Cylindrical battery and electronic equipment

Abstract

The utility model discloses a cylindrical battery and an electronic device, the cylindrical battery comprises: a housing, an opening at a first end of the housing is provided with an annular connection portion extending along a radial direction of the housing; the winding core is arranged in the shell, the winding core is provided with a first tab and a second tab, and the first tab is electrically connected with the shell; the first side of the insulating part is arranged on the inner side of the end cover, the second side of the insulating part is arranged on the side, away from the second end of the shell, of the annular connecting part, and the insulating part is connected with the annular connecting part and the end cover. According to the cylindrical battery disclosed by the invention, the end cover and the annular connecting part of the shell can be directly connected together through the arranged insulating part, so that the shell does not need to be provided with a closing-up structure for fixing the end cover, the axial size of the cylindrical battery is remarkably reduced, the energy density of the cylindrical battery is favorably improved, and the cylindrical battery is simple in structure and convenient to produce and manufacture.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a cylindrical battery and electronic equipment. BACKGROUND

[0002] The cylindrical battery is mainly composed of a metal shell, a metal end cover, a roll core and an insulating sealing element. The insulating sealing element is arranged between the shell and the end cover. The above-mentioned battery usually adopts a shell closing-in mode to fix the end cover. However, this closing-in fixing mode will cause the axial size of the battery to increase and make the structure of the battery relatively complex. SUMMARY

[0003] One object of the utility model is to provide a new technical scheme of a cylindrical battery, which can at least solve the technical problem of large axial size of the existing cylindrical battery.

[0004] Another object of the utility model is to provide a new technical scheme of an electronic device.

[0005] According to the first aspect of the utility model, a cylindrical battery is provided, which comprises a shell, an annular connecting part extending in the radial direction of the shell is arranged at the opening of the first end of the shell; a roll core is arranged in the shell, the roll core is provided with a first tab and a second tab, and the first tab is electrically connected with the shell; an insulating element and an end cover, the first side of the insulating element is arranged on the inner side of the end cover, the second side of the insulating element is arranged on the side of the annular connecting part away from the second end of the shell, and the insulating element connects the annular connecting part and the end cover.

[0006] Optionally, the first side of the insulating element is provided with a first plastic layer, the first plastic layer is fused to the end cover; and / or the second side of the insulating element is provided with a second plastic layer, the second plastic layer is fused to the annular connecting part.

[0007] Optionally, the insulating element is configured as a plastic element, and the plastic element is fused to the annular connecting part and the end cover.

[0008] Optionally, the side of the annular connecting part away from the second end of the shell is provided with a first annular protruding rib, the first annular protruding rib cooperates with the end cover to compress the insulating element; and / or the inner side of the end cover is provided with a second annular protruding rib, the second annular protruding rib cooperates with the annular connecting part to compress the insulating element.

[0009] Optionally, the first annular protruding rib and / or the second annular protruding rib is configured as a pressing rib.

[0010] Optionally, the shell is provided with a necking portion having a first wall body and a second wall body oppositely arranged in the axial direction of the shell, wherein the first wall body is formed as the annular connecting portion, and the second wall body cooperates with the second end of the shell to define the position of the winding core in the axial direction of the shell.

[0011] Optionally, the cylindrical battery further comprises a support body filled between the first wall body and the second wall body to support the first wall body.

[0012] Optionally, the support body is configured as an insulator which is attached to one end of the end cap close to the second end of the shell.

[0013] Optionally, the support body has the same radial dimension as the shell and the end cap.

[0014] According to a second aspect of the present application, an electronic device is provided, comprising the cylindrical battery according to any one of the above aspects.

[0015] According to the cylindrical battery of the present application, the annular connecting portion of the end cap and the shell can be directly connected together by the insulator, so that the shell does not need to be provided with a closing structure for fixing the end cap, thereby significantly reducing the axial dimension of the cylindrical battery, which is beneficial to improve the energy density of the cylindrical battery, and the structure is simple and convenient for production and manufacturing.

[0016] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0018] Figure 1 is a structure explosion view of a cylindrical battery according to an embodiment provided by the present application;

[0019] Figure 2 is a front view of a cylindrical battery according to an embodiment provided by the present application;

[0020] Figure 3 is Figure 2 a sectional view at the center line C-C.

[0021] REFERENCE NUMERALS:

[0022] 100, cylindrical battery;

[0023] 10, shell; 11, necking portion; 11a, annular connecting portion; 11b, second wall body;

[0024] 20, core; 21, first tab; 22, second tab;

[0025] 30, insulating member; 40, end cap; 41, second annular protrusion;

[0026] 50, support body; 60, first insulating pad; 70, second insulating pad. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments are illustrative only and do not limit the scope of the present application unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0029] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as being part of the specification.

