells 20.

[0149] In one embodiment, the battery module 100 also includes an adhesive 30, which bonds the circuit board 10 and the shell 21, and is directly formed on at least part of the surface of the circuit board 10 and at least part of the surface of multiple shells 21 by injection molding, and protects the battery cells 20 and the circuit board 10 (such as insulation, waterproofing, salt spray corrosion resistance, drop resistance, etc.), which is beneficial to simplifying the assembly process of the battery module 100 and improving assembly efficiency. It is also beneficial to increase the bonding strength of the adhesive 30 bonding the circuit board 10 and the shell 21, reduce the risk of relative movement between the circuit board 10 and the shell 21, and between different battery cells 20, and improve the seismic performance of the battery module 100.

[0150] In one embodiment, the adhesive 30 bonds the main body 211 and the top seal 212 of each battery cell 20, which is beneficial to increase the area of ​​the adhesive 30 bonding to the shell 21, further improve the bonding strength between the adhesive 30 and the shell 21, and reduce the risk of relative movement between the circuit board 10 and the shell 21. It is also beneficial to connect the battery cells 20, reduce the risk of relative movement of the battery cells 20, and improve the seismic resistance of the battery module 100.

[0151] In one embodiment, the adhesive 30 also covers at least a portion of the surface of the electrode terminal 23, which is beneficial to improving the stability of the connection between the circuit board 10 and the electrode terminal 23, and reducing the risk of deformation and damage of the electrode terminal 23. At the same time, it can also insulate and protect the electrode terminal 23, which is beneficial to reducing the number of accessories used to protect the battery cell 20, saving the cost of the battery module 100, and improving the energy density of the battery module 100.

[0152] In one embodiment, the adhesive 30 completely covers the circuit board 10, which is beneficial to increase the area of ​​the adhesive 30 bonding the circuit board 10, improve the bonding strength between the adhesive 30 and the circuit board 10, and can protect the circuit board 10, thereby improving the seismic performance of the battery module 100.

[0153] In one embodiment, the adhesive 30 completely covers the electrode terminal 23, which is beneficial to improving the protective effect of the adhesive 30 on the electrode terminal 23, reducing the risk of deformation or damage of the electrode terminal 23, improving the seismic resistance of the electrode terminal 23, and improving the seismic resistance of the battery module 100.

[0154] In one embodiment, the adhesive 30 completely covers the top seal portion 212 , which is beneficial to increase the area of ​​the adhesive 30 adhering to the top seal portion 212 , improve the bonding strength between the adhesive 30 and the shell 21 , and improve the seismic performance of the battery module 100 .

[0155] In one embodiment, the adhesive 30 is formed on the surfaces of the circuit board 10 and the plurality of battery cells 20 by using an injection molding device to melt plastic and then solidify it.

[0156] In one embodiment, the first direction X is the width direction of the battery cell 20 .

[0157] In one embodiment, along the third direction Z, the adhesive 30 does not extend beyond the housing 21, which helps to reduce the effect of the adhesive 30 on the outer shell size of the battery module 100. Optionally, along the third direction Z, the edge of the adhesive 30 is flush with the housing 21. In one embodiment, the third direction Z is the thickness direction of the battery cell 20.

[0158] In one embodiment, when the battery module 100 is connected to an external electrical device, a fastener or a compression member may be used to connect the adhesive member 30 and the external electrical device to fix the battery module 100 to the external electrical device, which helps to reduce the impact of the compression force on the battery cell 20.

[0159] In one embodiment, the adhesive 30 is provided with a through hole 32, and the through hole 32 is configured to be detachably connected to an external electrical device. By passing the fastener through the through hole 32 and connecting the external electrical device, the battery module 100 can be fixed to the external electrical device, and the fastener does not need to act on the battery cell 20, which is conducive to reducing the impact of the fastener on the battery cell 20. At the same time, the fastener is connected to the battery cell 20 and the circuit board 10 through the adhesive 30, which can play a heat conduction role, which is conducive to the heat distribution and heat dissipation of the battery module 100 during the charging and discharging process, and improves the safety and reliability of the battery module.

[0160] In one embodiment, the fastener is a screw.

[0161] In one embodiment, the adhesive member 30 includes a base 31 and a convex portion 36. The base 31 covers at least a portion of the surface of the circuit board 10 and at least a portion of the surface of the electrode terminal 23. The convex portion 36 is connected to the base 31 and extends along the second direction Y, and the through hole 32 passes through the convex portion 36. By providing the convex portion 36 and arranging the through hole 32 in the convex portion 36, it is beneficial to increase the distance between the through hole 32 and the battery cell 20 along the second direction Y, and reduce the influence of the pressure of the fastener on the battery cell 20.

[0162] In one embodiment, the second direction Y is the length direction of the battery cell 20 .

[0163] In one embodiment, along the first direction X, the width of the protrusion 36 is smaller than the width of the base 31. When the battery module 100 is installed on the electrical device 200, the base 31 is located in the battery compartment of the electrical device 200, and the protrusion 36 is located outside the battery compartment of the electrical device 200. By utilizing the space outside the battery compartment of the electrical device 200 to accommodate the protrusion 36, the space occupied by the adhesive 30 in the battery compartment of the electrical device 200 can be reduced, which is beneficial to improving the energy density of the battery module 100.

[0164] In one embodiment, the adhesive member 30 is formed on the surface of the circuit board 10 and the plurality of battery cells 20 by low-pressure injection molding, and the battery module 100 further includes a structural member 40, the adhesive member 30 is bonded to the structural member 40 and covers at least part of the surface of the structural member 40, and the through hole 32 passes through the structural member 40. The adhesive member 30 formed by low-pressure injection molding has a low hardness, and the connection strength between the through hole 32 provided in the protrusion 36 and the fastener is insufficient. By providing the structural member 40, it is beneficial to increase the structural strength of the connection area 50 surrounding the through hole 32 on the battery module 100, so as to reduce the risk of the connection area 50 being crushed by the fastener when the fastener passes through the through hole 32 and connects to the external electrical device, thereby improving the stability and reliability of the battery module 100 in connecting to the external electrical device.

[0165] In one embodiment, the injection pressure of low-pressure injection molding is 1 MPa to 3 MPa to reduce the risk of failure to form due to too low injection pressure and the risk of squeezing and deforming the surfaces of the circuit board 10 and the multiple battery cells 20 due to too high injection pressure.

[0166] Optionally, the injection pressure is 1Mpa, 1.1Mpa, 1.2Mpa, 1.3Mpa, 1.4Mpa, 1.5Mpa, 1.6Mpa, 1.7Mpa, 1.8Mpa, 1.9Mpa, 2Mpa, 2.1Mpa, 2.2Mpa, 2.3Mpa, 2.4Mpa, 2.5Mpa, 2.6Mpa, 2.7Mpa, 2.8Mpa, 2.9Mpa, 3Mpa and any other value in the range of 1Mpa to 3Mpa.

[0167] Furthermore, the injection pressure of the low-pressure injection molding may be 1 MPa to 1.5 MPa, so as to further reduce the risk of the surfaces of the circuit board 10 and the plurality of battery cells 20 being squeezed and deformed due to excessive injection pressure.

