CN114083166A - Cell tab bonding wire process and cell tab bonding wire structure - Google Patents
Cell tab bonding wire process and cell tab bonding wire structure Download PDFInfo
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- CN114083166A CN114083166A CN202111295186.4A CN202111295186A CN114083166A CN 114083166 A CN114083166 A CN 114083166A CN 202111295186 A CN202111295186 A CN 202111295186A CN 114083166 A CN114083166 A CN 114083166A
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- welding
- tab
- wire bonding
- wires
- bonding process
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/32—Wires
-
- 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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a battery cell tab wire bonding process and a battery cell tab wire bonding structure, wherein the battery cell tab wire bonding process comprises the following steps: step S1, forming a through hole in the welding area of the tab, and enabling the size of the through hole to be larger than the size of the end face of the welding end of the lead; step S2, enabling the welding ends of the wires to penetrate through the through holes, and smoothing the welding ends of the wires on the front side and the back side of the lug to the surface of the welding area of the lug; and step S3, welding the lead welding ends on the front surface and the back surface of the tab with the tab welding area respectively by using a welding head. Compared with the prior art, the through holes are formed in the lugs, the welding ends of the wires penetrate through the through holes, the welding ends and the front and back sides of the lugs are welded simultaneously, the welding angle of the welding ends can be adjusted randomly according to the width of the lugs, the welding contact surface is increased, the double-side welding effect is more firm compared with the existing single-side welding effect, the phenomenon that the wires fall off is not prone to occurring, and the product quality is effectively improved.
Description
Technical Field
The invention belongs to the technical field of battery manufacturing processes, and particularly relates to a battery cell tab bonding process and a battery cell tab bonding structure.
Background
At present, the bonding wire needs to be carried out to positive and negative pole ear before the equipment of soft-packaged button finished product battery core, and the welding wire comes out the PACK equipment of being convenient for, nevertheless because electric core is very little, and utmost point ear is narrow, if adopt soldering tin volume wayward, adopts laser welding positioning deviation, and the solder joint is not enough, therefore button battery core bonding wire can't use soldering and laser welding. At present, resistance welding is generally selected, as shown in fig. 1, a welding head is adopted to directly make a welding end 41 'of a wire 4' contact with a tab 2 'of an electric core 1' for welding, however, in the resistance welding method, due to the fact that a welding area is small, a contact surface is narrow, welding position deviation or welding current fluctuation in a welding process is caused, welding effects are easily poor, a wire falling phenomenon occurs, risks are high, detection and confirmation cannot be performed on each electric core, even visual welding is qualified, products with poor bonding of actual welding surfaces occur, the wire falling phenomenon occurs after the products flow into a client, customer complaints are easily caused, and batch goods return and rework are caused.
Therefore, in order to improve the quality of the battery cell, it is necessary to develop a new bonding process to improve the bonding strength and avoid the phenomenon of bonding wire falling off from the battery cell.
Disclosure of Invention
In view of the problems existing in the related art, an object of the present application is to provide a cell tab bonding wire process, which can improve the bonding strength of the bonding wire and avoid the phenomenon that the bonding wire falls off from the cell.
In order to achieve the above object, the present application provides a cell tab wire bonding process, which includes the following steps:
step S1, forming a through hole in the welding area of the tab, and enabling the size of the through hole to be larger than the size of the end face of the welding end of the lead;
step S2, enabling the welding ends of the wires to penetrate through the through holes, and smoothing the welding ends of the wires on the front side and the back side of the lug to the surface of the welding area of the lug;
and step S3, welding the lead welding ends on the front surface and the back surface of the tab with the tab welding area respectively by using a welding head.
Preferably, in step S1, the size of the through hole is 0.2 to 0.5mm larger than the size of the end face of the wire bonding end.
Preferably, in step S1, the through hole has a circular, elliptical, polygonal or irregular shape.
Preferably, in step S2, after the welding ends of the wires are smoothed out, an included angle formed between the welding ends on the front side of the tab and the welding ends on the back side of the tab is 0 to 360 °.
Preferably, in step S2, after the lead welding ends are smoothed, an included angle formed between the welding ends on the front side and the welding ends on the back side of the tab is 180 °.
Preferably, in step S2, after the lead welding ends are smoothed, an included angle formed between the welding ends on the front side of the tab and the welding ends on the back side of the tab is 90 °.
Preferably, in step S3, the welding current is set to be 15-30 mA.
Preferably, in step S3, the welding time is set to 0.2-1S.
