Terminal structure and cylindrical battery

Abstract

The utility model provides a terminal structure and a cylindrical battery. The terminal structure comprises an insulating part, a current collecting disc and a pole. The surface of the insulating part is provided with a positioning column and is also provided with a first through hole. The current collecting disc and the insulating part are arranged in a stacked mode, the current collecting disc is provided with a second through hole and a positioning hole, and the positioning column penetrates through the positioning hole; and the pole penetrates through the first through hole and the second through hole. According to the embodiment of the invention, the positioning columns and the positioning holes are designed, and the positioning columns are limited by the positioning holes, so that the relative position between the insulating part and the current collecting disc is fixed, the positioning stability of the current collecting disc is improved, and the shaking and deviation of the current collecting disc are reduced; through cooperation with the pole and the reinforcing rib for limiting, the limiting mode is increased, so that the limiting effect is further improved; and compared with a double-pole scheme, the material cost can be saved, and the production efficiency can be improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries. Specifically, this application relates to a terminal structure and a cylindrical battery. Background Art

[0002] Currently, the common design is to use a pole post to pass through a current collector plate, a lower plastic part, a cover plate, etc. for riveting or laser welding for connection. However, due to the single-pole post connection, the limit at the connection of the current collector plate is unstable, it is easy to shake, and the position of the current collector plate shifts, which is likely to cause the subsequent battery cells to be unable to be assembled smoothly, or lead to inaccurate welding positioning between the current collector plate and the bare battery cell, resulting in the scrapping of the bare battery cell during welding and other problems.

[0003] Therefore, the current common design adds double-pole post positioning, with both side pole posts fixed, reducing the risk of the current collector plate shaking. However, such fixation increases the material cost and also reduces the production efficiency of the top cover part. The current collector plate has a front and a back, and it is easy to have the situation of incorrect front-back installation.

[0004] In summary, the existing terminal structure has technical problems of relatively high material cost, relatively low production efficiency, and easy installation errors. Utility Model Content

[0005] In view of the disadvantages of the existing method, this application proposes a terminal structure and a cylindrical battery to solve the technical problems of relatively high material cost, relatively low production efficiency, and easy installation errors existing in the prior art.

[0006] In a first aspect, an embodiment of this application provides a terminal structure, including an insulating part, a current collector plate, and a pole post:

[0007] The insulating part, on the surface of which there are positioning posts and which also has a first through hole;

[0008] The current collector plate, which is stacked with the insulating part, and the current collector plate has a second through hole and a positioning hole, and the positioning post passes through the positioning hole;

[0009] The pole post, which passes through the first through hole and the second through hole.

[0010] In some embodiments of this application, the contour of the current collector plate is an axisymmetric figure, and the positioning hole is away from the axis of symmetry of the current collector plate.

[0011] In some embodiments of this application, there are also multiple reinforcing ribs on the surface of the insulating part, and the multiple reinforcing ribs form a limiting groove. The positioning post and the first through hole are both located in the limiting groove, and at least part of the current collector plate is embedded in the limiting groove.

[0012] In some embodiments of this application, the current collector plate includes an end part, a connecting part, and a plate body connected in sequence, and the end part is embedded in the limiting groove.

[0013] In some embodiments of the present application, the current collecting plate further includes a first bending portion and a second bending portion. The first bending portion is located between the end portion and the connecting portion, and the second bending portion is located between the connecting portion and the plate body.

[0014] In some embodiments of the present application, at least multiple reinforcing ribs include a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The first reinforcing rib and the second reinforcing rib are oppositely arranged and parallel to each other. The third reinforcing rib is located between the first reinforcing rib and the second reinforcing rib and is perpendicular to the first reinforcing rib and the second reinforcing rib.

[0015] In some embodiments of the present application, it further includes a flanging retaining wall, and the flanging retaining wall surrounds the edge of the positioning hole and protrudes from the current collecting plate.

[0016] In some embodiments of the present application, the first through hole covers the center of the insulating part, and the second through hole covers the center of the end portion of the current collecting plate.

[0017] In some embodiments of the present application, the cross-sectional area of the positioning post is smaller than the cross-sectional area of the pole post.

