CN218849623U

CN218849623U - Explosion-proof button cell

Info

Publication number: CN218849623U
Application number: CN202222967781.4U
Authority: CN
Inventors: 陈建勇
Original assignee: Dongguan Yongze Electronic Technology Co ltd
Current assignee: Dongguan Yongze Electronic Technology Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-04-11
Anticipated expiration: 2032-11-08

Abstract

The utility model relates to a button cell technical field, and an explosion-proof button cell is disclosed, including lower casing, with casing fixed connection's insulating layer down, with the last casing of insulating layer joint, the wall of going up the casing sets up the buffering portion, when electric core is extruded deformation explosion, the common cavity internal pressure that forms of casing and last casing risees down, the gas and the material of inflation promote the extrusion and cut off, cut off owing to set up indent and deformation chamber, cut off weak part can deform until breaking, reduce the explosion limit in the chamber, absorb the volume expansion that partial explosion leads to, break through when expanded material and gas and break and cut off and get into first cushion intracavity, the material can get into the second cushion intracavity from first cushion and make sealing portion expansion deformation realize the second order explosion-proof, further slow down the repulsion between casing and the lower casing, prevent that upper casing and insulating layer break away from and cause the material in the chamber to overflow, explosion-proof effect is better.

Description

Explosion-proof button cell

Technical Field

The utility model relates to a button cell technical field especially relates to an explosion-proof button cell.

Background

The prior art has been searched for disclosing an explosion-proof button cell housing (CN 201821639844.0) comprising a positive electrode case; the plastic ring is arranged in the positive electrode shell, is matched with the positive electrode shell and is provided with a clamping groove; and a negative electrode cover fixedly connected with the clamping groove on the plastic ring; the negative cover comprises a cover body; by adopting the design, when the internal pressure of the button battery is increased due to failure, the negative shell is jacked upwards under the action of the internal pressure, so that the explosion-proof hole is exposed out of the surface of the shell of the button battery, the pressure inside the button battery is relieved, and the problem that the button battery explodes due to continuous increase of the internal pressure is solved;

the prior art is through strengthening the upper and lower casing of battery in order to reach the purpose of reinforcing explosion-proof effect, but the battery is when exploding, and inside material volume inflation, closed housing provides the explosion limit in the prerequisite of explosion for expanded material, does not absorb and cushion, just strengthens the connection between the casing alone, and explosion-proof effect is not ideal, once the range of inflation is greater than the extreme value that the casing can bear, and explosion intensity can further increase, and prior art exists the space that can optimize.

To this end, an explosion-proof button cell is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide an explosion-proof button cell.

In order to realize the above-mentioned purpose, the utility model discloses a following technical scheme, an explosion-proof button cell, including lower casing, with casing fixed connection's insulating layer down, with the last casing of insulating layer joint, the wall of going up the casing forms the boss, and the internal face of insulating layer forms the sunken of aligning, and the intracavity of casing is provided with electric core down, the wall of going up the casing sets up buffer, buffer includes sealing, cuts off, first cushion chamber, second cushion chamber, indent and deformation chamber, cut off and last casing fixed connection, the top surface of going up the casing forms sealing, forms the second cushion chamber between sealing and the last casing, cuts off and forms first cushion chamber between the top surface in the casing, and first cushion chamber communicates with the second cushion chamber each other, and indent and deformation chamber are seted up to the wall that cuts off.

In a further limitation of the above aspect, the upper housing is a cylinder with a closed upper end, the partition is a metal circular plate and is fixedly connected to an inner wall surface of the upper housing, the sealing portion is integrally formed with the upper housing, and the sealing portion is in a circular truncated cone shape.

As a further limitation of the scheme, the top surface and the bottom surface of the partition are provided with deformation cavities at equal intervals, and the deformation cavities are inwards recessed in the center of the bottom surface of the partition.

As a further limitation of the above scheme, the deformation cavity is a circular hole, the deformation cavities on the top surface of the partition are distributed in an annular array, the depths of the deformation cavities on the top surface of the partition are increased progressively from the circumference of the partition to the direction of the circle center of the partition, and the deformation cavities on the bottom surface of the partition and the deformation cavities on the top surface of the partition are arranged in a staggered manner.

