CN213636122U

CN213636122U - Alkaline manganese cell

Info

Publication number: CN213636122U
Application number: CN202022669228.3U
Authority: CN
Inventors: 徐梓恒; 王世杰; 孙刚
Original assignee: Zhengjiang Mustang Battery Co ltd
Current assignee: Zhengjiang Mustang Battery Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-06
Anticipated expiration: 2030-11-18

Abstract

An alkaline manganese battery comprises a metal shell, a negative bottom cover, a sealing ring, a buffer ring, a negative current collector and a current collector fixing block, wherein a first bent part extending inwards is arranged at the contact position of the negative bottom cover of the metal shell, a second bent part matched with the first bent part and connected with the first bent part in a sealing mode extends from the edge part of the negative bottom cover, the sealing ring comprises a convex part and a connecting part connected with the convex part, the convex part is arranged between the inner surface of the metal shell and the edge part of the negative bottom cover and is abutted against the inner surface of the metal shell and the edge part of the negative bottom cover, the connecting part is connected with the convex part, and one end of the connecting part extends into the; buffer ring one end sets up the sealing washer with between the second kink, the buffer ring other end extends to inside the mass flow body fixed block, wherein, the negative pole bottom the buffer ring forms explosion-proof chamber.

Description

Alkaline manganese cell

Technical Field

The utility model relates to a battery manufacturing field especially relates to an alkali-manganese cell.

Background

The existing alkaline manganese battery mainly comprises a positive electrode body, an isolating tube, a negative electrode body, electrolyte, a sealing body and the like. The sealing body comprises a negative electrode bottom cover, a current collector, a metal supporting body and a sealing body. In the sealing structure, the center of the negative bottom cover is combined with the current collector through a high-temperature welding process technology, and the combination part of the through hole in the center of the sealing body and the current collector in the through hole is matched by adopting a special process technology, so that alkali leakage and liquid leakage of the center column can be prevented. The edge of the sealing body is attached to the top end of the metal shell, the edge of the sealing body and the top end of the metal shell extend upwards for a certain distance together, then the sealing body is bent towards the center direction and continues to be bent downwards; one side of the bent part of the sealing body, which faces the center, is supported by the metal supporting body, so that the sealing body is extruded by the metal supporting body and the metal shell to achieve a sealing effect, and the edge of the negative electrode bottom cover is also inserted into the bent part of the sealing body and the metal shell and is clamped by the bent part; the metal support body not only plays a role in extruding the sealing body, but also has limited strength due to the fact that the existing metal shell is generally made of cold-rolled steel strips, the cathode bottom cover has the same limited strength, and the metal support body also plays a role in supporting the cathode bottom cover and the metal shell, so that the whole sealing mechanism keeps the strength.

In order to prevent leakage of the battery, a sealing ring is usually provided between the end cap and the battery case. During the use of the battery, gas is generated in the battery due to the overhigh temperature or over-discharge of the battery, so that the internal pressure is increased, and the battery is deformed or even exploded. Therefore, an explosion-proof structure is usually additionally arranged in the battery for the use safety of the battery. But the effective volume of battery can be influenced to the sealing washer and the explosion-proof structure of addding, leads to battery storage capacity to reduce, consequently the utility model provides a can realize the sealing washer of explosion-proof and avoid the weeping, reduce simultaneously and occupy the battery inner space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an alkali-manganese cell to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an alkaline manganese battery comprises a metal shell, a negative bottom cover, a sealing ring, a buffer ring, a negative current collector and a current collector fixing block, wherein a first bent part extending inwards is arranged at the contact position of the negative bottom cover of the metal shell, a second bent part matched with the first bent part and connected with the first bent part in a sealing mode extends from the edge part of the negative bottom cover, the sealing ring comprises a convex part and a connecting part connected with the convex part, the convex part is arranged between the inner surface of the metal shell and the edge part of the negative bottom cover and is abutted against the inner surface of the metal shell and the edge part of the negative bottom cover, the connecting part is connected with the convex part, and one end of the connecting part extends into the; buffer ring one end sets up the sealing washer with between the second kink, the buffer ring other end extends to inside the mass flow body fixed block, wherein, the negative pole bottom with form explosion-proof chamber between the buffer ring.

In one embodiment, the upper and lower surfaces of the cushion ring disposed between the seal ring and the second bent portion are respectively bonded to the seal ring and the second bent portion.

In one embodiment, a plurality of vent holes are formed above the explosion-proof cavity and on the negative bottom cover.

In one embodiment, the minimum inner diameter of the vent hole is 0.4 to 1mm, and the maximum inner diameter is 1.3 to 1.7 mm.

In one embodiment, the vent hole is of a wide-mouthed design.

Compared with the prior art, the beneficial effects of the utility model are that: on one hand, the utility model discloses a metal casing is provided with the first kink that extends inwards at negative pole bottom contact department, and the edge part of negative pole bottom extends has the second kink that matches and sealing connection with first kink, sets up between the sealing washer with the second kink through buffer ring one end simultaneously, makes the upper and lower face of buffer ring laminate with sealing washer and second kink respectively, thereby reaches the possibility of avoiding the battery to take place the weeping; on the other hand, extend to through the buffering circle other end inside the mass flow body fixed block, and make the negative pole bottom the buffering circle forms explosion-proof chamber, and then realizes explosion-proof and avoid the dual function of weeping through the cooperation of buffering circle and sealing washer, reduces simultaneously and occupies the battery inner space, has effectively guaranteed battery power, and in addition, the air vent adopts wide-mouthed formula design, avoids the accumulational condition of dust to take place.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 10. the metal shell, 20, the negative electrode bottom cover, 21, the vent hole, 30, the sealing ring, 31, the convex part, 32 the connecting part, 40, the buffer ring, 50, the negative current collector, 60, the current collector fixing block, 70, the first bending part, 80, the second bending part, 90 and the explosion-proof cavity.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, feature details such as specific configurations and components are provided only to help a full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The utility model provides an alkaline manganese battery.

