Battery top cover and square battery

Abstract

The utility model provides a battery top cover and a square battery, and the battery top cover comprises a cover plate, upper plastic, a pole, a connecting sheet and a sealing ring, a first mounting groove is formed in the top surface of the cover plate; the upper plastic cement is mounted in the first mounting groove, and a second mounting groove is formed in the upper plastic cement; the pole is mounted in the second mounting groove, and a first connecting hole is formed in the pole; the connecting piece comprises a connecting piece body and a boss, the connecting piece body is located below the cover plate, the boss is arranged on the connecting piece body, and the boss penetrates through the cover plate and the upper plastic and is connected with the first connecting hole; the sealing ring is arranged on the boss in a sleeving mode and located between the boss and the cover plate. The lug is connected with the first connecting hole through the boss, so that the tab can be welded in larger areas on the two sides of the boss on the connecting sheet body, the welding interference is avoided, the size of the connecting sheet can be reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover and a square battery. Background Art

[0002] In existing battery structures, the electrode and tab are often connected via laser or ultrasonic welding, which easily leaves residual slag. Furthermore, electrolyte corrosion during battery use can easily cause new slag to fall off, accumulating in the aluminum shell and forming an electron path connecting the negative electrode and the aluminum shell, causing corrosion and perforation of the aluminum shell. Furthermore, the tabs typically need to be welded over the tabs. To avoid interference, the tab-to-electrode welding area and the tab-to-tab welding area must be avoided, which increases the size of the tabs and is costly. Utility Model Content

[0003] In view of this, the present invention proposes a battery top cover and a square battery to solve the technical problem proposed in the above background technology that the tabs generally need to be wrapped around the top of the connecting piece and welded to the connecting piece. In order to avoid interference, the welding area between the connecting piece and the pole and the welding area between the connecting piece and the tabs need to be avoided, and the volume of the connecting piece needs to be expanded, which is costly.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] In a first aspect, the present invention provides a battery top cover, including a cover plate, an upper plastic, a terminal, a connecting piece, and a sealing ring, wherein:

[0006] The top surface of the cover plate is provided with a first mounting groove;

[0007] The upper plastic is installed in the first installation groove, and a second installation groove is provided on the upper plastic;

[0008] The pole is installed in the second installation slot, and a first connection hole is provided on the pole;

[0009] The connecting piece includes a connecting piece body and a boss, wherein the connecting piece body is located below the cover plate, and the boss is provided on the connecting piece body, passes through the cover plate and the upper plastic, and is connected to the first connecting hole;

[0010] The sealing ring is sleeved on the boss and located between the boss and the cover plate.

[0011] On the basis of the above technical solution, preferably, the boss is inserted into the first connecting hole and welded to the inner wall of the first connecting hole.

[0012] On the basis of the above technical solution, preferably, the boss and the first connecting hole are riveted together without rivets.

[0013] On the basis of the above technical solution, preferably, when the boss is riveted to the first connection hole, the top surface of the boss is flush with the top surface of the pole.

[0014] On the basis of the above technical solution, preferably, it further comprises a lower plastic, wherein the lower plastic is connected to the bottom surface of the cover plate, and the connecting piece body is located below the lower plastic.

[0015] Based on the above technical solution, preferably, a first mounting hole is provided at the bottom of the first mounting groove, a second mounting hole is provided at the bottom of the second mounting groove, a third mounting hole is provided on the lower plastic, the boss passes through the third mounting hole, the first mounting hole and the second mounting hole in sequence, and the sealing ring is provided in the second mounting hole.

[0016] On the basis of the above technical solution, preferably, the lower plastic is connected to the cover plate by screws or hot melt columns.

[0017] On the basis of the above technical solution, preferably, a positioning hole is provided on the lower plastic, and the sealing ring is partially inserted into the positioning hole.

[0018] Based on the above technical solution, preferably, the top surface of the upper plastic is flush with the top surface of the cover.

