CN112382831B - A utmost point ear and utmost point ear welding set for laminate polymer battery - Google Patents
A utmost point ear and utmost point ear welding set for laminate polymer battery Download PDFInfo
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- CN112382831B CN112382831B CN202010941720.3A CN202010941720A CN112382831B CN 112382831 B CN112382831 B CN 112382831B CN 202010941720 A CN202010941720 A CN 202010941720A CN 112382831 B CN112382831 B CN 112382831B
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- oil
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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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
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- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention discloses a tab for a soft package battery and a tab welding device, wherein the tab comprises a tab body, and one end of the tab body is provided with two bifurcate pieces; the tab welding device comprises a base, wherein a stand column is arranged on the base, an ultrasonic welding device is arranged on the stand column, and a liftable welding head is arranged on the ultrasonic welding device; be provided with the locating piece on the base, be provided with the utmost point ear constant head tank that is used for placing the electric core constant head tank of electric core and is used for placing utmost point ear on the locating piece. The invention can effectively reduce or avoid the probability of breaking or perforating the pole piece foil during welding and improve the welding quality.
Description
Technical Field
The invention relates to the technical field of soft package batteries, in particular to a tab for a soft package battery and a tab welding device.
Background
A pouch battery is a battery that is commonly used at present. The soft package battery comprises an electric core and a tab, wherein a plurality of layers of pole piece foils are arranged on the electric core, and the tab is welded on the pole piece foils. The tab of the conventional pouch battery is generally a metal sheet, and when the tab is welded, the tab is generally welded by an ultrasonic welding device. The ultrasonic welding device comprises a liftable welding head and a base located below the welding head, when the ultrasonic welding device is used, two objects (or a plurality of objects) to be welded are placed on the base, the welding head descends to compress the two objects to be welded, and then under the action of ultrasonic energy, the contact surface of the objects to be welded is subjected to high-temperature melting and mutual fusion, so that the two objects are welded together.
When welding the pole lug, firstly, the superposed multilayer pole piece foils are welded once through the ultrasonic welding device, the purpose is to enable the multilayer pole piece foils to be combined preliminarily and then to be welded secondarily, and the secondary welding is to weld the pole lug on the preliminarily combined pole piece foils, so that the whole welding process is completed. Because the thickness of the current pole piece foil is extremely thin (copper foil is generally only 6-10 microns, aluminum foil is generally only 12-20 microns), when welding is carried out, the pole piece foil at the welding area is easy to break, perforate and the like under the action of ultrasonic vibration, and the welding quality is affected.
Disclosure of Invention
The invention aims to solve the problem that when a tab is welded in the existing soft package battery, a pole piece foil at a welding area is easy to break, perforate and the like under the action of ultrasonic vibration, and the welding quality is influenced, and provides a tab and a tab welding device for the soft package battery, which can effectively solve the problem.
The purpose of the invention is realized by the following technical scheme: the utility model provides a utmost point ear for laminate polymer battery, includes utmost point ear body, and the one end of utmost point ear body is provided with two branching pieces.
In the invention, one end of the tab body is provided with two bifurcate pieces, and the preliminarily combined pole piece foil is clamped between the two bifurcate pieces during welding, so that the two bifurcate pieces are positioned at two sides of the pole piece foil during welding, the pole piece foil which is relatively fragile in the middle can be well protected, the probability of breakage or perforation of the pole piece foil during welding is reduced or avoided, and the welding quality is improved.
Preferably, the bifurcating piece and the tab body are integrally formed.
Preferably, the thickness of the bifurcated blade is 0.05 mm or greater.
A tab welding device comprises a base, wherein a stand column is arranged on the base, an ultrasonic welding device is arranged on the stand column, and a lifting welding head is arranged on the ultrasonic welding device; be provided with the locating piece on the base, be provided with the electric core constant head tank that is used for placing electric core and the utmost point ear constant head tank that is used for placing utmost point ear on the locating piece.
