CN110970580A - Button cell and manufacturing method thereof - Google Patents
Button cell and manufacturing method thereof Download PDFInfo
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- CN110970580A CN110970580A CN201911066931.0A CN201911066931A CN110970580A CN 110970580 A CN110970580 A CN 110970580A CN 201911066931 A CN201911066931 A CN 201911066931A CN 110970580 A CN110970580 A CN 110970580A
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- electrode
- button cell
- sealing body
- shell
- out hole
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 87
- 239000004020 conductor Substances 0.000 claims abstract description 60
- 238000002955 isolation Methods 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 239000003792 electrolyte Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000009987 spinning Methods 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention relates to a button cell and a manufacturing method thereof, wherein the button cell comprises a shell and an electrode isolation assembly arranged in the shell, wherein the electrode isolation assembly comprises at least one positive electrode and at least one negative electrode; the housing includes a wall portion, at least one protrusion protruding from a surface of the wall portion toward or away from the electrode separator assembly, and at least one lead-out hole penetrating the wall portion and the at least one protrusion, respectively; the button cell further comprises at least one electric conductor arranged in the at least one leading-out hole respectively, and at least one insulating sealing body arranged between the hole wall of the at least one leading-out hole and the at least one electric conductor respectively, wherein the at least one electric conductor is electrically connected with the at least one positive electrode or the at least one negative electrode. The positive electrode and the negative electrode of the button cell can be positioned on the same side through the electric conductor arranged on the wall part, so that the space utilization rate is improved; the insulating sealing body is in interference fit with the lead-out hole, so that the insulating sealing body is fixed and the lead-out hole is sealed.
Description
Technical Field
The invention relates to a battery, in particular to a button battery and a manufacturing method thereof.
Background
Button cells of the related art generally comprise a housing consisting of two electrically conductive housing halves, a lower housing and an upper housing. Generally, the lower case has a positive polarity, the upper case has a negative polarity, and the positive and negative electrodes are located at both ends of the button cell. When the circuit board is required to be installed in some application occasions, the positive electrode interface and the negative electrode interface of the circuit board are respectively required to be electrically connected with the positive electrode and the negative electrode of the button cell, so that the negative electrode interface of the circuit board is led out from the upper shell, the positive electrode interface is led out from the lower shell and is wound above the upper shell along the shell, and the space utilization rate is low.
Disclosure of Invention
The present invention is directed to an improved button cell and a method for manufacturing the same, which address the above-mentioned shortcomings of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a button cell comprising a housing and an electrode separator assembly disposed within the housing, the electrode separator assembly comprising at least one positive electrode and at least one negative electrode; wherein the housing comprises a wall portion, at least one protrusion protruding from a surface of the wall portion toward or away from the electrode separator assembly, and at least one lead-out hole penetrating through the wall portion and the at least one protrusion, respectively;
the button cell further comprises at least one conductor which is respectively arranged in the at least one leading-out hole, and at least one insulating sealing body which is respectively arranged between the hole wall of the at least one leading-out hole and the at least one conductor and separates the at least one conductor from the wall part, wherein the at least one conductor is electrically connected with the at least one positive electrode or the at least one negative electrode.
In some embodiments, each of the protrusions is deformed inwardly to form a compression to compress and lock the at least one insulation seal.
In some embodiments, the housing includes a lower shell with an opening at the top and a matching upper shell, the upper shell and the lower shell are made of metal material, and the wall portion is formed on the upper shell.
In some embodiments, the upper housing is electrically connected to one of the at least one positive electrode and the at least one negative electrode, and the at least one electrical conductor is electrically connected to the other of the at least one positive electrode and the at least one negative electrode.
In some embodiments, the button cell includes at least two electrical conductors electrically connected to the at least one positive electrode and the at least one negative electrode, respectively, and at least two insulating seals.
In some embodiments, the at least one protrusion is stretch-formed from the wall portion toward or away from a side of the electrode separator assembly, respectively;
the peripheral edge of the wall portion is hermetically joined to the opening edge of the lower case by laser welding.
In some embodiments, an end of each of the protrusions remote from the wall portion is inwardly spun to form the pressing portion;
the angle α between the squeeze portion and the protrusion is 90 ° < α <180 °.
In some embodiments, an end of the at least one insulating seal corresponding to the extrusion extends beyond the extrusion.
