Novel riveting top cover pole structure

Abstract

The utility model discloses a novel riveting top cover pole structure. The utility model discloses a novel riveting top cover pole structure, which comprises an optical aluminum sheet, a cover output terminal and a pole, the cover output terminal is provided with multiple stages of counter bores. The pole comprises a pole bottom plate, a limiting cylinder, a transition boss and a pole hanging table which are integrally formed, the diameter of the limiting cylinder is larger than the minimum aperture of the multi-stage counter bore, the diameter of the pole hanging table is smaller than the minimum aperture of the multi-stage counter bore, and the thickness of the pole hanging table is smaller than the height of a middle step of the multi-stage counter bore. According to the novel riveting top cover pole structure provided by the utility model, the pole comprising the pole bottom plate, the limiting cylinder, the transition boss and the pole hanging table is arranged, and the height of the transition boss is compressed by utilizing external force during riveting, so that the pole hanging table and the transition boss can be in close contact with the multi-stage counter bore, the contact area between the pole and the cover output terminal is increased, and the service life of the pole is prolonged. The resistance is reduced, and the calorific value of the battery during use is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a novel riveted top cover pole structure. Background Art

[0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and non-aqueous electrolyte solution. With the development of society and the advancement of technology, lithium batteries have entered a large-scale practical stage. Lithium batteries are widely used in mobile phones, laptops, power tools, electric vehicles, street lamp backup power supplies, navigation lights, etc.

[0003] At present, most riveted lithium-ion battery top cover poles are composed of columnar steps. The pole and the top cover output terminal are first riveted and then welded. No transition surface is set between the steps of the pole. During riveting, there is a certain gap between the joint surface of the pole and the top cover output terminal after riveting, resulting in a small joint surface area, large resistance, and high heat generation during use.

[0004] Therefore, it is necessary to provide a new type of riveted top cover pole structure to solve the above technical problems. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a novel riveted top cover pole structure which can increase the contact area between the pole and the cover output terminal, reduce the resistance, and reduce the heat generated by the battery during use.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A novel riveted top cover pole structure comprises: a cover output terminal and a pole installed on a bare aluminum sheet, wherein the cover output terminal and the pole have two groups, which are used as the positive electrode and the negative electrode of the battery respectively, and a multi-stage countersunk hole is provided on the cover output terminal, and the multi-stage countersunk hole has three inner surfaces with different diameters, so that it has two step surfaces with different diameters, and the inner hole diameter of the multi-stage countersunk hole decreases from top to bottom. The pole comprises an integrally formed pole bottom plate, a limiting cylinder, a transition boss and a pole hanging platform, wherein the pole bottom plate is arranged at the bottom and is used to be connected with the inside of the battery cell, the diameter of the limiting cylinder is larger than the minimum aperture of the multi-stage countersunk hole, the pole hanging platform is located at the top, and its diameter is slightly smaller than the minimum aperture of the multi-stage countersunk hole, and its thickness is slightly smaller than the height of the middle step of the multi-stage countersunk hole, and the transition boss is located between the limiting cylinder and the pole hanging platform, and plays the role of connecting the limiting cylinder and the pole hanging platform, and the bottom end diameter of the transition boss is not larger than the pole hanging platform diameter, and the top end diameter thereof is smaller than the pole hanging platform diameter.

[0008] Preferably, a positioning groove is provided at the top center of the pole hanging platform, and the positioning groove is hemispherical.

[0009] Preferably, an upper plastic pad matched with the cover output terminal is sleeved on the pole, the upper plastic pad is located between the bare aluminum sheet and the cover output terminal, and a slot matched with the upper plastic pad is opened on the bare aluminum sheet, and the installation position of the upper plastic pad is positioned by the slot.

[0010] Preferably, a lower plastic pad is installed at the bottom of the smooth aluminum sheet, and a positioning countersunk hole is opened on the upper side of the lower plastic pad.