Preferably, in step S3, the lengths of the wire welding ends on both sides of the tab do not exceed the width of the tab, and the wire welding ends are located in the welding area of the welding head.
Preferably, in step S3, after welding, the welding tension between the tab and the lead welding end is 7-9N.
In addition, the invention also provides a battery cell tab bonding wire structure which is manufactured by adopting the battery cell tab bonding wire process. Compared with the conventional tab bonding wire process for manufacturing the tab bonding wire structure, the tab bonding wire structure manufactured by the tab bonding wire process improves the welding tension by more than half.
Compared with the prior art, the technical scheme provided by the application can at least achieve the following beneficial effects:
according to the invention, the through holes are formed in the lugs, the welding ends of the wires penetrate through the through holes, the welding ends are welded with the front and back sides of the lugs simultaneously, the welding angle of the welding ends can be adjusted randomly according to the width of the lugs, the welding contact surface is increased, and compared with the existing single-side welding effect, the double-side welding effect is firmer, the phenomenon of wire falling is not easy to occur, and the product quality is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a cell tab bonding wire in the prior art.
Fig. 2 is a schematic diagram of a cell tab bonding wire according to an embodiment of the present invention.
Fig. 3 is a schematic view of bonding lines on the front and back sides of a tab according to an embodiment of the invention.
Fig. 4 is a schematic view illustrating bonding lines on the front and back sides of a tab according to another embodiment of the present invention.
In the figure: 1', a battery cell; 2', a tab; 4', a wire; 41', a welding end;
1. an electric core; 2. a tab; 21. the front surface of the tab is provided; 22. the back surface of the tab; 3. a through hole; 4. a wire; 41. welding the end; 5. the welding head welds the area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it should be understood that the term "and/or" used in the present application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element. The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 2 to 4, the present embodiment provides a cell tab bonding process, which includes the following steps:
step S1, forming a through hole 3 in the welding area of the tab 2, and enabling the size of the through hole 3 to be larger than the size of the end face of the welding end 41 of the lead 4;
step S2, enabling the welding ends 41 of the leads 4 to penetrate through the through holes 3, and smoothing the welding ends 41 of the leads 4 on the front side and the back side of the lug 2 to the surface of the welding area of the lug 2;
and step S3, welding the welding ends 41 of the wires 4 on the front and back surfaces of the tab 2 with the welding areas of the tab 2 respectively by using a welding head.
According to the invention, the through hole 3 is arranged on the lug 2, the welding end 41 of the wire 4 penetrates through the through hole 3, the welding end 41 and the front side and the back side of the lug 2 are welded simultaneously, the welding angle of the welding end 41 can be adjusted randomly according to the width of the lug 2, the welding contact surface is increased, the double-side welding effect is firmer than the existing single-side welding effect, the wire 4 is not easy to fall off, the product quality is effectively improved, and compared with the conventional lug 2 wire welding process, the lug 2 wire welding process disclosed by the invention has the advantage that the welding tension is improved by more than half.
In an embodiment of the present invention, in step S1, the size of the through hole 3 is 0.2-0.5 mm larger than the size of the end face of the bonding terminal 41 of the lead 4. Therefore, the tab 2 can pass through the through hole 3 before welding, and is difficult to pass through the through hole 3 freely after being welded to form a flat shape.
In an embodiment according to the present invention, in step S1, the shape of the through hole 3 is a circle, an ellipse, a polygon or an irregular shape. Wherein, the polygon includes but is not limited to triangle, square, rectangle, regular hexagon, etc., and the irregular shape includes closed figure composed of straight line and/or curve besides regular shape. The shape of the through hole 3 is preferably circular, because the welding end 41 of the welded lead 4 is changed from cylindrical to flat, the lead cannot freely pass through the circular through hole 3 on the tab 2, and the lead 4 can be prevented from falling.
In an embodiment of the present invention, in step S2, after the welding end 41 of the lead 4 is smoothed, an included angle formed between the welding end 41 on the tab front surface 21 and the welding end 41 on the tab back surface 22 is 0 to 360 °. For example, 45 °, 90 °, 135 °, 180 °, 360 °, etc., and suitable angle adjustment may be performed as needed to increase the contact area between the welding end 41 of the lead 4 and the tab 2.
In an embodiment of the present invention, as shown in fig. 3, in step S2, after the welding end 41 of the lead wire 4 is smoothed, an included angle formed between the welding end 41 on the front tab surface 21 and the welding end 41 on the back tab surface 22 is 180 °. This method is particularly suitable for the wide tab 2, and the welding ends 41 on the front and back sides of the tab 2 are arranged linearly along the width direction of the tab 2.
