CN112719677A - Battery current collector preparation device and preparation method - Google Patents
Battery current collector preparation device and preparation method Download PDFInfo
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- CN112719677A CN112719677A CN202011620878.7A CN202011620878A CN112719677A CN 112719677 A CN112719677 A CN 112719677A CN 202011620878 A CN202011620878 A CN 202011620878A CN 112719677 A CN112719677 A CN 112719677A
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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
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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
- B23K37/0443—Jigs
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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
Abstract
The invention relates to a battery current collector preparation device and a battery current collector preparation method, and belongs to the technical field of alkaline battery production. The positioning structures of the negative electrode bottom and the copper needle are positioned by adopting a semicircular structure, and the positioning mechanism of the semicircular structure is matched with the negative electrode bottom and the copper needle limiting disc to ensure that the negative electrode bottom and the copper needle are not deviated during welding. In addition, before welding the negative electrode bottom and the copper needle, conductive lubricating oil is sprayed on the conductive round copper block, so that abrasion between the conductive round copper block and a welding head is reduced, contact resistance is reduced, welding strength is improved, the problem that electric sparks are easy to generate during welding is solved, and generation of welding copper slag is avoided.
Description
Technical Field
The invention relates to a battery current collector preparation device and a battery current collector preparation method, and belongs to the technical field of alkaline battery production.
Background
The current collector of the battery is a key component of the battery, and the current collector has two main functions, namely collecting current generated by active substances of the battery so as to form larger current for outputting to the outside, and sealing the battery, wherein the eccentricity and welding strength of the current collector of the battery directly influence the sealing effect of the battery and the long-term storage performance of the battery.
Although the current collector accounts for a small percentage of the total cost of the battery, the current collector plays a role in the battery, the welding concentricity of the current collector seriously affects the sealing effect of the battery, a large amount of copper slag generated during welding and the copper slag are easy to be brought into the battery, and the copper impurity brought into the battery is fatal damage to the battery. Therefore, how to improve the welding concentricity of the current collector and solve the generation of copper slag during welding are two major technical problems in battery production.
Disclosure of Invention
The first technical problem to be solved by the invention is as follows: provided is a battery current collector preparation apparatus.
The technical scheme adopted by the invention for solving the technical problems is as follows: the battery current collector preparation device comprises a negative electrode bottom conveying device, a copper needle conveying device, a synchronous transmission mechanism, a current collector welding device and a control system; the negative electrode bottom conveying device, the copper needle conveying device, the synchronous transmission mechanism and the current collector welding device are electrically connected with the control system;
the cathode bottom transmission device comprises a first mounting fixed table, a cathode bottom storage container, a cathode bottom vibration sorting device, a cathode bottom sorting transmission rail and a cathode bottom transmission thumb wheel; the cathode bottom storage container and the cathode bottom vibration sorting device are fixedly arranged on the first mounting and fixing table, the discharge end of the cathode bottom storage container is connected with the feed inlet of the cathode bottom vibration sorting device, the discharge outlet of the cathode bottom vibration sorting device is connected with the feed end of the cathode bottom sorting and conveying track, the cathode bottom conveying shifting wheel is arranged at the discharge end of the cathode bottom sorting and conveying track, and the outer edge of the cathode bottom conveying shifting wheel is provided with a material guide mechanism;
the copper needle conveying device comprises a second mounting and fixing table, a copper needle storage container, a copper needle vibration sorting device, a copper needle sorting and conveying track and a copper needle conveying shifting wheel, wherein the copper needle storage container and the copper needle vibration sorting device are fixedly mounted on the second mounting and fixing table;
the current collector welding device comprises: the device comprises a negative electrode bottom positioning welding guide rod, a negative electrode bottom positioning block, a negative electrode bottom welding electrode, a copper needle positioning clamp, a copper needle welding guide rail, a copper needle welding electrode, a negative electrode bottom and copper needle limiting disc, a rotating table, an equipment rack and a synchronous belt device, wherein the rotating table is rotatably arranged on the equipment rack, the axis of the rotating table is vertically arranged, a plurality of material positioning mechanisms are sequentially arranged on the rotating table along the peripheral direction of the rotating table, each material positioning mechanism comprises a copper needle welding guide rail fixedly arranged on the rotating table, the copper needle positioning clamp is fixedly arranged at the lower end of the copper needle welding guide rail, the negative electrode bottom positioning block is in sliding connection with the copper needle welding guide rail, so that the negative electrode bottom positioning block can move up and down, the negative electrode bottom positioning block is arranged right above the copper needle positioning clamp, and the lower end of the; a negative electrode bottom storage station is arranged on the negative electrode bottom positioning block and is composed of a semicircular open slot and a bottom support bulge, a copper needle storage station is arranged on the copper needle positioning clamp, the copper needle positioning clamp is composed of a semicircular clamp opening and a bottom support, and the negative electrode bottom storage station and the copper needle storage station are arranged coaxially; the negative electrode bottom welding electrode is fixedly arranged at the upper end of the copper needle positioning clamp, when the negative electrode bottom moves down along with the negative electrode bottom positioning block, the negative electrode bottom can be contacted with the negative electrode bottom welding electrode, each material positioning mechanism is provided with a negative electrode bottom positioning welding guide rod, the axis of the negative electrode bottom positioning welding guide rod is vertically arranged, the negative electrode bottom positioning welding guide rod is provided with a driving mechanism for driving the negative electrode bottom positioning welding guide rod to vertically lift, and the negative electrode bottom positioning welding guide rod is arranged right above the negative electrode bottom storage station and used for pressing the negative electrode bottom and driving the negative electrode bottom and the negative electrode bottom positioning block to move down;