[0011] Preferably, a sealing ring is installed in the installation hole of the bare aluminum sheet, and the sealing ring is sleeved on the limiting cylinder of the pole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model provides a pole including a pole bottom plate, a limiting cylinder, a transition boss and a pole hanging platform, and utilizes the external force during riveting to compress the height of the transition boss, so that the pole hanging platform and the transition boss can be in close contact with the multi-stage countersunk hole, thereby increasing the contact area between the pole and the cover output terminal, which is beneficial to reducing the resistance and reducing the heat generated by the battery during use;

[0014] (2) The utility model provides a positioning groove at the top center of the pole hanging platform, which can make the deformation of the pole hanging platform more uniform, which is conducive to reducing the gap between the pole hanging platform and the multi-stage countersunk hole;

[0015] (3) The utility model can conveniently seal the gap between the pole, the lower plastic pad and the bare aluminum sheet by providing a sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the installation of a new type of riveted top cover pole provided by the utility model;

[0017] Figure 2 for Figure 1 A partial cross-sectional structural schematic diagram of a novel riveted top cover pole structure shown;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the pole in the novel riveted top cover pole structure shown;

[0019] Figure 4 It is a schematic diagram of the assembly of riveting the front pole and the cover output terminal.

[0020] Among them, the names corresponding to the figure marks are: 1-plain aluminum sheet, 2-cover output terminal, 3-pole, 4-pole bottom plate, 5-limiting cylinder, 6-pole hanging platform, 7-transition boss, 8-multi-stage countersunk hole, 9-upper plastic pad, 10-lower plastic pad, 11-sealing ring. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0022] like Figure 1-4 As shown, a new type of riveted top cover pole structure provided by the utility model includes: a cover output terminal 2 and a pole 3 installed on a bare aluminum sheet 1, the cover output terminal 2 and the pole 3 have two groups, which are used as the positive electrode and the negative electrode of the battery respectively, and a multi-stage countersunk hole 8 is provided on the cover output terminal 2, and the multi-stage countersunk hole 8 has three inner surfaces with different diameters, so that it has two step surfaces with different diameters, and from top to bottom, the inner hole diameter of the multi-stage countersunk hole 8 decreases successively, and the pole 3 includes an integrally formed pole bottom plate 4, a limiting cylinder 5, a transition boss 7 and a pole hanging platform 6, and the pole bottom plate 4 is arranged at the bottom, which is used to connect with the inside of the battery cell, and the diameter of the limiting cylinder 5 is larger than the minimum aperture of the multi-stage countersunk hole 8. When assembled, the top of the limiting cylinder 5 is aligned with the cover output The bottom of the terminal 2 is in contact, and it cannot pass through the multi-stage countersunk hole 8, which plays a supporting and limiting role for the transition section 7 and the pole hanging platform 6 on the upper part. The pole hanging platform 6 is located at the top, and its diameter is slightly smaller than the minimum aperture of the multi-stage countersunk hole 8, and its thickness is slightly smaller than the height of the middle step of the multi-stage countersunk hole 8. The transition boss 7 is located between the limiting cylinder 5 and the pole hanging platform 6, and plays a role in connecting the limiting cylinder 5 and the pole hanging platform 6. The bottom end diameter of the transition boss 7 is not larger than the diameter of the pole hanging platform 6, and the top end diameter is smaller than the diameter of the pole hanging platform 6. When riveting, the top of the pole 3 passes through the light aluminum sheet 1 from the bottom and enters the multi-stage countersunk hole 8 of the cover output terminal 2. The pole hanging platform 6 part at the top of the pole 3 is press-riveted using equipment. The effect after riveting is shown in the figure. Figure 1-2 As shown, the top center of the pole hanging platform 6 is subjected to a downward force, so that the pole hanging platform 6 is squeezed downward, and then the transition boss 7 is deformed by force, so that the length of the transition boss 7 is shortened and the top diameter is enlarged, filling the gap between the original transition boss 7 and the multi-stage countersunk hole 8. The two are in close contact, and the riveting external force increases the diameter of the pole hanging platform 6, so that it fills the space where the step in the middle of the multi-stage countersunk hole 8 is located. The bottom and side of the pole hanging platform 6 are in close contact with the step surface and inner wall of the multi-stage countersunk hole 8, which greatly increases the contact surface between the pole 3 and the cover output terminal 2, which is beneficial to reduce the resistance and reduce the heat generated when the battery is used. Moreover, after the pole 3 is riveted, its top is located in the multi-stage countersunk hole 8, that is, the pole hanging platform 6 will not protrude from the cover output terminal 2, so it is beneficial to reduce the overall space occupied by the battery. The step cooperation between the pole hanging platform 6 and the multi-stage countersunk hole 8 can effectively prevent the pole 3 from escaping from the multi-stage countersunk hole 8, making the connection between the cover output terminal 2 and the pole 3 more stable.

