Battery module, battery and electric device

Abstract

The invention provides a battery module, a battery and a power utilization device, and belongs to the technical field of batteries. The battery module comprises a battery pack, an end plate and an insulating part, the end plate is arranged on one side of the battery pack in the first direction, and an avoiding area is formed at the corner of the end plate. The insulating part is arranged between the battery pack and the end plate in the first direction so as to insulate and isolate the battery pack and the end plate. A corner area is formed at the position, corresponding to the avoiding area, of the insulating part and fixedly connected to the battery pack. The corner area formed by the avoiding area of the insulating part corresponding to the end plate is fixedly connected to the battery pack, so that the phenomenon that the corner area of the insulating part tilts or is separated is reduced, and on one hand, the structural stability of the insulating part assembled between the end plate and the battery pack can be improved; and on the other hand, the interference influence on the assembly area of the end plate due to tilting or separation of the corner area of the insulating part can be reduced, so that the assembly difficulty of the battery module can be reduced, and the assembly quality of the battery module can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module, a battery and an electrical device. Background Art

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery is provided with a box and multiple battery modules contained in the box, and the battery module includes multiple battery cells. Among them, the battery, as a core component of new energy vehicles, has high requirements in terms of safety, so an insulating member is provided between the end plate of the battery module and the multiple battery cells to improve the safety of the battery module. However, the existing battery module is easily affected by the interference of the insulating member during the assembly process, which makes the assembly of the battery module more difficult and the assembly quality is poor. Summary of the invention

[0003] The embodiments of the present application provide a battery module, a battery, and an electrical device, which can effectively reduce the difficulty of assembling the battery module and improve the assembly quality of the battery module.

[0004] In a first aspect, an embodiment of the present application provides a battery module, comprising a battery pack, an end plate and an insulating member; the end plate is arranged on one side of the battery pack along a first direction, and an escape zone is formed at the corner of the end plate; the insulating member is arranged between the battery pack and the end plate along the first direction to insulate and isolate the battery pack and the end plate; wherein the insulating member forms a corner zone at a position corresponding to the escape zone, and the corner zone is fixedly connected to the battery pack.

[0005] In the above technical solution, an insulating member is arranged between the end plate and the battery pack, so that the insulating member can insulate and isolate the end plate and the battery pack to reduce the risk of short circuit between the end plate and the battery pack, which is beneficial to improving the reliability of the battery module. Among them, by fixing the corner area formed by the avoidance area at the corner of the end plate corresponding to the insulating member to the battery pack, it is beneficial to reduce the phenomenon of the corner area of ​​the insulating member being lifted up or detached in the avoidance area of ​​the end plate. On the one hand, it can improve the structural stability of the insulating member assembled between the end plate and the battery pack, and on the other hand, it can reduce the interference effect of the corner area of ​​the insulating member on the assembly area of ​​the end plate due to lifting or detachment, thereby reducing the difficulty of assembling the battery module and helping to improve the assembly quality of the battery module.

[0006] In some embodiments, the battery module further includes an adhesive member; the adhesive member is disposed between the insulating member and the battery pack, and the adhesive member connects the corner area and the battery pack.

[0007] In the above technical solution, an adhesive is provided between the insulating part and the battery pack so that the corner area of ​​the insulating part can be bonded to the battery pack through the adhesive, thereby achieving fixed connection of the corner area of ​​the insulating part to the battery pack. A battery module with such a structure facilitates fixing the corner area of ​​the insulating part on the battery pack to alleviate the phenomenon of warping or detachment of the corner area of ​​the insulating part. The structure is simple and easy to assemble.

[0008] In some embodiments, the insulating member is rectangular, the insulating member is formed with four corner regions, the battery module includes four adhesive members, and each corner region is connected to the battery pack via one adhesive member.

[0009] In the above technical solution, the insulating member is a rectangular structure so that the insulating member has four corner areas. Four adhesive members are respectively arranged at the four corner areas so that the four corner areas of the insulating member can be bonded to the battery pack through the adhesive members, thereby further improving the structural stability of the insulating member arranged between the end plate and the battery pack, and effectively alleviating the phenomenon of warping or detachment of the four corner areas of the insulating member.

[0010] In some embodiments, along the first direction, a groove is provided on a side of the insulating member facing away from the battery pack and corresponding to the adhesive member, and an orthographic projection of the adhesive member is located in the groove.

[0011] In the above technical solution, a groove is provided on the side of the insulating part away from the battery pack and corresponding to the area of ​​the adhesive, so that the protrusion formed by the corner area of ​​the insulating part where the adhesive is provided protruding in the direction away from the battery pack after being bonded to the battery pack can be accommodated in the groove. The battery module adopting this structure can reduce the interference between the protrusion formed by the area of ​​the insulating part where the adhesive is provided protruding in the direction away from the battery pack after being bonded to the battery pack and other components such as the end plate, thereby reducing the interference effect of the protrusion formed by the insulating part due to the setting of the adhesive on the assembly area of ​​the end plate, thereby reducing the difficulty of assembling the battery module and helping to improve the assembly quality of the battery module.

[0012] In some embodiments, along the first direction, the thickness of the adhesive is D1, and the depth of the groove is H, satisfying D1≤H.

[0013] In the above technical solution, by setting the thickness of the adhesive in the first direction to be less than or equal to the groove depth of the groove in the first direction, the protrusion formed by the corner area where the insulating part is provided with the adhesive and protruding away from the battery pack after being bonded to the battery pack can be entirely accommodated in the groove and will not extend out of the groove, thereby further reducing the interference effect of the protrusion formed by the insulating part due to the setting of the adhesive on the assembly area of ​​the end plate.

