CN217214900U

CN217214900U - Battery bottom ring attached to cover top of negative electrode cover

Info

Publication number: CN217214900U
Application number: CN202220570395.9U
Authority: CN
Inventors: 刘荣海; 薛祥峰; 蔡鑫; 张志明; 白青钰
Original assignee: Fujian Nanping Nanfu Battery Co Ltd
Current assignee: Fujian Nanping Nanfu Battery Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-08-16
Anticipated expiration: 2032-03-16

Abstract

The utility model provides a battery foundation ring with laminating of negative pole lid top, including the foundation ring body seted up a centre bore along its central axis on the foundation ring body, the lower extreme of centre bore inserts the end for the negative pole lid, the upper end of foundation ring body upwards extends along its circumference and is formed with the section of extending, go up the section of extending to the side of the center of foundation ring body is extended out insulating negative pole lid top overlapping piece, go up the section of extending with negative pole lid top overlapping piece constitutes negative pole together and covers border cladding portion, the negative pole covers and has seted up the through-hole in the border cladding portion. The utility model discloses a battery foundation ring can solve the battery reversal problem; meanwhile, the flexibility of the coating part at the upper edge of the negative electrode cover can be improved, and the negative electrode cover is prevented from being broken.

Description

Battery bottom ring attached to cover top of negative electrode cover

Technical Field

The utility model relates to a battery part field especially relates to a battery foundation ring with laminating of negative pole lid caping.

Background

The commonly used batteries of the internet of things equipment comprise an alkaline manganese battery, a nickel-cadmium battery, a lithium ion battery and the like, and a positive terminal and a negative cover are respectively assembled at two ends of a positive steel shell. In some types of batteries, an annular battery groove is formed between the peripheral wall of the negative cover and the positive steel shell after sealing, and an insulating battery bottom ring is embedded in the battery groove in order to prevent dirt from entering the battery groove to cause slow short circuit of the battery.

The highest level position of the prior battery bottom ring is usually not higher than the top of the negative cover. When a user installs a battery, the positive and negative electrodes of the battery in the battery compartment are connected reversely (for example, the negative electrode covers of two batteries are in butt joint) due to negligence, even if the battery is placed in the storage box, once the positive and negative electrodes of one of the batteries connected in sequence are connected reversely, when the batteries form a battery loop, the reversely connected batteries generate charging current, self-discharge hydrogen evolution reaction in the batteries is intensified, so that the air pressure in the batteries is increased, further electrolyte flows out, the electrolyte can corrode a battery frame of an electric appliance or even flow onto a circuit board to further corrode the circuit board, so that the electric appliance is damaged, and the health of a human body is threatened.

In order to prevent the reverse connection of the batteries, the conventional solution is to modify a reverse connection protection circuit of a circuit of the battery compartment, but the solution is only suitable for the situation that users eliminate old battery compartment equipment. The problem of reverse connection of the battery can be fundamentally solved only by improving the battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery bottom ring attached to the cover top of a negative electrode cover, which can solve the problem of reverse connection of batteries; meanwhile, the flexibility of the coating part at the upper edge of the negative electrode cover can be improved, and the negative electrode cover is prevented from being broken.

The utility model provides a battery foundation ring with laminating of negative pole lid top, includes the foundation ring body seted up a centre bore along its central axis on the foundation ring body, the lower extreme of centre bore inserts the end for the negative pole lid, the upper end of foundation ring body upwards extends along its circumference and is formed with the extension section, go up the extension section to the central side of foundation ring body is extended insulating negative pole lid top overlapping piece, go up the extension section with negative pole lid top overlapping piece constitutes negative pole lid border cladding portion together, the through-hole has been seted up on the negative pole lid border cladding portion.

Because the upper end of the bottom ring body of the utility model extends upwards along the circumferential direction to form an upper extension section, and the upper extension section extends out of an insulated negative pole cover top lap joint sheet towards the central side of the bottom ring body again, when the negative pole cover is inserted into the position of the negative pole cover top lap joint sheet, the negative pole cover top lap joint sheet can be lapped on the outer surface of the cover top of the negative pole cover; and, go up the extension with negative pole lid top of the lid overlap joint piece constitutes negative pole and covers along cladding portion together, set up the through-hole on the negative pole covers along cladding portion, eliminate certain internal stress, improve the pliability that negative pole covered along cladding portion, avoid its fracture.

