Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and solves the problem that an upper box body and an electrified body of a battery monomer are easy to generate electric appliance ignition. The battery device includes: a battery cell assembly including a plurality of battery cells having electrode terminals; the box body comprises a first part and a second part, the second part covers the first part to form an accommodating cavity for accommodating the battery monomer assembly, a first surface of the second part is provided with a convex part and / or an opening part, and the first surface is a surface, facing the electrode terminal, of the second part; and an insulator between the first surface of the second portion and the battery cell assembly. The insulating part comprises a first insulating part and a second insulating part; the first insulating part is arranged opposite to the first surface of the second part, and is provided with a hollow part for exposing the convex part and / or the opening part; the second insulating part is arranged opposite to the protruding part, and / or the second insulating part is arranged opposite to the part, exposed through the hollow part, of the first surface, and the second insulating part is provided with a first through hole communicated with the opening part.

Description

Technical Field

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

[0002] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. The battery device can be a power battery, and the battery device can also be an energy storage battery.

[0003] The battery device includes an upper box, a lower box and a battery cell; the upper box is covered on the lower box to accommodate the battery cell. The charged parts of the upper box and the battery cell may spark, causing thermal runaway of the battery cell, and then causing safety accidents such as explosion of the battery device. Utility Model Content

[0004] The main technical problem solved by the present application is to provide a battery device and electrical equipment to solve the problem that the charged parts of the upper box and the battery cells are prone to electrical ignition.

[0005] To solve the above technical problems, the first technical solution adopted in the present application is: to provide a battery device, the battery device includes a battery cell assembly, a box and an insulating member; the battery cell assembly includes a plurality of battery cells, and the battery cells have electrode terminals; the box includes a first part and a second part; the second part covers the first part to form a accommodating cavity for accommodating the battery cell assembly; the first surface of the second part has a protrusion and / or an opening; the first surface is the surface of the second part facing the electrode terminal; the insulating member is located between the first surface of the second part and the battery cell assembly; wherein the insulating member includes a first insulating member and a second insulating member; the first insulating member is arranged opposite to the first surface of the second part, and the first insulating member has a hollow portion, and the hollow portion exposes the protrusion and / or the opening; the second insulating member is arranged opposite to the protrusion, and / or the second insulating member is arranged opposite to the portion of the first surface exposed through the hollow portion, and has a first through hole connected to the opening.

[0006] In this embodiment, the first insulating member is arranged opposite to the portion of the first surface excluding the protrusion and / or the opening, and the second insulating member is arranged opposite to the protrusion and / or the opening on the first surface, thereby improving the insulation protection capability of the second portion, reducing the probability of electrical ignition between the charged body of the battery cell assembly and the second portion, reducing the probability of thermal runaway of the battery device, and thereby improving the reliability of the battery device.

[0007] In some embodiments, there is an overlapping area between an edge of the first insulating member and an edge of the second insulating member; and the edge of the second insulating member is located between the edge of the first insulating member and the first surface.

[0008] In this embodiment, there is an overlapping area between the edge of the first insulating member and the edge of the second insulating member, and the edge of the second insulating member is located between the edge of the first insulating member and the first surface, which can enhance the firmness of the connection between the first insulating member and the second insulating member, thereby reducing the probability of the second insulating member detaching from the protrusion and / or the opening; at the same time, it also solves the problem of the gap between the first insulating member and the second insulating member, thereby further improving the insulation protection capability of the second part, further reducing the probability of electrical ignition between the charged body of the battery cell assembly and the second part, and further reducing the probability of thermal runaway of the battery device.

[0009] In some embodiments, the width of the overlapping area is greater than or equal to 2 mm.

[0010] In some embodiments, the second insulating member includes a first covering portion covering the side of the protrusion facing the battery cell assembly, a second covering portion located on the portion of the first surface exposed by the hollow portion and spaced apart from the protrusion, and a connecting portion connecting the first covering portion and the second covering portion, and the connecting portion is suspended; or, the second insulating member includes a first covering portion covering the side of the protrusion facing the battery cell assembly, a second covering portion located on the portion of the first surface exposed by the hollow portion and in contact with the protrusion, and a third covering portion located on the side of the protrusion.

[0011] In this embodiment, the second insulating member includes a first covering portion, a connecting portion and a second covering portion, which can reduce the difficulty of installing the second insulating member. The second insulating member includes a first covering portion, a third covering portion and a second covering portion, which can increase the protection capability of the second insulating member.

[0012] In some embodiments, the raised portion includes a plurality of reinforcing ribs, which extend from one side of the first surface of the second portion to the other opposite side and divide the first surface into a plurality of sub-surfaces; the first insulating member includes a plurality of first insulating sub-members, one first insulating sub-member covers one sub-surface, and a hollow portion for exposing the reinforcing ribs is formed between two adjacent first insulating sub-members; the number of the second insulating members is multiple, and one second insulating member covers one reinforcing rib.

[0013] In this embodiment, the provided reinforcing ribs can increase the strength of the second portion, and the second insulating member covers the reinforcing ribs, which can reduce the probability of electrical sparks between the reinforcing ribs and the charged body, thereby improving the reliability of the battery device.

[0014] In some embodiments, the battery device also includes a mounting member and a connecting member; the mounting member is arranged in the first part; the opening portion is a mounting hole that passes through the second part; the first through hole exposes the mounting hole; the second part covers the first part, and the connecting member passes through the mounting hole and the first through hole from outside the second part and then connects to the mounting member.

[0015] In this embodiment, the mounting member and the connecting member can enhance the firmness of the connection between the first part and the second part. The second insulating member covers the mounting hole, which can reduce the probability of electrical sparks between the mounting hole and the charged body, thereby improving the reliability of the battery device.

[0016] In some embodiments, the first insulating member is an integrally molded structure; the hollow portion used to expose the mounting hole is a second through hole; there is an overlapping area between the edge of the second through hole of the first insulating member and the outer edge of the second insulating member; the outer edge of the second insulating member is located between the edge of the second through hole of the first insulating member and the first surface.