The invention also provides a button cell manufacturing method, which comprises the following steps:
s1, providing a lower shell, and arranging the electrode separation component in the lower shell;
s2, providing an upper shell formed with a wall portion, at least one protrusion and at least one lead-out hole, wherein the at least one protrusion is arranged on one side of the wall portion facing away from the electrode isolation assembly;
s3, laser welding the peripheral edge of the wall portion to the lower case to form a case;
s4, injecting electrolyte into the shell through the lead-out hole;
s5, respectively plugging at least one insulating sealing body into the at least one lead-out hole, and respectively penetrating at least one electric conductor through the at least one insulating sealing body;
and S6, respectively forming pressing parts by inwards spinning one ends of the at least one protruding parts far away from the wall parts so as to lock the at least one insulating sealing body.
The invention also provides a button cell manufacturing method, which comprises the following steps:
s1, providing a lower shell, and arranging the electrode separation component in the lower shell;
s2, providing an upper shell formed with a wall part, at least one protruding part, at least one extraction hole and a liquid injection hole, wherein the at least one protruding part is arranged on one side of the wall part facing the electrode isolation component;
s3, respectively plugging at least one insulating sealing body into the at least one lead-out hole, and respectively penetrating at least one electric conductor through the at least one insulating sealing body;
s4, respectively forming a pressing part by inwards spinning one end of the at least one protruding part far away from the wall part so as to lock the at least one insulating sealing body;
s5, laser welding the peripheral edge of the wall portion to the lower case to form a case;
and S6, injecting electrolyte into the shell through the injection hole, and sealing the injection hole after injection is completed.
The implementation of the invention has at least the following beneficial effects: the positive electrode and the negative electrode of the button cell can be positioned on the same side of the shell through the electric conductor arranged on the wall part, so that the space utilization rate is improved; the insulating sealing body is in interference fit with the lead-out hole, so that the insulating sealing body is fixed and the lead-out hole is sealed.
In addition, the protruding portion is deformed inwards to form the extruding portion to lock the insulating sealing body, so that an additional fixing piece is not needed to fix the insulating sealing body, the locking and fixing mode is simple and reliable, the processing and manufacturing process is simple, and the space utilization rate is high.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic longitudinal sectional view of a button cell according to a first embodiment of the present invention;
FIG. 2 is a schematic longitudinal sectional view of a button cell according to a second embodiment of the present invention;
fig. 3 is a schematic longitudinal sectional view of a button cell according to a third embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This 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 is to be understood that the terms "inner," "outer," "upper," "lower," "top," "bottom," and the like are used in an illustrative or positional relationship based on the orientation or positional relationship shown in the drawings or otherwise customary for use of the product of the invention, and are used merely for convenience in describing and simplifying the invention, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is not to be considered as limiting. Furthermore, the terms "vertical," "horizontal," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
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.
Fig. 1 shows a button cell according to a first exemplary embodiment of the invention, which can be a solid-state, semi-solid or liquid-state cell, comprising a sealed housing 1, an electrode isolation assembly 2, an insulating seal 3 and an electrical conductor 4. The housing 1 includes a lower case 12 having an opening at the top and an upper case 11 which is electrically conductive and is fitted thereto. The upper case 11 includes a wall portion 114, a protruding portion 111 protruding from a surface of the wall portion 114 away from the electrode separator assembly 2, and a lead-out hole 113 penetrating the wall portion 114 and the protruding portion 111, and a central axis of the lead-out hole 113 may coincide with a central axis of the protruding portion 111. The conductor 4 is longitudinally arranged in the lead-out hole 113, and the insulating sealing body 3 is arranged between the wall of the lead-out hole 113 and the conductor 4 so as to insulate and separate the upper shell 11 and the conductor 4. The protruding portion 111 is deformed inward to form a pressing portion 112 to lock the insulating sealing body 3. It is to be understood that the number of the lead-out holes 113, the insulating sealing body 3, and the electric conductors 4 is not limited to one, and two or more may be applied.
The electrode isolation assembly 2 is disposed in the housing 1 and includes at least one positive electrode 21, at least one negative electrode 22 and an isolation 23 between the positive electrode 21 and the negative electrode 22, wherein the positive electrode 21 is electrically connected to the upper case 11, and the negative electrode 22 is electrically connected to the conductive body 4. It is understood that in other embodiments, the negative electrode 22 may be electrically connected to the upper case 11, and the positive electrode 21 may be electrically connected to the conductor 4.