[0014] In some embodiments, the insulating member includes a first insulating layer and a second insulating layer stacked along the first direction, the first insulating layer is located on a side of the second insulating layer facing the battery pack, and the adhesive member is arranged on a side of the first insulating layer facing the battery pack; wherein, along the first direction, the second insulating layer is provided with a notch in an area corresponding to the adhesive member, the notch penetrates the second insulating layer, and the notch and the surface of the first insulating layer facing the second insulating layer jointly define the groove.

[0015] In the above technical solution, the insulating member is provided with a first insulating layer and a second insulating layer, the first insulating layer and the second insulating layer are stacked along a first direction, and the first insulating layer is located on the side of the second insulating layer facing the battery pack, by arranging an adhesive member on the side of the first insulating layer facing the battery pack, and arranging a notch penetrating the second insulating layer in an area corresponding to the adhesive member on the second insulating layer, so that the notch and the surface of the first insulating layer facing the second insulating layer can form a groove together, so as to form a groove on the side of the insulating member away from the battery pack and in the area corresponding to the adhesive member. The insulating member with this structure is easy to process and manufacture, which is beneficial to reduce the difficulty of setting the groove on the insulating member, thereby effectively improving the production efficiency of the battery module.

[0016] In some embodiments, along the first direction, a thickness of the first insulating layer is equal to a thickness of the second insulating layer.

[0017] In the above technical solution, by setting the first insulating layer and the second insulating layer of the insulating part to a structure with equal thickness in the first direction, it is convenient to use sheets of the same thickness to form the first insulating layer and the second insulating layer respectively, which is beneficial to optimize the reserves of raw materials and reduce the manufacturing cost of the insulating part.

[0018] In some embodiments, the insulating member further includes an adhesive layer; the adhesive layer is disposed between the first insulating layer and the second insulating layer along the first direction, and the adhesive layer connects the first insulating layer and the second insulating layer.

[0019] In the above technical solution, an adhesive layer is provided between the first insulating layer and the second insulating layer so that the first insulating layer and the second insulating layer can be connected through the adhesive layer. On the one hand, the structural stability of the first insulating layer and the second insulating layer stacked on each other can be improved, and on the other hand, the difficulty of assembling the first insulating layer and the second insulating layer can be reduced, which is convenient for manufacturing and conducive to optimizing the production cycle.

[0020] In some embodiments, along the first direction, the thickness of the insulating member is D2, satisfying 0.4 mm ≤ D2 ≤ 2 mm.

[0021] In the above technical solution, by setting the thickness of the insulating member in the first direction to be greater than or equal to 0.4 mm, on the one hand, the insulating isolation effect of the insulating member on the end plate and the battery pack can be improved to reduce the risk of short circuit between the end plate and the battery pack, and on the other hand, the hardness of the insulating member can be improved so that the insulating member has a better contour shape, thereby facilitating the assembly of the insulating member between the end plate and the battery pack and reducing the deformation of the insulating member. By setting the thickness of the insulating member in the first direction to be less than or equal to 2 mm, the space occupied by the insulating member can be saved, thereby improving the space utilization of the battery module, which is conducive to improving the energy density of the battery module.

[0022] In some embodiments, the insulating member is provided with a flange portion at one end in the second direction, the flange portion extends from the side of the insulating member facing the battery pack toward the direction close to the battery pack, the flange portion abuts against the battery pack along the second direction, and the second direction is perpendicular to the first direction.

[0023] In the above technical solution, a flange portion is provided at one end of the insulating part along the second direction, and the flange portion protrudes from the side of the insulating part facing the battery pack along the first direction, so that the flange portion can abut against the battery pack in the second direction. On the one hand, the insulating part with such a structure can play a certain limiting and positioning role on the insulating part through the flange portion, so as to facilitate the assembly of the insulating part between the end plate and the battery pack, which is beneficial to reduce the difficulty of assembling the insulating part between the end plate and the battery pack. On the other hand, it can further improve the reliability and structural stability of the insulating part assembled between the end plate and the battery pack.

[0024] In some embodiments, the battery pack includes a plurality of battery cells, and the plurality of battery cells are stacked along the first direction.

[0025] In the above technical solution, the battery pack is provided with a plurality of battery cells, and the plurality of battery cells are stacked along a first direction, so that it is convenient to arrange the insulating member between the end plate and the adjacent battery cells, and it is convenient to fix the corner area of ​​the insulating member to the adjacent battery cells, which is beneficial to reduce the difficulty of assembling the insulating member and the battery pack.

[0026] In some embodiments, the battery module includes two end plates, and the two end plates are respectively arranged on both sides of the battery pack along the first direction; wherein, along the first direction, the insulating member is arranged between the two end plates and the battery pack.

[0027] In the above technical solution, the battery module is provided with two end plates, and the two end plates are respectively located on both sides of the battery pack in the first direction, so as to clamp and assemble the battery pack. By providing insulating parts between the two end plates and the battery pack, the two end plates and the battery pack can be effectively insulated and isolated, so as to improve the reliability of the battery module.

[0028] In some embodiments, the battery module further includes two side plates, which are respectively arranged on both sides of the battery pack along a third direction, and the two ends of the side plates in the first direction are respectively connected to the two end plates, and the third direction is perpendicular to the first direction.

[0029] In the above technical solution, the battery module is also provided with two side panels, and the two side panels are respectively arranged on both sides of the battery pack along the third direction, and the two ends of the side panels in the first direction are respectively connected to the two end plates, so that the two side panels and the two end plates are enclosed to form an outer frame for assembling the battery pack, which is beneficial to improving the integrity and structural stability of the battery module.

[0030] In a second aspect, an embodiment of the present application further provides a battery, comprising the above-mentioned battery module.