[0168] The connection area 50 refers to the area penetrated by the through hole 32. After the fastener passes through the through hole 32, part of the fastener is pressed against the connection area 50, and the connection area 50 bears the fastening pressure of the fastener.

[0169] In one embodiment, the adhesive 30 is a polymer material, which has the characteristics of low density, good mechanical properties, wear resistance, corrosion resistance and electrical insulation, which is conducive to reducing the influence of the weight of the adhesive 30 on the battery module 100, reducing the influence of deformation, damage or corrosion of the adhesive 30 on the battery module 100, and reducing the risk of short circuit of the battery module 100. In one embodiment, the adhesive 30 is a polyamide hot melt adhesive.

[0170] In one embodiment, the thermal conductivity of the adhesive 30 is higher than that of air, which is beneficial to heat dissipation of the circuit board 10 and the battery cell 20 covered by the adhesive 30 and reduces the temperature rise of the circuit board 10 and the battery cell 20 .

[0171] In one embodiment, the structural member 40 is made of metal, which has good structural strength, which is conducive to reducing the risk of the connection area 50 being damaged by the fasteners, and improving the stability and reliability of the battery module 100 connecting to the external electrical equipment. In addition, metal also has good thermal conductivity, which is conducive to transferring the heat of the battery module 100 and improving the heat dissipation effect of the battery module 100.

[0172] In one embodiment, the structural member 40 is made of metal aluminum. Metal aluminum not only has high structural strength, but also has low density and good thermal conductivity, which is beneficial to reducing the impact of the weight of the structural member 40 on the battery module 100 and is beneficial to the heat dissipation of the battery module 100.

[0173] In one embodiment, the structural member 40 is made of at least one of polyoxymethylene and polycarbonate, which is beneficial to improving the structural strength of the structural member 40 and reducing the weight of the structural member 40 .

[0174] In one embodiment, the thickness of the structural member 40 is 0.1 mm to 5 mm, which is beneficial to both improving the structural strength of the connection area 50 and reducing the influence of its weight and volume on the battery module 100. Optionally, the thickness of the structural member 40 is 0.18 mm to 0.22 mm, which is beneficial to both improving the structural strength of the connection area 50 and reducing the influence of the weight and volume of the structural member 40 on the battery module 100.

[0175] Optionally, the thickness of the structural member 40 is 0.1 mm, 0.15 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.25 mm, 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm and any other value in the range of 0.1 mm to 5 mm.

[0176] In one embodiment, the adhesive 30 completely covers the structural member 40, which is beneficial to improve the bonding strength between the structural member 40 and the adhesive 30 and reduce the risk of the structural member 40 falling off. In one embodiment, the structural member 40 is pre-embedded in the adhesive 30 by injection molding equipment.

[0177] In one embodiment, the through hole 32 passes through the circuit board 10 (not shown), which is beneficial to increase the structural strength of the connection area 50, so as to reduce the risk of the connection area 50 being damaged by the fastener when the fastener passes through the through hole 32 and connects to the external electrical equipment, thereby improving the stability and reliability of the battery module 100 in connecting to the external electrical equipment.

[0178] As an example, the battery module 100 includes a structural member 40 , and the through hole 32 penetrates the structural member 40 , which is further described below.

[0179] In one embodiment, the housing 21 further includes a side sealing portion 213 , which is connected to the main body 211 and is located at an end of the main body 211 along the first direction X.

[0180] In one embodiment, the electrode terminal 23 includes a first electrode terminal 231 and a second electrode terminal 232 . The first electrode terminal 231 and the second electrode terminal 232 have opposite polarities. One of the first electrode terminal 231 and the second electrode terminal 232 is a positive terminal, and the other is a negative terminal.

[0181] In one embodiment, the first electrode terminal 231 and the second electrode terminal 232 are located at the same end of the main body 211 along the second direction Y. In one embodiment, the first electrode terminal 231 and the second electrode terminal 232 are located at two ends of the main body 211 along the second direction Y (not shown).

[0182] As an example, the first electrode terminal 231 and the second electrode terminal 232 are located at the same end of the main body 211 along the second direction Y as an example for further description.

[0183] In one embodiment, the electrode terminals 23 of the plurality of battery cells 20 are connected to the circuit board 10 , so that different battery cells 20 are electrically connected.

[0184] In one embodiment, along the first direction X, a receiving space 60 is formed between two adjacent main body portions 211 .

[0185] In one embodiment, the adhesive member 30 includes an extension portion 33, which is connected to the base portion 31. At least a portion of the extension portion 33 is located in the accommodating space 60 and is bonded to two adjacent main portions 211, which is beneficial to increasing the bonding area between the adhesive member 30 and the battery cell 20 and improving the bonding strength between the adhesive member 30 and the battery cell 20. At the same time, the extension portion 33 is arranged in the accommodating space 60 between the two main portions 211, which is beneficial to reducing the influence of the extension portion 33 on the outer volume of the battery module 100, thereby reducing the influence of the outer volume of the battery module 100 on external electrical equipment.

[0186] In one embodiment, the main body 211 includes a curved surface portion 2111 , which is located at an end of the main body 211 along the first direction X. In two battery cells 20 adjacent to each other along the first direction X, the curved surfaces 2111 of the two main bodies 211 face each other, and the gap between the two curved surfaces 2111 forms a receiving space 60 .

[0187] In one embodiment, the battery module 100 further includes a first adhesive tape 71, and the first adhesive tape 71 adheres to the ends of the plurality of main bodies 211 away from the top seal 212. The first adhesive tape 71 protects the ends of the main bodies 211 away from the top seal 212, which is beneficial to reducing the risk of damage to the shell 21 and improving the safety performance of the battery module 100. At the same time, by adhering the plurality of main bodies 211 with the first adhesive tape 71, it is also beneficial to improve the connection stability between different battery cells 20, reduce the risk of relative movement between different battery cells 20, and improve the anti-seismic performance of the battery module 100.

[0188] In one embodiment, the battery module 100 further includes a connector 80, which is connected to the circuit board 10. The connector 80 can be used to connect an external electrical device, so that the battery module 100 and the external electrical device are electrically connected. In one embodiment, the connector 80 includes a wiring harness.

[0189] In one embodiment, the battery module 100 also includes a second adhesive tape 72, which bonds the connecting member 80 and the main body 211. The second adhesive tape 72 limits the connecting member 80, which helps to reduce the risk of movement of the connecting member 80 and reduce the impact of the movement of the connecting member 80 on the battery module 100.

[0190] In one embodiment, the battery module 100 further includes a temperature sensor 90 , which is in contact with the main body 211 and electrically connected to the circuit board 10 . The temperature sensor 90 is used to detect the temperature of the battery cell 20 , which is beneficial to improving the monitoring of the battery module 100 .

[0191] In one embodiment, the battery module 100 also includes a third adhesive tape 73, which bonds the temperature sensor 90 and the main body 211. The third adhesive tape 73 limits the temperature sensor 90, which helps to reduce the risk of movement of the temperature sensor 90 and reduce the impact of the movement of the temperature sensor 90 on temperature collection.