As a further limitation of the above scheme, the buffer part further includes an evacuation channel, a partition part, and a backflow channel, the evacuation channel is provided on the wall surface of the upper housing, the first buffer cavity and the second buffer cavity are connected with each other through the evacuation channel, the partition part is provided in the evacuation channel, and the backflow channel is formed between the partition parts.

As a further limitation of the above scheme, the evacuation channel is opened on the top surface of the upper housing, the evacuation channel is funnel-shaped, and the partition part is fixedly connected with the inner wall surface of the upper housing.

As a further limitation of the scheme, the spacing parts are annular plates, a plurality of spacing parts are arranged in the evacuation channel at equal intervals from top to bottom, the diameters of the center holes of the spacing parts are decreased progressively from top to bottom, and the center holes of the spacing parts form a backflow channel together.

Advantageous effects

The utility model provides an explosion-proof button cell. The method has the following beneficial effects:

(1) This explosion-proof button cell, realize the joint of casing and insulating layer in the sunken of insulating layer wall through the boss that will go up the casing wall extrudees into, the electrode slice of electricity core forms positive negative pole with last casing and lower casing laminating respectively, this is current well-known technique, do not do the repeated description here, when the electricity core is extruded deformation explosion, the common cavity internal pressure that forms of casing and last casing risees down, expanded gas and material promote the extrusion wall, the wall is owing to set up indent and deformation chamber, the wall weak part can be deformed until breaking, slow down the repulsion between last casing and the lower casing, reduce the explosion limit in the chamber, the volume expansion that the absorption part explosion leads to, realize one-level explosion-proof, material and gas burst wall that expand get into first cushion chamber, because first cushion chamber and second cushion chamber communicate each other, the material can get into the second cushion chamber from first cushion chamber and make the sealing part expand and deform and realize the second order explosion-proof, further slow down the repulsion between last casing and the lower casing, prevent that the material that upper casing breaks away from with the insulating layer and causes the outer explosion-proof effect is better.

(2) This explosion-proof button cell, when material and gas in the first buffer cavity get into the second buffer cavity, material and gas get into the second buffer cavity from sparse passageway, when through sparse passageway, form the refluence passageway through a plurality of intervals, the material needs the passageway that the opening from bottom to top that forms gradually accepts through the refluence passageway, can receive certain resistance when the material gets into the second buffer cavity, but can not prevent first buffer cavity material entering second buffer cavity completely, the material that gets into in the second buffer cavity promotes the volume expansion that the deformation buffering of sealing leads to of portion, and simultaneously, the material can produce reaction force because of the resistance when sparse passageway, restrict the material in the first buffer cavity and continue the inflation, the material that casing and last casing cavity and first buffer cavity continue the inflation under the restriction, form the restriction each other, the restriction, reach explosion-proof, multiple purpose of preventing leaking.

Drawings

The structures, proportions, sizes, and other elements shown in the specification are for the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims.

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

FIG. 2 is a sectional view of the upper housing of the utility model;

fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

Illustration of the drawings:

10. a lower housing; 11. an upper housing; 12. an insulating layer; 13. a boss; 20. a sealing part; 21. separating; 22. a first buffer chamber; 23. a second buffer chamber; 24. recessing; 25. a deformation chamber; 30. evacuating the channel; 31. a spacer section; 32. a reflux channel.