As shown in fig. 1, an alkali-manganese battery includes a metal housing 10, a negative bottom cover 20, a sealing ring 30, a buffer ring 40, a negative current collector 50, and a current collector fixing block 60, where the metal housing 10 is provided with a first bending portion 70 extending inward at a contact position of the negative bottom cover 20, an edge portion of the negative bottom cover 20 extends to form a second bending portion 80 matching and being hermetically connected with the first bending portion 70, and further, the sealing ring 30 includes a convex portion 31 and a connecting portion 32 connecting the convex portion 31, where the convex portion 31 is disposed between an inner surface of the metal housing 10 and an edge portion of the negative bottom cover 20 and is abutted against the inner surface of the metal housing 10 and the edge portion of the negative bottom cover 20, and the connecting portion 32 is connected with the convex portion 31 and has one end extending to the inside of the current collector fixing block 60. Therefore, the first bent portion 70 and the second bent portion 80 are hermetically connected to avoid the possibility of battery leakage, and the protrusion 31 is disposed between the inner surface of the metal case 10 and the edge portion of the negative electrode bottom cover 20 and is in contact with the inner surface of the metal case 10 and the edge portion of the negative electrode bottom cover 20, so that the sealing ring 30 can further avoid the possibility of battery leakage.

As shown in the figure, one end of the buffer ring 40 is disposed between the sealing ring 30 and the second bending portion 80, and the upper and lower surfaces of the buffer ring 40 disposed between the sealing ring 30 and the second bending portion 80 are respectively attached to the sealing ring 30 and the second bending portion 80. Therefore, one end of the buffer ring 40 is arranged between the sealing ring 30 and the second bending part 80, and the upper surface and the lower surface of the buffer ring 40 are respectively attached to the sealing ring 30 and the second bending part 80, so that the sealing ring 30 can be further fixed on the metal shell 10, the sealing performance of the metal shell 10 is improved, and the possibility of leakage of the battery is effectively avoided.

Further, the other end of the buffer ring 40 extends to the inside of the current collector fixing block 60, wherein an explosion-proof cavity 90 is formed between the negative electrode bottom cover 20 and the buffer ring 40, a plurality of vent holes 21 are formed in the upper portion of the explosion-proof cavity 90 and the negative electrode bottom cover 20, so that when gas is generated inside the battery, the gas can press the seal ring 30 and enable the seal ring to abut against the buffer ring 40, at the moment, the seal ring 30 is deformed to abut against the gas, then the buffer ring 40 is deformed to abut against the gas for the second time, pressure applied to the seal ring 30 is effectively relieved, and then the gas in the explosion-proof cavity 90 is discharged out through the vent holes 21, so that the seal ring 30 and the buffer ring 40 are matched to achieve double effects of explosion prevention and liquid leakage prevention, meanwhile, the occupied space inside the battery is reduced, and the electric quantity of.

The minimum inner diameter of the vent hole 21 is 0.4-1mm, and the maximum inner diameter is 1.3-1.7mm, so that external dust can be effectively prevented from entering the explosion-proof cavity 90.

Furthermore, the vent holes 21 are of a wide-mouthed design.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an alkaline manganese cell, includes metal casing (10), negative pole bottom cap (20), sealing washer (30), buffer ring (40), negative pole current collector (50) and current collector fixed block (60), its characterized in that: the metal shell (10) is provided with a first bending part (70) extending inwards at the contact position of the negative bottom cover (20), a second bending part (80) matched with the first bending part (70) and connected with the first bending part in a sealing mode extends from the edge part of the negative bottom cover (20), the sealing ring (30) comprises a convex part (31) and a connecting part (32) connected with the convex part (31), the convex part (31) is arranged between the inner surface of the metal shell (10) and the edge part of the negative bottom cover (20) and is abutted against the inner surface of the metal shell (10) and the edge part of the negative bottom cover (20), the connecting part (32) is connected with the convex part (31), and one end of the connecting part extends into the current collector fixing block (60); buffer ring (40) one end sets up sealing washer (30) with between second kink (80), buffer ring (40) other end extends to inside mass flow body fixed block (60), wherein, negative pole bottom (20) with form explosion-proof chamber (90) between buffer ring (40).

2. An alkaline manganese cell according to claim 1, wherein: the upper surface and the lower surface of a buffer ring (40) arranged between the sealing ring (30) and the second bending part (80) are respectively attached to the sealing ring (30) and the second bending part (80).

3. An alkaline manganese cell according to claim 1, wherein: a plurality of vent holes (21) are formed above the explosion-proof cavity (90) and on the negative bottom cover (20).

4. An alkaline manganese cell according to claim 3, wherein: the minimum inner diameter of the vent hole (21) is 0.4-1mm, and the maximum inner diameter is 1.3-1.7 mm.

5. An alkaline manganese cell according to claim 4, wherein: the vent hole (21) adopts a wide-mouthed design.