Battery module, battery and electrical apparatus

Abstract

The present application belongs to the technical field of batteries. Provided are a battery module, a battery and an electrical apparatus. The battery module comprises a battery pack, an end plate and an insulating member. The end plate is arranged in a first direction on one side of the battery pack, and clearance areas are formed at corners of the end plate. The insulating member is arranged in the first direction between the battery pack and the end plate to insulate the battery pack from the end plate. Corner areas are formed at the positions of the insulating member corresponding to the clearance areas, and the corner areas are fixedly connected to the battery pack. Fixedly connecting to the battery pack the corner areas formed at the insulating member corresponding to the clearance areas of the end plate helps to reduce the phenomenon of warping or separation of the corner areas of the insulating member, such that the structural stability of the insulating member mounted between the end plate and the battery pack can be improved, and the interference effect on an assembly area of the end plate due to warping or separation of the corner areas of the insulating member can also be reduced, thereby reducing the assembly difficulty of the battery module and improving the assembly quality of the battery module.

Description

Battery modules, batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311510477X, filed on November 13, 2023, entitled “Battery Module, Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] 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

[0004] In recent years, new energy vehicles have experienced rapid development. In the electric vehicle sector, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. A battery comprises a housing and multiple battery modules housed within the housing. Each battery module includes multiple battery cells. As a core component of new energy vehicles, batteries have high safety requirements. Consequently, insulating members are installed between the end plates of the battery modules and the multiple battery cells to improve their safety. However, existing battery modules are susceptible to interference from insulating members during assembly, making assembly difficult and resulting in poor quality.

[0005] Summary of the Invention

[0006] 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.

[0007] 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 avoidance area 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 area at a position corresponding to the avoidance area, and the corner area is fixedly connected to the battery pack.

[0008] In the above technical solution, 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, so as 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, the corner area formed by the avoidance area at the corner of the end plate corresponding to the insulating member is fixedly connected to the battery pack, which is beneficial to reducing 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.

[0009] 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.

[0010] 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 adhered 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 this 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.

[0011] In some embodiments, the insulating member is rectangular and has four corner regions formed therein. The battery module includes four adhesive members, and each corner region is connected to the battery pack via one adhesive member.

[0012] In the above technical solution, the insulating part is a rectangular structure, so that the insulating part has four corner areas. By arranging four adhesive parts respectively at the four corner areas, the four corner areas of the insulating part can be bonded to the battery pack through the adhesive parts, thereby further improving the structural stability of the insulating part 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 part.

[0013] 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.

[0014] In the above technical solution, a groove is provided on the side of the insulating part away from the battery pack and in the area corresponding to the adhesive, so that the bulge 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 effect between the bulge formed by the area where the adhesive is provided on the insulating part 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 bulge 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.

[0015] 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.

[0016] 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 of ​​the insulating part where the adhesive is set protruding away from the battery pack after being bonded to the battery pack can be accommodated as a whole 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.

[0017] 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 the side of the second insulating layer facing the battery pack, and the adhesive member is arranged on the 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 the area corresponding to the adhesive member, the notch passes through the second insulating layer, and the notch and the surface of the first insulating layer facing the second insulating layer jointly define the groove.

[0018] In the above technical solution, the insulating part is provided with a first insulating layer and a second insulating layer, and 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 the adhesive part on the side of the first insulating layer facing the battery pack, and setting a notch penetrating the second insulating layer in the area corresponding to the adhesive part on the second insulating layer, the notch can form a groove together with the surface of the first insulating layer facing the second insulating layer, so as to form a groove on the side of the insulating part away from the battery pack and in the area corresponding to the adhesive part. The insulating part with this structure is easy to process and manufacture, which is conducive to reducing the difficulty of setting the groove on the insulating part, thereby effectively improving the production efficiency of the battery module.

[0019] In some embodiments, along the first direction, a thickness of the first insulating layer is equal to a thickness of the second insulating layer.

[0020] 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.

[0021] 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.

[0022] 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. 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 rhythm.

[0023] In some embodiments, along the first direction, the thickness of the insulating member is D2, satisfying 0.4 mm ≤ D2 ≤ 2 mm.

[0024] 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, the insulating member's effectiveness in insulating and isolating the end plate and the battery pack can be improved, thereby reducing the risk of short circuits between the end plate and the battery pack. Furthermore, the insulating member's hardness can be increased, resulting in a better profile for the insulating member, thereby facilitating assembly of the insulating member between the end plate and the battery pack and reducing 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 reduced, thereby improving the space utilization of the battery module and facilitating the improvement of the energy density of the battery module.