[0018] In a second aspect, an embodiment of the present application further provides a cylindrical battery, including a battery case, a battery cell, and a terminal structure as described in any one of the embodiments in the first aspect. The battery cell is connected to the current collecting plate of the terminal structure, and the battery case is sleeved outside the battery cell and the terminal structure.

[0019] The beneficial technical effects brought by the technical solutions provided by the embodiments of the present application include: by designing the positioning post and the positioning hole in the embodiments of the present application, the positioning post passes through the positioning hole, and the relative position between the insulating part and the current collecting plate is fixed by the limitation of the positioning hole on the positioning post, increasing the positioning stability of the current collecting plate and reducing the shaking and offset of the current collecting plate; and by cooperating with the pole post and the reinforcing ribs for limitation, the limiting method is increased to further improve the limiting effect, which is beneficial to the welding positioning of the current collecting plate and the bare battery cell and the smooth assembly of the battery cell in the subsequent manufacturing process; compared with the bipolar post solution, it can not only save material costs but also improve production efficiency.

[0020] The additional aspects and advantages of the present application will be partially given in the following description, and these will become obvious from the following description or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0022] Figure 1This is a schematic structural diagram of a terminal structure in an embodiment of the present application;

[0023] Figure 2 This is a schematic cross-sectional view of a terminal structure in an embodiment of the present application.

[0024] Reference numerals:

[0025] 1 - Insulator, 2 - Current collector plate, 3 - Terminal post;

[0026] 11 - Positioning post, 12 - First through hole, 13 - Reinforcing rib;

[0027] 21 - End portion, 22 - Connection portion, 23 - Disk body. Detailed implementation manners

[0028] The embodiments of the present application will be described below with reference to the accompanying drawings in the present application. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions of the embodiments of the present application.

[0029] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the above" and "the" used herein may also include the plural forms. It should be further understood that the term "including" used in the specification of the present application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the art of the present technology, etc.

[0030] To make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings. It should be noted that the following embodiments can be referenced, learned from or combined with each other. For the same terms, similar features and similar implementation steps in different embodiments, they will not be described repeatedly.

[0031] The present application aims at the disadvantages of the existing methods and proposes a terminal structure and a cylindrical battery to solve the technical problems of high material cost, low production efficiency and easy installation errors existing in the prior art.

[0032] In a first aspect, an embodiment of the present application provides a terminal structure, as Figure 1 and Figure 2 shown, Figure 1 This is a schematic structural diagram of a terminal structure in an embodiment of the present application; Figure 2 This is a schematic cross-sectional view of a terminal structure in an embodiment of the present application. It can be understood that Figure 2 is Figure 1Cross-sectional view along the A-A direction. In the figure, the positioning post 11 coincides with the positioning hole, and the first through-hole 12 coincides with the second through-hole, and no repeated labeling is provided.

[0033] A terminal structure, comprising an insulating member 1, a current collector plate 2, and a pole post 3:

[0034] Insulating member 1, on the surface of which there is a positioning post 11 and which also has a first through-hole 12;

[0035] Current collector plate 2, stacked with the insulating member 1, the current collector plate 2 having a second through-hole and a positioning hole, and the positioning post 11 passing through the positioning hole;

[0036] Pole post 3, passing through the first through-hole 12 and the second through-hole.

[0037] In the embodiment of the present application, by designing the positioning post 11 and the positioning hole, the positioning post 11 passes through the positioning hole, and the relative position between the insulating member 1 and the current collector plate 2 is fixed by the limitation of the positioning hole on the positioning post 11, increasing the positioning stability of the current collector plate 2, and reducing the shaking and offset of the current collector plate 2; and by cooperating with the pole post 3 and the reinforcing ribs 13 for limitation, the limiting method is increased, thereby further improving the limiting effect, which is beneficial to the welding positioning of the current collector plate 2 and the bare battery cell and the smooth assembly of the battery cell in the subsequent manufacturing process; compared with the scheme of the bipolar post 3, it can not only save material costs but also improve production efficiency.

[0038] In some embodiments of the present application, the contour of the current collector plate 2 is an axisymmetric figure, and the positioning hole is separated from the axis of symmetry of the current collector plate 2.

