CN111482721A - Welding device and welding method for square battery tab and cover plate - Google Patents
Welding device and welding method for square battery tab and cover plate Download PDFInfo
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- CN111482721A CN111482721A CN202010264864.XA CN202010264864A CN111482721A CN 111482721 A CN111482721 A CN 111482721A CN 202010264864 A CN202010264864 A CN 202010264864A CN 111482721 A CN111482721 A CN 111482721A
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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
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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Abstract
The invention belongs to the field of a welding device of a battery lug and a cover plate, and particularly relates to a welding device and a welding method of a square battery lug and a cover plate. The invention provides a welding device and a welding method for a square battery lug and a cover plate, which do not need to turn over a battery core in the welding process, only need to turn over a tool, and can realize single-side welding of a single-bundle lug and cover plate current collecting structure or double-side welding of a double-bundle lug and battery cover plate current collecting structure according to different battery current collecting structure designs, avoid secondary damage to the battery core in the welding process and effectively improve the yield.
Description
Technical Field
The invention belongs to the field of welding devices for battery tabs and cover plates, and particularly relates to a welding device and a welding method for a square battery tab and a cover plate.
Background
The prior art and the defects are as follows:
secondary batteries are classified into three categories, cylindrical, square and flexible packages, according to their shapes. The square battery is widely applied to the field of power batteries due to the characteristics of high volume utilization rate and convenience in grouping.
In the production process of the square battery, the battery tab and the cover plate are mechanically connected by adopting a welding mode so as to realize the function of current conduction. The existing welding method for the lug and the cover plate of the square battery is mostly designed for the battery with single size, and the battery with various capacities and different size designs cannot be compatible. Once the cell size changes, the welding apparatus needs to be redesigned. The battery core is often required to be turned over in the welding process of the battery tab and the cover plate, short circuit is easily caused due to damage of the battery core, and the production yield is reduced. In addition, the on-line detection of the insulation resistance of the battery can not be realized in the battery welding process, the abnormity of the insulation resistance of the battery core can be found only after the welding device is disassembled after all welding is finished, and the reduction of the production efficiency in the battery batch production process is easily caused.
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems, the square battery tab and cover plate welding device and the welding method thereof have important practical significance for realizing single-side welding of a single-bundle tab and cover plate current collecting structure or double-side welding of a double-bundle tab and battery cover plate current collecting structure according to different battery current collecting structure designs without turning over a battery core in a welding process and only by turning over a tool, avoiding secondary damage to the battery core in the welding process and effectively improving the yield.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a welding device and a welding method for a square battery tab and cover plate, which can realize single-side welding of a single-bundle tab and cover plate current collecting structure or double-side welding of a double-bundle tab and a battery cover plate current collecting structure according to different battery current collecting structure designs by only turning over a tool without turning over a battery core in the welding process, avoid secondary damage to the battery core in the welding process and effectively improve the yield.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
the utility model provides a square battery utmost point ear and apron welding set, square battery utmost point ear and apron welding set include electric core accommodate device, and electric core utmost point ear is followed electric core accommodate device stretches out to it is fixed through electric core welding and heat dissipation support frame, the outside of electric core welding and heat dissipation support frame is equipped with lid fixed plate and lid clamp plate, lid fixed plate both ends are fixed electric core accommodate device side, install adjusting bolt on the lid fixed plate, adjusting bolt end supports the lid clamp plate, the battery apron is pushed down to the lid clamp plate, the mass flow structure of battery apron is arranged in on electric core welding and the heat dissipation support frame.
The cover pressing plate can be pushed to tightly press the battery cover plate, and the position stability of the battery cover plate in the welding process is ensured. By using the symmetrical design, the cell does not need to be turned over in the welding process, and only the tool needs to be turned over, so that the single-side welding of the single-bundle lug and the cover plate current collecting structure or the double-side welding of the double-bundle lug and the battery cover plate current collecting structure can be realized according to different battery current collecting structure designs, the secondary damage to the cell is avoided in the welding process, and the yield is effectively improved.
The invention can also adopt the following technical scheme:
in the welding device for the square battery tab and the cover plate, further, the battery cell accommodating device comprises a battery bottom plate a, a battery bottom plate B, a front fixing clamping block a, a front fixing clamping block B, a rear fixing clamping block a, a rear fixing clamping block B and a battery cell adjusting frame, the lower edges of the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block A and the rear fixing clamping block B are fixed at the four corners of the battery bottom plate A, the upper edges are fixed at the four corners of the battery bottom plate B, a cell adjusting frame is fixed between the rear fixing clamping block A and the rear fixing clamping block B, parallel positioning grooves are respectively arranged on the front fixing clamping block A and the front fixing clamping block B, a battery cover plate can be directly pushed into the positioning grooves, the battery cell adjusting frame is characterized in that internal threaded holes are formed in the rear fixing clamping block A and the rear fixing clamping block B, through holes are formed in the positions, corresponding to the internal threaded holes, of the battery cell adjusting frame, and bolts penetrate through the through holes and enter the internal threaded holes.
