Battery cell top cover structure

Abstract

The utility model discloses a battery cell top cover structure, which relates to the technical field of energy storage batteries and comprises an aluminum plate, a pole and a first connecting piece arranged between the aluminum plate and the pole. A flanging is arranged on the aluminum plate; a groove is formed in the outer side of the pole; a first protrusion extending into the groove and a second protrusion extending towards the inner side of the flanging are arranged on the first connecting piece. The first connecting piece is an integrally-formed piece. According to the utility model, the connecting piece is arranged between the pole and the aluminum plate turnup, and the two bulges of the connecting piece are respectively matched and connected with the pole and the aluminum plate turnup, so that the connecting stability is better, the pole and the aluminum plate are effectively and stably separated, the structural strength is high, the use stability is strong, and the safety of the battery cell is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery technical field, specifically, relate to a top cover structure of electric core. BACKGROUND

[0002] The existing electric core cover plate usually includes a cover plate body, a pole assembly and a connecting block, the cover plate body is connected to the shell of the electric core unit, and the cover plate body plays a role of closing the electric core unit, and the connecting block is used for increasing the connecting area of the pole, so that the pole is connected with the external assembly. The pole assembly includes a pole and a lower insulating piece, a connecting hole is formed in the lower insulating piece, and the connecting end of the pole is arranged in the connecting hole, and the other end of the pole is connected with the connecting block after penetrating through the cover plate body. The end face of the connecting end is exposed to the connecting block, so as to be connected with the internal structure of the bare electric core and other electric core units.

[0003] The connection method of the electric core pole and the aluminum plate is gradually optimized from welding connection to the current rivet connection or spin rivet connection, so that the electric core pole and the aluminum plate have better connection effect and are more stable, for example, the connection method and connection structure of the electric core tab and the cover plate provided in Chinese patent invention patent CN114006094A, the connection method includes the following steps: first, processing the tab riveting hole and the cover plate riveting hole; then, pre-aligning the positive tab riveting hole and the cover plate riveting hole; then, placing on the riveting equipment, aligning the riveting head with the tab riveting hole and the cover plate riveting hole; then, installing the riveting piece on the riveting head, wherein the riveting piece is installed on the riveting head, one end of the riveting piece is a hole and is in the form of a thin-walled tube, the riveting head drives the riveting piece to press down, so that the end of the riveting piece contacts the bottom of the cover plate riveting hole, then the riveting head continues to press down, the end of the riveting piece is gradually expanded to form an end limiting flange; finally, after the riveting head is riveted in place, the end limiting flange is pressed tightly on the tab, and the connection of the tab and the cover plate is completed. The connection method of the electric core tab and the cover plate of the above-mentioned invention is beneficial to improving the production rhythm and the quality of the electric core, and can also reduce the equipment occupation space and the equipment investment, and has good use effect.

[0004] However, the spin rivet structure has a safety problem of insulation, and a layer of glue is attached between the pole and the aluminum plate flange to improve the insulation capacity of the electric core, avoid the short circuit of the aluminum plate and the pole, and improve the safety performance of the electric core. However, the glue is attached to the aluminum plate, and is easy to fall off due to factors such as vibration and rotation, the stability of the glue during use is poor, and the safety of the electric core is not guaranteed.

[0005] Therefore, it is necessary for us to design a reasonable electric core top cover structure to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of top cover structure of battery cell, connecting piece is set between pole and aluminium plate flanging, two protrusions of connecting piece are matched with pole and aluminium plate flanging respectively and are connected, so that connection stability is better, and pole and aluminium plate are effectively stably separated, structural strength is high, use stability is strong, and battery cell is safe and reliable.

[0007] To achieve the above object, the utility model adopts the following technical solutions to be realized:

[0008] The utility model provides a kind of top cover structure of battery cell, including aluminium plate, pole and the first connecting piece being set between the aluminium plate with pole;The aluminium plate is provided with flanging;The pole outside is provided with recess;The first connecting piece is provided with the first protrusion extending into the recess and the second protrusion extending into the flanging inside;The first connecting piece is integrally formed.

[0009] As the preferred of the utility model, the first connecting piece is provided with cladding block for cladding to the flanging outside at the end away from the first protrusion.