the negative electrode bottom and the copper needle limiting disc are arranged at the side of the rotating table, the negative electrode bottom and the copper needle limiting disc are arranged on the equipment frame in a rotating mode, the axis of the negative electrode bottom and the copper needle limiting disc is vertically arranged, a plurality of groups of limiting bulges are arranged at intervals in the peripheral direction of the negative electrode bottom and the copper needle limiting disc, each group of limiting bulges comprises a negative electrode bottom limiting bulge and a copper needle limiting bulge, the negative electrode bottom limiting bulge and the copper needle limiting disc are combined with a negative electrode bottom storage station to form a negative electrode bottom positioning structure at the position where the negative electrode bottom and the copper needle limiting disc are in butt joint with the rotating table, the copper needle limiting bulge and the copper needle storage station are combined to form a copper needle positioning structure,
when the rotating table is in a static state, one of the material positioning mechanisms is selected as a negative electrode bottom feeding station, one of the material positioning mechanisms is selected as a copper needle feeding station, one of the material positioning mechanisms is selected as a welding station, the position where the negative electrode bottom and the copper needle limiting disc are butted with the rotating table is set as a correction station, the negative electrode bottom feeding station and the copper needle feeding station are both arranged on the upstream side of the material conveying of the correction station along the material conveying direction of the rotating table, and the welding station is arranged at the tail end of the negative electrode bottom and the material conveying direction of the copper needle limiting disc; the synchronous belt device is arranged outside the material transmission area of the rotating table and is arranged in an arc shape along the material transmission direction, and comprises a negative electrode bottom conveying section arranged between a negative electrode bottom feeding station and a correction station and a copper needle conveying section arranged between a copper needle feeding station and the correction station; the negative electrode bottom feeding station is connected with the discharge end of the negative electrode bottom conveying shifting wheel, and the copper needle feeding station is connected with the discharge end of the copper needle conveying shifting wheel.
The copper needle welding electrode is arranged on the equipment frame, is arranged right below the welding station and is provided with a driving mechanism for driving the copper needle welding electrode to lift along the vertical direction, and can be contacted with the lower end of the copper needle welding guide rail when the copper needle welding electrode moves upwards;
the synchronous transmission mechanism comprises a negative electrode bottom synchronous transmission wheel, a copper needle synchronous transmission wheel, a current collector welding main transmission wheel and a negative electrode bottom and copper needle limiting disc synchronous transmission wheel, wherein the negative electrode bottom synchronous transmission wheel is used for driving a synchronous belt device of a negative electrode bottom conveying section, the copper needle synchronous transmission wheel is used for driving a synchronous belt device of the copper needle conveying section, the current collector welding main transmission wheel is used for driving a rotating table of a current collector welding device, and the negative electrode bottom and copper needle limiting disc synchronous transmission wheel is used for driving the negative electrode bottom and the copper needle limiting disc.
The driving mechanism of the cathode bottom positioning welding guide rod comprises a driving cam, the driving cam is fixedly arranged on the equipment frame and is arranged right above the rotating table, the driving cam and the rotating table are coaxially arranged, an annular sliding groove is formed in the outer peripheral surface of the driving cam, and the cathode bottom positioning welding guide rod is connected with the rotating table in a sliding mode and is provided with a return spring in a matched mode; the upper end of the cathode bottom fixed-position welding guide rod is provided with a roller which is arranged in a hanging mode, the axis of the roller is transversely arranged, the roller is installed in an annular sliding groove in the periphery of the driving cam, and the central line of the annular sliding groove is set to be a curve according to the lifting stroke of the cathode bottom fixed-position welding guide rod.
Further, copper needle welding electrode includes electrically conductive round copper billet, and electrically conductive round copper billet is realized going up and down by the screw slider sliding pair, and the last displacement stroke stopper on electrically conductive round copper billet has been set to electrically conductive round copper billet's the end of the stroke that moves up.
Furthermore, the conductive round copper block is provided with a current collector welding conductive lubricating oil spraying device, the current collector welding conductive lubricating oil spraying device comprises a conductive lubricating oil storage container, a conductive lubricating oil conveying pipeline, a conductive lubricating oil counting controller and a metering spray gun, the conductive lubricating oil storage container is connected with the metering spray gun through the conductive lubricating oil conveying pipeline, and the conductive lubricating oil counting controller is arranged in the control system and used for controlling the spraying amount of the metering spray gun.