The front fixing clamping block A and the front fixing clamping block B are respectively provided with parallel positioning grooves, and the battery cover plate can be directly pushed into the positioning grooves to realize the fixation of the battery cover plate with the front fixing clamping block A and the front fixing clamping block B.
Internal thread holes are formed in the rear fixing clamping block A and the rear fixing clamping block B, and through holes are formed in corresponding positions on the battery cell adjusting frame. The bolt penetrates through a through hole in the battery cell adjusting frame to enter the inner threaded holes of the rear fixing clamping block A and the rear fixing clamping block B, and the battery cell adjusting frame is connected with the rear fixing clamping block A and the rear fixing clamping block B together, so that the position of the battery cell meets the welding requirement.
And the adjustment of the position of the battery core is the adjustment of the positions of the positive and negative electrode lugs of the battery core on the welding plane. Through adjusting bolt in the downthehole depth of screw thread, and then the position of adjustment electric core alignment jig, make its and electric core in close contact with, play the effect of the position of adjustment electric core, make on the electric core just, during the negative pole ear gets into the spacing groove of welding heating panel upper surface, satisfy the welding position demand.
In the welding device for the square battery tab and the cover plate, a welding protection baffle is further arranged between the battery cell accommodating device and the battery cell welding and heat dissipation support frame.
And welding protection baffles are arranged in the welding areas of the positive and negative electrode lugs, so that metal splashes are prevented from entering the battery cell in the welding process to cause short circuit of the battery cell.
In above-mentioned square battery utmost point ear and apron welding set, further, electric core welding and heat dissipation support frame include: the welding heat dissipation plate is fixed on the upper surface and the lower surface of the concave support plate and the convex support plate, a limiting groove is formed in the upper surface of the welding heat dissipation plate, a square hole type structure is arranged at one end of the concave support plate, a tenon type structure is arranged at one end of the convex support plate, and the tenon type structure can be inserted into the square hole type structure.
One end of the concave supporting plate is provided with a square hole structure, and one end of the convex supporting plate is provided with a tenon type structure and can be inserted into the square hole structure of the concave supporting plate to realize insertion. According to the requirement of the welding positions of the positive and negative electrode lugs of the battery cell, the welding station is flexibly adjusted by adjusting the depth of the convex support plate in the concave support plate.
In the welding process of the battery core lug and the cover plate, the distance between two welding stations on the flexible adjusting device can be flexibly adjusted according to the difference of the positions of the battery lugs with different sizes and by adjusting the depth of the convex support plate in the concave support plate, so that the compatibility of the welding device with batteries with various sizes is realized.
In foretell square battery utmost point ear and apron welding set, it is further, electric core welding and heat dissipation support frame still includes utmost point ear mount, the quantity of utmost point ear mount is two, marks as positive pole ear mount and negative pole ear mount, it has the through-hole to open on the welding heating panel, and the screw passes install behind the through-hole in the screwed hole of concave backup pad or convex backup pad.
The close contact of the tab and the welding area of the current collecting structure on the battery cover plate is ensured, and the tab and the current collecting structure are prevented from being welded in a faulty manner to influence the current collecting effect.
In the welding device for the lug and the cover plate of the square battery, further, two through holes are formed in the cover fixing plate and the cover pressing plate and are respectively opposite to the positive pole column and the negative pole column of the battery core, so that after the battery core is welded with the cover plate, the positive pole column and the negative pole column of the cover plate can be connected with an insulation resistance meter.
Two through holes are formed in the cover fixing plate and the cover pressing plate and are opposite to the positive pole and the negative pole of the battery cell respectively. The welded electric core does not need to be disassembled from a welding tool, two gauge pens of an insulation resistance meter (megohmmeter) can be directly contacted with the positive pole and the negative pole on the cover plate, and the welding device has an online detection function. The electric core does not need to dismantle the welding set in the welding process, can carry out insulation resistance on-line measuring to the electric core, rejects short-circuit electric core as early as possible, improves production efficiency.
The welding device for the lug and the cover plate of the square battery has the function of measuring the insulation resistance of the battery cell on line. The concave supporting plate and the convex supporting plate are made of insulating materials, after the concave supporting plate and the convex supporting plate are connected in an inserting mode, the positive electrode welding heat dissipation plate and the negative electrode welding heat dissipation plate are installed on the concave supporting plate and the convex supporting plate, gaps exist between the positive electrode welding heat dissipation plate and the negative electrode welding heat dissipation plate, and physical isolation is achieved. The design can avoid the measurement failure of the positive electrode and the negative electrode of the battery cell caused by the lap joint of the external circuit in the insulation resistance measurement process.