[0030] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0031] It should be noted that like references and characters herein relate to like items throughout the figures, and once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0032] A cylindrical battery 100 according to an embodiment of the present application will now be described in detail with reference to the accompanying drawings.

[0033] As shown in the drawings, the cylindrical battery 100 according to an embodiment of the present application includes a case 10, a core 20, an insulating member 30, and an end cap 40. Figures 1 to 3 Specifically, the case 10 has an annular connecting portion 11a extending radially at the opening of the first end thereof, the core 20 is disposed in the case 10, the core 20 has a first tab 21 and a second tab 22, the first tab 21 is electrically connected to the case 10, a first side of the insulating member 30 is disposed inside the end cap 40, a second side of the insulating member 30 is disposed on the side of the annular connecting portion 11a facing away from the second end of the case 10, and the insulating member 30 connects the annular connecting portion 11a and the end cap 40.

[0034] In other words, as shown in the drawings, the cylindrical battery 100 according to an embodiment of the present application includes a case 10, a core 20, an insulating member 30, and an end cap 40.

[0035] Figures 1 to 3 ​As shown, the cylindrical battery 100 according to the embodiment of the utility model mainly comprises a shell 10, a roll core 20, an insulating piece 30 and an end cover 40, wherein the shell 10 can be configured as an integrally formed steel shell structure, the first end (for example, the upper end) of the shell 10 is provided with an opening, and the first end of the shell 10 is provided with an annular connecting part 11a extending towards the inner side or the outer side in the radial direction thereof, and the roll core 20 can be installed in the shell 10 from the opening of the first end of the shell 10. The roll core 20 has a first tab 21 and a second tab 22, the first tab 21 can be a negative tab, and the second tab 22 can be a negative tab, the first tab 21 can be connected (for example, welded) with the inner wall surface of the second end of the shell 10, so that the first tab 21 and the shell 10 form an electrical connection. The insulating piece 30 has a first side and a second side arranged opposite in the thickness direction thereof, the first side of the insulating piece 30 is arranged on the inner side of the end cover 40, and the insulating piece 30 can be provided with a relief hole penetrating in the thickness direction thereof, so that the second tab 22 of the roll core 20 can pass through the insulating piece 30 from the relief hole and be connected (for example, welded) with the end cover 40, so that the second tab 22 and the end cover 40 form an electrical connection.

[0036] In the embodiment, the second side of the insulating piece 30 is arranged on the side (that is, the upper side of the annular connecting part 11a) of the annular connecting part 11a away from the second end of the shell 10, and the annular connecting part 11a and the end cover 40 are connected together through the insulating piece 30, that is, the first side of the insulating piece 30 is connected with the end cover 40, and the second side of the insulating piece 30 is connected with the annular connecting part 11a, so as to realize the sealed connection of the shell 10 and the end cover 40.

[0037] Therefore, according to the cylindrical battery 100 of the embodiment of the utility model, the annular connecting part 11a of the shell 10 and the end cover 40 can be directly connected together through the insulating piece 30 arranged, so that the shell 10 does not need to be provided with a closing structure for fixing the end cover 40, thereby significantly reducing the axial dimension of the cylindrical battery 100, which is beneficial to improve the energy density of the cylindrical battery 100, and the structure is simple and convenient for production and manufacturing.

[0038] According to one embodiment of the utility model, the first side of the insulating piece 30 is provided with a first plastic layer, and the first plastic layer is fused to the end cover 40; and / or, the second side of the insulating piece 30 is provided with a second plastic layer, and the second plastic layer is fused to the annular connecting part 11a.

[0039] In other words, at least the first and second sides of the insulating member 30 are made of plastic material. For example, the first side of the insulating member 30 is provided with a first plastic layer. When connecting the insulating member 30 and the end cap 40, the first plastic layer can be melted by ultrasonic welding, thereby fusing the first plastic layer to the end cap 40, thus realizing the connection between the insulating member 30 and the end cap 40. The second side of the insulating member 30 is provided with a second plastic layer. When connecting the insulating member 30 and the annular connecting part 11a, the second plastic layer can be melted by ultrasonic welding, thereby fusing the second plastic layer to the annular connecting part 11a, thus realizing the connection between the insulating member 30 and the annular connecting part 11a.

[0040] In this embodiment, the insulating component 30 is fused to the housing 10 and the annular connecting part 11a, which has a simple structure and does not require additional fasteners or adhesives, thus reducing production costs and complexity.

[0041] In some specific embodiments of this utility model, the insulating member 30 is configured as a plastic member, which is fused to the annular connecting portion 11a and the end cap 40.