On the basis of the battery current collector preparation device, the invention also provides a battery current collector preparation method, which comprises the following steps:
step 1, a negative electrode bottom conveying process:
placing the negative electrode bottom in a negative electrode bottom storage container, enabling the negative electrode bottom in the negative electrode bottom storage container to flow into a negative electrode bottom vibration sorting device, performing vibration sorting on the negative electrode bottom in the negative electrode bottom vibration sorting device, enabling the sorted negative electrode bottom to flow into a negative electrode bottom sorting transmission rail, and transmitting the negative electrode bottom to a negative electrode bottom transmission shifting wheel through the negative electrode bottom sorting transmission rail;
step 2, conveying the copper needle:
placing the copper needles in a copper needle storage container, enabling the copper needles in the copper needle storage container to flow into a copper needle vibration sorting device, carrying out vibration sorting on the copper needles in the copper needle vibration sorting device, enabling the sorted copper needles to enter a copper needle sorting transmission track, and transmitting the copper needles to a copper needle transmission shifting wheel through the copper needle sorting transmission track;
step 3, current collector welding process:
the negative electrode bottom transmission shifting wheel transmits the negative electrode bottom to a negative electrode bottom feeding station, the negative electrode bottom is transferred to a negative electrode bottom positioning welding guide rod under the guiding action of a synchronous belt device, the negative electrode bottom positioning welding guide rod moves downwards under the action of a driving mechanism of the negative electrode bottom positioning welding guide rod, the negative electrode bottom is pressed at a negative electrode bottom positioning block, and the negative electrode bottom positioning block is connected with a negative electrode welding electrode; meanwhile, the copper needle transmission dial wheel transmits the copper needle to a copper needle feeding station, and the copper needle is transmitted to a copper needle positioning clamp under the guiding action of a synchronous belt device;
the negative electrode bottom positioning block is loaded with a negative electrode bottom, the copper needle positioning clamp is loaded with a copper needle, the negative electrode bottom and the copper needle limiting device limit the position of the negative electrode bottom on the negative electrode bottom positioning block and the copper needle on the copper needle positioning clamp along with the transfer of the rotating table to the negative electrode bottom and the copper needle limiting disc under the driving action force of the current collector welding main driving wheel, and after the position is limited, the current collector welding main driving wheel and the negative electrode bottom and copper needle limiting device are synchronously driven by the driving wheel to transmit the negative electrode bottom and the copper needle to a welding station; at the moment, the copper needle welding electrode moves upwards, the copper needle welding guide rail is contacted with the conductive end of the copper needle welding electrode, and meanwhile, the negative bottom positioning welding guide rod connected with the negative bottom welding electrode moves to the lower limit position, so that the negative bottom is tightly combined with the copper needle, the electrode is connected, and the current collector welding is completed.
In the preferred technical scheme of the current collector welding conductive lubricating oil spraying device, before the negative electrode bottom and the copper needle are conveyed to the welding station, the conductive round copper block is positioned at the lower end of the stroke, the current collector welding conductive lubricating oil spraying device sprays conductive lubricating oil on the surface of the conductive round copper block of the copper needle welding electrode under the control of the control system, the amount of the conductive lubricating oil sprayed on the surface of the conductive round copper block is set through the metering spray gun, the spraying time of the conductive lubricating oil is set and controlled through a control program preset by the control system, and after the spraying of the conductive lubricating oil is finished, the negative electrode bottom and the copper needle are conveyed to the welding station. The subsequent welding process is the same as the previously described solution.
The invention has the beneficial effects that: the locating structure of the negative pole bottom and the copper needle is located by adopting a semicircular structure, the locating mechanism of the semicircular structure is matched with the negative pole bottom and the copper needle limiting disc again, so that the negative pole bottom and the copper needle are ensured not to have offset during welding, meanwhile, the locating structure of the negative pole bottom and the copper needle has the same vertical central axis, the locating structure is located by the same group of material locating mechanisms, and the concentricity of the negative pole bottom and the copper needle during welding is further ensured. In addition, before welding the negative electrode bottom and the copper needle, conductive lubricating oil is sprayed on the conductive round copper block, so that abrasion between the conductive round copper block and a welding head is reduced, contact resistance is reduced, welding strength is improved, the problem that electric sparks are easy to generate during welding is solved, and generation of welding copper slag is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of a negative bottom conveying device;
FIG. 3 is a schematic structural diagram of a copper needle conveying device;
fig. 4 is a schematic structural view of a current collector welding apparatus;
FIG. 5 is a partially enlarged schematic view of the material positioning mechanism at the periphery of the turntable;
fig. 6 is a schematic structural diagram of the current collector welding conductive lubricating oil spraying device.
Parts, positions and numbers in the drawings: the device comprises a negative electrode bottom conveying device 1, a copper needle conveying device 2, a current collector welding conductive lubricating oil spraying device 4, a current collector welding device 5 and a control system 6;
the device comprises a first mounting fixed table 11, a cathode bottom storage container 12, a cathode bottom vibration sorting device 13, a cathode bottom sorting and conveying track 14 and a cathode bottom conveying thumb wheel 15;
a second mounting and fixing table 21, a copper needle storage container 22, a copper needle vibration sorting device 23, a copper needle sorting and conveying track 24 and a copper needle conveying dial wheel 25;
a negative electrode bottom synchronous driving wheel 31, a copper needle synchronous driving wheel 32, a current collector welding main driving wheel 33 and a negative electrode bottom and copper needle limiting disc synchronous driving wheel 34;
a conductive lubricating oil storage container 41, a conductive lubricating oil delivery pipe 42 and a metering spray gun 43;
a negative electrode bottom positioning welding guide rod 51, a driving cam 52, a negative electrode bottom positioning block 53, a negative electrode bottom welding electrode 54, a copper needle positioning clamp 55, a copper needle welding guide rail 56, a copper needle welding electrode 57, a negative electrode bottom and copper needle limiting disc 58 and a rotating table 59;
a conductive round copper block 571; a travel limit block 572 on the conductive round copper block.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to 6, the battery current collector preparation apparatus of the present invention includes a negative electrode bottom conveying apparatus 1, a copper needle conveying apparatus 2, a synchronous transmission mechanism, a current collector welding apparatus 5 and a control system 6; the negative electrode bottom conveying device 1, the copper needle conveying device 2, the synchronous transmission mechanism and the current collector welding device 5 are electrically connected with a control system 6;