A welding method of a square battery tab and a cover plate uses any one of the welding devices of the square battery tab and the cover plate, and comprises the following steps:
the method comprises the following steps: respectively preparing a battery bottom plate A, a battery bottom plate B, a front fixing clamping block A, a cover fixing plate, a cover pressing plate, a front fixing clamping block B, a welding heat dissipation plate, a lug fixing frame, a battery cell adjusting frame, a rear fixing clamping block A, a rear fixing clamping block B and a welding protection baffle plate by using metal plates; preparing a concave supporting plate and a convex supporting plate by using an insulating plate;
step two: one or more battery cores with the same size are placed on a battery bottom plate A in order;
step three: the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block A and the rear fixing clamping block B are respectively connected with the battery bottom plate A, the clamping blocks are fixed with the battery cell by adjusting the positions, and then the clamping blocks are fastened with the battery bottom plate A.
Step four: inserting the concave supporting plate and the convex supporting plate together, and fastening the welding heat dissipation plate, the concave supporting plate and the convex supporting plate together through screw threads by using screws to form a positive electrode lug welding and negative electrode lug welding and heat dissipation plane; placing a bunch of tabs of the positive pole and the negative pole of the battery cell on the plane of a welding radiating plate of the battery cell welding and radiating support frame;
step five: adjusting the position of the battery cell adjusting frame, and positioning the front end of the positive electrode lug in a limiting groove on the upper surface of the welding heat dissipation plate; the negative pole tab is also processed by the method; assembling the battery cover plate on the two front fixed clamping blocks, and pressing the battery cover plate by the cover pressing plate; the cover fixing plate is connected with the front fixing clamping blocks on the two sides of the battery core through threaded connection, the position of a bolt is adjusted through internal threads on the cover fixing plate, the cover pressing plate is pushed to tightly press the battery cover plate, the battery cover plate is fixed, and the battery cover plate current collecting structure is arranged on the plane of a welding heat dissipation plate of the battery core welding and heat dissipation support frame;
step six: simultaneously placing a tab to be welded and a current collecting structure on a battery cover plate on a welding plane of a welding heat dissipation plate, wherein through holes are formed in a positive tab fixing frame and a negative tab fixing frame, and screws sequentially penetrate through the through holes in the positive tab fixing frame and the negative tab fixing frame and the through holes in the welding heat dissipation plate and are then installed in threaded holes of the concave supporting plate or the convex supporting plate;
step seven: covering a battery bottom plate B, and installing welding protection baffles in the welding areas of the positive and negative electrode lugs;
step eight: setting welding parameters, and adopting fusion welding to carry out the integrated connection of the lug and the current collecting structure on the battery cover plate;
step nine: the positive pole and the negative pole of the battery cover plate after welding are directly connected with an insulation resistance meter, and whether the welding short circuit condition exists in the battery core is measured on line;
step ten: checking whether welding spatters exist on the lug and the welding protection baffle, taking down the welding protection baffle, and removing the welding spatters on the surfaces of the lug and the welding protection baffle in a vacuum negative pressure or brush cleaning mode;
step eleven: if the positive electrode lug and the negative electrode lug of the battery cell are required to be welded in two bundles for two times, the welding device is directly turned over, the battery bottom plate A is turned over from the lower side to the upper side, a welding protection baffle is installed, and the other side is welded according to the method.
In conclusion, the invention has the following advantages and positive effects:
1. the invention can push the cover pressing plate to tightly press the battery cover plate, thereby ensuring the position stability of the battery cover plate in the welding process. By using the symmetrical design, the cell does not need to be turned over in the welding process, and only the tool needs to be turned over, so that the single-side welding of the single-bundle lug and the cover plate current collecting structure or the double-side welding of the double-bundle lug and the battery cover plate current collecting structure can be realized according to different battery current collecting structure designs, the secondary damage to the cell is avoided in the welding process, and the yield is effectively improved.
2. According to the invention, the position of the battery cell adjusting frame is adjusted through adjusting the depth of the bolt in the threaded hole, so that the battery cell adjusting frame is in close contact with the battery cell, the function of adjusting the position of the battery cell is achieved, the positive and negative lugs on the battery cell enter the limiting grooves on the upper surface of the welding heat dissipation plate, and the welding positioning requirement is met.
3. In the welding process of the battery core lug and the cover plate, the distance between two welding stations on the welding device can be flexibly adjusted by adjusting the depth of the convex support plate in the concave support plate according to the position difference of the battery lugs with different sizes, so that the compatibility of the welding device to batteries with various sizes is realized.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a single-side welding of a welding device according to an embodiment of the present invention when both positive and negative electrodes are single-bundle tab welding;
FIG. 3 is a schematic structural diagram of a two-sided welding device according to an embodiment of the present invention when both positive and negative electrodes are welded with two bundles of tabs;
FIG. 4 is a diagram showing the relationship between the welding positions of the tab and the cover plate of the square battery of the present invention;
fig. 5 is an outline view of the cell welding and heat dissipation support frame of the present invention;
fig. 6 is a cross-sectional view of the cell welding and heat dissipation support frame of the present invention.
