Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, the battery has a height direction, and the battery comprises a shell, a top cover assembly, an electrode assembly and an insulation assembly. The top cover assembly covers the shell so as to define an accommodating cavity; the electrode assembly is arranged in the accommodating cavity; the insulation assembly is arranged in the containing cavity and comprises an insulation film and an insulation fixing piece, the insulation film wraps the electrode assembly, one end of the insulation fixing piece is connected with the top cover assembly, and the other end of the insulation fixing piece extends to the end, away from the top cover assembly, of the electrode assembly in the height direction; and at least part of the spring abuts against one end of the electrode assembly away from the top cover assembly. According to the battery, the fixing effect on the electrode assembly can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery and an electrical device. Background Technology

[0002] A secondary battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after discharge to reactivate its active materials and continue to be used. In a secondary battery, the structure used to enclose the electrode assembly is an insulating film. This film isolates the electrode assembly from the casing, preventing direct contact and potential short circuits or other safety hazards. In traditional secondary batteries, the insulating film only provides insulation and has limited effectiveness in securing the electrode assembly, allowing it to easily move and collide within the casing. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a battery that can improve the fixation of the electrode assembly.

[0004] This application also provides an electrical device.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] According to a first aspect of this application, a battery has a height direction and includes: a housing; a top cover assembly covering the housing to define a receiving cavity; an electrode assembly disposed within the receiving cavity; and an insulating assembly disposed within the receiving cavity. The insulating assembly includes an insulating film and an insulating fastener. The insulating film covers the electrode assembly, one end of the insulating fastener is connected to the top cover assembly, and the other end of the insulating fastener extends along the height direction to the end of the electrode assembly away from the top cover assembly and at least partially abuts against the end of the electrode assembly away from the top cover assembly.

[0007] The battery of this application has the following advantages:

[0008] In this embodiment, the electrode assembly can be housed within the receiving cavity to protect it. Simultaneously, when the electrode assembly is housed within the receiving cavity, an insulating film can be wrapped around it to insulate it from the outer casing and top cover assembly, preventing direct contact between the electrode assembly and the casing that could lead to short circuits or other safety accidents. Furthermore, since one end of the insulating fastener is connected to the top cover assembly, and the other end extends along the height direction to the end of the electrode assembly furthest from the top cover assembly, and at least partially abuts against this end, the insulating fastener further insulates the electrode assembly from the outer casing and top cover assembly when it is housed within the receiving cavity. Simultaneously, the insulating fastener supports and fixes the electrode assembly between it and the top cover assembly, improving the structural stability of the electrode assembly within the receiving cavity and preventing shaking or collisions, thus enhancing battery safety.

[0009] According to the battery of the first aspect of this application, the insulating fastener includes a first fastening part, a second fastening part, and a third fastening part. The first fastening part and the second fastening part are both extended along the height direction. In the height direction, one end of the first fastening part and the second fastening part are connected to the top cover assembly, and the other end of the first fastening part and the second fastening part are both connected to the third fastening part. The third fastening part abuts against the end of the electrode assembly away from the top cover assembly.

[0010] According to a first aspect embodiment of the battery, the battery further has a length direction and a width direction, the length direction, the width direction and the height direction are perpendicular to each other, the insulating film covers both sides of the electrode assembly along the width direction and one end of the electrode assembly away from the top cover assembly along the height direction, the first fixing part and the second fixing part are spaced apart along the length direction, and the first fixing part and the second fixing part are respectively connected to both ends of the third fixing part along the length direction, the first fixing part and the second fixing part respectively cover both sides of the electrode assembly along the length direction.

[0011] According to the battery of the first aspect of this application, the insulating film covers both sides of the electrode assembly along the length direction and one end of the electrode assembly away from the top cover assembly along the height direction. The first fixing part and the second fixing part are spaced apart along the width direction, and the first fixing part and the second fixing part are respectively connected to both ends of the third fixing part along the width direction. The first fixing part and the second fixing part respectively cover both sides of the electrode assembly along the width direction.

[0012] According to the battery of the first aspect of this application, the insulating film at least partially covers one end of the electrode assembly away from the top cover assembly along the height direction, and is located between the third fixing portion and the end of the electrode assembly away from the top cover assembly.

[0013] According to the battery of the first aspect of this application, the insulating film at least partially covers one end of the electrode assembly away from the top cover assembly along the height direction, and the third fixing portion is located between the insulating film and the end of the electrode assembly away from the top cover assembly.