[0042] Specifically, the insulating part 30 is a plastic part made of plastic material. When assembling the cylindrical battery 100, the plastic part is located between the end cap 40 and the annular connecting part 11a. When connecting the end cap 40 and the annular connecting part 11a through the plastic part, the plastic is melted by ultrasonic welding. In this way, the plastic part can be fused to the annular connecting part 11a and the end cap 40, thereby realizing the connection between the end cap 40 and the annular connecting part 11a. The structure is simple and does not require additional fasteners or adhesives, which reduces production costs and complexity.

[0043] According to one embodiment of the present invention, a first annular rib is provided on the side of the annular connecting portion 11a away from the second end of the housing 10, and the first annular rib cooperates with the end cap 40 to compress the insulating member 30; and / or, a second annular rib 41 is provided on the inner side of the end cap 40, and the second annular rib 41 cooperates with the annular connecting portion 11a to compress the insulating member 30.

[0044] In other words, such as Figure 3 As shown, to improve the sealing performance of the cylindrical battery 100, one or more first annular ribs are provided on the side of the annular connecting portion 11a away from the second end of the housing 10. The first annular ribs surround the opening at the first end of the housing 10. By cooperating with the end cap 40, the first annular ribs can compress the insulating member 30, thereby effectively improving the sealing performance of the cylindrical battery 100. Furthermore, one or more second annular ribs 41 are provided on the inner side of the end cap 40, corresponding to the position of the annular connecting portion 11a. The second annular ribs 41 surround the opening at the first end of the housing 10. By cooperating with the annular connecting portion 11a, the second annular ribs 41 can compress the insulating member 30, thereby effectively improving the sealing performance of the cylindrical battery 100.

[0045] In some specific embodiments of this utility model, the first annular rib and / or the second annular rib 41 are configured as pressure ribs.

[0046] In other words, such as Figure 3 As shown, after the insulating member 30 connects the annular connecting part 11a and the end cap 40, a first annular groove can be pressed out on the side of the annular connecting part 11a near the second end of the housing 10 by means of stamping or the like, so that a rib is formed on the other side of the annular connecting part 11a, which can serve as a first annular rib; and a second annular groove can be pressed out on the end of the end cap 40 away from the second end of the housing 10 by means of stamping or the like, so that a rib is formed on the inner side of the end cap 40, which can serve as a second annular rib 41.

[0047] In this embodiment, by setting the first annular rib and / or the second annular rib 41 as a pressure rib, it is beneficial to quickly compress the insulating part 30, which facilitates production and manufacturing and can effectively reduce the production cost of the cylindrical battery 100.

[0048] According to one embodiment of the present invention, the housing 10 is provided with a neck 11, the neck 11 having a first wall and a second wall 11b disposed opposite to each other in the axial direction of the housing 10, wherein the first wall is formed as an annular connecting portion 11a, and the second wall 11b cooperates with the second end of the housing 10 to define the position of the core 20 in the axial direction of the housing 10.

[0049] In other words, such as Figure 3 As shown, after the core 20 is placed in the housing 10, a groove can be made on the side wall of the housing at a height higher than the core 20. The groove can form a neck 11 in the housing 10. The neck 11 has a first wall and a second wall 11b arranged opposite to each other in the axial direction of the housing 10. The first wall is away from the second end of the housing 10 and can serve as an annular connecting part 11a. The second wall 11b is close to the second end of the housing 10. The position of the core 20 can be defined by the cooperation between the second wall 11b and the wall of the second end of the housing 10, so that no other structure for fixing the core 20 is required.

[0050] like Figure 3As shown, in some optional examples of the present application, the cylindrical battery 100 further comprises a first insulating pad 60 and a second insulating pad 70, wherein the first insulating pad 60 is arranged in a ring shape and is installed between the first end (for example, the upper end) of the winding core 20 and the second wall body 11b, effectively preventing the first end of the winding core 20 from directly contacting the shell 10, thereby avoiding the potential short circuit risk, and also eliminating the need to additionally install other insulating structures on the shell 10 or the winding core 20. Further, the second insulating pad 70 is arranged in a circular shape and is installed between the second end (for example, the lower end) of the winding core 20 and the inside bottom of the shell 10, effectively preventing the second end of the winding core 20 from directly contacting the shell 10, further reducing the possibility of short circuit, and also simplifying the structural design of the battery, without the need to additionally add insulating components on the shell 10 or the winding core 20.

[0051] In some specific embodiments of the present application, the cylindrical battery 100 further comprises a support body 50, which is filled between the first wall body and the second wall body 11b to support the first wall body.

[0052] Specifically, as Figure 3 shown, the necked portion 11 is sleeved with the support body 50, which is tightly filled in the gap between the first wall body and the second wall body 11b, thereby being able to effectively support the first wall body and prevent it from deforming in the direction of the second wall body 11b due to external force, which is conducive to ensuring the stability of the overall structure of the cylindrical battery 100.