[0025] In some embodiments, the insulating member is provided with a flange portion at one end in the second direction, and 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.

[0026] 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 reducing 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 assembly of the insulating part between the end plate and the battery pack.

[0027] In some embodiments, the battery pack includes a plurality of battery cells, and the plurality of battery cells are stacked along the first direction.

[0028] 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 cell, and it is convenient to fix the corner area of ​​the insulating member to the adjacent battery cell, which is beneficial to reduce the difficulty of assembling the insulating member and the battery pack.

[0029] In some embodiments, the battery module includes two end plates, which 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.

[0030] In the above technical solution, the battery module is provided with two end plates, which 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, thereby improving the reliability of the battery module.

[0031] 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.

[0032] In the above technical solution, the battery module is also provided with two side panels, which 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.

[0033] In a second aspect, an embodiment of the present application further provides a battery, comprising the above-mentioned battery module.

[0034] 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

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0036] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0037] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0038] FIG3 is a schematic structural diagram of a battery module provided in some embodiments of the present application;

[0039] FIG4 is an exploded view of the structure of a battery module provided in some embodiments of the present application;

[0040] FIG5 is a schematic structural diagram of an insulating member of a battery module provided in some embodiments of the present application;

[0041] FIG6 is a front view of a side of an insulating member of a battery module facing the battery pack in some embodiments of the present application;

[0042] FIG7 is a front view of a side of an insulating member of a battery module facing away from the battery pack in some embodiments of the present application;

[0043] FIG8 is a front view of an insulating member of a battery module according to some embodiments of the present application in a third direction;

[0044] FIG9 is 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;

[0045] FIG10 is a cross-sectional view of an insulating member of a battery module according to some embodiments of the present application.

[0046] Icon: 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; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0053] The term "plurality" used in this application refers to two or more (including two).

[0054] 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.

[0055] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0056] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0057] In some embodiments, the positive electrode may be a positive electrode sheet, which 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.

[0058] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0059] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0060] In some embodiments, the separator is a separator membrane. There are many types of separator membranes, and any known separator membrane with a porous structure having good chemical stability and mechanical stability can be selected.

[0061] 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.

[0062] In some embodiments, the electrode assembly is a laminate structure.

[0063] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0064] 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.

[0065] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0066] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0067] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0068] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0069] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0070] In some embodiments, a 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 (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0071] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include but are not limited to square-shell, blade-shaped, and polygonal batteries, such as hexagonal batteries.

[0072] 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.

[0073] 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.

[0074] 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 housed in the case.

[0075] 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.

[0076] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0077] Batteries, with their outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient, are a vital component of today's new energy development. The development of battery technology requires simultaneous consideration of multiple design factors, including performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, battery safety must also be considered.

[0078] A typical battery includes a housing and multiple battery modules housed within the housing. The battery modules include multiple stacked battery cells and side panels and end panels surrounding the multiple battery cells. The end panels have escape areas formed at their corners, each of which has through-holes for locking bolts. Since the end panels are made of conductive metal, in order to improve the safety of the battery module, an insulating member is typically sandwiched between the end panels and the multiple battery cells. This insulating member can insulate and isolate the end panels from the battery cells, thereby reducing the risk of short circuits between the battery cells and the end panels. However, the insulating member of a battery module with this structure is prone to warping at the four corners corresponding to the escape areas of the end panels. This, on the one hand, results in poor assembly quality of the insulating member. Furthermore, the warped insulating member can easily interfere with the bolt-locking assembly area of ​​the end panels of the battery module, making assembly of the battery module more difficult and resulting in poor assembly quality.

[0079] Based on the above considerations, in order to solve the problem of difficulty and poor assembly quality during the assembly of the battery module, 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 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. A corner zone is formed at the position of the insulating member corresponding to the escape zone, and the corner zone is fixedly connected to the battery pack.

[0080] 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, so as 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.

[0081] The battery modules disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery modules and batteries disclosed in this application can be used to construct such electrical devices. This helps alleviate the problem of the corners of the battery module's insulating components easily warping and interfering with other assembly areas, thereby reducing the difficulty of battery module assembly and improving the assembly quality of the battery module.