[0031] In a third aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0034] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application;

[0036] Figure 4 An exploded view of the structure of a battery module provided in some embodiments of the present application;

[0037] Figure 5 A schematic diagram of the structure of an insulating member of a battery module provided in some embodiments of the present application;

[0038] Figure 6 A front view of a side of an insulating member of a battery module facing the battery pack according to some embodiments of the present application;

[0039] Figure 7 A front view of a side of an insulating member of a battery module of some embodiments of the present application facing away from the battery pack;

[0040] Figure 8 A front view of an insulating member of a battery module in some embodiments of the present application in a third direction;

[0041] Fig. 9 A schematic structural diagram of a second insulating layer of an insulating member of a battery module according to some embodiments of the present application;

[0042] Fig.10 A cross-sectional view of an insulating member of a battery module according to some embodiments of the present application.

[0043] Icons: 1000-vehicle; 100-battery; 10-box; 11-first box body; 12-second box body; 20-battery module; 21-battery pack; 211-battery cell; 22-end plate; 221-avoidance area; 23-insulating member; 231-corner area; 232-groove; 233-first insulating layer; 234-second insulating layer; 2341-notch; 235-adhesive layer; 236-flanged portion; 24-side panel; 25-adhesive member; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0046] Reference to "embodiment" in this application 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 places 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.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of 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 descriptions and should not constitute any limitation to the present application.

[0050] The term "plurality" used in the present application refers to two or more (including two).

[0051] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0052] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0053] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0054] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0055] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0056] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0057] In some embodiments, the separator is a separator membrane. There may be many types of separator membranes, and any known porous separator membrane with good chemical stability and mechanical stability may be selected.

[0058] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0059] In some embodiments, the electrode assembly is a laminate structure.

[0060] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0061] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0062] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0063] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0064] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0065] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0066] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0067] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0068] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes but is not limited to a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc.

[0069] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0070] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0071] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0072] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0073] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0074] Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. The development of battery technology must consider many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the safety of the battery also needs to be considered.

[0075] For a general battery, the battery includes a box body and a plurality of battery modules contained in the box body. The battery module includes a plurality of battery cells arranged in a stacked manner and a side plate and an end plate arranged around the plurality of battery cells. A avoidance zone is formed at the corner of the end plate, and a through hole for locking bolts is provided in the avoidance zone. Since the end plate is made of a metal conductive material, in order to improve the safety of the battery module, an insulating member is usually sandwiched between the end plate and the plurality of battery cells in the related art, so that the insulating member can insulate and isolate the end plate and the battery cells to reduce the risk of short circuit between the battery cells and the end plate. However, the insulating member of the battery module of this structure is prone to warping at the four corners corresponding to the position of the avoidance zone of the end plate, which, on the one hand, leads to poor assembly quality of the insulating member, and on the other hand, after the insulating member is warped, it is easy to interfere with the assembly area of ​​the bolt locking of the end plate of the battery module, so that the assembly of the battery module is difficult and the assembly quality of the battery module is poor.

[0076] Based on the above considerations, in order to solve the problem of high difficulty and poor assembly quality of the battery module during assembly, an embodiment of the present application provides a battery module, which includes a battery pack, an end plate and an insulating member. The end plate is arranged on one side of the battery pack along a first direction, and a avoidance zone is formed at the corner of the end plate. The insulating member is arranged between the battery pack and the end plate along the first direction to insulate and isolate the battery pack and the end plate. A corner zone is formed at the position of the insulating member corresponding to the avoidance zone, and the corner zone is fixedly connected to the battery pack.

[0077] In a battery module of this structure, an insulating member is provided between the end plate and the battery pack, so that the insulating member can insulate and isolate the end plate and the battery pack to reduce the risk of short circuit between the end plate and the battery pack, which is beneficial to improving the reliability of the battery module. Specifically, by fixing the corner area formed by the avoidance area at the corner of the end plate corresponding to the insulating member to the battery pack, it is beneficial to reduce the phenomenon of the corner area of ​​the insulating member being lifted up or detached in the avoidance area of ​​the end plate. On the one hand, it can improve the structural stability of the insulating member assembled between the end plate and the battery pack, and on the other hand, it can reduce the interference effect of the corner area of ​​the insulating member on the assembly area of ​​the end plate due to lifting or detachment, thereby reducing the difficulty of assembling the battery module and helping to improve the assembly quality of the battery module.

[0078] The battery module disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery module and battery disclosed in the present application can be used to form the electrical device, which is helpful to alleviate the problem that the corners of the insulating parts of the battery module are easily lifted up and interfere with other assembly areas, thereby reducing the difficulty of assembling the battery module and improving the assembly quality of the battery module.

[0079] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0080] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0081] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source or a power source for the vehicle 1000, etc. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0082] In some embodiments of the present application, the battery 100 can not only serve as an operating power source or a use power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0083] Please refer to Figure 2 and Figure 3 , Figure 2 The structure explosion diagram of the battery 100 provided in some embodiments of the present application is shown in FIG. Figure 3 The battery 100 includes a box 10 and a battery module 20 , and the battery module 20 is used to be accommodated in the box 10 .

[0084] The box body 10 is used to provide an assembly space for the battery module 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery module 20. The second box body 12 may be a hollow structure with one end open, the first box body 11 may be a plate-like structure, and the first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define an assembly space; the first box body 11 and the second box body 12 may also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12.

[0085] Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid or a cube. Figure 2 In the embodiment, the box body 10 is in the shape of a rectangular parallelepiped.

[0086] In the battery 100, the battery module 20 may be one or more. Figure 2 In the embodiment, the battery 100 includes a plurality of battery modules 20, and the plurality of battery modules 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery modules 20 are both connected in series and in parallel. The plurality of battery modules 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the plurality of battery modules 20 is accommodated in the box 10. The battery 100 may also include a conductive member (copper bar or aluminum bar, etc.), and the conductive member is used to realize the electrical connection between the plurality of battery modules 20.

