CN111668438A - Cylindrical battery cell welding method - Google Patents
Cylindrical battery cell welding method Download PDFInfo
- Publication number
- CN111668438A CN111668438A CN202010549370.6A CN202010549370A CN111668438A CN 111668438 A CN111668438 A CN 111668438A CN 202010549370 A CN202010549370 A CN 202010549370A CN 111668438 A CN111668438 A CN 111668438A
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- CN
- China
- Prior art keywords
- spot welding
- battery cell
- nickel sheet
- welding
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 52
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000006748 scratching Methods 0.000 abstract 1
- 230000002393 scratching effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000009984 Pterocarpus indicus Nutrition 0.000 description 1
- 241000533793 Tipuana tipu Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a cylindrical battery cell welding method, which comprises the following steps: (1) spot welding nickel sheets are formed by bending and spot welding at 90 degrees, so that the spot welding nickel sheets are L-shaped; (2) aligning two end faces of the spot welding nickel sheet to the end faces of the battery cell A and the battery cell B respectively; (3) spot welding one end face of the spot welding nickel sheet on the battery core A; (3) after the electrical core A and the spot welding nickel sheet are subjected to spot welding, rotating the electrical core A by 90 degrees to rotate the electrical core B which is originally transversely placed to the vertical direction, and then fixing the transverse electrical core B and the other end face of the spot welding nickel sheet in a spot welding manner; (4) after the battery cell A and the battery cell B are respectively fixed with the spot welding nickel sheet in a spot welding mode, the spot welding nickel sheet is bent, so that the battery cell A and the battery cell B are bent to form a connection state of head-tail series connection, and the middle bent connection position forms the spot welding nickel sheet without protrusion. The invention avoids short circuit of the projection of the spot welding nickel sheet after the welding head and the tail of the single-group or multi-group battery cell series connection are bent, and simultaneously can prevent the projected spot welding nickel sheet from scratching other battery cells.
Description
Technical Field
The invention relates to a method for welding a cylindrical battery cell.
Background
With the great development of the new energy field, more and more battery cores in the battery product are connected in groups by adopting a series-parallel connection scheme. In the welding scheme process of the cylindrical battery, when the external space requires that the battery cells are in a head-tail connection state in the serial and parallel connection process of the battery cells, how to keep the regularity and the safety of nickel sheet connection in the serial and parallel connection process is a worthy discussion issue for the current spot welding scheme.
The rectangular series-parallel connection scheme of traditional cylinder electricity core is: as shown in fig. 1-3, a nickel flat sheet is adopted to be welded on the upper end surfaces of two adjacent electric cores in a horizontal spot welding manner, and the horizontal spot welding is carried out from top to bottom; after spot welding is finished, bending the nickel sheet, and folding the right battery cell for 90 degrees to enable the two battery cells to be in a straight line connection state of head-to-tail connection; such connected mode causes the nickel piece protrusion of two electric core intermediate junctions easily, forms the short circuit risk easily after the nickel piece protrusion, simultaneously, still fish tail other electric cores easily, causes electric core to damage.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is that when two battery cores are bent to be in a head-tail connection state, the bent connection part in the middle forms a nickel sheet protrusion, so that short circuit risk is easy to form, and meanwhile, the protruding nickel sheet is easy to scratch other battery cores to cause damage.
The invention is formed in such a way, and comprises the following steps: (1) firstly, spot welding nickel sheets are formed by bending and spot welding at 90 degrees, so that the spot welding nickel sheets are L-shaped; (2) aligning two end faces of the spot welding nickel sheet to the end faces of the battery cell A and the battery cell B respectively; (3) firstly, spot welding is carried out on a vertically placed battery core A, and one end face of a spot welding nickel sheet is fixed on the battery core A in a spot welding mode; (3) after the electrical core A and the spot welding nickel sheet are subjected to spot welding, rotating the electrical core A by 90 degrees to rotate the electrical core B which is originally transversely placed to the vertical direction, and then fixing the transverse electrical core B and the other end face of the spot welding nickel sheet in a spot welding manner; (4) after the battery cell A and the battery cell B are respectively fixed with spot welding nickel sheets in a spot welding mode, the battery cell A and the battery cell B are rotated to be in a straight line shape, the spot welding nickel sheets are bent, the battery cell A and the battery cell B are bent to form a head-tail connection state, and the middle bending joint is formed in the spot welding nickel sheets without protrusions.