In the figure:
in the figure: 1-battery backplane a; 2-front fixed clamp block A; 3, a battery cover plate; 4-lid securing plate; 5-cover pressing plate; 6-front fixed clamping block B;
7-cell welding and heat dissipation support frame, 701-concave support plate, 702-welding heat dissipation plate, 703-tab fixing frame, 704-convex support plate;
8, welding a protective baffle; 9-battery backplane B; 10-rear fixed clamp block A; 11-cell adjusting frame; 12-rear fixed clamp block B; 13-electric core; 14-insulation resistance meter.
Detailed Description
First, it should be noted that the following will specifically describe a prismatic battery tab and cover plate welding apparatus and a welding method thereof, and the specific structure, features and advantages thereof, etc. by way of example, however, all the descriptions are for illustrative purposes only and should not be construed as forming any limitation on the present invention. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. In contrast, when an element is said to be "directly connected" to another element, it is intended that no intervening element is present.
Fig. 1 shows a schematic structural diagram of the present invention, and fig. 2 shows a schematic structural diagram of a single-side welding device according to an embodiment of the present invention when both positive and negative electrodes are welded by a single-beam tab, and fig. 3 shows a schematic structural diagram of a double-side welding device according to an embodiment of the present invention when both positive and negative electrodes are welded by two-beam tabs, and fig. 4 shows a diagram of a relation between a square battery tab and a cover plate according to the present invention, and fig. 5 shows an outline diagram of a cell welding and heat dissipation support frame according to the present invention, and fig. 6 shows a cross-sectional view of the cell welding and heat dissipation support frame according to the present invention, and the present invention will be specifically described below with reference to fig. 1 to 6.
The utility model provides a square battery utmost point ear and apron welding set, square battery utmost point ear and apron welding set include electric core accommodate device, and electric core utmost point ear is followed electric core accommodate device stretches out to it is fixed through electric core welding and heat dissipation support frame, the outside of electric core welding and heat dissipation support frame is equipped with lid fixed plate and lid clamp plate, lid fixed plate both ends are fixed electric core accommodate device side, install adjusting bolt on the lid fixed plate, adjusting bolt end supports the lid clamp plate, the battery apron is pushed down to the lid clamp plate, the mass flow structure of battery apron is arranged in on electric core welding and the heat dissipation support frame.
The cover pressing plate can be pushed to tightly press the battery cover plate, and the position stability of the battery cover plate in the welding process is ensured. By using the symmetrical design, the cell does not need to be turned over in the welding process, and only the tool needs to be turned over, so that the single-side welding of the single-bundle lug and the cover plate current collecting structure or the double-side welding of the double-bundle lug and the battery cover plate current collecting structure can be realized according to different battery current collecting structure designs, the secondary damage to the cell is avoided in the welding process, and the yield is effectively improved.
Furthermore, the invention also provides a battery cell accommodating device, which comprises a battery soleplate A, a battery soleplate B, a front fixing clamping block A, a front fixing clamping block B, a rear fixing clamping block A, a rear fixing clamping block B and a battery cell adjusting frame, the lower edges of the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block A and the rear fixing clamping block B are fixed at the four corners of the battery bottom plate A, the upper edges are fixed at the four corners of the battery bottom plate B, a cell adjusting frame is fixed between the rear fixing clamping block A and the rear fixing clamping block B, parallel positioning grooves are respectively arranged on the front fixing clamping block A and the front fixing clamping block B, a battery cover plate can be directly pushed into the positioning grooves, the battery cell adjusting frame is characterized in that internal threaded holes are formed in the rear fixing clamping block A and the rear fixing clamping block B, through holes are formed in the positions, corresponding to the internal threaded holes, of the battery cell adjusting frame, and bolts penetrate through the through holes and enter the internal threaded holes.
The front fixing clamping block A and the front fixing clamping block B are respectively provided with parallel positioning grooves, and the battery cover plate can be directly pushed into the positioning grooves to realize the fixation of the battery cover plate with the front fixing clamping block A and the front fixing clamping block B.
Internal thread holes are formed in the rear fixing clamping block A and the rear fixing clamping block B, and through holes are formed in corresponding positions on the battery cell adjusting frame. The battery cell adjusting frame is connected with the rear fixing clamping block A and the rear fixing clamping block B together through the bolts penetrating through the through holes in the battery cell adjusting frame and entering the inner threaded holes of the rear fixing clamping block A and the rear fixing clamping block B. Through adjusting bolt in the downthehole depth of screw, and then the position of adjustment electric core alignment jig makes the electric core position satisfy the welding demand.
And the adjustment of the position of the battery core is the adjustment of the positions of the positive and negative electrode lugs of the battery core on the welding plane. Through adjusting bolt in the downthehole depth of screw thread, and then the position of adjustment electric core alignment jig, make its and electric core in close contact with, play the effect of the position of adjustment electric core, make on the electric core just, during the negative pole ear gets into the spacing groove of welding heating panel upper surface, satisfy the welding position demand.
It should be noted that a welding protection baffle is arranged between the battery cell accommodating device and the battery cell welding and heat dissipation support frame.