Electrode separator assembly 2 may take the form of a spiral winding or may take the form of a lamination stack. In the embodiment shown in fig. 1, the electrode separator assembly 2 takes the form of a helical winding, and wherein the axis coincides with the central axis of the housing 1. The electrode isolation assembly 2 may also include a receiving space 24 in some embodiments, and a central axis of the receiving space 24 may coincide with a central axis of the electrode isolation assembly 2. After the electrode separator assembly 2 is wound, the winding core is withdrawn to form an axial cavity defining the receiving space 24.
The electric conductor 4 is longitudinally inserted into the insulating sealing body 3, and both ends thereof are exposed from both ends of the insulating sealing body 3, respectively. The conductor 4 may be longitudinally inserted into the receiving space 24, the lower end of the conductor 4 may extend to near the bottom of the receiving space 24 to be connected to the lower end of the negative electrode 22, and the lower end of the conductor 4 may be spaced apart from the bottom wall of the lower case 12 to be insulated from the lower case 12.
The conductor 4 can be made of rigid conductive material to enhance the pressure resistance; alternatively, the conductive body 4 may be made of a flexible conductive material, so that the conductive body 4 can be directly connected to an electronic component such as a circuit board or a load without an additional soldering lead.
As further shown in fig. 1, the casing 1 may be substantially in the shape of an oblate cylinder in some embodiments, that is, the diameter of the button cell is greater than the height thereof, the thickness of the casing 1 may be 0.1-1mm, and the diameter of the casing 1 (the diameter of the button cell) may be 6mm or more. Both the lower case 12 and the upper case 11 may be made of a metal material, such as stainless steel, aluminum, iron, or other laser weldable material. The lower shell 12 may be cylindrical with an opening at the top in some embodiments, and may include a circular bottom wall 121 and a cylindrical sidewall 122 surrounding the circumference of the circular bottom wall 121 and perpendicular to the bottom wall 121. The wall portion 114 may be formed in a circular flat plate shape to cover the top opening of the lower case 12, the peripheral edge of the wall portion 114 may be hermetically joined to the opening edge of the lower case 12 by laser welding, and the protruding portion 111 may be stretch-formed from the wall portion 114 to the side away from the electrode separator assembly 2.
The sealing plug of the insulating sealing body 3 is arranged in the leading-out hole 113, and can be made of flexible insulating materials such as silica gel and rubber, and the sealing performance is better. The diameter of the insulating sealing body 3 is larger than the aperture of the leading-out hole 113, so that the insulating sealing body 3 is in interference fit with the leading-out hole 113, the sealing performance is better, and the insulating sealing body 3 can be fixed through the interference fit. The diameter of the extraction hole 113 may be 4mm or less. Preferably, the diameter of the lead-out hole 113 may be approximately 5% -35% of the diameter of the housing 1.
In the present embodiment, the protruding portion 111 and the leading-out hole 113 are located at the middle position of the wall portion 114, and the central axis thereof may coincide with or have a certain angle with the central axis of the housing 1. In other embodiments, the protruding portion 111 and the leading-out hole 113 may also be located at other positions of the wall portion 114, for example, near the periphery of the wall portion 114, and the central axes of the protruding portion 111 and the leading-out hole 113 may also be parallel to the central axis of the housing 1 or inclined at a certain angle, which may be designed according to actual requirements. In some embodiments, the included angle between the protrusion 111 and the wall 114 may be 30-150.
In some embodiments, the pressing portion 112 may be formed by spinning the end of the protrusion 111 away from the wall portion 114 inward to facilitate manufacturing. After the pressing portion 112 is spun inwards, the pressing portion presses the insulating sealing body 3 to generate elastic deformation, so that the insulating sealing body 3 is locked and fixed in the leading-out hole 113, and falling off is avoided. The locking and fixing mode has the advantages of simple structure, reliable locking, simple process and manufacture and the like, and an additional fixing piece is not required to be arranged to fix the insulating sealing body 3, so that the space utilization rate is higher.
The two ends of the insulating sealing body 3 can respectively extend out of the leading-out holes 113, the overall height of the insulating sealing body 3 can be 0.5-5mm, and the heights of the two ends extending out of the leading-out holes 113 can be respectively less than 1 mm. Because the diameter of the insulating sealing body 3 is larger than the aperture of the leading-out hole 113, the part of the insulating sealing body 3 positioned in the leading-out hole 113 is extruded and contracted, and the parts of the two ends of the insulating sealing body 3 extending out of the leading-out hole 113 expand and reset, so that the sizes of the extending parts of the two ends are larger than that of the leading-out hole 113, and the sealing effect and the locking effect are further improved. In addition, one end of the insulating sealing body 3 corresponding to the extrusion part 112 extends out of the extrusion part 112, and the end part of the extrusion part 112 can be embedded into the insulating sealing body 3, so that the locking effect is better.
