Riveting cover plate and battery

Abstract

The utility model belongs to the technical field of power batteries, and discloses a riveting cover plate and a battery. The riveting cover plate comprises a top cover piece, a pole, upper plastic and a riveting aluminum block, a first through hole is formed in the top cover piece in a penetrating mode, the upper plastic is provided with a groove, a second through hole is formed in the groove in a penetrating mode, the cross section of the groove is in a trapezoid shape with the sectional area sequentially decreasing from top to bottom, and a riveting hole is formed in the riveting aluminum block in a penetrating mode. The pole sequentially penetrates through the first through hole and the second through hole to be riveted with the hole wall of the riveting hole, and the riveting aluminum block is located in the groove so that the upper plastic can be clamped between the top cover piece and the riveting aluminum block. Through the arrangement, the root gap between the upper plastic and the riveting aluminum block is reduced, so that the risk that the riveting aluminum block inclines in the upper plastic is avoided, the upper plastic with the inclined side wall is equivalent to a draft angle arranged on the upper plastic, demolding is facilitated after the upper plastic is formed, and the upper plastic is prevented from being damaged; and the finished product quality of the whole riveted cover plate is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power battery technical field especially relates to a riveting cover plate and battery. BACKGROUND

[0002] The new energy power battery in prior art includes combined cover plate, and the combined cover plate is divided into riveting or injection molding two kinds.The riveting combined cover plate includes top cover sheet, pole, upper plastic part and riveting aluminum block, wherein the pole is installed on the top cover sheet, the upper plastic part is insulated and arranged between the top cover sheet and the upper plastic part, the riveting aluminum block is cooperatively installed on the upper plastic part and is riveted and arranged on the pole to enable the pole to be fixedly installed on the top cover sheet.

[0003] The riveting aluminum block and the upper plastic part are often connected in a straight body gap cooperation mode, but this cooperation mode can increase the cooperation gap, and the riveting aluminum block can be inclined and deflected after being cooperated with the upper plastic part, which can reduce the cooperation precision of the combined cover plate and the product yield.

[0004] Based on the above, the riveting cover plate and the battery are needed to solve the problems in the prior art. UTILITY MODEL CONTENTS

[0005] One purpose of the utility model is to provide a riveting cover plate, which can reduce the risk of inclination and deflection of the riveting aluminum block after being cooperated with the upper plastic part, improve the cooperation precision and ensure the product yield.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The riveting cover plate includes a top cover sheet, a pole, an upper plastic and a riveting aluminum block, the top cover sheet is provided with a first through hole, the upper plastic has a groove, the groove is provided with a second through hole, and the cross section of the groove is a trapezoidal shape with the cross section area decreasing from top to bottom, the riveting aluminum block is provided with a riveting hole, the pole is riveted to the hole wall of the first through hole, the second through hole and the riveting hole in sequence, and the riveting aluminum block is located in the groove to clamp the upper plastic between the top cover sheet and the riveting aluminum block.

[0008] Preferably, a positioning part is arranged between the upper plastic and the riveting aluminum block, the positioning part is used for positioning the riveting aluminum block in the upper plastic to limit the circumferential rotation of the riveting aluminum block along the axis of the second through hole.

[0009] Preferably, one of the groove and the riveting aluminum block is provided with a positioning groove, and the other of the groove and the riveting aluminum block is provided with a positioning block, and the positioning block is limitingly arranged in the positioning groove.

[0010] As preferred, the groove bottom is provided with one of the positioning slot and the positioning block, and the riveting aluminum block bottom is provided with the other one.

[0011] As preferred, the groove bottom is provided with the positioning slot, and the riveting aluminum block bottom is provided with the positioning block.

[0012] As preferred, along the circumferential direction of the second through hole, the groove bottom is provided with at least two positioning slots.

[0013] Along the circumferential direction of the riveting aluminum block axis, the riveting aluminum block bottom is provided with at least two positioning blocks, and the positioning blocks are one-to-one connected to the positioning slots.

[0014] As preferred, along the circumferential direction of the second through hole, the groove bottom is provided with four positioning slots.

