Cylindrical battery cover plate and cylindrical battery

By designing the uneven first rod part of the cylindrical battery cover to fit the pole hole wall and increase the contact area, the problems of high impedance and insufficient torque resistance of the rivet and pole are solved, and the battery performance and life are improved.

CN222355254UActive Publication Date: 2025-01-14SUNGROW POWER SUPPLY CO LTD
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Patent Information

Application Number
CN202420178574.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-24
Publication Date
2025-01-14
Estimated Expiration
2034-01-24

AI Technical Summary

Technical Problem

The contact interface impedance between the rivets and the pole column in the existing cylindrical battery cover plate is relatively large, and after long-term use, the pole column may be twisted by external force, resulting in insufficient riveting tightness and low reliability.

Method used

A cylindrical battery cover is designed, and the outer peripheral surface of the first rod part that is fitted with the pole column in the connecting member is uneven, and is fitted with the mounting hole wall of the pole column, increasing the contact area, reducing impedance, and passing through the sawtooth shaped or wavy surfaces improve torsion resistance and enhance assembly reliability.

Benefits of technology

It effectively reduces the contact interface impedance between the connector and the pole column, improves the performance and life of the battery, enhances the torsion resistance and assembly reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a cylindrical battery cover plate which comprises a cover plate, a pole and a connecting piece, a first mounting hole is formed in the cover plate; the pole is provided with a second mounting hole; the connecting piece comprises an end cap and a connecting rod, and one end of the connecting rod is fixedly connected with the end cap; the connecting rod penetrates through the first mounting hole and the second mounting hole; the cover plate is positioned between the pole and the end cap; the cover plate is insulated from the connecting piece and the pole respectively; wherein the part, matched with the pole in an inserting manner, of the connecting rod is a first rod part, the peripheral surface of the first rod part is uneven, and the peripheral surface of the first rod part is attached to the hole wall of the second mounting hole. According to the cylindrical battery cover plate, the peripheral surface of the first rod part, which is in plug-in fit with the pole, in the connecting piece is uneven, and the peripheral surface of the first rod part is attached to the hole wall of the second mounting hole of the pole, so that the contact area of the first rod part and the pole is increased, and the impedance of the contact interface of the first rod part and the pole is reduced. The utility model also discloses a cylindrical battery applying the cylindrical battery cover plate.
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Description

Technical Field

[0001] The utility model relates to the technical field of mechanical industry, and more specifically, to a cylindrical battery cover plate and a cylindrical battery. Background Art

[0002] Cylindrical batteries are batteries with high capacity, long cycle life and wide operating temperature range. Figure 1 The cover plate structure of the cylindrical battery is a riveted structure, including a riveted cover plate 04 and a pole 01. Insulating pads 03 are provided on both sides of the cover plate 04, and an insulating sealing ring 05 is provided in the gap between the cover plate 04 and the rod of the rivet 02.

[0003] However, in the above cover plate structure, the impedance of the contact interface between the rivet 02 and the pole 01 is relatively large.

[0004] In addition, after long-term use, the pole 01 may be twisted due to external force, and the rivet 02 and the pole 01 are fastened only by riveting, which has low reliability.

[0005] Therefore, how to reduce the interface impedance between the rivets and the poles in the cover plate structure is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In view of this, the utility model provides a cylindrical battery cover, in which the outer circumference of the first rod portion in the connector that is inserted and matched with the pole is uneven, and the outer circumference of the first rod portion fits the hole wall of the second mounting hole of the pole, thereby increasing the contact area between the first rod portion and the pole, reducing the impedance of the contact interface between the two, and helping to improve the performance and life of the cylindrical battery. The utility model also provides a cylindrical battery using the above cylindrical battery cover, which has better performance and longer service life.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A cylindrical battery cover, comprising:

[0009] A cover plate, wherein the cover plate is provided with a first mounting hole;

[0010] A pole, wherein the pole is provided with a second mounting hole;

[0011] A connecting piece, the connecting piece comprises an end cap and a connecting rod, one end of the connecting rod is fixedly connected to the end cap; the connecting rod is passed through the first mounting hole and the second mounting hole, the cover plate is located between the pole and the end cap; the cover plate is insulated from the connecting piece and the pole respectively;

[0012] The part of the connecting rod that is plugged into the pole is a first rod portion, the outer circumference of the first rod portion is uneven, and the outer circumference of the first rod portion fits with the hole wall of the second mounting hole.