[0019] In a second aspect, the utility model provides a square battery, comprising a bottom shell and a battery cell, and the battery top cover described in the first aspect, wherein the battery cell is placed in the bottom shell, and the cover is connected to the bottom shell.

[0020] The battery top cover of the present invention has the following beneficial effects compared with the prior art:

[0021] (1) The first connection hole is provided on the pole, the boss is provided on the connecting piece body, the boss passes through the cover plate and the upper plastic, and is connected to the first connection hole. The tabs can be welded to a larger area on both sides of the boss on the connecting piece body, while avoiding welding interference, and reducing the volume of the connecting piece, thereby reducing costs;

[0022] (2) The boss is inserted into the first connection hole and welded to the inner wall of the first connection hole to complete the connection between the pole and the connecting piece. The welding slag generated by the welding is caught by the boss and does not fall into the bottom shell, thereby preventing the bottom shell from being corroded.

[0023] (3) The connection between the pole and the connecting piece is completed by riveting the boss and the first connecting hole without rivets, which does not generate welding slag and is lower in cost than welding, thereby improving the reliability and stability of the device;

[0024] (4) The connecting piece is connected to the bottom surface of the cover plate through the lower plastic, and the connecting piece body is located below the lower plastic. The lower plastic is used to insulate the cover plate above the connecting piece to avoid the risk of short circuit caused by the connection between the cover plate and the conductive part below, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 An exploded view of the battery top cover connected by thermal melting according to the present invention;

[0027] Figure 2 A three-dimensional diagram of a battery top cover connected by hot melt according to the present invention;

[0028] Figure 3 It is a structural schematic diagram of the cover plate of the present utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the upper plastic of the present invention;

[0030] Figure 5 This is a schematic structural diagram of the connecting piece of the utility model;

[0031] Figure 6 This is an exploded view of the battery top cover without rivets of the present invention;

[0032] Figure 7 This is a schematic structural diagram of a battery top cover without rivets (before riveting) according to the present invention;

[0033] Figure 8 It is a structural schematic diagram of the battery top cover without rivets (after riveting) of the present invention.

[0034] Description of reference numerals: 1-cover plate, 2-upper plastic, 3-pole, 4-connecting piece, 5-sealing ring, 6-lower plastic;

[0035] 11-first mounting slot, 12-first mounting hole, 13-second connecting hole;

[0036] 21-second mounting slot, 22-second mounting hole;

[0037] 31-first connecting hole;

[0038] 41-connecting piece body, 42-boss;

[0039] 61-third mounting hole, 62-heat-melt column, 63-positioning hole. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0041] Reference Figures 1-8 As shown, the first embodiment of the present invention provides a battery top cover, including a cover plate 1, an upper plastic 2, a terminal, a connecting piece 4 and a sealing ring 5, wherein:

[0042] The top surface of the cover plate 1 is provided with two first mounting grooves 11, the first mounting grooves 11 can be square, and the two first mounting grooves 11 can be symmetrically arranged with the center line of the cover plate 1 as the symmetry axis;

[0043] The upper plastic 2 is installed in the first installation groove 11. The upper plastic 2 is square. There are two upper plastics 2. The second installation groove 21 is square.

[0044] The pole is installed in the second installation slot 21, and a first connection hole 31 is provided on the pole;

[0045] The connecting piece 4 includes a connecting piece body 41 and a boss 42. The connecting piece body 41 is located below the cover plate 1. The boss 42 is provided on the connecting piece body 41. The boss 42 passes through the cover plate 1 and the upper plastic 2 and is connected to the first connecting hole 31.

[0046] The sealing ring 5 is sleeved on the boss 42 and located between the boss 42 and the cover plate 1 , and can seal the connection between the cover plate 1 and the boss 42 while insulating the boss 42 and the cover plate 1 .