[0014] According to a battery embodiment of the first aspect of this application, the insulating film includes a covering portion and a connecting portion. The covering portion covers the electrode assembly. The connecting portion is connected to both the edge of the covering portion near the first fixing portion and the edge of the covering portion near the second fixing portion. The connecting portion near the first fixing portion is bent toward the first fixing portion and is at least partially connected to the first fixing portion. The connecting portion near the second fixing portion is bent toward the second fixing portion and is at least partially connected to the second fixing portion.

[0015] According to a battery based on a first aspect of this application, the top cover assembly includes a top cover and a connector. The top cover is fitted onto the housing, and the connector is connected to the side of the top cover near the receiving cavity along the height direction and is received within the receiving cavity. The first fixing part and the second fixing part are both fixedly connected to the connector.

[0016] According to the battery of the first aspect of this application, the thickness of the insulating fastener is greater than the thickness of the insulating film.

[0017] An electrical device according to a second aspect of this application includes: a battery as described above.

[0018] The electrical appliance of this application has the following advantages:

[0019] In the electrical device of this application, since the battery described above can improve the fixing effect on the electrode assembly, the battery of this application has higher safety performance, so that the electrical device of this application can have higher safety performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An exploded structural diagram of a battery according to an embodiment of this application is shown;

[0022] Figure 2 A schematic diagram of the structure of an insulating fastener according to an embodiment of this application is shown;

[0023] Figure 3 A schematic diagram of the structure of an insulating film according to an embodiment of this application is shown;

[0024] Figure 4 An exploded view of an insulating component according to an embodiment of this application is shown.

[0025] Figure 5 An exploded view of an insulating component according to an embodiment of this application is shown.

[0026] Figure 6 A schematic diagram of the top cover assembly and insulating fastener according to an embodiment of this application is shown;

[0027] Figure 7 It shows Figure 6 A magnified structural diagram of point A in the middle.

[0028] Explanation of key component symbols:

[0029] 100 - Housing; 110 - Receiving cavity;

[0030] 200 - Top cover assembly; 210 - Top cover; 220 - Connector; 221 - Connecting hole;

[0031] 300-Electrode Assembly;

[0032] 400 - Insulating component; 410 - Insulating film; 411 - Covering part; 412 - Connecting part; 420 - Insulating fastener; 421 - First fastening part; 422 - Second fastening part; 423 - Third fastening part; 424 - Engaging part;

[0033] x - length direction; y - width direction; z - height direction. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Reference Figure 1 As shown, the battery involved in the embodiments of this application has a height direction z, and the battery includes: a housing 100, a top cover assembly 200, an electrode assembly 300, and an insulating assembly 400.

[0040] Specifically, the top cover assembly 200 covers the housing 100 to define the receiving cavity 110; the electrode assembly 300 is disposed in the receiving cavity 110; the insulating assembly 400 is disposed in the receiving cavity 110, the insulating assembly 400 includes an insulating film 410 and an insulating fastener 420, the insulating film 410 covers the electrode assembly 300, one end of the insulating fastener 420 is connected to the top cover assembly 200, and the other end of the insulating fastener 420 extends along the height direction z to the end of the electrode assembly 300 away from the top cover assembly 200, and at least partially abuts against the end of the electrode assembly 300 away from the top cover assembly 200.

[0041] It should be noted that the height direction z is Figure 1 The direction indicated by z in the middle.

[0042] In this embodiment, the electrode assembly 300 can be housed within the receiving cavity 110 to protect it. Simultaneously, when the electrode assembly 300 is housed within the receiving cavity 110, the insulating film 410 can cover the outside of the electrode assembly 300, thus insulating the electrode assembly 300 from the outer casing and the top cover assembly 200. This prevents the electrode assembly 300 from directly contacting the casing 100 and causing electric shock, which could lead to short circuits or other safety accidents. Furthermore, since one end of the insulating fastener 420 is connected to the top cover assembly 200, and the other end of the insulating fastener 420 extends along the height direction z to the electrode assembly 300 away from the top cover assembly 200... One end, and at least partially abuts against the end of the electrode assembly 300 away from the top cover assembly 200, so that when the electrode assembly 300 is housed in the receiving cavity 110, the insulating fastener 420 can further insulate the electrode assembly 300 from the outer shell and the top cover assembly 200. At the same time, the insulating fastener 420 can support and fix the electrode assembly 300, thereby fixing the electrode assembly 300 between the insulating fastener 420 and the top cover assembly 200, thereby improving the structural stability of the electrode assembly 300 in the receiving cavity 110, preventing the electrode assembly 300 from shaking and colliding in the receiving cavity 110, and improving the safety performance of the battery.