[0023] By providing a pole 3 including a pole bottom plate 4, a limiting cylinder 5, a transition boss 7 and a pole hanging platform 6, the height of the transition boss 7 is compressed by utilizing the external force during riveting, so that the pole hanging platform 6 and the transition boss 7 can be in close contact with the multi-stage countersunk hole 8, thereby increasing the contact area between the pole 3 and the cover output terminal 2, which is beneficial to reducing the resistance and reducing the heat generated by the battery during use.

[0024] Embodiment 2:

[0025] A positioning groove (not shown in the figure) is opened at the top center of the pole hanging platform 6. The positioning groove is hemispherical and matched with the pressing head of the pressing equipment. When riveting, the pressing head is aligned with the positioning groove and pressed in. Since the positioning groove is located in the center, the force on the pole hanging platform 6 is evenly dispersed to the surroundings, thereby making the deformation around the pole hanging platform 6 more uniform. The pole hanging platform 6 can better contact with the multi-stage countersunk hole 8, which is conducive to reducing the generation of gaps.

[0026] By providing a positioning groove at the top center of the pole hanging platform 6 , the deformation of the pole hanging platform 6 can be made more uniform, which is beneficial to reducing the gap between the pole hanging platform 6 and the multi-stage countersunk hole 8 .

[0027] Embodiment 3:

[0028] like Figure 1-2 As shown, an upper plastic pad 9 matched with the cover output terminal 2 is sleeved on the pole 3, the upper plastic pad 9 is located between the bare aluminum sheet 1 and the cover output terminal 2, and a card slot matched with the upper plastic pad 9 is opened on the bare aluminum sheet 1, and the installation position of the upper plastic pad 9 is positioned by the card slot. The upper plastic pad 9 is used for insulation between the cover output terminal 2 and the bare aluminum sheet 1. When in use, the upper plastic pad 9 is stuck in the card slot at the top of the bare aluminum sheet 1, and then the cover output terminal 2 is stuck in the upper plastic pad 9, so that the cover output terminal 2 is positioned and installed, and the upper plastic pad 9 can insulate the cover output terminal 2 from the bare aluminum sheet 1.

[0029] By providing the upper plastic pad 9 , the cover output terminal 2 can be easily installed and positioned, and the cover output terminal 2 and the bare aluminum sheet 1 can be insulated.

[0030] Embodiment 4:

[0031] like Figure 1-2 As shown, a lower plastic pad 10 is installed at the bottom of the bare aluminum sheet 1, and a positioning countersunk hole is opened on the upper part of the lower plastic pad 10. When in use, the pole 3 passes through the positioning countersunk hole and comes out from the middle of the cover output terminal 2, thereby positioning the installation position of the pole 3, and the lower plastic pad 10 can insulate the pole bottom plate 4 at the bottom of the pole 3 from the bare aluminum sheet 1.

[0032] By providing the lower plastic pad 10 and opening the positioning countersunk hole, the installation position of the pole 3 can be conveniently positioned, and the pole bottom plate 4 and the bare aluminum sheet 1 can be insulated.