[0087] According to some embodiments of the present application, referring to Figure 3 , and please refer to Figure 4 and Figure 5 , Figure 4 This is an exploded view of the structure of the battery module 20 provided in some embodiments of the present application. Figure 5 A schematic diagram of the structure of the insulating member 23 of the battery module 20 provided in some embodiments of the present application. The present application provides a battery module 20, and the battery module 20 includes a battery pack 21, an end plate 22 and an insulating member 23. The end plate 22 is arranged on one side of the battery pack 21 along the first direction X, and an escape area 221 is formed at the corner of the end plate 22. The insulating member 23 is arranged between the battery pack 21 and the end plate 22 along the first direction X to insulate and isolate the battery pack 21 and the end plate 22. A corner area 231 is formed at the position of the insulating member 23 corresponding to the escape area 221, and the corner area 231 is fixedly connected to the battery pack 21.

[0088] The battery pack 21 is a component in the battery module 20 that provides electrical energy. Figure 3 and Figure 4 In the embodiment, the battery pack 21 includes a plurality of battery cells 211 , and the plurality of battery cells 211 are stacked along a first direction X. Of course, in other embodiments, the battery pack 21 may also include only one battery cell 211 .

[0089] In the battery pack 21 , multiple battery cells 211 may be connected in series, in parallel, or in mixed connection. The battery pack 21 may also include other structures, for example, the battery pack 21 may also include a busbar component, which is used to connect the multiple battery cells 211 to achieve electrical connection between the multiple battery cells 211 .

[0090] Each battery cell 211 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 211 may be in a rectangular parallelepiped, a prism or other shapes. Figure 3 and Figure 4 In the figure, the battery cell 211 is a rectangular parallelepiped structure.

[0091] The end plate 22 is disposed on one side of the battery pack 21 along the first direction X, that is, the end plate 22 and the battery pack 21 are arranged along the first direction X.

[0092] An escape area 221 is formed at the corner of the end plate 22, that is, the escape area 221 is a vacant portion formed at the corner of the end plate 22, so that the portion of the insulating member 23 corresponding to the escape area 221 of the end plate 22 is exposed, and the escape area 221 of the end plate 22 is used for locking bolts, etc.

[0093] In some embodiments, the battery module 20 may include two end plates 22 and two side plates 24 (i.e., the outer frame of the battery module 20, used to accommodate and assemble the battery pack 21), the two end plates 22 are spaced and arranged relatively along the first direction X (i.e., the length direction of the battery module 20), the second direction Y is the height direction of the battery module 20, the two side plates 24 are spaced and arranged relatively along the third direction Z (i.e., the width direction of the battery module 20), and the two side plates 24 and the two end plates 22 are enclosed to form an accommodating space for accommodating the battery cells 211, that is, one end plate 22, one side plate 24, another end plate 22 and another side plate 24 are connected end to end in sequence to enclose and form the outer frame of the battery module 20, so as to accommodate the battery pack 21. Among them, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0094] Optionally, the battery module 20 includes two insulating members 23 , and along the first direction X, the insulating members 23 are disposed between the two end plates 22 and the battery group 21 .

[0095] The insulating member 23 is disposed between the battery pack 21 and the end plate 22 along the first direction X, that is, the insulating member 23 is disposed on a side of the battery pack 21 facing the end plate 22 in the first direction X.

[0096] The insulating member 23 serves to insulate and isolate the end plate 22 and the battery pack 21 . The insulating member 23 may be made of a variety of materials, such as polyethylene, polypropylene or polyvinyl chloride.

[0097] A corner area 231 is formed at a position of the insulating member 23 corresponding to the avoidance area 221 , that is, the exposed area at the corner of the insulating member 23 corresponding to the avoidance area 221 of the end plate 22 is the corner area 231 of the insulating member 23 .

[0098] The corner area 231 is fixedly connected to the battery pack 21 . Optionally, the corner area 231 may be fixedly connected to the battery pack 21 by bonding, bolting, or other structures.

[0099] An insulating member 23 is provided between the end plate 22 and the battery pack 21, so that the insulating member 23 can insulate and isolate the end plate 22 and the battery pack 21, so as to reduce the risk of short circuit between the end plate 22 and the battery pack 21, which is beneficial to improving the reliability of the battery module 20. Among them, by fixing the corner area 231 formed by the avoidance area 221 at the corner of the end plate 22 corresponding to the insulating member 23 to the battery pack 21, it is beneficial to reduce the phenomenon that the corner area 231 of the insulating member 23 is lifted up or detached in the avoidance area 221 of the end plate 22, thereby, on the one hand, improving the structural stability of the insulating member 23 assembled between the end plate 22 and the battery pack 21, and on the other hand, reducing the interference effect of the corner area 231 of the insulating member 23 on the assembly area of ​​the end plate 22 due to lifting or detachment, thereby reducing the difficulty of assembling the battery module 20 and helping to improve the assembly quality of the battery module 20.

[0100] According to some embodiments of the present application, referring to Figure 4 and Figure 5 , and please refer to Figure 6 , Figure 6 This is a front view of the side of the insulating member 23 of the battery module 20 facing the battery pack 21 in some embodiments of the present application. The battery module 20 may further include an adhesive member 25, which is disposed between the insulating member 23 and the battery pack 21, and connects the corner area 231 and the battery pack 21.

[0101] Among them, the adhesive 25 is arranged between the insulating member 23 and the battery pack 21, that is, the adhesive 25 is arranged on the side of the insulating member 23 facing the battery pack 21, and the adhesive 25 is located in the corner area 231 of the insulating member 23, so that the adhesive 25 can adhere to the corner area 231 of the insulating member 23 and the adjacent battery cells 211 in the battery pack 21 to fix the corner area 231 of the insulating member 23 to the battery pack 21.

