Pole column flanging riveting cover plate structure and battery cell

Abstract

The utility model belongs to the technical field of battery components, and particularly relates to a terminal post flanging riveting cover plate structure and a battery cell, the cover plate structure comprises an upper plastic ring, a steel ring, an upper substrate, a terminal post and a lower plastic plate which are sequentially arranged from top to bottom; the upper substrate is detachably connected with the lower plastic plate, and pole holes are respectively formed in corresponding positions of the upper substrate and the lower plastic plate; the base of the pole is arranged in the mounting groove of the lower plastic plate; the insertion section of the pole penetrates through the pole hole of the upper substrate, so that the upper end of the pole is arranged in the upper plastic ring in the pole hole; a riveting section is arranged on the upper end surface of the pole, the riveting section extends along the radial direction of the pole hole, and a steel ring is arranged on a binding surface between the lower end surface of the riveting section and the upper plastic ring. According to the utility model, a riveting block in the prior art is replaced by the roller riveting flanging structure of the pole, so that the number of the cover plate components is reduced; and meanwhile, the steel ring is additionally arranged on the limiting part of the upper plastic ring, so that the problem that the upper plastic ring is fractured can be effectively solved, and the assembly risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery components, and in particular relates to a pole flanging riveted cover plate structure and a battery core. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Today, the new energy vehicle industry is booming, and the lightweight of batteries has become a research direction for major battery cell manufacturers. Traditional battery cell poles are often riveted, using poles, aluminum blocks and plastic for riveting and assembly.

[0004] However, the height of the aluminum block plus the plastic riveting will make the pole too high, resulting in low space utilization of the battery and heavy weight of the entire pole. Moreover, after riveting, a laser welding process is required, which will not only increase production costs, but also may cause poor welding problems. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a pole flanging riveted cover plate structure and a battery cell.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the utility model provides a pole flanging riveted cover plate structure, comprising an upper plastic ring, a steel ring, an upper base plate, a pole and a lower plastic plate arranged in sequence from top to bottom;

[0008] The upper base plate is detachably connected to the lower plastic plate, and pole holes are respectively provided at corresponding positions of the upper base plate and the lower plastic plate;

[0009] The base of the pole is arranged in the mounting groove of the lower plastic plate, and the insertion section of the pole passes through the pole hole of the upper base plate so that the upper end of the pole is placed in the upper plastic ring in the pole hole;

[0010] The upper end surface of the pole is provided with a riveted section, the riveted section extends along the radial direction of the pole hole, and a steel ring is provided on the fitting surface between the lower end surface of the riveted section and the upper plastic ring.

[0011] Furthermore, a sealing ring is provided on the fitting surface between the base of the pole and the pole hole of the upper substrate.

[0012] Furthermore, the riveting section is arranged along the circumference of the upper end surface of the pole.

[0013] Furthermore, a limiting portion is provided circumferentially at the inner edge of the upper plastic ring;

[0014] The upper end surface of the limiting portion is arranged lower than the upper end surface of the upper plastic ring, and the lower end surface of the limiting portion protrudes from the lower end surface of the upper plastic ring to form an insertion portion;

[0015] The upper end surface of the limiting portion is used for placing a steel ring, and the inserting portion is used for inserting into the gap between the pole hole of the upper substrate and the pole.

[0016] Furthermore, a positioning portion is provided on the lower end surface of the upper plastic ring, and positioning grooves cooperating with the positioning portion are provided around the pole hole of the upper substrate.

[0017] Furthermore, the number of the pole holes in the upper substrate is two, and the two pole holes are respectively a positive pole hole and a negative pole hole.

[0018] Furthermore, the number of positioning grooves arranged around the positive electrode post hole and the negative electrode post hole is different.

[0019] Furthermore, the mounting groove is opened along the periphery of the pole hole of the lower plastic plate.

[0020] Furthermore, the upper plastic ring is in the shape of a regular polygon or a circle.

[0021] A second aspect of the utility model provides a battery core, comprising a pole flanging riveted cover plate structure provided by the first aspect of the utility model.