[0033] Embodiment 5:

[0034] like Figure 1-2 As shown, a sealing ring 11 is installed in the mounting hole of the bare aluminum sheet 1. The sealing ring 11 is sleeved on the limiting cylinder 5 of the pole 3, and a part of it fills the gap between the limiting cylinder 5 and the positioning countersunk hole. During installation, the sealing ring 11 is inserted into the positioning countersunk hole, and a part of it enters the mounting hole of the bare aluminum sheet 1, and then the pole 3 is inserted into the sealing ring 11, so that the limiting cylinder 5 squeezes the sealing ring 11, and then the gap between the pole 3 and the lower plastic pad 10 and the bare aluminum sheet 1 is sealed.

[0035] By providing the sealing ring 11 , the gap between the pole 3 and the lower plastic pad 10 and the bare aluminum sheet 1 can be conveniently sealed.

[0036] Working principle: When in use, the top of the pole 3 passes through the aluminum sheet 1 from below and enters the multi-level countersunk hole 8 of the output terminal 2. The pole hanging platform 6 at the top of the pole 3 is pressed and riveted by the equipment. The effect after riveting is shown in the figure. Figure 1-2 As shown, the top center of the pole hanging platform 6 is subjected to a downward force, so that the pole hanging platform 6 is squeezed downward, and then the transition boss 7 is deformed by force, so that the length of the transition boss 7 is shortened and the top diameter is enlarged, filling the gap between the original transition boss 7 and the multi-stage countersunk hole 8. The two are in close contact, and the riveting external force increases the diameter of the pole hanging platform 6, so that it fills the space where the step in the middle of the multi-stage countersunk hole 8 is located. The bottom and side of the pole hanging platform 6 are in close contact with the step surface and inner wall of the multi-stage countersunk hole 8, which greatly increases the contact surface between the pole 3 and the cover output terminal 2, which is beneficial to reduce the resistance and reduce the heat generated when the battery is used. Moreover, after the pole 3 is riveted, its top is located in the multi-stage countersunk hole 8, that is, the pole hanging platform 6 will not protrude from the cover output terminal 2, so it is beneficial to reduce the overall space occupied by the battery. The step cooperation between the pole hanging platform 6 and the multi-stage countersunk hole 8 can effectively prevent the pole 3 from escaping from the multi-stage countersunk hole 8, making the connection between the cover output terminal 2 and the pole 3 more stable.

Claims

1. A new type of riveted top cover pole structure, characterized in that: include: A bare aluminum sheet (1), a cover output terminal (2) and a pole (3); The cover output terminal (2) is provided with a multi-stage countersunk hole (8); The pole (3) comprises an integrally formed pole bottom plate (4), a limiting cylinder (5), a transition boss (7) and a pole hanging platform (6); the diameter of the limiting cylinder (5) is greater than the minimum aperture of the multi-stage countersunk hole (8); the diameter of the pole hanging platform (6) is less than the minimum aperture of the multi-stage countersunk hole (8); the thickness of the pole hanging platform (6) is less than the height of the middle step of the multi-stage countersunk hole (8); the bottom end diameter of the transition boss (7) is not greater than the diameter of the pole hanging platform (6); and the top end diameter of the transition boss (7) is less than the diameter of the pole hanging platform (6).

2. A novel riveted top cover pole structure according to claim 1, characterized in that: A hemispherical positioning groove is provided at the top center of the pole hanging platform (6).

3. The novel riveted top cover pole structure according to claim 1 is characterized in that: The pole (3) is sleeved with an upper plastic pad (9) that matches the cover output terminal (2), and the bare aluminum sheet (1) is provided with a slot that matches the upper plastic pad (9).

4. The novel riveted top cover pole structure according to claim 1 is characterized in that: A lower plastic pad (10) is installed at the bottom of the smooth aluminum sheet (1), and a positioning countersunk hole is opened on the upper side of the lower plastic pad (10).

5. The novel riveted top cover pole structure according to claim 1 is characterized in that: A sealing ring (11) is installed on the smooth aluminum sheet (1), and the sealing ring (11) is sleeved on the limiting cylinder (5).

6. The novel riveted top cover pole structure according to claim 1 is characterized in that: There are two groups of cover output terminals (2) and poles (3).

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