[0013] Optionally, in the above cylindrical battery cover plate, the outer peripheral surface of the first rod portion in the connecting rod is a serrated surface or a wavy surface.

[0014] Optionally, in the above-mentioned cylindrical battery cover, the first rod portion is interference fit with the pole; or an anti-slip convex edge is processed at one end of the first rod portion away from the cover, and the cover and the pole are located between the end cap and the anti-slip convex edge.

[0015] Optionally, in the above-mentioned cylindrical battery cover plate, the part of the connecting rod that is plugged into the cover plate is a second rod portion, and the cross-sectional shape of the second rod portion is the same as the shape of the first mounting hole; the second rod portion and the first rod portion are fixedly connected, and the end of the second rod portion that is away from the first rod portion is fixedly connected to the end cap.

[0016] Optionally, in the above cylindrical battery cover, the cross-sectional shape of the second rod portion is circular.

[0017] Optionally, in the above cylindrical battery cover, no part of the outer circumferential surface of the first rod portion protrudes beyond the outer circumferential surface of the second rod portion in the radial direction.

[0018] Optionally, in the above-mentioned cylindrical battery cover plate, insulating plates mounted on the connecting rod are provided on both sides of the cover plate, wherein the first insulating plate is clamped between the end cap and the cover plate, and the second insulating plate is clamped between the cover plate and the pole; an insulating sealing ring is provided between the outer peripheral surface of the connecting rod and the hole wall of the first mounting hole.

[0019] Optionally, in the above cylindrical battery cover plate, the insulating sealing ring includes a cylindrical main body and a skirt fixed to the outside of one end of the main body; the skirt is sandwiched between the first insulating plate and the cover plate.

[0020] Optionally, in the above cylindrical battery cover, a countersunk hole is provided on a surface of the second insulating plate facing the pole, and the pole is located in the countersunk hole.

[0021] A cylindrical battery comprises a cylindrical battery cover plate, wherein the cylindrical battery cover plate is the cylindrical battery cover plate described in any one of the above technical solutions.

[0022] The utility model provides a cylindrical battery cover plate, comprising a cover plate, a pole and a connecting piece; the cover plate is provided with a first mounting hole; the pole is provided with a second mounting hole; the connecting piece comprises an end cap and a connecting rod, one end of the connecting rod is fixedly connected to the end cap; the connecting rod is passed through the first mounting hole and the second mounting hole, and the cover plate is located between the pole and the end cap; the cover plate is insulated from the connecting piece and the pole respectively; wherein the part of the connecting rod that is plug-in matched with the pole is a first rod portion, the outer circumference of the first rod portion is uneven, and the outer circumference of the first rod portion is in contact with the hole wall of the second mounting hole.

[0023] In the above-mentioned cylindrical battery cover plate, the outer circumferential surface of the first rod portion in the connecting piece that is inserted into and matched with the pole is uneven, and the outer circumferential surface of the first rod portion is in contact with the hole wall of the second mounting hole of the pole. Compared with the solution of riveting the cover plate and the pole by rivets in the prior art, the contact area between the first rod portion and the pole can be increased, and the impedance of the contact interface between the connecting piece and the pole can be reduced, which is helpful to improve the performance and life of the cylindrical battery.

[0024] The utility model also provides a cylindrical battery using the cylindrical battery cover plate, which has better performance and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the cover structure of a cylindrical battery in the prior art;

[0027] Figure 2 A schematic diagram of the structure of a cylindrical battery cover provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the structure of a connecting piece provided in an embodiment of the utility model;

[0029] in, Figure 2-Figure 3 middle:

[0030] The pole 101 ; the second insulating plate 102 ; the cover plate 103 ; the first insulating plate 104 ; the insulating seal ring 105 ; the connector 106 ; the end cap 161 ; the connecting rod 162 ; the first rod portion 1621 ; the second rod portion 1622 ; and the adapter 107 . DETAILED DESCRIPTION

[0031] The utility model embodiment discloses a cylindrical battery cover plate, wherein the outer circumference of the first rod portion in the connector that is inserted and matched with the pole is uneven, and the outer circumference of the first rod portion is in contact with the hole wall of the second mounting hole of the pole, thereby increasing the contact area between the first rod portion and the pole, reducing the impedance of the contact interface between the two, and helping to improve the performance and life of the cylindrical battery. The utility model embodiment also discloses a cylindrical battery using the above cylindrical battery cover plate, which has better performance and longer service life.

