CN217788654U

CN217788654U - Battery device

Info

Publication number: CN217788654U
Application number: CN202221946491.5U
Authority: CN
Inventors: 关俊山; 谷亮杰; 颜廷露
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-11-11
Anticipated expiration: 2032-07-26

Abstract

The utility model relates to a battery technology field especially relates to a battery device, and battery device includes battery and insulating support, and insulating support sets up in two at least adjacent surfaces of battery, and insulating support includes two at least parts, and two at least part blocks of insulating support are connected. Through the structure design, the utility model discloses when utilizing insulating support to provide insulating protection for the battery, can utilize the joint of two at least parts to connect the assembly degree of difficulty that reduces insulating support, promote the assembly precision, avoid insulating support to produce in the assembling process and warp to guarantee assembly effect and structural strength.

Description

Battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery device.

Background

In the existing battery device, an insulating support is provided at an end of the battery for realizing an insulating function of the end of the battery. However, the insulating support of the existing battery device covers multiple surfaces of the battery, so that the battery assembly difficulty is high, the assembly precision is poor, and the insulating support is easy to deform in the assembly process to influence the assembly effect and the structural strength.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides an insulating support assembly is convenient, the assembly precision is higher and be difficult for producing the battery device that warp.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to an aspect of the present invention, there is provided a battery device, wherein, the battery device comprises a battery and an insulating support, the insulating support is disposed on at least two adjacent surfaces of the battery, the insulating support comprises at least two parts, and at least two parts of the insulating support are connected in a clamping manner.

According to the above technical scheme, the utility model provides a battery device's advantage lies in with positive effect:

the utility model provides an insulating support of battery device sets up in two at least adjacent surfaces of battery, and insulating support includes two at least parts that the block is connected. Through the structure design, the utility model discloses when utilizing insulating support to provide insulating protection for the battery, can utilize the joint of two at least parts to connect the assembly degree of difficulty that reduces insulating support, promote the assembly precision, avoid insulating support to produce in assembling process and warp to guarantee assembly effect and structural strength.

Drawings

Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is a schematic perspective view showing a partial structure of a battery device according to an exemplary embodiment;

fig. 2 is an enlarged schematic view of a portion a in fig. 1;

FIG. 3 is a perspective view of a portion of the structure shown in FIG. 1;

FIG. 4 is an exploded perspective view of FIG. 3;

FIG. 5 is an exploded perspective view of the insulating holder shown in FIG. 4;

fig. 6 is an enlarged schematic view of a portion a in fig. 5;

fig. 7 is a partially enlarged schematic view of an insulating support of a battery device according to another exemplary embodiment;

fig. 8 is a partially enlarged schematic view of an insulating support of a battery device according to another exemplary embodiment;

fig. 9 is a partial plan view showing a partial structure of a battery device according to another exemplary embodiment.

The reference numerals are explained below:

100. a battery;

101. a top surface;

103. a first side surface;

104. a second side surface;

110. a flange structure;

200. an insulating support;

201. a first part;

2011. a third sub-section;

2012. a connecting portion;

2013. a clamping part;

202. a second section;

2021. a first sub-section;

2022. a second sub-section;

2023. a first groove portion;

2024. a second groove portion;

D. a distance;

G1. a gap;

G2. a gap;

G3. a gap;

x. a first direction;

y. a second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

Referring to fig. 1, a schematic perspective view of a partial structure of a battery device according to the present invention is representatively illustrated. In this exemplary embodiment, the battery device provided by the present invention is described taking an in-vehicle battery as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the embodiments described below in order to utilize the inventive concepts of the present invention in other types of battery devices, and still fall within the scope of the principles of the present invention.