[0043] Reference Figure 2 As shown, in some embodiments, the insulating fastener 420 includes a first fastening part 421, a second fastening part 422, and a third fastening part 423. The first fastening part 421 and the second fastening part 422 both extend along the height direction z. In the height direction z, one end of the first fastening part 421 and the second fastening part 422 are connected to the top cover assembly 200, and the other end of the first fastening part 421 and the second fastening part 422 are connected to the third fastening part 423. The third fastening part 423 abuts against the end of the electrode assembly 300 away from the top cover assembly 200.

[0044] In this embodiment, in the height direction z, since one end of the first fixing part 421 and the second fixing part 422 are both connected to the top cover assembly 200, and the other end of the first fixing part 421 and the second fixing part 422 are both connected to the third fixing part 423, the third fixing part 423 and the top cover assembly 200 can be fixedly connected through the first fixing part 421 and the second fixing part 422. Since the third fixing part 423 abuts against the end of the electrode assembly 300 away from the top cover assembly 200, the electrode assembly 300 can be fixed between the third fixing part 423 and the top cover assembly 200, thereby achieving the fixation of the electrode assembly 300 in the receiving cavity 110.

[0045] Reference Figure 4 as well as Figure 5 As shown, in some embodiments, the battery also has a length direction x and a width direction y, the length direction x, the width direction y and the height direction z are perpendicular to each other, the insulating film 410 covers both sides of the electrode assembly 300 along the width direction y and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z, the first fixing part 421 and the second fixing part 422 are spaced apart along the length direction x, and the first fixing part 421 and the second fixing part 422 are respectively connected to both ends of the third fixing part 423 along the length direction x, and the first fixing part 421 and the second fixing part 422 respectively cover both sides of the electrode assembly 300 along the length direction x.

[0046] It should be noted that the length direction x is Figure 1 The x-axis points in the direction of the width, and the y-axis is the width direction. Figure 1 The direction indicated by y in the middle.

[0047] In this embodiment, the electrode assembly 300 can be covered on both sides along the width direction y and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z by the insulating film 410, so as to provide insulation coverage for both sides along the width direction y and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z. At the same time, the electrode assembly 300 can be covered on both sides along the length direction x by the first fixing part 421 and the second fixing part 422, so as to achieve full coverage of the electrode assembly 300 by the insulating film 410 and the insulating fixing member 420.

[0048] In some embodiments, the insulating film 410 covers both sides of the electrode assembly 300 along the length direction x and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z. The first fixing part 421 and the second fixing part 422 are spaced apart along the width direction y, and the first fixing part 421 and the second fixing part 422 are respectively connected to the two ends of the third fixing part 423 along the width direction y. The first fixing part 421 and the second fixing part 422 respectively cover both sides of the electrode assembly 300 along the width direction y.

[0049] In this embodiment, the electrode assembly 300 can be covered on both sides along the length direction x and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z by the insulating film 410, so as to provide insulation coverage for both sides along the length direction x and the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z. At the same time, the electrode assembly 300 can be covered on both sides along the width direction y by the first fixing part 421 and the second fixing part 422, so as to achieve full coverage of the electrode assembly 300 by the insulating film 410 and the insulating fixing member 420.

[0050] Reference Figure 4 As shown, the insulating film 410 at least partially covers the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z, and is located between the third fixing part 423 and the end of the electrode assembly 300 away from the top cover assembly 200.

[0051] In this embodiment, since the insulating film 410 at least partially covers the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z, and is located between the third fixing part 423 and the end of the electrode assembly 300 away from the top cover assembly 200, the portion of the insulating film 410 covering the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z can be supported by the third fixing part 423, thereby improving the structural strength of the insulating film 410.

[0052] Reference Figure 5 As shown, in some embodiments, the insulating film 410 at least partially covers the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z, and the third fixing part 423 is located between the insulating film 410 and the end of the electrode assembly 300 away from the top cover assembly 200.

