CN216413157U

CN216413157U - Button cell with shell sealing element and strong air leakage and liquid leakage preventing performance

Info

Publication number: CN216413157U
Application number: CN202121584893.0U
Authority: CN
Inventors: 胡卫国; 吴日福; 王军; 候季雄; 田华
Original assignee: Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Technology Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-04-29
Anticipated expiration: 2031-07-13

Abstract

The utility model relates to the technical field of button batteries, and discloses a button battery with a shell sealing element and high air leakage and liquid leakage prevention performance, which comprises a shell, wherein a second nickel strap is fixedly connected to the bottom in the shell, a second tab is fixedly connected to one side of the second nickel strap, a winding core is fixedly connected to the top of the second tab, a first tab is fixedly connected to the top of the winding core, a first nickel strap is fixedly connected to one side, away from the winding core, of the first tab, a sealing mechanism is fixedly connected to the top of the first nickel strap, and the shell is clamped on the outer ring of the sealing mechanism. This button cell that leak protection gas and weeping performance have casing sealing member through the sealing mechanism who sets up, utilizes but viscidity sealant layer barrier member, and metalwork and anodal casing adopt laser welding's dual cooperation to encapsulate down, have promoted button cell's the space of utilizing and have increased battery energy density and the sealed effect of reinforcing.

Description

Button cell with shell sealing element and strong air leakage and liquid leakage preventing performance

Technical Field

The utility model relates to the technical field of button batteries, in particular to a button battery with a shell sealing element and strong air leakage and liquid leakage prevention performance.

Background

The button cell shell consists of a positive electrode shell, a negative electrode shell and a sealing ring. The interior is composed of anode material, cathode material, electrolyte and the like. The positive electrode shell, the negative electrode shell and the sealing ring form a closed sealing structure, and the moisture in the air can generate a chemical reaction for decomposing the positive electrode material and the negative electrode material due to the extreme sensitivity of the positive electrode material, the negative electrode material and the electrolyte, so that the battery is inflated, high in internal resistance and ineffective. The electrolyte plays a role in conducting electrons between the anode and the cathode in the battery, and the conduction capability is reduced or fails due to the too little electrolyte, so that the internal resistance is high, and the battery cannot be charged. Excessive moisture, electrolyte deterioration, short circuit, high temperature and large amount of gas generation. Electrolyte in the battery is evaporated, the battery which is contacted with external air and the positive and negative electrode materials are contacted with the external air to form destructiveness, and the sealed and reliable shell is important to the service life, the performance and the quality of the battery. The traditional button cell adopts single-process riveting sealing to finish encapsulation, and the sealing surface is single and is easy to leak air and liquid, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a button cell with a shell sealing element and strong air leakage and liquid leakage prevention performance, so as to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a button cell that leak protection gas and weeping performance are strong has casing sealing member, which comprises an outer shell, bottom fixedly connected with second nickel strap in the shell, second nickel strap one side fixedly connected with second utmost point ear, second utmost point ear top fixedly connected with rolls up the core, roll up the first utmost point ear of core top fixedly connected with, first utmost point ear is kept away from the first nickel strap of core one side fixedly connected with, first nickel strap top fixedly connected with sealing mechanism, sealing mechanism outer lane joint has the shell.

The middle of the roll core is provided with a cavity, and one side of the first pole lug, which is close to the roll core, is arranged in the cavity.

Preferably, sealing mechanism includes the negative pole block, negative pole block bottom fixedly connected with separator, separator bottom fixedly connected with metalwork, the first sealing ring of metalwork outer lane top fixedly connected with, metalwork outer lane bottom fixedly connected with second sealing ring, the installation annular has been seted up between first sealing ring and second sealing ring to the metalwork outer lane, the metalwork has the deformation ring at installation annular internal fixation connection, deformation ring outer lane fixedly connected with joint piece.

Preferably, a first through hole is formed in the center of the isolating piece, a second through hole is formed in the center of the metal piece, a first nickel strap is arranged in the first through hole and the second through hole, the first nickel strap is fixedly connected to the middle of the bottom of the negative electrode cover cap, the nickel strap and the sealing mechanism can be connected through the first through hole and the second through hole which are reserved in advance, and the space can be effectively utilized to increase the energy density of the battery.

Preferably, the deformation annular has been seted up to the symmetry in the middle of deformation ring top and the bottom, set up the shape chamber in the deformation ring, can be when in the positive pole casing with joint piece pressfitting, through the shrink of shape chamber and deformation annular, guarantee that the joint piece easily slides in the joint inslot in the positive pole casing.

Preferably, the shell includes anodal casing, be close to top fixedly connected with backing ring in the anodal casing, second joint annular has been seted up at the backing ring top to anodal casing, the joint groove has been seted up at second joint annular top to anodal casing, first joint annular has been seted up at joint groove top to anodal casing.