And welding protection baffles are arranged in the welding areas of the positive and negative electrode lugs, so that metal splashes are prevented from entering the battery cell in the welding process to cause short circuit of the battery cell.
Further, it is also considered in the present invention that the cell soldering and heat dissipating support frame includes: the welding heat dissipation plate is fixed on the upper surface and the lower surface of the concave support plate and the convex support plate, a limiting groove is formed in the upper surface of the welding heat dissipation plate, a square hole type structure is arranged at one end of the concave support plate, a tenon type structure is arranged at one end of the convex support plate, and the tenon type structure can be inserted into the square hole type structure.
One end of the concave supporting plate is provided with a square hole structure, and one end of the convex supporting plate is provided with a tenon type structure and can be inserted into the square hole structure of the concave supporting plate to realize insertion. According to the requirement of the welding positions of the positive and negative electrode lugs of the battery cell, the welding station is flexibly adjusted by adjusting the depth of the convex support plate in the concave support plate.
In the welding process of the battery core lug and the cover plate, the distance between two welding stations on the flexible adjusting device can be flexibly adjusted according to the difference of the positions of the battery lugs with different sizes and by adjusting the depth of the convex support plate in the concave support plate, so that the compatibility of the welding device with batteries with various sizes is realized.
It should be pointed out that electric core welding and heat dissipation support frame still includes utmost point ear mount, the quantity of utmost point ear mount is two, marks as anodal ear mount and negative pole ear mount, two the utmost point ear mount passes through bolted connection with concave backup pad, protruding backup pad through the through-hole on the welding heating panel respectively.
The close contact of the tab and the welding area of the current collecting structure on the battery cover plate is ensured, and the tab and the current collecting structure are prevented from being welded in a faulty manner to influence the current collecting effect.
It should be noted that, both the cover fixing plate and the cover pressing plate are provided with two through holes, and the two through holes are respectively opposite to the positive pole column and the negative pole column of the battery core, so that after the battery core is welded with the cover plate, the positive pole column and the negative pole column on the cover plate can be connected with the insulation resistance meter.
Two through holes are formed in the cover fixing plate and the cover pressing plate and are opposite to the positive pole and the negative pole of the battery cell respectively. The welding device has an online detection function. The welding frock does not need to be dismantled to the electric core that the welding was accomplished, and two pens of insulation resistance meter (megohmmeter) can be directly with the positive and negative pole post contact on the apron, can carry out insulation resistance on-line measuring to electric core, rejects short circuit electric core as early as possible, improves production efficiency.
The welding device for the lug and the cover plate of the square battery has the function of measuring the insulation resistance of the battery cell on line. The concave supporting plate and the convex supporting plate are made of insulating materials, after the concave supporting plate and the convex supporting plate are connected in an inserting mode, the positive electrode welding heat dissipation plate and the negative electrode welding heat dissipation plate are installed on the concave supporting plate and the convex supporting plate, gaps exist between the positive electrode welding heat dissipation plate and the negative electrode welding heat dissipation plate, and physical isolation is achieved. The design can avoid measurement failure caused by external circuit lap joint of the positive pole column and the negative pole column on the cover plate after welding in the insulation resistance measurement process.
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
the first embodiment is as follows:
in the first embodiment, the single-core single-bundle tab and cover plate welding device is taken as an example, and the following steps are referred to for manufacturing.
Step 1: a battery bottom plate A1, a battery bottom plate B9, a front fixing clamping block A2, a cover fixing plate 4, a cover pressing plate 5, a front fixing clamping block B6, a battery cell adjusting frame 11, a rear fixing clamping block A10 and a rear fixing clamping block B12 are respectively prepared from aluminum alloy plates. A red copper bar is adopted to prepare a welding heat dissipation plate 702 and a lug fixing 703 frame. The concave support plate 701 and the convex support plate 704 are made of bakelite. The welding protection baffle 8 is made of copper sheets.
Step 2: placing the single cell 13 on a battery baseboard A1;
and step 3: the front fixing clamp block A2, the front fixing clamp block B6, the rear fixing clamp block A10 and the rear fixing clamp block B12 are respectively connected with a battery bottom plate A1, the positions of the clamp blocks are adjusted to fix the clamp blocks with the battery cell 13, and then the clamp blocks are fastened with the battery bottom plate A1.
And 4, step 4: according to the requirement of the welding position of the positive and negative electrode tabs of the battery cell 13, the concave support plate 701 and the convex support plate 704 are inserted together, and the welding heat dissipation plate 702, the concave support plate 701 and the convex support plate 704 are fastened together by using screws to form a welding and heat dissipation plane of the positive and negative electrode tabs. The single bundle of tabs of the single cell 13 are placed on the plane of the welding heat dissipation plate 702 of the cell welding and heat dissipation support frame 7.