[0192] like Figure 5 and Figure 6 As shown, in one embodiment, the battery module 100 further includes a bracket 74, the bracket 74 is connected to the adhesive 30, and the bracket 74 is configured to connect to an external electrical device so that the battery module 100 is fixed to the external electrical device. The bracket 74 fixes the battery module 100 through the adhesive 30, which is conducive to reducing the influence of stress on the battery cell 20 and improving the safety performance of the battery module 100.

[0193] In one embodiment, the bracket 74 is fixedly connected to the external electrical device via fasteners, which helps to improve the stability and reliability of the bracket 74 in fixing the battery module 100 and reduce the risk of relative movement of the battery module 100 relative to the external electrical device.

[0194] It is understandable that in the embodiment where the battery module 100 is fixed by the bracket 74, the adhesive 30 does not need to be provided with the through hole 32 or the protrusion 36, which is beneficial to reduce the outer volume of the adhesive 30 and reduce the impact of the adhesive 30 on the space inside the external electrical equipment.

[0195] In one embodiment, the bracket 74 is a sheet metal structure, which is convenient for processing and manufacturing, saves the cost of the bracket 74 , and is also convenient for increasing the structural strength of the bracket 74 and improving the stability of fixing the battery module 100 .

[0196] In one embodiment, the bracket 74 is made of plastic, which is helpful to reduce its own weight and reduce the impact of its weight on the battery module 100. In one embodiment, the bracket 74 is formed by melting plastic and then solidifying it through injection molding equipment, which is helpful to simplify the processing and manufacturing process of the bracket 74, improve its manufacturing efficiency, and save its manufacturing cost.

[0197] like Figure 7 and Figure 8 As shown, in one embodiment, the adhesive 30 also includes a first part 34, which covers the ends of multiple main bodies 211 away from the top sealing part 212, which is beneficial to protecting the ends of the main bodies 211 away from the top sealing part 212, reducing the risk of damage to the shell 21, and improving the safety performance of the battery module 100. At the same time, it is also beneficial to improve the connection stability between different battery cells 20 and reduce the risk of relative movement between different battery cells 20.

[0198] In one embodiment, the first portion 34 is connected to the extension portion 33 , which is beneficial to improving the overall strength of the adhesive 30 , improving the stability of the adhesive 30 connecting different battery cells 20 , and further improving the anti-seismic performance of the battery module 100 .

[0199] In one embodiment, the adhesive 30 also includes a second part 35, which is connected to the base 31 and adhered to the side sealing portion 213 of the battery cell 20 located on the outside along the first direction X, which is beneficial to protecting the side sealing portion 213 of the battery cell 20 located on the outside, reducing the risk of damage to the battery cell 20 located on the outside, and is also beneficial to increasing the bonding area between the adhesive 30 and the shell 21, improving the bonding strength between the adhesive 30 and the shell 21, and improving the seismic resistance of the battery module 100.

[0200] In one embodiment, the first portion 34 is connected to the second portion 35 , which is beneficial to further improve the overall strength of the adhesive 30 , improve the stability of the adhesive 30 connecting different battery cells 20 , and further improve the anti-seismic performance of the battery module 100 .

[0201] In one embodiment, there are multiple protrusions 36, some of which are arranged on the base 31 and arranged along the first direction X. Each protrusion 36 is provided with a through hole 32, and the battery module 100 can be fixed at multiple locations by multiple fasteners, which is beneficial to improve the stability of the battery module 100 fixedly connected to the external electrical equipment.

[0202] In one embodiment, a portion of the protrusion 36 is provided on the first portion 34, and the protrusion 36 and the external electrical equipment are connected by a plurality of fasteners, so that the two ends of the battery module 100 along the second direction Y can be fixed, which is beneficial to improving the stability of the battery module 100 fixedly connected to the external electrical equipment.

[0203] In one embodiment, part of the protrusion 36 is disposed on the second part 35, and the protrusion 36 and the external electrical equipment are connected by multiple fasteners, which can also fix the end of the battery module 100 along the first direction X, which is beneficial to improving the stability of the battery module 100 fixedly connected to the external electrical equipment.

[0204] In one embodiment, there are multiple structural members 40, and at least one protrusion 36 is provided with a structural member 40, which is beneficial to improve the connection strength between the connection area 50 and the fastener, reduce the risk of the connection area 50 being crushed, and improve the stability of the battery module 100 connecting to external electrical equipment. Optionally, each protrusion 36 is provided with a structural member 40.

[0205] In one embodiment, the adhesive member 30 is provided with a first slot 37, and the first slot 37 is provided in the second portion 35. Part of the connector 80 is located in the first slot 37, which is beneficial to limit the movement of the connector 80 and reduce the impact of the movement of the connector 80 on the battery module 100 and external electrical equipment. At the same time, it is also beneficial to reduce the number of accessories used to limit the connector 80 and save the cost of the battery module 100.

[0206] In one embodiment, the adhesive 30 is provided with a second slot 38, and part of the temperature sensor 90 is located in the second slot 38, which is beneficial to limit the movement of the temperature sensor 90 and reduce the impact of the movement of the temperature sensor 90 on the battery module 100 and external electrical equipment. At the same time, it is also beneficial to reduce the number of accessories used to limit the temperature sensor 90 and save the cost of the battery module 100.

[0207] like Fig. 9 and Fig.10 As shown, an embodiment of the present application provides a battery module 100A, and the difference between the battery module 100A and the battery module 100 lies in the structure of the adhesive component 30 and the structure of the structural component 40.

[0208] In one embodiment, the adhesive member 30 includes a base 31, an extension 33, a first portion 34, and a second portion 35. The base 31 covers at least a portion of the surface of the circuit board 10, and covers at least a portion of the surface of the electrode terminal 23. At least a portion of the extension 33 is located in the accommodating space 60 and is bonded to two adjacent main bodies 211. The first portion 34 covers the ends of the plurality of main bodies 211 away from the top seal 212. The second portion 35 is connected to the base 31 and is bonded to the side seal 213 of the battery cell 20 located on the outside along the first direction X, and the second portion 35 is also connected to the first portion 34. The overall structure composed of the base 31, the extension 33, the first portion 34, and the second portion 35 can position and protect the peripheral side of each battery cell 20, which is conducive to improving the structural stability of the battery module 100A, and thus improving the seismic performance of the battery module 100A.

[0209] In one embodiment, the protrusion 36 is connected to at least one of the base 31, the first part 34 and the second part 35, and the protrusion 36 extends in a direction away from the main body 211 to facilitate the protrusion 36 to adapt to interfaces at different positions of external electrical equipment.

[0210] like Fig. 9 and Fig.11 As shown, in one embodiment, the adhesive member 30 includes a protrusion 36, the protrusion 36 is provided with a mounting hole 361, and the hole wall of the mounting hole 361 is provided with a card slot 362. The battery module 100A also includes a structural member 40, and the outer peripheral surface of the structural member 40 is provided with a flange 41, and the flange 41 is snapped into the card slot 362. The portion of the structural member 40 exposed in the mounting hole 361 is provided with a through hole 32, and the through hole 32 is configured to be detachably connected to an external electrical device. Specifically, the adhesive member 30 is formed by injection molding, potting, dispensing, and spraying. The structural member 40 is pre-embedded in the adhesive member 30, and the flange 41 cooperates with the card slot 362 to improve the connection strength between the structural member 40 and the protrusion 36, so as to reduce the risk of the structural member 40 being offset relative to the protrusion 36. When the fastener passes through the through hole 32 and is connected to an external electrical device, the structural member 40 contacts the fastener, which can reduce the risk of the adhesive member 30 being crushed by the fastener and improve the stability and reliability of the battery module 100A connecting to the external electrical device.