[0015] Along the circumferential direction of the riveting aluminum block axis, the riveting aluminum block bottom is provided with four positioning blocks.

[0016] As preferred, the positioning slot comprises two first cross-section slots and two second cross-section slots, the horizontal cross-section areas of the first cross-section slots and the second cross-section slots are different, and the two first cross-section slots are adjacently arranged, and the two second cross-section slots are adjacently arranged.

[0017] The positioning block comprises a first cross-section block and a second cross-section block, the horizontal cross-section areas of the first cross-section block and the second cross-section block are different, and the two first cross-section blocks are adjacently arranged, and the two second cross-section blocks are adjacently arranged.

[0018] The horizontal cross-section area of the first cross-section slot is equal to the horizontal cross-section area of the first cross-section block, and the first cross-section block is limitingly inserted into the first cross-section slot, the horizontal cross-section area of the second cross-section slot is equal to the horizontal cross-section area of the second cross-section block, and the second cross-section block is limitingly inserted into the second cross-section slot.

[0019] As preferred, the root gap between the groove side wall bottom and the riveting aluminum block is 0.03mm, and the mouth gap between the groove side wall top and the riveting aluminum block is 0.08-0.2mm.

[0020] Another purpose of the utility model is to provide a battery, through setting above riveting cover plate, can reduce riveting aluminum block same upper plastic piece cooperation after existence skew deflection risk, improve cooperation precision, ensure battery product quality.

[0021] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0022] The battery comprises a battery cell, a shell, and the riveting cover plate as described above, the shell contains the battery cell, and the riveting cover plate is arranged at the open end of the shell.

[0023] The riveting cover plate has the advantages that: the groove in the trapezoidal shape is arranged on the upper plastic, the gap between the upper plastic and the riveting aluminum block is reduced, the risk of the riveting aluminum block being skewed and deflected in the upper plastic is avoided, the upper plastic with the inclined side wall is equivalent to arranging a draft angle on the upper plastic, the upper plastic is easy to be demolded after being formed, and the upper plastic is prevented from being damaged, and the product quality of the riveting cover plate is effectively improved.

[0024] The battery has the advantages that: the riveting aluminum block in the riveting cover plate of the battery is stable in installation in the upper plastic, the skewing phenomenon is avoided, the pole can be uniformly deformed by being uniformly stressed in the riveting process of the riveting aluminum block, the forming quality of the pole is ensured, and the quality of the whole battery is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the riveting cover plate provided by the utility model embodiment;

[0026] Figure 2 is an exploded view of the riveting cover plate provided by the utility model embodiment;

[0027] Figure 3 is a top view of the riveting cover plate provided by the utility model embodiment;

[0028] Figure 4 is a sectional view along A-A in the figure; Figure 3

[0029] Figure 5 is an enlarged view of the part B in the figure; Figure 4

[0030] Figure 6 is a structural schematic view of the upper plastic provided by the utility model embodiment;

[0031] Figure 7 is a structural schematic view of the riveting aluminum block provided by the utility model embodiment.

[0032] In the figure:

[0033] 1, top cover sheet; 11, first through hole;

[0034] 2, pole; 21, positive pole terminal; 22, negative pole terminal;

[0035] ​​3, upper plastic; 31, groove; 311, second through hole; 312, positioning groove; 3121, first cross-sectional groove; 3122, second cross-sectional groove;

[0036] 4, riveted aluminum block; 41, riveting hole; 42, positioning block; 421, first cross-sectional block; 422, second cross-sectional block;

[0037] 5, lower plastic;

[0038] 6, sealing ring;