[0017] In this embodiment, the first insulating member is an integrally formed structure, which can facilitate the first insulating member to be disposed on the first surface.

[0018] In some embodiments, the first insulating member includes two sub-insulating members; the two sub-insulating members are spaced apart to form a hollow portion for exposing the mounting hole.

[0019] In this embodiment, the two sub-insulating members are provided, which can reduce the difficulty of installing the second insulating member and make the installation more flexible.

[0020] In some embodiments, the battery device also includes a sleeve, which is arranged between the mounting member and the first surface; the sleeve has a third through hole for the connecting member to pass through; the edge of the first through hole of the second insulating member is at least located on the side of the outer edge of the sleeve away from the first surface.

[0021] In this embodiment, the provided gasket can reduce the probability of the connector and the mounting member being loose. The edge of the first through hole of the second insulating member is at least located on the side of the outer edge of the bushing away from the first surface, which can reduce the portion of the first through hole of the second insulating member that exposes the bushing, thereby reducing the probability of electrical ignition between the bushing and the charged body, thereby improving the reliability of the battery device.

[0022] In some embodiments, the compliance coefficient of the first insulating member is less than the compliance coefficient of the second insulating member.

[0023] In this embodiment, the flexibility coefficient of the first insulating member is smaller than the flexibility coefficient of the second insulating member, so that the second insulating member can be more conveniently disposed at the protruding portion and the opening portion.

[0024] In some embodiments, the first insulating member includes a mica board or a polypropylene insulating film; and the second insulating member includes a spray-coated insulating layer or mica paper.

[0025] In this embodiment, the first insulating member includes a mica board or a polypropylene insulating film; the second insulating member includes a sprayed insulating layer or mica paper, which can reduce the cost of the first insulating member and the second insulating member.

[0026] In some embodiments, the first insulating member covers the first surface of the second portion; the second insulating member covers the protrusion, and / or the second insulating member covers a portion of the first surface exposed by the hollow portion.

[0027] In this embodiment, the insulating member and the second part can be integrated into one body by covering each other, so as to facilitate assembly with the first part.

[0028] In order to solve the above technical problems, the second technical solution provided by the present application is to provide an electric device, the electric device includes the above battery device and an electric component, and the electric component is electrically connected to the battery device. Since the electric device includes the above battery device, the electric device has the same effect as the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural schematic diagram of the electrical equipment provided by this application;

[0031] Figure 2 is a schematic diagram of the structure of the battery device provided by the present application;

[0032] Figure 3 is a bottom view of a second part provided by the present application;

[0033] Figure 4 yes Figure 3 A bottom view of the second portion of the insulating member;

[0034] Figure 5 is a bottom view of another second part provided by the present application;

[0035] Figure 6 yes Figure 5 A bottom view of the second portion of the insulating member;

[0036] Figure 7 is a bottom view of another second part provided by the present application;

[0037] Figure 8 yes Figure 7 A bottom view of the second portion of the insulating member;

[0038] Fig. 9 yes Figure 8 The cross-sectional view at line BB;

[0039] Fig.10 It is a schematic diagram of the structure of a battery cell provided in this application;

[0040] Fig.11 is a top view of the battery device provided by the present application;

[0041] Fig.12 It is a structural schematic diagram of the first part provided by this application;

[0042] Fig.13 yes Fig.11 The cross-sectional view at line AA;

[0043] Fig.14 is a structural schematic diagram of a first insulating member provided by the present application;

[0044] Fig.15 It is a schematic structural diagram of another first insulating member provided in the present application.

[0045] In the figure: 1, battery device; 11, box; 111, second part; 1111, first surface; 11111, sub-surface; 1112, raised part; 11121, reinforcing rib; 1113, opening; 11131, mounting hole; 112, first part; 12, battery cell; 121, connecting member; 122, cover plate; 123, pole; 124, safety valve; 125, electrode assembly; 126, shell; 13, connecting member; 14, partition beam; 15, mounting member; 16, insulator Edge member; 161, first insulating member; 1611, hollow portion; 16111, second hollow portion; 16112, first hollow portion; 1623, first through hole; 1613, sub-insulating member; 1614, first insulating sub-member; 162, second insulating member; 1621, second insulating portion; 1622, first insulating portion; 1624, first covering portion; 1625, connecting portion; 1627, second covering portion; 17, bushing; 171, third through hole; 18, battery cell assembly; 2, electrical components. DETAILED DESCRIPTION

[0046] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0047] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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 technicians in this field without making creative work are within the scope of protection of this application.

[0049] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices can be power batteries, which are power sources for tools. Power batteries mostly refer to batteries that provide power for electric vehicles, electric trains, electric bicycles, golf carts and other transportation vehicles, as well as aerospace. Of course, battery devices can also be energy storage batteries, which refer to batteries used to store energy from renewable energy sources such as hydropower, thermal power, wind power and solar power stations. With the continuous expansion of the application fields of battery devices, the market demand is also constantly expanding.

[0052] The battery device may include an upper case, a lower case and a battery cell; the upper case covers the lower case to accommodate the battery cell.

[0053] Reinforcement ribs are arranged on the inner surface of the upper box, and an insulating structure (such as mica sheets) is arranged on the inner surface of the upper box between two adjacent reinforcement ribs. Since no insulating structure is arranged on the reinforcement ribs, the insulation of the reinforcement ribs of the upper box is poor; the reinforcement ribs and the charged parts of the battery cells (such as poles) are prone to electrical ignition, thereby causing thermal runaway of the battery cells, and further causing safety accidents such as explosion of the battery device.

[0054] A through hole is provided on the inner surface of the upper box, and a mounting part is provided in the lower box. After the upper box and the lower box are covered, the connector passes through the through hole from outside the upper box and is connected to the mounting part. Since the insulating structure exposes the part of the inner surface of the upper box at the through hole, the insulation of the upper box is poor; the part of the inner surface of the upper box exposed by the insulating structure and the charged part of the battery cell (such as the pole) are prone to electrical ignition, thereby causing thermal runaway of the battery cell, and further causing safety accidents such as explosion of the battery device.