And 5: the position of the cell adjusting bracket 11 is adjusted, and the front end of the positive electrode tab is located in the limiting groove on the upper surface of the welding heat dissipation plate 702. The negative electrode tab is also processed in this way. The battery cover plate 3 is assembled on the front fixing clamping block A2 and the front fixing clamping block B6, and the cover pressing plate 5 presses the battery cover plate 3; lid fixed plate 4 is connected with preceding fixed clamp splice A2, B6 of electricity core both sides through threaded connection to carry out the position control of bolt through the internal thread on lid fixed plate 4, and then promote lid clamp plate 5 and make it compress tightly battery apron 3, guarantee the stability of battery apron 3 in welding process position. The current collecting structure of the battery cover plate 3 is arranged on the plane of the welding heat dissipation plate 702 of the cell welding and heat dissipation support frame 7.
Step 6: and simultaneously placing the tab to be welded and the current collecting structure on the battery cover plate 3 on the welding plane of the welding heat dissipation plate. Through holes are formed in the positive tab fixing frame and the negative tab fixing frame 703, and screws sequentially penetrate through the through holes in the positive tab fixing frame and the negative tab fixing frame 703 and the through holes in the welding heat dissipation plate and then are installed in the threaded holes of the concave support plate 701 or the convex support plate 704. The close contact of the tab and the welding area of the current collecting structure on the battery cover plate 3 is ensured, and the tab and the current collecting structure are prevented from being welded in a faulty manner to influence the current collecting effect.
And 7: covering a battery bottom plate B9, and installing a welding protection baffle 8 in the welding area of the positive and negative electrode lugs to prevent metal splashes from entering the battery cell in the welding process to cause short circuit of the battery cell;
and 8: and setting welding parameters, and performing integrated connection of the lug and the current collecting structure on the battery cover plate by adopting fusion welding.
And step 9: the welded positive and negative poles of the battery cover plate 3 can be directly connected with the insulation resistance meter 14 without disassembling the welding tool, and the on-line measurement of whether the short circuit condition exists in the battery cell 13 is carried out.
Step 10: checking whether welding spatters exist on the lug and the welding protection baffle plate 8 or not, taking down the welding protection baffle plate 8, removing the welding spatters on the surface of the lug and the welding protection baffle plate 8 in a vacuum negative pressure or hairbrush cleaning mode, and completing the welding of the lug and the cover plate.
Example two:
in the second embodiment, the multi-core multi-beam tab and battery cover plate welding device is taken as an example, and the manufacturing process is performed according to the following steps.
The remaining steps are similar to example 1, with the only difference being step 2, step 4-step 13.
Step 2: a plurality of battery cells 13 are placed on a battery baseboard A1 in order;
and 4, step 4: according to the requirement of the welding position of the positive and negative electrode tabs of the battery cell 13, the concave support plate 701 and the convex support plate 704 are inserted together, and the welding heat dissipation plate 702 is fastened with the threads on the concave support plate 701 and the convex support plate 704 by using screws, so that a positive and negative electrode tab welding and heat dissipation plane capable of welding the upper and lower surfaces simultaneously is formed. The positive and negative electrode tabs of the plurality of cells 13 are equally divided into two bundles, and the two bundles are respectively arranged on the upper and lower sides of the welding heat dissipation plate 702 of the cell welding and heat dissipation support frame 7.
And 5: the position of the cell adjusting frame 11 is adjusted, and the front end of one of the two bundles of positive electrode tabs is located in the limiting groove on the upper surface of the welding heat dissipation plate 702. One bundle of the negative electrode tabs is also processed in this way. The battery cover plate 3 is assembled on the front fixing clamping block A2 and the front fixing clamping block B6, and the cover pressing plate 5 presses the battery cover plate 3; lid fixed plate 4 is connected with preceding fixed clamp splice A2, B6 of electricity core both sides through threaded connection to carry out the position control of bolt through the internal thread on lid fixed plate 4, and then promote lid clamp plate 5 and make it compress tightly battery apron 3, guarantee the stability of battery apron 3 in welding process position. The current collecting structure of the battery cover plate 3 is arranged on the plane of the welding heat dissipation plate 702 of the cell welding and heat dissipation support frame 7.
Step 6: and simultaneously placing the tab to be welded and the current collecting structure on the battery cover plate 3 on the welding plane of the welding heat dissipation plate. Through holes are formed in the positive tab fixing frame and the negative tab fixing frame 703, and screws sequentially penetrate through the through holes in the positive tab fixing frame and the negative tab fixing frame 703 and the through holes in the welding heat dissipation plate and then are installed in the threaded holes of the concave support plate 701 or the convex support plate 704. The close contact of the tab and the welding area of the current collecting structure on the battery cover plate 3 is ensured, and the tab and the current collecting structure are prevented from being welded in a faulty manner to influence the current collecting effect.
And 7: cover battery bottom plate B9, at positive and negative pole ear welding area installation welding protection baffle 8, prevent that metal splash from getting into electric core in the welding process, causing the electric core short circuit.