Further, the 90-degree bending spot welding in the step (1) adopts a battery core spot welding tool to carry out spot welding, so that the convenience in welding is facilitated.
Further, the spot welding is completed by welding equipment for welding in the vertical direction by resistance welding or laser spot welding.
Further, the lateral part of the battery cell spot welding tool is provided with a notch for exposing the spot welding nickel sheet.
Further, electric core spot welding frock includes the lower mould and with the last mould of lower mould longitudinal symmetry setting, be equipped with two mutually perpendicular on the lower mould and be used for placing the constant head tank of two electric cores respectively, the crossing position of two constant head tanks is equipped with the square groove, the square groove communicates with two constant head tanks respectively.
Compared with the prior art, the invention has the following beneficial effects: the invention has simple structure and reasonable design, avoids the risk that the nickel sheet protrudes to scratch other electric cores due to short circuit after the connection and bending of the welding heads and the tails of the single-group or multi-group electric core series connection are finished, and has wide application prospect.
Drawings
FIG. 1 is a first schematic view of a conventional welding structure according to the present invention;
FIG. 2 is a schematic view of a conventional welding structure of the present invention;
FIG. 3 is a partial enlarged view A of FIG. 2;
FIG. 4 is an exploded view of an embodiment of the present invention;
FIG. 5 is a schematic view of a lower mold structure according to an embodiment of the present invention;
fig. 6 is an external structural schematic diagram of a cell spot welding tool according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a series structure of a battery cell a and a battery cell B according to an embodiment of the present invention.
In the figure: 1-spot welding of a nickel sheet, 2-cell A, 3-cell B, 4-cell spot welding of a tool, 41-slotting, 42-upper die, 43-lower die, 431-locating slot and 432-square slot.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b): as shown in fig. 4 to 7, in this embodiment, a method for welding a cylindrical battery cell includes the following steps: (1) firstly, spot welding nickel sheets are formed by bending and spot welding at 90 degrees, so that the spot welding nickel sheets 1 are in an L shape; (2) aligning two end faces of the spot welding nickel sheet to the end faces of the battery cell A2 and the battery cell B3 respectively; (3) firstly, spot welding is carried out on a vertically placed battery core A, and one end face of a spot welding nickel sheet is fixed on the battery core A in a spot welding mode; (3) after the electrical core A and the spot welding nickel sheet are subjected to spot welding, rotating the electrical core A by 90 degrees to rotate the electrical core B which is originally transversely placed to the vertical direction, and then fixing the transverse electrical core B and the other end face of the spot welding nickel sheet in a spot welding manner; (4) after the battery cell A and the battery cell B are respectively fixed with spot welding nickel sheets in a spot welding mode, the battery cell A and the battery cell B are rotated to be in a straight line shape, the spot welding nickel sheets are bent, the battery cell A and the battery cell B are bent to form a connection state of head-tail series connection, and the middle bending connection position forms the spot welding nickel sheets without protrusions.
In the embodiment, the 90-degree bending spot welding in the step (1) adopts a cell spot welding tool to perform spot welding, so that the convenience in welding is facilitated; 90 welding of buckling can utilize electric core spot welding frock to carry out spacing spot welding again in two directions to electric core and form.
In this embodiment, the spot welding is performed by using a welding device that performs welding in the vertical direction by resistance welding or laser spot welding.
In this embodiment, the side portion of the electrical core spot welding tool is provided with a slot 41 for exposing the spot welding nickel sheet.
In this embodiment, electric core spot welding frock includes lower mould 43 and the last mould 42 that sets up with lower mould longitudinal symmetry, be equipped with two mutually perpendicular on the lower mould and be used for placing the constant head tank 431 of two electric cores respectively, the crossing position of two constant head tanks is equipped with square groove 432, the square groove communicates with two constant head tanks respectively.
In this embodiment, the electric core spot welding tool can be machined by a CNC machine from materials made of insulation materials such as rosewood and acrylic.