[0055] In order to solve the problem that the charged body of the upper case and the battery cell is prone to electrical ignition, an embodiment of the present application provides a battery device, which includes a battery cell assembly, a case and an insulating member; the battery cell assembly includes a plurality of battery cells, and the battery cells have electrode terminals; the case includes a first part and a second part; the second part covers the first part to form a accommodating cavity for accommodating the battery cell assembly; the first surface of the second part has a protrusion and / or an opening; the first surface is the surface of the second part facing the electrode terminal; the insulating member is located between the first surface of the second part and the battery cell assembly; wherein the insulating member includes a first insulating member and a second insulating member; the first insulating member is arranged opposite to the first surface of the second part, and the first insulating member has a hollow portion, and the hollow portion exposes the protrusion and / or the opening; the second insulating member is arranged opposite to the protrusion, and / or the second insulating member is arranged opposite to the portion of the first surface exposed by the hollow portion, and has a first through hole connected to the opening. The first insulating member is arranged opposite to the portion of the first surface excluding the protrusion and / or the opening, and the second insulating member is arranged opposite to the protrusion and / or the opening on the first surface, thereby improving the insulation protection capability of the second portion, reducing the probability of electrical ignition between the charged body of the battery cell assembly and the second portion, reducing the probability of thermal runaway of the battery device, and thereby improving the reliability of the battery device.

[0056] The embodiment of the present application provides an electrical device, see Figure 1 The electric device may include a device body and a battery device, wherein the battery device is arranged in the device body. The battery device is used to supply power to the electric components of the device body so that the device body can work.

[0057] An electrical device may be an element that can consume electricity; for example, an electrical device may be a controller and an electronic component, etc. The controller may be a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0058] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. For the convenience of explanation, the following embodiments are described by taking the electric equipment as a vehicle as an example.

[0059] In some examples, the electric device may be a vehicle, the device body may be a frame, and the battery device may be mounted on the frame. The electric device may be a lamp (e.g., headlight, taillight, etc.), a display screen, a dashboard, a control system (e.g., a controller), etc. of the vehicle. The electric device is mounted on the vehicle body.

[0060] The embodiment of the present application provides a battery device, see Figure 2~Figure 9The battery device 1 includes a battery cell assembly 18, a box 11 and an insulating member 16; the battery cell assembly 18 includes a plurality of battery cells 12, and the battery cells 12 have electrode terminals; the box 11 includes a first portion 112 and a second portion 111; the second portion 111 covers the first portion 112 to form a receiving cavity for receiving the battery cell assembly 18; the first surface 1111 of the second portion 111 has a protrusion 1112 and / or an opening 1113; the first surface 1111 is a surface of the second portion 111 facing the electrode terminal; the insulating member 16 is located on the first surface 111 of the second portion 111 111 and the battery cell assembly 18; wherein the insulating member 16 includes a first insulating member 161 and a second insulating member 162; the first insulating member 161 is arranged opposite to the first surface 1111 of the second portion 111, and the first insulating member 161 has a hollow portion 1611, and the hollow portion 1611 exposes the protrusion 1112 and / or the opening 1113; the second insulating member 162 is arranged opposite to the protrusion 1112, and / or the second insulating member 162 is arranged opposite to the portion of the first surface 1111 exposed by the hollow portion 1611, and has a first through hole 1623 connected to the opening 1113.

[0061] In some examples, the first insulating member 161 covers the first surface 1111 of the second portion 111 ; the second insulating member 162 covers the protrusion 1112 , and / or the second insulating member 162 covers a portion of the first surface 1111 exposed by the hollow portion 1611 .

[0062] In other examples, the first insulating member 161 covers a first sub-surface of the surface of the battery cell assembly 18 close to the first surface 1111, and the first sub-surface is arranged opposite to the first surface 1111. The second insulating member 162 covers a second sub-surface of the surface of the battery cell assembly 18 close to the first surface 1111, and the second sub-surface is arranged opposite to the protrusion 1112, and / or the second insulating member 162 covers a third sub-surface of the surface of the battery cell assembly 18 close to the first surface 1111, which is exposed through the hollow portion 1611.

[0063] Hereinafter, the first insulating member 161 covers the first surface 1111 of the second portion 111 ; the second insulating member 162 covers the protrusion 1112 , and / or the second insulating member 162 covers the portion of the first surface 1111 exposed by the hollow portion 1611 , as an example for explanation.

[0064] The first insulating member 161 covers the first surface 1111 of the second portion 111 . It can be understood that the first insulating member 161 covers a portion of the first surface 1111 excluding the protrusion 1112 and / or the opening 1113 .

[0065] The hollow portion 1611 may include a first hollow portion 16112 and / or a second hollow portion 16111 , the first hollow portion 16112 exposing the protrusion 1112 , and the second hollow portion 16111 exposing the opening 1113 .

[0066] The second insulating member 162 may include a first insulating portion 1622 and / or a second insulating portion 1621, wherein the first insulating portion 1622 is disposed opposite to the protruding portion 1112; the second insulating portion 1621 is disposed opposite to the portion of the first surface 1111 exposed through the hollow portion 1611 (i.e., the second hollow portion 16111), and has a first through hole 1623 communicating with the opening 1113. In some examples, the first insulating portion 1622 covers the protruding portion 1112; the second insulating portion 1621 covers the portion of the first surface 1111 exposed through the hollow portion 1611 (i.e., the second hollow portion 16111), and has a first through hole 1623 communicating with the opening 1113.

[0067] The first insulating portion 1622 is matched with the protrusion 1112, for example, the protrusion 1112 is a reinforcing rib 11121, and the first insulating portion 1622 is a slender structure. The second insulating portion 1621 is matched with the opening 1113, for example, the opening 1113 is a through hole, and the second insulating portion 1621 is a ring structure.

