CN111341967A - Production method of anti-seepage button battery and button battery manufactured by same - Google Patents
Production method of anti-seepage button battery and button battery manufactured by same Download PDFInfo
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- CN111341967A CN111341967A CN202010335485.5A CN202010335485A CN111341967A CN 111341967 A CN111341967 A CN 111341967A CN 202010335485 A CN202010335485 A CN 202010335485A CN 111341967 A CN111341967 A CN 111341967A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 106
- 239000002184 metal Substances 0.000 claims abstract description 106
- 238000003466 welding Methods 0.000 claims abstract description 66
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000002265 prevention Effects 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 7
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 31
- 238000009413 insulation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims 1
- 229910001416 lithium ion Inorganic materials 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 16
- 238000003825 pressing Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 1
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/216—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for button or coin cells
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- 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
- H01M50/183—Sealing members
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a production method of a liquid seepage prevention button battery and the button battery prepared by the same, wherein the button battery comprises a positive electrode shell, a negative electrode shell and a battery cell, the battery cell is mainly formed by laminating or winding a positive electrode plate, a negative electrode plate and a diaphragm in a layered manner, and the electric connection mode between one of the positive electrode plate lug and the negative electrode plate lug and the corresponding pole shell comprises the following steps: firstly, preparing a metal sheet, and welding one end of the electrode lug, which extends out of the battery cell, on the metal sheet; coating a layer of conductive adhesive on the non-welding surface of the metal sheet, and bonding and fixing the surface of the metal sheet coated with the conductive adhesive and the inner surface of the corresponding pole shell together; the other electrode tab is electrically connected with the corresponding electrode shell in the following way: preparing another metal sheet, welding one end of the electrode lug extending out of the battery core on the metal sheet, and enabling the non-welding surface of the metal sheet to be in direct physical contact with the inner surface of the corresponding pole shell to realize electric connection. The production method of the anti-seepage button cell is simple and easy to operate.
Description
Technical Field
The invention relates to a method for producing a button battery with liquid seepage prevention and the button battery prepared by the method.
Background
Button cells (button cells) are also called button cells, and refer to cells with the overall dimensions like a small button, generally speaking, the button cells have a larger diameter and a thinner thickness (compared with cylindrical cells such as a cell with a size of 5 AA on the market), the button cells are classified from the aspect of the appearance, and the equivalent corresponding cells are classified into cylindrical cells, square cells, special-shaped cells and the like.
Button cells include both laminate and wound. The basic structure of the winding type button cell is as follows: the button battery comprises a first pole shell, a second pole shell, an insulating seal ring and a battery cell, wherein the upper openings and the lower openings of the first pole shell and the second pole shell are oppositely buckled to form a cylindrical button battery shell; a gap is reserved between the first pole shell and the second pole shell, the gap is filled with an insulating sealing ring to electrically isolate the first pole shell from the second pole shell, and an accommodating cavity is formed among the first pole shell, the second pole shell and the insulating sealing ring; the electric core is located the holding intracavity, electric core include first pole piece, second pole piece and diaphragm, through the diaphragm interval between first pole piece and the second pole piece, first pole piece, second pole piece and diaphragm are convoluteed and are made electric core, and the center of electric core is formed with the axial cavity, is equipped with first output conductor on the first pole piece, and first output conductor stretches out and welds with first polar shell from electric core, is equipped with second output conductor on the second pole piece, and second output conductor stretches out and welds with second polar shell from electric core. When the conventional coiled button battery is manufactured, a first output conductor of a battery core is bent to enable the first output conductor to be tightly attached to the lower surface of the battery core, and the first output conductor extends to the position right below an axial cavity; then vertically arranging the battery cell into the first pole shell; then, the welding needle is vertically inserted downwards into the axial cavity, the first output conductor is tightly pressed on the first shell, and the first output conductor and the first polar shell are welded together in an electric resistance welding mode, or the first polar shell and the first output conductor are welded together in a laser welding mode by emitting laser from the lower part of the first polar shell opposite to the area of the first polar shell, which is vertically overlapped with the first output conductor; welding a second output conductor of the battery cell on a second pole shell, wherein an insulating sealing ring is sleeved outside the second pole shell; and finally, covering the opening at the upper end of the first polar shell together with the second polar shell and the insulating sealing ring, and sealing. One of the first pole shell and the second pole shell, the corresponding output conductor and the corresponding battery cell pole piece form a positive pole loop of the battery, and the other pole shell, the corresponding output conductor and the corresponding battery cell pole piece form a negative pole loop of the battery. Because first output conductor and first polar shell welding (second output conductor and second polar shell welding) time, the electric current that resistance welded and the laser beam of laser welding all can the straight line pierce through first polar shell (second polar shell) for the solder joint can run through first polar shell (second polar shell) setting, destroys roughness and the stability on polar shell surface, when interior pressure is too big, the solder joint breaks easily, thereby the phenomenon such as weeping and the surperficial swell that lead to the solder joint position electrolyte to appear easily.