[0211] The structural member 40 is provided with one or more through holes 32 to facilitate adaption to the interface of an external electrical device. Optionally, one structural member 40 is provided with two through holes 32 .

[0212] like Fig. 9 and Fig.12As shown, in one embodiment, the main body 211 includes a top wall 2112 and a first wall 2113 and a second wall 2114 located on both sides of the top wall 2112 along the third direction Z. The top seal portion 212 extends outward from the top wall 2112 along the second direction Y. The top wall 2112 includes a first top surface 2112A and a second top surface 2112B, the first top surface 2112A is located between the top seal portion 212 and the first wall 2113, and the second top surface 2112B is located between the top seal portion 212 and the second wall 2114. The circuit board 10 is disposed on the first top surfaces 2112A of the plurality of battery cells 20, and the circuit board 10 is disposed opposite to the top seal portion 212 along the third direction Z. The base 31 covers the first top surface 2112A, the second top surface 2112B, the top seal portion 212, the electrode terminal 23 and the circuit board 10.

[0213] like Fig.10 and Fig.11 As shown, in one embodiment, the circuit board 10 includes a substrate 11 and an electronic component 12, and the substrate 11 includes a first surface 111 and a second surface 112 arranged opposite to each other along a third direction Z, the first surface 111 is away from the top seal portion 212, and the second surface 112 is toward the top seal portion 212. The electronic component 12 is connected to the second surface 112. The electronic component 12 includes a connecting piece connected to the electrode terminal 23, and the connecting piece is arranged on the second surface 112, which is conducive to shortening the connection path between the electrode terminal 23 and the circuit board 10. In one embodiment, the electronic component 12 also includes at least one of a current sensing resistor, a resistor for detecting battery temperature, a transistor for controlling the disconnection of the battery charge / discharge circuit, a transient suppression diode for port surge protection, and a protection chip for realizing battery overvoltage, undervoltage, and overcurrent fault detection.

[0214] In one embodiment, the base 31 includes a first outer side surface 311, and the first outer side surface 311 covers the first surface 111. The first outer side surface 311 is provided with a plurality of first positioning holes 312 and a plurality of second positioning holes 313, and a portion of the first surface 111 is exposed in the first positioning holes 312 and the second positioning holes 313. The plurality of first positioning holes 312 are arranged at intervals along the first direction X, and the second positioning holes 313 are distributed on both sides of each first positioning hole 312. The first positioning holes 312 and the second positioning holes 313 are used to pass the positioning pins during the formation of the adhesive 30, so as to define the position of the circuit board 10 in the base 31, thereby reducing the risk of the circuit board 10 being skewed and misplaced. In addition, the plurality of first positioning holes 312 are arranged at intervals, which is conducive to providing a space for releasing the stress on the base 31 and improving the stability of the structure of the base 31.

[0215] like Fig.12 and Fig.13As shown, in one embodiment, the base 31 also includes a second outer side surface 314, and the second outer side surface 314 covers the second surface 112. The second outer side surface 314 is provided with a plurality of third positioning holes 315, and part of the second surface 112 is exposed in the third positioning holes 315. Observed along the third direction Z, the third positioning holes 315 are spaced apart from the electronic component 12, and each third positioning hole 315 overlaps with a first positioning hole 312. The third positioning holes 315 are used to pass the positioning pins during the formation of the adhesive 30, so as to limit the position of the circuit board 10 in the base 31, thereby reducing the risk of the circuit board 10 being skewed and misplaced. In addition, the plurality of third positioning holes 315 are spaced apart, which is conducive to providing a space for releasing the stress on the base 31 and improving the stability of the structure of the base 31.

[0216] In one embodiment, the second outer side surface 314 includes a first area 3141, a second area 3142 and a third area 3143. Along the third direction Z, the circuit board 10 overlaps with the first area 3141. Along the third direction Z, the second top surface 2112B overlaps with the second area 3142. The third area 3143 is connected to the first area 3141 and the second area 3142, and along the second direction Y, the third area 3143 is arranged opposite to the second top surfaces 2112B of the plurality of battery cells 20. Along the third direction Z, the distance between the first area 3141 and the first wall 2113 is D1, and the distance between the second area 3142 and the first wall 2113 is D2, D1 is less than D2, and the difference between D1 and D2 is 0.5 mm to 3 mm. The first area 3141 , the second area 3142 and the third area 3143 form a stepped surface, so that the second outer side surface 314 can overlap with the external electrical equipment, which is beneficial to improving the stability and reliability of the battery module 100A in connecting with the external electrical equipment.

[0217] like Fig.10 As shown, in one embodiment, the main body 211 includes a side surface 211A, and the side sealing portion 213 is connected to the side surface 211A, and the side surface 211A includes a curved surface portion 2111 and a flat surface portion 2115. The side sealing portion 213 is bent toward the flat surface portion 2115, and the side sealing portions 213 of two adjacent main bodies 211 abut against each other. The curved surface portions 2111 of two adjacent main bodies 211 face each other and form a receiving space 60. The adhesive 30 is also filled in the receiving space 60 and adheres to the two adjacent main bodies 211, which is conducive to increasing the bonding area between the adhesive 30 and the battery cell 20 and improving the bonding strength between the adhesive 30 and the battery cell 20. At the same time, the extension portion 33 is arranged in the receiving space 60 between the two main bodies 211, which is conducive to reducing the influence of the extension portion 33 on the outer volume of the battery module 100A, thereby reducing the influence of the outer volume of the battery module 100A on the external electrical equipment.

[0218] like Fig.14As shown, in one embodiment, the extension portion 33 includes a first end 331 and a second end 332 . Along the third direction Z, the first end 331 is adjacent to the first wall 2113 , and the second end 332 is adjacent to the second wall 2114 .

[0219] In one embodiment, the first end portion 331 extends along the first direction X to two first walls 2113 adjacent to the accommodating space 60 and bonds to two adjacent main body portions 211 so as to increase the bonding area between the adhesive 30 and the battery cell 20 and improve the bonding strength between the adhesive 30 and the battery cell 20.

[0220] In one embodiment, the second end portion 332 extends along the first direction X to two second walls 2114 adjacent to the accommodating space 60 and bonds to two adjacent main body portions 211 to increase the bonding area between the adhesive 30 and the battery cell 20 and improve the bonding strength between the adhesive 30 and the battery cell 20 .

[0221] In one embodiment, along the first direction X, the length of the overlapping portion between each first end portion 331 and the first wall 2113 of a battery cell 20 is 5 mm to 10 mm, so as to improve the bonding strength between the adhesive 30 and the battery cell 20, and is beneficial to reduce the space waste caused by the excessive length of the first end portion 331, thereby improving the energy density of the battery module 100A.