[0053] According to an embodiment of the present application, the support body 50 is configured as an insulator, and the insulator is attached to one end of the end cover 40 close to the second end of the shell 10.

[0054] That is, the support body 50 can be an insulator made of insulating material (for example, plastic), and the radial dimension of the insulator is greater than the radial dimensions of the annular connecting portion 11a and the insulating piece 30, so that the insulator can be attached to one end of the end cover 40 close to the second end of the shell 10, effectively insulating the end cover 40 and the shell 10, preventing electrical contact between the end cover 40 and the shell 10, thereby effectively avoiding the problem of short circuit of the cylindrical battery 100, and significantly improving the safety of the cylindrical battery 100. In addition, the support body 50 also serves to support the end portion of the end cover 40, further ensuring the stability of the overall structure of the cylindrical battery 100.

[0055] As Figure 3As shown, in some specific embodiments of the present application, the radial dimension of the support body 50 is the same as that of the shell 10 and the end cover 40, so that the radial dimension of the cylindrical battery 100 can be avoided to be too large, and the demand of supporting the first wall body and the end cover 40 can be met, and the end cover 40 and the shell 10 can be effectively insulated, and the electrical contact between the end cover 40 and the shell 10 is prevented, so that the problem of short circuit of the cylindrical battery 100 is effectively avoided.

[0056] In summary, according to the cylindrical battery 100 of the present application, the annular connecting part 11a of the end cover 40 and the shell 10 can be directly connected together by the insulating part 30, so that the shell 10 does not need to be provided with a closing structure for fixing the end cover 40, thereby significantly reducing the axial dimension of the cylindrical battery 100, and the energy density of the cylindrical battery 100 is improved, and the structure is simple and convenient for production and manufacturing.

[0057] The present application also provides an electronic device, for example, but not limited to, a mobile phone, a car, an electric vehicle, etc., which comprises the cylindrical battery 100 described in any of the above embodiments. Since the cylindrical battery 100 according to the present application has the above technical effects, the electronic device according to the present application also has corresponding technical effects, and this embodiment will not be described in detail.

[0058] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A cylindrical battery, characterized by comprising: The application relates to a cylindrical battery, comprising: a shell (10) provided with an annular connecting part (11a) extending in the radial direction of the shell (10) at the opening of the first end of the shell (10); a winding core (20) arranged in the shell (10), the winding core (20) being provided with a first tab (21) and a second tab (22), the first tab (21) being electrically connected to the shell (10); an insulating part (30) and an end cover (40), the first side of the insulating part (30) being arranged on the inner side of the end cover (40), the second side of the insulating part (30) being arranged on the side of the annular connecting part (11a) away from the second end of the shell (10), and the insulating part (30) connecting the annular connecting part (11a) and the end cover (40).

2. The cylindrical battery according to claim 1, characterized by, The first side of the insulating part (30) is provided with a first plastic layer, and the first plastic layer is fused to the end cover (40); and / or, the second side of the insulating part (30) is provided with a second plastic layer, and the second plastic layer is fused to the annular connecting part (11a).

3. The cylindrical battery according to claim 1, characterized by, The insulating part (30) is configured as a plastic part, and the plastic part is fused to the annular connecting part (11a) and the end cover (40).

4. The cylindrical battery according to claim 1, characterized by, The side of the annular connecting part (11a) away from the second end of the shell (10) is provided with a first annular protrusion, and the first annular protrusion cooperates with the end cover (40) to compress the insulating part (30); and / or, the inner side of the end cover (40) is provided with a second annular protrusion (41), and the second annular protrusion (41) cooperates with the annular connecting part (11a) to compress the insulating part (30).

5. The cylindrical battery according to claim 4, characterized by The first annular protrusion and / or the second annular protrusion (41) are configured as compression protrusions.

6. The cylindrical battery according to claim 1, wherein The shell (10) is provided with a necked part (11) having oppositely arranged first and second wall bodies (11b) in the axial direction of the shell (10), wherein the first wall body is formed as the annular connecting part (11a), and the second wall body (11b) cooperates with the second end of the shell (10) to define the position of the winding core (20) in the axial direction of the shell (10).

7. The cylindrical battery according to claim 6, characterized by Further comprising: a support body (50) filled between the first wall body and the second wall body (11b) to support the first wall body.

8. The cylindrical battery according to claim 7, characterized by The support body (50) is configured as an insulator, and the insulator is in close contact with one end of the end cover (40) close to the second end of the shell (10).

9. The cylindrical battery according to claim 7, characterized by, The support body (50) has the same radial dimension as the shell (10) and the end cover (40).

10. An electronic device, comprising: The application further relates to a cylindrical battery comprising any one of the shell according to claims 1 to 9.

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