And 8: setting welding parameters, and adopting laser fusion welding to integrally connect the lug and the current collecting structure on the battery cover plate 3.
And step 9: the welded positive and negative poles of the battery cover plate 3 can be directly connected with the insulation resistance meter 14 without disassembling the welding tool, and the on-line measurement of whether the short circuit condition exists in the battery cell 13 is carried out.
Step 10: checking whether welding spatters exist on the lug and the welding protective baffle plate 8 or not, taking down the welding protective baffle plate 8, and removing the welding spatters on the surfaces of the lug and the welding protective baffle plate 8 in a vacuum negative pressure or brush cleaning mode to finish the welding.
Step 11: the battery base plate A1 is placed upwards by turning over the welding device, the battery base plate A1 is divided into the other of the two bundles of positive electrode tabs, and the positive electrode current collecting structure on the battery cover plate 3 is simultaneously placed on the welding plane of the welding heat dissipation plate 702. Through holes are formed in the positive tab fixing frame and the negative tab fixing frame 703, and screws sequentially penetrate through the through holes in the positive tab fixing frame and the negative tab fixing frame 703 and the through holes in the welding heat dissipation plate and then are installed in the threaded holes of the concave support plate 701 or the convex support plate 704. The welding area of the lug and the current collecting structure on the battery cover plate 3 is ensured to be clamped tightly. And welding one of the two bundles of the negative electrode tabs by the method.
Step 12: setting welding parameters, and adopting laser fusion welding to integrally connect the lug and the current collecting structure on the battery cover plate 3.
Step 13: the welded battery cell 13 can be directly connected with the insulation resistance meter 14 without dismounting a welding tool, and whether the battery cell 13 has a short circuit condition is measured on line.
Step 14: checking whether welding spatters exist on the lug and the welding protection baffle plate 8 or not, taking down the welding protection baffle plate 8, and removing the welding spatters on the surfaces of the lug and the welding protection baffle plate 8 in a vacuum negative pressure or brush cleaning mode to finish welding.
In conclusion, the invention can provide the welding device and the welding method for the square battery lug and cover plate, which do not need to turn over the battery core in the welding process, only need to turn over the tool, and can realize single-side welding of a single-bundle lug and cover plate current collecting structure or double-side welding of a double-bundle lug and battery cover plate current collecting structure according to different battery current collecting structure designs, avoid secondary damage to the battery core in the welding process, and effectively improve the yield.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The utility model provides a square battery utmost point ear and apron welding set which characterized in that: square battery utmost point ear and apron welding set include electric core accommodate device, and electric core utmost point ear is followed electric core accommodate device stretches out to it is fixed through electric core welding and heat dissipation support frame, the outside of electric core welding and heat dissipation support frame is equipped with lid fixed plate and lid clamp plate, lid fixed plate both ends are fixed electric core accommodate device side, install adjusting bolt on the lid fixed plate, adjusting bolt end supports the lid clamp plate, the battery apron is pushed down to the lid clamp plate, the mass flow structure of battery apron is arranged in on the electric core welding and the heat dissipation support frame.
2. The prismatic battery tab and cover plate welding apparatus of claim 1, wherein: the battery cell accommodating device comprises a battery bottom plate A, a battery bottom plate B, a front fixing clamping block A, a front fixing clamping block B, a rear fixing clamping block A, a rear fixing clamping block B and a battery cell adjusting frame, wherein the lower edges of the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block A and the rear fixing clamping block B are fixed at the four corners of the battery bottom plate A, the upper edges of the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block B and the rear fixing clamping block B are fixed at the four corners of the battery bottom plate B, a battery cell adjusting frame is fixed between the rear fixing clamping block A and the rear fixing clamping block B, parallel positioning grooves are respectively arranged on the front fixing clamping block A and the front fixing clamping block B, a battery cover plate can be directly pushed into the positioning grooves, internal thread holes are formed in the rear fixing clamping block A and the rear fixing clamping block B, through holes are formed in positions.
3. The prismatic battery tab and cover plate welding apparatus of claim 1, wherein: and a welding protection baffle is arranged between the battery cell accommodating device and the battery cell welding and heat dissipation support frame.
4. The prismatic battery tab and cover plate welding apparatus of claim 1, wherein: electric core welding and heat dissipation support frame includes: the welding heat dissipation plate is fixed on the upper surface and the lower surface of the concave support plate and the convex support plate, a limiting groove is formed in the upper surface of the welding heat dissipation plate, a square hole type structure is arranged at one end of the concave support plate, a tenon type structure is arranged at one end of the convex support plate, and the tenon type structure can be inserted into the square hole type structure.
5. The prismatic battery tab and cover plate welding apparatus of claim 4, wherein: the battery core welding and heat dissipation support frame further comprises two lug fixing frames, the number of the lug fixing frames is two, the lug fixing frames are marked as positive lug fixing frames and negative lug fixing frames, through holes are formed in the welding heat dissipation plate, and screws penetrate through the through holes and are installed in threaded holes of the concave support plate or the convex support plate.