[0039] In this embodiment, the current collector plate 2 has a front and a back. The current collector plate 2 takes the middle line as the axis of symmetry, and the positioning hole is designed at a position outside the middle line of the current collector plate 2, which can increase the anti-mistake function and avoid mistakes during the assembly of the cover plate.

[0040] In another embodiment, multiple positioning holes are designed on the current collector plate 2. The multiple positioning holes are not all located on the axis of symmetry and are not symmetric in pairs about the center of the end 21, which can also be used as an anti-mistake design and also has the effect of further improving the limiting effect.

[0041] In some embodiments of the present application, there are also multiple reinforcing ribs 13 provided on the surface of the insulating member 1. The multiple reinforcing ribs 13 form a limiting groove. The positioning post 11 and the first through-hole 12 are both located in the limiting groove, and at least a part of the current collector plate 2 is embedded in the limiting groove.

[0042] In this embodiment, the reinforcing ribs 13 cooperate with one or more positioning holes for limitation.

[0043] In another embodiment, if the surface of the insulating part 1 is not designed with reinforcing ribs 13, a plurality of positioning posts 11 and a plurality of positioning holes must be designed to ensure the limiting effect.

[0044] In some embodiments of the present application, the current collector plate 2 includes an end part 21, a connecting part 22, and a plate body 23 connected in sequence, and the end part 21 is embedded in the limiting groove.

[0045] In this embodiment, the entire end part 21 is embedded in the positioning groove, and a part of the connecting part 22 is embedded in the positioning groove. The positioning hole can be located in the end part 21 or in a partial area of the positioning groove where the connecting part 22 is embedded.

[0046] The shape of the positioning hole can be circular or regular polygon, and the shape, diameter, and quantity of the positioning posts 11 of the insulating part 1 are all matched with the positioning hole. When each component is connected, the positioning hole fits perfectly with the positioning posts 11, strengthening the positioning effect. With the reinforcing ribs 13 at the top, even if a single pole column 3 combination connection is designed, accurate limiting can be achieved, and at the same time, cost is saved.

[0047] In some embodiments of the present application, the current collector plate 2 further includes a first bending part and a second bending part. The first bending part is located between the end part 21 and the connecting part 22, and the second bending part is located between the connecting part 22 and the plate body 23.

[0048] In some embodiments of the present application, the plurality of reinforcing ribs 13 at least include a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The first reinforcing rib and the second reinforcing rib are oppositely arranged and parallel to each other, and the third reinforcing rib is located between the first reinforcing rib and the second reinforcing rib and is perpendicular to the first reinforcing rib and the second reinforcing rib.

[0049] In some embodiments of the present application, it further includes a flanging retaining wall, and the flanging retaining wall surrounds the edge of the positioning hole and protrudes from the current collector plate 2.

[0050] In this embodiment, the positioning hole adopts an upward flanging design to form an upward flanging retaining wall at the edge of the positioning hole. In a general design, the positioning hole is directly matched with the positioning posts 11. During assembly, the sharp metal edge of the positioning hole is likely to scrape the positioning posts 11, introducing impurities into the internal part of the battery cell, and at the same time, it will also cause problems such as inaccurate positioning. Therefore, with this flanging structure design, during assembly, the cooperation degree between the positioning hole and the positioning posts 11 is high, the positioning is accurate, and the positioning posts 11 will not be scratched, thus avoiding the situation of introducing impurities or scratching the positioning posts 11.

[0051] In some embodiments of the present application, the height of the flanging retaining wall is not less than 0.5 mm and not more than 5 mm.

[0052] In some embodiments of the present application, the first through hole 12 covers the center of the insulating member 1, and the second through hole covers the center of the end portion 21 of the current collector plate 2.

[0053] In some embodiments of the present application, the cross-sectional area of the positioning post 11 is smaller than the cross-sectional area of the pole post 3.

[0054] In a second aspect, an embodiment of the present application further provides a cylindrical battery, including a battery case, an electric core, and a terminal structure as described in any one of the embodiments in the first aspect. The electric core is connected to the current collector plate 2 of the terminal structure, and the battery case is sleeved outside the electric core and the terminal structure.