the cathode bottom conveying device 1 comprises a first mounting fixed table 11, a cathode bottom storage container 12, a cathode bottom vibration sorting device 13, a cathode bottom sorting conveying track 14 and a cathode bottom conveying thumb wheel 15; the cathode bottom storage container 12 and the cathode bottom vibration sorting device 13 are fixedly arranged on the first mounting and fixing table 11, the discharge end of the cathode bottom storage container 12 is connected with the feed inlet of the cathode bottom vibration sorting device 13, the discharge outlet of the cathode bottom vibration sorting device 13 is connected with the feed end of the cathode bottom sorting and conveying track 14, the cathode bottom conveying thumb wheel 15 is arranged at the discharge end of the cathode bottom sorting and conveying track 14, and the outer edge of the cathode bottom conveying thumb wheel 15 is provided with a material guide mechanism;
the copper needle conveying device 2 comprises a second mounting and fixing table 21, a copper needle storage container 22, a copper needle vibration sorting device 23, a copper needle sorting and conveying track 24 and a copper needle conveying shifting wheel 25, wherein the copper needle storage container 22 and the copper needle vibration sorting device 23 are fixedly mounted on the second mounting and fixing table 21, the discharge end of the copper needle storage container 22 is connected with the feed inlet of the copper needle vibration sorting device 23, the discharge outlet of the copper needle vibration sorting device 23 is connected with the feed end of the copper needle sorting and conveying track 24, the copper needle conveying shifting wheel 25 is arranged at the discharge end of the copper needle sorting and conveying track 24, and the outer edge of the copper needle conveying shifting wheel 25 is provided with a material guide mechanism;
the current collector welding apparatus 5 includes: a negative electrode bottom positioning welding guide rod 51, a negative electrode bottom positioning block 53, a negative electrode bottom welding electrode 54, a copper needle positioning clamp 55, a copper needle welding guide rail 56, a copper needle welding electrode 57, a negative electrode bottom and copper needle limiting disc 58, a rotating platform 59, an equipment frame and a synchronous belt device, wherein the rotating platform 59 is rotatably arranged on the equipment frame, the axis of the rotating platform 59 is vertically arranged, a plurality of material positioning mechanisms are sequentially arranged on the rotating platform 59 along the peripheral direction thereof, each material positioning mechanism comprises a copper needle welding guide rail 56 fixedly arranged on the rotating platform 59, a copper needle positioning clamp 55 is fixedly arranged at the lower end of the copper needle welding guide rail 56, a negative electrode bottom positioning block 53 is connected with the copper needle welding guide rail 56 in a sliding manner, so that the negative electrode bottom positioning block 53 can move up and down, the negative electrode bottom positioning block 53 is arranged right above the copper needle positioning clamp 55, and the lower end of the negative electrode bottom positioning block 53 is supported by a return spring; a negative electrode bottom storage station is arranged on the negative electrode bottom positioning block 53, the negative electrode bottom storage station is composed of a semicircular open slot and a bottom support bulge, a copper needle storage station is arranged on the copper needle positioning clamp 55, the copper needle positioning clamp 55 is composed of a semicircular clamp opening and a bottom support, and the negative electrode bottom storage station and the copper needle storage station are arranged coaxially; the negative electrode bottom welding electrode 54 is fixedly arranged at the upper end of the copper needle positioning clamp 55, when the negative electrode bottom moves down along with the negative electrode bottom positioning block 53, the negative electrode bottom can be contacted with the negative electrode bottom welding electrode 54, each material positioning mechanism is provided with a negative electrode bottom positioning welding guide rod 51, the axis of the negative electrode bottom positioning welding guide rod 51 is vertically arranged, the negative electrode bottom positioning welding guide rod 51 is provided with a driving mechanism for driving the negative electrode bottom positioning welding guide rod 51 to vertically lift, and the negative electrode bottom positioning welding guide rod 51 is arranged right above the negative electrode bottom storage station and used for pressing the negative electrode bottom and driving the negative electrode bottom and the negative electrode bottom positioning block 53 to move down;
the negative electrode bottom and the copper needle limiting disc 58 are arranged at the side of the rotating table 59, the negative electrode bottom and the copper needle limiting disc 58 are arranged on the equipment rack in a rotating mode, the axis of the negative electrode bottom and the copper needle limiting disc 58 is vertically arranged, a plurality of groups of limiting bulges are arranged at intervals in the peripheral direction of the negative electrode bottom and the copper needle limiting disc 58, each group of limiting bulges comprises a negative electrode bottom limiting bulge and a copper needle limiting bulge, the negative electrode bottom limiting bulge and the copper needle limiting disc 58 are combined to form a negative electrode bottom positioning structure at the position where the negative electrode bottom and the copper needle limiting disc 58 are in butt joint with the rotating table 59, the copper needle positioning structure is formed by combining the copper needle limiting bulge and the copper needle storage station, and the negative electrode bottom limiting bulge and the copper needle limiting bulge can be made of ceramic materials;
when the rotating table 59 is in a static state, one of the material positioning mechanisms is selected as a negative electrode bottom feeding station, one of the material positioning mechanisms is selected as a copper needle feeding station, one of the material positioning mechanisms is selected as a welding station, the position where the negative electrode bottom and the copper needle limiting disc 58 are butted with the rotating table 59 is set as a correction station, the negative electrode bottom feeding station and the copper needle feeding station are both arranged on the upstream side of the material conveying of the correction station along the material conveying direction of the rotating table 59, and the welding station is arranged at the tail end of the negative electrode bottom and the material conveying direction of the copper needle limiting disc 58; the synchronous belt device is arranged outside the material transmission area of the rotating table and is arranged in an arc shape along the material transmission direction, and comprises a negative electrode bottom conveying section arranged between a negative electrode bottom feeding station and a correction station and a copper needle conveying section arranged between a copper needle feeding station and the correction station; the negative electrode bottom feeding station is connected with the discharging end of the negative electrode bottom conveying thumb wheel 15, the copper needle feeding station is connected with the discharging end of the copper needle conveying thumb wheel 25,
the copper needle welding electrode 57 is installed on the equipment rack, the copper needle welding electrode 57 is arranged right below the welding station, the copper needle welding electrode 57 is provided with a driving mechanism for driving the copper needle welding electrode 57 to lift along the vertical direction, and when the copper needle welding electrode 57 moves upwards, the copper needle welding electrode 57 can be in contact with the lower end of the copper needle welding guide rail 56;
the synchronous transmission mechanism comprises a negative bottom synchronous transmission wheel 31, a copper needle synchronous transmission wheel 32, a current collector welding main transmission wheel 33 and a negative bottom and copper needle limiting disc synchronous transmission wheel 34, wherein the negative bottom synchronous transmission wheel 31 is used for driving a synchronous belt device of a negative bottom conveying section, the copper needle synchronous transmission wheel 32 is used for driving a synchronous belt device of a copper needle conveying section, the current collector welding main transmission wheel 33 is used for driving a rotating table 59 of the current collector welding device 5, and the negative bottom and copper needle limiting disc synchronous transmission wheel 34 is used for driving a negative bottom and a copper needle limiting disc 58.
