Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries. According to the battery provided by the invention, the insulating film wrapping the outer side of the bare battery cell is clamped with the first clamping part of the insulating member through the second clamping part of the insulating film, so that the insulating film is positioned relative to the insulating member. Compared with the prior art, according to the battery provided by the embodiment of the invention, the insulating film is positioned in a clamping manner, and a positioning manner of tool pressing or hot melting positioning is not needed, so that the energy consumption and the production time in the positioning process can be reduced while the insulating film is positioned.

Description

Technical Field

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

[0002] During the production process of batteries, the battery cells need to be insulated. Usually, a thin film with insulating properties needs to be coated on the outside of the battery cells, such as a Mylar (tough polyester polymer) sheet. Mylar is a key component for external insulation of battery cells (such as aluminum shell batteries) to prevent sharp objects such as metals below 200um from piercing the battery diaphragm and causing short circuits. In the prior art, it is usually necessary to position the Mylar and the top cover to ensure that the Mylar completely covers the battery cells.

[0003] In the prior art, a solution has been proposed that the Mylar of the battery and the top cover are not directly bonded. In this solution, the Mylar is pressed by a tool to achieve positioning, but the pressing force of the tool is limited, and the core loading will cause the Mylar to shift. The prior art also proposes to position the Mylar and the top cover by hot melting, but hot melting positioning requires a hot melting process that increases production time and energy loss.

[0004] Therefore, there is still room for improvement. Utility Model Content

[0005] In view of this, the present application provides a battery and an electrical device, the purpose of which is to solve the above technical problems to a certain extent.

[0006] According to a first aspect of the present application, a battery is provided, comprising:

[0007] a housing having an opening;

[0008] A top cover body and an insulating member, wherein the insulating member is disposed on one side of the top cover body, the top cover body is used to cover the opening of the housing to close the opening, and the insulating member faces the opening; the insulating member comprises an insulating body and a first clamping portion connected to the insulating body;

[0009] A bare battery cell is arranged inside the shell;

[0010] An insulating film is used to cover the outer side of the bare battery cell, the insulating film includes an insulating film body and a second clamping portion connected to the insulating film body, the first clamping portion is clamped with the second clamping portion to connect the insulating film to the insulating component.

[0011] Preferably, the first clamping portion includes a protrusion protruding from the insulating body toward the side where the bare battery cell is located, and the second clamping portion includes a clamping through hole, and the protrusion is inserted into the clamping through hole.

[0012] Preferably, the first clamping portion further comprises a flange portion connected to the protruding portion and facing the bare cell, and the outer edge of the flange portion exceeds the protruding portion, so that the flange portion has a limited portion opposite to the insulating body;

[0013] The limiting portion, the protruding portion and the insulating body together define a clamping groove, and the outer edge of the clamping through hole is embedded in the clamping groove.

[0014] Preferably, the insulating film body is connected to the outer side of the outer edge of the card-connecting through hole, and the thickness of the outer edge of the card-connecting through hole embedded in the card-connecting groove is greater than the thickness of the insulating film body.

[0015] Preferably, the thickness h1 of the outer edge of the card-connecting hole satisfies 0.1 mm.

[0016] Preferably, the battery further comprises an explosion-proof valve arranged on the top cover body, the insulating member further comprises an explosion-proof valve protection net arranged corresponding to the explosion-proof valve, the explosion-proof valve protection net is connected to the insulating body, and the explosion-proof valve protection net protrudes from the insulating body to the side where the bare battery cell is located;

[0017] The insulating film also includes a central through hole, and the explosion-proof valve protection net is passed through the central through hole.

[0018] Preferably, the explosion-proof valve protection net includes a groove portion arranged around the outer periphery of the explosion-proof valve protection net, and the outer edge of the middle through hole is embedded in the groove portion;

[0019] The insulating film body is connected to the outer side of the outer edge of the middle through hole, and the thickness of the outer edge of the middle through hole is greater than the thickness of the insulating film body.