The upper extension section is of an annular structure arranged around the bottom ring body, and the cathode cover top overlapping plate is an annular overlapping plate arranged along the inner circumference of the upper extension section.

The number of the through holes is more than or equal to 2, and the through holes are uniformly arranged on the coating part at the upper edge of the negative electrode cover. In a specific implementation process, the through holes can be circular holes, or irregular holes and the like.

Preferably, the upper extension section, the negative cover top overlapping piece and the bottom ring body are of an integrally formed structure.

In a specific implementation process, a negative electrode cover is coaxially inserted and fixed in the central hole of the bottom ring body, the negative electrode cover comprises a cover top and a peripheral wall, and the lower surface of the overlapping piece of the cover top of the negative electrode cover is pressed against the upper surface of the cover top of the negative electrode cover. In addition, the outer side of the peripheral wall of the negative electrode cover is coaxially sleeved with a positive electrode shell, an annular groove is formed between the peripheral wall of the negative electrode cover and the inner side surface of the positive electrode shell, and the lower edge of the bottom ring body is inserted into the annular groove.

Preferably, the bottom ring body is extended outwards along the radial direction of the outer periphery of the bottom ring body to form a positive shell overlapping piece.

Drawings

Fig. 1 is a schematic top view of the cell bottom ring attached to the top of the negative cap of example 1;

fig. 2 is a schematic top view of the cell bottom ring attached to the top of the negative cap of example 2;

fig. 3 is a schematic longitudinal sectional structural view of the battery bottom ring attached to the top of the negative electrode cap of example 1 or example 2;

fig. 4 is a schematic diagram of the longitudinal cross-sectional structure of the battery bottom ring attached to the top of the negative cap of example 3;

fig. 5 is a schematic view of an assembly structure of the battery bottom ring, the negative electrode cover and the positive electrode can in any one of embodiments 1 to 3;

wherein, the dashed line frames in fig. 1 and fig. 2 are the inner contour lines of the foundation ring body.

Detailed Description

The following describes in detail a specific embodiment of the battery bottom ring attached to the top of the negative cover according to the present invention with reference to the accompanying drawings:

example 1

With reference to fig. 1 and 3, a battery bottom ring attached to a cathode cover top includes a bottom ring body 10, a central hole 100 is provided on the bottom ring body 10 along a central axis thereof, a lower end of the central hole 100 is a cathode cover insertion end 101, an upper end of the bottom ring body 10 is formed with an upper extension section 11 along a circumferential direction thereof in an upward extending manner, the upper extension section 11 extends to a central side of the bottom ring body 10 to form an insulated cathode cover top overlapping piece 12, the upper extension section 11 and the cathode cover top overlapping piece 12 form a cathode cover upper edge coating portion 20 together, only a plurality of through holes 200 are provided on the cathode cover top overlapping piece 12, and the through holes 200 are oval holes.

Example 2

With reference to fig. 2 and 3, the battery bottom ring attached to the top of the negative electrode cap of example 2 is different from that of example 1 in that: the through-hole 200 is a circular hole.

Example 3

As shown in fig. 4, the battery bottom ring attached to the top of the negative electrode cap of example 3 is different from that of example 2 in that: the upper extension section 11 is also provided with a plurality of through holes 200.

In the process of assembling the battery, as shown in fig. 5, when the negative electrode cover 30 is inserted into the position of the negative electrode cover top overlapping tab 12, the negative electrode cover top overlapping tab 12 overlaps the outer surface of the cover top 31 of the negative electrode cover 30, and the negative electrode cover top 31 of the battery is the negative electrode of the battery, so that the phenomenon that the positive electrode and the negative electrode of the battery are reversely connected due to the fact that the cover top 31 of the negative electrode cover of one battery is in full-face contact butt joint with the cover top 31 of the negative electrode cover of another battery is avoided; and, go up the extending section 11 with negative pole lid top of the body overlap strap 12 constitutes negative pole lid border cladding portion 20 together, through-hole 200 has been seted up on negative pole lid border cladding portion 20, eliminates certain internal stress, improves the pliability of negative pole lid border cladding portion, avoids its fracture.