This device is exclusively used in welding the utmost point ear structure that records in this application. When the device is used, the battery cell is firstly placed in the battery cell positioning groove, the tab is placed in the tab positioning groove, the pole piece foil on the battery cell is placed between the two forked pieces on the tab, then the welding head descends to be in compression contact with the tab, the two forked pieces are compressed with the pole piece foil, and the tab is welded on the pole piece foil under the action of ultrasonic energy. Cell positioning groove and utmost point ear positioning groove can fix a position cell and utmost point ear respectively, guarantee that utmost point ear can accurately weld on the cell.
Preferably, the base is connected with a sliding seat in a sliding manner, the sliding seat is provided with a guide rod in the vertical direction, and the positioning block is connected to the guide rod in a sliding manner; a second cylinder body is arranged on the sliding seat, a second piston is arranged in the second cylinder body, a second oil cavity is formed between the second piston and one end in the second cylinder body, a spring is arranged between the second piston and one end in the second cylinder body, a second piston rod is connected to the second piston, and the second piston rod is connected with the positioning block; a first cylinder body is arranged on the base, a first piston is arranged in the first cylinder body, a first oil cavity is formed between the first piston and one end in the first cylinder body, a first piston rod is connected to the first piston, and the first piston rod is connected with the sliding seat; the base is also provided with an oil tank, the first oil chamber is connected with the second oil chamber through a first oil pipe, and the first oil pipe is provided with a first one-way valve; the second oil cavity is connected with the oil tank through a second oil pipe, and a second one-way valve is arranged on the second oil pipe; the first oil cavity is connected with the oil tank through a third oil pipe, and a switch valve is arranged on the third oil pipe. The oil tank is filled with hydraulic oil. During welding, in order to ensure the welding firmness, a plurality of points need to be uniformly welded along the length direction of the pole lug. When the welding head descends, the positioning block moves downwards for a certain distance under the downward pressure of the welding head, the positioning block drives the second piston rod and the second piston to move downwards in the descending process, the volume of the second oil cavity is increased in the downward moving process of the second piston, the second oil cavity sucks hydraulic oil from the oil tank through the second oil pipe, after the first welding is completed, the welding head ascends, the spring pushes the second piston upwards to enable the second piston and the second piston rod to ascend, the positioning block is pushed to ascend until the initial position is reached, the hydraulic oil in the second oil cavity enters the first oil cavity through the first oil pipe at the moment, the first piston and the first piston rod are pushed to move forwards for a certain distance, the sliding seat and the positioning block are pushed to move forwards for a certain distance, and the lug also moves forwards for a certain distance accordingly, and then the welding head descends to perform second welding, and the like until the required welding times are reached, after the welding is completed, the soft package battery is welded and completed by taking down the positioning block, the positioning block can be pushed back to the initial position in a manual mode, the switch valve is opened firstly before the positioning block is pushed, so that the first piston is driven to reset in the process of pushing back the initial position by the positioning block, the hydraulic oil in the first oil cavity flows back to the oil tank, and finally the switch valve is closed. The first check valve arranged on the first oil pipe ensures that hydraulic oil can only flow into the first oil chamber from the second oil chamber and cannot flow into the second oil chamber from the first oil chamber, and the second check valve arranged on the second oil pipe ensures that hydraulic oil can only flow into the second oil chamber from the oil tank and cannot flow into the oil tank from the second oil chamber. After the device is welded at each time, the positioning block can automatically move forwards for a certain distance, so that a plurality of points can be uniformly welded in the length direction of the lug conveniently.
Preferably, the base is provided with a guide rail, and the sliding seat is connected to the guide rail in a sliding manner. The sliding seat can slide along the guide rail. The arrangement direction of the guide rail is parallel to the first piston rod.
Preferably, the positioning block is provided with a guide hole matched with the guide rod, and the guide rod penetrates through the guide hole.