[0020] Preferably, the thickness h2 of the outer edge of the middle through hole satisfies 0.1 mm. <h2<1mm。

[0021] Preferably, the insulating film further has at least one interruption opening arranged at least at the outer edge of the middle through hole, and each of the interruptions is defined by two side portions opposite to each other;

[0022] The insulating film further comprises a connecting assembly arranged corresponding to each interruption, the connecting assembly comprising a first connecting member connected to one of the two side portions and a second connecting member connected to the other of the two side portions, the first connecting member and the second connecting member being engaged with each other;

[0023] At least part of the at least one interrupted opening extends from an outer edge of the middle through hole to the insulating film body.

[0024] ​Preferably, the first one of the first connecting member and the second connecting member extends through the interruption opening, and the second one of the first connecting member and the second connecting member passes through the first one and is engaged with the first one.

[0025] According to a second aspect of the present application, an electrical device is provided, wherein the electrical device comprises the battery as described above.

[0026] According to the battery provided by the present application, the insulating film wrapped on the outside of the bare cell is clamped with the first clamping part of the insulating member by its own second clamping part, so as to position the insulating film relative to the insulating member. Compared with the prior art, the battery provided by the embodiment of the present application positions the insulating film by clamping, without using a positioning method such as tooling pressing or hot melt positioning, thereby ensuring that the insulating film is positioned while reducing the energy consumption and production time of the positioning process.

[0027] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of an exploded view of a battery provided according to an embodiment of the present application is shown.

[0029] Figure 2 A schematic diagram of a cross-sectional view of a battery provided according to an embodiment of the present application is shown.

[0030] Figure 3 Shows Figure 2 Schematic diagram of the enlarged view at A in the middle.

[0031] Figure 4 Shows Figure 2 Schematic diagram of the enlarged view at B in the figure.

[0032] Figure 5 A schematic diagram showing a plan view of an insulating member of a battery provided according to an embodiment of the present application.

[0033] Figure 6 A schematic diagram showing a cross-sectional view of an insulating component of a battery provided according to an embodiment of the present application is shown.

[0034] Figure 7 Shows Figure 6 Schematic diagram of the enlarged view at C in the middle.

[0035] Figure 8 Shows Figure 6 Schematic diagram of the enlarged view at D in the middle.

[0036] Fig. 9A schematic diagram showing a plan view of an insulating film of a battery provided according to an embodiment of the present application.

[0037] Fig.10 Shows Fig. 9 Schematic diagram of the enlarged view at G in the middle.

[0038] Fig.11 A schematic diagram showing another plan view of the insulating film of a battery provided according to an embodiment of the present application is shown.

[0039] Fig.12 Shows Fig.11 Schematic diagram of the enlarged view at E in the middle.

[0040] Fig.13 Shows Fig.11 Schematic diagram of the enlarged view at F in the middle.

[0041] Reference numerals:

[0042] 100-housing; 110-opening;

[0043] 200-top cover body;

[0044] 300-insulating member; 310-insulating body; 320-first clamping portion; 321-protruding portion; 322-flange portion; 322a-limiting portion; 322b-clamping groove; 330-explosion-proof valve protection net; 331-groove portion; 340-pole hole;

[0045] 400-insulating film; 410-insulating film body; 420-second clamping part; 430-middle through hole; 431-interruption; 432-first side; 433-second side; 440-connecting assembly; 441-first connecting member; 442-second connecting member;

[0046] 500-bare battery cell; 600-adapter; 710-pole; 720-plastic coating; 800-explosion-proof valve; 900-explosion-proof valve protection sheet. DETAILED DESCRIPTION

[0047] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0051] According to the first aspect of the embodiment of the present application, a battery is provided. In the embodiment of the present application, the battery may be a secondary battery, which refers to a battery that can be used continuously by activating the active material by charging after the battery is discharged. The battery may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiment of the present application does not limit this.

[0052] As an example, the battery can be a cylindrical battery, a prismatic battery, a soft-pack battery or a battery of other shapes. Prismatic batteries include square shell batteries, blade-shaped batteries, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. There is no particular limitation in the present application.

[0053] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more batteries to provide higher voltage and capacity.

[0054] In some embodiments, the battery may be a battery module. When there are multiple batteries, the multiple batteries are arranged and fixed to form a battery module.