Detailed Description

An explosion-proof button cell, as shown in fig. 1-2, comprises a lower casing 10, an insulating layer 12 fixedly connected with the lower casing 10, an upper casing 11 clamped with the insulating layer 12, a boss 13 formed on the wall surface of the upper casing 11, an aligned recess formed on the inner wall surface of the insulating layer 12, a battery cell arranged in the cavity of the lower casing 10, a buffer part arranged on the wall surface of the upper casing 11, the buffer part comprising a sealing part 20, a partition 21, a first buffer cavity 22, a second buffer cavity 23, an indent 24 and a deformation cavity 25, the partition 21 being fixedly connected with the upper casing 11, a sealing part 20 formed on the top surface of the upper casing 11, a second buffer cavity 23 formed between the sealing part 20 and the upper casing 11, a first buffer cavity 22 formed between the partition 21 and the inner top surface of the upper casing 11, the first buffer cavity 22 and the second buffer cavity 23 being communicated with each other, an indent 24 and a deformation cavity 25 formed on the wall surface of the partition 21, the upper casing 11 being a cylinder with a closed upper end, a metal circular plate of a partition 21 is fixedly connected with the inner wall surface of an upper shell 11, a sealing part 20 is integrally formed with the upper shell 11, the sealing part 20 is in a circular truncated cone shape, deformation cavities 25 are equidistantly formed in the top surface and the bottom surface of the partition 21, an indent 24 is formed in the center of the bottom surface of the partition 21, the deformation cavities 25 are circular holes, the deformation cavities 25 in the top surface of the partition 21 are distributed in an annular array, the depths of the deformation cavities 25 in the top surface of the partition 21 are increased from the circumference of the partition 21 to the center of the partition 21, the deformation cavities 25 in the bottom surface of the partition 21 and the deformation cavities 25 in the top surface of the partition 21 are staggered, a boss 13 in the wall surface of the upper shell 11 is extruded into a recess in the wall surface of an insulating layer 12 to clamp the upper shell 11 and the insulating layer 12, electrode plates of a battery cell are respectively attached to the upper shell 11 and the lower shell 10 to form positive and negative electrodes, which are the prior art and are not described herein, when the electric core is extruded and deformed to explode, the internal pressure of a cavity formed by the lower shell 10 and the upper shell 11 together rises, expanded gas and materials push the extrusion partition 21, the partition 21 is provided with an indent 24 and a deformation cavity 25, the weak part of the partition 21 can deform until being broken, the repulsion force between the upper shell 11 and the lower shell 10 is reduced, the explosion limit in the cavity is reduced, the volume expansion caused by the explosion of the absorption part is realized, the first-level explosion prevention is realized, when the expanded materials and the gas break the partition 21 to enter the first buffer cavity 22, the first buffer cavity 22 is communicated with the second buffer cavity 23, the materials can enter the second buffer cavity 23 from the first buffer cavity 22 to enable the sealing part 20 to expand and deform to realize the second-level explosion prevention, the repulsion force between the upper shell 11 and the lower shell 10 is further reduced, the situation that the materials in the cavity are separated from the upper shell 11 and the insulating layer 12 to overflow is prevented, and the explosion prevention effect is better.

An explosion-proof button cell, as shown in fig. 2-fig. 3, the buffer part further comprises an evacuation channel 30, a partition part 31, and a reverse flow channel 32, the evacuation channel 30 is provided on the wall surface of the upper housing 11, the first buffer cavity 22 and the second buffer cavity 23 are connected with each other through the evacuation channel 30, a plurality of partition parts 31 are provided in the evacuation channel 30, the reverse flow channel 32 is formed between the partition parts 31, the evacuation channel 30 is provided on the top surface of the upper housing 11, the evacuation channel 30 is funnel-shaped, the partition parts 31 are fixedly connected with the inner wall surface of the upper housing 11, the partition parts 31 are annular plates, a plurality of partition parts 31 are provided at equal intervals from top to bottom in the evacuation channel 30, the diameters of the central holes of the partition parts 31 are decreased from top to bottom, the central holes of the plurality of partition parts 31 together form the reverse flow channel 32, when the material and the gas in the first buffer cavity 22 enter the second buffer cavity 23, the material and gas get into second cushion chamber 23 from evacuation passageway 30, when evacuation passageway 30, form backward flow passageway 32 through a plurality of partitions 31, the material needs the passageway that the opening from bottom to top that forms through backward flow passageway 32 was gradually received, the material can receive certain resistance when getting into in the second cushion chamber 23, but can not prevent material entering in the first cushion chamber 22 completely and get into in the second cushion chamber 23, the material that gets into in the second cushion chamber 23 promotes the volume inflation that the deformation buffering explosion of sealing 20 leads to, simultaneously, the material can produce the reaction force because of the resistance when evacuating passageway 30, restrict the material in the first cushion chamber 22 and continue to expand, restrict the material in casing 10 and upper housing 11 cavity and the first cushion chamber 22 and continue to expand under the restriction, form the restriction, reach explosion-proof, multiple exorbitant mesh of preventing.