The protruding portion 111 may be a vertical cylinder, the extruding portion 112 may be a circular truncated cone, and the included angle α between the extruding portion 112 and the protruding portion 111 is an obtuse angle, i.e. 90 ° < α <180 °, which facilitates the spin forming and locking of the insulating sealing body 3, in some embodiments, the included angle α between the extruding portion 112 and the protruding portion 111 may be 120 ° -160 °, within which a good locking effect is ensured.
When this external circuit board of button cell, can correspond protruding portion 111 on the circuit board and seted up and dodge the hole, peg graft each other with protruding portion 111 through this dodge the hole to effectively combine with the circuit board space, promote electric core energy density, in addition, still can be convenient for the installation and the location of circuit board.
This draw-out hole 113 still can be used to annotate the electrolyte into in the casing 1, annotates the liquid through drawing-out hole 113 and accomplish the back, fill in the insulating seal body 3 and seal can to need not additionally to set up and annotate the liquid hole. In another embodiment, a single liquid injection hole (not shown) may be formed in the wall portion 114 for injecting the electrolyte into the casing 1. The button cell can also comprise a plugging piece (not shown) for plugging the liquid injection hole after the liquid injection is finished.
When the button cell is manufactured, the following steps can be adopted:
s1, providing a lower case 12, and disposing the electrode separator assembly 2 in the lower case 12;
s2, providing the upper case 11 formed with the wall portion 114, the protruding portion 111, and the lead-out hole 113;
s3, laser welding the peripheral edge of wall 114 to lower case 12 to form case 1;
s4, injecting electrolyte into the case 1 through the lead-out hole 113;
s5, plugging the insulating sealing body 3 into the lead-out hole 113, and penetrating the electric conductor 4 through the insulating sealing body 3;
s6, the end of the protruding part 111 away from the wall part 114 is spun inward to form the pressing part 112 to lock the insulating sealing body 3.
Fig. 2 shows a button cell according to a second exemplary embodiment of the invention, which can be a solid-state, semi-solid or liquid-state cell, comprising a sealed housing 1, an electrode isolation assembly 2, an insulating seal 3 and an electrical conductor 4. The housing 1 includes a lower case 12 having an opening at the top and an upper case 11 which is electrically conductive and is fitted thereto. The upper case 11 includes a wall portion 114, a projection 111 projecting from the surface of the wall portion 114 toward the electrode separator assembly 2, a lead-out hole 113 penetrating the wall portion 114 and the projection 111, a liquid inlet 115 penetrating the wall portion 114 for injecting an electrolyte into the case 1, and a sealing member 5 provided in the liquid inlet 115 for sealing the liquid inlet 115. The conductor 4 is longitudinally arranged in the lead-out hole 113, and the insulating sealing body 3 is arranged between the wall of the lead-out hole 113 and the conductor 4 so as to insulate and separate the upper shell 11 and the conductor 4. The protruding portion 111 is deformed inward to form a pressing portion 112 to lock the insulating sealing body 3. It is to be understood that the number of the lead-out holes 113, the insulating sealing body 3, and the electric conductors 4 is not limited to one, and two or more may be applied.
The electrode isolation assembly 2 is disposed in the housing 1 and includes at least one positive electrode 21, at least one negative electrode 22 and an isolation 23 between the positive electrode 21 and the negative electrode 22, wherein the positive electrode 21 is electrically connected to the upper case 11, and the negative electrode 22 is electrically connected to the conductive body 4. It is understood that in other embodiments, the negative electrode 22 may be electrically connected to the upper case 11, and the positive electrode 21 may be electrically connected to the conductor 4.