The cathode bottom tack-welding guide rod 51 can be formed by independently arranging a driving mechanism for each guide rod, so that the structure is simple and reliable, the driving mechanism for the cathode bottom tack-welding guide rod 51 comprises a driving cam 52, the driving cam 52 is fixedly arranged on an equipment frame and is arranged right above a rotating table 59, the driving cam 52 and the rotating table 59 are coaxially arranged, an annular sliding groove is formed in the outer peripheral surface of the driving cam 52, and the cathode bottom tack-welding guide rod 51 is connected with the rotating table 59 in a sliding mode and is provided with a return spring in a matched mode; the upper end of the cathode bottom fixed-position welding guide rod 51 is provided with a roller which is arranged in a hanging mode, the axis of the roller is transversely arranged, the roller is installed in an annular sliding groove in the periphery of the driving cam 52, and the central line of the annular sliding groove is set to be a curve according to the lifting stroke of the cathode bottom fixed-position welding guide rod 51. The stroke control of all the cathode bottom positioning welding guide rods 51 is realized by the same driving cam 52. The control principle is that the driving cam 52 is fixed, the cathode bottom positioning welding guide rod 51 is driven by the rotating table 59 to run in an annular chute which is arranged in a curve by a roller, the top wall contour line of the annular chute is used as a cam datum line, when the position corresponds to the high point position of the cam datum line, the cathode bottom positioning welding guide rod 51 moves upwards under the action of a reset spring, and when the position corresponds to the low point position of the cam datum line, the top wall of the annular chute applies downward pressure to the roller to drive the cathode bottom positioning welding guide rod 51 to press downwards.
For simple and reliable structure, the preferred structure of the copper needle welding electrode 57 is: the device comprises a conductive round copper block 571, wherein the conductive round copper block 571 is lifted by a screw rod sliding block moving pair, and the tail end of the upward moving stroke of the conductive round copper block 571 is provided with a conductive round copper block upper moving stroke limiting block 572. In addition, the conductive round copper block 571 is equipped with a current collector welding conductive lubricating oil spraying device 4, the current collector welding conductive lubricating oil spraying device 4 comprises a conductive lubricating oil storage container 41, a conductive lubricating oil delivery pipe 42, a conductive lubricating oil counting controller and a metering spray gun 43, the conductive lubricating oil storage container 41 is connected with the metering spray gun 43 through the conductive lubricating oil delivery pipe 42, and the conductive lubricating oil counting controller is arranged in the control system 6 and used for controlling the spraying amount of the metering spray gun 43. Before welding the bottom of the negative electrode and the copper needle, conductive lubricating oil is sprayed on the conductive round copper blocks 571, so that abrasion between the conductive round copper blocks 571 and a welding head is reduced, contact resistance is reduced, welding strength is improved, the problem that electric sparks are easy to generate during welding is solved, and generation of welding copper slag is avoided.