Disclosure of Invention
One of the purposes of the invention is to provide a production method of a liquid-seepage-proof button cell, which is simple and easy to operate, can avoid damaging the flatness and stability of the surfaces of a positive electrode shell and a negative electrode shell, and is not easy to cause electrolyte leakage, surface bulge and the like.
The production method of the anti-seepage button battery comprises an anode shell, a cathode shell and an electric core, wherein the anode shell and the cathode shell are both in a cup shape, the electric core is mainly formed by laminating or winding an anode piece, a cathode piece and a diaphragm, the anode piece is electrically connected with an anode tab, the anode tab is electrically connected with the anode shell, the cathode piece is electrically connected with a cathode tab, the cathode tab is electrically connected with a cathode shell, the cathode tab is electrically connected with the cathode shell, and the electrical connection mode between one of the anode tab and the cathode tab and the corresponding electrode shell comprises the following steps:
s1: preparing a metal sheet, welding one end of the electrode lug, which extends out of the battery core, on the metal sheet, and forming a welding spot between the electrode lug and the metal sheet;
s2: coating conductive adhesive on the non-welding surface of the metal sheet, and bonding and fixing the surface of the metal sheet coated with the conductive adhesive and the inner surface of the corresponding pole shell together;
s3: and electrically connecting the other electrode tab of the positive and negative electrode tabs with the corresponding electrode shell in the following manner: preparing another metal sheet, welding one end of the electrode lug extending out of the battery core on the metal sheet, forming a welding spot between the metal sheet and the electrode lug, and enabling the non-welding surface of the metal sheet to be in direct physical contact with the inner surface of the corresponding electrode shell to realize electric connection.
Because the welded connection strength is high and is not influenced by external factors (such as temperature, humidity, corrosivity and other climatic environments), the outer end of the electrode lug is welded on the metal sheet before the metal sheet is arranged in the electrode shell in the electric connection mode between one of the anode lug and the cathode lug and the corresponding electrode shell, so that the stable connection between the electrode lug and the metal sheet is realized, and meanwhile, the conductive adhesive connection has the advantages of simple operation, no damage to a base material, high fatigue resistance of a joint and the like; according to the invention, the non-welding surface of the metal sheet is coated with the conductive adhesive, so that not only can the stable connection between the metal sheet and the polar shell be realized, but also the structure of the polar shell is kept complete, and the phenomena of electrolyte leakage, surface bulge and the like are not easy to occur; meanwhile, in the electric connection mode between the other electrode tab of the positive electrode tab and the negative electrode tab and the corresponding electrode shell, the electrode tab is welded and fixed with a metal sheet, and the non-welding surface of the metal sheet is in physical contact connection with the inner surface of the corresponding electrode shell, so that the operation is simple, and the electrode shell is not damaged.
In another specific implementation, step S3 may be performed first, and then steps S1 and S2 may be performed in sequence.
No matter the step S3 is performed first and then the steps S1 and S2 are performed, or the steps S1 and S2 are performed first and then the step S3 is performed, the sequence of the steps S1 and the step S2 can be changed, and at least 1 pair of welding points are formed between the electrode tab and the metal sheet in the step S1 by resistance welding of parallel welding.
Preferably, in step S2, the non-soldering surface of the metal sheet is coated with the conductive adhesive uniformly and in all directions, so as to ensure that the metal sheet and the electrode shell have the largest contact area and improve the good electrical contact therebetween.
In the specific implementation process, the electrode tabs and the corresponding metal sheets are welded in any one of laser welding and resistance welding.