As shown in fig. 1, in an embodiment of the present invention, the battery device includes a battery 100 and an insulating support 200. Referring to fig. 2 to 6 in combination, fig. 2 representatively illustrates an enlarged schematic view of portion a of fig. 1; fig. 3 is a perspective view typically illustrating a part of the structure shown in fig. 1, in which a first portion 201 of the insulating support 200 disposed on the top surface 101 of the battery 100 is hidden; representatively illustrated in fig. 4 is the exploded isometric view of fig. 3; representatively illustrated in fig. 5 is an exploded perspective view of the insulating support 200 illustrated in fig. 4; an enlarged schematic view of a portion B in fig. 5 is representatively illustrated in fig. 6. The structure, connection mode and functional relationship of the main components of the battery device provided by the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 and 2, in an embodiment of the present invention, the insulating support 200 is disposed on at least two adjacent surfaces of the battery 100, and the insulating support 200 includes at least two portions, and at least two portions of the insulating support 200 are engaged with each other. For example, the first and

second portions

201 and 202 of the insulating support 200 shown in the drawings are disposed on the top surface 101 and the side surfaces of the battery 100, respectively. Through the structure design, the utility model discloses when utilizing insulating support 200 to provide insulating protection for battery 100, can utilize the joint of two at least parts to connect the assembly degree of difficulty that reduces insulating support 200, promote the assembly precision, avoid insulating support 200 to produce in the assembling process and warp to guarantee assembly effect and structural strength.

As shown in fig. 1 to 4, in an embodiment of the present invention, the surface of the battery 100 includes a top surface 101, a bottom surface, two first side surfaces 103, and two second side surfaces 104. Specifically, the two first side surfaces 103 are perpendicular to the first direction X and spaced apart from each other along the first direction X, the two second side surfaces 104 are perpendicular to the second direction Y and spaced apart from each other along the second direction Y, and the second direction Y is perpendicular to the first direction X. On this basis, the insulating support 200 may be disposed on the top surface 101, the bottom surface, and the two second side surfaces 104 of the battery 100. In some embodiments, the insulating support 200 may also be disposed on the two second side surfaces 104 of the battery 100, or may be disposed on one of the top surface 101 and the bottom surface of the battery 100 and the two second side surfaces 104, etc., all of which are not limited in this embodiment.

As shown in fig. 4 and 5, based on the structural design that the insulating support 200 is disposed on the top surface 101, the bottom surface, and the two second side surfaces 104 of the battery 100, in an embodiment of the present invention, at least two portions of the insulating support 200 may include two first portions 201 and two second portions 202. Specifically, the two first portions 201 are disposed on the top surface 101 and the bottom surface of the battery 100, respectively, and the two second portions 202 are disposed on the two second side surfaces 104 of the battery 100, respectively. In addition, the first portion 201 and the second portion 202 are engaged with each other. Through the structure design, the utility model discloses adopt the structure of a plurality of parts with insulating support 200, utilize insulating support 200's different parts and a plurality of position contact on battery 100 surface, be favorable to reducing insulating support 200 and battery 100's the assembly degree of difficulty, promote assembly efficiency.

As shown in fig. 5 and 6, based on the structural design that the insulating bracket 200 includes the first portion 201 and the second portion 202, in an embodiment of the present invention, the second portion 202 of the insulating bracket 200 may include the first sub-portion 2021 and the two second sub-portions 2022 which are integrated. Specifically, the first sub-portion 2021 contacts the second side surface 104 of the battery 100, the two second sub-portions 2022 contact the top surface 101 and the bottom surface of the battery 100, respectively, and the two second sub-portions 2022 are engaged with the two first portions 201, respectively. In other words, one second sub-portion 2022 and one first portion 201 of each of the two second portions 202 are disposed on the top surface 101 of the battery 100, and the other second sub-portion 2022 and the other first portion 201 of each of the two second portions 202 are disposed on the bottom surface of the battery 100. For example, the second portion 202 may be generally "v 21274". Through the structure design, the utility model discloses can set up the hookup location of first portion 201 and second portion 202 in the region that corresponds battery 100 top surface 101 and bottom surface, avoid the hookup location of first portion 201 and second portion 202 to be located the corner portion of battery 100 and lead to the assembly difficulty.

Referring to fig. 7, an enlarged partial schematic view of an insulating support 200 in another exemplary embodiment of a battery device consistent with the principles of the present invention is representatively illustrated in fig. 7.

