Cylindrical battery and electric device

Abstract

The utility model discloses a cylindrical battery and electric device relates to the field of battery. The cylindrical battery includes shell, electric core, first busbar, insulating gasket and cap, and the shell has opposite open end and closed end, and the electric core, first busbar and insulating gasket all are arranged in the inside of shell, and are arranged in order from closed end to open end, and the cap covers open end, the electric core opposite both ends have the first lug and second lug of polarity opposite, and the first busbar includes arc main part and extension handle, and the arc main part is connected with the first lug, and one end of extension handle is connected with arc main part, and the other end is connected with cap through insulating gasket, and the second lug is connected with closed end. The utility model provides the structure of cylindrical battery is more compact, and the safety is higher, and the manufacturing process is simpler.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more specifically, to a cylindrical battery and an electrical device. Background Technology

[0002] Currently, cylindrical batteries on the market typically have a busbar between the cap and one end of the cell, which establishes an electrical connection between the cap and the end of the cell.

[0003] To accommodate cylindrical battery cells, these busbars are typically circular, with a connecting section extending from the outer diameter of the circle to connect with a cap. The busbar has a large bending radius and high bending pressure, which makes battery manufacturing more difficult and increases the risk of the busbar breaking, thus affecting battery safety. Utility Model Content

[0004] The purpose of this invention is to provide a cylindrical battery that is easier to manufacture and has higher reliability.

[0005] Another objective of this invention is to provide an electrical device that offers enhanced safety during use.

[0006] The embodiments of this utility model provide a technical solution:

[0007] A cylindrical battery includes a casing, a battery cell, a first busbar, an insulating gasket, and a cap. The casing has an open end and a closed end. The battery cell, the first busbar, and the insulating gasket are all disposed inside the casing and arranged sequentially from the closed end to the open end. The cap covers the open end.

[0008] The battery cell has a first tab and a second tab with opposite polarities at its two opposite ends. The first busbar includes an arc-shaped body and an extension handle. The arc-shaped body is connected to the first tab. One end of the extension handle is connected to the arc-shaped body, and the other end passes through the insulating gasket and is connected to the cap. The second tab is connected to the closed end.

[0009] In an optional embodiment, the central angle of the bow-shaped body is greater than 180°, and one end of the extension handle is connected to the chord length of the bow-shaped body.

[0010] In an alternative embodiment, the centerline of the extension handle is perpendicular to the chord segment and passes through the midpoint of the chord segment.

[0011] In an optional embodiment, the cross-sectional diameter of the outer shell is 26 mm, the diameter of the bow-shaped body is 23.5 mm, and the distance between the chord length of the bow-shaped body and the center of the bow-shaped body is 7.5 mm.

[0012] In an optional embodiment, the width of the extension handle is greater than or equal to 10 mm and less than or equal to 15 mm; and / or,

[0013] The length of the extension handle is greater than or equal to 18.6 mm and less than or equal to 21.5 mm.

[0014] In an optional embodiment, the cross-sectional diameter of the outer shell is 32 mm, the diameter of the bow-shaped body is 30 mm, and the distance between the chord length of the bow-shaped body and the center of the bow-shaped body is 8.5 mm.

[0015] In an optional embodiment, the width of the extension handle is greater than or equal to 10 mm and less than or equal to 16 mm; and / or,

[0016] The length of the extension handle is greater than or equal to 22 mm and less than or equal to 24.6 mm.

[0017] In an optional embodiment, a second busbar is further included, which is disposed inside the housing and connected to the end wall of the closed end, and the second electrode tab is connected to the second busbar.

[0018] In an optional embodiment, an insulating ring is also included, which is disposed on the side surface of the cap away from the closed end.

[0019] An electrical device includes the aforementioned cylindrical battery. The cylindrical battery includes a casing, a battery cell, a first busbar, an insulating gasket, and a cap. The casing has an open end and a closed end. The battery cell, the first busbar, and the insulating gasket are all disposed inside the casing and arranged sequentially from the closed end to the open end. The cap covers the open end. The battery cell has a first tab and a second tab with opposite polarities at opposite ends. The first busbar includes an arc-shaped body and an extension handle. The arc-shaped body is connected to the first tab. One end of the extension handle is connected to the arc-shaped body, and the other end passes through the insulating gasket and is connected to the cap. The second tab is connected to the closed end.