[0222] Optionally, the length of the overlapping portion between each first end portion 331 and the first wall 2113 of a battery cell 20 is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or any other value within the range of 5 mm to 10 mm.

[0223] In one embodiment, along the first direction X, the length of the overlapping portion between each second end portion 332 and the second wall 2114 of a battery cell 20 is 5 mm to 10 mm, which improves the bonding strength between the adhesive 30 and the battery cell 20, and helps to reduce the space waste caused by the excessive length of the second end portion 332, thereby improving the energy density of the battery module 100A.

[0224] Optionally, the length of the overlapping portion between each second end portion 332 and the second wall 2114 of a battery cell 20 is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or any other value within the range of 5 mm to 10 mm.

[0225] like Fig.14 As shown, in one embodiment, along the third direction Z, the thickness of the extension portion 33 covering the first wall 2113 is 0.2 mm to 2 mm, so as to improve the bonding strength between the adhesive 30 and the battery cell 20, and is beneficial to reduce the space waste caused by the excessive thickness of the extension portion 33, thereby improving the energy density of the battery module 100A.

[0226] Optionally, the thickness of the extension portion 33 covering the first wall 2113 is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm and any other value in the range of 0.2mm to 2mm.

[0227] In one embodiment, along the third direction Z, the thickness of the extension portion 33 covering the second wall 2114 is 0.2 mm to 2 mm, so as to improve the bonding strength between the adhesive 30 and the battery cell 20, and is beneficial to reduce the space waste caused by the excessive thickness of the extension portion 33, thereby improving the energy density of the battery module 100A.

[0228] Optionally, the thickness of the extension portion 33 covering the second wall 2114 is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm and any other value in the range of 0.2mm to 2mm.

[0229] like Fig.15 As shown, in one embodiment, the first end portion 331 covers the first walls 2113 of multiple battery cells 20, so that the adhesive 30 can position and protect the first wall 2113 of each battery cell 20, which is beneficial to improving the structural stability of the battery module 100A and further improving the seismic resistance of the battery module 100A.

[0230] In one embodiment, the second end portion 332 covers the second wall 2114 of multiple battery cells 20 so that the adhesive 30 can position and protect the second wall 2114 of each battery cell 20, which is beneficial to improving the structural stability of the battery module 100A and further improving the seismic performance of the battery module 100A.

[0231] like Fig. 9 and Fig.10As shown, in one embodiment, the battery module 100A further includes a connector 80, one end of which is electrically connected to the circuit board 10, and the other end of the connector 80 is configured to be electrically connected to an external electrical device. The adhesive 30 covers the connector 80, and the adhesive 30 is provided with a through hole 30A extending along the second direction Y. The connector 80 is at least partially located in the through hole 30A. When viewed along the second direction Y, the hole wall of the through hole 30A abuts against the outer peripheral side of the connector 80, which is conducive to limiting the movement of the connector 80 and reducing the impact of the movement of the connector 80 on the battery module 100A and the external electrical device. At the same time, it is also conducive to reducing the number of accessories used to limit the connector 80 and saving the cost of the battery module 100A. Specifically, the connector 80 is pre-buried in the adhesive 30 so that the hole wall of the through hole 30A abuts against the outer peripheral side of the connector 80.

[0232] In one embodiment, the adhesive member 30 is provided with a plurality of openings 30B connected to the through holes 30A, and a portion of the connector 80 is exposed from the openings 30B. The plurality of openings 30B are arranged at intervals, which is conducive to providing a space for releasing the stress of the portion where the adhesive member 30 covers the connector 80, thereby improving the structural stability of the portion where the adhesive member 30 covers the connector 80.

[0233] In one embodiment, the connector 80 includes a wiring harness 81 and a connector 82. The wiring harness 81 includes a first section 811, a second section 812, and a third section 813. Along the second direction Y, the second section 812 is located on the side of the base 31 away from the battery cell 20, one end of the second section 812 is electrically connected to the circuit board 10, and the other end of the second section 812 is connected to the first section 811. The first section 811 extends from the end of the main body 211 close to the top seal 212 to the end of the main body 211 away from the top seal 212, the second part 35 covers the first section 811, that is, the second part 35 is provided with a through hole 30A, and the first section 811 is at least partially located in the through hole 30A to limit the movement of the first section 811 and the second section 812. One end of the third section 813 is connected to the connector 82, and the connector 82 is configured to be electrically connected to an external electrical device, and the other end of the third section 813 is connected to the first section 811. The third section 813 is located outside the adhesive member 30 , that is, the adhesive member 30 does not cover the third section 813 . The third section 813 can move relative to the first section 811 to facilitate connection with external electrical equipment.

[0234] In one embodiment, the adhesive member 30 further includes a bearing portion 39, the bearing portion 39 is connected to the first portion 34, and the bearing portion 39 is provided with a second slot 38. The temperature sensor 90 includes a probe 91 and a lead 92. The probe 91 is disposed in the second slot 38 and adjacent to the main body 211 to sense the temperature of the main body 211. One end of the lead 92 is electrically connected to the probe 91, and the other end of the lead 92 is electrically connected to the circuit board 10.

[0235] Optionally, the lead wire 92 passes through the through hole 30A to restrict the movement of the lead wire 92 .

[0236] like Fig.16 As shown, the first section 811 is located between two adjacent battery cells 20, and the extension portion 33 covers the first section 811, that is, the extension portion 33 is provided along the through hole 30A, and the first section 811 is at least partially located in the through hole 30A to limit the movement of the first section 811 and the second section 812.

[0237] like Fig.17 and Fig.18 As shown, an embodiment of the present application provides a battery module 100B, and the difference between the battery module 100B and the battery module 100A lies in the structure of the structural member 40.

[0238] In one embodiment, the adhesive member 30 includes a convex portion 36, and the convex portion 36 includes a first mounting surface 363 away from the main body 211. Optionally, the first mounting surface 363 is a plane. The battery module 100B also includes a structural member 40, and the structural member 40 includes a clamping portion 42 and a protruding portion 43 connected along the first arrangement direction. Observed along the first arrangement direction, the circumferential side of the protruding portion 43 does not exceed the circumferential side of the clamping portion 42. The portion of the protruding portion 43 close to the clamping portion 42 is provided with a connecting hole 431, the clamping portion 42 and the connecting hole 431 are located in the convex portion 36, and the adhesive member 30 is also filled in the connecting hole 431, and the protruding portion 43 extends from the first mounting surface 363. The portion where the protruding portion 43 extends from the first mounting surface 363 is configured to be detachably connected to an external electrical device. Specifically, the adhesive member 30 is formed by injection molding, potting, dispensing, and spraying. The parts of the clamping part 42 and the protruding part 43 where the connection hole 431 is provided are pre-buried in the adhesive member 30, and the adhesive member 30 is filled in the connection hole 431, which can improve the connection strength between the structural member 40 and the protruding part 36 to reduce the risk of the structural member 40 being offset relative to the protruding part 36. When the external electrical device is connected through the protruding part 43, the structural member 40 contacts the external electrical device, which can reduce the risk of damage to the adhesive member 30 and improve the stability and reliability of the battery module 100B connecting to the external electrical device.

