Battery cell

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery monomer. The single battery comprises a battery cell, a shell, a pole and a magnetic part, a tab is arranged at the end part of the battery cell, and the battery cell is positioned in the shell. At least part of the pole is arranged in the shell in a penetrating manner; one side, close to the battery core, of the pole is opposite to the tab. And the magnetic piece is positioned in the shell and is connected with the tab and the pole in a magnetic attraction manner. The connection strength of the tabs and the poles of the battery monomer is high, so that the safety performance of the battery monomer is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery monomer. BACKGROUND

[0002] At present, lithium ion battery technology matures increasingly, and lithium ion battery is widely used in electric vehicles and energy storage fields as power battery, therefore, the use performance and safety of lithium ion battery are increasingly required. The pole is the component of the inside and outside of lithium ion battery, one end of the pole extends to the outside of the battery shell, the other end is connected with the pole lug of the internal core of the battery shell, thereby realizing the function of charge and discharge.

[0003] The common connection mode of the pole lug and the pole in the prior art battery structure is laser welding or ultrasonic welding, but both connection modes need sufficient field of vision to use, and the structure occupies large space.

[0004] Therefore, it is urgent to provide a battery monomer to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a battery monomer, the pole lug and the pole of the battery monomer are high in connection strength and simple in connection, and the safety performance of the battery monomer is high.

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

[0007] The battery monomer comprises:

[0008] The electric core is provided with a pole lug at the end;

[0009] The shell is provided with an electric core;

[0010] The pole is at least partially arranged in the shell, and the side of the pole close to the electric core is opposite to the pole lug;

[0011] The magnetic part is arranged in the shell and magnetically connected with the pole lug and the pole.

[0012] As an optional technical scheme of the battery monomer, the magnetic part is a magnetic block, the magnetic block is arranged on the side of the pole close to the electric core, and the magnetic block is coaxially arranged with the pole.

[0013] As an optional technical scheme of the battery monomer, the magnetic block is wrapped around the pole lug, and the magnetic block magnetically presses at least part of the pole lug to the pole.

[0014] As an optional technical scheme of the battery monomer, the pole lug is provided with a bulge, the bulge protrudes towards the direction of the pole, and the magnetic block is arranged in the bulge.

[0015] As an optional technical solution of the battery monomer, the pole post is provided with an inverted groove near the tab side, the shape of the inverted groove is matched with the shape of the bulge, and the bulge is clamped in the inverted groove.

[0016] As an optional technical solution of the battery monomer, the pole post comprises a base plate and a post body, the post body is arranged in the shell, and the base plate abuts against the inner wall of the shell.

[0017] As an optional technical solution of the battery monomer, the battery monomer further comprises a lower plastic, the lower plastic is located in the shell, the post body is sequentially arranged in the lower plastic and the shell, and the base plate abuts against the lower plastic near the battery cell side.

[0018] As an optional technical solution of the battery monomer, the battery monomer further comprises an aluminum block, the aluminum block is located outside the shell, and the aluminum block is sleeved and riveted on the post body.

[0019] As an optional technical solution of the battery monomer, the battery monomer further comprises a rubber coating, the rubber coating is arranged on the side wall of the aluminum block and the side close to the shell.

[0020] As an optional technical solution of the battery monomer, the battery monomer further comprises a sealing ring, the sealing ring is sleeved on the post body to isolate the pole post and the shell.

[0021] The battery monomer provided by the utility model has the advantages of the following beneficial effects:

[0022] The battery monomer provided by the utility model comprises a battery cell, a shell, a pole post and a magnetic part. The battery cell is located in the shell and can be protected by the shell. The battery cell is provided with a tab at the end, at least part of the pole post is arranged in the shell and is opposite to the tab near the battery cell, so as to facilitate the connection with the tab. The magnetic part is located in the shell and is magnetically connected with the tab and the pole post, the connection strength is high, and the safety performance of the battery monomer is high. In actual production, the battery cell is arranged in the shell, the tab is guided to be close to the pole post by the electromagnet outside the shell, and finally the tab and the pole post are magnetically attracted and connected. Compared with the welding connection between the tab and the pole post in the prior art, the tab and the pole post of the battery monomer are magnetically connected, and the connection is simple and convenient. DRAWINGS

[0023] Figure 1 is a sectional view of the battery monomer provided by the utility model embodiment;

[0024] Figure 2 is a structural schematic view of the pole post of the battery monomer provided by the utility model embodiment;

[0025] Figure 3Is the structural schematic diagram of the battery monomer's electric core provided by the embodiment of the utility model;

[0026] Figure 4 Is Figure 3 The enlarged view at A.