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 2-3 The embodiment of the utility model provides a cylindrical battery cover, including a cover 103, a pole 101 and a connector 106; the cover 103 is provided with a first mounting hole; the pole 101 is provided with a second mounting hole; the connector 106 includes an end cap 161 and a connecting rod 162, one end of the connecting rod 162 is fixedly connected to the end cap 161; the connecting rod 162 is passed through the first mounting hole of the cover 103 and the second mounting hole of the pole 101, and the cover 103 is located between the pole 101 and the end cap 161; the cover 103 is insulated from the connector 106 and the pole 101 respectively; wherein the part of the connecting rod 162 that is plug-in matched with the pole 101 is the first rod portion 1621, the outer circumferential surface of the first rod portion 1621 is uneven, and the outer circumferential surface of the first rod portion 1621 is in contact with the hole wall of the second mounting hole.

[0034] In the above-mentioned cylindrical battery cover, the outer circumferential surface of the first rod portion 1621 in the connecting piece 106 that is inserted into and matched with the pole 101 is uneven, and the outer circumferential surface of the first rod portion 1621 is in contact with the hole wall of the second mounting hole of the pole 101. Compared with the solution of riveting the cover plate 103 and the pole 101 by rivets in the prior art, the contact area between the first rod portion 1621 and the pole 101 can be increased, thereby reducing the impedance of the contact interface between the connecting piece 106 and the pole 101, which helps to improve the performance and life of the cylindrical battery.

[0035] The outer circumference of the first rod portion 1621 in the connecting rod 162 is a serrated surface or a wavy surface. In this embodiment, the outer circumference of the first rod portion 1621 is coupled with the hole wall of the second mounting hole, which can improve the torsion resistance of the pole 101, prevent the pole 101 from twisting due to external force, and improve the assembly reliability of the entire cylindrical battery cover.

[0036] In some embodiments, the first rod portion 1621 and the pole 101 may be configured to be interference fit, so that the pole 101 and the cover plate 103 are assembled through the connector 106 .

[0037] In other embodiments, an anti-dropping convex edge is processed at one end of the first rod portion 1621 away from the cover plate 103, and the cover plate 103 and the pole 101 are located between the end cap 161 and the anti-dropping convex edge. The anti-dropping convex edge is processed by the end of the connecting rod 162 after the connecting rod 162 is passed through the first mounting hole of the cover plate 103 and the second mounting hole of the pole 101.

[0038] The part of the connecting rod 162 that is plugged into the cover plate 103 is the second rod portion 1622, and the cross-sectional shape of the second rod portion 1622 is the same as the shape of the first mounting hole; the second rod portion 1622 is fixedly connected to the first rod portion 1621, and the end of the second rod portion 1622 that is away from the first rod portion 1621 is fixedly connected to the end cap 161.

[0039] The second rod portion 1622 and the first rod portion 1621 may be configured as an integral structure. Of course, the two may also be configured as separate bodies and fixedly connected by welding or the like, which is not specifically limited in this embodiment.

[0040] The cross-sectional shape of the second rod portion 1622 is circular, and correspondingly, the first mounting hole is a circular hole. Of course, the cross-sectional shape of the second rod portion 1622 can also be set to be an ellipse, a triangle, or a rectangle, etc., and correspondingly, the first mounting hole is an ellipse, a triangle, or a rectangle, etc. This embodiment does not limit the cross-sectional shape of the second rod portion 1622 and the shape of the first mounting hole, and only needs to ensure that the two shapes are the same.

[0041] In the above cylindrical battery cover, the outer circumferential surface of the first rod portion 1621 does not protrude radially from the outer circumferential surface of the second rod portion 1622 at any point, so as to ensure that the connecting rod 162 can be inserted into the first mounting hole while preventing the gap between the connecting rod 162 and the hole wall of the first mounting hole in the cover 103 from being too large.

[0042] Insulating plates mounted on the connecting rod 162 are provided on both sides of the cover plate 103, wherein the first insulating plate 104 is clamped between the end cap 161 and the cover plate 103, and the second insulating plate 102 is clamped between the cover plate 103 and the pole 101; an insulating sealing ring 105 is provided between the outer peripheral surface of the connecting rod 162 and the hole wall of the first mounting hole.