In this embodiment, the spot welding nickel sheet is a die opening fixed part, and may be formed by pure nickel or other materials with good welding performance, electrical performance and bending performance.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (5)
1. A cylindrical battery core welding method is characterized by comprising the following steps: (1) firstly, spot welding nickel sheets are formed by bending and spot welding at 90 degrees, so that the spot welding nickel sheets are L-shaped; (2) aligning two end faces of the spot welding nickel sheet to the end faces of the battery cell A and the battery cell B respectively; (3) firstly, spot welding is carried out on a vertically placed battery core A, and one end face of a spot welding nickel sheet is fixed on the battery core A in a spot welding mode; (3) after the electrical core A and the spot welding nickel sheet are subjected to spot welding, rotating the electrical core A by 90 degrees to rotate the electrical core B which is originally transversely placed to the vertical direction, and then fixing the transverse electrical core B and the other end face of the spot welding nickel sheet in a spot welding manner; (4) after the battery cell A and the battery cell B are respectively fixed with spot welding nickel sheets in a spot welding mode, the battery cell A and the battery cell B are rotated to be in a straight line shape, the spot welding nickel sheets are bent, the battery cell A and the battery cell B are bent to form a connection state of head-tail series connection, and the middle bending connection position forms the spot welding nickel sheets without protrusions.
2. The cylindrical cell series electric welding method of claim 1, wherein the 90 ° bending spot welding in step (1) is performed by using a cell spot welding tool to facilitate welding.
3. The method of claim 1, wherein the spot welding is performed by a welding device that welds vertically by resistance welding or laser spot welding.
4. The cylindrical battery cell welding method of claim 2, wherein the side of the battery cell spot welding tool is provided with a slot for exposing a spot welding nickel sheet.
5. The cylindrical battery cell welding method of claim 2, wherein the battery cell spot welding tool comprises a lower die and an upper die which is arranged vertically and symmetrically with the lower die, two positioning grooves which are perpendicular to each other and are used for respectively placing two battery cells are arranged on the lower die, a square groove is arranged at the intersection position of the two positioning grooves, and the square groove is respectively communicated with the two positioning grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549370.6A CN111668438A (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery cell welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549370.6A CN111668438A (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery cell welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111668438A true CN111668438A (en) | 2020-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010549370.6A Pending CN111668438A (en) | 2020-06-16 | 2020-06-16 | Cylindrical battery cell welding method |
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| Country | Link |
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| CN (1) | CN111668438A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114571124A (en) * | 2022-04-07 | 2022-06-03 | 三一技术装备有限公司 | Battery cell welding position determining method and battery module manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135662A (en) * | 1994-12-16 | 1996-11-13 | 松下电器产业株式会社 | Method for manufacturing group-type cell |
| JP2004227954A (en) * | 2003-01-23 | 2004-08-12 | Sony Corp | Reed terminal and power supply device |
| CN1757138A (en) * | 2003-01-23 | 2006-04-05 | 索尼株式会社 | Lead terminal and power supply device |
| CN102201591A (en) * | 2010-03-26 | 2011-09-28 | 松下电器产业株式会社 | Battery module and method of manufacturing the same |
| CN206286760U (en) * | 2016-12-27 | 2017-06-30 | 东莞纳普能源科技有限公司 | A kind of 18650 cylindrical battery spot welding tools |
-
2020
- 2020-06-16 CN CN202010549370.6A patent/CN111668438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135662A (en) * | 1994-12-16 | 1996-11-13 | 松下电器产业株式会社 | Method for manufacturing group-type cell |
| JP2004227954A (en) * | 2003-01-23 | 2004-08-12 | Sony Corp | Reed terminal and power supply device |
| CN1757138A (en) * | 2003-01-23 | 2006-04-05 | 索尼株式会社 | Lead terminal and power supply device |
| CN102201591A (en) * | 2010-03-26 | 2011-09-28 | 松下电器产业株式会社 | Battery module and method of manufacturing the same |
| CN206286760U (en) * | 2016-12-27 | 2017-06-30 | 东莞纳普能源科技有限公司 | A kind of 18650 cylindrical battery spot welding tools |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114571124A (en) * | 2022-04-07 | 2022-06-03 | 三一技术装备有限公司 | Battery cell welding position determining method and battery module manufacturing method |
| CN114571124B (en) * | 2022-04-07 | 2024-01-30 | 三一技术装备有限公司 | Battery cell welding position determining method and battery module manufacturing method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200915 |
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| RJ01 | Rejection of invention patent application after publication |