[0102] Exemplarily, the adhesive member 25 may be glue, double-sided tape, or sponge adhesive, etc., which is disposed on the side of the insulating member 23 facing the battery pack 21 .

[0103] By setting an adhesive member 25 between the insulating member 23 and the battery pack 21, the corner area 231 of the insulating member 23 can be bonded to the battery pack 21 through the adhesive member 25, thereby achieving fixed connection of the corner area 231 of the insulating member 23 to the battery pack 21. The battery module 20 using this structure is convenient for fixing the corner area 231 of the insulating member 23 on the battery pack 21 to alleviate the phenomenon of the corner area 231 of the insulating member 23 being lifted up or detached. The structure is simple and easy to assemble.

[0104] In some embodiments, see Figure 4 , Figure 5 and Figure 6As shown, the insulating member 23 is rectangular and has four corner regions 231 formed therein. The battery module 20 includes four adhesive members 25 , and each corner region 231 is connected to the battery pack 21 via an adhesive member 25 .

[0105] The insulating member 23 is a rectangular structure, so that the insulating member 23 has four right angles. Correspondingly, the end plate 22 is also a rectangular structure, and the end plate 22 forms avoidance areas 221 at the four right angles, so that the insulating member 23 forms four corner areas 231 accordingly.

[0106] The insulating member 23 is a rectangular structure, so that the insulating member 23 forms four corner areas 231. By respectively setting four adhesive members 25 at the four corner areas 231, the four corner areas 231 of the insulating member 23 can be bonded to the battery pack 21 through the adhesive members 25, thereby further improving the structural stability of the insulating member 23 set between the end plate 22 and the battery pack 21, and can effectively alleviate the phenomenon of warping or detachment of the four corner areas 231 of the insulating member 23.

[0107] According to some embodiments of the present application, referring to Figure 4 , Figure 5 and Figure 6 , and please refer to Figure 7 and Figure 8 , Figure 7 This is a front view of the side of the insulating member 23 of the battery module 20 facing away from the battery pack 21 in some embodiments of the present application. Figure 8 It is a front view of the insulating member 23 of the battery module 20 of some embodiments of the present application in the third direction Z. Along the first direction X, a groove 232 is provided on the side of the insulating member 23 facing away from the battery pack 21 and corresponding to the adhesive member 25 , and the orthographic projection of the adhesive member 25 is located in the groove 232 .

[0108] Among them, a groove 232 is provided on the side of the insulating member 23 facing away from the battery pack 21 and corresponding to the area of ​​the adhesive member 25, that is, a groove 232 is provided on the side of the corner area 231 of the insulating member 23 facing away from the battery pack 21 in the first direction X, and the positive projection of the adhesive member 25 in the first direction X is located in the groove 232, that is, the bottom surface of the groove 232 covers the adhesive member 25 in the first direction X.

[0109] For example, in Figure 5 and Figure 7 In the embodiment, the groove 232 extends to the edge of the insulating member 23 in both the second direction Y and the third direction Z.

[0110] By setting a groove 232 on the side of the insulating part 23 away from the battery pack 21 and corresponding to the area of ​​the adhesive 25, the protrusion formed by the corner area 231 of the insulating part 23 where the adhesive 25 is set protruding in the direction away from the battery pack 21 after being bonded to the battery pack 21 can be accommodated in the groove 232. The battery module 20 adopting this structure can reduce the interference between the protrusion formed by the area of ​​the insulating part 23 where the adhesive 25 is set protruding in the direction away from the battery pack 21 after being bonded to the battery pack 21 and other components such as the end plate 22, thereby reducing the interference effect of the protrusion formed by the insulating part 23 due to the setting of the adhesive 25 on the assembly area of ​​the end plate 22, thereby reducing the difficulty of assembling the battery module 20 and helping to improve the assembly quality of the battery module 20.

[0111] According to some embodiments of the present application, see Figure 8 As shown, along the first direction X, the thickness of the adhesive member 25 is D1, and the depth of the groove 232 is H, satisfying D1≤H.

[0112] Among them, the thickness of the adhesive 25 is less than or equal to the groove depth of the groove 232, that is, when the adhesive 25 is set in the groove 232, the adhesive 25 can be accommodated in the groove 232 as a whole and will not extend out of the groove 232, so that after the corner area 231 of the insulating part 23 is adhered to the battery cell 211 of the battery pack 21 through the adhesive 25, the protrusion structure formed by the corner area 231 protruding away from the battery pack 21 can be accommodated in the groove 232.

[0113] By setting the thickness of the adhesive 25 in the first direction X to be less than or equal to the groove depth of the groove 232 in the first direction X, the protrusion formed by the corner area 231 of the insulating member 23 where the adhesive 25 is set and protruding away from the battery pack 21 after being bonded to the battery pack 21 can be entirely accommodated in the groove 232 and will not extend out of the groove 232, thereby further reducing the interference effect of the protrusion formed on the insulating member 23 due to the setting of the adhesive 25 on the assembly area of ​​the end plate 22.

[0114] According to some embodiments of the present application, referring to Figure 5 , Figure 6 , Figure 7 and Figure 8 , and please refer to Fig. 9 , Fig. 9Schematic diagram of the structure of the second insulating layer 234 of the insulating member 23 of the battery module 20 of some embodiments of the present application. The insulating member 23 may include a first insulating layer 233 and a second insulating layer 234 stacked along a first direction X, the first insulating layer 233 is located on the side of the second insulating layer 234 facing the battery pack 21, and the adhesive member 25 is disposed on the side of the first insulating layer 233 facing the battery pack 21. Along the first direction X, a notch 2341 is disposed in the area of ​​the second insulating layer 234 corresponding to the adhesive member 25, the notch 2341 penetrates the second insulating layer 234, and the notch 2341 and the surface of the first insulating layer 233 facing the second insulating layer 234 jointly define a groove 232.