[0022] One or more of the above technical solutions have the following beneficial effects:

[0023] (1) The present invention utilizes the flange structure of the pole itself to replace the riveting block in the prior art, thereby reducing the number of cover plate components, thereby significantly reducing the cost and weight of the cover plate. At the same time, if the riveting section directly compresses the upper plastic ring, the riveting force is too large, which may cause the upper plastic to be fractured, resulting in insulation or poor sealing. Therefore, in the present invention, a steel ring is added to the limiting portion of the upper plastic ring, which can effectively improve the problem of the upper plastic ring being fractured and reduce assembly risks.

[0024] (2) The utility model has a positioning portion on the lower end surface of the upper plastic ring, and a positioning groove cooperating with the positioning portion is provided around the pole hole of the upper substrate; through the cooperation of the positioning portion and the positioning groove, on the one hand, a positioning function is provided for the upper plastic ring; on the other hand, a torsional force in the axial direction is provided for the upper plastic ring, thereby improving the torsional strength of the pole.

[0025] (3) In the present invention, different numbers of positioning parts with different intervals are provided on the lower end surfaces of the plastic ring on the negative electrode and the plastic ring on the positive electrode, and the same number of positioning grooves with the same intervals are provided on the upper substrate; the purpose is to facilitate the distinction between the plastic rings on the positive and negative electrodes, and to provide error-proof identification for automatic line production, so as to realize fool-proof design during mass production and assembly of products.

[0026] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0028] Figure 1 This is an exploded view of a pole flange riveted cover plate structure of Example 1.

[0029] Figure 2 This is a cross-sectional view of a pole flange riveted cover plate structure of Example 1.

[0030] Figure 3 (a) and (b) are a top view and a bottom structure schematic diagram of the upper plastic ring of Example 1.

[0031] Figure 4 (a) and (b) are a top view and a cross-sectional view of the pole of Example 1.

[0032] Figure 5 This is a cross-sectional view of another flanged riveted pole of Example 1.

[0033] In the figure, 1, upper plastic ring, 11 limiting part, 12 inserting part, 13 positioning part, 2, steel ring, 3, upper base plate, 31 pole hole, 32 positioning groove, 4, sealing ring, 5, pole, 51 pole base, 52 pole insertion end, 53 riveting section, 54 pole roller groove, 6, lower plastic plate, 61 installation groove. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiment 1

[0036] like Figure 1 , Figure 2 As shown, the utility model proposes a pole flanging riveted cover plate structure, comprising an upper base plate 3, a pole 5 and a lower plastic plate 6 arranged in sequence from top to bottom;

[0037] The upper base plate 3 is detachably connected to the lower plastic plate 6. The upper base plate 3 and the lower plastic plate 6 are provided with pole holes 31 at corresponding positions, and the upper plastic ring 1 is provided in the pole hole of the upper base plate 3.

[0038] The base of the pole 5 is arranged in the mounting groove 61 of the lower plastic plate 6, and the insertion section 52 of the pole 5 passes through the pole hole of the upper base plate 3 so that the upper end of the pole is placed in the upper plastic ring 1 in the pole hole;

[0039] The upper end of the pole 5 is arranged in the upper plastic ring 1; the upper end surface of the pole 5 is provided with a riveted section 53, the riveted section 53 extends along the radial direction of the pole hole, and a steel ring 2 is provided on the fitting surface between the lower end surface of the riveted section 53 and the upper plastic ring 1; a sealing ring 4 is provided on the fitting surface between the base of the pole 5 and the pole hole of the upper substrate 3.

[0040] In the present invention, the base material at the outer periphery of the upper end surface of the pole 5 is rolled outward to form a riveted section 53, which extends radially along the pole hole 31, and the lower end surface is overlapped to the steel ring 2, thereby compressing the upper plastic ring and the upper base plate, thereby achieving the purpose of compressing the sealing ring 4 and realizing the sealing of the cover plate structure.

[0041] Considering that if the riveting section 53 directly compresses the upper plastic ring, the upper plastic may be fractured due to excessive riveting force, resulting in insulation or poor sealing problems; therefore, in the utility model, a steel ring is added to the limiting portion 11 of the upper plastic ring, which can effectively improve the problem of the upper plastic ring being fractured and reduce assembly risks.