[0055] Compared with the prior art, by applying the embodiments of the present application, at least the following beneficial effects can be achieved: In the embodiments of the present application, by designing the positioning post 11 and the positioning hole, the positioning post 11 passes through the positioning hole, and the relative position between the insulating member 1 and the current collector plate 2 is fixed by the limitation of the positioning hole on the positioning post 11, thereby increasing the positioning stability of the current collector plate 2 and reducing the shaking and offset of the current collector plate 2; furthermore, by cooperating with the pole post 3 and the reinforcing rib 13 for limitation, the limiting method is increased, thereby further improving the limiting effect, which is beneficial to the welding positioning of the current collector plate 2 and the bare electric core and the smooth assembly of the electric core in the subsequent manufacturing process; compared with the scheme of the bipolar pole post 3, both the material cost can be saved and the production efficiency can be improved.

[0056] By designing the positioning hole on the current collector plate 2 for positioning and cooperating with the top reinforcing rib 13 for limitation, even when using a single pole post 3 for connection, the position of the current collector plate 2 can still be well fixed, and at the same time, the material cost is saved; an anti-fooling design is added to prevent the current collector plate 2 from being installed incorrectly; the flanging design of the fine positioning hole avoids the situation that the metal edge of the positioning hole of the current collector plate 2 scratches the positioning post 11 of the plastic part, resulting in inaccurate positioning or introducing foreign matters.

[0057] In the description of the present application, the directions or position relationships indicated by the words "upper", "lower", "left", "right", "vertical", "horizontal", etc. are the exemplary directions based on the drawings, rather than indicating or implying that the device or component referred to must have a specific orientation. The terms "first" and "second" are only used for descriptive purposes, and the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. It should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components. In addition, the "connection" used here can include wireless connection.

[0058] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0059] Those skilled in the art of this technology can understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, changed, rearranged, decomposed, combined, or deleted.

[0060] The above are only some implementation manners of this application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical concept of the solution of this application, adopting other similar implementation means based on the technical idea of this application also belongs to the protection scope of the embodiments of this application.

Claims

1. A terminal structure, characterized in that: include: An insulating member, wherein a positioning column is disposed on a surface of the insulating member and the insulating member also has a first through hole; A current collecting plate, stacked with the insulating member, the current collecting plate having a second through hole and a positioning hole, the positioning post passing through the positioning hole; A pole passes through the first through hole and the second through hole.

2. The terminal structure according to claim 1, characterized in that: The contour of the current collecting disk is an axisymmetric figure, and the positioning hole is separated from the symmetry axis of the current collecting disk.

3. The terminal structure according to claim 1, characterized in that: The surface of the insulating member is further provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs form a limiting groove, the positioning column and the first through hole are both located in the limiting groove, and the current collecting plate is at least partially embedded in the limiting groove.

4. The terminal structure according to claim 3, characterized in that: The current collecting plate comprises an end portion, a connecting portion and a plate body which are connected in sequence, and the end portion is embedded in the limiting groove.

5. The terminal structure according to claim 4, characterized in that: The current collecting plate further includes a first bending portion and a second bending portion, wherein the first bending portion is located between the end portion and the connecting portion, and the second bending portion is located between the connecting portion and the plate body.

6. The terminal structure according to claim 3, characterized in that: The plurality of reinforcing ribs include at least a first reinforcing rib, a second reinforcing rib and a third reinforcing rib. The first reinforcing rib and the second reinforcing rib are arranged opposite to each other and are parallel to each other. The third reinforcing rib is located between the first reinforcing rib and the second reinforcing rib and is perpendicular to the first reinforcing rib and the second reinforcing rib.

7. The terminal structure according to claim 1, characterized in that: It also includes a flanged retaining wall, which surrounds the edge of the positioning hole and protrudes from the collecting plate.

8. The terminal structure according to claim 1, characterized in that: The first through hole covers the center of the insulating member, and the second through hole covers the center of the end of the collecting plate.

9. The terminal structure according to claim 1, characterized in that: The cross-sectional area of ​​the positioning column is smaller than the cross-sectional area of ​​the pole.

10. A cylindrical battery, characterized in that: It comprises a battery shell, a battery cell and a terminal structure as claimed in any one of claims 1 to 9, wherein the battery cell is connected to a current collecting plate of the terminal structure, and the battery shell is sleeved on the outside of the battery cell and the terminal structure.

Images