It should be noted that, the through hole 200 of the present invention may be only opened on the upper extension 11, or only opened on the negative cover top overlapping plate 12, or may span the upper extension 11 and the negative cover top overlapping plate 12. In addition, the shape of the through hole 200 is not limited to the circular shape and the elliptical shape in the drawings, and may be a polygonal hole or a special-shaped hole such as a trapezoidal hole. The number of the through holes 200 is not limited, and may be 1, 2 or more.

Preferably, the upper extension 11 is a ring-shaped structure disposed around the base ring body 10, and the negative cap top tab 12 is a ring-shaped tab disposed along an inner circumference of the upper extension 11 thereof.

Preferably, the upper extension 11, the negative cover top overlapping plate 12 and the bottom ring body 10 are of an integrally formed structure.

In a specific implementation, as shown in fig. 5, the negative electrode cover 30 is coaxially inserted and fixed in the central hole 100 of the base ring body 10, the negative electrode cover 30 includes a cover top 31 and a peripheral wall 32, and a lower surface of the negative electrode cover top strap 20 is pressed against an upper surface of the cover top 31 of the negative electrode cover 30. In addition, as shown in fig. 5, a positive electrode casing 40 is coaxially sleeved outside the peripheral wall 32 of the negative electrode cover 30, an annular groove is formed between the peripheral wall 32 of the negative electrode cover 30 and the positive electrode casing 40, and the lower edge of the base ring body 10 is inserted into the annular groove.

As shown in fig. 1 to 5, the base ring body 10 is extended with a positive electrode can overlapping piece 60 along the outer circumference thereof. In the packaging link of the battery, after the battery bottom ring is assembled, a layer of packaging film is wrapped outside the battery, and the positive electrode shell overlapping sheet 60 is wrapped by the packaging film so as to compress and fix the battery bottom ring.

The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a battery foundation ring with laminating of negative pole lid capping, includes the foundation ring body a centre bore has been seted up along its central axis on the foundation ring body, the lower extreme of centre bore inserts the end for the negative pole lid, its characterized in that: the upper end of the bottom ring body upwards extends along the circumferential direction of the bottom ring body to form an upper extension section, the upper extension section extends towards the center side of the bottom ring body to form an insulated negative cover top overlapping sheet, the upper extension section and the negative cover top overlapping sheet form an upper edge coating part of the negative cover together, and a through hole is formed in the upper edge coating part of the negative cover.

2. The battery bezel of claim 1, attached to a negative cap top, wherein: the upper extension section is of an annular structure arranged around the bottom ring body, and the cathode cover top overlapping plate is an annular overlapping plate arranged along the inner circumference of the upper extension section.

3. The battery bezel of claim 1, attached to a negative cap top, wherein: the number of the through holes is more than or equal to 2, and the through holes are uniformly arranged on the coating part at the upper edge of the negative electrode cover.

4. The battery bezel of claim 1, attached to a negative cap top, wherein: the through holes are circular holes or special-shaped holes.

5. The battery bezel of claim 1, attached to a negative cap top, wherein: the upper extension section, the cathode cover top lap joint sheet and the bottom ring body are of an integrally formed structure.

6. The battery bezel of claim 1, attached to a negative cap top, wherein: the cathode cover is coaxially inserted into the central hole of the bottom ring body and fixed in the central hole, the cathode cover comprises a cover top and a peripheral wall, and the lower surface of the overlapping piece of the cover top of the cathode cover is pressed against the upper surface of the cover top of the cathode cover.

7. The battery bezel of claim 6, attached to the negative cover top, wherein: the outer side of the peripheral wall of the negative electrode cover is coaxially sleeved with a positive electrode shell, an annular groove is formed between the peripheral wall of the negative electrode cover and the inner side face of the positive electrode shell, and the lower edge of the bottom ring body is inserted into the annular groove.

8. The battery bezel of claim 7, attached to the negative cover top, wherein: the bottom ring body is provided with a positive shell overlapping piece extending outwards along the radial direction of the periphery of the bottom ring body.