Electrode separator assembly 2 may take the form of a spiral winding or may take the form of a lamination stack. In the embodiment shown in fig. 2, the electrode separator assembly 2 takes the form of a helical winding, and wherein the axis coincides with the central axis of the housing 1. The electrode separator assembly 2 may further include a receiving space 24 in some embodiments, and the protrusion 111 and the pressing portion 112 protrude into the receiving space 24. The central axis of the receiving space 24 may coincide with the central axis of the electrode isolation assembly 2. After the electrode separator assembly 2 is wound, the winding core is withdrawn to form an axial cavity defining the receiving space 24. The protruding part 111 and the pressing part 112 extend into the axial cavity, so that the space utilization rate of the button cell can be improved. Further, since the protruding portion 111 and the pressing portion 112 are located below the top surface of the wall portion 114, when an electronic component such as an external circuit board is required, the mounting position of the electronic component such as the circuit board is not limited, and the versatility is higher.
The electric conductor 4 is longitudinally inserted into the insulating sealing body 3, and both ends thereof are exposed from both ends of the insulating sealing body 3, respectively. The conductor 4 may be longitudinally inserted into the receiving space 24, the lower end of the conductor 4 may extend to near the bottom of the receiving space 24 to be connected to the lower end of the negative electrode 22, and the lower end of the conductor 4 may be spaced apart from the bottom wall of the lower case 12 to be insulated from the lower case 12.
The conductor 4 can be made of rigid conductive material to enhance the pressure resistance; alternatively, the conductive body 4 may be made of a flexible conductive material, so that the conductive body 4 can be directly connected to an electronic component such as a circuit board or a load without an additional soldering lead.
As further shown in fig. 2, the housing 1 may have an oblate cylindrical shape in some embodiments, and both the lower shell 12 and the upper shell 11 may be made of a metal material, such as stainless steel, aluminum, iron, or other metal material that can be laser welded. The lower case 12 may have a cylindrical shape with an opening at the top in some embodiments, the wall portion 114 may have a flat plate shape to cover the top opening of the lower case 12, and the peripheral edge of the wall portion 114 may be hermetically joined to the open edge of the lower case 12 by laser welding.
The sealing plug of the insulating sealing body 3 is arranged in the leading-out hole 113, and can be made of flexible insulating materials such as silica gel and rubber, and the sealing performance is better. In the present embodiment, the protruding portion 111 and the lead-out hole 113 are located at the middle position of the wall portion 114, and the protruding portion 111 may be formed by stretching from the middle position of the wall portion 114 to the side facing the electrode separator assembly 2. The central axes of the protruding portion 111 and the leading-out hole 113 may coincide with the central axis of the housing 1, or the central axes of the protruding portion 111 and the leading-out hole 113 may have a certain included angle with the central axis of the housing 1. In other embodiments, the protrusion 111 and the lead-out hole 113 may be located at other positions of the wall portion 114, for example, they may be located near the periphery of the wall portion 114.
In some embodiments, the pressing portion 112 may be formed by spinning the end of the protrusion 111 away from the wall portion 114 inward to facilitate manufacturing. After the pressing portion 112 is spun inward, the insulating sealing body 3 is pressed to be elastically deformed, so that the insulating sealing body 3 is locked and fixed in the leading-out hole 113, and is prevented from falling off. The locking and fixing mode has the advantages of simple structure, reliable locking, simple process and manufacture and the like, and an additional fixing piece is not required to be arranged to fix the insulating sealing body 3, so that the space utilization rate is higher.
The two ends of the insulating sealing body 3 can respectively extend out of the leading-out holes 113, the included angle α between the pressing part 112 and the protruding part 111 is an obtuse angle, namely 90 degrees < α <180 degrees, so that the insulating sealing body 3 can be conveniently formed and locked by spinning, in some embodiments, the included angle α between the pressing part 112 and the protruding part 111 can be 120-160 degrees, and in this range, a good locking effect can be ensured.
The liquid injection hole 115 is used for injecting electrolyte into the casing 1, and after the liquid injection through the liquid injection hole 115 is completed, the plugging piece 5 is plugged to plug and seal the liquid injection hole 115.
When the button cell is manufactured, the following steps can be adopted:
s1, providing a lower case 12, and disposing the electrode separator assembly 2 in the lower case 12;
s2, providing the upper shell 11 with the wall part 114, the projection 111, the drawing hole 113 and the liquid injection hole 115;
s3, plugging the insulating sealing body 3 into the lead-out hole 113, and penetrating the electric conductor 4 through the insulating sealing body 3;
s4, forming a pressing part 112 by inwardly spinning one end of the protruding part 111 far away from the wall part 114 so as to lock the insulating sealing body 3;
s5, laser welding the peripheral edge of wall 114 to lower case 12 to form case 1;
and S6, injecting the electrolyte into the shell 1 through the injection hole 115, and plugging the injection hole 115 by the plugging piece 5 after the injection is finished.