On the basis of the battery current collector preparation device, the invention also provides a battery current collector preparation method, which comprises the following steps:
step 1, a negative electrode bottom conveying process:
placing the negative electrode bottom in a negative electrode bottom storage container 12, enabling the negative electrode bottom in the negative electrode bottom storage container 12 to flow into a negative electrode bottom vibration sorting device 13, performing vibration sorting on the negative electrode bottom in the negative electrode bottom vibration sorting device 13, enabling the sorted negative electrode bottom to enter a negative electrode bottom sorting transmission rail 14, and transmitting the negative electrode bottom to a negative electrode bottom transmission thumb wheel 15 through the negative electrode bottom sorting transmission rail 14;
step 2, conveying the copper needle:
placing the copper needles in a copper needle storage container 22, enabling the copper needles in the copper needle storage container 22 to flow into a copper needle vibration sorting device 23, carrying out vibration sorting on the copper needles in the copper needle vibration sorting device 23, enabling the sorted copper needles to enter a copper needle sorting transmission track 24, and transmitting the copper needles to a copper needle transmission dial wheel 25 through the copper needle sorting transmission track 24;
step 3, current collector welding process:
the negative electrode bottom transmission thumb wheel 15 transmits the negative electrode bottom to a negative electrode bottom feeding station, the negative electrode bottom is transferred to a negative electrode bottom positioning welding guide rod 51 under the guiding action of a synchronous belt device, the negative electrode bottom positioning welding guide rod 51 moves downwards under the action of a driving mechanism of the negative electrode bottom positioning welding guide rod, the negative electrode bottom is pressed at a negative electrode bottom positioning block 53, and the negative electrode bottom positioning block 53 is connected with a negative electrode welding electrode 54; meanwhile, the copper needle transmission dial wheel 25 transmits the copper needle to a copper needle feeding station, and the copper needle is transmitted to a copper needle positioning clamp 55 under the guiding action of a synchronous belt device;
a negative electrode bottom positioning block 53 bearing a negative electrode bottom and a copper needle positioning clamp 55 bearing a copper needle are transported to the negative electrode bottom and the copper needle limiting disc 58 along with a rotating table under the driving action force of a current collector welding main driving wheel 33, the negative electrode bottom and copper needle limiting device 58 limits the negative electrode bottom on the negative electrode bottom positioning block 53 and the copper needle on the copper needle positioning clamp 55, and after the position is limited, the current collector welding main driving wheel 33 and the negative electrode bottom and copper needle limiting device synchronous driving wheel 34 convey the negative electrode bottom and the copper needle to a welding station; at the moment, the copper needle welding electrode 57 moves upwards, the copper needle welding guide rail 56 is contacted with the conductive end of the copper needle welding electrode 57, and meanwhile, the negative bottom positioning welding guide rod 51 connected with the negative bottom welding electrode 54 moves to the lower limit position, so that the negative bottom is tightly combined with the copper needle and the electrode is connected, and the current collector welding is completed.
In the preferred technical scheme of the current collector welding conductive lubricant spraying device 4, before the negative electrode bottom and the copper needle are conveyed to the welding station, the conductive round copper block 571 is at the position of the lower end of the stroke, the current collector welding conductive lubricant spraying device 4 sprays conductive lubricant on the surface of the conductive round copper block 571 of the copper needle welding electrode 57 under the control of the control system 6, the amount of the conductive lubricant sprayed on the surface of the conductive round copper block 571 is set by the metering spray gun 43, the time for spraying the conductive lubricant is set and controlled by the conductive lubricant timing controller 43 through a control program preset by the control system 6, and after the conductive lubricant is sprayed, the negative electrode bottom and the copper needle are conveyed to the welding station. The subsequent welding process is the same as the previously described solution. After welding is finished, discharging can be carried out in a mode of stirring the fluted disc, and a visual detection system can also be added for quality detection after welding, which is irrelevant to the technical problem to be solved by the invention and is not repeated in detail.
After the implementation of the invention, the production conditions are shown in the following table. The traditional current collector welding technology refers to: the copper needle and the negative terminal are positioned in circular holes which are 30 wires larger than the outer diameter of the copper needle and the negative terminal, and the copper needle and the negative terminal are deviated in the positioning holes, so that the concentricity is poor, electric sparks are generated in the welding process, and more copper slag is generated.
Claims (6)
1. The battery current collector preparation device is characterized by comprising a negative electrode bottom conveying device (1), a copper needle conveying device (2), a synchronous transmission mechanism, a current collector welding device (5) and a control system (6); the negative electrode bottom conveying device (1), the copper needle conveying device (2), the synchronous transmission mechanism and the current collector welding device (5) are electrically connected with the control system (6);
the negative pole bottom conveying device (1) comprises a first mounting fixed table (11), a negative pole bottom storage container (12), a negative pole bottom vibration sorting device (13), a negative pole bottom sorting conveying track (14) and a negative pole bottom conveying thumb wheel (15); the negative pole bottom storage container (12) and the negative pole bottom vibration sorting device (13) are fixedly arranged on the first mounting and fixing table (11), the discharge end of the negative pole bottom storage container (12) is connected with the feed inlet of the negative pole bottom vibration sorting device (13), the discharge outlet of the negative pole bottom vibration sorting device (13) is connected with the feed end of the negative pole bottom sorting and conveying track (14), the negative pole bottom conveying shifting wheel (15) is arranged at the discharge end of the negative pole bottom sorting and conveying track (14), and the outer edge of the negative pole bottom conveying shifting wheel (15) is provided with a material guide mechanism;
the copper needle conveying device (2) comprises a second mounting and fixing table (21), a copper needle storage container (22), a copper needle vibration sorting device (23), a copper needle sorting and conveying track (24) and a copper needle conveying shifting wheel (25), wherein the copper needle storage container (22) and the copper needle vibration sorting device (23) are fixedly mounted on the second mounting and fixing table (21), the discharge end of the copper needle storage container (22) is connected with the feed inlet of the copper needle vibration sorting device (23), the discharge outlet of the copper needle vibration sorting device (23) is connected with the feed end of the copper needle sorting and conveying track (24), the copper needle conveying shifting wheel (25) is arranged at the discharge end of the copper needle sorting and conveying track (24), and a material guide mechanism is arranged on the outer edge of the copper needle conveying shifting wheel (25);
