CN111922497A - External butt-welding method and button battery - Google Patents
External butt-welding method and button battery Download PDFInfo
- Publication number
- CN111922497A CN111922497A CN202010796642.2A CN202010796642A CN111922497A CN 111922497 A CN111922497 A CN 111922497A CN 202010796642 A CN202010796642 A CN 202010796642A CN 111922497 A CN111922497 A CN 111922497A
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- China
- Prior art keywords
- conductor
- welding
- metal shell
- welding method
- welding pin
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
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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
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
Abstract
The invention provides an external butt-welding method, which comprises the following steps: s1, closely attaching the areas of the first conductor and the second conductor which need to be welded to each other in a plane or curved surface mode; s2, respectively contacting the first welding pin and the second welding pin with the end face of the first conductor welding area; s3, starting a power supply by taking the first welding pin as a positive pole or a negative pole and the second welding pin as a corresponding negative pole or a positive pole, wherein current flows back and forth between the first conductor and the second conductor; s4, separating the first welding pin and the second welding pin from the first conductor respectively, wherein a part between the first conductor and the second conductor and in a molten state forms a welding core due to spontaneous heat dissipation; the invention also provides a button battery; by adopting the butt-welding method, the production process of the button cell is simplified, the production cost of the button cell is greatly reduced, the production efficiency of the cell is improved, the occupied space of the internal structure of the cell can be reduced, and the energy density of the button cell is improved.
Description
Technical Field
The invention relates to the field of welding, in particular to an external butt-welding method and a button battery.
Background
The internal electric core of the domestic steel shell polymer lithium ion button battery is of a laminated type or a winding type, and in any form, the internal electric core has a process that positive and negative pole pieces are welded to a shell, the positive and negative pole pieces need to be welded to the shell by means of a larger conductor, the traditional welding method is complex in operation, longitudinal thickness space is occupied, mass energy density is reduced, capacity limitation on battery design can be large, space structure is limited to a certain extent, and the internal electric core is very unfavorable for enterprises to compete for high-capacity high-density energy.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an external butt-welding method which is convenient to weld, reliable and stable in welding, high in stability, capable of reducing the occupied volume of the internal space structure of the button cell and beneficial to improving the energy density of the button cell, and also provides the button cell adopting the external butt-welding method, and the external butt-welding method has the advantage of high energy density.
In order to achieve the purpose, the invention provides an external butt-welding method, which comprises the following steps:
s1, closely attaching the areas of the first conductor and the second conductor which need to be welded to each other in a plane or curved surface mode;
s2, respectively contacting the end faces of the first conductor welding areas with a first welding pin and a second welding pin which are both conductive;
s3, starting a power supply by taking the first welding pin as a positive pole or a negative pole and the second welding pin as a corresponding negative pole or a positive pole, wherein current flows back and forth between the first conductor and the second conductor, and the part of the second conductor in close contact with the first conductor and the part of the first conductor in close contact with the second conductor are heated to form a molten state;
and S4, separating the first welding pin and the second welding pin from the first conductor respectively, wherein a part between the first conductor and the second conductor and in a molten state forms a welding core due to spontaneous heat dissipation.
Preferably, the power supply is an alternating current type, an alternating current inverter type or a transistor type.
Preferably, the material of the first conductor is steel, copper, aluminum or nickel.
Preferably, the second conductor is made of steel, copper, aluminum or nickel.
Compared with the prior art, the external butt-welding method provided by the invention has the beneficial effects that:
by adopting the method, the areas to be welded of the first conductor and the second conductor are tightly attached to each other in a plane or curved surface mode, so that the welding can be successful, the limitation of the button cell on the internal structure is released, the production process of the button cell is simplified, the production cost of the button cell is greatly reduced, the production efficiency of the cell is improved, the occupied space of the internal structure of the cell can be reduced, and the energy density of the button cell is improved.
The invention also provides a button battery, which comprises a metal shell and an electric core arranged in the metal shell, wherein the electric core is provided with a conductor electrically connected with the metal shell.
Preferably, the metal shell is cylindrical, and the side surface, the upper bottom surface or the lower bottom surface of the metal shell is electrically connected with the conductor.
Preferably, the metal shell is made of steel, copper, aluminum or nickel.
Preferably, the material of the conductor is steel, copper, aluminum or nickel.