[0068] For some examples, see Figure 3 and Figure 4 , the first surface 1111 of the second part 111 has only an opening 1113, at this time the hollow part 1611 (i.e. the second hollow part 16111) exposes the opening 1113, the second insulating member 162 (i.e. the second insulating part 1621) covers the part of the first surface 1111 exposed by the hollow part 1611 (i.e. the second hollow part 16111), and has a first through hole 1623 connected to the opening 1113. Among them, the opening 1113 can be understood as a structure with an opening on the first surface 1111, the opening can extend to penetrate the second part 111, at this time the opening 1113 can be called a through hole; the opening can also extend to not penetrate the second part 111, at this time the opening 1113 can be called a recessed groove. The opening 1113 can include at least one of a through hole, a recessed groove, etc. For example, the opening 1113 is a mounting hole 11131, and the second hollow part 16111 is a second through hole. The second hollow portion 16111 (ie, the second through hole) exposes the first through hole 1623 and the mounting hole 11131 , and the first through hole 1623 exposes the mounting hole 11131 .

[0069] For other examples, see Figure 5 and Figure 6, the first surface 1111 of the second part 111 has only the protrusion 1112, at this time the hollow portion 1611 (i.e. the first hollow portion 16112) exposes the protrusion 1112, and the second insulating member 162 (i.e. the first insulating portion 1622) covers the protrusion 1112. The protrusion 1112 can be understood as a structure protruding from the first surface 1111, and the protrusion 1112 can include at least one of a reinforcing rib 11121, a bump, etc. For example, the protrusion 1112 is a reinforcing rib 11121.

[0070] For other examples, see Figure 7~Figure 9 , the first surface 1111 of the second part 111 has a protrusion 1112 and an opening 1113, at which time the hollow portion 1611 exposes the protrusion 1112 and the opening 1113 (i.e., the second hollow portion 16111 exposes the opening 1113, and the first hollow portion 16112 exposes the protrusion 1112); the second insulating member 162 (i.e., the first insulating portion 1622) covers the protrusion 1112; the second insulating member 162 (i.e., the second insulating portion 1621) also covers the portion of the first surface 1111 exposed by the hollow portion 1611, and has a first through hole 1623 connected to the opening 1113. For example, the protrusion 1112 and the opening 1113 are staggered.

[0071] In some examples, the first insulating member 161 may be an integrally formed structure, and the first insulating member 161 defines a second hollow portion 16111 and a first hollow portion 16112. In other examples, the first insulating member 161 includes a plurality of first insulating sub-members, a first hollow portion 16112 may be formed between two adjacent first insulating sub-members 1614, and the first insulating sub-member 1614 defines a second hollow portion 16111.

[0072] The first insulating member 161 may be a flat structure such as a plate or a sheet. The second insulating member 162 may be a flat structure such as a sheet or a paper. For example, the first insulating member 161 may be a plate, and the second insulating member 162 may be a paper. The material of the first insulating member 161 is an insulating material, and the material of the second insulating member 162 is an insulating material. The insulating material may be an organic insulating material, such as plastic, rubber, etc.; the insulating material may be an inorganic insulating material, such as ceramic, glass, mica, etc. In some examples, the flexibility coefficient of the first insulating member 161 is the same as the flexibility coefficient of the second insulating member 162. In other examples, the flexibility coefficient of the first insulating member 161 is less than the flexibility coefficient of the second insulating member 162. Among them, the flexibility coefficient is used to describe the deformation capacity of a structure when subjected to an external force, and is usually expressed as the displacement or deformation of the structure under a unit external force. The first insulating member 161 and the second insulating member 162 may be partially overlapped, and the first insulating member 161 and the second insulating member 162 may also be in contact with each other.

[0073] The first surface 1111 is the surface of the second portion 111 facing the electrode terminal. It can be understood that the first surface 1111 is the inner surface of the second portion 111 .

[0074] The box 11 has a receiving cavity; the second part 111 covers the first part 112 to form the receiving cavity. One or more battery cell assemblies 18 are received in the receiving cavity. The box 11 can protect the battery cell assemblies 18 and also facilitate the collection of multiple battery cell assemblies 18. In some examples, the box 11 can include a lower box and an upper box, for example, the first part 112 can be a lower box, and the second part 111 can be an upper box; for another example, the first part 112 can be an upper box, and the second part 111 can be a lower box.

[0075] In some examples, the first insulating member 161 is disposed opposite to the charged body of the battery cell assembly 18 , and the second insulating member 162 is disposed staggered with the charged body of the battery cell assembly 18 .

[0076] The electrode terminals of the battery cell 12 may be poles 123, pole ears, etc. In some examples, the battery cell assembly 18 may include only a plurality of battery cells. In this case, the charged body of the battery cell assembly 18 may be the electrode terminal of the battery cell 12. In other examples, the battery cell assembly 18 may include a plurality of battery cells; it may also include a top plate, a bottom plate, two end plates, and two side plates. A plurality of battery cells 12 are arranged in a space enclosed by a top plate, a bottom plate, two end plates, and two side plates; in this case, the top plate, the bottom plate, the two end plates, the two side plates, and a plurality of battery cells 12 may constitute a battery module; the charged body of the battery cell assembly 18 may be a bar of the battery module, etc., and the bar is electrically connected to the electrode terminal of the battery cell 12.

[0077] The battery cell 12 may be a secondary battery, which refers to a battery cell 12 that can be continuously used by activating active materials by charging after the battery cell 12 is discharged. The battery cell 12 may include, but is not limited to, 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 metal hydride battery, a nickel cadmium battery, a lead storage battery, and the like.

[0078] See also Fig.10 The battery cell 12 may include a housing 126, an electrode assembly 125, and a cover plate 122. The housing 126 has a connected cavity and a mounting port. The number of electrode assemblies 125 may be one or more; the electrode assembly 125 is mounted in the cavity of the housing 126. The cover plate 122 is connected to the housing 126 and covers the mounting port. The housing 126 is filled with an electrolyte, such as an electrolyte.

[0079] The electrode assembly 125 may include an anode electrode sheet and a cathode electrode sheet, and a separator disposed between the anode electrode sheet and the cathode electrode sheet. During the charge and discharge process of the battery cell 12, active ions (such as lithium ions) are inserted and removed back and forth between the anode electrode sheet and the cathode electrode sheet. The separator can prevent the anode electrode sheet and the cathode electrode sheet from short-circuiting to a certain extent, and can allow active ions to pass through.