6. The prismatic battery tab and cover plate welding apparatus of claim 1, wherein: two through holes are formed in the cover fixing plate and the cover pressing plate and are opposite to the positive pole column and the negative pole column of the battery cell respectively, so that the positive pole column and the negative pole column of the cover plate can be connected with the insulation resistance meter after the battery cell is welded with the cover plate.
7. A method for welding a lug and a cover plate of a square battery is characterized by comprising the following steps: the welding method of the square battery tab and the cover plate uses the welding device of the square battery tab and the cover plate as claimed in any one of claims 1 to 6, and the welding method of the square battery tab and the cover plate comprises the following steps:
the method comprises the following steps: respectively preparing a battery bottom plate A, a battery bottom plate B, a front fixing clamping block A, a cover fixing plate, a cover pressing plate, a front fixing clamping block B, a welding heat dissipation plate, a lug fixing frame, a battery cell adjusting frame, a rear fixing clamping block A, a rear fixing clamping block B and a welding protection baffle plate by using metal plates; preparing a concave supporting plate and a convex supporting plate by using an insulating plate;
step two: one or more battery cores with the same size are placed on a battery bottom plate A in order;
step three: the front fixing clamping block A, the front fixing clamping block B, the rear fixing clamping block A and the rear fixing clamping block B are respectively connected with the battery bottom plate A, the clamping blocks are fixed with the battery cell by adjusting the positions, and then the clamping blocks are fastened with the battery bottom plate A.
Step four: inserting the concave supporting plate and the convex supporting plate together, and fastening the welding heat dissipation plate, the concave supporting plate and the convex supporting plate together through screw threads by using screws to form a positive electrode lug welding and negative electrode lug welding and heat dissipation plane; placing a bunch of tabs of the positive pole and the negative pole of the battery cell on the plane of a welding radiating plate of the battery cell welding and radiating support frame;
step five: adjusting the position of the battery cell adjusting frame, and positioning the front end of the positive electrode lug in a limiting groove on the upper surface of the welding heat dissipation plate; the negative pole tab is also processed by the method; assembling the battery cover plate on the two front fixed clamping blocks, and pressing the battery cover plate by the cover pressing plate; the cover fixing plate is connected with the front fixing clamping blocks on the two sides of the battery core through threaded connection, the position of a bolt is adjusted through internal threads on the cover fixing plate, the cover pressing plate is pushed to tightly press the battery cover plate, the battery cover plate is fixed, and the battery cover plate current collecting structure is arranged on the plane of a welding heat dissipation plate of the battery core welding and heat dissipation support frame;
step six: simultaneously placing a tab to be welded and a current collecting structure on a battery cover plate on a welding plane of a welding heat dissipation plate, wherein through holes are formed in a positive tab fixing frame and a negative tab fixing frame, and screws sequentially penetrate through the through holes in the positive tab fixing frame and the negative tab fixing frame and the through holes in the welding heat dissipation plate and are then installed in threaded holes of the concave supporting plate or the convex supporting plate;
step seven: covering a battery bottom plate B, and installing welding protection baffles in the welding areas of the positive and negative electrode lugs;
step eight: setting welding parameters, and adopting fusion welding to carry out the integrated connection of the lug and the current collecting structure on the battery cover plate;
step nine: the positive pole and the negative pole of the battery cover plate after welding are directly connected with an insulation resistance meter, and whether the welding short circuit condition exists in the battery core is measured on line;
step ten: checking whether welding spatters exist on the lug and the welding protection baffle, taking down the welding protection baffle, and removing the welding spatters on the surfaces of the lug and the welding protection baffle in a vacuum negative pressure or brush cleaning mode;
step eleven: if the positive electrode lug and the negative electrode lug of the battery cell are required to be welded in two bundles for two times, the welding device is directly turned over, the battery bottom plate A is turned over from the lower side to the upper side, a welding protection baffle is installed, and the other side is welded according to the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264864.XA CN111482721A (en) | 2020-04-07 | 2020-04-07 | Welding device and welding method for square battery tab and cover plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264864.XA CN111482721A (en) | 2020-04-07 | 2020-04-07 | Welding device and welding method for square battery tab and cover plate |
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| CN111482721A true CN111482721A (en) | 2020-08-04 |
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| CN202010264864.XA Pending CN111482721A (en) | 2020-04-07 | 2020-04-07 | Welding device and welding method for square battery tab and cover plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453699A (en) * | 2020-11-09 | 2021-03-09 | 武汉逸飞激光股份有限公司 | Full-lug current collecting disc welding equipment |
-
2020
- 2020-04-07 CN CN202010264864.XA patent/CN111482721A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453699A (en) * | 2020-11-09 | 2021-03-09 | 武汉逸飞激光股份有限公司 | Full-lug current collecting disc welding equipment |
| CN112453699B (en) * | 2020-11-09 | 2023-01-24 | 武汉逸飞激光股份有限公司 | Full-lug current collecting disc welding equipment |
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