Preferably, the positive pole casing has first sealing ring and second sealing ring through first joint annular and second joint annular joint, the positive pole casing has the joint piece through joint groove joint, can further guarantee the sealed effect between positive pole casing and the sealing mechanism.

Preferably, the joint groove is provided with four, four the joint groove right angle cross distribution can be guaranteed the stable joint of sealing mechanism in anodal casing to the accurate nature of later stage laser welding has been guaranteed to the leakproofness.

Compared with the prior art, the utility model provides the button cell with the shell sealing element, which has strong air leakage and liquid leakage prevention performance and has the following beneficial effects:

1. this button cell that leak protection gas and weeping performance have casing sealing member through the sealing mechanism who sets up, utilizes but viscidity sealant layer barrier member, and metalwork and anodal casing adopt laser welding's dual cooperation to encapsulate down, have promoted button cell's the space of utilizing and have increased battery energy density and the sealed effect of reinforcing.

2. This leak protection gas and weeping performance have casing sealing member's button cell by force, through the shell that sets up, when with the pressing fit of sealing mechanism in anodal casing, the backing ring can prevent that sealing mechanism from excessively rising into in the anodal casing, and first sealing ring and second sealing ring joint advance first joint annular and second joint annular after the pressing fit in, can further reach sealed effect, and joint piece and joint groove joint, can further guarantee the holistic fastening nature of sealing mechanism, the accurate nature of later stage laser welding has been guaranteed, can further reach sealed effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor:

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is an exploded view of the sealing mechanism;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a schematic front sectional view of the housing and sealing mechanism in cooperation;

FIG. 5 is a detail view taken of the housing and sealing mechanism in cooperation;

fig. 6 is a schematic view of a winding core.

In the figure: 1. a winding core; 2. a cavity; 3. a first tab; 4. a first nickel strap; 5. a second tab; 6. A second nickel strap; 7. a housing; 71. a positive electrode case; 72. a first snap ring groove; 73. a clamping groove; 74. A second clamping ring groove; 75. a backing ring; 8. a sealing mechanism; 81. a negative electrode cap; 82. a first through hole; 83. A spacer; 84. a metal member; 841. mounting a ring groove; 85. a second through hole; 86. a first seal ring; 87. A second seal ring; 88. a clamping block; 89. a deformation ring; 891. a deformation chamber; 892. and a deformation ring groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a button cell that leak protection gas and weeping performance are strong has casing sealing member, includes shell 7, bottom fixedly connected with second nickel strap 6 in the shell 7, second nickel strap 6 one side fixedly connected with second utmost point ear 5, second utmost point ear 5 top fixedly connected with roll up core 1, roll up the first utmost point ear 3 of core 1 top fixedly connected with, first utmost point ear 3 keeps away from the first nickel strap 4 of the first fixedly connected with of core 1 one side, 4 top fixedly connected with sealing mechanism 8 of first nickel strap, the joint of 8 outer lanes in sealing mechanism has shell 7.

The middle of the winding core 1 is provided with a cavity 2, and one side of the first pole lug 3, which is close to the winding core 1, is arranged in the cavity 2.

The sealing mechanism 8 comprises a negative electrode cap 81, a partition 83 is fixedly connected to the bottom of the negative electrode cap 81, the partition 83 is soft-package lithium battery tab glue, a metal piece 84 is fixedly connected to the bottom of the partition 83, a first through hole 82 is formed in the center of the partition 83, a second through hole 85 is formed in the center of the metal piece 84, a first nickel strap 4 is arranged in each of the first through hole 82 and the second through hole 85, the first nickel strap 4 is fixedly connected to the middle of the bottom of the negative electrode cap 81, a first sealing ring 86 is fixedly connected to the top of the outer ring of the metal piece 84, a second sealing ring 87 is fixedly connected to the bottom of the outer ring of the metal piece 84, an installation ring groove 841 is formed in the outer ring of the metal piece 84 between the first sealing ring 86 and the second sealing ring 87, the metal piece 84 is fixedly connected with a deformation ring 89 in the installation ring groove 841, deformation ring grooves 892 are symmetrically formed in the top and the middle of the bottom of the deformation ring 89, a deformation cavity 891 is formed in the deformation ring 89, deformation ring 89 outer lane fixedly connected with joint piece 88 through the sealing mechanism 8 that sets up, utilizes viscidity sealant layer barrier 83, and metalwork 84 and anodal casing 71 adopt laser welding's dual cooperation to encapsulate down, have promoted button cell's the space of utilizing and have increased battery energy density and the sealed effect of reinforcing.