[0082] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. 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. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0083] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0084] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 can be arranged 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 can be used to power the vehicle 1000. For example, the battery 100 can be used as an operating power source or a power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0085] In some embodiments of the present application, the battery 100 can not only serve as the operating power source or usage power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Please refer to Figures 2 and 3. Figure 2 is an exploded view of the structure of a battery 100 provided in some embodiments of the present application, and Figure 3 is a schematic diagram of the structure of a battery module 20 provided in some embodiments of the present application. The battery 100 includes a housing 10 and a battery module 20, which is accommodated in the housing 10.

[0087] The housing 10 is used to provide an assembly space for the battery module 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first housing body 11 and a second housing body 12, which cover each other and together define an assembly space for accommodating the battery module 20. The second housing body 12 can be a hollow structure with one end open, and the first housing body 11 can be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 jointly define the assembly space. The first housing body 11 and the second housing body 12 can also be hollow structures with one end open, with the open side of the first housing body 11 covering the open side of the second housing body 12.

[0088] 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, etc. For example, in FIG2 , the box body 10 is in the shape of a cuboid.

[0089] In the battery 100, there can be one or more battery modules 20. For example, in FIG2 , the battery 100 includes multiple battery modules 20. The multiple battery modules 20 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to multiple battery modules 20 being connected in both series and parallel. The multiple battery modules 20 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery modules 20 is housed within the housing 10. The battery 100 may also include conductive members (copper or aluminum bars, etc.) for achieving electrical connections between the multiple battery modules 20.

[0090] According to some embodiments of the present application, with reference to FIG3 , and further with reference to FIG4 and FIG5 , FIG4 is an exploded view of the structure of the battery module 20 provided in some embodiments of the present application, and FIG5 is a schematic structural diagram 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, which 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 avoidance 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. The insulating member 23 is formed with a corner area 231 at the position corresponding to the avoidance area 221, and the corner area 231 is fixedly connected to the battery pack 21.

[0091] The battery pack 21 is a component in the battery module 20 that provides electrical energy. For example, in Figures 3 and 4 , 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 include only one battery cell 211 .

[0092] In the battery pack 21 , multiple battery cells 211 may be connected in series, in parallel, or in a mixed manner. The battery pack 21 may also include other structures, for example, the battery pack 21 may further include a busbar component for connecting the multiple battery cells 211 to achieve electrical connection between the multiple battery cells 211 .

[0093] Each battery cell 211 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 211 can be a rectangular parallelepiped, a prism, or other shapes. For example, in Figures 3 and 4 , the battery cell 211 is a rectangular parallelepiped.

[0094] 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.

[0095] 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. The escape area 221 of the end plate 22 is used for locking bolts, etc.

[0096] 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 for accommodating and assembling the battery pack 21). The two end plates 22 are spaced apart and arranged opposite to each other along a first direction X (i.e., the length of the battery module 20), and the second direction Y is the height direction of the battery module 20. The two side plates 24 are spaced apart and arranged opposite to each other along a third direction Z (i.e., the width of the battery module 20). The two side plates 24 and the two end plates 22 enclose a storage space for accommodating the battery cells 211. In other words, 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, thereby accommodating the battery pack 21. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0097] Optionally, the battery module 20 includes two insulating members 23 . Along the first direction X, an insulating member 23 is provided between the two end plates 22 and the battery pack 21 .

[0098] 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.

[0099] 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 various materials, such as polyethylene, polypropylene, or polyvinyl chloride.

[0100] 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 of ​​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 .

[0101] 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.

[0102] 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 of the corner area 231 of the insulating member 23 being lifted 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.

[0103] According to some embodiments of the present application, referring to Figures 4 and 5, and further referring to Figure 6, Figure 6 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 region 231 and the battery pack 21.

[0104] Among them, the adhesive member 25 is arranged between the insulating member 23 and the battery pack 21, that is, the adhesive member 25 is arranged on the side of the insulating member 23 facing the battery pack 21, and the adhesive member 25 is located in the corner area 231 of the insulating member 23, so that the adhesive member 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.

[0105] Exemplarily, the adhesive member 25 may be glue, double-sided tape, or sponge adhesive, etc., which is provided on the side of the insulating member 23 facing the battery pack 21 .

[0106] By arranging 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 adhered 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 adopting 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.

[0107] In some embodiments, please continue to refer to Figures 4, 5 and 6. The insulating member 23 is rectangular and has four corner areas 231. The battery module 20 includes four adhesive members 25. Each corner area 231 is connected to the battery pack 21 through an adhesive member 25.

[0108] 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.