[0042] At the same time, by utilizing the roller riveting flange structure of the pole itself, the riveting block in the prior art can be eliminated, the number of cover plate components can be reduced, the cost and weight of the cover plate can be significantly reduced, and the space utilization rate can be greatly improved. Moreover, the pole flange riveting structure provided by the utility model does not require welding, which can reduce the scrap rate caused by the welding process after traditional riveting and reduce production costs.

[0043] As a further technical solution, the riveting section 53 is arranged along the circumference of the upper end surface of the pole.

[0044] In the present invention, the riveting section 53 is arranged along the circumference of the upper end surface of the pole, which can effectively improve the sealing effect compared with a single-point or multi-point arrangement.

[0045] As a further technical solution, Figure 3 As shown in (a) and (b), a limiting portion 11 is provided circumferentially at the inner edge of the upper plastic ring 1;

[0046] The upper end surface of the limiting portion 11 is set lower than the upper end surface of the upper plastic ring 1, and the lower end surface of the limiting portion 11 protrudes from the lower end surface of the upper plastic ring 1 to form an insertion portion 12; the upper end surface of the limiting portion is used to place the steel ring, and the insertion portion 12 of the lower end surface of the limiting portion is used to be inserted into the pole hole of the upper substrate to achieve sealing of the gap between the pole hole and the pole.

[0047] In the present invention, the limiting portion 11, the inserting portion 12 and the positioning portion 13 are integrally injection molded. The upper end surface of the upper plastic ring limiting portion 11 is lower than the upper end surface of the upper plastic ring 1, and the two form a stepped structure. The upper end surface of the upper plastic ring 1 is lower than the upper end surface of the riveting section 53, which is conducive to the roller groove flanging forming of the riveting section and is conducive to processing and production.

[0048] The insertion portion 12 of the upper plastic ring and the insertion section 52 of the pole are both inserted into the pole hole of the upper base plate 3, and the insertion portion 12 of the upper plastic ring conflicts with the insertion section 52 of the pole, in order to increase the fixing assembly effect, achieve sealing, and improve the pole connection strength.

[0049] As a further technical solution, a positioning portion 13 is provided on the lower end surface of the upper plastic ring 1, and a positioning groove 32 matching with the positioning portion 13 is provided around the pole hole of the upper substrate 1;

[0050] The lower end surface of the upper plastic ring 1 is provided with different numbers of positioning parts at different intervals; the positioning part can be a cylinder or other shapes. In this embodiment, it is a cylinder, and the upper substrate is provided with the same number of positioning grooves at the same intervals. Through the cooperation of the positioning part and the positioning groove, on the one hand, a positioning function is provided for the upper plastic ring; on the other hand, a torsional force in the axial direction is provided for the upper plastic ring, thereby improving the torsional strength of the pole.

[0051] There are two pole holes in the upper substrate 3, which are respectively a positive pole hole and a negative pole hole; the numbers of positioning grooves arranged around the positive pole hole and the negative pole hole are different.

[0052] In order to distinguish the plastic rings on the positive and negative electrodes and provide error-proof identification for automatic line production, the number and spacing of the positioning parts of the plastic rings on the positive and negative electrodes are different; in this embodiment, four positioning parts are set on the positive electrode, three positioning parts are set on the negative electrode, and corresponding positioning grooves are set on the upper substrate.

[0053] As a further technical solution, in the present embodiment, the shape of the upper plastic ring 1 is a regular hexagon, and can also be set to other shapes such as a square, a regular polygon, a circle, etc. according to needs.

[0054] As a further technical solution, Figure 4As shown in (a) and (b) , the pole 5 includes a pole base 51, a pole insertion section 52 and a riveted section 53; one end of the pole insertion section 52 is fixedly arranged on the pole base 51, and the other end is circumferentially provided with a riveted section 53.

[0055] The size of the pole base 51 is larger than that of the pole insertion section 52. The sealing ring 4 is arranged on the upper plane of the pole base 51 and is matched with the upper base plate 3 after riveting. The sealing ring is compressed by the pressure applied by riveting to complete the sealing of the cover plate.