Compared with the prior art, the button cell provided by the invention has the beneficial effects that:
due to the adoption of the external butt-welding method in the technical scheme, the electric core in the button battery can be welded with the metal shell from the outside only through the thin electric conductor, so that the occupied space of the internal structure of the button battery is greatly reduced, the button battery has the advantage of high energy density, the production process of the battery is simplified, and the production cost of the battery is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic illustration of an external butt-welding method provided by the present invention;
FIG. 2 is a schematic view of a first internal structure of a button cell according to the present invention;
fig. 3 is a schematic view of a second internal structure of a button cell provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present invention provides an external butt-welding method, comprising the following steps:
s1, closely attaching the areas of the first conductor 3 and the second conductor 4 needing to be welded to each other in a plane or curved surface mode;
s2, respectively contacting the end faces of the welding areas of the first conductor 3 by using a first welding pin 5 and a second welding pin 6 which are both conductive;
s3, starting a power supply by using the first welding pin 5 as a positive pole or a negative pole and the second welding pin 6 as a corresponding negative pole or a positive pole, wherein current flows back and forth between the first conductor 3 and the second conductor 4, and the part of the second conductor 4 in close contact with the first conductor 3 and the part of the first conductor 3 in close contact with the second conductor 4 are heated to form a molten state;
s4, the first and second welding pins are separated from the first conductor, respectively, and the part between the first and second conductors 3 and 4 and in the molten state forms a nugget 7 due to spontaneous heat dissipation.
In particular, the principle of resistive thermal effects:
the generation of welding heat effect and the amount of heat generated during spot welding, which is a factor affecting heat generation, are determined by the following formula: q ═ I2Rt
Q in the formula-Heat generated (J)
I-welding current (A)
R-resistance (omega)
t-welding time(s)
The resistance R in the above formula includes the resistance of the first conductor 3 and the second conductor 4, the contact resistance between the first conductor 3 and the second conductor 4, and the contact resistance between the bonding pin and the first conductor 3.
Specifically, the power supply in steps S5 and S6 is an alternating current type, an alternating current inverter type, or a transistor type, the first conductor is made of a metal such as steel, copper, aluminum, or nickel, the first conductor 3 is preferably made of steel, the second conductor 4 is made of a metal such as steel, copper, aluminum, or nickel, and the second conductor is preferably made of copper or aluminum.
By adopting the butt-welding method, the areas to be welded of the first conductor 3 and the second conductor 4 are mutually and tightly attached in a plane or curved surface form, so that the welding can be successful, the limitation of the button cell on the internal structure is relieved, the production process of the button cell is simplified, the production cost of the button cell is greatly reduced, the production efficiency of the cell is improved, the occupied space of the internal structure of the cell can be reduced, and the energy density of the button cell is improved.
Example two
The invention also provides a button battery, which comprises a metal shell 1 and an electric core 2 arranged in the metal shell 1, wherein the electric core 2 is provided with an electric conductor 21 electrically connected with the metal shell 1, the external butt-welding method in the first embodiment is adopted, the metal shell 1 is a first conductor 3, and the electric conductor 21 is a thin second conductor 4.
In this embodiment, the metal shell 1 is cylindrical, and the side surface, the upper bottom surface, or the lower bottom surface of the metal shell 1 is electrically connected to the conductor 21, that is: as shown in fig. 2, the nugget 7 formed by the metal shell 1 and the conductor 21 may be inside the cylindrical surface of the metal shell 1, as shown in fig. 3, the nugget 7 may be inside the upper and lower bottom surfaces of the metal shell 1, the material of the metal shell 1 is steel, copper, aluminum or nickel, the metal shell 1 in the preferred embodiment is a steel member, the material of the conductor 21 is steel, copper, aluminum or nickel, and the conductor 21 is preferably a copper or aluminum member.
Due to the adoption of the external butt-welding method in the first embodiment, the electric core 2 in the button battery can be welded with the metal shell 1 only by welding the thin electric conductor 21 from the outside, so that the occupied space of the internal structure of the button battery is greatly reduced, the button battery has the advantage of high energy density, the production process of the battery is simplified, and the production cost of the battery is reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. An external butt welding method is characterized by comprising the following steps:
s1, closely attaching the areas of the first conductor and the second conductor which need to be welded to each other in a plane or curved surface mode;
s2, respectively contacting the end faces of the first conductor welding areas with a first welding pin and a second welding pin which are both conductive;
s3, starting a power supply by taking the first welding pin as a positive pole or a negative pole and the second welding pin as a corresponding negative pole or a positive pole, wherein current flows back and forth between the first conductor and the second conductor, and the part of the second conductor in close contact with the first conductor and the part of the first conductor in close contact with the second conductor are heated to form a molten state;
and S4, separating the first welding pin and the second welding pin from the first conductor respectively, wherein a part between the first conductor and the second conductor and in a molten state forms a welding core due to spontaneous heat dissipation.