[0080] The battery cell 12 may also include a safety valve 124 (also referred to as a pressure relief valve), two poles 123 and two connecting members 121 (also referred to as current collecting members). The safety valve 124 may be provided on the cover plate 122, for example, the safety valve 124 is fixed on the cover plate 122, and the safety valve 124 is used to actuate when the internal pressure or temperature of the battery cell 12 reaches a threshold value to discharge the internal electrolyte to reduce the internal pressure or temperature of the battery cell 12. For example, the safety valve 124 may be a temperature-sensitive valve, a pressure-sensitive valve, etc. Two poles 123 may be provided on the cover plate 122, and the two poles 123 are respectively a positive pole 123 and a negative pole 123, and one pole 123 is connected to one connecting member 121 accordingly. The connecting member 121 is located between the cover plate 122 and the electrode assembly 125, and is used to electrically connect the electrode assembly 125 and the pole 123. The shell 126 is a hollow structure, and the material of the shell 126 can be metal or plastic; for example, the material of the shell 126 can be copper, iron, aluminum, steel, aluminum alloy, etc.

[0081] In this embodiment, the first insulating member 161 is arranged opposite to the portion of the first surface 1111 excluding the protrusion 1112 and / or the opening 1113, and the second insulating member 162 is arranged opposite to the protrusion 1112 and / or the opening 1113 on the first surface 1111, thereby improving the insulation protection capability of the second portion 111, reducing the probability of electrical ignition between the charged body of the battery cell assembly 18 and the second portion 111, reducing the probability of thermal runaway of the battery device 1, and thereby improving the reliability of the battery device 1.

[0082] In some embodiments, see Fig. 9 There is an overlapping area D between the edge of the first insulating member 161 and the edge of the second insulating member 162 ; the edge of the second insulating member 162 is located between the edge of the first insulating member 161 and the first surface 1111 .

[0083] In this embodiment, there is an overlapping area D between the edge of the first insulating member 161 and the edge of the second insulating member 162, and the edge of the second insulating member 162 is located between the edge of the first insulating member 161 and the first surface 1111, which can enhance the firmness of the connection between the first insulating member 161 and the second insulating member 162, thereby reducing the probability of the second insulating member 162 detaching from the protrusion 1112 and / or the opening 1113; at the same time, it also solves the problem of the gap between the first insulating member 161 and the second insulating member 162, thereby further improving the insulation protection capability of the second part 111, further reducing the probability of electrical ignition between the charged body of the battery cell assembly 18 and the second part 111, and further reducing the probability of thermal runaway of the battery device 1.

[0084] In some embodiments, see Fig. 9 , the width of the overlapping area D is greater than or equal to 2 mm.

[0085] For example, the width of the overlapping area D is 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, etc.

[0086] In some embodiments, see Fig. 9 The second insulating member 162 includes a first covering portion 1624 covering the top of the protrusion 1112 facing the battery cell assembly 18, a second covering portion 1627 located at the portion of the first surface 1111 exposed by the hollow portion 1611 and spaced apart from the protrusion 1112, and a connecting portion 1625 connecting the first covering portion 1624 and the second covering portion 1627, and the connecting portion 1625 is suspended; or, the second insulating member 162 includes a first covering portion 1624 covering the side of the protrusion 1112 facing the battery cell assembly 18, a second covering portion 1627 located at the portion of the first surface 1111 exposed by the hollow portion 1611 and contacting the protrusion 1112, and a third covering portion located on the side of the protrusion 1112.

[0087] In some examples, the first covering portion 1624, the connecting portion 1625, and the second covering portion 1627 are an integrally formed structure. In some examples, the first covering portion 1624, the third covering portion, and the second covering portion 1627 are an integrally formed structure.

[0088] In this embodiment, the second insulating member 162 includes a first covering portion 1624, a connecting portion 1625 and a second covering portion 1627, which can reduce the difficulty of installing the second insulating member 162. The second insulating member 162 includes a first covering portion 1624, a third covering portion and a second covering portion 1627, which can increase the protection capability of the second insulating member 162.

[0089] In some embodiments, see Figure 5~Figure 9 The raised portion 1112 includes a plurality of reinforcing ribs 11121, and the plurality of reinforcing ribs 11121 extend from one side of the first surface 1111 of the second portion 111 to the other opposite side, and divide the first surface 1111 into a plurality of sub-surfaces 11111; the first insulating member 161 includes a plurality of first insulating sub-members 1614, one first insulating sub-member 1614 covers one sub-surface 11111, and a hollow portion 1611 for exposing the reinforcing ribs 11121 is formed between two adjacent first insulating sub-members 1614; the number of the second insulating members 162 is multiple, and one second insulating member 162 covers one reinforcing rib 11121.

[0090] In this embodiment, the hollow portion 1611 for exposing the reinforcing rib 11121 is the first hollow portion 16112 mentioned above.

[0091] The number of the plurality of sub-surfaces 11111 is the same as the number of the plurality of first insulating sub-members 1614. When the first surface 1111 has a plurality of reinforcing ribs 11121 and does not have an opening 1113, the number of the plurality of second insulating members 162 (i.e., the first insulating portion 1622) is the same as the number of the plurality of reinforcing ribs 11121. When the first surface 1111 has an opening 1113 and a plurality of reinforcing ribs 11121, the number of the plurality of second insulating members 162 (i.e., the first insulating portion 1622 and the second insulating portion 1621) is equal to the sum of the number of the plurality of reinforcing ribs 11121 and the number of the opening 1113.

[0092] The plurality of reinforcing ribs 11121 may be arranged parallel to each other or in a crisscross pattern.

[0093] The reinforcing rib 11121 is located between two adjacent sub-surfaces 11111. The sub-surface 11111 has an opening 1113 thereon.

[0094] In some examples, the first insulating sub-component 1614 is an integrally formed structure, and the first insulating sub-component 1614 has a hollow portion 1611 (i.e., a second hollow portion 16111) for exposing the opening portion 1113. In this case, the second hollow portion 16111 may be a hole, such as a second through hole. In other examples, the first insulating sub-component 1614 includes two sub-insulating components, which are spaced apart to form a hollow portion 1611 (i.e., a second hollow portion 16111) for exposing the opening portion 1113.