As shown in fig. 7, taking the structure design that the second portion 202 includes the first sub-portion 2021 and the second sub-portion 2022 as an example, in an embodiment of the present invention, a gap G2 may be formed at a connection portion of the first portion 201 and the second sub-portion 2022 along the second direction Y. Through the structure design, the utility model discloses can avoid insulating support 200, especially its first portion 201 hunches in the installation and produces and warp, further guarantee insulating support 200's structural strength and structural stability.

Referring to fig. 8, an enlarged partial schematic view of an insulating support 200 in another exemplary embodiment of a battery device consistent with the principles of the present invention is representatively illustrated in fig. 8.

As shown in fig. 8, based on the structural design that the insulating bracket 200 includes the first portion 201 and the second portion 202, in an embodiment of the present invention, the first portion 201 may include a plurality of third sub-portions 2011, and the third sub-portions 2011 are sequentially arranged along the second direction Y and sequentially engaged with each other. With the above-described structural design, since the lengths of the top surface 101 and the bottom surface of the battery 100 in the second direction Y are long, the length of the first portion 201 of the insulating support 200 is long, and particularly when the insulating support 200 is used to contact the surface of one battery 100, the first portion 201 may have an elongated structure. Therefore, the utility model discloses can be the multistage with insulating support 200's first portion 201, avoid the damage of in-process such as transportation storage.

As shown in fig. 8, based on the structural design that the first portion 201 includes a plurality of third sub-portions 2011, in an embodiment of the present invention, along the second direction Y, a gap G3 may be formed at a joint of two adjacent third sub-portions 2011. Through the structure design, the utility model discloses can avoid insulating support 200, especially a plurality of third sub-portions 2011 of its first portion 201 to arch up and produce the deformation in the installation, further guarantee insulating support 200's structural strength and structural stability.

As shown in fig. 2, based on the structural design that the insulating support 200 includes the first portion 201 and the second portion 202, in an embodiment of the present invention, the battery device includes a plurality of batteries 100 arranged along the first direction X. On this basis, the first portions 201 of the insulating supports 200 of two adjacent batteries 100 may have a gap G1 therebetween, and the second portions 202 of the insulating supports 200 of two adjacent batteries 100 may abut against each other. Through the structure design, the utility model discloses a plurality of batteries 100 can fix a position each other through insulating support 200's second portion 202, because the excessive pressure is realized at the middle part of battery 100, consequently gapped in the middle part, can make things convenient for the excessive pressure.

As shown in fig. 2, based on the structural design of the gap G1 between the first portions 201 of the insulating supports 200 of two adjacent batteries 100, in an embodiment of the present invention, the gap G1 between the first portions 201 of the insulating supports 200 of two adjacent batteries 100 may be 0.1mm to 1.5mm, for example, 0.1mm, 1mm, 1.2mm, 1.5mm, etc. Through the structure design, the utility model discloses can utilize above-mentioned clearance G1's structural design to make things convenient for excessive pressure, also can prevent excessive pressure, can control the excessive pressure scope. In some embodiments, the gap G1 between the first portions 201 of the insulating supports 200 of two adjacent batteries 100 may also be less than 0.1mm, or may be greater than 1.5mm, such as 0.05mm, 1.6mm, and the like, which is not limited to the present embodiment.

Specifically, in an embodiment of the present invention, the gap G1 between the first portions 201 of the insulating supports 200 of two adjacent batteries 100 may be preferably 0.3mm to 0.5mm, for example, 0.3mm, 0.4mm, 0.5mm, and the like.

Referring to fig. 9, a partial top view of a portion of another exemplary embodiment of a battery device according to the principles of the present invention is representatively illustrated in fig. 9.

As shown in fig. 9, based on the structural design that the first portions 201 of the insulating supports 200 of two adjacent batteries 100 have a gap G1 therebetween, in an embodiment of the present invention, the side of the battery 100 adjacent to one first surface is provided with a flange structure 110. On this basis, along the first direction X, the other first surface of the battery 100 protrudes from the side of the insulating support 200 away from the flange structure 110, and the protruding distance D may be 0.1mm to 1.5mm, for example, 0.1mm, 1mm, 1.2mm, 1.5mm, and the like.