[0039] 7, explosion-proof valve assembly. DETAILED DESCRIPTION

[0040] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0041] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of the embodiment, the terms "up", "down", "right", "left" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0044] As Figures 1 to 7 shown, the utility model provides a riveting cover plate, including top cover piece 1, pole 2, upper plastic 3 and riveting aluminium block 4, top cover piece 1 is provided with first through -hole 11, upper plastic 3 has recess 31, recess 31 is provided with second through -hole 311, and the cross section of recess 31 is trapezoidal shape that cross section area decreases gradually from top to bottom, riveting aluminium block 4 is provided with riveting hole 41, pole 2 passes first through -hole 11, second through -hole 311 in proper order and is riveted with the hole wall of riveting hole 41, riveting aluminium block 4 is located in recess 31, to set up upper plastic 3 in top cover piece 1 and riveting aluminium block 4. Through setting up the recess 31 of trapezoidal shape on upper plastic 3, make the root gap between upper plastic 3 and riveting aluminium block 4 reduce, to avoid the risk that riveting aluminium block 4 produces skew deflection in upper plastic 3, and the side wall is inclined upper plastic 3, equivalent to setting up a draft angle on upper plastic 3, make upper plastic 3 be easy to demould after forming, prevent upper plastic 3 damage, through the above setting, effectively increase the finished product quality of entire riveting cover plate.

[0045] Optionally, as shown in Figure 5 in the embodiment, the root gap m between the side wall bottom of recess 31 and riveting aluminium block 4 is 0.03mm, and the mouth gap n between the side wall top of recess 31 and riveting aluminium block 4 is in the range of 0.08-0.2mm. For example, the mouth gap between the side wall top of recess 31 and riveting aluminium block 4 can be 0.08mm, 0.1mm, 0.12mm, 0.14mm, 0.15mm, 0.18mm or 0.2mm, and the utility model is not limited thereto.

[0046] It should be noted that, as shown in Figure 2 in the embodiment, the top cover piece 1 is provided with one first through-hole 11 at each end, and the pole 2 includes a positive pole terminal 21 and a negative pole terminal 22. One of the first through-holes 11 is used to mount the positive pole terminal 21, and the other first through-hole 11 is used to mount the negative pole terminal 22. The positive pole terminal 21 and the negative pole terminal 22 are each insulated from the top cover piece 1 by one upper plastic 3 and are each riveted to the top cover piece 1 by one riveting aluminium block 4. Therefore, the structures of the positive pole terminal 21 and the negative pole terminal 22 at the two positions are the same. For ease of description, the positive pole terminal 21 and the components near it will be taken as examples for detailed description below.

[0047] Specifically, as shown in Figure 6 and Figure 7As shown, in this embodiment, a positioning part is also provided between the upper plastic 3 and the riveted aluminum block 4. The positioning part can position the riveted aluminum block 4 in the upper plastic 3 to restrict the circumferential rotation of the riveted aluminum block 4 along the axis of the second through hole 311, so that the connection stability between the riveted aluminum block 4 and the upper plastic 3 is higher, and the riveted aluminum block 4 can be prevented from deflecting and loosening when riveting the pole post 2, thereby further ensuring the finished quality of the riveted cover plate.

[0048] In one embodiment of this invention, a positioning groove 312 is provided on the groove 31, and a positioning block 42 is provided on the riveted aluminum block 4. The positioning block 42 is positioned within the positioning groove 312, thus restricting the movement of the positioning block 42. This allows the riveted aluminum block 4 to be stably installed in the upper plastic 3, preventing rotation of the riveted aluminum block 4. Moreover, the above positioning method is simple, convenient, and easy to implement. Of course, in other embodiments, a positioning block 42 can also be provided on the groove 31, and a positioning groove 312 can be provided on the riveted aluminum block 4. This can also achieve circumferential positioning of the riveted aluminum block 4, and this invention is not limited to this.

[0049] Furthermore, a positioning groove 312 is provided at the bottom of the groove 31, and a positioning block 42 is provided at the bottom of the riveting aluminum block 4. After the riveting aluminum block 4 is placed in the groove 31, the positioning block 42 can be screwed in and snapped into the positioning groove 312 by appropriately adjusting the installation angle of the riveting aluminum block 4, thereby allowing the riveting aluminum block 4 to be conveniently and quickly installed in the upper plastic 3. The positioning groove 312 and the positioning block 42 have the same cross-sectional shape, and this utility model does not limit the cross-sectional shape of the positioning groove 312 and the positioning block 42. For example, in this embodiment, the cross-sectional shape of the positioning groove 312 and the positioning block 42 is square. In other embodiments, the cross-sectional shape of the positioning groove 312 and the positioning block 42 can also be circular or other polygonal shapes, as long as it can ensure that the positioning block 42 is circumferentially limited and installed in the groove 31.