[0055] In some embodiments, the battery may be a battery pack, which includes a case and batteries, wherein the batteries or battery modules are accommodated in the case.

[0056] 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.

[0057] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0058] The following will be combined Figures 1 to 13 Describe the structure and working principle of the battery in detail.

[0059] The battery provided according to the embodiment of the present application includes a shell 100, a top cover body 200, an insulating member 300, an insulating film 400 and a bare cell 500. In the embodiment, the shell 100 has an opening 110. The insulating member 300 is arranged on one side of the top cover body 200, and the top cover body 200 is used to cover the opening 110 of the shell 100 to close the opening 110. The insulating member 300 faces the opening 110, and the top cover body 200 is provided with a pole through hole for the pole to be installed. An upper plastic 720 is arranged between the pole and the top cover body 200 to fix the pole and insulate the pole from the top cover body. Among them, the insulating member 300 includes an insulating body 310 and a first clamping portion 320 connected to the insulating body 310.

[0060] In an embodiment, the bare cell 500 is disposed inside the shell 100, and the insulating film 400 is used to cover the outside of the bare cell 500. The insulating film 400 includes an insulating film body 410 and a second clamping portion 420 connected to the insulating film body 410. The first clamping portion 320 is clamped with the second clamping portion 420 so that the insulating film 400 is connected to the insulating component 300.

[0061] Thus, according to the battery provided in the embodiment of the present application, the insulating film 400 wrapped on the outside of the bare cell 500 is engaged with the first engaging portion 320 of the insulating member 300 by the second engaging portion 420 of the insulating film 400, thereby positioning the insulating film 400 relative to the insulating member 300. Compared with the prior art, the battery provided in the embodiment of the present application positions the insulating film 400 by engaging, without the need for a positioning method such as tooling pressing or hot melt positioning, thereby ensuring that the insulating film 400 is positioned while reducing the energy consumption and production time of the positioning process.

[0062] In an embodiment, as an example, the insulating member 300 may be, for example, a lower plastic between the bare cell 500 and the top cover body 200 in the height direction of the battery, and the lower plastic may be, for example, in the shape of a rectangular sheet. In an embodiment, as an example, the top cover body 200 may also be, for example, a cover plate-like structure in a rectangular shape. In addition, in an embodiment, the insulating film 400 may be, for example, a Mylar film.

[0063] In addition, in the embodiment, the insulating member 300 may be provided with a pole hole 340, and the pole hole is used to pass the pole 710. In the embodiment, a transfer plate 600 is provided below the insulating member 300 corresponding to each pole 710, and the transfer plate 600 is used to connect the pole 710 and the pole ear of the bare battery cell 500.

[0064] According to the battery provided in the embodiment of the present application, the first clamping portion 320 may include a protrusion 321 protruding from the insulating body 310 toward the side where the bare battery cell 500 is located, and the second clamping portion 420 includes a clamping through hole, and the protrusion 321 is inserted into the clamping through hole.

[0065] In this way, according to the battery provided in the embodiment of the present application, the first clamping portion 320 having the protrusion 321 is inserted into the clamping through hole of the second clamping portion 420, which is equivalent to embedding a part of the first clamping portion 320 into the second clamping portion 420, thereby enabling the clamping connection between the first clamping portion 320 and the second clamping portion 420 to be achieved in a relatively simple installation manner.

[0066] As an example, in an embodiment, the protrusion 321 of the first clamping portion 320 can be, for example, a columnar structure protruding toward the bare battery cell 500. Since the protrusion 321 is inserted into the clamping through hole, a portion of the outer side of the protrusion 321 is in contact with the inner side of the clamping through hole. Therefore, the shape of the cross-section of the portion of the outer side of the protrusion 321 that is in contact with the inner side of the clamping through hole can be the same as the shape of the inner side of the clamping through hole.

[0067] According to the battery provided in the embodiment of the present application, the first clamping portion 320 may further include a flange portion 322 connected to the protruding portion 321 and facing the side of the bare cell 500, and the outer edge of the flange portion 322 may exceed the protruding portion 321, so that the flange portion 322 has a defined portion 322a opposite to the insulating body 310. In the embodiment, the defined portion 322a, the protruding portion 321 and the insulating body 310 jointly define a clamping groove 322b, and the outer edge of the clamping through hole is embedded in the clamping groove 322b.