[0095] In this embodiment, the reinforcing rib 11121 can increase the strength of the second portion 111 , and the second insulating member 162 covers the reinforcing rib 11121 , which can reduce the probability of electrical sparks between the reinforcing rib 11121 and the charged body, thereby improving the reliability of the battery device 1 .

[0096] In some embodiments, see Figure 11~Figure 13 The battery device 1 also includes a mounting member 15 and a connecting member 13; the mounting member 15 is arranged in the first part 112; the opening portion 1113 is a mounting hole 11131 that passes through the second part 111; the first through hole 1623 exposes the mounting hole 11131; the second part 111 covers the first part 112, and the connecting member 13 passes through the mounting hole 11131 and the first through hole 1623 from the outside of the second part 111 and then connects to the mounting member 15.

[0097] The number of the mounting parts 15 can be one or more, and the number of the connecting parts 13 is the same as the number of the mounting parts 15. The mounting parts 15 and the connecting parts 13 can be bolted or snap-fitted. The connecting parts 13 can be bolts, etc. The mounting parts 15 can be mounting sleeves, etc.

[0098] In some examples, a plurality of partition beams 14 are disposed in the first portion 112, and the partition beams 14 can divide the accommodating cavity into a plurality of sub-cavities, and a plurality of battery cells 12 or a plurality of battery modules are disposed in the sub-cavities. The plurality of partition beams 14 can be disposed parallel to each other or crisscrossed. The mounting member 15 can be disposed on the partition beams 14.

[0099] In this embodiment, the mounting member 15 and the connecting member 13 can enhance the firmness of the connection between the first part 112 and the second part 111. The second insulating member 162 covers the mounting hole 11131, which can reduce the probability of electrical sparks between the mounting hole 11131 and the charged body, thereby improving the reliability of the battery device 1.

[0100] In some embodiments, see Fig.14 The first insulating member 161 is an integrally formed structure; the hollow portion 1611 for exposing the mounting hole 11131 is a second through hole; there is an overlapping area D between the edge of the second through hole of the first insulating member 161 and the outer edge of the second insulating member 162; the outer edge of the second insulating member 162 is located between the edge of the second through hole of the first insulating member 161 and the first surface 1111.

[0101] In some examples, the width of the overlapping region D is greater than or equal to 2 mm. For example, the width of the overlapping region D is 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, etc.

[0102] In this embodiment, the first insulating member 161 is an integrally formed structure, which can facilitate disposing the first insulating member 161 on the first surface 1111 .

[0103] In some embodiments, see Fig.15The first insulating member 161 includes two sub-insulating members 1613 ; the two sub-insulating members 1613 are arranged at intervals to form a hollow portion 1611 for exposing the mounting hole 11131 .

[0104] In some examples, the two sub-insulators 1613 are overlapped with the second insulating member 162. In other examples, the sub-insulator 1613 is spaced apart from the second insulating member 162.

[0105] The mounting hole 11131 is located between the two sub-insulators 1613 .

[0106] In this embodiment, the two sub-insulating members 1613 are provided to reduce the difficulty of installing the second insulating member 162 and make the installation more flexible.

[0107] In some embodiments, see Fig.13 The battery device 1 also includes a bushing 17, which is padded between the mounting member 15 and the first surface 1111; the bushing 17 has a third through hole 171 for the connecting member 13 to pass through; the edge of the first through hole 1623 of the second insulating member 162 is at least located on the side of the outer edge of the bushing 17 away from the first surface 1111.

[0108] In some examples, the edge of the first through hole 1623 of the second insulating member 162 extends between the bushing 17 and the mounting member 15. In other examples, the edge of the first through hole 1623 of the second insulating member 162 extends to contact the outer wall of the mounting member 15.

[0109] In some examples, the bushing 17 includes a first portion and a second portion connected, the first portion is located between the mounting member 15 and the first surface 1111; the second portion has a third through hole 171 and is located in the mounting hole 11131. The second portion can contact the hole wall of the mounting hole 11131.

[0110] In this embodiment, the provided gasket can reduce the probability of loosening of the connecting member 13 and the mounting member 15. The edge of the first through hole 1623 of the second insulating member 162 is at least located on the side of the outer edge of the bushing 17 away from the first surface 1111, which can reduce the portion of the first through hole 1623 of the second insulating member 162 exposed from the bushing 17, thereby reducing the probability of electrical ignition between the bushing 17 and the charged body, thereby improving the reliability of the battery device 1.

[0111] In addition, the sealing performance between the second insulating member 162 and the bushing 17 can be improved.

[0112] In some embodiments, the flexibility coefficient of the first insulating member 161 is less than the flexibility coefficient of the second insulating member 162 .

[0113] For example, the ratio of the flexibility coefficient of the first insulating member 161 to the flexibility coefficient of the second insulating member 162 is 0.9, 0.8, 0.7, 0.5, 0.4, 0.3, 0.2 or 0.1, etc.

[0114] In this embodiment, the flexibility coefficient of the first insulating member 161 is smaller than the flexibility coefficient of the second insulating member 162 , so that the second insulating member 162 can be more conveniently disposed at the protruding portion 1112 and the opening portion 1113 .

[0115] In some embodiments, the first insulating member 161 includes a mica board or a polypropylene insulating film; and the second insulating member 162 includes a spray-coated insulating layer or mica paper.

[0116] In some examples, the first insulating member 161 is a mica board, and the second insulating member 162 is a mica paper.

[0117] In this embodiment, the first insulating member 161 includes a mica board or a polypropylene insulating film; the second insulating member 162 includes a sprayed insulating layer or mica paper, which can reduce the cost of the first insulating member 161 and the second insulating member 162.

[0118] In some embodiments, the first insulating member 161 covers the first surface 1111 of the second portion 111 ; the second insulating member 162 covers the protrusion 1112 , and / or the second insulating member 162 covers a portion of the first surface 1111 exposed by the hollow portion 1611 .