[0010] As the preferred of the utility model, the recess is annular groove, and the first protrusion is annular protrusion.

[0011] As the preferred of the utility model, the recess is flat edge groove, and the first protrusion is flat edge protrusion.

[0012] As the preferred of the utility model, the pole outside is provided with annular plate, and the aluminium plate is provided with limiting plate for limiting the annular plate.

[0013] As the preferred of the utility model, the second connecting piece is set between the annular plate and limiting plate.

[0014] As the preferred of the utility model, the second connecting piece is provided with the third protrusion extending to the side of annular plate away from the pole and the fourth protrusion extending to the side of limiting plate away from the aluminium plate.

[0015] As the preferred of the utility model, the second connecting piece is integrally formed insulating part.

[0016] As the preferred of the utility model, the aluminium plate is provided with lower plastic on the side away from the flanging, and the lower plastic is provided with connecting bayonet at the connecting place with the pole.

[0017] As the preferred of the utility model, the pole includes positive pole and negative pole, and the first connecting piece for being connected with the positive pole on the aluminium plate is weak conductive part, and the first connecting piece for being connected with the negative pole on the aluminium plate is insulating part.

[0018] The utility model discloses a kind of beneficial effects of top cover structure of battery core, connecting piece is set between pole and aluminium plate flanging, two protrusions of connecting piece are matched with pole and aluminium plate flanging and are connected, so that connection stability is better, and pole and aluminium plate are effectively stably separated, structural strength is high, use stability is strong, and battery core is safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a whole structure schematic view of the utility model discloses a kind of top cover structure of battery core;

[0021] Figure 2 It is Figure 1 Structure enlarged schematic view of place A in it;

[0022] Figure 3 It is Figure 2 Structure explosion schematic view in it;

[0023] Figure 4 It is structure schematic view of first connecting piece in one embodiment of the utility model discloses a kind of top cover structure of battery core;

[0024] Figure 5 It is structure schematic view of pole in one embodiment of the utility model discloses a kind of top cover structure of battery core;

[0025] Figure 6 It is structure schematic view of first connecting piece in another embodiment of the utility model discloses a kind of top cover structure of battery core;

[0026] Figure 7 It is structure schematic view of pole in another embodiment of the utility model discloses a kind of top cover structure of battery core;

[0027] In the drawing: 1, first connecting piece, 11, first protrusion, 12, second protrusion, 13, cladding block, 2, pole, 21, recess, 22, annular plate, 3, aluminium plate, 31, flanging, 32, limit plate, 33, lower plastic, 34, connecting bayonet, 35, conductive sheet. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0029] In the following description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The following description provides multiple embodiments of this application, which can be substituted or combined with each other. Therefore, this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more other possible combinations of A, B, C, and D, even if such embodiments are not explicitly described in the following text.

[0030] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the described elements without departing from the scope of this application. Various processes or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0031] Example 1: As Figures 1 to 3 As shown, this utility model provides a battery cell top cover structure, including an aluminum plate 3, a terminal post 2, and a first connector 1 disposed between the aluminum plate 3 and the terminal post 2; the aluminum plate 3 is provided with a flange 31; the outer side of the terminal post 2 is provided with a groove 21; the first connector 1 is provided with a first protrusion 11 extending into the groove 21 and a second protrusion 12 extending into the flange 31; the first connector 1 is an integrally formed part.

[0032] In this utility model, the aluminum plate 3 is the plain aluminum plate structure of the top cover. Two pole hole is provided on the aluminum plate 3 for convenient installation of the pole 2. The two pole hole are respectively connected to a positive pole and a negative pole. A pressure relief hole is also provided between the positive pole and the negative pole. The pole 2 is installed at the pole hole by riveting. The aluminum plate 3 is provided with a flange 31 at the pole hole for easier connection with the pole 2. A first connector 1 is provided between the flange 31 and the pole 2 to separate the aluminum plate from the pole to avoid short circuit and improve the insulation of the cell.

[0033] Here, the first connecting piece 1 is vertically arranged to separate the flange 31 from the pole 2, the first connecting piece 1 is provided with a first protrusion 11 on the side close to the pole 2, the first connecting piece 1 is provided with a second protrusion 12 on the side close to the flange 31, the outer side wall of the pole 2 is provided with a groove 21, the first protrusion 11 can be inserted into the groove 21, and the second protrusion 12 extends to the inner side of the flange 31 to play a role of clamping the flange 31, so that the first connecting piece 1 is not easy to be affected by factors such as vibration and rotation and fall off, and effectively separate and protect.