[0056] There are two ways to achieve flanging riveting of the riveted section 53 of the pole 5. One is to open a pole roller groove 54 on the upper end surface of the pole insertion section 52, and use the roller groove rotary riveting extrusion method to extend the aluminum material around the roller groove 54 outward to form the riveted section 53, and then overlap the steel ring and compress the upper plastic ring to form an assembly, fixation and sealing effect.

[0057] The pole base 51 in the utility model has the same shape as the mounting groove 61. The pole base 51 is square. The four corners are cut off to reduce weight and cost. At the same time, in order to prevent the positive and negative poles from being fooled during assembly on the automatic production line, the positive pole base is cut into a 45° angle and the negative pole base is cut into a 50° angle in this embodiment. Other angles are also possible. The angle cutting design reduces the pole weight on the one hand, and increases the pole torque in cooperation with the mounting groove 61 in the lower plastic plate 6 on the other hand.

[0058] Another way is Figure 5 As shown, the pole machine adds a riveting section 53, and during assembly, the riveting section is folded outward by 90° overlapped with the steel ring for compression and sealing. The design of the riveting section 53 extending radially along the pole through hole and overlapping the steel ring can achieve the assembly and sealing of the pole, the upper plastic ring and the upper base plate. If the riveting section 53 is lacking in the flanging design or the design of the riveting section 53 is unreasonable, the cover plate will be short-circuited.

[0059] Embodiment 2

[0060] The utility model provides a battery core, comprising a pole flanging riveted cover plate structure provided in the first embodiment of the utility model.

[0061] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A pole flange riveted cover plate structure, characterized in that: It includes an upper plastic ring, a steel ring, an upper base plate, a pole and a lower plastic plate which are arranged in sequence from top to bottom; The upper base plate is detachably connected to the lower plastic plate, and pole holes are respectively provided at corresponding positions of the upper base plate and the lower plastic plate; The base of the pole is arranged in the mounting groove of the lower plastic plate, and the insertion section of the pole passes through the pole hole of the upper base plate so that the upper end of the pole is placed in the upper plastic ring in the pole hole; The upper end surface of the pole is provided with a riveted section, the riveted section extends along the radial direction of the pole hole, and a steel ring is provided on the fitting surface between the lower end surface of the riveted section and the upper plastic ring.

2. The pole flange riveted cover plate structure according to claim 1, characterized in that: A sealing ring is provided on the fitting surface between the base of the pole and the pole hole of the upper substrate.

3. The pole flange riveted cover plate structure according to claim 1, characterized in that: The riveting section is arranged along the circumference of the upper end surface of the pole.

4. The pole flange riveted cover plate structure according to claim 1, characterized in that: A limiting portion is provided circumferentially at the inner edge of the upper plastic ring; The upper end surface of the limiting portion is arranged lower than the upper end surface of the upper plastic ring, and the lower end surface of the limiting portion protrudes from the lower end surface of the upper plastic ring to form an insertion portion; The upper end surface of the limiting portion is used for placing a steel ring, and the inserting portion is used for inserting into the gap between the pole hole of the upper substrate and the pole.

5. The pole flange riveted cover plate structure according to claim 4, characterized in that: A positioning portion is provided on the lower end surface of the upper plastic ring, and positioning grooves matching with the positioning portion are provided around the pole hole of the upper substrate.

6. The pole flange riveted cover plate structure according to claim 1, characterized in that: The number of the pole holes in the upper substrate is two, and the two pole holes are respectively a positive pole hole and a negative pole hole.

7. The pole flange riveted cover plate structure according to claim 6, characterized in that: The number of positioning grooves arranged around the positive pole hole and the negative pole hole is different.

8. The pole flange riveted cover plate structure according to claim 1, characterized in that: The mounting groove is opened along the periphery of the pole hole of the lower plastic plate.

9. The pole flanging riveted cover plate structure according to claim 1, characterized in that: The upper plastic ring is in the shape of a regular polygon or a circle.

10. A battery cell, characterized in that: It comprises a pole flanging riveted cover plate structure as described in any one of claims 1 to 9.

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