[0119] In this embodiment, the insulating member 16 and the second portion 111 may be integrally formed by covering each other, so as to facilitate assembly with the first portion 112 .

[0120] Hereinafter, several embodiments of the present application are provided.

[0121] Example 1, see Figure 2~Figure 4 The battery device 1 includes a battery cell assembly 18, a box body 11 and an insulating member 16; the box body 11 includes a first portion 112 and a second portion 111; the second portion 111 covers the first portion 112 and is used to accommodate the battery cell assembly 18;

[0122] The first surface 1111 of the second part 111 has an opening portion 1113; the first surface 1111 is the surface of the second part 111 close to the first part 112; the insulating member 16 is arranged on the first surface 1111 of the second part 111; wherein the insulating member 16 includes a first insulating member 161 and a second insulating member 162; the first insulating member 161 covers the first surface 1111 of the second part 111 and has a hollow portion 1611; the hollow portion 1611 exposes the opening portion 1113; the second insulating member 162 covers the portion of the first surface 1111 exposed by the hollow portion 1611, and has a first through hole 1623 connected to the opening portion 1113.

[0123] The opening 1113 is a plurality of mounting holes 11131. The battery device 1 further includes a mounting member 15 and a connecting member 13; the mounting member 15 is disposed in the first portion 112; the second portion 111 covers the first portion 112, and the connecting member 13 is connected to the mounting member 15 after passing through the mounting holes 11131 and the first through hole 1623 from the outside of the second portion 111. The battery device 1 further includes a bushing 17, which is cushioned between the mounting member 15 and the first surface 1111; the bushing 17 has a third through hole 171 for the connecting member 13 to pass through; the edge of the first through hole 1623 of the second insulating member 162 is at least located on the side of the outer edge of the bushing 17 away from the first surface 1111.

[0124] There is an overlapping area D between the edge of the first insulating member 161 and the edge of the second insulating member 162; the edge of the second insulating member 162 is located between the edge of the first insulating member 161 and the first surface 1111. The width of the overlapping area D is greater than or equal to 2 mm. The flexibility coefficient of the first insulating member 161 is less than the flexibility coefficient of the second insulating member 162. The first insulating member 161 includes a mica board or a polypropylene insulating film; the second insulating member 162 includes a sprayed insulating layer or mica paper.

[0125] Example 2, see Figure 2 , Figure 5 and Figure 6 The battery device 1 comprises a battery cell assembly 18 , a housing 11 and an insulating member 16 ; the housing 11 comprises a first portion 112 and a second portion 111 ; the second portion 111 covers the first portion 112 for accommodating the battery cell assembly 18 .

[0126] The first surface 1111 of the second part 111 has a protrusion 1112; the first surface 1111 is the surface of the second part 111 close to the first part 112; the insulating member 16 is arranged on the first surface 1111 of the second part 111; wherein the insulating member 16 includes a first insulating member 161 and a second insulating member 162; the first insulating member 161 covers the first surface 1111 of the second part 111 and has a hollow portion 1611; the hollow portion 1611 exposes the protrusion 1112; the second insulating member 162 covers the protrusion 1112.

[0127] The raised portion 1112 is a plurality of reinforcing ribs 11121. The plurality of reinforcing ribs 11121 extend from one side of the first surface 1111 of the second portion 111 to the other opposite side, and divide the first surface 1111 into a plurality of sub-surfaces 11111. The first insulating member 161 includes a plurality of first insulating sub-members 1614 arranged at intervals, one first insulating sub-member 1614 covers one sub-surface 11111, and a hollow portion 1611 for exposing the reinforcing ribs 11121 is formed between two adjacent first insulating sub-members 1614; the number of the plurality of first insulating sub-members 1614 is the same as the number of the plurality of sub-surfaces 11111. The number of the second insulating members 162 is a plurality, and one second insulating member 162 covers one reinforcing rib 11121.

[0128] There is an overlapping area D between the edge of the first insulating member 161 and the edge of the second insulating member 162; the edge of the second insulating member 162 is located between the edge of the first insulating member 161 and the first surface 1111. The width of the overlapping area D is greater than or equal to 2 mm. The flexibility coefficient of the first insulating member 161 is less than the flexibility coefficient of the second insulating member 162. The first insulating member 161 includes a mica board or a polypropylene insulating film; the second insulating member 162 includes a sprayed insulating layer or mica paper.

[0129] Example 3, see Figure 2 , Figure 7~Figure 9 , Figure 11~Figure 15The battery device 1 includes a battery cell assembly 18, a box body 11 and an insulating member 16; the box body 11 includes a first portion 112 and a second portion 111; the second portion 111 covers the first portion 112 for accommodating the battery cell assembly 18; the first surface 1111 of the second portion 111 has a protrusion 1112 and an opening 1113; the first surface 1111 is a surface of the second portion 111 close to the first portion 112; the insulating member 16 is disposed on the first surface 111 of the second portion 111 1; wherein the insulating member 16 includes a first insulating member 161 and a second insulating member 162; the first insulating member 161 covers the first surface 1111 of the second portion 111 and has a hollow portion 1611; the hollow portion 1611 exposes the protrusion 1112 and the opening 1113; the second insulating member 162 covers the protrusion 1112, and the second insulating member 162 also covers the portion of the first surface 1111 exposed by the hollow portion 1611, and has a first through hole 1623 communicating with the opening 1113.

[0130] The protrusion 1112 is a plurality of reinforcing ribs 11121. The plurality of reinforcing ribs 11121 extend from one side of the first surface 1111 of the second portion 111 to the other opposite side, and divide the first surface 1111 into a plurality of sub-surfaces 11111.

[0131] The first insulating member 161 includes a plurality of first insulating sub-members 1614, wherein one first insulating sub-member 1614 covers one sub-surface 11111, and a hollow portion 1611 for exposing the reinforcing rib 11121 is formed between two adjacent first insulating sub-members 1614; the number of the plurality of first insulating sub-members 1614 is the same as the number of the plurality of sub-surfaces 11111. The first insulating member 161 may be an integrally formed structure, and may include a plurality of first insulating sub-members 1614 disposed at intervals. The first insulating sub-member 1614 may be an integrally formed structure, or may include two sub-insulating members 1613 disposed at intervals.

