Cylindrical battery cover plate structure

Abstract

The utility model relates to the technical field of battery cover plates, and provides a cylindrical battery cover plate structure which comprises a top cover, a pole and a connecting piece, and the pole is fixed on the top cover in a penetrating manner; the connecting piece comprises a current collecting disc and an adapter piece, and a folding hole is formed in the current collecting disc; the switching piece is arranged in the folding hole, one end of the switching piece is integrally formed with one side wall in the folding hole, the other end of the switching piece is fixed and electrically connected with the pole, and the switching piece can be bent to move out of the folding hole. According to the utility model, the folding hole is formed in the current collecting disc, the switching piece is arranged in the folding hole, and one end of the switching piece and one side in the folding hole are integrally formed, so that the connecting piece can be conveniently processed, the connecting piece can be prevented from being bent for multiple times in the process of entering the shell, and the shell entering efficiency and the assembly precision of the connecting piece are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery covers, in particular to a cylindrical battery cover structure. Background Art

[0002] The cover structure of a cylindrical battery typically consists of a top cover, a rivet, a lower plastic part, and a terminal. The rivet passes through the lower plastic part, the top cover, and connects to the terminal. To ensure an effective connection between the terminal and the cell tab, a current collector plate is also required below the lower plastic part to connect the terminal tab and the terminal.

[0003] The utility model with the announcement number CN219591534U discloses a battery cover assembly and a cylindrical battery, including a top cover, a terminal, a lower plastic part, a current collecting plate and a rivet. The current collecting plate, the lower plastic part, the top cover and the terminal are connected in sequence through the rivet. The side of the lower plastic part away from the top cover is provided with a notch for the current collecting plate to pass through. Blocking plates are symmetrically arranged on both sides of the notch. The blocking plates are made of insulating material and are movably arranged on the lower plastic part. The two blocking plates cooperate with each other to close or open the notch. After the current collecting plate is folded, the utility model closes the notch by making the two blocking plates dock with each other at the notch, thereby limiting the position of the bend of the folded current collecting plate, preventing the bend of the current collecting plate from extending along the notch when the cylindrical battery is mechanically vibrated, thereby preventing the current collecting plate from contacting and short-circuiting with the shell, thereby improving the safety performance of the cylindrical battery.

[0004] In the above solution, in order to achieve conductivity between the tab and the pole, a current collecting plate is welded between the two, and the current collecting plate is limited by a notch and a blocking plate. However, when assembling the battery, the current collecting plate needs to be bent multiple times, which is not conducive to improving the shell insertion efficiency and assembly accuracy of the current collecting plate. Utility Model Content

[0005] In view of this, the present invention proposes a cylindrical battery cover structure, which facilitates the insertion of the connecting piece into the shell and improves the efficiency of the insertion of the connecting piece into the shell.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a cylindrical battery cover structure, including a top cover, a pole and a connecting piece, wherein:

[0007] The pole is fixed on the top cover through the pole;

[0008] The connecting piece includes a collecting plate and an adapter plate, and a folding hole is opened in the collecting plate; the adapter plate is arranged in the folding hole, and one end of the adapter plate is integrally formed with one of the side walls in the folding hole, and the other end is fixed to the pole and electrically connected, and the adapter plate can be bent to move out of the folding hole.

[0009] On the basis of the above technical solution, preferably, a buffer hole is opened on the collecting disk, the buffer hole is connected to the folding hole, and the inner wall thereof is continuously arranged with the end of the adapter away from the pole.

[0010] More preferably, there are two buffer holes, which are arranged on two sides of the adapter plate opposite to each other.

[0011] More preferably, the cross section of the buffer hole is semicircular.

[0012] On the basis of the above technical solution, preferably, it further includes an explosion-proof valve, which is fixedly arranged in the top cover.

[0013] More preferably, when the adapter plate is arranged in the folding hole, the top cover and the current collecting plate are arranged at intervals.

[0014] More preferably, the adapter plate includes a connecting portion and a folding portion, wherein:

[0015] One end of the connecting portion is integrally formed on one of the side walls in the folding hole, and is perpendicular to the collecting plate;

[0016] One end of the folded portion is integrally formed with an end of the connecting portion away from the current collecting disk, and the other end is fixed to and electrically connected to the pole, and the folded portion is parallel to the current collecting disk.

[0017] On the basis of the above technical solution, preferably, the top corner of the adapter plate away from the current collecting plate is rounded.

[0018] On the basis of the above technical solution, preferably, when the adapter plate is arranged in the folding hole, the end of the adapter plate away from the collecting plate is in contact with the inner wall of the folding hole.

[0019] On the basis of the above technical solution, preferably, the folding hole and the adapter piece are both in a long strip structure.