As shown in fig. 5 and 6, in an embodiment of the present invention, a clamping structure may be disposed between at least two portions of the insulating support 200, and the at least two portions of the insulating support 200 may be clamped and connected by the clamping structure. Through the structure design, the utility model discloses can make each part of insulating support 200 be convenient for assemble.

As shown in fig. 5 and fig. 6, the structural design that at least two parts based on insulating support 200 are connected through the block structure is that the block structure can include a clamping groove and a clamping block, the clamping groove and the clamping block are respectively arranged on at least two parts of insulating support 200, and the clamping groove and the clamping block are matched in a clamping manner. For example, taking one first portion 201 and one second portion 202 which are connected in a clamping manner as an example, the clamping groove may be disposed on the second portion 202, and the clamping block may be disposed on the first portion 201. In some embodiments, the locking groove may also be disposed on the first portion 201, and the locking block may also be disposed on the second portion 202.

As shown in fig. 6, based on the structural design of the engaging structure including the engaging groove and the engaging block, in an embodiment of the present invention, the engaging groove may include a first groove portion 2023 and a second groove portion 2024, one end of the first groove portion 2023 is open to an end of one portion (e.g., the second sub-portion 2022 of the second portion 202 shown in the figure) of the insulating bracket 200, the other end of the first groove portion 2023 is connected to the second groove portion 2024, and the width of the second groove portion 2024 is greater than the width of the first groove portion 2023. Correspondingly, the fixture block may include a connecting portion 2012 and a clamping portion 2013, one end of the connecting portion 2012 is connected to an end of another portion (e.g., the first portion 201 shown in the drawing) of the insulating bracket 200, the other end of the connecting portion 2012 extends toward the clamping slot, the clamping portion 2013 is disposed at the other end of the connecting portion 2012, an outer diameter of the clamping portion 2013 is greater than the width of the first groove portion 2023 and less than or equal to the width of the second groove portion 2024, and an outer diameter of the connecting portion 2012 is less than or equal to the width of the first groove portion 2023. Through the structure design, the utility model discloses can utilize the above-mentioned block structure of draw-in groove and fixture block, realize that two parts of insulating support 200 are fixed at the relative block on first direction X and second direction Y.

As shown in fig. 7 and 8, based on the structural design that the card slot includes the first groove portion 2023 and the card block includes the connecting portion 2012, in an embodiment of the present invention, the notch of the first groove portion 2023 is located on a surface of a portion (e.g., the second sub-portion 2022 of the second portion 202 shown in the drawing) of the insulating bracket 200 facing the battery 100, and the width of the notch is smaller than the width of the groove cavity of the first groove portion 2023 and smaller than the outer diameter of the connecting portion 2012, thereby being capable of limiting the card block in a direction perpendicular to the surface of the battery 100.

As shown in fig. 6 to 8, based on the structural design that the card slot includes the first groove portion 2023 and the card block includes the connecting portion 2012, in an embodiment of the present invention, a cross section of the first groove portion 2023 taken by a plane perpendicular to an extending direction of the connecting portion 2012 may be substantially arc-shaped, and a cross section of the connecting portion 2012 taken by a plane perpendicular to the extending direction of the connecting portion 2012 may be substantially arc-shaped to match the cross section of the first groove portion 2023. Through the structure design, when first slot portion 2023 adopts the structure design that the notch width is less than the external diameter of connecting portion 2012, the utility model discloses can make connecting portion 2012 go into first slot portion 2023 via the notch of first slot portion 2023 more conveniently laborsavingly to be convenient for process. In some embodiments, a cross section of the first groove portion 2023 taken by a plane perpendicular to the extending direction of the connecting portion 2012 may also be in other shapes, such as a rectangle, a trapezoid, etc., and a cross section of the connecting portion 2012 taken by a plane perpendicular to the extending direction of the connecting portion 2012 may be substantially in an arc shape or a trapezoid matching the cross section of the first groove portion 2023, thereby preventing the connecting portion 2012 from rotating relative to the first groove portion 2023 when passing through the first groove portion 2023, and further optimizing the stability of the engaging connection.