[0050] Furthermore, in this embodiment, at least two positioning grooves 312 are provided at the bottom of the groove 31 along the circumferential direction of the second through hole 311, and at least two positioning blocks 42 are provided at the bottom of the riveted aluminum block 4 along the circumferential direction of the axis of the riveted aluminum block 4. The positioning blocks 42 are connected to the positioning grooves 312 one by one, so as to further improve the positioning stability of the riveted aluminum block 4 by increasing the number of positioning grooves 312 and positioning blocks 42.

[0051] Preferably, along the circumferential direction of the second through hole 311, four positioning grooves 312 are provided at the bottom of the groove 31, and along the circumferential direction of the axis of the riveted aluminum block 4, four positioning blocks 42 are provided at the bottom of the riveted aluminum block 4. This allows the riveted aluminum block 4 to be more stably installed in the groove 31 of the upper plastic 3 while controlling manufacturing costs, thus meeting the stability requirements of actual working conditions. Of course, in other embodiments, the number of positioning grooves 312 and positioning blocks 42 can also be multiple, and this utility model is not limited in this respect.

[0052] It should be noted that, in order to ensure the installation accuracy of the riveted aluminum block 4 and prevent misoperation, in this embodiment, the positioning groove 312 includes a first cross-sectional groove 3121 and a second cross-sectional groove 3122. The horizontal cross-sectional areas of the first cross-sectional groove 3121 and the second cross-sectional groove 3122 are different, and the two first cross-sectional grooves 3121 are arranged adjacent to each other, and the two second cross-sectional grooves 3122 are arranged adjacent to each other. The positioning block 42 includes a first cross-sectional block 421 and a second cross-sectional block 422. The horizontal cross-sectional areas of the first cross-sectional groove 3121 are equal to the horizontal cross-sectional area of ​​the first cross-sectional block 421, and the first cross-sectional block 421 is inserted into the first cross-sectional groove 3121. The horizontal cross-sectional area of ​​the second cross-sectional groove 3122 is equal to the horizontal cross-sectional area of ​​the second cross-sectional block 422, and the second cross-sectional block 422 is inserted into the second cross-sectional groove 3122.

[0053] By inserting the first cross-section block 421 and the second cross-section block 422 into the corresponding first cross-section groove 3121 and second cross-section groove 3122, the riveting aluminum block 4 can only be assembled in one correct way, thereby avoiding incorrect installation or reversed orientation by the staff, playing the role of preventing the riveting aluminum block 4 from being mistaken, and thus ensuring the riveting quality of the riveting aluminum block 4 on the pole post 2.

[0054] It should be noted that the riveted cover plate provided in this embodiment also includes a lower plastic 5, a sealing ring 6, and an explosion-proof valve assembly 7. The lower plastic 5 is sandwiched between the top cover plate 1, the lower side, and the terminal post 2. The sealing ring 6 is fitted onto the terminal post 2 and sandwiched between the terminal post 2 and the top cover plate 1 to ensure insulation between the terminal post 2 and the top cover plate 1. The explosion-proof valve assembly 7 is installed at the explosion-proof hole of the top cover plate 1. When the internal pressure or temperature of the battery exceeds the safe range, the explosion-proof valve assembly 7 can open, allowing the gas generated inside the battery to escape through the explosion-proof hole, thereby reducing the temperature and pressure inside the casing, preventing battery explosion, and ensuring safety. Since the lower plastic 5, the sealing ring 6, and the explosion-proof valve assembly 7 are all conventional technologies in the field, they will not be described in detail here.

[0055] This embodiment also provides a battery, which includes a battery cell, a casing, and the aforementioned riveting cover plate. The battery cell is housed within the casing, and the top cover plate 1 of the riveting cover plate seals over the opening of the casing. The terminal post 2 of the riveting cover plate is electrically connected to the battery cell. In this embodiment, the riveting aluminum block 4 can be stably installed within the upper plastic 3 in the riveting cover plate, avoiding skewing. This ensures that during the riveting process of the aluminum block 4, the terminal post 2 is subjected to uniform force and undergoes uniform deformation, guaranteeing the forming quality of the terminal post 2 and thus ensuring the overall quality of the battery.