[0027] In the figure:

[0028] 100, electric core;110, tab;111, bulge;200, shell;300, pole;310, base plate;311, reverse buckle groove;320, column body;400, magnetic piece;500, lower plastic;600, aluminum block;700, glue package;800, sealing ring. Specific implementation

[0029] The utility model will be further explained in detail below in combination with the drawings and embodiments.It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model.In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0030] 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 mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate media, or 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.

[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include the direct contact of the first and second features, or the indirect contact of the first and second features through other features 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] The battery cell provided in this embodiment has a high connection strength between the tab and the terminal, thus the battery cell has high safety performance.

[0034] Specifically, such as Figures 1 to 4 As shown, the battery cell includes a cell 100, a housing 200, terminals 300, and a magnetic component 400. The cell 100 has a tab 110 at one end and is located within the housing 200. At least a portion of the terminal 300 is inserted into the housing 200, with the side of the terminal 300 closest to the cell 100 directly opposite the tab 110. The magnetic component 400 is located within the housing 200 and magnetically connects the tab 110 and the terminal 300.

[0035] Based on the above design, the battery cell 100 is located inside the housing 200 and is protected by the housing 200. The battery cell 100 has a tab 110 at its end, and at least a portion of the terminal post 300 is inserted into the housing 200, with the side closest to the battery cell 100 directly opposite the tab 110 for easy connection. A magnetic component 400 is located inside the housing 200 and magnetically connects the tab 110 and the terminal post 300, providing a high connection strength and thus ensuring high safety performance of the battery cell. In actual production, the battery cell 100 is installed in the housing 200, and an electromagnet outside the housing 200 guides the tab 110 and the terminal post 300 closer together, ultimately causing them to magnetically attract each other. Compared to the existing technology where welding the tab 110 to the terminal post 300 requires sufficient field of vision, the magnetic connection of the tab 110 and terminal post 300 in this battery cell is simple and convenient.

[0036] It should be noted that the battery cell 100 is installed into the housing 200 from the side opposite to the terminal post 300.

[0037] Furthermore, the magnetic component 400 is a magnetic block, which is located on the side of the pole post 300 near the cell 100, and is coaxially arranged with the pole post 300. The connection between the magnetic block and the tab 110 and the pole post 300 is simple, and the magnetic block is low in cost; the coaxial arrangement of the magnetic block and the pole post 300 improves the uniformity of force at the connection between the pole post 300 and the tab 110.

[0038] Optionally, the magnetic block is wrapped around the tab 110, and the magnetic block magnetically presses at least part of the tab 110 against the pole 300. The magnetic block is wrapped around the tab 110, on one hand, the magnetic block is fixed by the tab 110, and the connection strength between the magnetic block and the tab 110 is increased, on the other hand, the tab 110 can be magnetically pressed against the pole 300, and the connection strength between the pole 300 and the tab 110 is increased.

[0039] Further, the tab 110 is provided with a bulge 111, the bulge 111 protrudes towards the pole 300, and the magnetic block is located in the bulge 111, which reduces the distance between the magnetic block and the pole 300, and improves the magnetic attraction of the magnetic block to the pole 300.

[0040] Further, in order to save the internal structure space of the battery monomer, the pole 300 is provided with a reverse buckle groove 311 close to one side of the tab 110, the shape of the reverse buckle groove 311 is matched with the shape of the bulge 111, and the bulge 111 is clamped in the reverse buckle groove 311. At the same time, the bulge 111 clamped in the reverse buckle groove 311 increases the contact area between the bulge 111 and the pole 300, which not only fixes the tab 110 and the magnetic block, but also increases the connection strength of the tab 110, the magnetic block and the pole 300.

[0041] Continuing as shown in Figure 2 , the pole 300 includes a bottom plate 310 and a column body 320, the column body 320 is arranged in the shell 200, and the bottom plate 310 abuts against the inner wall of the shell 200.