In an embodiment of the present invention, as shown in fig. 4, in step S2, after the welding ends 41 of the lead wires 4 are smoothed, an included angle formed between the welding ends 41 on the front tab surface 21 and the welding ends 41 on the back tab surface 22 is 90 °. This mode is particularly useful for the narrower utmost point ear 2 of width, and the welding end 41 of utmost point ear 2 tow sides is perpendicular setting, can avoid the welding end 41 of wire 4 to surpass utmost point ear 2 width like this, and can follow 2 length direction of utmost point ear and increase welding end 41 length like this, promptly, utmost point ear width direction is not enough, extends along utmost point ear length direction to increase area for welding, improve welding strength.
In an embodiment of the present invention, in step S3, the welding current is set to 15 to 30mA, and more preferably 20 to 25 mA; the welding time is set to 0.2-1 s, and more preferably 0.6 s. Too high welding current or too long welding time easily causes the electrode lug 2 to be broken down.
In an embodiment according to the present invention, in step S3, the lengths of the welding ends 41 of the wires 4 on both sides of the tab 2 are not made to exceed the width of the tab 2, and the welding ends 41 of the wires 4 are positioned in the welding area of the welding head.
In an embodiment of the present invention, in step S3, after welding, the welding tension between the tab 2 and the welding end 41 of the lead 4 is 7-9N. The welding tension of the conventional welding end 41 of the tab 2 and the lead 4 is generally 2-4N, so that the tab wire welding process improves the welding tension by more than half and effectively improves the welding strength.
In addition, the invention also provides a battery core tab bonding wire structure, which comprises a battery core and a tab electrically connected to the battery core, wherein the tab is subjected to bonding wire, and the bonding wire structure is prepared by adopting the battery core tab bonding wire process in the embodiment.
Respectively carrying out welding tension tests on a group of wire bonding structures adopting the wire bonding process of the invention and a group of wire bonding structures adopting the traditional single-side wire bonding process, wherein the test results are shown in the following table, wherein the test results are 17 groups in total, and the serial numbers are respectively S1-S17:
| numbering | Welding pull force of traditional wire welding mode (N) | Welding pull force (N) of the invention in wire welding mode |
| S1 | 2.6 | 7.6 |
| S2 | 2.8 | 7.5 |
| S3 | 3.4 | 7.3 |
| S4 | 4.5 | 8.9 |
| S5 | 3.6 | 8.2 |
| S6 | 4.5 | 8.4 |
| S7 | 4.5 | 8.5 |
| S8 | 4.7 | 7.9 |
| S9 | 3.1 | 7.8 |
| S10 | 1.2 | 7.9 |
| S11 | 1.3 | 7.3 |
| S12 | 3.5 | 8.0 |
| S13 | 3.5 | 7.9 |
| S14 | 3.4 | 8.2 |
| S15 | 3.4 | 8.3 |
| S16 | 3.6 | 8.5 |
| S17 | 2.5 | 8.4 |
According to the test results, compared with the traditional tab wire bonding process, the tab wire bonding process provided by the invention has the advantages that the welding tension is basically improved by more than half, so that the tab wire bonding process provided by the invention can effectively improve the welding strength, and the phenomenon of wire bonding falling is effectively avoided.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A process for welding wires to battery cell tabs is characterized by comprising the following steps:
step S1, forming a through hole in the welding area of the tab, and enabling the size of the through hole to be larger than the size of the end face of the welding end of the lead;
step S2, enabling the welding ends of the wires to penetrate through the through holes, and smoothing the welding ends of the wires on the front side and the back side of the lug to the surface of the welding area of the lug;
and step S3, welding the lead welding ends on the front surface and the back surface of the tab with the tab welding area respectively by using a welding head.
2. The cell tab wire bonding process of claim 1, wherein: in step S1, the size of the through hole is 0.2-0.5 mm larger than the size of the end face of the lead welding end.
3. The cell tab wire bonding process of claim 1, wherein: in step S1, the shape of the through hole is circular, elliptical, polygonal, or irregular.
4. The cell tab wire bonding process of claim 1, wherein: in step S2, after the welding ends of the wires are smoothed out, an included angle formed between the welding ends on the front side and the welding ends on the back side of the tab is 0-360 °.
5. The cell tab wire bonding process of claim 4, wherein: in step S2, after the welding ends of the wires are smoothed, an included angle of 180 ° is formed between the welding ends on the front side and the welding ends on the back side of the tab.