[0068] So, see Figure 4According to the battery provided in the embodiment of the present application, the first clamping portion 320 is further provided with a flange portion 322 on the side facing the bare battery cell 500, thereby, the flange portion 322 and the protrusion 321 can jointly define a stepped structure. With this stepped structure, since the outer edge of the flange portion 322 exceeds the protrusion 321, the flange portion 322 is larger in cross-sectional area than the protrusion 321, so that the side of the limiting portion 322a of the flange portion 322 formed by exceeding the protrusion 321 facing the insulating body 310 (the upper side of the protrusion 321), the side of the insulating body 310 facing the limiting portion 322a (the lower side of the insulating body 310) and the protrusion 321 (that is, the outer side of the protrusion 321) jointly define a closed clamping groove 322b surrounding the outer side of the protrusion 321. This allows the outer edge of the snap-in hole to be circumferentially embedded in the snap-in groove 322 b.

[0069] Therefore, due to the setting of the snap-fit ​​groove 322b, on the one hand, the insulating film 400 can be prevented from escaping from the protrusion 321 along the direction toward the bare battery cell 500 to a certain extent. On the other hand, the snap-fit ​​groove 322b formed by the flange portion 322 can further provide a positioning effect for the insulating film 400.

[0070] As an example, in the embodiment, the protrusion 321 and the flange 322 may both be cylindrical structures. Therefore, according to the contents mentioned in the above description, the diameter of the flange 322 is larger than the diameter of the protrusion 321, so that the flange 322 has a larger cross-sectional area. Correspondingly, the card-connection hole may also be circular, and the diameter of the card-connection hole may be smaller than the outer diameter of the flange 322, and may be equal to or slightly smaller than the outer diameter of the protrusion 321. When the flange 322 and the protrusion 321 are both matched with the card-connection hole, since the card-connection hole is provided on the insulating film 400, the deformation of the insulating film 400 may be utilized to press the flange 322 through the card-connection hole by applying an external force, so that the protrusion 321 is penetrated into the card-connection hole.

[0071] According to the battery provided in the embodiment of the present application, the insulating film body 410 can be connected to the outer side of the outer edge of the card-connecting hole, and the thickness of the outer edge of the card-connecting hole embedded in the card-connecting groove 322b is greater than the thickness of the insulating film body 410.

[0072] According to the battery provided in the embodiment of the present application, it is equivalent to thickening the outer edge of the card-connection hole relative to the insulating film body 410. In this way, on the one hand, the durability of the card-connection hole when the protrusion 321 and the flange 322 are connected and disconnected can be provided, so that the outer edge of the card-connection hole is not easy to cause plastic expansion of the card-connection hole when the flange 322 passes through the card-connection hole, that is, the strength of the outer edge of the card-connection hole is improved; on the other hand, through the partially thickened outer edge of the card-connection hole, the positioning of the outer edge of the card-connection hole and the card-connection groove 322b can be more easily achieved by interference or slight interference fit, which is conducive to providing a stable positioning effect for the insulating film 400.

[0073] According to the battery provided in the embodiment of the present application, the thickness h1 of the outer edge of the card-connection hole can meet 0.1 mm

[0074] According to the battery provided in the embodiment of the present application, the battery may further include an explosion-proof valve disposed on the top cover body 200, and the insulating member 300 may further include an explosion-proof valve protection net 330 disposed corresponding to the explosion-proof valve 800 (the explosion-proof valve 800 may be covered with an explosion-proof valve protection sheet 900), and the explosion-proof valve protection net 330 may be connected to the insulating body 310, and the explosion-proof valve protection net 330 protrudes from the insulating body 310 to the side where the bare battery cell 500 is located. In the embodiment, the insulating film 400 may further include a middle through hole 430, and the explosion-proof valve protection net 330 is penetrated through the middle through hole 430.

