CN220209232U

CN220209232U - Battery cell

Info

Publication number: CN220209232U
Application number: CN202321373176.2U
Authority: CN
Inventors: 陈朋
Original assignee: Zhongshan Zhenming Intelligent Technology Co ltd
Current assignee: Zhongshan Zhenming Intelligent Technology Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-12-19
Anticipated expiration: 2033-05-31

Abstract

The utility model discloses a battery, which comprises a bottom shell, a battery winding core piece and a surface shell, wherein the bottom shell is provided with a containing groove, the battery winding core piece is arranged in the containing groove, the surface shell is connected with the bottom shell to seal the notch of the containing groove, the surface shell comprises a cover plate and a conductive pole piece, the upper surface of the cover plate is provided with a first assembly groove, the bottom surface of the first assembly groove is provided with a first through hole penetrating through the upper surface and the lower surface of the cover plate, the pole piece comprises an end head part and a stand column part, the stand column part is connected with the lower end surface of the end head part, the stand column part is arranged through the first through hole, the lower end surface of the end head part is close to the bottom surface of the first assembly groove, sealant is arranged between the lower end surface of the end head part and the bottom surface of the first assembly groove, and between the outer side wall of the stand column and the inner side wall of the first through hole, and the battery winding core piece is electrically connected with the pole piece.

Description

Battery cell

Technical Field

The utility model relates to the technical field of energy storage components, in particular to a battery.

Background

The traditional battery, all be provided with the utmost point post spare that is used for being connected with battery roll core spare electricity on the face-piece, the utmost point post spare in the past passes through welding process setting on the apron of face-piece, but welding process is complicated, the cost is higher, in order to do benefit to mass production, perhaps, also have through riveting technology with utmost point post spare and apron, be provided with the through-hole that passes utmost point post spare on the apron, make utmost point post spare inflation through pressing the utmost point post spare during the riveting, the lateral wall of utmost point post spare is pressed with the inside wall of through-hole and is realized sealedly, but the sealed effect is to be improved in this technology, the product percent of pass is not high.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the battery provided by the utility model is riveted by utilizing the structure, has a good sealing effect, is easy to produce, and greatly improves the product qualification rate.

A battery according to an embodiment of the first aspect of the present utility model includes: the bottom shell is provided with a containing groove; the battery winding core piece is arranged in the accommodating groove; the battery pack comprises a shell, wherein the shell is connected with a bottom shell to seal a notch of a containing groove, the shell comprises a cover plate and a conductive pole piece, a first assembly groove is formed in the upper surface of the cover plate, a first through hole penetrating through the upper surface and the lower surface of the cover plate is formed in the bottom surface of the first assembly groove, the pole piece comprises an end head portion and a column portion, the column portion is connected with the lower end face of the end head portion, the column portion penetrates through the first through hole, the lower end face of the end head portion is close to the bottom surface of the first assembly groove, sealant is arranged between the lower end face of the end head portion and the bottom surface of the first assembly groove and between the outer side wall of the column and the inner side wall of the first through hole, and the battery pack core piece is electrically connected with the pole piece, wherein the pole piece is riveted to enable the pole piece to be in close fit with the cover plate.

The battery provided by the embodiment of the utility model has at least the following beneficial effects:

according to the battery disclosed by the utility model, when the battery is produced and manufactured, the sealing glue can be coated on the first assembly groove and the inner wall of the first through hole, the upright post part of the pole piece is penetrated in the first through hole, the end part enters the first assembly groove, the lower end face of the end part is close to the bottom face of the first assembly groove, the pole piece is pressed and riveted, the lower end face of the end part is pressed and tightly pressed on the bottom face of the first assembly groove, the upright post part expands, the outer side wall of the upright post part is tightly matched with the inner side wall of the first through hole, the sealing glue is matched and packaged between the lower end face of the end part and the bottom face of the first assembly groove and between the outer side wall of the upright post and the inner side wall of the first through hole, the sealing effect is good, the design is easy to produce, and the product qualification rate is greatly improved.

According to some embodiments of the utility model, the outer sidewall of the head portion is proximate to the inner sidewall of the first fitting groove, and a portion of the sealant is disposed between the outer sidewall of the head portion and the inner sidewall of the first fitting groove.