[0115] Among them, a notch 2341 is set in the area of ​​the second insulating layer 234 corresponding to the adhesive 25, and the notch 2341 penetrates the second insulating layer 234, that is, the notch 2341 is formed at the corner of the second insulating layer 234 corresponding to the position of the adhesive 25, and the notch 2341 is a structure that penetrates the surface of both sides of the second insulating layer 234 in the first direction X, so that the position where the notch 2341 is set in the second insulating layer 234 forms a groove 232 together with the first insulating layer 233, that is, the surface of the first insulating layer 233 facing the second insulating layer 234 and the area corresponding to the notch 2341 of the second insulating layer 234 is the bottom surface of the groove 232.

[0116] It should be noted that, in some embodiments, the insulating member 23 may also be an integral structure, that is, the insulating member 23 is a single-layer structure. In this embodiment, a groove 232 can be set on the side of the insulating member 23 away from the battery pack 21 and corresponding to the adhesive 25 through processes such as extrusion molding or cutting.

[0117] The insulating member 23 is provided with a first insulating layer 233 and a second insulating layer 234, and the first insulating layer 233 and the second insulating layer 234 are stacked along the first direction X, and the first insulating layer 233 is located on the side of the second insulating layer 234 facing the battery pack 21. By arranging the adhesive 25 on the side of the first insulating layer 233 facing the battery pack 21, and arranging a notch 2341 penetrating the second insulating layer 234 in the area corresponding to the adhesive 25 on the second insulating layer 234, the notch 2341 can form a groove 232 together with the surface of the first insulating layer 233 facing the second insulating layer 234, so as to form a groove 232 on the side of the insulating member 23 away from the battery pack 21 and in the area corresponding to the adhesive 25. The insulating member 23 with this structure is easy to process and manufacture, which is conducive to reducing the difficulty of setting the groove 232 on the insulating member 23, thereby effectively improving the production efficiency of the battery module 20.

[0118] In some embodiments, see Figure 8 As shown, along the first direction X, the thickness of the first insulating layer 233 is equal to the thickness of the second insulating layer 234 .

[0119] By setting the first insulating layer 233 and the second insulating layer 234 of the insulating member 23 to have equal thickness in the first direction X, it is convenient to use sheets of the same thickness to form the first insulating layer 233 and the second insulating layer 234 respectively, which is beneficial to optimize the reserves of raw materials and reduce the manufacturing cost of the insulating member 23.

[0120] According to some embodiments of this application, please refer to Fig.10 , Fig.10 2 is a cross-sectional view of an insulating member 23 of a battery module 20 according to some embodiments of the present application. The insulating member 23 may further include an adhesive layer 235 disposed between the first insulating layer 233 and the second insulating layer 234 along the first direction X, and the adhesive layer 235 connects the first insulating layer 233 and the second insulating layer 234.

[0121] The adhesive layer 235 serves to bond the first insulating layer 233 and the second insulating layer 234 . The adhesive layer 235 may have various structures. For example, the adhesive layer 235 may be glue, double-sided tape, etc. disposed between the first insulating layer 233 and the second insulating layer 234 .

[0122] Of course, the structure of the insulating member 23 is not limited thereto. In other embodiments, the insulating member 23 may not be provided with the adhesive layer 235 , and the first insulating layer 233 and the second insulating layer 234 may be directly connected by hot-melt.

[0123] By providing an adhesive layer 235 between the first insulating layer 233 and the second insulating layer 234 so that the first insulating layer 233 and the second insulating layer 234 can be connected through the adhesive layer 235, on the one hand, the structural stability of the first insulating layer 233 and the second insulating layer 234 stacked on each other can be improved, and on the other hand, the difficulty of assembling the first insulating layer 233 and the second insulating layer 234 can be reduced, which is convenient for manufacturing and helps to optimize the production cycle.

[0124] According to some embodiments of this application, please continue to refer to Fig.10 As shown, along the first direction X, the thickness of the insulating member 23 is D2, satisfying 0.4 mm≤D2≤2 mm.

[0125] Illustratively, the thickness D2 of the insulating member 23 in the first direction X may be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2 mm, etc.

[0126] It should be noted that in the embodiment where the thickness of the first insulating layer 233 is equal to the thickness of the second insulating layer 234, preferably, the thickness of the first insulating layer 233 in the first direction X may be 0.25 mm, and correspondingly, the thickness of the second insulating layer 234 in the first direction X is 0.25 mm.

[0127] By setting the thickness of the insulating member 23 in the first direction X to be greater than or equal to 0.4 mm, on the one hand, the insulating isolation effect of the insulating member 23 between the end plate 22 and the battery pack 21 can be improved to reduce the risk of short circuit between the end plate 22 and the battery pack 21, and on the other hand, the hardness of the insulating member 23 can be improved so that the insulating member 23 has a better contour shape, thereby facilitating the assembly of the insulating member 23 between the end plate 22 and the battery pack 21, and reducing the deformation of the insulating member 23. By setting the thickness of the insulating member 23 in the first direction X to be less than or equal to 2 mm, the space occupied by the insulating member 23 can be saved, thereby improving the space utilization of the battery module 20, which is conducive to improving the energy density of the battery module 20.

[0128] According to some embodiments of the present application, see Figure 5 , Figure 8 and Fig.10 As shown, a flange portion 236 is provided at one end of the insulating member 23 in the second direction Y, and the flange portion 236 extends from the side of the insulating member 23 facing the battery pack 21 toward the direction close to the battery pack 21. The flange portion 236 abuts against the battery pack 21 along the second direction Y, and the second direction Y is perpendicular to the first direction X.