6. The cell tab wire bonding process of claim 4, wherein: in step S2, after the welding ends of the wires are smoothed, an included angle formed between the welding ends on the front side and the welding ends on the back side of the tab is 90 °.
7. The cell tab wire bonding process of claim 1, wherein: in step S3, the welding current is set to be 15-30 mA, and the welding time is set to be 0.2-1S.
8. The cell tab wire bonding process of claim 1, wherein: in step S3, the lengths of the lead welding ends on the front and back sides of the tab do not exceed the width of the tab, and the lead welding ends are located in the welding area of the welding head.
9. The cell tab wire bonding process of claim 1, wherein: in the step S3, after welding, the welding tension between the tab and the welding end of the lead is 7-9N.
10. The utility model provides a battery core utmost point ear bonding wire structure which characterized in that: the battery core tab wire bonding process is manufactured by adopting the battery core tab wire bonding process as defined in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295186.4A CN114083166A (en) | 2021-11-03 | 2021-11-03 | Cell tab bonding wire process and cell tab bonding wire structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295186.4A CN114083166A (en) | 2021-11-03 | 2021-11-03 | Cell tab bonding wire process and cell tab bonding wire structure |
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| CN114083166A true CN114083166A (en) | 2022-02-25 |
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| CN202111295186.4A Pending CN114083166A (en) | 2021-11-03 | 2021-11-03 | Cell tab bonding wire process and cell tab bonding wire structure |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291813A (en) * | 1999-07-30 | 2001-04-18 | 富士康(昆山)电脑接插件有限公司 | Method for electrically connecting coaxial cable to circuit board |
| CN1589093A (en) * | 2004-08-13 | 2005-03-02 | 广州金升阳科技有限公司 | Method for improving fine enamelled wire spot welding strengh in spot welding |
| CN101925248A (en) * | 2009-06-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Circuit board and method for fixing wire on same |
| CN202423439U (en) * | 2011-12-30 | 2012-09-05 | 广东国光电子有限公司 | Connecting structure of lithium ion battery pole lug and wire |
| CN203288678U (en) * | 2013-05-21 | 2013-11-13 | 东莞新能源科技有限公司 | Welding structure for core connecting sheet and anode lug |
| WO2015184940A1 (en) * | 2014-06-05 | 2015-12-10 | 江苏华东锂电技术研究院有限公司 | Battery pack having tab connection device |
| CN105374975A (en) * | 2015-11-24 | 2016-03-02 | 苏州新中能源科技有限公司 | Cell tab welding method |
| CN111293270A (en) * | 2020-02-25 | 2020-06-16 | 四川国创成电池材料有限公司 | Battery core tab connection structure, soft-packaged battery, electric equipment, electric vehicle and power station |
| CN211404657U (en) * | 2019-12-17 | 2020-09-01 | 深圳市聚和源科技有限公司 | Button type polymer battery |
-
2021
- 2021-11-03 CN CN202111295186.4A patent/CN114083166A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291813A (en) * | 1999-07-30 | 2001-04-18 | 富士康(昆山)电脑接插件有限公司 | Method for electrically connecting coaxial cable to circuit board |
| CN1589093A (en) * | 2004-08-13 | 2005-03-02 | 广州金升阳科技有限公司 | Method for improving fine enamelled wire spot welding strengh in spot welding |
| CN101925248A (en) * | 2009-06-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Circuit board and method for fixing wire on same |
| CN202423439U (en) * | 2011-12-30 | 2012-09-05 | 广东国光电子有限公司 | Connecting structure of lithium ion battery pole lug and wire |
| CN203288678U (en) * | 2013-05-21 | 2013-11-13 | 东莞新能源科技有限公司 | Welding structure for core connecting sheet and anode lug |
| WO2015184940A1 (en) * | 2014-06-05 | 2015-12-10 | 江苏华东锂电技术研究院有限公司 | Battery pack having tab connection device |
| CN105374975A (en) * | 2015-11-24 | 2016-03-02 | 苏州新中能源科技有限公司 | Cell tab welding method |
| CN211404657U (en) * | 2019-12-17 | 2020-09-01 | 深圳市聚和源科技有限公司 | Button type polymer battery |
| CN111293270A (en) * | 2020-02-25 | 2020-06-16 | 四川国创成电池材料有限公司 | Battery core tab connection structure, soft-packaged battery, electric equipment, electric vehicle and power station |
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