According to some embodiments of the utility model, the face shell further comprises a pressing piece, the pressing piece is provided with a second through hole, the lower surface of the cover plate is provided with a second assembly groove, one end of the first through hole is communicated with the second assembly groove, the pressing piece is arranged in the second assembly groove, the first through hole can be opposite to the second through hole, the column part is arranged in the first through hole and the second through hole in a penetrating mode, the upper end face of the pressing piece is close to the bottom face of the second assembly groove, the outer side wall of the pressing piece is close to the inner side wall of the second assembly groove, part of the sealant is arranged between the upper end face of the pressing piece and the bottom face of the second assembly groove, and part of the sealant is further arranged between the outer side wall of the pressing piece and the inner side wall of the second assembly groove and is riveted with the pole part so that the pole part can be tightly matched with the cover plate and the pressing piece.

According to some embodiments of the utility model, the tab is in conductive contact with the pillar portion, the bottom case is conductive, one tab of the battery winding core is electrically connected with the tab, and the other tab of the battery winding core is electrically connected with the bottom case.

According to some embodiments of the utility model, the bottom case is electrically conductive, one tab of the battery winding core piece is electrically connected with the column part, and the other tab of the battery winding core piece is electrically connected with the bottom case.

According to some embodiments of the utility model, the pole piece is provided with a filling opening through the upper and lower surfaces, the pole piece being provided with a sealing sphere at the filling opening.

According to some embodiments of the utility model, the sealant is an insulating material.

According to some embodiments of the utility model, a concave ring is circumferentially arranged on the edge of the lower surface of the cover plate, the top end of the side wall of the bottom shell is inserted into the concave ring so that the bottom shell is sleeved on the cover plate, and the bottom shell is welded with the cover plate to seal the notch of the accommodating groove.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic cross-sectional view of one embodiment of a battery of the present utility model;

FIG. 2 is a schematic cross-sectional view of a face cover;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is a schematic view of the assembly of the face cover.

Reference numerals:

a bottom case 100; the accommodating groove 110; battery winding core 200; a face-piece 300; a cover plate 310; a first fitting groove 311; a first through hole 312; a second fitting groove 313; a female ring 314; a pole piece 320; a head 321; a column portion 322; a liquid injection port 323; a seal sphere 324; tabletting 330; a second through hole 331; and a sealant 400.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, a battery according to an embodiment of the first aspect of the present utility model includes a bottom case 100, a battery winding core member 200, and a face case 300, the bottom case 100 is provided with a receiving groove 110, the battery winding core member 200 is disposed in the receiving groove 110, the face case 300 is connected with the bottom case 100 to close a notch of the receiving groove 110, the face case 300 includes a cover plate 310 and a conductive post member 320, a first assembly groove 311 is provided on an upper surface of the cover plate 310, a first through hole 312 penetrating an upper surface and a lower surface of the cover plate 310 is provided on a bottom surface of the first assembly groove 311 by the cover plate 310, the post member 320 includes a terminal portion 321 and a post portion 322, the post portion 322 is connected with a lower end surface of the terminal portion 321, the post portion 322 is penetrated in the first through hole 312, a lower end surface of the terminal portion 321 is close to a bottom surface of the first assembly groove 311, a sealant 400 is disposed between a lower end surface of the terminal portion 321 and a bottom surface of the first assembly groove 311, and between an outer side wall of the post and an inner side wall of the first through hole 312, and the battery winding core member 200 is electrically connected with the post member 320, wherein the post member 320 is capable of being tightly coupled with the cover plate 310.

The battery is generally circular, so the bottom case 100 and the face case 300 may be configured into a circular shape, and the battery winding core 200 includes a positive plate, a negative plate and an insulating film, where the positive plate, the insulating film and the negative plate are stacked and wound to form the battery winding core 200, which is not described herein, and after the battery winding core 200 is placed in the accommodating groove 110, the staff still needs to fill the accommodating groove 110 with the electrolyte.