[0129] The second direction Y is the height direction of the battery module 20 , the height direction of the battery cell 211 , and also the assembly direction of the insulating member 23 between the end plate 22 and the battery pack 21 .

[0130] The flange portion 236 extends from the side of the insulating member 23 facing the battery pack 21 toward the battery pack 21 , that is, the flange portion 236 is a structure protruding along the first direction X toward the battery pack 21 and protruding from the side of the insulating member 23 facing the battery pack 21 .

[0131] It should be noted that, in the embodiment where the insulating member 23 includes a first insulating layer 233 and a second insulating layer 234 stacked along the first direction X, the flange portion 236 is connected to one end of the first insulating layer 233 in the second direction Y, and protrudes from the side of the first insulating layer 233 facing the battery pack 21, so that the flange portion 236 and the first insulating layer 233 form an "L"-shaped structure. Figure 8In the embodiment, the flange portion 236 protrudes from the side of the first insulating layer 233 facing the battery pack 21, and the dimension thereof is greater than the thickness of the adhesive 25 in the first direction X. That is, the flange portion 236 extends from the side of the adhesive 25 facing the battery pack 21 along the first direction X, so that the flange portion 236 can abut against the battery pack 21. Figure 8 and Fig.10 In the embodiment, the flange portion 236 and the first insulating layer 233 are an integrally formed structure. Of course, in other embodiments, the flange portion 236 and the first insulating layer 233 are separately arranged structures, and the flange portion 236 can be connected to one end of the first insulating layer 233 in the second direction Y by a structure such as bonding or hot-melt connection.

[0132] By providing a flange portion 236 at one end of the insulating member 23 along the second direction Y, and the flange portion 236 protruding from the side of the insulating member 23 facing the battery pack 21 along the first direction X, the flange portion 236 can be abutted against the battery pack 21 in the second direction Y. The insulating member 23 with such a structure can, on the one hand, play a certain limiting and positioning role on the insulating member 23 through the flange portion 236, so as to facilitate the assembly of the insulating member 23 between the end plate 22 and the battery pack 21, which is beneficial to reduce the difficulty of assembling the insulating member 23 between the end plate 22 and the battery pack 21, and on the other hand, it can further improve the reliability and structural stability of the insulating member 23 assembled between the end plate 22 and the battery pack 21.

[0133] According to some embodiments of the present application, see Figure 3 and Figure 4 As shown, the battery pack 21 may include a plurality of battery cells 211 , and the plurality of battery cells 211 are stacked along a first direction X. Of course, in other embodiments, the plurality of battery cells 211 may also be stacked along a third direction Z.

[0134] The battery pack 21 is provided with a plurality of battery cells 211, and the plurality of battery cells 211 are a structure stacked along a first direction X, so that it is convenient to set the insulating member 23 between the end plate 22 and the adjacent battery cell 211, and it is convenient to fix the corner area 231 of the insulating member 23 to the adjacent battery cell 211, which is beneficial to reduce the difficulty of assembling the insulating member 23 and the battery pack 21.

[0135] According to some embodiments of the present application, see Figure 3 and Figure 4 As shown, the battery module 20 may include two end plates 22 , which are respectively disposed on both sides of the battery pack 21 along the first direction X. Along the first direction X, an insulating member 23 is disposed between the two end plates 22 and the battery pack 21 .

[0136] Exemplarily, the end plate 22 is made of metal.

[0137] The battery module 20 is provided with two end plates 22, and the two end plates 22 are respectively located on both sides of the battery pack 21 in the first direction X, so as to clamp and assemble the battery pack 21. By providing insulating parts 23 between the two end plates 22 and the battery pack 21, the two end plates 22 and the battery pack 21 can be effectively insulated and isolated, so as to improve the reliability of the battery module 20.

[0138] In some embodiments, see Figure 3 and Figure 4 As shown, the battery module 20 may further include two side plates 24, which are respectively arranged on both sides of the battery pack 21 along a third direction Z, and the two ends of the side plates 24 in the first direction X are respectively connected to the two end plates 22, and the third direction Z is perpendicular to the first direction X.

[0139] The two ends of the side plate 24 in the first direction X are respectively connected to the two end plates 22 , that is, the two end plates 22 are respectively connected to the two ends of the side plate 24 in the first direction X, so that the two end plates 22 and the two side plates 24 enclose and form an outer frame for accommodating the battery pack 21 .

[0140] Exemplarily, the side panels 24 are made of insulating and heat-isolating materials, such as rubber, plastic, or mica.

[0141] The battery module 20 is also provided with two side panels 24, and the two side panels 24 are respectively arranged on both sides of the battery pack 21 along the third direction Z, and the two ends of the side panels 24 in the first direction X are respectively connected to the two end plates 22, so that the two side panels 24 and the two end plates 22 are enclosed to form an outer frame for assembling the battery pack 21, which is beneficial to improving the integrity and structural stability of the battery module 20.

[0142] According to some embodiments of the present application, the present application further provides a battery 100, and the battery 100 includes a battery module 20 of any of the above solutions.

[0143] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery 100 of any of the above solutions, and the battery 100 is used to provide electrical energy to the electrical device.