[0020] Compared to existing technologies, the cylindrical battery provided by this invention features a first busbar comprising an arc-shaped body and an extension handle. The arc-shaped body is connected to the first tab of the battery cell. One end of the extension handle is connected to the arc-shaped body, and the other end passes through an insulating gasket and connects to the cap, thus achieving electrical connection between the first tab and the cap. The extension handle, passing through the insulating gasket and connecting to the cap, positions the extension handle, preventing it from taking up too much space due to repeated bending and preventing short circuits caused by contact between the extension handle and the outer casing. The arc-shaped body and the extension handle design mean that when connecting to the cap, only the extension handle needs to be bent once, simplifying the manufacturing process and reducing bending pressure. This results in better reliability compared to existing busbars, leading to improved safety and stability of the cylindrical battery. Therefore, the beneficial effects of the cylindrical battery provided by this invention include: a more compact structure, higher safety, and a simpler manufacturing process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 An exploded view of a cylindrical battery provided for an embodiment of this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the first busbar.

[0024] Icons: 100-Cylindrical battery; 110-Casing; 111-Open end; 112-Closed end; 120-Cell; 130-First busbar; 131-Arch-shaped body; 132-Extension handle; 140-Insulating gasket; 150-Cap; 160-Second busbar; 170-Insulating ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] Example

[0033] Please see Figure 1 , Figure 1 The diagram shown is an exploded view of the cylindrical battery 100 provided in this embodiment.

[0034] The cylindrical battery 100 provided in this embodiment includes a casing 110, a battery cell 120, a first busbar 130, an insulating pad 140, a cap 150, and a second busbar 160.

[0035] The housing 110 has an open end 111 and a closed end 112. The second busbar 160, the battery cell 120, the first busbar 130 and the insulating gasket 140 are all disposed inside the housing 110 and are arranged in sequence from the closed end 112 to the open end 111. The cap 150 covers the open end 111.

[0036] The battery cell 120 has a first tab and a second tab with opposite polarities at its two opposite ends. The first tab is located at the end of the battery cell 120 closer to the open end 111 and is electrically connected to the cap 150 through the first busbar 130. The second tab is located at the end of the battery cell 120 away from the open end 111 and is connected to the end wall of the closed end 112 through the second busbar 160.

[0037] It is understood that the polarity of the first and second tabs is not specifically limited. In this embodiment, the first tab is the positive tab, and a positive terminal post is provided on the cap 150 as the positive terminal of the cylindrical battery 100; the second tab is the negative tab, and the outer casing 110 serves as the negative terminal of the cylindrical battery 100. In another embodiment, the first tab can also be the negative tab, in which case the second tab is the positive tab.

[0038] Please refer to the following: Figure 2 , Figure 2 The diagram shown is a structural schematic of the first busbar 130.

[0039] In this embodiment, the first busbar 130 includes an arc-shaped body 131 and an extension handle 132. The arc-shaped body 131 is connected to the first electrode ear. One end of the extension handle 132 is connected to the arc-shaped body 131, and the other end passes through the insulating gasket 140 and is connected to the cap 150. The second electrode ear is connected to the closed end 112.

[0040] Preferably, in this embodiment, the bow-shaped body 131 and the extension handle 132 are integrally formed. The bow-shaped body 131 is a bow-shaped plate. The first electrode tab is a flattened electrode tab, which is laser-welded to one side of the plate-shaped bow-shaped body 131. The end of the extension handle 132 away from the bow-shaped body 131 passes through the insulating gasket 140 and is laser-welded to the cap 150. The second electrode tab is also a flattened electrode tab, which is laser-welded to one side of the second busbar 160. The other side of the second busbar 160 is welded to the end wall of the closed end 112. Resistance welding or through welding can be used for welding.

[0041] The extension handle 132 passes through the insulating pad 140 and connects to the cap 150. The insulating pad 140 positions the extension handle 132, preventing it from being bent repeatedly and taking up too much space, and preventing the extension handle 132 from contacting the outer casing 110 and causing a short circuit. The arc-shaped body 131 exposes part of the space near the end face of the cell 120, allowing the cell 120 to dissipate heat better, resulting in better overall heat dissipation of the cylindrical battery 100.

