CN211376776U

CN211376776U - Battery with explosion-proof function

Info

Publication number: CN211376776U
Application number: CN201922497389.6U
Authority: CN
Inventors: 童焰; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-28
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a battery with explosion-proof function through setting up top shell external member, drain pan and electric core external member. In the practical application process, because be provided with one-level annular glue film on the sheetmetal, be provided with second grade annular glue film on the annular steel sheet, when the inside atmospheric pressure of the battery that has explosion-proof function was too high, the one-level annular glue film that sets up on the sheetmetal and the second grade annular glue film that sets up on the annular steel sheet can be peeled off, one-level annular glue film and second grade annular glue film looks alternate segregation promptly, the too big interior pressure of battery that has explosion-proof function will be released, realize independently releasing pressure, prevent effectively that the battery that leads to having explosion-proof function because of the too big unable timely release of the pressure of the battery inside that has explosion-proof function from damaging, the security performance of the battery that has explosion-proof function has been.

Description

Battery with explosion-proof function

Technical Field

The utility model relates to a battery technology field especially relates to a battery with explosion-proof function.

Background

Currently, a battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electric current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries generally refer to small devices that can generate electrical energy. Such as a solar cell. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.

The safety performance of existing batteries remains questionable, and battery manufacturers generally do not have much consideration for the structure of the battery due to the small size of most batteries. However, it is known that, in order to realize discharge of a battery, an electrolyte is required in the battery, the electrolyte is in a liquid state and has active chemical properties, and if the electrolyte leaks or splashes from the inside of the battery, the electrolyte has a great potential safety hazard to the environment and people around the battery. The inside of battery can have certain pressure, if the inside pressure of battery is too big and can't carry out the pressure release, the battery will have very potential safety hazard, very probably leads to splashing out from the battery inside of electrolyte when serious, consequently, the safe explosion-proof one of the important index that judges battery safety performance of battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing one kind and can preventing inside atmospheric pressure too big, can independently release pressure when inside atmospheric pressure is too big, the higher battery that has explosion-proof function of security performance.

The purpose of the utility model is realized through the following technical scheme:

a battery having an explosion-proof function, comprising:

the top shell kit comprises a metal sheet, a primary annular adhesive layer, a secondary annular adhesive layer and an annular steel sheet, wherein the primary annular adhesive layer is arranged on the metal sheet, the secondary annular adhesive layer is arranged on the annular steel sheet, and the primary annular adhesive layer is connected with the secondary annular adhesive layer;

the battery cell accommodating cavity is formed in the bottom shell, and the annular steel sheet is arranged on the bottom shell; and

the battery core external member, the battery core external member includes naked electric core, first utmost point ear and second utmost point ear, naked electric core set up in electric core holding intracavity, first utmost point ear respectively with the sheetmetal with naked electric core is connected, the second utmost point ear respectively with the drain pan with naked electric core is connected.

In one of them embodiment, naked electric core is the naked electric core of coiling formula.

In one embodiment, the bare cell is a laminated bare cell.

In one embodiment, a step annular groove is formed in the annular steel sheet, and the secondary annular glue layer is arranged in the step annular groove.

In one embodiment, the cell kit further includes a first insulating member, and the first insulating member is disposed between the first tab and the bare cell.

In one embodiment, the cell kit further includes a second insulating member, and the second insulating member is disposed between the second tab and the bare cell.

In one embodiment, the primary annular glue layer is a PP plastic primary annular glue layer.

In one embodiment, the melting point of the primary annular glue layer is 100 ℃ to 500 ℃.

In one embodiment, the two-stage annular glue layer is a PP plastic two-stage annular glue layer.

In one embodiment, the melting point of the secondary annular glue layer is 100 ℃ to 500 ℃.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an assembly structure of a battery having an explosion-proof function according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a battery having an explosion-proof function according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is a schematic structural view of an annular steel sheet according to another embodiment of the present invention;

