CN204144364U

CN204144364U - Sealing ring of alkaline manganese-zinc battery

Info

Publication number: CN204144364U
Application number: CN201420466817.3U
Authority: CN
Inventors: 忻琳浩; 周时健
Original assignee: Ningbo Guanghua Battery Co ltd
Current assignee: Ningbo Guanghua Battery Co ltd
Priority date: 2014-08-18
Filing date: 2014-08-18
Publication date: 2015-02-04
Anticipated expiration: 2024-08-18

Abstract

The utility model discloses a seal ring of an alkaline manganese-zinc battery, which comprises a seal ring body, wherein the seal ring body is provided with a middle column (14) and a blast groove (15) positioned at the inner side of the bottom wall of the seal ring body, and a groove (13) is also arranged at the position corresponding to the blast groove (15) at the outer side of the bottom wall of the seal body; the utility model discloses the diapire inboard of well seal body sets up the blast groove, and the corresponding diapire outside still is equipped with the recess, and reasonable control blast groove (15) and recess (13) structure size, like this, compare with prior art, can acquire suitable effectual burst pressure to realize that the battery does not explode when doing three positive anti-safety tests and does not leak liquid when doing high temperature, high low temperature, high temperature and high humidity battery capability test.

Description

Sealing ring of alkaline manganese-zinc battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a sealing ring of an alkaline manganese-zinc battery.

Background

The alkaline Mn-Zn cell is a kind of Zn-Mn cell using alkaline matter such as potassium hydroxide solution as electrolyte, and is an improvement of neutral Zn-Mn cell. Electrolytic manganese dioxide is used as a positive active substance, and is mixed with materials such as conductive graphite powder and the like to be pressed into a ring shape, and zinc powder is used as a negative active substance, and is mixed with electrolyte and gel to form a paste.

The sealing ring is one of the very important parts of the alkaline battery, and the sealing ring is mainly used for isolating the positive electrode and the negative electrode of the battery, preventing the leakage of the battery and ensuring the use safety of the battery. That is, when the battery is misused (for example, incorrect installation, external short circuit, falling, etc.), the instantaneous energy in the battery may be gathered greatly, and at the moment, the energy is required to be emitted in time, and if the energy cannot be emitted in time, dangerous accidents such as battery explosion and life injury may occur.

Generally, the prior art adopts a mode of arranging a bursting groove on a sealing ring to prevent the accidents, and when the internal capacity of the battery is accumulated, the bursting groove is burst to release the internal energy of the battery. A typical seal ring structure of the prior art is given below. The sealing washer includes the sealing washer body, and the middle part of sealing washer body is provided with the center post, and the periphery of center post is provided with annular blast groove, and in order to realize better explosion-proof function, the thickness of blast groove is generally thinner the better, but in order to guarantee that the battery is not the weeping when normal use, blast groove thickness must keep a reasonable value again.

The sealing ring is provided with the explosion groove, so that a weak link is provided, the possibility of battery leakage is improved, and the leakage of the battery in the normal use process causes damage to an electric appliance and is not accepted by a user. Therefore, the sealing ring explosion groove is reasonably arranged, and the sealing ring explosion groove has proper pressure resistance, which is a difficult point for designing and producing the sealing ring. At present, the LR20, LR14, LR6 and LR03 battery sealing rings are mature in technology, but due to the small size and the greater difficulty in arranging the explosion groove, when the LR61 battery sealing ring is produced domestically for a long time, the sealing ring is not provided with the explosion groove, namely, the sealing ring does not have an explosion-proof function.

Therefore, how to improve the structure of the conventional LR61 sealing ring and improve the safety and reliability of the LR61 battery in use is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a structure of sealing washer, this sealing washer can improve security and the reliability that the battery used.

In order to solve the technical problem, the utility model provides a sealing washer for basicity manganese zinc battery, including the sealing washer body, the sealing washer body has the middle part post, and is located the inboard blast groove of diapire of sealing washer body, the diapire outside of sealing washer body is corresponding the position of blast groove still is provided with the recess.

Preferably, the radial dimension of the recess is greater than the radial dimension of the blast groove.

Preferably, the sealing washer body including set up in middle part post outlying circumference lateral wall, the circumference lateral wall is connected through the horizontal wall that the middle part set up the surface of middle part post, the diapire does the horizontal wall, the blast groove with the recess set up respectively in the lower surface and the upper surface of horizontal wall, just circumference interference fit at the bottom of circumference lateral wall and the negative pole of battery.