[0020] The cylindrical battery cover structure of the utility model has the following advantages over the prior art:

[0021] (1) By providing a folding hole on the collecting plate, providing a transition piece in the folding hole, and allowing one end of the transition piece to be integrally formed with one side of the folding hole, it is not only convenient to process the connecting piece, but also can prevent the connecting piece from being bent multiple times during the shell insertion process, thereby improving the shell insertion efficiency and assembly accuracy of the connecting piece;

[0022] (2) By providing a buffer hole, the current collecting plate can be prevented from being torn when the adapter plate is bent, thereby improving the structural strength of the connecting plate;

[0023] (3) By setting the collecting plate and the top cover apart, the collecting plate can be prevented from clogging the explosion-proof valve, thereby ensuring the safe operation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a three-dimensional diagram of a cylindrical battery cover structure of the present invention in a state where the top cover is flipped outward;

[0026] Figure 2 This is a top view of a connecting piece in a cylindrical battery cover structure of the present invention;

[0027] Figure 3 This is a three-dimensional diagram of a cylindrical battery cover structure of the present invention;

[0028] Figure 4 This is a three-dimensional diagram of a connecting piece in a cylindrical battery cover structure of the present invention;

[0029] Figure 5 This is a cross-sectional view of the adapter plate in a cylindrical battery cover structure of the present invention.

[0030] Among them: 1. Top cover; 2. Pole; 3. Connecting piece; 31. Collecting plate; 32. Adapter; 321. Connecting part; 322. Folding part; 301. Folding hole; 302. Buffer hole; 4. Explosion-proof valve. DETAILED DESCRIPTION

[0031] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-5 As shown, a cylindrical battery cover structure of the present invention includes a top cover 1, a pole 2, a connecting piece 3 and an explosion-proof valve 4.

[0033] The top cover 1 is used to seal the battery housing and support components such as the pole 2 .

[0034] One end of the pole 2 is connected to the tab of the battery cell in the battery shell, and the other end is connected to the electrical equipment outside the battery. The pole 2 is fixed on the top cover 1 through.

[0035] The connecting piece 3 is used to conduct the pole 2 and the pole ear. The connecting piece 3 includes a current collecting plate 31 and an adapter plate 32. A folding hole 301 is opened in the current collecting plate 31; the adapter plate 32 is arranged in the folding hole 301, and one end of the adapter plate 32 is integrally formed with one of the side walls in the folding hole 301, and the other end is fixed to the pole 2 and electrically connected. The adapter plate 32 can be bent to move out of the folding hole 301; when assembling the battery, first place the current collecting plate 31 in the battery housing, and then follow the steps of Figure 1 Turn the top cover 1 and the adapter 32 outward in the manner shown, and the collecting plate 31 can be exposed to the external space, so that the collecting plate 31 and the battery cell tab can be welded. After the welding is completed, Figure 3 The top cover 1 can be moved back to its original position in the manner shown, or the toughness of the adapter plate 32 can be used to make the top cover 1 and the adapter plate 32 automatically rebound to their original positions. During this assembly process, there is no need to bend the connecting plate 3 multiple times, which not only improves the efficiency of the connecting plate 3 entering the shell, but also helps to improve the accuracy of the connecting plate 3 entering the shell, and helps to reduce the space utilization of the connecting plate 3.

[0036] The adapter plate 32 is arranged in the folding hole 301 in the collecting plate 31 and is formed integrally therewith. Therefore, the adapter plate 32 and the collecting plate 31 can be directly processed by laser cutting, which can significantly improve the processing efficiency of the connecting plate 3 and reduce the defective rate.

[0037] The collecting plate 31 is provided with a buffer hole 302, which is connected to the folding hole 301, and the inner wall of the buffer hole 302 is continuously arranged with the end of the adapter plate 32 away from the pole 2; Figure 4 As shown, when the adapter plate 32 is flipped outward, the edge of the adapter plate 32 away from the pole 2 will be subjected to stress. By opening the buffer hole 302 between the adapter plate 32 and the side wall adjacent to the adapter plate 32 in the buffer hole 302, stress can be avoided from being concentrated at one point, causing the folding hole 301 to be torn, thereby achieving a certain protective effect.

[0038] In order to improve the anti-tearing effect, it is preferred to provide two buffer holes 302, which are relatively arranged on both sides of the adapter plate 32 to fully protect the folding hole 301; and in order to improve the anti-tearing effect, it is preferred to make the cross section of the buffer hole 302 semicircular.

[0039] The explosion-proof valve 4 is used to disperse the pressure generated inside the battery to the outside of the battery shell, thereby ensuring the safe use of the battery. The explosion-proof valve 4 is fixedly arranged in the top cover 1.

[0040] When the adapter piece 32 is arranged in the folding hole 301, the top cover 1 and the current collecting plate 31 are spaced apart, thereby preventing the current collecting plate 31 from blocking the explosion-proof valve 4, thereby ensuring the normal use of the battery.