the current collector welding device (5) comprises: a negative electrode bottom positioning welding guide rod (51), a negative electrode bottom positioning block (53), a negative electrode bottom welding electrode (54), a copper needle positioning clamp (55), a copper needle welding guide rail (56), a copper needle welding electrode (57), a negative electrode bottom and copper needle limiting disc (58), a rotating table (59), an equipment frame and a synchronous belt device, wherein the rotating table (59) is rotatably arranged on the equipment frame, the axis of the rotating table (59) is vertically arranged, a plurality of material positioning mechanisms are sequentially arranged on the rotating table (59) along the peripheral direction of the rotating table, each material positioning mechanism comprises a copper needle welding guide rail (56) fixedly arranged on the rotating table (59), the copper needle positioning clamp (55) is fixedly arranged at the lower end of the copper needle welding guide rail (56), the negative electrode bottom positioning block (53) is in sliding connection with the copper needle welding guide rail (56) so that the negative electrode bottom positioning block (53) can move up and down, the negative electrode bottom positioning block (53) is arranged right above the copper needle positioning clamp (55, the lower end of the negative electrode bottom positioning block (53) is supported by a return spring; a negative pole bottom storage station is arranged on the negative pole bottom positioning block (53), the negative pole bottom storage station is composed of a semicircular open slot and a bottom support bulge, a copper needle storage station is arranged on the copper needle positioning clamp (55), the copper needle positioning clamp (55) is composed of a semicircular clamp opening and a bottom support, and the negative pole bottom storage station and the copper needle storage station are coaxially arranged; the negative electrode bottom welding electrode (54) is fixedly arranged at the upper end of the copper needle positioning clamp (55), when the negative electrode bottom moves down along with the negative electrode bottom positioning block (53), the negative electrode bottom can be contacted with the negative electrode bottom welding electrode (54), each material positioning mechanism is provided with a negative electrode bottom positioning welding guide rod (51), the axis of the negative electrode bottom positioning welding guide rod (51) is vertically arranged, the negative electrode bottom positioning welding guide rod (51) is provided with a driving mechanism for driving the negative electrode bottom positioning welding guide rod to vertically lift, and the negative electrode bottom positioning welding guide rod (51) is arranged right above the negative electrode bottom storage station and used for pressing the negative electrode bottom and driving the negative electrode bottom and the negative electrode bottom positioning block (53) to move down;
the negative electrode bottom and the copper needle limiting disc (58) are arranged at the side of the rotating table (59), the negative electrode bottom and the copper needle limiting disc (58) are rotatably arranged on the equipment frame, the axial line of the negative electrode bottom and the copper needle limiting disc (58) is vertically arranged, a plurality of groups of limiting bulges are arranged at intervals in the peripheral direction of the negative electrode bottom and the copper needle limiting disc (58), each group of limiting bulges comprises a negative electrode bottom limiting bulge and a copper needle limiting bulge, the negative electrode bottom limiting bulge and a negative electrode bottom storage station are combined to form a negative electrode bottom positioning structure at the butt joint position of the negative electrode bottom and the copper needle limiting disc (58) and the rotating table (59), and the copper needle positioning structure is formed by the copper needle limiting bulge and the copper needle storage station,
when the rotating table (59) is in a static state, one of the material positioning mechanisms is selected as a negative electrode bottom feeding station, one of the material positioning mechanisms is selected as a copper needle feeding station, one of the material positioning mechanisms is selected as a welding station, the position where the negative electrode bottom and the copper needle limiting disc (58) are butted with the rotating table (59) is set as a correction station, the negative electrode bottom feeding station and the copper needle feeding station are both arranged on the upstream side of the correction station in the material conveying direction along the material conveying direction of the rotating table (59), and the welding station is arranged at the tail end of the negative electrode bottom and the copper needle limiting disc (58) in the material conveying direction; the synchronous belt device is arranged outside the material transmission area of the rotating table and is arranged in an arc shape along the material transmission direction, and comprises a negative electrode bottom conveying section arranged between a negative electrode bottom feeding station and a correction station and a copper needle conveying section arranged between a copper needle feeding station and the correction station; the negative electrode bottom feeding station is connected with the discharge end of the negative electrode bottom conveying thumb wheel (15), the copper needle feeding station is connected with the discharge end of the copper needle conveying thumb wheel (25),
the copper needle welding electrode (57) is installed on the equipment rack, the copper needle welding electrode (57) is arranged right below the welding station, the copper needle welding electrode (57) is provided with a driving mechanism for driving the copper needle welding electrode to lift along the vertical direction, and when the copper needle welding electrode (57) moves upwards, the copper needle welding electrode (57) can be in contact with the lower end of the copper needle welding guide rail (56);
the synchronous transmission mechanism comprises a negative bottom synchronous transmission wheel (31), a copper needle synchronous transmission wheel (32), a current collector welding main transmission wheel (33) and a negative bottom and copper needle limiting disc synchronous transmission wheel (34), wherein the negative bottom synchronous transmission wheel (31) is used for driving a synchronous belt device of a negative bottom conveying section, the copper needle synchronous transmission wheel (32) is used for driving a synchronous belt device of a copper needle conveying section, the current collector welding main transmission wheel (33) is used for driving a rotating table (59) of a current collector welding device (5), and the negative bottom and copper needle limiting disc synchronous transmission wheel (34) is used for driving a negative bottom and a copper needle limiting disc 58.
2. The battery current collector preparation device according to claim 1, wherein the driving mechanism of the negative bottom tack welding guide rod (51) comprises a driving cam (52), the driving cam (52) is fixedly arranged on the equipment frame and is arranged right above the rotating table (59), the driving cam (52) and the rotating table (59) are coaxially arranged, an annular sliding groove is formed in the outer peripheral surface of the driving cam (52), and the negative bottom tack welding guide rod (51) is slidably connected with the rotating table (59) and is provided with a return spring; the upper end of the cathode bottom positioning welding guide rod (51) is provided with a roller which is arranged in a hanging mode, the axis of the roller is transversely arranged, the roller is installed in an annular sliding groove in the periphery of the driving cam (52), and the center line of the annular sliding groove is set to be a curve according to the lifting stroke of the cathode bottom positioning welding guide rod (51).