[0047] The battery top cover proposed in this embodiment is provided with a first connection hole 31 on the pole, and the boss 42 is provided on the connecting piece body 41. The boss 42 passes through the cover plate 1 and the upper plastic 2 and is connected to the first connection hole 31. The tabs can be welded to the larger area on both sides of the boss 42 on the connecting piece body 41. While avoiding welding interference, the volume of the connecting piece 4 can be reduced, thereby reducing costs.

[0048] In some embodiments, the boss 42 is inserted into the first connection hole 31 and welded to the inner wall of the first connection hole 31. The connection between the terminal and the connecting piece 4 is completed by inserting the boss 42 into the first connection hole 31 and welding it to the inner wall of the first connection hole 31. Welding slag is caught by the boss 42 and does not fall into the bottom shell, thereby preventing corrosion of the bottom shell.

[0049] In some embodiments, the boss 42 is riveted to the first connection hole 31 using rivetless riveting. This rivetless riveting of the boss 42 and the first connection hole 31 allows the connection between the pole and the connecting piece 4 to be achieved without generating welding slag and at a lower cost than welding, thereby improving the reliability and stability of the device. The boss 42 can be pressed into the first connection hole 31 of the pole, or the first connection hole 31 of the pole can be pressed into the boss 42, to achieve rivetless riveting between the connecting piece 4 and the pole. When rivetless riveting is used, the negative pole does not require the use of a copper-aluminum composite plate, and the pole and connecting piece can be directly connected.

[0050] In some embodiments, when the boss 42 is riveted to the first connection hole 31, the top surface of the boss 42 is flush with the top surface of the terminal. This flushness between the top surface of the boss 42 and the top surface of the terminal facilitates verification of the proper alignment of the boss 42 and the terminal during riveting. Furthermore, the boss 42 does not protrude from the top surface of the terminal, thus preventing any impact on the battery's electrical connection. This facilitates battery placement and provides a more aesthetically pleasing appearance.

[0051] In some embodiments, the battery top cover further includes a lower plastic 6, which is connected to the bottom surface of the cover plate 1, and the connecting piece body 41 is located below the lower plastic 6. The lower plastic 6 is connected to the bottom surface of the cover plate 1, and the connecting piece body 41 is located below the lower plastic 6. The lower plastic 6 insulates the cover plate 1 above the connecting piece 4, thereby preventing the risk of short circuit caused by the cover plate 1 connecting to the conductive member below, thereby improving the reliability of the device.

[0052] In some embodiments, a first mounting hole 12 is provided at the bottom of the first mounting groove 11, a second mounting hole 22 is provided at the bottom of the second mounting groove 21, and a third mounting hole 61 is provided on the lower plastic 6. The boss 42 sequentially passes through the third mounting hole 61, the first mounting hole 12, and the second mounting hole 22, and the sealing ring 5 is disposed in the second mounting hole 22. The boss 42 sequentially passes through the third mounting hole 61, the first mounting hole 12, and the second mounting hole 22, and the sealing ring 5 is disposed in the second mounting hole 22. The sealing ring 5 seals the second mounting hole 22, thereby sealing the cover plate 1 at the connection position with the boss 42 and insulating the boss 42 from the cover plate 1.

[0053] In some embodiments, the lower plastic 6 is connected to the cover 1 via a heat-melt column 62 . The lower plastic 6 is provided with a heat-melt column 62 . The bottom surface of the cover 1 is provided with a second connection hole 13 . The heat-melt column 62 is inserted into the connection hole and connected by heat-melt.

[0054] In some embodiments, the lower plastic 6 is connected to the cover plate 1 by screws. Connecting the lower plastic 6 and the cover plate 1 by screws facilitates the installation and removal of the lower plastic 6 and the cover plate 1, and the screws can be reused to reduce costs.

[0055] In some embodiments, the lower plastic 6 is provided with a positioning hole 63, and the sealing ring 5 is partially inserted into the positioning hole 63. By partially inserting the sealing ring 5 into the positioning hole 63, the connection of the lower plastic 6 can be positioned, facilitating the connection between the lower plastic 6 and the cover 1, and improving the convenience of device assembly.