[0109] The insulating member 23 has a rectangular structure, so that the insulating member 23 forms four corner areas 231. By respectively arranging 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 arranged between the end plate 22 and the battery pack 21, and effectively alleviating the phenomenon of the four corner areas 231 of the insulating member 23 being warped or detached.

[0110] According to some embodiments of the present application, referring to Figures 4, 5, and 6, and further referring to Figures 7 and 8, Figure 7 is a front view of the insulating member 23 of the battery module 20 of some embodiments of the present application, facing away from the battery pack 21, and Figure 8 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 within the groove 232.

[0111] Among them, a groove 232 is provided on the side of the insulating part 23 facing away from the battery pack 21 and corresponding to the area of ​​the adhesive part 25, that is, a groove 232 is provided on the side of the corner area 231 of the insulating part 23 facing away from the battery pack 21 in the first direction X, and the positive projection of the adhesive part 25 in the first direction X is located in the groove 232, that is, the bottom surface of the groove 232 covers the adhesive part 25 in the first direction X.

[0112] For example, in FIG. 5 and FIG. 7 , the groove 232 extends to the edge of the insulating member 23 in both the second direction Y and the third direction Z. As shown in FIG.

[0113] 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 bulge 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 effect between the bulge 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 bulge formed on 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.

[0114] According to some embodiments of the present application, as shown in FIG. 8 , along the first direction X, the thickness of the adhesive 25 is D1 , and the depth of the groove 232 is H, satisfying D1 ≤ H.

[0115] Among them, the thickness of the adhesive 25 is less than or equal to the 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.

[0116] 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 part 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 part 23 due to the setting of the adhesive 25 on the assembly area of ​​the end plate 22.

[0117] According to some embodiments of the present application, referring to Figures 5, 6, 7, and 8, and further referring to Figure 9, Figure 9 is a schematic structural diagram of the second insulating layer 234 of the insulating member 23 of the battery module 20 in 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 provided in the second insulating layer 234 in an area 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.

[0118] 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, a 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.

[0119] 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 member 25 through processes such as extrusion molding or cutting.

[0120] The insulating member 23 is provided with a first insulating layer 233 and a second insulating layer 234. 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 member 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 member 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 member 25. The insulating member 23 with this structure is easy to process and manufacture, which is beneficial to reduce the difficulty of setting the groove 232 on the insulating member 23, thereby effectively improving the production efficiency of the battery module 20.

[0121] In some embodiments, as shown in FIG. 8 , along the first direction X, the thickness of the first insulating layer 233 is equal to the thickness of the second insulating layer 234 .

[0122] By setting the first insulating layer 233 and the second insulating layer 234 of the insulating part 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 part 23.

[0123] According to some embodiments of the present application, please refer to FIG10, which is a cross-sectional view of an insulating member 23 of a battery module 20 in some embodiments of the present application. The insulating member 23 may further include an adhesive layer 235, which is disposed between the first insulating layer 233 and the second insulating layer 234 along the first direction X. The adhesive layer 235 connects the first insulating layer 233 and the second insulating layer 234.

[0124] Among them, the adhesive layer 235 serves to bond the first insulating layer 233 and the second insulating layer 234. The structure of the adhesive layer 235 can be various. For example, the adhesive layer 235 can also be glue, double-sided tape, etc. arranged between the first insulating layer 233 and the second insulating layer 234.

[0125] 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.

[0126] By setting an adhesive layer 235 between the first insulating layer 233 and the second insulating layer 234, 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. 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 rhythm.

[0127] According to some embodiments of the present application, please continue to refer to FIG. 10 , along the first direction X, the thickness of the insulating member 23 is D2 , satisfying 0.4 mm ≤ D2 ≤ 2 mm.

[0128] For example, 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.

[0129] It should be noted that in an 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.

[0130] By setting the thickness of the insulating member 23 in the first direction X to be greater than or equal to 0.4 mm, the insulating member 23 can be improved in its ability to insulate and isolate the end plate 22 and the battery pack 21, thereby reducing the risk of short circuits between the end plate 22 and the battery pack 21. Furthermore, the insulating member 23 can be made harder, providing it with a better profile, thereby facilitating its assembly between the end plate 22 and the battery pack 21 and reducing 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 is reduced, thereby improving the space utilization of the battery module 20 and facilitating an increase in the energy density of the battery module 20.

[0131] According to some embodiments of the present application, referring to Figures 5, 8 and 10, 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.