[0041] As a preferred embodiment, the adapter plate 32 includes a connecting portion 321 and a folding portion 322. Figure 5 As shown, one end of the connecting portion 321 is integrally formed on one of the side walls in the folding hole 301, and is perpendicular to the collecting disc 31; one end of the folding portion 322 is integrally formed with the end of the connecting portion 321 away from the collecting disc 31, and the other end is fixed to the pole 2 and electrically connected, and the folding portion 322 is parallel to the collecting disc 31. By setting the connecting portion 321, the side of the folding portion 322 close to the top cover 1 is spaced apart from the side of the collecting disc 31 close to the top cover 1, so that the top cover 1 and the collecting disc 31 are spaced apart to prevent the collecting disc 31 from blocking the explosion-proof valve 4.

[0042] like Figures 1-4 As shown, the top corner of the adapter plate 32 away from the collecting disc 31 is rounded. The end of the adapter plate 32 away from the collecting disc 31 is the end where the adapter plate 32 is connected to the pole 2. When flattening the adapter plate 32, problems such as flipping or tearing at the corners of the adapter plate 32 are avoided. Of course, the position in the folding hole 301 corresponding to the rounded corner of the adapter plate 32 should also be set to a rounded shape.

[0043] When the adapter plate 32 is set in the folding hole 301, the end of the adapter plate 32 away from the collecting plate 31 is in contact with the inner wall of the folding hole 301, that is, the length of the folding hole 301 is the same as the length of the adapter plate 32, so that when the adapter plate 32 is flattened, the two can fit tightly.

[0044] The folding hole 301 and the adapter piece 32 are both in the form of long strips, and their shapes include but are not limited to rectangle, trapezoid, triangle and ellipse.

[0045] The method of using the cylindrical battery cover structure of the utility model is as follows:

[0046] When assembling the battery, first fix the adapter plate 32 away from one end of the current collecting plate 31, the lower plastic plate and the pole 2 on the top cover 1, then place the current collecting plate 31 in the battery shell, then flip the top cover 1 outward, weld the current collecting plate 31 and the pole ears of the battery cell in the battery shell, and finally move the adapter plate 32 back into the folding hole 301, and seal the top cover 1 and the battery shell.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cylindrical battery cover structure, characterized in that: It comprises a top cover (1), a pole (2) and a connecting piece (3), wherein: The pole (2) is fixed through the top cover (1); The connecting piece (3) comprises a current collecting disc (31) and an adapter piece (32); a folding hole (301) is provided in the current collecting disc (31); the adapter piece (32) is arranged in the folding hole (301), and one end thereof is integrally formed with one of the side walls in the folding hole (301), and the other end is fixed to and electrically connected to the pole (2); the adapter piece (32) can be bent to move out of the folding hole (301).

2. The cylindrical battery cover structure according to claim 1, wherein: A buffer hole (302) is provided on the current collecting plate (31), the buffer hole (302) is connected to the folding hole (301), and the inner wall thereof is continuously arranged with the end of the adapter plate (32) away from the pole (2).

3. The cylindrical battery cover structure according to claim 2, wherein: There are two buffer holes (302), and the two buffer holes (302) are arranged oppositely on two sides of the adapter plate (32).

4. The cylindrical battery cover structure according to claim 3, wherein: The cross section of the buffer hole (302) is semicircular.

5. The cylindrical battery cover structure according to claim 1, wherein: It also includes an explosion-proof valve (4), which is fixedly arranged in the top cover (1).

6. The cylindrical battery cover structure according to claim 5, characterized in that: When the adapter plate (32) is arranged in the folding hole (301), the top cover (1) and the current collecting plate (31) are spaced apart.

7. The cylindrical battery cover structure according to claim 6, characterized in that: The adapter plate (32) includes a connecting portion (321) and a folding portion (322), wherein: One end of the connecting portion (321) is integrally formed on one of the side walls in the folding hole (301), and is perpendicular to the collecting plate (31); One end of the folded portion (322) is integrally formed with an end of the connecting portion (321) away from the current collecting disk (31), and the other end is fixed to and electrically connected to the pole (2), and the folded portion (322) is parallel to the current collecting disk (31).

8. The cylindrical battery cover structure according to claim 1, wherein: The top corner of the adapter plate (32) at one end away from the current collecting plate (31) is rounded.

9. The cylindrical battery cover structure according to claim 1, wherein: When the adapter plate (32) is arranged in the folding hole (301), the end of the adapter plate (32) away from the current collecting plate (31) abuts against the inner wall of the folding hole (301).

10. The cylindrical battery cover structure according to claim 1, characterized in that: The folding hole (301) and the adapter plate (32) are both in the form of long strips.

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