fig. 5 is an exploded view of a battery having an explosion-proof function according to another embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, a battery with an explosion-proof function includes a top case set, a bottom case, and a cell set. The top shell external member comprises a metal sheet, a primary annular adhesive layer, a secondary annular adhesive layer and an annular steel sheet, wherein the primary annular adhesive layer is arranged on the metal sheet, the secondary annular adhesive layer is arranged on the annular steel sheet, and the primary annular adhesive layer is connected with the secondary annular adhesive layer; a cell holding cavity is formed in the bottom shell, and the annular steel sheet is arranged on the bottom shell; the electric core external member includes naked electric core, first utmost point ear and second utmost point ear, and naked electric core sets up in electric core holding intracavity, and first utmost point ear is connected with sheetmetal and naked electric core respectively, and the second utmost point ear is connected with drain pan and naked electric core respectively. So, it should be noted that, because be provided with one-level annular glue film on the metal sheet, be provided with second grade annular glue film on the annular steel sheet, when the inside atmospheric pressure of the battery that has explosion-proof function was too high, the one-level annular glue film that sets up on the metal sheet and the second grade annular glue film that sets up on the annular steel sheet can be peeled off, promptly one-level annular glue film and second grade annular glue film alternate segregation, the too big interior pressure of battery that has explosion-proof function will be released, realize independently the pressure release, prevent effectively that the battery that has explosion-proof function from damaging because of the too big unable timely release of the inside pressure of battery that has explosion-proof function, the security performance of the battery that has explosion-proof function has been strengthened.

For better explaining the specific principle of the battery with explosion-proof function of the present application, please refer to fig. 1 and fig. 2 together, a battery 10 with explosion-proof function includes a top case assembly 100, a bottom case 200 and a cell assembly 300.

Thus, it should be noted that both top case assembly 100 and bottom case 200 serve as a package and protection; the battery cell suite 300 is used for storing electric energy, and when the battery 10 with the explosion-proof function is connected to an external electric device, the battery cell suite 300 transmits the stored electric energy to the external electric device, so that the external electric device can work normally.

Referring to fig. 1, 2 and 5, the top case assembly 100 includes a metal sheet 110, a first annular adhesive layer 120, a second annular adhesive layer 130 and an annular steel sheet 140, wherein the first annular adhesive layer 120 is disposed on the metal sheet 110, the second annular adhesive layer 130 is disposed on the annular steel sheet 140, and the first annular adhesive layer 120 is connected to the second annular adhesive layer 130.

Therefore, it should be noted that, because the first-stage annular rubber layer 120 is arranged on the metal sheet 110, the second-stage annular rubber layer 130 is arranged on the annular steel sheet 140, when the internal air pressure of the battery with the explosion-proof function is too high, the first-stage annular rubber layer 120 arranged on the metal sheet and the second-stage annular rubber layer 130 arranged on the annular steel sheet 140 can be peeled off, that is, the first-stage annular rubber layer 120 and the second-stage annular rubber layer 130 are separated from each other, the too large internal pressure of the battery 10 with the explosion-proof function can be released, so that the autonomous pressure relief is realized, the damage of the battery 10 with the explosion-proof function caused by the too large internal pressure of the battery 10 with the explosion-proof function which can not be released in time is effectively prevented, and.

Referring to fig. 2, a cell accommodating cavity is formed in the bottom case 200, and the annular steel sheet 140 is disposed on the bottom case 200.

Thus, it should be noted that the bottom case 200 plays a role in packaging and protecting; the cell holding cavity is used for placing the cell kit 300.

Referring to fig. 2, the battery cell kit 300 includes a bare battery cell 310, a first tab 320 and a second tab 330, the bare battery cell 310 is disposed in the battery cell accommodating cavity, the first tab 320 is connected to the metal sheet 110 and the bare battery cell 310, and the second tab 330 is connected to the bottom case 200 and the bare battery cell 310.

Thus, it should be noted that the bare cell 310 is used for storing electric energy; the first tab 320 and the second tab 330 serve as electrodes of the battery 10 having an explosion-proof function, and are used for connecting external electric devices to supply power to the external electric devices.

It should be further noted that, when the battery 10 with the explosion-proof function needs to be assembled, the first-stage annular adhesive layer 120 is thermally welded to the metal sheet 110, the second-stage annular adhesive layer 130 is thermally welded to the annular steel sheet 140, the annular steel sheet 140 is welded to the bottom case 200, the battery cell kit 300 is placed in the battery cell accommodating cavity, electrolyte is injected into the battery cell accommodating cavity, the first-stage annular adhesive layer 120 is aligned to the second-stage annular adhesive layer 130, that is, the first-stage annular adhesive layer 120 is in contact with the second-stage annular adhesive layer 130, the first-stage annular adhesive layer 120 and the second-stage annular adhesive layer 130 are sealed by heating, and finally the first tab 320 is connected to the metal sheet 110 and the second tab 330 is connected to the bottom case 200 by resistance welding, so that the assembly process of the battery 10 with the explosion-proof function is.