Preferably, after the upper openings and the lower openings of the positive electrode shell and the negative electrode shell are oppositely buckled to form the cylindrical button battery shell, the positive electrode shell and the negative electrode shell are partially overlapped in the vertical direction, and the cylindrical button battery shell is sealed by inwardly extruding the end wall of the opening of the positive electrode shell exposed outside. The extrusion sealing step makes the physical contact connection between the metal sheet and the corresponding pole shell more reliable.
The invention also aims to provide a liquid seepage prevention button battery which comprises a positive electrode shell, a negative electrode shell, an insulating sealing ring and a battery cell, wherein the positive electrode shell and the negative electrode shell are both cup-shaped, and the upper openings and the lower openings of the positive electrode shell and the negative electrode shell are oppositely buckled to form a cylindrical button battery shell; a gap is reserved between the positive electrode shell and the negative electrode shell, the gap is filled with an insulating sealing ring to electrically isolate the positive electrode shell from the negative electrode shell, and an accommodating cavity is formed among the positive electrode shell, the negative electrode shell and the insulating sealing ring; the battery cell is arranged in the accommodating cavity and mainly formed by laminating or winding a positive plate, a negative plate and a diaphragm, wherein the positive plate is electrically connected with a positive pole lug, the positive pole lug is further electrically connected with the positive shell, the negative plate is electrically connected with a negative pole lug, and the negative pole lug is further electrically connected with the negative shell; one of the positive and negative electrode tabs and the corresponding electrode shell are electrically connected by the following structure: one end of the electrode lug extending out of the battery core is fixedly connected with the outer surface of a metal sheet through a welding point, and the metal sheet is fixedly arranged on the inner surface of the corresponding electrode shell through a conductive adhesive layer; the electric connection structure between the other electrode tab and the corresponding electrode shell in the anode tab and the cathode tab is as follows: one end of the other electrode tab extending out of the battery core is fixedly connected with the outer surface of the other metal sheet through the other welding point, and the other metal sheet is in physical contact connection with the inner surface of the corresponding electrode shell.
The positive and negative electrode shell structures of the button cell are kept complete, electrolyte leakage and surface bulge are not easy to occur, and the button cell is simple to operate.
Preferably, the electrical connection structure between the positive electrode tab and the positive electrode casing is characterized in that one end of the positive electrode tab extending out of the battery cell is fixedly connected with the outer surface of the positive electrode metal sheet through a positive electrode welding point, and the positive electrode metal sheet is in physical contact connection with the inner surface of the positive electrode casing, further preferably, the positive electrode metal sheet covers the battery cell, the outer edge of the positive electrode metal sheet vertically extends towards the outer side of the battery cell to form an annular flange which can play a role in fixing the battery cell, furthermore, the positive electrode casing and the negative electrode casing are partially overlapped in the vertical direction, the opening end wall of the negative electrode casing is positioned at the inner side of the opening end wall of the positive electrode casing, a gap is reserved between the opening end wall of the negative electrode casing and the opening end wall of the positive electrode casing, the insulating sealing ring is clamped in the gap, the lower end of the insulating sealing ring extends inwards to form a bent part, the bent part wraps the opening end wall of the negative electrode casing, the positive electrode casing, the electric core and the insulating sealing ring are in an annular cavity, the annular flange of the positive electrode casing is embedded in the annular flange and is in a pressing force which is transmitted towards the inner end wall of the positive electrode casing, and the annular flange is transmitted towards the annular flange, and the annular flange is in a pressing force transmitted towards the annular flange, and the annular flange is transmitted towards the annular flange, and the annular flange "
And (4) shape.
Preferably, an anode insulating sheet is arranged between the anode shell and the battery core, and an anode tab penetrates or bypasses the anode insulating sheet and is electrically connected with the inner surface of the anode shell. The arrangement of the anode insulation sheet can avoid the contact of the anode tab and the cathode sheet of the battery cell to form a short circuit.
Preferably, a negative electrode insulation sheet is arranged between the negative electrode shell and the battery core, and a negative electrode tab penetrates or bypasses the negative electrode insulation sheet and is electrically connected with the inner surface of the negative electrode shell. The arrangement of the negative electrode insulation sheet can avoid the contact of a negative electrode tab and a positive electrode sheet of the battery cell to form a short circuit.