[0056] In some embodiments, the top surface of the upper plastic 2 is flush with the top surface of the cover 1. By flushing the top surface of the upper plastic 2 with the top surface of the cover 1, the cover 1 and the pole can be completely isolated, thereby improving the insulation performance and the reliability of the device.

[0057] The working principle of the battery top cover is: the sealing ring 5 is sleeved on the boss 42, the boss 42 passes through the cover plate 1 and the upper plastic 2, and is connected to the first connecting hole 31, and the tabs can be welded to the larger area on both sides of the boss 42 on the connecting piece body 41. While avoiding welding interference, the volume of the connecting piece 4 can be reduced, thereby reducing costs.

[0058] The second embodiment of the present invention provides a square battery, comprising a bottom shell and a battery cell, and the battery top cover described in the first embodiment, wherein the battery cell is placed in the bottom shell, and the cover plate 1 is connected to the bottom shell.

[0059] The square battery proposed in this embodiment can avoid the welding area between the connecting piece 4 and the pole and the welding area between the connecting piece 4 and the tab, and can also reduce the volume of the connecting piece 4, thereby reducing costs.

[0060] 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 battery top cover, characterized in that: It comprises a cover plate (1), an upper plastic (2), a pole (3), a connecting piece (4) and a sealing ring (5), wherein: The top surface of the cover plate (1) is provided with a first mounting groove (11); The upper plastic (2) is installed in the first installation groove (11), and a second installation groove (21) is provided on the upper plastic (2); The pole (3) is installed in the second installation groove (21), and a first connection hole (31) is provided on the pole (3); The connecting piece (4) comprises a connecting piece body (41) and a boss (42), wherein the connecting piece body (41) is located below the cover plate (1), and the boss (42) is arranged on the connecting piece body (41), and the boss (42) passes through the cover plate (1) and the upper plastic (2), and is connected to the first connecting hole (31); The sealing ring (5) is sleeved on the boss (42) and is located between the boss (42) and the cover plate (1).

2. The battery top cover according to claim 1, wherein: The boss (42) is inserted into the first connecting hole (31) and welded to the inner wall of the first connecting hole (31).

3. The battery top cover according to claim 1, wherein: The boss (42) and the first connecting hole (31) are riveted without rivets.

4. The battery top cover according to claim 3, wherein: When the boss (42) is riveted to the first connection hole (31), the top surface of the boss (42) is flush with the top surface of the pole (3).

5. The battery top cover according to claim 1, wherein: It also includes a lower plastic (6), the lower plastic (6) is connected to the bottom surface of the cover plate (1), and the connecting piece body (41) is located below the lower plastic (6).

6. The battery top cover according to claim 5, characterized in that: A first mounting hole (12) is provided at the bottom of the first mounting groove (11), a second mounting hole (22) is provided at the bottom of the second mounting groove (21), a third mounting hole (61) is provided on the lower plastic (6), the boss (42) passes through the third mounting hole (61), the first mounting hole (12) and the second mounting hole (22) in sequence, and the sealing ring (5) is provided in the second mounting hole (22).

7. The battery top cover according to claim 6, wherein: The lower plastic (6) is connected to the cover plate (1) via screws or hot melt columns (62).

8. The battery top cover according to claim 7, wherein: A positioning hole (63) is provided on the lower plastic (6), and the sealing ring (5) is partially inserted into the positioning hole (63).

9. The battery top cover according to claim 1, wherein: The top surface of the upper plastic (2) is flush with the top surface of the cover plate (1).

10. A square battery, characterized in that: The battery comprises a bottom shell and a battery cell, and a battery top cover according to any one of claims 1 to 9, wherein the battery cell is placed in the bottom shell, and the cover plate (1) is connected to the bottom shell.

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