The shell 7 comprises an anode shell 71, a backing ring 75 is fixedly connected in the anode shell 71 close to the top, a second clamping ring groove 74 is formed in the top of the backing ring 75 of the anode shell 71, a clamping groove 73 is formed in the top of the second clamping ring groove 74 of the anode shell 71, four clamping grooves 73 are arranged, the four clamping grooves 73 are distributed in the anode shell 71 in a right-angle and crossed manner, a first clamping ring groove 72 is formed in the top of the clamping groove 73 of the anode shell 71, a first sealing ring 86 and a second sealing ring 87 are clamped in the anode shell 71 through the first clamping ring groove 72 and the second clamping ring groove 74, a clamping block 88 is clamped in the anode shell 71 through the clamping grooves 73, through the shell 7, when the sealing mechanism 8 is pressed in the anode shell 71, the backing ring 75 can prevent the sealing mechanism 8 from excessively lifting into the anode shell 71, and the first sealing ring 86 and the second sealing ring 87 are clamped into the first clamping ring groove 72 and the second clamping ring groove 74 after pressing, can further reach sealed effect, and joint piece 88 and joint groove 73 joint can further guarantee the holistic fastening nature of sealing mechanism 8, have guaranteed later stage laser welding's accurate nature, can further reach sealed effect.

In the actual operation process, when this device uses, at the sealed glue film spacer 83 of utilizing viscidity, metalwork 84 and anodal casing 71 adopt laser welding's dual cooperation to encapsulate down, button cell's the space of utilizing has been promoted and battery energy density has been increased and sealed effect has been strengthened, and simultaneously, when with 8 pressfittings of sealing mechanism in anodal casing 71, backing ring 75 can prevent that sealing mechanism 8 from excessively rising into in anodal casing 71, and behind the pressfitting first sealing ring 86 and second sealing ring 87 joint advance in first joint annular 72 and the second joint annular 74, can further reach sealed effect, and joint piece 88 and joint groove 73 joint, can further guarantee the holistic leakproofness of sealing mechanism 8, the precision of later stage laser welding has been guaranteed, can further reach sealed effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a button cell of leak protection gas and weeping performance reinforce with casing sealing member, includes shell (7), its characterized in that: a second nickel strap (6) is fixedly connected to the bottom in the shell (7), a second tab (5) is fixedly connected to one side of the second nickel strap (6), a winding core (1) is fixedly connected to the top of the second tab (5), a first tab (3) is fixedly connected to the top of the winding core (1), a first nickel strap (4) is fixedly connected to one side, away from the winding core (1), of the first tab (3), a sealing mechanism (8) is fixedly connected to the top of the first nickel strap (4), and the shell (7) is clamped on the outer ring of the sealing mechanism (8);

a cavity (2) is formed in the middle of the winding core (1), and one side, close to the winding core (1), of the first tab (3) is arranged in the cavity (2);

sealing mechanism (8) include negative pole cap (81), negative pole cap (81) bottom fixedly connected with separator (83), separator (83) bottom fixedly connected with metalwork (84), metalwork (84) outer lane top fixedly connected with first sealing ring (86), metalwork (84) outer lane bottom fixedly connected with second sealing ring (87), installation annular (841) has been seted up between first sealing ring (86) and second sealing ring (87) in metalwork (84) outer lane, metalwork (84) have become ring (89) in installation annular (841) internal fixation connection, it has joint piece (88) to become ring (89) outer lane fixedly connected with.

2. The button cell with the casing sealing member having the air leakage and liquid leakage preventing functions as claimed in claim 1, wherein: first through-hole (82) have been seted up at separator (83) center, second through-hole (85) have been seted up at metalwork (84) center, be provided with first nickel strap (4) in first through-hole (82) and second through-hole (85), first nickel strap (4) fixed connection is in the middle of negative pole nut cap (81) bottom.

3. The button cell with the casing sealing member having the air leakage and liquid leakage preventing functions as claimed in claim 1, wherein: deformation ring groove (892) have been seted up to deformation ring (89) top and bottom middle symmetry, set up in deformation ring (89) and have become chamber (891).

4. The button cell with the casing sealing member having the air leakage and liquid leakage preventing functions as claimed in claim 1, wherein: shell (7) include anodal casing (71), be close to top fixedly connected with backing ring (75) in anodal casing (71), second joint annular (74) have been seted up at backing ring (75) top in anodal casing (71), joint groove (73) have been seted up at second joint annular (74) top in anodal casing (71), first joint annular (72) have been seted up at joint groove (73) top in anodal casing (71).

5. Button cell with casing seal of claim 4 with strong air and liquid leakage prevention, characterized in that: anodal casing (71) have first sealing ring (86) and second sealing ring (87) through first joint annular (72) and second joint annular (74) joint, anodal casing (71) have joint piece (88) through joint groove (73) joint.

6. Button cell with casing seal of claim 4 with strong air and liquid leakage prevention, characterized in that: the clamping grooves (73) are four, and the clamping grooves (73) are distributed in the anode shell (71) in a right-angle crossed mode.