Drawings
Fig. 1 is a structural view of a welding of a negative electrode tab and a negative electrode metal piece of example 1, wherein the negative electrode metal piece is a cross-sectional view;
fig. 2 is a schematic view of a connection structure between a negative electrode metal sheet and a negative electrode can in example 1, wherein the negative electrode metal sheet and the negative electrode can are cross-sectional views;
FIG. 3 is a schematic sectional view of a button cell in accordance with example 1;
FIG. 4 is a schematic sectional view of a button cell in accordance with example 2;
fig. 5 is a schematic sectional structure view of a button cell of embodiment 3.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings:
example 1
With reference to fig. 1 to 3, a method for producing a liquid-impermeable button cell includes a positive electrode shell 11, a negative electrode shell 12 and a cell 30, wherein the positive electrode shell 11 and the negative electrode shell 12 are both cup-shaped, the cell 30 is mainly formed by laminating or winding a positive electrode sheet 31, a negative electrode sheet 32 and a diaphragm 33, the positive electrode sheet 31 is electrically connected with a positive electrode tab 21, the positive electrode tab 21 is electrically connected with the positive electrode shell 11, the negative electrode sheet 32 is electrically connected with a negative electrode tab 22, and the negative electrode tab 22 is electrically connected with the negative electrode shell 12, wherein the electrical connection mode between the negative electrode tab 22 and the negative electrode shell 12 includes the following steps:
s1: preparing a negative electrode metal sheet 42, welding one end of a negative electrode tab 22 extending out of the battery core 30 on the negative electrode metal sheet 42, and forming a negative electrode welding point 52 between the negative electrode tab 22 and the negative electrode metal sheet 42;
s2: coating conductive adhesive 80 on the non-welding surface of the negative metal sheet 42, and adhering and fixing the surface of the negative metal sheet 42 coated with the conductive adhesive 80 and the inner surface of the negative shell 12 together;
s3: the electrical connection between the positive electrode tab 21 and the positive electrode can 11 is achieved in the following manner: preparing a positive electrode metal sheet 41, welding one end of the positive electrode tab 21 extending out of the battery core 30 on the positive electrode metal sheet 41, forming a positive electrode welding spot 51 between the positive electrode metal sheet 41 and the positive electrode tab 21, and electrically connecting the non-welding surface of the positive electrode metal sheet 41 and the inner surface of the positive electrode shell 11 in direct physical contact.
The button battery with the liquid seepage prevention function is manufactured according to the production method of the button battery with the liquid seepage prevention function in embodiment 1, and comprises a positive electrode shell 11, a negative electrode shell 12, an insulating sealing ring 70 and a battery cell 30, wherein the positive electrode shell 11 and the negative electrode shell 12 are both cup-shaped, and the upper openings and the lower openings of the positive electrode shell 11 and the negative electrode shell 12 are oppositely buckled to form a cylindrical button battery shell; a gap is reserved between the positive electrode shell 11 and the negative electrode shell 12, the insulating sealing ring 70 is filled in the gap to electrically isolate the positive electrode shell 11 from the negative electrode shell 12, and an accommodating cavity is formed among the positive electrode shell 11, the negative electrode shell 12 and the insulating sealing ring 70; the battery cell 30 is arranged in the accommodating cavity, the battery cell 30 is mainly formed by laminating or winding a positive plate 31, a negative plate 32 and a diaphragm 33, the positive plate 31 is electrically connected with a positive pole tab 21, the positive pole tab 21 is electrically connected with the positive shell 11, the negative plate 32 is electrically connected with a negative pole tab 22, and the negative pole tab 22 is electrically connected with the negative shell 12;
the electrical connection structure between the negative electrode tab 22 and the negative electrode can 12 is: one end of the negative electrode tab 22 extending out of the battery cell 30 is fixedly connected with the outer surface of a negative electrode metal sheet 42 through a negative electrode welding point 52, and the negative electrode metal sheet 42 is fixedly arranged on the inner surface of the negative electrode shell 12 through a conductive adhesive layer 80;
the electric connection structure between the positive electrode tab 21 and the positive electrode shell 11 is as follows: one end of the positive electrode tab 21 extending out of the battery cell 30 is fixedly connected with the outer surface of the positive electrode metal sheet 41 through a positive electrode welding spot 51, and the positive electrode metal sheet 41 is in physical contact connection with the inner surface of the positive electrode shell 11;
the negative electrode metal sheet 42 is a planar metal plate structure, the positive electrode metal sheet 41 covers the battery cell 30, an outer edge of the positive electrode metal sheet 41 vertically extends towards the outer side of the battery cell 30 to form an annular rib 410, and the section of the annular rib 410 is "┐".