Fig. 3 shows a button cell according to a third exemplary embodiment of the invention, which differs from the first exemplary embodiment mainly in that: the button battery comprises a sealed shell 1, an electrode isolation assembly 2, two insulating sealing bodies 3 and two electric conductors 4, wherein the two electric conductors 4 are respectively and electrically connected with a positive electrode 21 and a negative electrode 22 of the electrode isolation assembly 2.
In the present embodiment, the housing 1 includes a lower shell 12 having an opening at the top and an upper shell 11 matching with the lower shell 12, and the lower shell 12 and the upper shell 11 may be made of metal material such as stainless steel, aluminum, iron, etc. capable of laser welding, or made of plastic such as Peek, etc. capable of laser welding. The upper case 11 includes a wall portion 114, two protrusions 111 protruding from the surface of the wall portion 114 away from the electrode separator assembly 2, and two lead-out holes 113 penetrating the two protrusions 111 and the wall portion 114, respectively. The two conductors 4 are respectively arranged in the two lead-out holes 113 along the longitudinal direction, and the two insulating sealing bodies 3 are respectively arranged between the hole walls of the two lead-out holes 113 and the two conductors 4 so as to respectively isolate the two conductors 4 from the wall part 114. The two protrusions 111 are deformed inward to form pressing portions 112, respectively, to lock the two insulating sealing bodies 3. It is to be understood that the number of the protruding portion 111, the lead hole 113, the insulating sealing body 3, and the conductor 4 is not limited to two, and two or more may be applied. In other embodiments, the two protruding parts 111 may also be respectively disposed on different sides of the housing 1, i.e., the two protruding parts 111 may also be respectively formed on the upper shell 11 and the lower shell 12.
In the present embodiment, the two protruding portions 111 are respectively located near the periphery of the wall portion 114, and further, the two protruding portions 111 can be respectively symmetrically disposed on two opposite sides of the wall portion 114. In other embodiments, the two protrusions 111 may be located at other positions of the wall portion 114, for example, one of the protrusions 111 is located near the periphery of the wall portion 114, and the other is located at the middle of the wall portion 114.
The insulating sealing body 3 sealing plug is arranged in the lead-out hole 113 and is in interference fit with the lead-out hole 113. Both ends of the insulating sealing body 3 can be extended out of the lead-out holes 113, respectively. Because the diameter of the insulating sealing body 3 is larger than the aperture of the leading-out hole 113, the part of the insulating sealing body 3 positioned in the leading-out hole 113 is extruded and contracted, and the parts of the two ends of the insulating sealing body 3 extending out of the leading-out hole 113 expand and reset, so that the sizes of the extending parts of the two ends are larger than that of the leading-out hole 113, and the sealing effect and the locking effect are further improved. In addition, one end of the insulating sealing body 3 corresponding to the extrusion part 112 extends out of the extrusion part 112, and the end part of the extrusion part 112 can be embedded into the insulating sealing body 3, so that the locking effect is better. The end of the insulating sealing body 3 opposite to the electrode isolation assembly 2 extends out of the wall part 114, and a certain gap is formed between the insulating sealing body and the electrode isolation assembly 2, so that a space for temperature deformation of the electrode isolation assembly 2 is provided, short circuit caused by contact between the electrode isolation assembly 2 and the upper shell 11 can be avoided, and the safety is higher.
The electric conductor 4 vertically penetrates through the insulating sealing body 3, one end (upper end) of the electric conductor 4 departing from the electrode isolation assembly 2 can extend out of the insulating sealing body 3, and the other end (lower end) can be flush with the insulating sealing body 3 or extend out of the insulating sealing body 3. A certain gap is formed between the lower end of the conductor 4 and the electrode isolation component 2, and the lower end of the conductor 4 can be connected with the upper end of the electrode isolation component 2 through a lead.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A button cell comprises a shell (1) and an electrode isolation assembly (2) arranged in the shell (1), wherein the electrode isolation assembly (2) comprises at least one positive electrode (21) and at least one negative electrode (22); characterized in that the casing (1) comprises a wall portion (114), at least one protrusion (111) protruding from a surface of the wall portion (114) towards or away from the electrode isolation assembly (2), and at least one lead-out hole (113) passing through the wall portion (114) and the at least one protrusion (111), respectively;
the button cell further comprises at least one conductor (4) respectively arranged in the at least one leading-out hole (113), and at least one insulating sealing body (3) respectively arranged between the hole wall of the at least one leading-out hole (113) and the at least one conductor (4) and used for isolating the at least one conductor (4) from the wall part (114), wherein the at least one conductor (4) is electrically connected with the at least one positive electrode (21) or the at least one negative electrode (22).