As shown in fig. 6, based on the structural design that the card slot includes the second slot portion 2024 and the card block includes the clamping portion 2013, in an embodiment of the present invention, a cross section of the second slot portion 2024 taken by a plane perpendicular to the extending direction of the connecting portion 2012 may be substantially rectangular. In some embodiments, a portion of the groove wall of the second groove portion 2024 may be substantially arc-shaped, and a portion of the outer wall of the snap-in portion 2013 may be substantially arc-shaped to match the shape of the groove wall of the second groove portion 2024.

As shown in fig. 6 to 8, based on the structural design that the engaging structure includes the engaging groove and the engaging block, in an embodiment of the present invention, a side of the engaging block facing or away from the battery 100 may be a planar structure. And, this side that the fixture block is planar structure can with the surperficial parallel and level of the one side that corresponds of insulating support 200, can avoid opening protrusion in insulating support 200 surface and occupy extra space in view of the above, can promote structural integrity simultaneously.

As shown in fig. 6 to 8, based on the structural design that the engaging structure includes the engaging groove and the engaging block, in an embodiment of the present invention, the notch of the engaging groove may be located on a side of the insulating support 200 opposite to the battery 100. Through the structure design, the utility model discloses can be convenient for including the insulating support 200 of a plurality of parts is the equipment at the battery surface, promotes the assembly convenience.

In an embodiment of the present invention, the surface of the battery 100 may be provided with an insulating film, at least a portion of the insulating film overlaps the insulating support 200, and the insulating film is located between the insulating support 200 and the battery 100. Through the structure design, the utility model discloses can further optimize the insulation protection to battery 100. In some embodiments, the arrangement region of the insulating film on the surface of the battery 100 may also avoid the insulating support 200, for example, when the insulating supports 200 are only disposed at two end portions of the battery 100 along the second direction Y, which is similar to the case where the insulating support 200 only includes the second portion 202 shown in the drawings, the insulating film may be only disposed in a middle region of the battery 100 along the second direction Y, that is, the insulating film does not overlap with the insulating support 200, and of course, an edge of the insulating film along the second direction Y may abut against the insulating support 200 at this time, so as to avoid directly exposing a part of the surface of the battery 100.

Based on the structural design that the surface of the battery 100 is provided with the insulating film, in an embodiment of the present invention, a portion of the insulating support 200 may be disposed on the bottom surface of the battery 100. On this basis, at least a part of the insulating film may be located between the bottom surface of the battery 100 and the insulating support 200. Through the structure design, the utility model discloses can promote the insulation protection to the bottom surface of battery 100 at least.

It is noted herein that the battery devices illustrated in the drawings and described in this specification are merely a few examples of the wide variety of battery devices that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any of the details or any of the components of the battery device shown in the drawings or described in the specification.

To sum up, the utility model provides an insulating support 200 of battery device sets up in two at least adjacent surfaces of battery 100, and insulating support 200 includes two at least parts that the block is connected. Through the structure design, the utility model discloses when utilizing insulating support 200 to provide insulating protection for battery 100, can utilize the joint of two at least parts to connect the assembly degree of difficulty that reduces insulating support 200, promote the assembly precision, avoid insulating support 200 to produce in the assembling process and warp to guarantee assembly effect and structural strength.

Exemplary embodiments of the battery device proposed by the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the proposed battery device has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. The battery device is characterized by comprising a battery and an insulating support, wherein the insulating support is arranged on at least two adjacent surfaces of the battery, the insulating support comprises at least two parts, and the at least two parts of the insulating support are connected in a clamping mode.

2. The battery device of claim 1, wherein the surface of the battery comprises a top surface, a bottom surface, two first side surfaces and two second side surfaces, the two first side surfaces are perpendicular to and spaced apart from each other in a first direction, the two second side surfaces are perpendicular to and spaced apart from each other in a second direction, the second direction is perpendicular to the first direction; the insulating support is arranged on the top surface, the bottom surface and the two second side surfaces of the battery.

3. The battery device of claim 2, wherein the at least two portions of the insulating support comprise two first portions disposed on the top and bottom surfaces of the battery, respectively, and two second portions disposed on two second side surfaces of the battery, respectively.