Preferably, the guide rod is provided with an upper limit end and a lower limit end. Through set up spacing end and lower spacing end on the guide bar, can play limiting displacement to reciprocating of locating piece.
The invention has the beneficial effects that: in the invention, one end of the tab body is provided with two bifurcate pieces, and the preliminarily combined pole piece foil is clamped between the two bifurcate pieces during welding, so that the pole piece foil which is relatively fragile in the middle can be well protected, the probability of breakage or perforation of the pole piece foil during welding is reduced or avoided, and the welding quality is improved.
Drawings
Fig. 1 is a front view of a pouch battery.
Fig. 2 is a side view of a pouch cell.
Fig. 3 is a schematic structural view of the tab.
Fig. 4 is a schematic structural view of a tab welding device.
Fig. 5 is an enlarged view of a portion a in fig. 4.
Fig. 6 is a schematic structural diagram of the positioning block.
In the figure: 1. the electrode assembly comprises a battery cell, 2, a pole piece foil, 3, a pole lug, 4, a pole lug body, 5, a bifurcation piece, 6, a base, 7, a column, 8, an ultrasonic welding device, 9, a welding head, 10, a guide rail, 11, a sliding seat, 12, a positioning block, 13, a battery cell positioning groove, 14, a guide rod, 15, an upper limiting end, 16, a lower limiting end, 17, a first cylinder body, 18, a first piston, 19, a first oil cavity, 20, a first piston rod, 21, an oil tank, 22, a first oil pipe, 23, a first check valve, 24, a second oil pipe, 25, a second check valve, 26, a third oil pipe, 27, a switch valve, 28, a second cylinder body, 29, a second piston, 30, a second oil cavity, 31, a spring, 32, a second piston rod, 33, a pole lug positioning groove, 34 and a guide hole.
Detailed Description
The invention is further described by the following detailed description in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 3, a tab for a soft package battery comprises a tab body 4, and two bifurcating pieces 5 are arranged at one end of the tab body 4. The bifurcate piece 5 and the tab body 4 are integrally formed. The thickness of the bifurcating blade 5 is 0.05 mm or more. When welding, the preliminarily combined pole piece foil 2 is clamped between the two forked pieces, so that when welding, the two forked pieces 5 are positioned on two sides of the pole piece foil 2, the pole piece foil which is relatively fragile in the middle can be well protected, and the probability of breakage or perforation of the pole piece foil during welding is reduced or avoided.
As shown in fig. 4 to 6, a tab welding device for welding the tab comprises a base 6, wherein a column 7 is arranged on the base 6, and an ultrasonic welding device 8 is arranged on the column 7. The ultrasonic welding device 8 is a prior art, and the specific structure thereof can be found in patent publication No. CN 106945292A. The ultrasonic welding device 8 is provided with a welding head 9 which can be lifted. The base 6 is provided with a guide rail 10, and the guide rail 10 is connected with a sliding seat 11 in a sliding manner. The sliding seat 11 is provided with a guide rod 14 arranged in the vertical direction, and the guide rod 14 is connected with a positioning block 12 capable of sliding along the guide rod. The positioning block 12 is provided with a guide hole 34 engaged with the guide bar 14, and the guide bar 14 passes through the guide hole 34. The guide rod 14 is provided with an upper limit end 15 and a lower limit end 16. The positioning block 12 is provided with a battery cell positioning groove 13 for placing a battery cell 1 and a tab positioning groove 33 for placing a tab 3.