[0075] Thus, according to the battery provided in the embodiment of the present application, the explosion-proof valve protection net 330 can be a mesh structure in the form of a grid, which can be avoided by the middle through hole 430 on the insulating film 400 to ensure that when the battery has, for example, thermal runaway, the fluid in the battery shell 100 can be ejected into the external environment through the explosion-proof valve.

[0076] According to the battery provided in the embodiment of the present application, the explosion-proof valve protection net 330 may include a groove portion 331 arranged around the outer periphery of the explosion-proof valve protection net 330, and the outer edge of the middle through hole 430 is embedded in the groove portion 331. In the embodiment, see Figure 3 Here, the positioning form in which the outer edge of the middle through hole 430 is embedded in the groove 331 can refer to the positioning form in which the outer edge of the clamping through hole is embedded in the clamping groove 322b. In other words, the positioning form in which the middle through hole 430 is sleeved on the outer periphery of the explosion-proof valve protection net 330 and embedded is more conducive to ensuring the relative position of the explosion-proof valve protection net 330 with respect to the insulating film 400, thereby further improving the positioning effect of the insulating film 400.​

[0077] Similarly, the insulating film main body 410 can be connected to the outside of the outer edge of the middle through hole 430, and the thickness of the outer edge of the middle through hole 430 can be greater than the thickness of the insulating film main body 410. That is to say, the outer edge of the middle through hole 430 can also adopt this local thickening setting method, which is beneficial to improving the strength of the middle through hole 430 and providing a more effective positioning effect. Specifically, reference can also be made to the above description of the local thickening setting of the outer edge of the snap-through hole.

[0078] Similarly, for the battery provided by the embodiment of the present application, the thickness h2 of the outer edge of the middle through hole 430 satisfies 0.1 mm < h2 < 1 mm. The functions of the upper and lower limits of this thickness range can refer to the description of the thickness h1 of the outer edge of the snap-through hole mentioned in the above description, and will not be repeated here.

[0079] For the battery provided by the embodiment of the present application, as Fig.10 shown, the insulating film 400 may further have at least one break 431 provided at least on the outer edge of the middle through hole 430, and each break 431 is defined by two opposite side portions. In an embodiment, the insulating film 400 may further include a connection assembly 440 provided corresponding to each break 431. The connection assembly 440 includes a first connection member 441 connected to one of the two side portions and a second connection member 442 connected to the other of the two side portions, and the first connection member 441 and the second connection member 442 are snap-connected to each other.

[0080] Thus, for the battery provided by the embodiment of the present application, the above at least one break 431 is used to allow local deformation of the insulating film 400, so that the explosion-proof valve protection net 330 can pass through the middle through hole 430 of the insulating film 400 while using the snap-connected first connection member 441 and second connection member 442 in the connection assembly 440 to ensure that the middle through hole 430 of the insulating film 400 and the explosion-proof valve protection net 330 can be tightly combined.

[0081] In an embodiment, at least some of the above at least one break 431 can extend from the outer edge of the middle through hole 430 to the insulating film main body 410, so that this break 431 can increase the deformation amount of the middle through hole 430 to more conveniently allow the explosion-proof valve protection net 330 to pass through the middle through hole 430.

[0082] In an embodiment, as Fig.10 shown, each break includes a first side portion 432 and a second side portion 433 that are opposite to each other and spaced apart, and the break 431 is defined by the gap between the first side portion 432 and the second side portion 433.

[0083] As an example, the number of the interruption opening 431 may be one, and the interruption opening 431 extends from the outer edge of the middle through hole 430 to the insulation film body 410 .

[0084] According to the battery provided in the embodiment of the present application, Fig.10 As shown, the first one of the first connector 441 and the second connector 442 can extend through the interruption 431, and the second one of the first connector 441 and the second connector 442 can be inserted through the first one and snap-fit ​​with the first one. As an example, the first connector 441 can extend through the interruption 431, and the first connector 441 can be, for example, a strip-shaped structure, and the second connector 442 can be a protruding structure connected to the outer edge of the middle through hole 430, and the protruding structure can be inserted through a through hole pre-opened on the first connector 441, so as to form a snap-fit ​​with the first connector 441.

[0085] According to the second aspect of the embodiment of the present application, an electric device is provided. The electric device includes the battery as above, and may also include an electric mechanism powered by the battery as above. The electric device also has the above beneficial effects, which will not be repeated here.