Preferably, the connecting position of the circumferential side wall and the transverse wall forms a fillet structure matched with the negative pole bottom of the battery, and the transverse wall between the groove and the circumferential side wall is in contact with the negative pole bottom in a fitting manner.

Preferably, the distance from the groove bottom of the blast groove to the groove bottom of the corresponding groove is in the range of 0.10mm-0.15mm.

Preferably, the groove depth range of the groove is: 0.30mm-0.40mm.

Preferably, the blast groove is annular and is arranged on the periphery of the middle column, the longitudinal section of the blast groove is a right trapezoid, and the radial size of an opening of the right trapezoid structure is larger than that of the bottom of the upper groove.

Preferably, the radial width of the groove bottom is in the range of: 0.25mm-0.35mm; the projection width of the oblique edge in the cross section is 0.10mm-0.20mm; the size range from the opening surface of the right trapezoid to the groove bottom of the corresponding groove is as follows: 0.35mm-0.45mm.

Preferably, the maximum radial width of the groove ranges from: 4.8mm-5.2mm.

The utility model discloses the diapire inboard of well sealed body sets up the blast groove, and the corresponding diapire outside still is equipped with the recess, and reasonable control blast groove and groove structure size, like this, compare with prior art, can acquire suitable effectual burst pressure to realize that the battery is not exploded when doing the anti-safety test of three positive one and not weeping when doing high temperature, high low temperature, humid tropical battery capability test.

Drawings

Fig. 1 is a schematic structural diagram of a seal ring according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of fig. 1.

Wherein, the one-to-one correspondence between component names and reference numbers in fig. 1 to 2 is as follows:

11 rounded corner structures, 12 transverse walls, 13 grooves, 14 middle columns, 14a through holes, 15 blast grooves and 16 circumferential side walls.

Detailed Description

The utility model discloses a core is for providing the structure of a sealing washer, and this sealing washer can improve security and the reliability that the battery used.

The technical solution is described herein by taking the use of the sealing ring in LR61 alkaline manganese zinc cell as an example, and it should be understood by those skilled in the art that the application of the sealing ring provided herein to other cells is also within the protection scope of the present disclosure.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a seal ring according to an embodiment of the present invention.

The utility model provides a sealing washer for LR61 alkaline manganese zinc battery, including the sealing washer body, the sealing washer body has middle part post 14, generally, is provided with through-hole 14a on the middle part post 14, and the interference of copper needle is installed inside this through-hole 14a to contact at the bottom of the outer tip of copper needle and the negative pole of battery.

The bottom wall inboard of sealing washer body still is provided with blast groove 15, and blast groove 15 can encircle middle part post 14 peripheral setting, and like this, when battery internal pressure was too big, inside gas can be along middle part post 14 blasting.

The utility model discloses the corresponding blast groove 15's in the diapire outside of well seal body position still is provided with recess 13.

It should be noted that, in the present invention, the terms of the inside and outside directions refer to the assembled battery, and one end of the sealing liquid near the inside of the battery is defined as the inside, and correspondingly, one side near the bottom of the negative electrode is the outside.

The utility model discloses the diapire inboard of well seal body sets up blast groove 15, and the corresponding diapire outside still is equipped with recess 13, and reasonable control blast groove and groove structure size, like this, compare with prior art, can acquire suitable effectual burst pressure to realize that the battery does not explode when doing three positive anti-safety tests and does not leak liquid when doing high temperature, high low temperature, high temperature and high humidity battery capability test.

Further, the radial dimension of the above-mentioned groove 13 may be greater than the radial dimension of the blast groove 15; the size of the recess 13 is larger than the size of the blast groove 15 to facilitate full opening of the blast groove 15 from the inside to the outside.

The longitudinal section of the groove 13 in the above embodiment may be an inverted right trapezoid structure, and the radial size of the opening of the inverted right trapezoid structure is greater than the radial size of the bottom of the groove; of course, other shapes are possible.

In a specific embodiment, the sealing ring body may include a circumferential side wall 16 disposed at the periphery of the middle column 14, the circumferential side wall 16 is connected to the outer surface of the middle column 14 through a transverse wall 12 disposed at the middle, the bottom wall is a transverse wall, the blasting groove 15 and the groove 13 are respectively disposed on the lower surface and the upper surface of the transverse wall, and the circumferential side wall 16 is in circumferential interference fit with the negative electrode bottom of the battery. It should be noted that the above, below and other directional terms are defined by the relative relationship between the components in fig. 1, and are only for the simplicity of describing the technical solution, and it should be understood by those skilled in the art that the application of the directional terms herein should not limit the scope of protection of the present disclosure.