4. The battery device as claimed in claim 3, wherein the second portion includes a first sub-portion and two second sub-portions, the first sub-portion is disposed on a second side of the battery, and the two second sub-portions are disposed on a top surface and a bottom surface of the battery respectively and are connected to the two first portions in a snap-fit manner.

5. The battery device of claim 4, wherein a connection of the first portion and the second sub-portion has a gap along the second direction.

6. The battery device of claim 3, wherein the first portion comprises a plurality of third sub-portions sequentially arranged along the second direction and sequentially snap-connected.

7. The battery device as claimed in claim 6, wherein, in the second direction, a gap is formed at a connection between two adjacent third sub-portions.

8. The battery device according to claim 3, comprising a plurality of said batteries arranged in a first direction; gaps are reserved between the first portions of the insulating supports of the two adjacent batteries, and the second portions of the insulating supports of the two adjacent batteries are connected in a butt joint mode.

9. The battery device according to claim 8, wherein a gap between the first portions of the insulating supports of two adjacent batteries is 0.1mm to 1.5mm.

10. The battery device of claim 9, wherein a side of the battery adjacent one of the first surfaces is provided with a flange structure; and along the first direction, the other first surface of the battery protrudes out of one side of the insulating support far away from the flange structure, and the protruding distance is 0.1-1.5 mm.

11. The battery device according to any one of claims 1 to 10, wherein a snap-fit structure is provided between at least two portions of the insulating support, and the at least two portions of the insulating support are snap-fit connected by the snap-fit structure.

12. The battery device according to claim 11, wherein the engaging structure comprises a engaging groove and a locking block, the engaging groove and the locking block are respectively disposed on at least two portions of the insulating bracket, and the engaging groove and the locking block are engaged with each other.

13. The battery device according to claim 12, wherein the card slot includes a first slot portion having one end opened to an end portion of one portion of the insulating holder, and a second slot portion communicating with an end of the first slot portion facing away from the end portion, the second slot portion having a width larger than that of the first slot portion; the fixture block comprises a connecting portion and a clamping portion, one end of the connecting portion is connected to the end portion of the other portion of the insulating support, the other end of the connecting portion faces the clamping groove and extends, the clamping portion is arranged at the other end of the connecting portion, the outer diameter of the clamping portion is larger than the width of the first groove portion and smaller than or equal to the width of the second groove portion, and the outer diameter of the connecting portion is smaller than or equal to the width of the first groove portion.

14. The battery device according to claim 13, wherein the notch of the first groove portion is located on a surface of a portion of the insulating holder facing the battery, and the width of the notch is smaller than the width of the groove cavity of the first groove portion and smaller than the outer diameter of the connecting portion for limiting the latch in a direction perpendicular to the surface of the battery.

15. The battery device according to claim 13, wherein:

the first groove part is rectangular in cross section taken by a plane perpendicular to the extending direction of the connecting part, and the connecting part is rectangular in cross section taken by a plane perpendicular to the extending direction of the connecting part and matched with the cross section of the first groove part; or

The first groove portion is arc-shaped in cross section cut by a plane perpendicular to the extending direction of the connecting portion, and the connecting portion is arc-shaped matched with the cross section of the first groove portion in cross section cut by a plane perpendicular to the extending direction of the connecting portion.

16. The battery device according to claim 13, wherein a cross section of the second groove portion taken in a plane perpendicular to an extending direction of the connection portion is rectangular.

17. The battery device as claimed in claim 13, wherein a portion of the groove wall of the second groove portion is arc-shaped, and a portion of the outer wall of the engaging portion is arc-shaped to match the shape of the groove wall of the second groove portion.

18. The battery device as claimed in claim 12, wherein the side of the latch facing toward or away from the battery is a planar structure.

19. The battery device of claim 12, wherein the notch of the slot is located on a side of the insulating support facing away from the battery.

20. The battery device according to any one of claims 1 to 10, wherein the battery surface is provided with an insulating film, and at least a part of the insulating film overlaps with the insulating support.

21. The battery device according to claim 20, wherein a portion of the insulating support is disposed on a bottom surface of the battery, and at least a portion of the insulating film is located between the bottom surface of the battery and the insulating support.