[0086] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or directly / indirectly applied in other related technical fields are included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A housing (100) having an opening (110); A top cover body (200) and an insulating component (300), wherein the insulating component (300) is arranged on one side of the top cover body (200), the top cover body (200) is used to cover the opening (110) of the housing (100) to close the opening (110), and the insulating component (300) faces the opening (110); the insulating component (300) comprises an insulating body (310) and a first clamping portion (320) connected to the insulating body (310); A bare battery cell (500) is arranged inside the housing; An insulating film (400) is used to cover the outer side of the bare battery cell (500), wherein the insulating film (400) comprises an insulating film body (410) and a second clamping portion (420) connected to the insulating film body (410), wherein the first clamping portion (320) is clamped with the second clamping portion (420) so that the insulating film (400) is connected to the insulating component (300).

2. The battery according to claim 1, characterized in that The first clamping portion (320) comprises a protruding portion (321) protruding from the insulating body (310) toward the side where the bare battery cell (500) is located, and the second clamping portion (420) comprises a clamping through hole, and the protruding portion (321) is penetrated through the clamping through hole.

3. The battery according to claim 2, characterized in that The first clamping portion (320) further comprises a flange portion (322) connected to the protruding portion (321) and facing the bare battery cell (500), and an outer edge of the flange portion (322) exceeds the protruding portion (321), so that the flange portion (322) has a limiting portion (322a) opposite to the insulating body (310); The limiting portion (322a), the protruding portion (321) and the insulating body (310) jointly define a snap-in groove (322b), and the outer edge of the snap-in through hole is embedded in the snap-in groove (322b).

4. The battery according to claim 3, characterized in that The insulating film body (410) is connected to the outer side of the outer edge of the card-connecting through hole, and the thickness of the outer edge of the card-connecting through hole embedded in the card-connecting groove (322b) is greater than the thickness of the insulating film body (410).

5. The battery according to claim 4, characterized in that The thickness h1 of the outer edge of the card through hole meets 0.1mm <h1<1mm。 6. The battery according to claim 1, characterized in that The battery further comprises an explosion-proof valve arranged on the top cover body, the insulating component (300) further comprises an explosion-proof valve protection net (330) arranged corresponding to the explosion-proof valve, the explosion-proof valve protection net (330) is connected to the insulating body (310), and the explosion-proof valve protection net (330) protrudes from the insulating body (310) toward the side where the bare battery cell (500) is located; The insulating film (400) further comprises a central through hole (430), and the explosion-proof valve protection net (330) is passed through the central through hole (430).

7. The battery according to claim 6, characterized in that The explosion-proof valve protection net (330) comprises a groove portion (331) arranged around the outer periphery of the explosion-proof valve protection net (330), and the outer edge of the middle through hole (430) is embedded in the groove portion (331); The insulating film body (410) is connected to the outer side of the outer edge of the middle through hole (430), and the thickness of the outer edge of the middle through hole (430) is greater than the thickness of the insulating film body (410).

8. The battery according to claim 7, characterized in that The thickness h2 of the outer edge of the middle through hole (430) satisfies 0.1 mm. <h2<1mm。 9. The battery according to claim 6, characterized in that The insulating film (400) further has at least one interruption opening (431) at least arranged at the outer edge of the middle through hole (430), and each interruption opening (431) is defined by two side portions opposite to each other; The insulating film (400) further comprises a connection assembly (440) arranged corresponding to each interruption (431), the connection assembly (440) comprising a first connection member (441) connected to one of the two side portions and a second connection member (442) connected to the other of the two side portions, the first connection member (441) and the second connection member (442) being clamped to each other; At least part of the at least one interruption opening (431) extends from the outer edge of the middle through hole (430) to the insulating film body (410).

10. The battery according to claim 9, characterized in that The first one of the first connecting member (441) and the second connecting member (442) extends through the interruption opening (431), and the second one of the first connecting member (441) and the second connecting member (442) passes through the first one and is clamped with the first one.

11. An electrical device, characterized in that: The electric device comprises the battery according to any one of claims 1 to 10.

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