[0239] Optionally, the protruding portion 43 is snap-connected to an external electrical device.

[0240] like Fig.19 and Fig. 20 As shown, in one embodiment, a through hole 32 is provided at the portion where the protruding portion 43 protrudes from the first mounting surface 363, and the through hole 32 is configured to be detachably connected to an external electrical device. When a fastener passes through the through hole 32 and connects to the external electrical device, the structural member 40 contacts the fastener, which can reduce the risk of the adhesive member 30 being crushed by the fastener, and improve the stability and reliability of the battery module 100B connecting to the external electrical device.

[0241] Furthermore, the arithmetic mean deviation Ra of the contour of the outer surface of the clamping portion 42 satisfies: 12.5μm≤Ra≤50μm; the maximum height Rz of the contour of the outer surface of the clamping portion 42 satisfies: Rz≤3.2μm. Among them, Ra (average arithmetic deviation of the contour) refers to the average value of the absolute value of the distance between the contour centerline of each point on the measured actual contour within the sampling length. Rz (average height) is the sum of the average distances from five high points and five low points on the measured contour from any line parallel to the centerline within the basic measurement length range. By limiting the roughness of the outer surface of the clamping portion 42, the connection strength between the clamping portion 42 and the protrusion 36 is improved.

[0242] Optionally, Ra is 12.5 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm and any other value in the range of 12.5 μm≤Ra≤50 μm. Rz is 1 μm, 2 μm, 3 μm, 3.1 μm, 3.2 μm and any other value in the range of Rz≤3.2 μm.

[0243] An embodiment of the present application provides a battery module 100C. The difference between the battery module 100C and the battery module 100A is that the connector 80 is replaced by a plug-in component 85.

[0244] like Fig.21 As shown, in one embodiment, the battery module 100C includes a connector 85, which is connected to a side of the circuit board 10 away from the main body 211, and the connector 85 is exposed from the base 31, and the connector 85 is configured to be electrically connected to an external electrical device. Optionally, a portion of the connector 85 exposed from the base 31 is provided with a gold finger, and a gold finger is provided at the end, and the circuit connection between the connector 85 and the external electrical device is achieved by inserting the gold finger into the gold finger slot of the external electrical device.

[0245] like Fig. 22 As shown, an embodiment of the present application provides a battery module 100D. The difference between the battery module 100D and the battery module 100B lies in the connection method of the structural member 40 and the adhesive member 30.

[0246] In one embodiment, the battery module 100D includes a structural member 40, which is bonded to the outer surface of the adhesive member 30, and the structural member 40 is configured to be detachably connected to an external electrical device. Specifically, the structural member 40 is bonded to the adhesive member 30 to reduce the risk of the structural member 40 being offset relative to the protrusion 36, and the structural member 40 does not need to be pre-embedded in the adhesive member 30, which is conducive to simplifying the assembly process of the battery module 100D and improving the assembly efficiency. When the external electrical device is connected through the structural member 40, the structural member 40 contacts the external electrical device, which can reduce the risk of damage to the adhesive member 30 and improve the stability and reliability of the battery module 100D connecting to the external electrical device.

[0247] Optionally, the structural member 40 is snap-connected to an external electrical device, or the structural member 40 is provided with a through hole 32 , and a fastener passes through the through hole 32 to connect to the external electrical device.

[0248] In one embodiment, the tensile strength of the outer surfaces of the structural member 40 and the adhesive member 30 is 2 MPa to 20 MPa, and the shear strength of the outer surfaces of the structural member 40 and the adhesive member 30 is 4 MPa to 30 MPa, so as to improve the connection strength between the structural member 40 and the adhesive member 30 .

[0249] The structural member 40 includes a clamping portion 42 and a protruding portion 43 connected along the first arrangement direction. When viewed along the first arrangement direction, the circumferential side of the protruding portion 43 does not exceed the circumferential side of the clamping portion 42. Along the first arrangement direction, the outer surface of the clamping portion 42 facing away from the protruding portion 43 is bonded to the outer surface of the adhesive member 30, which is beneficial to increase the bonding area between the adhesive member 30 and the structural member 40, and improve the connection strength between the adhesive member 30 and the structural member 40.

[0250] like Fig.23 As shown, an embodiment of the present application provides a battery module 100E, and the difference between the battery module 100E and the battery module 100A lies in the structure of the structural member 40.

[0251] In one embodiment, the battery module 100E includes an adapter 45 and a structural member 40, the adhesive member 30 is connected to the adapter 45, the portion of the adapter 45 exposed from the adhesive member 30 is provided with a slide rail 451, and the structural member 40 is provided with a slide groove and is slidably connected to the slide rail 451. The structural member 40 is configured to be detachably connected to an external electrical device. Specifically, the adhesive member 30 is formed by injection molding, potting, dispensing, and spraying. The portion of the adapter 45 where the slide rail 451 is not provided is pre-buried in the adhesive member 30, which can improve the connection strength between the adapter 45 and the adhesive member 30. By adjusting the position of the structural member 40 on the slide rail 451, so as to facilitate the adaptation of the interface of the structural member 40 to different positions of the external electrical device, it is beneficial to improve the versatility of the battery module 100E and reduce the production cost.

[0252] Optionally, the structural member 40 is snap-connected to an external electrical device, or the structural member 40 is provided with a through hole 32 , and a fastener passes through the through hole 32 to connect to the external electrical device.

[0253] like Fig.24 As shown, an embodiment of the present application provides a battery module 100F, and the difference between the battery module 100F and the battery module 100A lies in the structure of the structural member 40.

[0254] In one embodiment, the battery module 100F includes a structural member 40, and the structural member 40 is in a cover shape. The structural member 40 covers the circuit board 10, the adhesive 30 and the plurality of battery cells 20, and the structural member 40 is configured to be detachably connected to an external electrical device. Specifically, the structural member 40 includes a first covering portion 441, two second covering portions 442 and two connecting portions 443. The first covering portion 441 covers the circuit board 10, the adhesive 30 and the plurality of battery cells 20 along a third direction Z. The two second covering portions 442 are connected to both ends of the first covering portion 441 along a first direction X, and each second covering portion 442 is arranged to fit a second portion 35 along the first direction X. Each connecting portion 443 extends outward from one end of a second portion 35 away from the first covering portion 441, and is configured to be detachably connected to an external electrical device. The structural member 40 can protect the circuit board 10 , the adhesive member 30 and the plurality of battery cells 20 , which is beneficial to improving the structural stability of the battery module 100F, and further improving the anti-seismic performance of the battery module 100F.

[0255] Optionally, the connection portion 443 is snap-connected to an external electrical device, or the connection portion 443 is provided with a through hole 32 , and a fastener passes through the through hole 32 to connect to the external electrical device.

[0256] like Fig.25 and Fig.26 As shown, an embodiment of the present application provides a battery module 100G, and the difference between the battery module 100G and the battery module 100 lies in the arrangement of the battery cells.