[0053] In this application, since the insulating film 410 at least partially covers the end of the electrode assembly 300 away from the top cover assembly 200 along the height direction z, and the third fixing part 423 is located between the insulating film 410 and the end of the electrode assembly 300 away from the top cover assembly 200, the third fixing part 423 and the electrode assembly 300 can be covered together by the insulating film 410, thereby improving the stability of the connection relationship between the third fixing part 423 and the electrode assembly 300, reducing the possibility of the electrode assembly 300 moving relative to the third fixing part 423, and improving the fixing effect of the insulating fixing member 420 on the electrode assembly 300.

[0054] Reference Figure 3 As shown, the insulating film 410 includes a covering portion 411 and a connecting portion 412. The covering portion 411 covers the electrode assembly 300. The covering portion 411 is connected to the connecting portion 412 at the edge near the first fixing portion 421 and the edge near the second fixing portion 422. The connecting portion 412 near the first fixing portion 421 is bent toward the first fixing portion 421 and is at least partially connected to the first fixing portion 421. The connecting portion 412 near the second fixing portion 422 is bent toward the second fixing portion 422 and is at least partially connected to the second fixing portion 422.

[0055] In this embodiment, the electrode assembly 300 can be covered by the covering portion 411. Simultaneously, since a connecting portion 412 is connected to the edge of the covering portion 411 near the first fixing portion 421, and the connecting portion 412 near the first fixing portion 421 bends towards the first fixing portion 421 and is at least partially connected to it, when the covering portion 411 covers the electrode assembly 300, the connecting portion 412 can connect the covering portion 411 to the first fixing portion 421, thereby improving the stability of the connection between the first fixing portion 421 and the electrode assembly 300. Furthermore, the connecting portion 412 can cover the gap between the covering portion 411 and the first fixing portion 421, thereby improving the insulation of the insulating assembly 400. Similarly, the insulating covering function of the electrode assembly 300 is also achieved because the covering part 411 is connected to the edge near the second fixing part 422 by the connecting part 412, and the connecting part 412 is bent toward the second fixing part 422 and is at least partially connected to the second fixing part 422. Therefore, when the covering part 411 covers the electrode assembly 300, the covering part 411 can be connected to the second fixing part 422 through the connecting part 412, thereby improving the stability of the connection relationship between the second fixing part 422 and the electrode assembly 300. At the same time, the gap between the covering part 411 and the second fixing part 422 can be covered by the connecting part 412, thereby improving the insulating covering function of the insulating assembly 400 on the electrode assembly 300.

[0056] Specifically, refer to Figure 3 As shown, in this embodiment, the end of the covering portion 411 that is close to the top cover assembly 200 along the height direction z at least partially protrudes from the electrode assembly 300, and is bent toward the electrode assembly 300 along the width direction y or the length direction x, and covers the end of the electrode assembly 300 that is close to the top cover assembly 200 along the height direction z, so as to improve the stability of the connection relationship between the insulating film 410 and the electrode assembly 300, and improve the covering stability of the insulating film 410 on the electrode assembly 300.

[0057] Reference Figure 6 as well as Figure 7 As shown, the top cover assembly 200 includes a top cover 210 and a connector 220. The top cover 210 covers the housing 100. The connector 220 is connected to the side of the top cover 210 along the height direction z near the receiving cavity 110 and is received in the receiving cavity 110. The first fixing part 421 and the second fixing part 422 are both fixedly connected to the connector 220.

[0058] In this embodiment, the top cover 210 can be closed onto the housing 100 to define the receiving cavity 110, thereby protecting the electrode assembly 300. Since the connector 220 is connected to the side of the top cover 210 along the height direction z close to the receiving cavity 110 and is housed in the receiving cavity 110, and the first fixing part 421 and the second fixing part 422 are both fixedly connected to the connector 220, the first fixing part 421 and the second fixing part 422 can be connected to the top cover 210 through the connector 220, so that the insulating fixing part 420 can play a supporting and fixing role for the electrode assembly 300.

[0059] Specifically, refer to Figure 7 As shown, in this embodiment, both the first fixing part 421 and the second fixing part 422 are engaged with the connector 220. The connector 220 is provided with a connecting hole 221. Both the first fixing part 421 and the second fixing part 422 are connected to a locking part 424 at one end near the top cover 210 along the height direction z. The locking part 424 passes through the connecting hole 221 and abuts against the edge of the connector 220 located in the connecting hole 221, so as to realize that both the first fixing part 421 and the second fixing part 422 are engaged with the connector 220.