2. An external butt-welding method according to claim 1, wherein said power source is of an alternating current type, an alternating current inverter type or a transistor type.
3. An external butt-welding method according to claim 1, characterized in that the material of the first conductor is steel, copper, aluminum or nickel.
4. An external butt-welding method according to claim 1, characterized in that the material of the second conductor is steel, copper, aluminum or nickel.
5. A button battery, which comprises a metal shell (1) and an electric core (2) arranged in the metal shell (1), wherein the electric core (2) is provided with an electric conductor (21) electrically connected with the metal shell (1), and the button battery is characterized in that the button battery adopts the external butt-welding method of any one of claims 1 to 5, the metal shell (1) is a first conductor, and the electric conductor (21) is a thin second conductor.
6. A button cell according to claim 5, characterized in that the metal shell (1) is cylindrical in shape, and the side, upper bottom or lower bottom of the metal shell (1) is electrically connected with the conductor (21).
7. Button cell according to claim 5, characterised in that the metal casing (1) is made of steel, copper, aluminium or nickel.
8. An external butt-welding method according to claim 5, characterized in that the material of the electric conductor (21) is steel, copper, aluminum or nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796642.2A CN111922497A (en) | 2020-08-10 | 2020-08-10 | External butt-welding method and button battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796642.2A CN111922497A (en) | 2020-08-10 | 2020-08-10 | External butt-welding method and button battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111922497A true CN111922497A (en) | 2020-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010796642.2A Pending CN111922497A (en) | 2020-08-10 | 2020-08-10 | External butt-welding method and button battery |
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| Country | Link |
|---|---|
| CN (1) | CN111922497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708021A (en) * | 2021-08-02 | 2021-11-26 | 惠州锂威新能源科技有限公司 | Manufacturing method of multi-tab battery and multi-tab battery |
Citations (8)
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| EP2793285A2 (en) * | 2013-04-19 | 2014-10-22 | Zhuhai Zhi Li Battery Co., Ltd. | Rechargeable lithium ion button cell battery |
| CN206250307U (en) * | 2016-11-29 | 2017-06-13 | 珠海市至力电池有限公司 | A kind of chargeable lithium ion button cell |
| US20170187008A1 (en) * | 2009-06-18 | 2017-06-29 | Varta Microbattery Gmbh | Button cell having winding electrode and method for the production thereof |
| CN108448042A (en) * | 2018-03-15 | 2018-08-24 | 重庆市紫建电子有限公司 | A kind of welding manner of steel lid inside lithium ion cell battery core anode |
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2020
- 2020-08-10 CN CN202010796642.2A patent/CN111922497A/en active Pending
Patent Citations (8)
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| EP2793285A2 (en) * | 2013-04-19 | 2014-10-22 | Zhuhai Zhi Li Battery Co., Ltd. | Rechargeable lithium ion button cell battery |
| CN206250307U (en) * | 2016-11-29 | 2017-06-13 | 珠海市至力电池有限公司 | A kind of chargeable lithium ion button cell |
| CN108448042A (en) * | 2018-03-15 | 2018-08-24 | 重庆市紫建电子有限公司 | A kind of welding manner of steel lid inside lithium ion cell battery core anode |
| CN109860498A (en) * | 2019-01-18 | 2019-06-07 | 重庆市紫建电子有限公司 | A kind of pole ear welding method of metal housing battery |
| CN110379990A (en) * | 2019-06-20 | 2019-10-25 | 金能电池(东莞)有限公司 | A kind of button cell without soldering polar ear |
| CN210224197U (en) * | 2019-08-23 | 2020-03-31 | 重庆市紫建电子有限公司 | External welding type winding type button battery |
| CN111370635A (en) * | 2020-04-24 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708021A (en) * | 2021-08-02 | 2021-11-26 | 惠州锂威新能源科技有限公司 | Manufacturing method of multi-tab battery and multi-tab battery |
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Application publication date: 20201113 |
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| RJ01 | Rejection of invention patent application after publication |