In the battery of the utility model, when in production and manufacture, staff can coat sealant 400 on the inner walls of the first assembly groove 311 and the first through hole 312, pass the column part 322 of the pole piece 320 through the first through hole 312, and the end part 321 enters the first assembly groove 311, the lower end surface of the end part 321 is close to the bottom surface of the first assembly groove 311, then the pole piece 320 is pressed and riveted, the pole piece 320 is pressed, the lower end surface of the end part 321 is tightly pressed on the bottom surface of the first assembly groove 311, the column part 322 is expanded, the outer side wall of the column part 322 is tightly pressed and matched with the inner side wall of the first through hole 312, and the sealant 400 is matched and packaged between the lower end surface of the end part 321 and the bottom surface of the first assembly groove 311 and between the outer side wall of the column and the inner side wall of the first through hole 312.

In some embodiments of the present utility model, as shown in fig. 3, an outer sidewall of the end portion 321 is adjacent to an inner sidewall of the first fitting groove 311, and a portion of the sealant 400 is disposed between the outer sidewall of the end portion 321 and the inner sidewall of the first fitting groove 311.

The shape of the end portion 321 may be adapted to the shape of the first fitting groove 311, for example, a circular shape, an oval shape, or a rectangular shape, etc., where the outer sidewall of the end portion 321 is close to the inner sidewall of the first fitting groove 311 and is provided with the sealant 400, and when the pole piece 320 is riveted and forced, the end portion 321 also collides, so that the outer sidewall of the end portion 321 is tightly press-fitted with the inner sidewall of the first fitting groove 311, thereby improving the sealing performance.

In some embodiments of the present utility model, as shown in fig. 3 and 4, the face case 300 further includes a pressing piece 330, the pressing piece 330 is provided with a second through hole 331, the lower surface of the cover plate 310 is provided with a second fitting groove 313, one end of the first through hole 312 is communicated with the second fitting groove 313, and the pressing piece 330 is provided in the second fitting groove 313, the first through hole 312 can be opposite to the second through hole 331, the pillar portion 322 is penetrated into the first through hole 312 and the second through hole 331, the upper end surface of the pressing piece 330 is close to the bottom surface of the second fitting groove 313, the outer side wall of the pressing piece 330 is close to the inner side wall of the second fitting groove 313, a part of sealant 400 is provided between the upper end surface of the pressing piece 330 and the bottom surface of the second fitting groove 313, and a part of sealant 400 is further provided between the outer side wall of the pressing piece 330 and the inner side wall of the second fitting groove 313, and the pole piece 320 is riveted to enable the pole piece 320 to be tightly fitted with the cover plate 310 and 330.

The column part 322 of the pole piece 320 penetrates into the first through hole 312 from the upper surface of the cover plate 310, the pressing piece 330 is sleeved on the column part 322 from the lower surface of the cover plate 310 through the second through hole 331, the installation is convenient, the operation is easy, when the pole piece 320 is riveted and applied, the column part 322 expands, the outer side wall of the column part 322 presses the inner side wall of the pressing piece 330, the outer side wall of the pressing piece 330 also presses the inner side wall of the second assembly groove 313, the pressing piece 330 is fastened in the second assembly groove 313, and the sealing performance is improved by matching with the sealant 400.

In some embodiments of the present utility model, the sealant 400 is an insulating material, so that the terminal member 320 and the pressing piece 330 can be insulated from the bottom case 100.

Specifically, the bottom shell 100 and the surface cover may be made of stainless steel, aluminum alloy, or other metals or alloys, the pole piece 320 may be made of aluminum, aluminum alloy, or other metals or alloys, the sealant 400 may be made of PFA, PP, or other sealing insulating materials, and the pressing piece 330 may be made of aluminum, aluminum alloy, or other metals or alloys.

In some embodiments of the present utility model, the tab 330 is in conductive contact with the post 322, the bottom case 100 is conductive, one tab of the battery pack 200 is electrically connected to the tab 330, and the other tab of the battery pack 200 is electrically connected to the bottom case 100.

The pressing sheet 330 and the inner wall of the bottom case 100 have a larger contact area, so that the conductive pressing sheet 330 and the bottom case 100 can be respectively electrically connected with the two tabs of the battery winding core member 200, thereby reducing the internal resistance of the battery and improving the power output efficiency.