[0042] In this embodiment, the bow-shaped body 131 is a superior bow shape, that is, the central angle of the bow-shaped body 131 is greater than 180°, the extension handle 132 is generally rectangular, one end of the extension handle 132 in the length direction is connected to the chord length of the bow-shaped body 131, and the other end passes through the insulating gasket 140 and is laser welded to the cap 150.

[0043] In practical applications, for ease of assembly, the end of the extension handle 132 away from the bow-shaped body can be chamfered.

[0044] In this embodiment, the centerline of the extension handle 132 is perpendicular to the chord length segment and passes through the midpoint of the chord length segment. It can be understood that in this embodiment, the centerline of the extension handle 132 extends along the length of the extension handle 132 and passes through the midpoint of the wide side of the extension handle 132.

[0045] In other words, the first busbar 130 in this embodiment is an axisymmetric structure, and its axis of symmetry coincides with the center line of the extension handle 132.

[0046] like Figure 2 As shown, in this embodiment, the diameter of the bow-shaped body 131 is defined as R, the distance between the chord length segment and the center of the bow-shaped body 131 is defined as D, the length of the extension handle 132 is defined as L, and the width of the extension handle 132 is defined as W.

[0047] The cylindrical battery 100 provided in this embodiment is a 26mm battery, that is, the cross-sectional diameter of the outer casing 110 is 26mm. Preferably, the diameter R of the arc-shaped body 131 is 23.5mm, the distance D between the chord length of the arc-shaped body 131 and the center of the arc-shaped body 131 is 7.5mm, and the thickness of the first busbar 130 is 0.3mm.

[0048] The width W of the extension handle 132 is greater than or equal to 10 mm and less than or equal to 15 mm. For a 26 mm battery, the width W of the extension handle 132 is within this range, which ensures that the width of the extension handle 132 meets the cross-sectional area required for overcurrent, avoids excessive width that would prevent proper assembly, and also prevents bending during assembly that could lead to contact with the outer casing 110 and cause a short circuit, thus eliminating the need for insulating adhesive.

[0049] The length L of the extension handle 132 is greater than or equal to 18.6 mm and less than or equal to 21.5 mm. The length L of the extension handle 132 falls within this range, meeting the requirements for assembly and sealing of the cap 150. The extension handle 132 only needs a C-shaped bend to connect smoothly with the cap 150, avoiding the need for Z-shaped folding due to excessive length, which would occupy too much space. It also avoids short circuits caused by bending to the point of contact with the outer casing 110, eliminating the need for insulating adhesive.

[0050] In another embodiment, the cylindrical battery 100 is a 32mm battery, meaning the cross-sectional diameter of the outer casing 110 is 32mm. In this case, the diameter R of the arc-shaped body 131 is 30mm, the distance D between the chord length of the arc-shaped body 131 and the center of the arc-shaped body 131 is 8.5mm, and the thickness of the first busbar 130 is 0.3mm.

[0051] The width W of the extension handle 132 is greater than or equal to 10 mm and less than or equal to 16 mm. For a 32 mm battery, the width W of the extension handle 132 is within this range, which ensures that the width of the extension handle 132 meets the cross-sectional area required for overcurrent, avoids excessive width that would prevent proper assembly, and also prevents bending during assembly that could lead to contact with the outer casing 110 and cause a short circuit, thus eliminating the need for insulating adhesive.

[0052] The length L of the extension handle 132 is greater than or equal to 22mm and less than or equal to 24.6mm. The length L of the extension handle 132 falls within this range, meeting the requirements for assembly and sealing of the cap 150. The extension handle 132 only needs a C-shaped bend to connect smoothly with the cap 150, avoiding the need for Z-shaped folding due to excessive length, which would occupy too much space. It also avoids short circuits caused by bending to the point of contact with the outer casing 110, eliminating the need for insulating adhesive.