[0034] In addition, the first connecting piece 1 is provided with a cladding block 13 for cladding to the outer side of the flange 31 at the end away from the first protrusion 11, the cladding block 13 fully covers the outer side of the flange 31, effectively avoiding the flange 31 from being bumped and corroded.

[0035] Of course, the first connecting piece 1 is an integral molding, and in fact, the first connecting piece 1 is a rubber-coated piece with a certain elasticity, which effectively connects and separates the aluminum plate 3 and the pole 2, and the first connecting piece 1 has high structural strength and strong stability, and the safety of the battery cell is guaranteed.

[0036] Embodiment two: still as Figures 1 to 4 shown, only one embodiment of the present application, on the basis of embodiment one, in the present application, the outer side of the pole 2 is provided with an annular plate 22, the aluminum plate 3 is provided with a limiting plate 32 for limiting the annular plate 22, and the limiting plate 32 is arranged on the side of the flange 31 close to the inside of the battery; the outer diameter of the annular plate 22 is greater than the outer diameter of the pole 2, and the limiting plate 32 is also an annular plate, but the inner diameter of the limiting plate 32 is smaller than the outer diameter of the annular plate 22, so that when the annular plate 22 abuts against the limiting plate 32, the pole 2 cannot be inserted again, which effectively prevents the pole 2 from being inserted too deeply into the inside of the aluminum plate 3.

[0037] And the groove 21 on the pole 2 is just located at the connection between the pole 2 and the annular plate 22 away from the inside of the battery, so that the first protrusion 11 of the first connecting piece 1 extends into the groove 21, and the second protrusion 12 of the first connecting piece 1 away from the first protrusion 11 extends to the side of the flange 31 close to the limiting plate 32, so that the first connecting piece 1 can effectively avoid the contact between the annular plate 22 and the flange 31.

[0038] In the present application, the second connecting piece 4 is arranged between the annular plate 22 and the limiting plate 32, that is, the annular plate 22 and the limiting plate 32 also need to be separated.

[0039] Here, the second connector 4 is provided with a third protrusion 41 extending toward the side of the annular plate 22 away from the pole post 2 and a fourth protrusion 42 extending toward the side of the limiting plate 32 away from the aluminum plate 3. The third protrusion 41 effectively prevents the outer edge of the annular plate 22 from contacting the position between the upper flange 31 of the aluminum plate 3 and the limiting plate 32, while the fourth protrusion 42 effectively prevents the inner edge of the limiting plate 32 from contacting the side wall of the pole post 2.

[0040] Of course, the second connector 4 is an integrally formed insulating component, which effectively avoids direct connection between the aluminum plate 3 and the pole 2, thus preventing short circuit.

[0041] In one embodiment of this utility model, the second protrusion 12 of the first connector 1 and the third protrusion 41 of the second connector 4 can directly contact each other, effectively filling the space between the aluminum plate 3 and the pole post 2, and effectively separating the aluminum plate 3 and the pole post 2.

[0042] It is understandable that the first connector 1 is the outer side of the aluminum plate 3 and the pole post 2, which are slightly outer, and the second connector 4 is the inner side of the aluminum plate 3 and the pole post 2, which are slightly inner, together serving to effectively separate the aluminum plate 3 and the pole post 2.

[0043] Example 3: Figures 1 to 7 The illustration shown is merely one embodiment of the present invention. Based on any of the above embodiments, the groove 21 and the first protrusion 11 in the present invention have various structural designs:

[0044] For example, the groove 21 is an annular groove, and the first protrusion 11 is an annular protrusion, such as... Figure 4 , 5 As shown.

[0045] For example, the groove 21 is a flat-edged groove, and the first protrusion 11 is a flat-edged protrusion; naturally, in this case, the number of grooves 21 and the number of first protrusions 11 are both at least two, such as... Figure 6 , 7 As shown.