3. The battery current collector preparation device according to claim 1 or 2, wherein the copper pin welding electrode (57) comprises a conductive round copper block (571), the conductive round copper block (571) is lifted by a lead screw sliding block moving pair, and an upper displacement stroke limiting block (572) of the conductive round copper block is arranged at the end of an upper movement stroke of the conductive round copper block (571).
4. The battery current collector preparation device according to claim 3, wherein the conductive round copper block (571) is provided with a current collector welding conductive lubricating oil spraying device (4), the current collector welding conductive lubricating oil spraying device (4) comprises a conductive lubricating oil storage container (41), a conductive lubricating oil conveying pipeline (42), a conductive lubricating oil counting controller and a metering spray gun (43), the conductive lubricating oil storage container (41) is connected with the metering spray gun (43) through the conductive lubricating oil conveying pipeline (42), and the conductive lubricating oil counting controller is arranged in the control system (6) and used for controlling the spraying amount of the metering spray gun (43).
5. A battery current collector manufacturing method, characterized by using the battery current collector manufacturing apparatus as claimed in claim 1 or 2, and comprising the steps of:
step 1, a negative electrode bottom conveying process:
placing the negative electrode bottom in a negative electrode bottom storage container (12), enabling the negative electrode bottom in the negative electrode bottom storage container (12) to flow into a negative electrode bottom vibration sorting device (13), performing vibration sorting on the negative electrode bottom in the negative electrode bottom vibration sorting device (13), enabling the sorted negative electrode bottom to enter a negative electrode bottom sorting transmission rail (14), and conveying the negative electrode bottom to a negative electrode bottom transmission thumb wheel 15 through the negative electrode bottom sorting transmission rail (14);
step 2, conveying the copper needle:
placing copper needles in a copper needle storage container (22), enabling the copper needles in the copper needle storage container (22) to flow into a copper needle vibration sorting device (23), carrying out vibration sorting on the copper needles in the copper needle vibration sorting device (23), enabling the sorted copper needles to enter a copper needle sorting transmission track (24), and transmitting the copper needles to a copper needle transmission dial wheel (25) through the copper needle sorting transmission track (24);
step 3, current collector welding process:
the negative electrode bottom transmission thumb wheel 15 transmits the negative electrode bottom to a negative electrode bottom feeding station, the negative electrode bottom is transferred to a negative electrode bottom positioning welding guide rod (51) under the guiding action of a synchronous belt device, the negative electrode bottom positioning welding guide rod (51) moves downwards under the action of a driving mechanism of the negative electrode bottom positioning welding guide rod, the negative electrode bottom is pressed at a negative electrode bottom positioning block (53), and the negative electrode bottom positioning block (53) is connected with a negative electrode welding electrode 54; meanwhile, the copper needle transmission dial wheel 25 transmits the copper needle to a copper needle feeding station, and the copper needle is transmitted to a copper needle positioning clamp (55) under the guiding action of a synchronous belt device;
a negative electrode bottom positioning block (53) bearing a negative electrode bottom and a copper needle positioning clamp (55) bearing a copper needle are transported to the negative electrode bottom and the copper needle limiting disc (58) along with a rotating table under the driving action force of a current collector welding main driving wheel (33), the negative electrode bottom and copper needle limiting device (58) limits the negative electrode bottom on the negative electrode bottom positioning block (53) and the copper needle on the copper needle positioning clamp (55), and after the positions are limited, the current collector welding main driving wheel (33) and the negative electrode bottom and copper needle limiting device synchronous driving wheel (34) convey the negative electrode bottom and the copper needle to a welding station; at the moment, the copper needle welding electrode (57) moves upwards, the copper needle welding guide rail (56) is contacted with the conductive end of the copper needle welding electrode (57), and meanwhile, the negative bottom positioning welding guide rod (51) connected with the negative bottom welding electrode (54) moves to a lower limit position, so that the negative bottom is tightly combined with the copper needle and the electrode is connected, and the current collector welding is completed.
6. The method of making a battery current collector of claim 5, wherein: the copper needle welding electrode (57) comprises a conductive round copper block (571), the conductive round copper block (571) is lifted by a lead screw sliding block moving pair, and the tail end of the upward moving stroke of the conductive round copper block (571) is provided with a conductive round copper block upper displacement stroke limiting block (572); the conductive round copper block (571) is provided with a current collector welding conductive lubricating oil spraying device (4), the current collector welding conductive lubricating oil spraying device (4) comprises a conductive lubricating oil storage container (41), a conductive lubricating oil conveying pipeline (42), a conductive lubricating oil counting controller and a metering spray gun (43), the conductive lubricating oil storage container (41) is connected with the metering spray gun (43) through the conductive lubricating oil conveying pipeline (42), and the conductive lubricating oil counting controller is arranged in the control system (6) and used for controlling the spraying amount of the metering spray gun (43);
before the negative electrode bottom and the copper needle are conveyed to a welding station, the conductive round copper block (571) is located at the lower end of the stroke, the current collector welding conductive lubricating oil spraying device (4) sprays conductive lubricating oil on the surface of the conductive round copper block (571) of the copper needle welding electrode (57) under the control of the control system (6), the amount of the conductive lubricating oil sprayed on the surface of the conductive round copper block (571) is set through the metering spray gun (43), the spraying time of the conductive lubricating oil is set and controlled through a control program preset by the control system (6), and after the spraying of the conductive lubricating oil is finished, the negative electrode bottom and the copper needle are conveyed to the welding station.
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