The sliding seat 11 is provided with a second cylinder 28, a second piston 29 is arranged in the second cylinder 28, a second oil chamber 30 is formed between the second piston 29 and one end in the second cylinder 28, and a spring 31 is arranged between the second piston 29 and one end in the second cylinder 28. A second piston rod 32 is connected to the second piston 29, and the second piston rod 32 is disposed in a vertical direction. The second piston rod 32 is connected to the positioning block 12. A first cylinder body 17 is arranged on the base 11, a first piston 18 is arranged in the first cylinder body 17, a first oil chamber 19 is formed between the first piston 18 and one end in the first cylinder body 17, a first piston rod 20 is connected to the first piston 18, and the first piston rod 20 is connected with the sliding seat 11. The first piston rod 20 is parallel to the guide rail 10. The base 6 is further provided with an oil tank 21, the first oil chamber 19 is connected with the second oil chamber 30 through a first oil pipe 22, and the first oil pipe 22 is provided with a first one-way valve 23. The second oil chamber 30 is connected with the oil tank 21 through a second oil pipe 24, and a second one-way valve 25 is arranged on the second oil pipe 24. The first oil chamber 19 is connected with the oil tank 21 through a third oil pipe 26, and a switch valve 27 is arranged on the third oil pipe 26.
This utmost point ear welding set is exclusively used in and welds the utmost point ear structure that records in this application. When the device is used, the battery cell is firstly placed in the battery cell positioning groove, the tab is placed in the tab positioning groove, the pole piece foil on the battery cell is placed between the two forked pieces on the tab, then the welding head descends to be in compression contact with the tab, the two forked pieces are compressed with the pole piece foil, and the tab is welded on the pole piece foil under the action of ultrasonic energy. The battery cell positioning groove and the lug positioning groove can be used for positioning the battery cell and the lug respectively, and the lug can be accurately welded on the battery cell. The oil tank is filled with hydraulic oil. During welding, in order to ensure the welding firmness, a plurality of points need to be uniformly welded along the length direction of the pole lug. When the welding head descends, the positioning block moves downwards for a certain distance under the downward pressure of the welding head, the positioning block drives the second piston rod and the second piston to move downwards in the descending process, the volume of the second oil cavity is increased in the downward moving process of the second piston, the second oil cavity sucks hydraulic oil from the oil tank through the second oil pipe, after the first welding is completed, the welding head ascends, the spring pushes the second piston upwards to enable the second piston and the second piston rod to ascend, the positioning block is pushed to ascend until the initial position is reached, the hydraulic oil in the second oil cavity enters the first oil cavity through the first oil pipe at the moment, the first piston and the first piston rod are pushed to move forwards for a certain distance, the sliding seat and the positioning block are pushed to move forwards for a certain distance, and the lug also moves forwards for a certain distance accordingly, and then the welding head descends to perform second welding, and the like until the required welding times are reached, after the welding is completed, the soft package battery is welded and completed by taking down the positioning block, the positioning block can be pushed back to the initial position in a manual mode, the switch valve is opened firstly before the positioning block is pushed, so that the first piston is driven to reset in the process of pushing back the initial position by the positioning block, the hydraulic oil in the first oil cavity flows back to the oil tank, and finally the switch valve is closed. The first check valve arranged on the first oil pipe ensures that hydraulic oil can only flow into the first oil chamber from the second oil chamber and cannot flow into the second oil chamber from the first oil chamber, and the second check valve arranged on the second oil pipe ensures that hydraulic oil can only flow into the second oil chamber from the oil tank and cannot flow into the oil tank from the second oil chamber. After the device is welded at each time, the positioning block can automatically move forwards for a certain distance, so that a plurality of points can be uniformly welded in the length direction of the lug conveniently.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a utmost point ear welding set for laminate polymer battery utmost point ear's welding, its characterized in that: the pole lug comprises a pole lug body, one end of the pole lug body is provided with two bifurcate pieces, the pole lug welding device comprises a base, a stand column is arranged on the base, an ultrasonic welding device is arranged on the stand column, and a liftable welding head is arranged on the ultrasonic welding device; a positioning block is arranged on the base, and a battery cell positioning groove for placing a battery cell and a tab positioning groove for placing a tab are arranged on the positioning block; the base is connected with a sliding seat in a sliding manner, the sliding seat is provided with a guide rod in the vertical direction, and the positioning block is connected to the guide rod in a sliding manner; a second cylinder body is arranged on the sliding seat, a second piston is arranged in the second cylinder body, a second oil cavity is formed between the second piston and one end in the second cylinder body, a spring is arranged between the second piston and one end in the second cylinder body, a second piston rod is connected to the second piston, and the second piston rod is connected with the positioning block; a first cylinder body is arranged on the base, a first piston is arranged in the first cylinder body, a first oil cavity is formed between the first piston and one end in the first cylinder body, a first piston rod is connected to the first piston, and the first piston rod is connected with the sliding seat; the base is also provided with an oil tank, the first oil chamber is connected with the second oil chamber through a first oil pipe, the first oil pipe is provided with a first one-way valve, and the first one-way valve enables hydraulic oil to only flow from the second oil chamber to the first oil chamber in a one-way mode; the second oil cavity is connected with the oil tank through a second oil pipe, a second one-way valve is arranged on the second oil pipe, and the second one-way valve only enables one-way flow of hydraulic oil from the oil tank to the second oil cavity; the first oil cavity is connected with the oil tank through a third oil pipe, and a switch valve is arranged on the third oil pipe.