[0132] The sub-surface 11111 has an opening 1113, and the opening 1113 is a plurality of mounting holes 11131. One first insulating sub-component 1614 may have a hollow portion 1611 exposing the mounting holes 11131. On each sub-surface 11111, the number of the mounting holes 11131 is the same as the number of the hollow portions 1611.

[0133] There are multiple second insulating members 162, and the second insulating members 162 may include a first insulating portion 1622 and a second insulating portion 1621. One first insulating portion 1622 covers one reinforcing rib 11121. One second insulating portion 1621 covers a portion of the first surface 1111 exposed through one hollow portion 1611 (i.e., second hollow portion 16111), and has a first through hole 1623 communicating with the mounting hole 11131.

[0134] The battery device 1 further includes a mounting member 15 and a connecting member 13; the mounting member 15 is disposed in the first portion 112; the second portion 111 covers the first portion 112, and the connecting member 13 is connected to the mounting member 15 after passing through the mounting hole 11131 and the first through hole 1623 from the outside of the second portion 111. The battery device 1 further includes a bushing 17, which is cushioned between the mounting member 15 and the first surface 1111; the bushing 17 has a third through hole 171 for the connecting member 13 to pass through; the edge of the first through hole 1623 of the second insulating member 162 is at least located on the side of the outer edge of the bushing 17 away from the first surface 1111.

[0135] There is an overlapping area D between the edge of the first insulating member 161 and the edge of the second insulating member 162; the edge of the second insulating member 162 is located between the edge of the first insulating member 161 and the first surface 1111. The width of the overlapping area D is greater than or equal to 2 mm. The flexibility coefficient of the first insulating member 161 is less than the flexibility coefficient of the second insulating member 162. The first insulating member 161 includes a mica board or a polypropylene insulating film; the second insulating member 162 includes a sprayed insulating layer or mica paper.

[0136] The above description is only an implementation method of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells, wherein the battery cells have electrode terminals; The box body comprises a first part and a second part; The second part covers the first part to form a receiving cavity for receiving the battery monomer assembly; the first surface of the second part has a protrusion and / or an opening; The first surface is a surface of the second portion facing the electrode terminal; an insulating member disposed between the first surface of the second portion and the battery cell assembly; Wherein, the insulating member includes a first insulating member and a second insulating member; the first insulating member is arranged opposite to the first surface of the second part, and the first insulating member has a hollow portion, and the hollow portion exposes the protrusion and / or the opening portion; the second insulating member is arranged opposite to the protrusion, and / or the second insulating member is arranged opposite to the portion of the first surface exposed by the hollow portion, and has a first through hole connected to the opening portion.

2. The battery device according to claim 1, characterized in that: An overlapping area exists between the edge of the first insulating member and the edge of the second insulating member; and the edge of the second insulating member is located between the edge of the first insulating member and the first surface.

3. The battery device according to claim 2, characterized in that: The width of the overlapping area is greater than or equal to 2 mm.

4. The battery device according to claim 1, characterized in that: The second insulating member includes a first covering portion covering the side of the protrusion facing the battery cell assembly, a second covering portion located at a portion of the first surface exposed by the hollow portion and spaced apart from the protrusion, and a connecting portion connecting the first covering portion and the second covering portion, wherein the connecting portion is suspended; or, The second insulating member includes a first covering portion covering the side of the protrusion facing the battery cell assembly, a second covering portion located at a portion of the first surface exposed by the hollow portion and contacting the protrusion, and a third covering portion located at a side of the protrusion.

5. The battery device according to claim 1, characterized in that: The raised portion includes a plurality of reinforcing ribs, which extend from one side of the first surface of the second portion to the other opposite side and divide the first surface into a plurality of sub-surfaces; the first insulating member includes a plurality of first insulating sub-members, one first insulating sub-member covers one sub-surface, and a hollow portion for exposing the reinforcing ribs is formed between two adjacent first insulating sub-members; the number of the second insulating members is multiple, and one second insulating member covers one reinforcing rib.

6. The battery device according to claim 1, characterized in that: The battery device also includes a mounting member and a connecting member; The mounting member is disposed in the first portion; the opening is a mounting hole penetrating the second portion; the first through hole exposes the mounting hole; The second part covers the first part, and the connecting member passes through the mounting hole and the first through hole from outside the second part and is connected to the mounting member.

7. The battery device according to claim 6, characterized in that: The first insulating member is an integrally formed structure; the hollow portion for exposing the mounting hole is a second through hole; An overlapping area exists between the edge of the second through hole of the first insulating member and the outer edge of the second insulating member; and the outer edge of the second insulating member is located between the edge of the second through hole of the first insulating member and the first surface.

8. The battery device according to claim 6, characterized in that: The first insulating member includes two sub-insulating members; the two sub-insulating members are arranged at an interval to form the hollow portion for exposing the mounting hole.

9. The battery device according to claim 6, characterized in that: The battery device also includes a bushing, which is arranged between the mounting member and the first surface; the bushing has a third through hole for the connecting member to pass through; the edge of the first through hole of the second insulating member is at least located on the side of the outer edge of the bushing away from the first surface.

10. The battery device according to any one of claims 1 to 9, characterized in that: The flexibility coefficient of the first insulating member is smaller than the flexibility coefficient of the second insulating member.

11. The battery device according to claim 10, characterized in that: The first insulating member includes a mica board or a polypropylene insulating film; the second insulating member includes a sprayed insulating layer or mica paper.

12. The battery device according to any one of claims 1 to 9, characterized in that: The first insulating member covers the first surface of the second portion; the second insulating member covers the protrusion, and / or the second insulating member covers a portion of the first surface exposed through the hollow portion.

13. An electrical equipment, characterized in that: The device comprises a device body and a battery device as claimed in any one of claims 1 to 12, wherein the battery device is arranged in the device body.

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