In the electric connection mode between the positive electrode tab 21 and the positive electrode shell 11, the conductive adhesive 80 is coated on the non-welding surface of the positive electrode metal sheet 41, the conductive adhesive 80 is tightly attached to the positive electrode shell 11, so that good electric contact between the positive electrode metal sheet 41 and the positive electrode shell 11 is ensured, and meanwhile, the structure of the positive electrode shell 11 is kept complete, and the phenomena of electrolyte leakage, surface bulging and the like are not easy to occur; meanwhile, in the electrical connection mode between the negative electrode tab 22 and the negative electrode shell 12, the negative electrode tab 22 and the negative electrode metal sheet 42 are welded and fixed, and the non-welding surface of the negative electrode metal sheet 42 is in physical contact connection with the inner surface of the negative electrode shell 12, so that the operation is simple, the negative electrode shell 12 is not damaged, and the structure is simple and easy to manufacture.
Example 2
A method for manufacturing a liquid-impermeable button cell, which is different from the method for manufacturing the liquid-impermeable button cell of embodiment 1, is as follows: the electrical connection between the positive electrode tab 21 and the positive electrode can 11 includes the following steps:
s1: preparing a positive electrode metal sheet 41, welding one end of the positive electrode tab 21 extending out of the battery core 30 on the positive electrode metal sheet 41, and forming a positive electrode welding spot 51 between the positive electrode tab 21 and the positive electrode metal sheet 41;
s2: coating a layer of conductive adhesive 80 on the non-welding surface of the positive metal sheet 41, and bonding and fixing the surface of the positive metal sheet 41 coated with the conductive adhesive 80 and the inner surface of the positive shell 11 together;
s3: the electrical connection between the negative electrode tab 22 and the negative electrode can 12 is achieved in the following manner: preparing a negative electrode metal sheet 42, welding one end of the negative electrode tab 22 extending out of the battery core 30 on the negative electrode metal sheet 42, forming a negative electrode welding point 52 between the negative electrode metal sheet 42 and the negative electrode tab 22, and enabling a non-welding surface of the negative electrode metal sheet 42 to be in direct physical contact with the inner surface of the negative electrode shell 12 to realize electrical connection.
A liquid-impermeable button cell that differs from the liquid-impermeable button cell of example 1:
the electric connection structure between the positive electrode tab 21 and the positive electrode shell 11 is as follows: one end of the positive electrode tab 21 extending out of the battery cell 30 is fixedly connected with the outer surface of the positive electrode metal sheet 41 through a positive electrode welding spot 51, and the positive electrode metal sheet 41 is fixedly arranged on the inner surface of the positive electrode shell 11 through a conductive adhesive layer 80;
the electrical connection structure between the negative electrode tab 22 and the negative electrode can 12 is: one end of the negative electrode tab 22 extending out of the battery cell 30 is fixedly connected with the outer surface of the negative electrode metal sheet 42 through a negative electrode welding point 52, and the negative electrode metal sheet 42 is in physical contact connection with the inner surface of the negative electrode shell 12;
the positive electrode metal piece 41 is also a planar metal plate structure.
Example 3
As shown in fig. 5, a liquid-impermeable button cell differs from the liquid-impermeable button cell of example 1 in that: the annular rib 410 has a cross-section of "
And (4) shape.
The production method of the impermeable button cell of the embodiment 1-3 can be improved as follows:
(1) in the step S2, conductive adhesive is uniformly coated on the non-welding surface of the metal sheet in an all-around manner, so that the contact area between the metal sheet and the pole shell is ensured to be as large as possible, and the electric contact effect is improved;
(2) in the specific implementation process, the electrode tabs (21; 22) and the corresponding metal sheets (41; 42) are welded in any one of laser welding and resistance welding;
(3) after the positive electrode shell 11 and the negative electrode shell 12 are oppositely buckled with each other at the upper and lower openings to form the cylindrical button cell shell, the positive electrode shell and the negative electrode shell (11, 12) are partially overlapped in the vertical direction, and the cylindrical button cell shell is sealed by inwardly pressing the exposed end wall of the opening of the electrode shell. The extrusion sealing step has the technical effect that the metal sheet and the corresponding pole shell are attached more tightly to a certain extent.