In some embodiments of the present utility model, the bottom case 100 may be electrically conductive, one tab of the battery core 200 is electrically connected to the pillar portion 322, and the other tab of the battery core 200 is electrically connected to the bottom case 100.

One tab of the battery winding core 200 extends to the position of the column part 322 through the conductive sheet to be in contact with the column part 322 for conduction.

In some embodiments of the present utility model, the pole piece 320 is provided with a liquid injection hole 323 penetrating through the upper and lower surfaces, the pole piece 320 is provided with a sealing sphere 324 at the liquid injection hole 323, the electrolyte can be injected into the accommodating groove 110 from the liquid injection hole 323 after the face shell 300 is connected with the bottom shell 100, and finally the liquid injection hole 323 is blocked by the sealing sphere 324 for packaging, so that the process is simple, and the production efficiency and the product yield are high.

In some embodiments of the present utility model, a concave ring 314 is circumferentially formed on the lower surface edge of the cover plate 310, the top end of the side wall of the bottom shell 100 is inserted into the concave ring 314, so that the bottom shell 100 is sleeved on the cover plate 310, and the bottom shell 100 and the cover plate 310 are welded to close the notch of the accommodating groove 110.

The concave ring 314 on the lower surface of the cover plate 310 can enable the bottom shell 100 to be sleeved on the cover plate 310 more easily, positioning is achieved, then the cover plate 310 is connected with the bottom shell 100 by laser welding, and therefore production efficiency is improved, qualification rate is high, and mass production is easy.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, comprising:

the bottom shell is provided with a containing groove;

the battery winding core piece is arranged in the accommodating groove;

the battery pack comprises a shell, wherein the shell is connected with a bottom shell to seal a notch of a containing groove, the shell comprises a cover plate and a conductive pole piece, a first assembly groove is formed in the upper surface of the cover plate, a first through hole penetrating through the upper surface and the lower surface of the cover plate is formed in the bottom surface of the first assembly groove, the pole piece comprises an end head portion and a column portion, the column portion is connected with the lower end face of the end head portion, the column portion penetrates through the first through hole, the lower end face of the end head portion is close to the bottom surface of the first assembly groove, sealant is arranged between the lower end face of the end head portion and the bottom surface of the first assembly groove and between the outer side wall of the column and the inner side wall of the first through hole, and the battery pack core piece is electrically connected with the pole piece, wherein the pole piece is riveted to enable the pole piece to be in close fit with the cover plate.

2. A battery according to claim 1, wherein: the outer side wall of the end part is close to the inner side wall of the first assembly groove, and part of the sealant is arranged between the outer side wall of the end part and the inner side wall of the first assembly groove.

3. A battery according to claim 1, wherein: the face-piece still includes the preforming, the preforming is provided with the second through-hole, the lower surface of apron is provided with the second assembly groove, the one end of first through-hole with the second assembly groove communicates, and the preforming sets up in the second assembly groove, first through-hole can with the second through-hole is just right, stand portion wears to locate first through-hole with in the second through-hole, the up end of preforming with the bottom surface of second assembly groove is pressed close to, the lateral wall of preforming with the inside wall of second assembly groove is pressed close to, part the sealant sets up the up end of preforming with between the bottom surface of second assembly groove, part the sealant still sets up between the lateral wall of preforming with the inside wall of second assembly groove, to the pole piece riveting so that pole piece with apron and preforming close to each other.

4. A battery according to claim 3, wherein: the pressing piece is in conductive contact with the upright post part, the bottom shell is conductive, one lug of the battery winding core piece is electrically connected with the pressing piece, and the other lug of the battery winding core piece is electrically connected with the bottom shell.

5. A battery according to claim 1, wherein: the bottom shell is conductive, one lug of the battery winding core piece is electrically connected with the upright post part, and the other lug of the battery winding core piece is electrically connected with the bottom shell.

6. A battery according to claim 1, wherein: the pole piece is provided with a liquid injection port penetrating through the upper surface and the lower surface, and a sealing sphere is arranged at the liquid injection port.

7. A battery according to claim 1, wherein: the sealant is an insulating material.

8. A battery according to claim 1, wherein: the bottom shell is sleeved on the cover plate, and the bottom shell is welded with the cover plate to seal the notch of the accommodating groove.