2. The tab welding device as claimed in claim 1, wherein the base has a guide rail, and the sliding seat is slidably connected to the guide rail.
3. A tab welding device as claimed in claim 1, wherein the positioning block is provided with a guide hole to be fitted with the guide bar, and the guide bar is inserted through the guide hole.
4. The tab welding device according to claim 1, wherein the guide bar is provided with an upper limit end and a lower limit end.
5. The tab welding device according to claim 1, wherein the bifurcating pieces are integrally formed with the tab body.
6. A tab welding device as claimed in claim 1, wherein the thickness of the bifurcated blade is 0.05 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941720.3A CN112382831B (en) | 2020-09-09 | 2020-09-09 | A utmost point ear and utmost point ear welding set for laminate polymer battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941720.3A CN112382831B (en) | 2020-09-09 | 2020-09-09 | A utmost point ear and utmost point ear welding set for laminate polymer battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112382831A CN112382831A (en) | 2021-02-19 |
| CN112382831B true CN112382831B (en) | 2022-09-06 |
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| CN202010941720.3A Active CN112382831B (en) | 2020-09-09 | 2020-09-09 | A utmost point ear and utmost point ear welding set for laminate polymer battery |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535796B (en) * | 2021-11-02 | 2023-08-15 | 万向一二三股份公司 | Method for welding tabs on two sides of battery cell |
| CN114544336B (en) * | 2021-11-08 | 2023-08-15 | 万向一二三股份公司 | Method for representing welding tension of soft-package battery cell lugs of multi-layer lamination |
| CN114141982B (en) * | 2021-11-30 | 2023-09-05 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
| CN115395186A (en) * | 2022-07-01 | 2022-11-25 | 岳阳耀宁新能源科技有限公司 | Square lithium ion battery with staggered lugs and lug welding device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5353032B2 (en) * | 2007-07-11 | 2013-11-27 | 日産自動車株式会社 | Stacked battery |
| JP5135368B2 (en) * | 2010-03-15 | 2013-02-06 | 日立ビークルエナジー株式会社 | Square battery and method for manufacturing the same |
| WO2013105361A1 (en) * | 2012-01-12 | 2013-07-18 | 日立マクセル株式会社 | Ultrasonic welding tip, ultrasonic welding machine, and method for producing battery |
| CN206373483U (en) * | 2016-12-30 | 2017-08-04 | 苏州大时代能源科技有限公司 | A kind of lithium battery pole ear welder |
| CN106945292A (en) * | 2017-03-31 | 2017-07-14 | 安徽鹭江电子工业制造有限公司 | A kind of ultrasonic welding machine |
| CN110335984A (en) * | 2019-06-28 | 2019-10-15 | 宁德新能源科技有限公司 | A kind of dichotomous tab, electrode assembly and battery |
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