The button cells of examples 1-3 can be modified as follows:
(1) as shown in fig. 3 to 5, a positive electrode insulation sheet 91 is disposed between the positive electrode casing 11 and the battery cell 30, and the positive electrode tab 21 passes through or bypasses the positive electrode insulation sheet 91 and is electrically connected to the inner surface of the positive electrode casing 11. The arrangement of the positive insulation sheet 91 can avoid the short circuit formed by the contact between the positive tab 21 and the negative tab 32 of the battery cell 30;
(2) as shown in fig. 3 to 5, a negative electrode insulation sheet 92 is respectively disposed between the negative electrode casing 12 and the battery cell 30, and the negative electrode tab 22 passes through or bypasses the negative electrode insulation sheet 92 and is electrically connected to the inner surface of the negative electrode casing 12. The negative insulation sheet 92 is provided to prevent the negative tab 22 from contacting the positive sheet 31 of the battery cell 30 to form a short circuit.
Certainly, no insulating sheet may be arranged between the metal sheet and the battery cell 30, and at this time, a short circuit may be avoided by wrapping a layer of insulating sleeve outside the electrode tab, or by arranging the positive electrode sheet 31 and the negative electrode sheet 32 in the battery cell 30 in a vertically staggered manner, a certain height distance is maintained between one electrode sheet that is not electrically connected with the electrode tab and the electrode tab extending out of the battery cell, so as to avoid a short circuit.
In addition, the button cell of the embodiment 2 and the embodiment 3 can be further modified as follows: as shown in fig. 4 and 5, the positive and negative electrode cases (11, 12) are partially overlapped in the vertical direction, the opening end wall of the negative electrode case 12 is located inside the opening end wall of the positive electrode case 11, a gap is left between the opening end wall of the negative electrode case 12 and the opening end wall of the positive electrode case 11, the insulating sealing ring 70 is clamped in the gap, the lower end of the insulating sealing ring 70 extends inwards to form a bent portion 71, the bent portion 71 wraps the opening end wall of the negative electrode case 12, and an annular cavity is formed among the positive electrode case 11, the battery cell 30 and the bent portion 71 of the insulating sealing ring; the annular rib 410 of the positive electrode metal sheet 41 is embedded in the annular cavity, and the upper end of the annular rib 410 is abutted to the bottom of the bending part 71 of the insulating sealing ring. The contact area between the positive electrode metal sheet 41 and the positive electrode can 11 is large, which can achieve the function of collecting current, and meanwhile, when the conventional battery sealing operation is performed by pressing the opening end wall of the positive electrode can 11 inwards, the opening end wall of the positive electrode can 11 transmits downward pressing force to the annular rib 410 in the inward bending process, so that the physical contact between the positive electrode metal sheet 41 and the positive electrode can 11 is tighter.
The method for manufacturing the liquid-impermeable button cell in example 1 is a preferred embodiment of the present invention, however, the method for manufacturing the liquid-impermeable button cell of the present invention can be performed in the sequence of "step S2-step S1-step S3" or "step S3-step S1-step S2" or "step S3-step S2-step S1" or other ways, wherein when the sequence of "step S2-step S1-step S3" or step S3-step S2-step S1 "is performed, at least 1 pair of welding points 52 (as shown in fig. 3) are formed between the electrode tab 22 and the metal sheet 42 by resistance welding of parallel welding in step S1.
It should be noted that the negative electrode metal sheet 42 of the present invention is disposed to cover the battery cell 30, and the outer edge of the negative electrode metal sheet 42 may also extend perpendicularly to the outer side of the battery cell 30 to form an annular rib, and the cross-sectional shape of the annular rib 410 of the present invention is not limited to the "┐" shape or the "┐" shape "
The shape of the Chinese character 'ji' can also be other common shapes such as T-shaped or special-shaped shapes. The sealing step of the invention is not limited to sealing the cylindrical button cell shell by pressing the exposed end wall of the polar shell opening inwards, and can be any sealing method in the prior art. The structure of the battery cell 30 of the present invention is not limited to the specific structure shown in the drawings, and may be any battery cell structure.