Further, the connecting position of the circumferential side wall 16 and the transverse wall is matched with the negative pole bottom of the battery to form a fillet structure 11, and the transverse wall between the groove 13 and the circumferential side wall 16 is in contact with the negative pole bottom in a fitting manner; the sealing ring is favorable for supporting the negative pole bottom to a certain extent, and the negative pole bottom and the connecting position of the circumferential direction and the bottom wall of the sealing ring are sealed by the fillet structure 11, so that the sealing reliability between the negative pole bottom and the sealing ring can be improved.

A preferred construction of blast trench 15 is provided below, as described in more detail below.

In a preferred embodiment, the blast groove 15 is annular, is arranged on the periphery of the middle column 14, and has a right-angled trapezoid structure in longitudinal section, and the radial dimension of the opening of the right-angled trapezoid structure is larger than that of the bottom of the upper groove. Thus, as the cell internal pressure builds up, the stress at the contact of the burst groove 15 with the center post 14 increases dramatically, where it bursts rapidly first.

Referring to fig. 2, fig. 2 is a partially enlarged view of fig. 1.

In a preferred embodiment, the distance D from the bottom of the blast groove 15 to the bottom of the groove of the respective groove 13 is in the range of 0.10mm to 0.15mm. Experiments prove that when the thickness of the groove bottom is within the numerical range, the leakage phenomenon of the battery in normal use can be ensured, the quick explosion of the battery in abnormal use can be ensured, and the safe and reliable use of the battery is ensured.

The radial width a of the trench bottom ranges from: 0.25mm-0.35mm; the projection width B of the oblique edge in the cross section is 0.10mm-0.20mm; the range of the distance C from the opening surface of the right trapezoid to the bottom of the corresponding groove 13 is: 0.35mm-0.45mm.

In the above embodiments, the groove depth E of the groove 13 may be in the range: 0.30mm to 0.40mm, the maximum radial width F of the groove 13 may range: 4.8-5.2mm.

For other structures of the alkaline zinc-manganese dioxide battery, please refer to the prior art, which is not described herein.

The alkaline zinc-manganese dioxide cell and the sealing ring thereof provided by the utility model are introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The sealing ring for the alkaline manganese-zinc battery comprises a sealing ring body, wherein the sealing ring body is provided with a middle column (14) and a blasting groove (15) which is positioned on the inner side of the bottom wall of the sealing ring body, and is characterized in that a groove (13) is further formed in the position, corresponding to the blasting groove (15), on the outer side of the bottom wall of the sealing body.

2. A seal ring according to claim 1, characterized in that the radial dimension of the groove (13) is greater than the radial dimension of the burst disk (15).

3. The seal ring according to claim 1, wherein the seal ring body comprises a circumferential side wall (16) arranged at the periphery of the middle column (14), the circumferential side wall (16) is connected with the outer surface of the middle column (14) through a transverse wall (12) arranged at the middle part, the bottom wall is the transverse wall (12), the blasting groove (15) and the groove (13) are respectively arranged at the lower surface and the upper surface of the transverse wall (12), and the circumferential side wall (16) is in circumferential interference fit with the negative electrode bottom of a battery.

4. A gasket ring according to claim 3, characterized in that the connection point of the circumferential side wall (16) and the transverse wall (12) forms a fillet structure cooperating with the negative base of the cell, and the transverse wall (12) between the groove (13) and the circumferential side wall (16) is in abutting contact with the negative base.

5. A ring seal according to claim 2, characterized in that the distance (D) from the groove bottom of the burst groove (15) to the groove bottom of the respective groove (13) is in the range 0.12mm-0.15mm.

6. A seal ring according to claim 2, characterized in that the groove depth (E) of the groove (13) ranges from: 0.30mm-0.40mm.

7. A seal ring according to any one of claims 1 to 6, characterized in that the burst groove (15) is annular, is arranged on the periphery of the central column (14), and has a right-angled trapezoidal longitudinal section, the radial dimension of the opening of the right-angled trapezoidal section being greater than the radial dimension of the upper groove bottom.

8. The seal ring according to claim 7, characterized in that the radial width (A) of the groove bottom ranges from: 0.25mm-0.35mm; the projection width (B) of the oblique side in the cross section is 0.10mm-0.20mm; the range of the distance (C) from the opening surface of the right trapezoid to the bottom of the groove (13) is as follows: 0.35mm-0.45mm.

9. A seal ring according to claim 7, characterized in that the maximum radial width (F) of the groove (13) ranges from: 4.8mm-5.2mm.