Specifically, the primary annular glue layer 120 is a PP plastic primary annular glue layer, and the melting point of the primary annular glue layer 120 is 100-500 ℃; the second-level annular glue layer 130 is a PP plastic second-level annular glue layer, and the melting point of the second-level annular glue layer 130 is 100-500 ℃. Therefore, it should be noted that the specific manufacturing materials of the first-stage annular adhesive layer 120 and the second-stage annular adhesive layer 130 can be flexibly selected according to actual conditions, and the melting point of the first-stage annular adhesive layer 120 is also the same as the melting point of the second-stage annular adhesive layer 130.

Further, in an embodiment, the bare cell 310 is a winding bare cell.

So, what need explain is that naked electric core 310 is the naked electric core of coiling formula, and the concrete structure is positive plate, diaphragm and negative pole piece, and positive plate, diaphragm and negative pole piece pile up the winding of office in proper order and form the naked electric core of coiling formula.

Further, in an embodiment, the bare cell 310 is a laminated bare cell.

So, it should be explained that naked electric core 310 still can adopt the naked electric core of lamination formula, and concrete structure is a plurality of positive plates, a plurality of diaphragms and a plurality of negative pole pieces, and a plurality of positive plates, a plurality of diaphragms and a plurality of negative pole pieces pile up crisscross setting in order and form the naked electric core of lamination formula.

Further, referring to fig. 4, in an embodiment, a stepped annular groove 141 is formed on the annular steel sheet 140, and the secondary annular glue layer 130 is disposed in the stepped annular groove 141.

In this way, it should be noted that, the step annular groove 141 is provided to make the overall structure of the battery 10 with the explosion-proof function more compact, so that the battery 10 with the explosion-proof function occupies a smaller space area, and the space utilization rate of the battery 10 with the explosion-proof function is improved.

Further, in an embodiment, the cell kit 300 further includes a first insulating member, and the first insulating member is disposed between the first tab 320 and the bare cell 310.

Therefore, it should be noted that the first insulating member is arranged to perform an isolating function, so as to prevent the first tab 320 from contacting the bare cell 310 to cause a short circuit; in addition, the first insulating piece can also play a thermal insulation role, and the naked electric core 310 is prevented from being damaged by heat generated when the first pole lug 320 is welded.

Further, in an embodiment, the cell kit 300 further includes a second insulating member, and the second insulating member is disposed between the second electrode tab 330 and the bare cell 310.

Therefore, it should be noted that the second insulating member is arranged to perform an isolation function, so as to prevent the second tab 330 from contacting the bare cell 310 to cause a short circuit; in addition, the second insulating member can also play a role in heat insulation, and heat generated when the second pole lug 330 is welded is prevented from damaging the bare cell 310.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A battery having an explosion-proof function, characterized by comprising:

2. The battery with the explosion-proof function of claim 1, wherein the bare cell is a wound bare cell.

3. The battery with the explosion-proof function of claim 1, wherein the bare cell is a laminated bare cell.

4. The battery with the explosion-proof function as recited in claim 1, wherein a step annular groove is formed in the annular steel sheet, and the secondary annular glue layer is disposed in the step annular groove.

5. The battery with an explosion-proof function of claim 1, wherein the cell kit further comprises a first insulating member, and the first insulating member is disposed between the first tab and the bare cell.

6. The battery with the explosion-proof function of claim 1, wherein the cell kit further comprises a second insulating member, and the second insulating member is disposed between the second tab and the bare cell.

7. The battery with the explosion-proof function as recited in claim 1, wherein the primary annular glue layer is a PP plastic primary annular glue layer.

8. The battery with the explosion-proof function as recited in claim 7, wherein the melting point of the primary annular glue layer is 100 ℃ to 500 ℃.

9. The battery with the explosion-proof function as recited in claim 1, wherein the secondary annular glue layer is a PP plastic secondary annular glue layer.

10. The battery with the explosion-proof function as recited in claim 9, wherein the melting point of the secondary annular glue layer is 100 ℃ to 500 ℃.