[0053] In the actual assembly process, the first tab of the battery cell 120 can be laser-welded to the arc-shaped body 131 of the first busbar 130, and the second tab can be laser-welded to the second busbar 160. The extension shank 132 of the first busbar 130 can then pass through the corresponding opening on the insulating gasket 140 and be laser-welded to the cap 150 to form an integral structure. After that, the integral structure is inserted into the housing 110 through the open end 111, and the cap 150 is mechanically sealed to the open end 111. The second busbar 160 is then welded to the end wall of the closed end 112, which can be done by resistance welding or through welding.

[0054] To further improve insulation performance and prevent accidental short circuit caused by electrical connection between the cap 150 and the outer casing 110, the cylindrical battery 100 provided in this embodiment also includes an insulating ring 170. The insulating ring 170 is disposed on the side surface of the cap 150 away from the closed end 112 and circumferentially covers the surface of the cap 150.

[0055] In summary, the cylindrical battery 100 provided in this embodiment has a more compact structure, higher safety, and better heat dissipation. Furthermore, by setting the dimensions of the extension handle 132, assembly requirements are met, and a C-shaped bend is achieved upon completion of assembly, avoiding excessive space occupation due to Z-shaped folding. It also prevents short circuits caused by contact between the extension handle 132 and the outer casing 110, eliminating the need for insulating adhesive coating and simplifying the manufacturing process.

[0056] In addition, this embodiment also provides an electrical device, including the aforementioned cylindrical battery 100. Benefiting from the advantages of the cylindrical battery 100, the electrical device provided in this embodiment has the feature of higher safety in use.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cylindrical battery, characterized in that, The device includes a housing (110), a battery cell (120), a first busbar (130), an insulating pad (140), and a cap (150). The housing (110) has an open end (111) and a closed end (112). The battery cell (120), the first busbar (130), and the insulating pad (140) are all disposed inside the housing (110) and are arranged sequentially from the closed end (112) to the open end (111). The cap (150) covers the open end (111). The battery cell (120) has a first tab and a second tab with opposite polarities at its two opposite ends. The first busbar (130) includes an arc-shaped body (131) and an extension shank (132). The arc-shaped body (131) is connected to the first tab. One end of the extension shank (132) is connected to the arc-shaped body (131), and the other end passes through the insulating pad (140) and is connected to the cap (150). The second tab is connected to the closed end (112).

2. The cylindrical battery according to claim 1, characterized in that, The central angle of the bow-shaped body (131) is greater than 180°, and one end of the extension handle (132) is connected to the chord length of the bow-shaped body (131).

3. The cylindrical battery according to claim 2, characterized in that, The centerline of the extension handle (132) is perpendicular to the chord segment and passes through the midpoint of the chord segment.

4. The cylindrical battery according to claim 2, characterized in that, The outer shell (110) has a cross-sectional diameter of 26 mm, the bow-shaped body (131) has a diameter of 23.5 mm, and the distance between the chord length of the bow-shaped body (131) and the center of the bow-shaped body (131) is 7.5 mm.

5. The cylindrical battery according to claim 4, characterized in that, The width of the extension handle (132) is greater than or equal to 10 mm and less than or equal to 15 mm; and / or, The length of the extension handle (132) is greater than or equal to 18.6 mm and less than or equal to 21.5 mm.

6. The cylindrical battery according to claim 2, characterized in that, The outer shell (110) has a cross-sectional diameter of 32 mm, the bow-shaped body (131) has a diameter of 30 mm, and the distance between the chord length of the bow-shaped body (131) and the center of the bow-shaped body (131) is 8.5 mm.

7. The cylindrical battery according to claim 6, characterized in that, The width of the extension handle (132) is greater than or equal to 10 mm and less than or equal to 16 mm; and / or, The length of the extension handle (132) is greater than or equal to 22 mm and less than or equal to 24.6 mm.

8. The cylindrical battery according to claim 1, characterized in that, It also includes a second busbar (160), which is disposed inside the housing (110) and connected to the end wall of the closed end (112), and the second electrode is connected to the second busbar (160).

9. The cylindrical battery according to claim 1, characterized in that, It also includes an insulating ring (170) disposed on the side surface of the cap (150) away from the closed end (112).

10. An electrical device, characterized in that, Including the cylindrical battery (100) as described in any one of claims 1-9.

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