Claims (13)
1. The utility model provides a production method of prevention of seepage liquid button cell, button cell includes anodal shell, negative pole shell and electric core, and anodal shell and negative pole shell all are the cup, electric core mainly by positive plate, negative pole piece, diaphragm laminarization stack or convolute and form, positive plate and an anodal utmost point ear electricity are connected, and anodal utmost point ear is connected with anodal shell electricity again, and negative pole piece and a negative pole utmost point ear electricity are connected, and negative pole utmost point ear is connected with negative pole shell electricity again, and its characterized in that, the electric connection mode between one of them electrode tab in positive, the negative pole utmost point ear and the corresponding utmost point shell includes the following step:
s1: preparing a metal sheet, welding one end of the electrode lug, which extends out of the battery core, on the metal sheet, and forming a welding spot between the electrode lug and the metal sheet;
s2: coating conductive adhesive on the non-welding surface of the metal sheet, and bonding and fixing the surface of the metal sheet coated with the conductive adhesive and the inner surface of the corresponding pole shell together;
s3: and electrically connecting the other electrode tab of the positive and negative electrode tabs with the corresponding electrode shell in the following manner: preparing another metal sheet, welding one end of the electrode lug extending out of the battery core on the metal sheet, forming a welding spot between the metal sheet and the electrode lug, and enabling the non-welding surface of the metal sheet to be in direct physical contact with the inner surface of the corresponding electrode shell to realize electric connection.
2. The button cell pole shell and electrode tab electrical connection method of claim 1, wherein: step S3 is performed first, and then steps S1 and S2 are performed in this order.
3. The button cell pole shell and electrode tab electrical connection method according to any one of claims 1 or 2, characterized in that: the sequence of the step S1 and the step S2 is changed, and at least 1 pair of welding points are formed between the electrode tab and the metal sheet through resistance welding of parallel welding in the step S1.
4. The method for producing a liquid-impermeable button cell as claimed in claim 1, characterized in that: in step S2, a conductive adhesive is uniformly applied to the non-soldering surface of the metal sheet in all directions.
5. The method for producing a liquid-impermeable button cell as claimed in claim 1, characterized in that: the electrode tabs and the corresponding metal sheets are welded in any one of laser welding and resistance welding.
6. The method for producing a liquid-impermeable button cell as claimed in claim 1, characterized in that: after the openings of the positive electrode shell and the negative electrode shell are oppositely buckled to form the cylindrical button battery shell, the positive electrode shell and the negative electrode shell are partially overlapped in the vertical direction, and the cylindrical button battery shell is sealed by the end wall of the opening of the pole shell exposed outside through inward extrusion.
7. A liquid seepage prevention button battery comprises a positive electrode shell, a negative electrode shell, an insulating sealing ring and a battery cell, wherein the positive electrode shell and the negative electrode shell are both cup-shaped, and the upper openings and the lower openings of the positive electrode shell and the negative electrode shell are oppositely buckled to form a cylindrical button battery shell; a gap is reserved between the positive electrode shell and the negative electrode shell, the gap is filled with an insulating sealing ring to electrically isolate the positive electrode shell from the negative electrode shell, and an accommodating cavity is formed among the positive electrode shell, the negative electrode shell and the insulating sealing ring; the battery cell is arranged in the accommodating cavity and mainly formed by laminating or winding a positive plate, a negative plate and a diaphragm, wherein the positive plate is electrically connected with a positive pole lug, the positive pole lug is further electrically connected with the positive shell, the negative plate is electrically connected with a negative pole lug, and the negative pole lug is further electrically connected with the negative shell; the lithium ion battery is characterized in that the electric connection structure between one of the positive electrode lug and the negative electrode lug and the corresponding electrode shell is as follows: one end of the electrode lug extending out of the battery core is fixedly connected with the outer surface of a metal sheet through a welding point, and the metal sheet is fixedly arranged on the inner surface of the corresponding electrode shell through a conductive adhesive layer; the electric connection structure between the other electrode tab and the corresponding electrode shell in the anode tab and the cathode tab is as follows: one end of the other electrode tab extending out of the battery core is fixedly connected with the outer surface of the other metal sheet through the other welding point, and the other metal sheet is in physical contact connection with the inner surface of the corresponding electrode shell.