[0257] In one embodiment, the battery module 100G includes two or more battery cell groups 20A, each battery cell group 20A includes two battery cells 20 stacked along the third direction Z. At least one battery cell group 20A is provided on both sides of the circuit board 10, and the top seal portion 212 of each battery cell 20 faces the circuit board 10, and the circuit board 10 is connected to the electrode terminals 23 of the multiple battery cells. The adhesive 30 adheres to the main body 211 and the top seal portion 212 of the multiple battery cells, which is conducive to increasing the area of ​​the adhesive 30 adhering to the shell 21, further improving the bonding strength between the adhesive 30 and the shell 21, reducing the risk of relative movement between the circuit board 10 and the shell 21, and also facilitating the connection of each battery cell 20, reducing the risk of relative movement of each battery cell 20, and improving the anti-seismic performance of the battery module 100G. The adhesive 30 covers at least part of the surface of the circuit board 10, which is conducive to protecting the circuit board 10 and improving the anti-seismic performance of the battery module 100G. The adhesive 30 covers at least part of the surface of the electrode terminal 23, which is beneficial to improving the stability of the connection between the circuit board 10 and the electrode terminal 23 and reducing the risk of deformation and damage of the electrode terminal 23. At the same time, it can also insulate and protect the electrode terminal 23, which is beneficial to reducing the number of accessories used to protect the battery cell 20, saving the cost of the battery module 100G, and improving the energy density of the battery module 100G.

[0258] like Fig. 27 and Fig.28 As shown, an embodiment of the present application provides a battery module 100H, and the difference between the battery module 100H and the battery module 100 lies in the arrangement of the battery cells.

[0259] In one embodiment, the battery module 100H includes two or more battery cell groups 20B, each battery cell group 20B includes two battery cells 20 stacked along the first direction X. At least one battery cell group 20A is provided on both sides of the circuit board 10, and the top seal portion 212 of each battery cell 20 faces the circuit board 10, and the circuit board 10 is connected to the electrode terminals 23 of the multiple battery cells. The adhesive 30 adheres to the main body 211 and the top seal portion 212 of the multiple battery cells, which is conducive to increasing the area of ​​the adhesive 30 adhering to the shell 21, further improving the bonding strength between the adhesive 30 and the shell 21, reducing the risk of relative movement between the circuit board 10 and the shell 21, and also facilitating the connection of each battery cell 20, reducing the risk of relative movement of each battery cell 20, and improving the anti-seismic performance of the battery module 100H. The adhesive 30 covers at least part of the surface of the circuit board 10, which is conducive to protecting the circuit board 10 and improving the anti-seismic performance of the battery module 100H. The adhesive 30 covers at least part of the surface of the electrode terminal 23, which is beneficial to improving the stability of the connection between the circuit board 10 and the electrode terminal 23 and reducing the risk of deformation and damage of the electrode terminal 23. At the same time, it can also insulate and protect the electrode terminal 23, which is beneficial to reducing the number of accessories used to protect the battery cell 20, saving the cost of the battery module 100H, and improving the energy density of the battery module 100H.

[0260] In summary, in the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) of the present application, the adhesive 30 is connected to the main body 211 and the top seal 212 by injection molding, and covers at least part of the surface of the circuit board 10, and covers at least part of the surface of the electrode terminal 23, which is conducive to simplifying the assembly process of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H), improving the assembly efficiency, and also helping to reduce the amount of protective material used to protect the battery cell 20. The number of accessories is increased, the energy density of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) is improved, and the adhesive 30 is formed on the surface of the circuit board 10 and the plurality of battery cells 20 by injection molding, which is also beneficial to improving the bonding strength of the adhesive 30 bonding the circuit board 10 and the shell 21, reducing the risk of relative movement between the circuit board 10 and the shell 21, and improving the seismic resistance of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H).

[0261] like Fig.29 As shown, an embodiment of the present application further provides an electrical device 200, comprising the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) in any one of the aforementioned embodiments.

[0262] In the above-mentioned electrical equipment 200, the adhesive member 30 of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) is directly connected to the main body 211 and the top seal 212 by injection molding, and covers at least part of the surface of the circuit board 10, and covers at least part of the surface of the electrode terminal 23, so as to protect the battery cell 20 and the circuit board 10 (such as insulation, waterproofing, salt spray corrosion resistance, drop resistance, etc.), which is conducive to simplifying the battery module (100, 1 00A, 100B, 100C, 100D, 100E, 100F, 100G, 100H), improve the assembly efficiency of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H), reduce the impact of the assembly process of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) on the power-consuming equipment 200, and also help to reduce The number of accessories for protecting the battery cell 20 is reduced, the energy density of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) is increased, and the influence of the energy density of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) on the electrical equipment 200 is reduced, and the adhesive 30 is directly formed on the surface of the circuit board 10 and the plurality of battery cells 20 by injection molding, and It is beneficial to improve the bonding strength of the adhesive 30 to the circuit board 10 and the battery cell 20, reduce the risk of relative movement between the circuit board 10 and the battery cell 20, improve the seismic resistance of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H), and reduce the impact of the seismic resistance of the battery module (100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H) on the electrical equipment 200.

[0263] In one embodiment, the power-consuming device 200 includes but is not limited to a computer, a tablet computer, a mobile phone, a watch, or other consumer electronic products.

[0264] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the disclosure scope of the present application.

Claims

1. A battery module, It is characterized in that include: A plurality of battery cells, wherein the plurality of battery cells are arranged along a first direction, each of the battery cells comprises an electrode assembly, a shell and an electrode terminal, the shell comprises a main body and a top seal portion connected to each other, the electrode assembly is accommodated in the main body, one end of the electrode terminal is electrically connected to the electrode assembly, and the other end of the electrode terminal extends from the top seal portion, and the first direction is a width direction or a length direction of the battery cell; A circuit board, connected to the electrode terminals of the plurality of battery cells; An adhesive member, bonding the main body and the top seal of the plurality of battery cells, the adhesive member covering at least a portion of the surface of the circuit board, and the adhesive member covering at least a portion of the surface of the electrode terminal; The adhesive is formed on the surfaces of the circuit board and the plurality of battery cells by injection molding.

2. The battery module according to claim 1, It is characterized in that The adhesive component is provided with a through hole, and the through hole is configured to be detachably connected to an external electrical device.

3. The battery module according to claim 2, It is characterized in that The battery module further includes a structural member, the adhesive member is bonded to the structural member and covers at least a portion of the surface of the structural member, and the through hole penetrates the structural member.

4. The battery module according to claim 2, It is characterized in that The through hole passes through the circuit board.

5. The battery module according to any one of claims 2 to 4, It is characterized in that The adhesive member comprises: a base covering at least a portion of a surface of the circuit board and at least a portion of a surface of the electrode terminal; The convex part is connected to the base part and extends in a direction away from the main body part, and the through hole passes through the convex part.

6. The battery module according to claim 1, It is characterized in that The battery module also includes a connector, which is connected to the circuit board; The adhesive component is provided with a first slot, and a portion of the connecting component is located in the first slot.

7. The battery module according to claim 1, It is characterized in that The battery module further includes a bracket, the bracket being connected to the adhesive component, and the bracket being configured to be connected to an external electrical device so that the battery module is fixed to the external electrical device.