The utility model discloses a theory of operation: the boss 13 on the wall surface of the upper shell 11 is squeezed into the recess on the wall surface of the insulating layer 12 to realize the clamping connection of the upper shell 11 and the insulating layer 12, electrode plates of the battery cell are respectively attached to the upper shell 11 and the lower shell 10 to form a positive electrode and a negative electrode, when the battery cell is extruded, deformed and exploded, the internal pressure of a cavity formed by the lower shell 10 and the upper shell 11 is increased, expanded gas and materials push the extrusion partition 21, the weak part of the partition 21 can be deformed until the partition 21 is broken due to the arrangement of the concave 24 and the deformation cavity 25, the repulsive force between the upper shell 11 and the lower shell 10 is slowed down, the explosion limit in the cavity is reduced, the volume expansion caused by partial explosion is absorbed, the primary explosion prevention is realized, when the expanded materials and the gas burst partition 21 enter the first buffer cavity 22, and when the materials and the gas in the first buffer cavity 22 enter the second buffer cavity 23, in material and gas got into second cushion chamber 23 from evacuation passageway 30, when evacuation passageway 30, form backward flow passageway 32 through a plurality of partitions 31, the material need be through the passageway that the opening from bottom to top that backward flow passageway 32 formed was gradually received, the material can receive certain resistance when getting into in the second cushion chamber 23, but can not prevent material entering in the first cushion chamber 22 completely and get into in the second cushion chamber 23, the material that gets into in the second cushion chamber 23 promotes the volume expansion that sealing 20 deformation buffering explosion led to, and simultaneously, the material can produce the reaction force because of the resistance when passing evacuation passageway 30, restrict the material in the first cushion chamber 22 and continue to expand, the restriction is down the material in casing 10 and the last casing 11 cavity and the first cushion chamber 22 and continues to expand.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides an explosion-proof button cell, includes casing (10) down, with casing (10) fixed connection's insulating layer (12) down, with last casing (11) of insulating layer (12) joint, the wall of going up casing (11) forms boss (13), and the internal face of insulating layer (12) forms the sunken of lining up, and the intracavity of casing (10) down is provided with electric core, its characterized in that: go up the wall of casing (11) and set up buffer, buffer includes sealing (20), cuts off (21), first cushion chamber (22), second cushion chamber (23), indent (24) and deformation chamber (25), cut off (21) and last casing (11) fixed connection, go up the top surface formation sealing (20) of casing (11), form second cushion chamber (23) between sealing (20) and last casing (11), cut off (21) and last casing (11) between the top surface form first cushion chamber (22), first cushion chamber (22) and second cushion chamber (23) communicate each other, cut off the wall of (21) and offer indent (24) and deformation chamber (25).

2. An explosion-proof button cell as defined in claim 1, which is characterized in that: the upper shell (11) is a cylinder with a closed upper end, a metal circular plate is separated (21), the separated (21) is fixedly connected with the inner wall surface of the upper shell (11), the sealing part (20) and the upper shell (11) are integrally formed, and the sealing part (20) is in a circular truncated cone shape.

3. An explosion-proof button cell as defined in claim 2, which is characterized in that: the deformation cavity (25) is formed in the top surface and the bottom surface of the partition (21) at equal intervals, and the indent (24) is formed in the center of the bottom surface of the partition (21).

4. An explosion-proof button cell as defined in claim 3, which is characterized in that: the deformation chamber (25) is the circular port, and deformation chamber (25) of wall (21) top surface are the annular array and distribute, and the deformation chamber (25) of wall (21) top surface all with increase progressively towards the centre of a circle direction degree of depth of wall (21) from the circumference of wall (21), and deformation chamber (25) of wall (21) bottom surface and deformation chamber (25) of wall (21) top surface are misplaced each other and are seted up.

5. An explosion-proof button cell as defined in claim 1, which is characterized in that: the buffer part further comprises an evacuation channel (30), partition parts (31) and a backflow channel (32), the evacuation channel (30) is formed in the wall surface of the upper shell (11), the first buffer cavity (22) and the second buffer cavity (23) are connected with each other through the evacuation channel (30), a plurality of partition parts (31) are arranged in the evacuation channel (30), and the backflow channel (32) is formed between the partition parts (31).

6. An explosion-proof button cell as defined in claim 5, wherein: the top surface of last casing (11) is seted up in evacuation passageway (30), and evacuation passageway (30) are hopper-shaped, and interval portion (31) and last casing (11) internal wall fixed connection.

7. An explosion-proof button cell as defined in claim 5, wherein: the separating parts (31) are annular plates, a plurality of separating parts (31) are arranged in the evacuation channel (30) at equal intervals from top to bottom, the diameters of the central holes of the separating parts (31) are decreased progressively from top to bottom, and the central holes of the separating parts (31) form a backflow channel (32) together.