8. The button cell with liquid seepage prevention according to claim 6, wherein the electrical connection structure between the positive electrode tab and the positive electrode shell is as follows: one end of the positive pole lug extending out of the battery core is fixedly connected with the outer surface of the positive pole metal sheet through a positive pole welding spot, and the positive pole metal sheet is in physical contact connection with the inner surface of the positive pole shell.
9. The liquid-impermeable button cell of claim 7, wherein: the positive pole sheetmetal covers the electric core and is arranged, and the outer edge of the positive pole sheetmetal extends perpendicularly towards the outer side of the electric core to form an annular flange.
10. The liquid-impermeable button cell of claim 8, wherein: the positive and negative electrode shells are partially overlapped in the vertical direction, the opening end wall of the negative electrode shell is positioned on the inner side of the opening end wall of the positive electrode shell, a gap is reserved between the opening end wall of the negative electrode shell and the opening end wall of the positive electrode shell, the insulating sealing ring is clamped in the gap, the lower end of the insulating sealing ring extends inwards to form a bent part, the opening end wall of the negative electrode shell is wrapped in the bent part, and an annular cavity is formed among the positive electrode shell, the battery cell and the bent part of the insulating sealing ring; the annular flange of the metal sheet of the anode is embedded in the annular cavity, and the upper end of the annular flange is abutted against the bottom of the bending part of the insulating sealing ring.
11. The button cell with liquid leakage prevention function according to claim 8, wherein the cross section of the annular rib is ┐ -shaped or "
And (4) shape.
12. The liquid-impermeable button cell of claim 6, wherein: and an anode insulating sheet is arranged between the anode shell and the battery core, and an anode tab penetrates or bypasses the anode insulating sheet and is electrically connected with the inner surface of the anode shell.
13. The liquid-impermeable button cell of claim 6, wherein: and a negative electrode insulation sheet is arranged between the negative electrode shell and the battery core, and a negative electrode tab penetrates or bypasses the negative electrode insulation sheet and is electrically connected with the inner surface of the negative electrode shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010335485.5A CN111341967A (en) | 2020-04-24 | 2020-04-24 | Production method of anti-seepage button battery and button battery manufactured by same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010335485.5A CN111341967A (en) | 2020-04-24 | 2020-04-24 | Production method of anti-seepage button battery and button battery manufactured by same |
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| CN111341967A true CN111341967A (en) | 2020-06-26 |
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| CN202010335485.5A Pending CN111341967A (en) | 2020-04-24 | 2020-04-24 | Production method of anti-seepage button battery and button battery manufactured by same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871803A (en) * | 2021-09-01 | 2021-12-31 | 多氟多新能源科技有限公司 | Cylindrical battery cell adopting non-welding conductive connection and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001319501A (en) * | 2000-05-12 | 2001-11-16 | Asahi Denki Kasei Kk | Portable illumination apparatus |
| JP2004327047A (en) * | 1998-10-19 | 2004-11-18 | Dainippon Printing Co Ltd | Polymer battery and polymer battery pack |
| CN209947932U (en) * | 2019-07-05 | 2020-01-14 | 重庆市维都利新能源有限公司 | Button cell without negative pole lug lamination |
| CN110854338A (en) * | 2019-11-21 | 2020-02-28 | 漳州万宝能源科技有限公司 | Explosion-proof structure of button cell and working method thereof |
| CN210379130U (en) * | 2020-02-27 | 2020-04-21 | 比亚迪股份有限公司 | Button cell |
-
2020
- 2020-04-24 CN CN202010335485.5A patent/CN111341967A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004327047A (en) * | 1998-10-19 | 2004-11-18 | Dainippon Printing Co Ltd | Polymer battery and polymer battery pack |
| JP2001319501A (en) * | 2000-05-12 | 2001-11-16 | Asahi Denki Kasei Kk | Portable illumination apparatus |
| CN209947932U (en) * | 2019-07-05 | 2020-01-14 | 重庆市维都利新能源有限公司 | Button cell without negative pole lug lamination |
| CN110854338A (en) * | 2019-11-21 | 2020-02-28 | 漳州万宝能源科技有限公司 | Explosion-proof structure of button cell and working method thereof |
| CN210379130U (en) * | 2020-02-27 | 2020-04-21 | 比亚迪股份有限公司 | Button cell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871803A (en) * | 2021-09-01 | 2021-12-31 | 多氟多新能源科技有限公司 | Cylindrical battery cell adopting non-welding conductive connection and preparation method thereof |
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