[0043] The insulating seal ring 105 includes a cylindrical main body and a skirt fixed to the outside of one end of the main body; the skirt is sandwiched between the first insulating plate 104 and the cover plate 103. The skirt and the main body can be set as an integrated structure.

[0044] In the scheme in which an anti-slip convex edge is processed at one end of the first rod portion 1621 away from the cover plate 103 so that the cover plate 103 and the pole 101 are riveted, the first insulating plate 104, the cover plate 103, the second insulating plate 102, and the pole 101 can be fixed along the axial direction of the connecting rod 162 by processing the anti-slip convex edge, and the skirt of the above-mentioned insulating sealing ring 105, the first insulating plate 104, the second insulating plate 102 and the pole 101 are squeezed under the action of the end cap 161 and the anti-slip convex edge, and the cover plate 103 is insulated from the connecting piece 106 and the pole 101 respectively.

[0045] A countersunk hole is provided on the surface of the second insulating plate 102 facing the pole 101 , and the pole 101 is located in the countersunk hole.

[0046] The cylindrical battery cover plate further includes a transfer plate 107 , which is welded to the end cap 161 of the connector 106 , and the transfer plate 107 is insulated from the cover plate 103 under the action of the first insulating plate 104 .

[0047] The embodiment of the utility model provides a cylindrical battery, comprising a cylindrical battery cover plate, and the cylindrical battery cover plate is the cylindrical battery cover plate provided in the above embodiment.

[0048] The cylindrical battery provided in this embodiment uses the cylindrical battery cover provided in the above embodiment, which has better performance and longer service life. Of course, the cylindrical battery provided in this embodiment also has other effects related to the cylindrical battery cover provided in the above embodiment, which will not be repeated here.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cylindrical battery cover, characterized in that: include: A cover plate, wherein the cover plate is provided with a first mounting hole; A pole, wherein the pole is provided with a second mounting hole; A connecting piece, the connecting piece comprises an end cap and a connecting rod, one end of the connecting rod is fixedly connected to the end cap; the connecting rod is passed through the first mounting hole and the second mounting hole, the cover plate is located between the pole and the end cap; the cover plate is insulated from the connecting piece and the pole respectively; The part of the connecting rod that is plugged into the pole is a first rod portion, the outer circumference of the first rod portion is uneven, and the outer circumference of the first rod portion fits with the hole wall of the second mounting hole.

2. The cylindrical battery cover according to claim 1, characterized in that: The outer peripheral surface of the first rod portion in the connecting rod is a serrated surface or a wavy surface.

3. The cylindrical battery cover according to claim 1, characterized in that: The first rod portion is interference fit with the pole; or an anti-dropout convex edge is processed on one end of the first rod portion away from the cover plate, and the cover plate and the pole are located between the end cap and the anti-dropout convex edge.

4. The cylindrical battery cover according to claim 1, characterized in that: The part of the connecting rod that is plugged into the cover plate is the second rod portion, and the cross-sectional shape of the second rod portion is the same as the shape of the first mounting hole; the second rod portion is fixedly connected to the first rod portion, and the end of the second rod portion that is away from the first rod portion is fixedly connected to the end cap.

5. The cylindrical battery cover according to claim 4, characterized in that: The cross-section of the second rod portion is circular.

6. The cylindrical battery cover according to claim 4, characterized in that: No part of the outer circumferential surface of the first rod portion protrudes beyond the outer circumferential surface of the second rod portion in the radial direction.

7. The cylindrical battery cover according to claim 1, characterized in that: Insulating plates sleeved on the connecting rod are provided on both sides of the cover plate, wherein a first insulating plate is clamped between the end cap and the cover plate, and a second insulating plate is clamped between the cover plate and the pole; an insulating sealing ring is provided between the outer peripheral surface of the connecting rod and the hole wall of the first mounting hole.

8. The cylindrical battery cover according to claim 7, characterized in that: The insulating sealing ring comprises a cylindrical main body and a skirt fixed outside one end of the main body; the skirt is sandwiched between the first insulating plate and the cover plate.

9. The cylindrical battery cover according to claim 8, characterized in that: A countersunk hole is provided on the surface of the second insulating plate facing the pole, and the pole is located in the countersunk hole.

10. A cylindrical battery, characterized in that: It comprises a cylindrical battery cover plate, wherein the cylindrical battery cover plate is the cylindrical battery cover plate according to any one of claims 1-9.