[0056] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clinch cover plate characterized by, The utility model relates to a battery top cover, including top cover sheet (1), pole (2), upper plastic (3) and riveting aluminum block (4), first through -hole (11) is set through on the top cover sheet (1), the upper plastic (3) has recess (31), recess (31) is set through with second through -hole (311), and the cross section of recess (31) is trapezoidal shape that the cross section area decreases gradually from top to bottom, riveting hole (41) is set through in riveting aluminum block (4), pole (2) passes through first through -hole (11), second through -hole (311) and riveting hole (41) hole wall riveting in proper order, riveting aluminum block (4) is located in recess (31), to clamp the upper plastic (3) between top cover sheet (1) and riveting aluminum block (4).

2. The clinch cover plate of claim 1, wherein, Positioning part is arranged between the upper plastic (3) and the riveting aluminum block (4), the positioning part is used for positioning the riveting aluminum block (4) in the upper plastic (3), to limit the riveting aluminum block (4) circumferential rotation along the axis of the second through -hole (311).

3. The clinch cover plate of claim 2, wherein, One of the recess (31) and the riveting aluminum block (4) is provided with a positioning groove (312), and the other of the recess (31) and the riveting aluminum block (4) is provided with a positioning block (42), the positioning block (42) is limitingly arranged in the positioning groove (312).

4. The clinch cover plate of claim 3, wherein, The groove bottom of the recess (31) is provided with one of the positioning groove (312) and the positioning block (42), and the bottom of the riveting aluminum block (4) is provided with the other of the positioning groove (312) and the positioning block (42).

5. The clinch cover plate of claim 4, wherein, The groove bottom of the recess (31) is provided with the positioning groove (312), and the bottom of the riveting aluminum block (4) is provided with the positioning block (42).

6. The clinch cover plate of claim 5, wherein, Along the circumferential direction of the second through -hole (311), the groove bottom of the recess (31) is provided with at least two positioning grooves (312). Along the circumferential direction of the axis of the riveting aluminum block (4), the bottom of the riveting aluminum block (4) is provided with at least two positioning blocks (42), and the positioning blocks (42) are one-to-one connected to the positioning grooves (312).

7. The clinch cover plate of claim 6, wherein, Along the circumferential direction of the second through -hole (311), the groove bottom of the recess (31) is provided with four positioning grooves (312). Along the circumferential direction of the axis of the riveting aluminum block (4), the bottom of the riveting aluminum block (4) is provided with four positioning blocks (42).

8. The clinch cover plate of claim 7, wherein, The positioning groove (312) includes two first cross-section grooves (3121) and two second cross-section grooves (3122), the horizontal cross-sectional areas of the first cross-section grooves (3121) and the second cross-section grooves (3122) are different, and the two first cross-section grooves (3121) are arranged adjacent to each other, and the two second cross-section grooves (3122) are arranged adjacent to each other. The positioning blocks (42) comprise first cross-section blocks (421) and second cross-section blocks (422), horizontal cross-section areas of the first cross-section blocks (421) and the second cross-section blocks (422) are different, two first cross-section blocks (421) are arranged adjacently, and two second cross-section blocks (422) are arranged adjacently; The horizontal cross-section area of the first cross-section groove (3121) is equal to the horizontal cross-section area of the first cross-section block (421), and the first cross-section block (421) is limitingly inserted into the first cross-section groove (3121); the horizontal cross-section area of the second cross-section groove (3122) is equal to the horizontal cross-section area of the second cross-section block (422), and the second cross-section block (422) is limitingly inserted into the second cross-section groove (3122).

9. The clinch cover plate according to any one of claims 1-8, characterized in that, The root gap between the bottom of the side wall of the groove (31) and the riveted aluminum block (4) is 0.03 mm, and the mouth gap between the top of the side wall of the groove (31) and the riveted aluminum block (4) is 0.08-0.2 mm.

10. A battery characterized by The riveted cover plate is used for sealing the open mouth of the shell containing the electric core.

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