[0144] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0145] According to some embodiments of the present application, see Figures 3 to 10As shown, the present application provides a battery module 20, which includes a battery pack 21, two end plates 22, two side plates 24 and two insulating members 23. The battery pack 21 includes a plurality of battery cells 211, and the plurality of battery cells 211 are stacked along a first direction X. The two end plates 22 are respectively arranged on both sides of the battery pack 21 along the first direction X, and avoidance areas 221 are formed at the four corners of the end plates 22. The battery module 20 also includes two side plates 24, which are respectively arranged on both sides of the battery pack 21 along a third direction Z, and the two ends of the side plates 24 in the first direction X are respectively connected to the two end plates 22 to enclose and form an outer frame for accommodating the battery pack 21. The two insulating members 23 are respectively arranged between the battery pack 21 and the two end plates 22 to insulate and isolate the battery pack 21 and the two end plates 22. The insulating member 23 is formed with a corner area 231 at a position corresponding to the avoidance area 221. The insulating member 23 is provided with an adhesive member 25 on the side facing the battery pack 21, and the adhesive member 25 is located at the corner area 231 of the insulating member 23. The adhesive member 25 adheres the corner area 231 of the insulating member 23 and the adjacent battery cells 211 in the battery pack 21. The insulating member 23 is rectangular, and the insulating member 23 is formed with four corner areas 231. The battery module 20 includes four adhesive members 25, and each corner area 231 is connected to the battery pack 21 through an adhesive member 25. Along the first direction X, the insulating member 23 is provided with a groove 232 on the side away from the battery pack 21 and corresponding to the adhesive member 25. The orthographic projection of the adhesive member 25 is located in the groove 232. The thickness of the adhesive member 25 is D1, and the groove depth of the groove 232 is H, satisfying that D1≤H. The insulating member 23 includes a first insulating layer 233 and a second insulating layer 234 which are stacked along the first direction X and have equal thickness. The first insulating layer 233 is located on the side of the second insulating layer 234 facing the battery pack 21. The adhesive member 25 is disposed on the side of the first insulating layer 233 facing the battery pack 21. A notch 2341 is disposed in the region of the second insulating layer 234 corresponding to the adhesive member 25 along the first direction X. The notch 2341 penetrates the second insulating layer 234. The notch 2341 and the surface of the first insulating layer 233 facing the second insulating layer 234 jointly define the groove 232. An adhesive layer 235 is disposed between the first insulating layer 233 and the second insulating layer 234. The adhesive layer 235 adheres the first insulating layer 233 and the second insulating layer 234. The first insulating layer 233 of the insulating member 23 is provided with a flange portion 236 at one end in the second direction Y. The flange portion 236 extends from the side of the first insulating layer 233 facing the battery pack 21 in a direction close to the battery pack 21. The flange portion 236 abuts against the battery pack 21 along the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. Along the first direction X, the thickness of the insulating member 23 is D2, which satisfies 0.4 mm ≤ D2 ≤ 2 mm.

[0146] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0147] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: Battery pack; An end plate is arranged at one side of the battery pack along a first direction, and a avoidance area is formed at a corner of the end plate; as well as an insulating member, disposed between the battery pack and the end plate along the first direction to insulate and isolate the battery pack and the end plate; Wherein, the insulating member forms a corner area at a position corresponding to the avoidance area, and the corner area is fixedly connected to the battery pack.

2. The battery module according to claim 1, characterized in that: The battery module also includes: An adhesive member is disposed between the insulating member and the battery pack, and the adhesive member connects the corner area and the battery pack.

3. The battery module according to claim 2, characterized in that: The insulating member is rectangular and has four corner regions formed thereon. The battery module includes four adhesive members, and each corner region is connected to the battery pack via one adhesive member.

4. The battery module according to claim 2 or 3, characterized in that: Along the first direction, a groove is provided on a side of the insulating member facing away from the battery pack and corresponding to the adhesive member, and an orthographic projection of the adhesive member is located in the groove.

5. The battery module according to claim 4, characterized in that: Along the first direction, the thickness of the adhesive is D1, and the depth of the groove is H, satisfying D1≤H.

6. The battery module according to claim 4, characterized in that: The insulating member includes a first insulating layer and a second insulating layer stacked along the first direction, the first insulating layer is located on a side of the second insulating layer facing the battery pack, and the adhesive member is disposed on a side of the first insulating layer facing the battery pack; Wherein, along the first direction, a notch is provided in the area of ​​the second insulating layer corresponding to the adhesive, the notch penetrates the second insulating layer, and the notch and the surface of the first insulating layer facing the second insulating layer jointly define the groove.

7. The battery module according to claim 6, characterized in that: Along the first direction, the thickness of the first insulating layer is equal to the thickness of the second insulating layer.

8. The battery module according to claim 6 or 7, characterized in that: The insulating member further comprises: An adhesive layer is disposed between the first insulating layer and the second insulating layer along the first direction, and the adhesive layer connects the first insulating layer and the second insulating layer.

9. The battery module according to claim 1, characterized in that: Along the first direction, the thickness of the insulating member is D2, satisfying 0.4 mm ≤ D2 ≤ 2 mm.

10. The battery module according to claim 1, characterized in that: The insulating member is provided with a flange portion at one end in the second direction, the flange portion extends from the side of the insulating member facing the battery pack toward the direction close to the battery pack, the flange portion abuts against the battery pack along the second direction, and the second direction is perpendicular to the first direction.

11. The battery module according to claim 1, characterized in that: The battery pack includes a plurality of battery cells, and the plurality of battery cells are stacked along the first direction.

12. The battery module according to claim 1, characterized in that: The battery module comprises two end plates, and the two end plates are respectively arranged on both sides of the battery pack along the first direction; Wherein, along the first direction, the insulating member is disposed between the two end plates and the battery pack.

13. The battery module according to claim 12, characterized in that: The battery module further includes two side plates, which are respectively arranged on both sides of the battery pack along a third direction, and the two ends of the side plates in the first direction are respectively connected to the two end plates, and the third direction is perpendicular to the first direction.

14. A battery, characterized in that: Comprising a battery module as described in any one of claims 1-13.

15. An electrical device, characterized in that: Comprising a battery as claimed in claim 14, the battery is used to provide electrical energy.

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