[0132] The second direction Y is the height direction of the battery module 20 , the height direction of the battery cell 211 , and the assembly direction of the insulating member 23 between the end plate 22 and the battery pack 21 .

[0133] 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 that protrudes along the first direction X toward the battery pack 21 and protrudes from the side of the insulating member 23 facing the battery pack 21 .

[0134] It should be noted that in embodiments 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 beyond the side of the first insulating layer 233 facing the battery pack 21, such that the flange portion 236 and the first insulating layer 233 form an "L"-shaped structure. For example, in FIG8 , the dimension of the flange portion 236 protruding beyond the side of the first insulating layer 233 facing the battery pack 21 is greater than the thickness of the adhesive member 25 in the first direction X. In other words, the flange portion 236 extends beyond the side of the adhesive member 25 facing the battery pack 21 along the first direction X, so that the flange portion 236 can abut against the battery pack 21. For example, in Figures 8 and 10, 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.

[0135] 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 abut against the battery pack 21 in the second direction Y. On the one hand, the insulating member 23 with this structure can 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. 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.

[0136] According to some embodiments of the present application, as shown in Figures 3 and 4 , a battery pack 21 may include a plurality of battery cells 211 , which 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.

[0137] The battery pack 21 is provided with a plurality of battery cells 211, and the plurality of battery cells 211 are stacked along the 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.

[0138] According to some embodiments of the present application, as shown in Figures 3 and 4 , a battery module 20 may include two end plates 22 , which are respectively disposed on both sides of a battery pack 21 along a 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 .

[0139] Exemplarily, the end plate 22 is made of metal.

[0140] 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 that the battery pack 21 can be clamped and assembled. 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, thereby improving the reliability of the battery module 20.

[0141] In some embodiments, please continue to refer to Figures 3 and 4. The battery module 20 may also include two side panels 24, which are respectively arranged on both sides of the battery pack 21 along the third direction Z. The two ends of the side panels 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.

[0142] 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 .

[0143] Exemplarily, the side panels 24 are made of insulating and heat-isolating materials, such as rubber, plastic, or mica.

[0144] The battery module 20 is also provided with two side panels 24, which 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 panels 22, so that the two side panels 24 and the two end panels 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.

[0145] According to some embodiments of the present application, the present application further provides a battery 100, which includes the battery module 20 of any of the above solutions.

[0146] 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.

[0147] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0148] According to some embodiments of the present application, as shown in Figures 3 to 10, 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, which 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 each of the four corners of the end plates 22 has an avoidance area 221 formed therein. 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. 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 from the two end plates 22. Corner regions 231 are formed on the insulating member 23 at locations corresponding to the avoidance regions 221. Adhesive members 25 are provided on the side of the insulating member 23 facing the battery pack 21, and are located in the corner regions 231 of the insulating member 23. Adhesive members 25 bond the corner regions 231 of the insulating member 23 to adjacent battery cells 211 in the battery pack 21. The insulating member 23 is rectangular and has four corner regions 231. The battery module 20 includes four adhesive members 25, with each corner region 231 connected to the battery pack 21 via an adhesive member 25. 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, corresponding to the region of the adhesive member 25. The orthographic projection of the adhesive member 25 is located within the groove 232. The thickness of the adhesive member 25 is D1, and the depth of the groove 232 is H, satisfying the condition D1 ≤ H. The insulating member 23 includes a first insulating layer 233 and a second insulating layer 234 of equal thickness, 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. 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 provided in the second insulating layer 234 corresponding to the adhesive member 25. 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 a groove 232. An adhesive layer 235 is disposed between the first insulating layer 233 and the second insulating layer 234 to bond the first insulating layer 233 and the second insulating layer 234. A flange portion 236 is provided at one end of the first insulating layer 233 of the insulating member 23 in the second direction Y. The flange portion 236 extends from the side of the first insulating layer 233 facing the battery pack 21 toward 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. The thickness of the insulating member 23 along the first direction X is D2, satisfying the condition 0.4 mm ≤ D2 ≤ 2 mm.

[0149] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0150] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, comprising: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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 or 5, wherein: 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, wherein: 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, wherein: 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 any one of claims 1 to 8, wherein: 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 any one of claims 1 to 9, wherein: 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 any one of claims 1 to 10, wherein: 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 any one of claims 1 to 11, wherein: The battery module comprises two end plates, which 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, wherein: 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, comprising the battery module according to any one of claims 1 to 13.

15. An electrical device comprising the battery according to claim 14, wherein the battery is used to provide electrical energy.

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