[0042] Continuing as shown in Figure 1 , the battery monomer further includes a lower plastic 500, the lower plastic 500 is located in the shell 200, the column body 320 is arranged in the lower plastic 500 and the shell 200 in sequence, the bottom plate 310 abuts against one side of the lower plastic 500 close to the battery cell 100, and the lower plastic 500 is used for insulating and isolating the bottom plate 310 of the pole 300 and the shell 200.

[0043] The battery monomer further includes an aluminum block 600, the aluminum block 600 is located outside the shell 200, the aluminum block 600 is sleeved and riveted on the column body 320, and the aluminum block 600 is riveted with the column body 320, so that the connection is simple and the connection strength is high.

[0044] Further, the battery monomer further includes a rubber coating 700, the rubber coating 700 is wrapped on the side wall of the aluminum block 600 and the side close to the shell 200, so as to insulate and isolate the aluminum block 600 and the shell 200, and protect the aluminum block 600.

[0045] The battery monomer further includes a sealing ring 800, the sealing ring 800 is sleeved on the column body 320 to isolate the pole 300 and the shell 200.

[0046] It should be noted that the pole 300 of the battery cell includes a positive pole and a negative pole, and is arranged at intervals along the length direction of the shell 200; the end of the battery cell 100 is provided with two groups of tabs 110, and the two groups of tabs 110 correspond to the positive pole and the negative pole respectively; and the battery cell includes two magnetic members 400, and the two magnetic members 400 correspond to the two groups of tabs 110 respectively.

[0047] In the embodiment, the connection modes of the positive pole and the negative pole and the corresponding tabs 110 (magnetic members 400) are the same, and details are not repeated here. In other embodiments, the connection modes of the positive pole and the negative pole and the corresponding tabs 110 (magnetic members 400) can also be different, and can be set according to the use requirement.

[0048] Further, the battery cell also includes two aluminum blocks 600, two sealing rings 800 and two rubber sleeves 700. In the embodiment, the structures and assembly modes of the positive pole and the negative pole are the same, and details are not repeated here. In other embodiments, the structures and assembly modes of the positive pole and the negative pole can also be different, and can be set according to the use requirement.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A single battery cell, characterized in that, include: A battery cell (100), wherein the battery cell (100) is provided with tabs (110) at its end; A housing (200) is provided, and the battery cell (100) is located within the housing (200). A terminal post (300), at least a portion of which is disposed within the housing (200), the side of the terminal post (300) closest to the cell (100) being directly opposite the tab (110); A magnetic component (400) is located inside the housing (200) and magnetically connects the tab (110) and the pole post (300).

2. The battery cell according to claim 1, characterized in that, The magnetic component (400) is a magnetic block, which is located on the side of the pole post (300) near the battery cell (100), and the magnetic block is coaxially arranged with the pole post (300).

3. The battery cell according to claim 2, characterized in that, The magnetic block wraps around the tab (110), and the magnetic block magnetically presses at least a portion of the tab (110) onto the pole post (300).

4. The battery cell according to claim 3, characterized in that, The tab (110) is provided with a bulge (111), the bulge (111) protrudes toward the pole post (300), and the magnet is located inside the bulge (111).

5. The battery cell according to claim 4, characterized in that, The pole post (300) has an inverted groove (311) on the side near the pole tab (110). The shape of the inverted groove (311) is adapted to the shape of the bulge (111), and the bulge (111) is engaged in the inverted groove (311).

6. The battery cell according to claim 1, characterized in that, The pole post (300) includes a chassis (310) and a column (320), the column (320) passing through the housing (200), and the chassis (310) abutting against the inner wall of the housing (200).

7. The battery cell according to claim 6, characterized in that, The battery cell also includes a lower plastic (500) located inside the housing (200). The column (320) passes through and connects the lower plastic (500) and the housing (200) in sequence. The chassis (310) abuts against the side of the lower plastic (500) near the cell (100).

8. The battery cell according to claim 6, characterized in that, The battery cell also includes an aluminum block (600), which is located outside the housing (200) and is fitted and riveted to the column (320).

9. The battery cell according to claim 8, characterized in that, The battery cell also includes a coating (700), which covers the sidewall of the aluminum block (600) and the side near the housing (200).

10. The battery cell according to claim 6, characterized in that, The battery cell also includes a sealing ring (800), which is fitted onto the post (320) to isolate the terminal post (300) from the housing (200).

Images