[0060] Specifically, in this embodiment, the thickness of the insulating fastener 420 is greater than the thickness of the insulating film 410.

[0061] In this embodiment, since the thickness of the insulating fastener 420 is greater than the thickness of the insulating film 410, the structural strength of the insulating fastener 420 is greater than that of the insulating film 410. Thus, the insulating fastener 420 can support and fix the electrode assembly 300.

[0062] In addition, in some other embodiments, the thickness of the insulating fastener 420 may not be limited. As long as the hardness of the insulating fastener 420 is greater than the hardness of the insulating film 410, the structural strength of the insulating fastener 420 will be greater than the structural strength of the insulating film 410.

[0063] The electrical device involved in the embodiments of this application includes the battery described above.

[0064] In the electrical device of this application, since the battery described above can improve the fixing effect on the electrode assembly 300, the battery of this application has higher safety performance, so that the electrical device of this application can have higher safety performance.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery, characterized in that, Having a height orientation, the battery includes: case; A top cover assembly fits onto the housing to define a receiving cavity; The electrode assembly is disposed within the receiving cavity; An insulating component is disposed within the receiving cavity. The insulating component includes an insulating film and an insulating fastener. The insulating film covers the electrode assembly. One end of the insulating fastener is connected to the top cover assembly, and the other end of the insulating fastener extends along the height direction to the end of the electrode assembly away from the top cover assembly, and at least partially abuts against the end of the electrode assembly away from the top cover assembly.

2. The battery according to claim 1, characterized in that, The insulating fastener includes a first fixing part, a second fixing part, and a third fixing part. The first fixing part and the second fixing part both extend along the height direction. In the height direction, one end of the first fixing part and the second fixing part are connected to the top cover assembly, and the other end of the first fixing part and the second fixing part are connected to the third fixing part. The third fixing part abuts against the end of the electrode assembly away from the top cover assembly.

3. The battery according to claim 2, characterized in that, The battery also has a length direction and a width direction, the length direction, the width direction and the height direction are perpendicular to each other, the insulating film covers both sides of the electrode assembly along the width direction and one end of the electrode assembly away from the top cover assembly along the height direction, the first fixing part and the second fixing part are spaced apart along the length direction, and the first fixing part and the second fixing part are respectively connected to both ends of the third fixing part along the length direction, and the first fixing part and the second fixing part respectively cover both sides of the electrode assembly along the length direction.

4. The battery according to claim 3, characterized in that, The insulating film covers both sides of the electrode assembly along the length direction and one end of the electrode assembly away from the top cover assembly along the height direction. The first fixing part and the second fixing part are spaced apart along the width direction, and the first fixing part and the second fixing part are respectively connected to both ends of the third fixing part along the width direction. The first fixing part and the second fixing part respectively cover both sides of the electrode assembly along the width direction.

5. The battery according to claim 2, characterized in that, The insulating film at least partially covers one end of the electrode assembly away from the top cover assembly along the height direction, and is located between the third fixing portion and the end of the electrode assembly away from the top cover assembly.

6. The battery according to claim 2, characterized in that, The insulating film at least partially covers one end of the electrode assembly away from the top cover assembly along the height direction, and the third fixing part is located between the insulating film and the end of the electrode assembly away from the top cover assembly.

7. The battery according to claim 2, characterized in that, The insulating film includes a covering portion and a connecting portion. The covering portion covers the electrode assembly. The covering portion is connected to the edge near the first fixing portion and the edge near the second fixing portion. The connecting portion near the first fixing portion is bent toward the first fixing portion and is at least partially connected to the first fixing portion. The connecting portion near the second fixing portion is bent toward the second fixing portion and is at least partially connected to the second fixing portion.

8. The battery according to claim 2, characterized in that, The top cover assembly includes a top cover and a connector. The top cover is fitted onto the housing. The connector is connected to the side of the top cover near the receiving cavity along the height direction and is received within the receiving cavity. The first fixing part and the second fixing part are both fixedly connected to the connector.

9. The battery according to claim 1, characterized in that, The thickness of the insulating fastener is greater than the thickness of the insulating film.

10. An electrical appliance, characterized in that, include: The battery as described in any one of claims 1-9.

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