2. Button cell according to claim 1, characterised in that each protrusion (111) is deformed inwardly to form a pressing (112) for pressing and locking the at least one insulating seal (3).
3. Button cell according to claim 2, wherein the case (1) comprises a lower case (12) having an opening at the top and a matching upper case (11), the upper case (11) and the lower case (12) are both made of metal material, and the wall portion (114) is formed on the upper case (11).
4. Button cell according to claim 3, wherein said upper shell (11) is electrically connected to one of said at least one positive electrode (21) and said at least one negative electrode (22), and said at least one electrical conductor (4) is electrically connected to the other of said at least one positive electrode (21) and said at least one negative electrode (22).
5. Button cell according to claim 2, characterised in that it comprises at least two electrical conductors (4) and at least two insulating seals (3), said at least two electrical conductors (4) being electrically connected to said at least one positive electrode (21) and said at least one negative electrode (22), respectively.
6. Button cell according to claim 3, wherein the at least one protrusion (111) is stretch-formed from the wall (114) towards the side facing towards or away from the electrode separator assembly (2);
the peripheral edge of the wall portion (114) is hermetically joined to the opening edge of the lower case (12) by laser welding.
7. Button cell according to any of claims 3 to 6, wherein the end of each protrusion (111) remote from the wall (114) is spun inwards to form the press (112);
the included angle α between the extrusion part (112) and the protrusion part (111) is 90%0<α<1800。
8. Button cell according to claim 7, wherein the ends of the at least one insulating seal (3) which correspond to the extruded sections (112) each project beyond the extruded sections (112).
9. A manufacturing method of a button cell is characterized by comprising the following steps:
s1, providing a lower shell (12), and arranging the electrode separation component (2) in the lower shell (12);
s2, providing an upper shell (11) formed with a wall portion (114), at least one protrusion (111) and at least one lead-out hole (113), the at least one protrusion (111) being arranged on a side of the wall portion (114) facing away from the electrode isolation assembly (2);
s3, laser welding the peripheral edge of the wall part (114) on the lower shell (12) to form a shell (1);
s4, injecting electrolyte into the shell (1) through the lead-out hole (113);
s5, respectively plugging at least one insulating sealing body (3) into the at least one lead-out hole (113), and respectively penetrating at least one electric conductor (4) through the at least one insulating sealing body (3);
and S6, respectively forming a pressing part (112) by inward spinning one end of the at least one protrusion part (111) far away from the wall part (114) so as to lock the at least one insulating sealing body (3).
10. A manufacturing method of a button cell is characterized by comprising the following steps:
s1, providing a lower shell (12), and arranging the electrode separation component (2) in the lower shell (12);
s2, providing an upper shell (11) formed with a wall part (114), at least one protruding part (111), at least one lead-out hole (113), and a liquid injection hole (115), wherein the at least one protruding part (111) is arranged on one side of the wall part (114) facing the electrode isolation component (2);
s3, respectively plugging at least one insulating sealing body (3) into the at least one lead-out hole (113), and respectively penetrating at least one electric conductor (4) through the at least one insulating sealing body (3);
s4, forming a pressing part (112) by respectively spinning inwards one end of the at least one protruding part (111) far away from the wall part (114) so as to lock the at least one insulating sealing body (3);
s5, laser welding the peripheral edge of the wall part (114) on the lower shell (12) to form a shell (1);
and S6, injecting electrolyte into the shell (1) through the injection hole (115), and sealing the injection hole (115) after injection is completed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066931.0A CN110970580A (en) | 2019-11-04 | 2019-11-04 | Button cell and manufacturing method thereof |
| PCT/CN2020/126562 WO2021088886A1 (en) | 2019-11-04 | 2020-11-04 | Button battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066931.0A CN110970580A (en) | 2019-11-04 | 2019-11-04 | Button cell and manufacturing method thereof |
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| CN110970580A true CN110970580A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911066931.0A Pending CN110970580A (en) | 2019-11-04 | 2019-11-04 | Button cell and manufacturing method thereof |
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| CN (1) | CN110970580A (en) |
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