8. The battery module according to claim 1, It is characterized in that The adhesive member comprises a convex portion, the convex portion is provided with a mounting hole, and the hole wall of the mounting hole is provided with a clamping groove; The battery module also includes a structural member, the outer peripheral surface of the structural member is provided with a flange, the flange is engaged in the slot, the portion of the structural member exposed in the mounting hole is provided with a through hole, and the through hole is configured to be detachably connected to an external electrical device.

9. The battery module according to claim 1, It is characterized in that The adhesive member includes a convex portion, and the convex portion includes a first mounting surface away from the main body portion; The battery module also includes a structural member, which includes a clamping portion and a protruding portion connected along a first arrangement direction. When viewed along the first arrangement direction, the outer peripheral side of the protruding portion does not exceed the outer peripheral side of the clamping portion. A connecting hole is provided at a portion of the protruding portion close to the clamping portion. The clamping portion and the connecting hole are located in the protruding portion. The adhesive is also filled in the connecting hole. The protruding portion extends from the first mounting surface, and the portion of the protruding portion extending from the first mounting surface is configured to be detachably connected to an external electrical device.

10. The battery module according to claim 9, It is characterized in that A through hole is provided at the portion of the protruding portion extending from the first mounting surface, and the through hole is configured to be detachably connected to an external electrical device.

11. The battery module according to claim 9, It is characterized in that The arithmetic mean deviation Ra of the profile of the outer surface of the clamping portion satisfies: 12.5 μm≤Ra≤50 μm; the maximum height Rz of the profile of the outer surface of the clamping portion satisfies: Rz≤3.2 μm.

12. The battery module according to claim 8 or 9, It is characterized in that Along the first direction, an accommodation space is formed between two adjacent main body parts, and the housing further comprises a side sealing part, which is connected to the main body parts and is located at the end of the main body parts along the first direction, and the first direction is the width direction of the battery core; The adhesive member also includes: a base covering at least a portion of a surface of the circuit board and at least a portion of a surface of the electrode terminal; an extension portion, at least a portion of which is located in the accommodation space and is bonded to two adjacent main body portions; a first part, the first part covering a plurality of ends of the main body parts away from the top seal part; A second part, the second part is connected to the base and adhered to the side sealing part of the battery cell located outside along the first direction, and the second part is also connected to the first part; The protrusion is connected to at least one of the base, the first portion, and the second portion, and the protrusion is extended in a direction away from the main body.

13. The battery module according to claim 12, It is characterized in that The main body comprises a top wall and a first wall and a second wall located on both sides of the top wall along a third direction, wherein the third direction is a thickness direction of the battery cell; The top sealing portion extends outward from the top wall along a second direction, the second direction being the length direction of the battery core, the top wall comprising a first top surface and a second top surface, the first top surface being located between the top sealing portion and the first wall, and the second top surface being located between the top sealing portion and the second wall; The circuit board is arranged on the first top surface of the plurality of battery cells, and the circuit board and the top sealing portion are arranged opposite to each other along the third direction; The base portion covers the first top surface, the second top surface, the top seal portion, the electrode terminal, and the circuit board.

14. The battery module according to claim 13, It is characterized in that The circuit board comprises a substrate and an electronic component, the substrate comprises a first surface and a second surface arranged opposite to each other along the third direction, the first surface faces away from the top seal portion, the second surface faces the top seal portion, and the electronic component is connected to the second surface; The base includes a first outer side surface, which covers the first surface. The first outer side surface is provided with a plurality of first positioning holes and a plurality of second positioning holes. Part of the first surface is exposed to the first positioning holes and the second positioning holes. The plurality of first positioning holes are arranged at intervals along the first direction, and the second positioning holes are distributed on both sides of each of the first positioning holes.

15. The battery module according to claim 14, It is characterized in that The base also includes a second outer side surface, which covers the second surface. The second outer side surface is provided with a plurality of third positioning holes, and a portion of the second surface is exposed in the third positioning holes. When observed along the third direction, the third positioning holes are spaced apart from the electronic components, and each of the third positioning holes overlaps with one of the first positioning holes.

16. The battery module according to claim 15, It is characterized in that The second outer side surface comprises: a first area, wherein the circuit board overlaps with the first area along the third direction; a second region, wherein along the third direction, the second top surface overlaps with the second region; a third area, the third area is connected to the first area and the second area, and along the second direction, the third area is arranged opposite to the second top surfaces of the plurality of battery cells, Along the third direction, the distance between the first area and the first wall is D1, the distance between the second area and the first wall is D2, D1 is smaller than D2, and the difference between D1 and D2 is 0.5 mm to 3 mm.

17. The battery module according to claim 13, It is characterized in that The extension portion includes a first end and a second end, and along the third direction, the first end is adjacent to the first wall, and the second end is adjacent to the second wall; The first end portion extends along the first direction to two first walls adjacent to the accommodation space, and / or the second end portion extends along the first direction to two second walls adjacent to the accommodation space.

18. The battery module according to claim 17, It is characterized in that Along the first direction, the length of the overlapping portion between each first end and the first wall of the battery cell is 5 mm to 10 mm; and / or the length of the overlapping portion between each second end and the second wall of the battery cell is 5 mm to 10 mm.

19. The battery module according to claim 17, It is characterized in that Along the third direction, the thickness of the first wall covered by the extending portion is 0.2 mm to 2 mm; and / or the thickness of the second wall covered by the extending portion is 0.2 mm to 2 mm.

20. The battery module according to claim 13, It is characterized in that The battery module also includes a connector, one end of which is electrically connected to the circuit board, and the other end of which is configured to be electrically connected to an external electrical device. The adhesive covers the connector, and the adhesive is provided with a through hole extending along the second direction. The connector is at least partially located in the through hole, and when viewed along the second direction, the hole wall of the through hole abuts against the outer peripheral side of the connector.

21. The battery module according to claim 20, It is characterized in that The adhesive member is provided with a plurality of openings communicating with the through holes, a portion of the connecting member is exposed from the openings, and the plurality of openings are arranged at intervals.

22. The battery module according to claim 20, It is characterized in that The connecting piece includes a wiring harness and a connector; The wiring harness includes a first section, a second section and a third section. Along the second direction, the second section is located on a side of the base away from the battery cell, one end of the second section is electrically connected to the circuit board, and the other end of the second section is connected to the first section. The first section extends from an end of the main body close to the top seal to an end of the main body away from the top seal, and the second portion covers the first section. The first section is at least partially located in the through hole, one end of the third section is connected to the connector, and the connector is configured to be electrically connected to an external electrical device, and the other end of the third section is connected to the first section.

23. The battery module according to claim 12, It is characterized in that The adhesive component further includes a bearing portion, the bearing portion is connected to the first portion, and the bearing portion is provided with a second slot; The battery module also includes a temperature sensor, which includes a probe and a lead. The probe is arranged in the second card slot and adjacent to the main body. One end of the lead is electrically connected to the probe, and the other end of the lead is electrically connected to the circuit board.

24. An electrical device, It is characterized in that Comprising a battery module as claimed in any one of claims 1 to 23.

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