[0046] Example 4: Still as before Figures 1 to 7 As shown, this is only one embodiment of the present utility model. Based on any of the above embodiments, in the present utility model, the aluminum plate 3 is provided with a lower plastic 33 on the side away from the flange 31. A connecting slot 34 is provided at the connection between the lower plastic 33 and the pole post 2 for effective connection of the pole post 2. The lower plastic 33 is also an insulating part, and the fourth protrusion 42 extends directly to the connecting slot 34.

[0047] Here, after the terminal post 2 is inserted into the inner side of the aluminum plate 3, it makes contact with the conductive sheet 35 inside the battery, and the lower plastic 33 effectively separates the conductive sheet 35 from the aluminum plate 3.

[0048] In the utility model, the pole 2 includes positive pole and negative pole, the first connecting piece 1 also has two, the first connecting piece 1 for being connected with the positive pole on the aluminium plate 3 is weak conducting part, the first connecting piece 1 for being connected with the negative pole on the aluminium plate 3 is insulating part.

[0049] Weak conducting part refers to those conducting performance between conductor and insulator material, their resistivity is usually higher than conductor, but lower than insulator, weak conducting material example includes certain type ceramic, glass and plastic or mixture of at least two, so that the first connecting piece 1 at positive pole is weak conducting part, can effectively separate aluminium plate 3 and pole 2 to avoid direct conduction short circuit, and can carry out a small amount of electric charge flow, effectively avoid aluminium plate corrosion.

[0050] The utility model discloses a kind of top cover structures of battery cell, connecting piece is set between pole and aluminium plate flanging, two protrusions of connecting piece are connected with pole and aluminium plate flanging respectively, so that connection stability is better, and pole and aluminium plate are effectively and stably separated, high structural strength, strong stability in use, battery cell is safe and reliable.

[0051] In the above embodiment, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0052] The above content is further detailed description of the utility model in combination with specific preferred embodiment, and the specific embodiment of the utility model cannot be limited to these descriptions. For ordinary skilled person in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. An electrode top cap structure, characterized by: The utility model provides a battery pole and aluminum plate connecting structure, including aluminum plate (3), pole (2) and first connecting piece (1) between aluminum plate (3) with pole (2), be provided with flanging (31) on aluminum plate (3), the outside of pole (2) is provided with recess (21), first connecting piece (1) is provided with the first protruding (11) of extending to recess (21) and the second protruding (12) of extending to the inboard of flanging (31), first connecting piece (1) is integrally formed.

2. The top cover structure of an electric cell according to claim 1, characterized in that: The first connecting piece (1) is provided with a cladding block (13) on one end away from the first protruding (11) for cladding to the outside of the flanging (31).

3. The top cover structure of an electric cell according to claim 1, characterized in that: The recess (21) is an annular groove, and the first protruding (11) is an annular protrusion.

4. The top cover structure of an electric cell according to claim 1, characterized by: The recess (21) is a flat edge groove, and the first protruding (11) is a flat edge protrusion.

5. The top cover structure of an electric cell according to claim 1, characterized by: The pole (2) is provided with an annular plate (22) on the outside, and the aluminum plate (3) is provided with a limiting plate (32) for limiting the annular plate (22), the limiting plate (32) is arranged on the side of the flanging (31) close to the inside of the battery.

6. The top cover structure of an electric cell according to claim 5, wherein: A second connecting piece (4) is arranged between the annular plate (22) and the limiting plate (32).

7. The top cover structure of an electric cell according to claim 6, wherein: The second connecting piece (4) is provided with a third protruding (41) extending away from the side of the annular plate (22) away from the pole (2) and a fourth protruding (42) extending away from the side of the limiting plate (32) away from the aluminum plate (3).

8. The top cover structure of an electric cell according to claim 6, characterized by: The second connecting piece (4) is an integrally formed insulating piece.

9. The top cover structure of an electric cell according to claim 1, characterized by: The aluminum plate (3) is provided with a lower plastic (33) on the side away from the flanging (31), and the lower plastic (33) is provided with a connecting bayonet (34) at the connection with the pole (2).

10. The top cover structure of an electric cell according to claim 1, characterized by: The pole (2) includes a positive pole and a negative pole, the first connecting piece (1) for connecting with the positive pole on the aluminum plate (3) is a weak conductive piece, and the first connecting piece (1) for connecting with the negative pole on the aluminum plate (3) is an insulating piece.

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