阅读说明：本技术 一种锂电池焊接的快速定位工装结构及其焊接方法 (Rapid positioning tool structure for lithium battery welding and welding method thereof ) 是由 李桂洪 刘彦兵 黄保进 于 2021-07-16 设计创作，主要内容包括：本发明涉及一种锂电池焊接的快速定位工装结构及其焊接方法,工装结构包括工位盘,设置在工位盘上方的焊接机构,所述工位盘上设有电芯安置槽和极耳安置槽,电芯安置槽的底部设有产品顶出机构,工位盘的上方设有产品卸料机构；工位盘的外侧设有电芯输送带,电芯输送带的端部位于电芯安置槽的一侧；工位盘的上方设有极耳输送带,极耳输送带的端部位于所述极耳安置槽的一侧。该装置实现了电芯、极耳的自动上料,电芯、极耳的自动焊接以及焊接后产品的自动顶出以及卸料,而且,工位盘上设有多个焊接加工工位,可以同步实现了多组电芯、极耳的焊接加工,提高了锂电池焊接加工的效率。(The invention relates to a quick positioning tool structure for welding a lithium battery and a welding method thereof, wherein the tool structure comprises a station disc and a welding mechanism arranged above the station disc, wherein the station disc is provided with a battery cell accommodating groove and a lug accommodating groove, the bottom of the battery cell accommodating groove is provided with a product ejection mechanism, and a product unloading mechanism is arranged above the station disc; a battery cell conveyer belt is arranged on the outer side of the station disc, and the end part of the battery cell conveyer belt is positioned on one side of the battery cell accommodating groove; and a lug conveyer belt is arranged above the station disc, and the end part of the lug conveyer belt is positioned on one side of the lug containing groove. The device has realized the automatic feeding of electric core, utmost point ear, and the automatic weld of electric core, utmost point ear and the automation of welding back product are ejecting and unload, and in addition, be equipped with a plurality of welding process stations on the station dish, can realize the welding process of multiunit electric core, utmost point ear in step, improved lithium cell welding process's efficiency.)

1. A quick positioning tool structure for lithium battery welding comprises a station disc and a welding mechanism arranged above the station disc, and is characterized in that the bottom of the station disc is connected with a rotating motor, a cell containing groove and a lug containing groove are formed in the station disc, a product ejection mechanism is arranged at the bottom of the cell containing groove, and a product discharge mechanism is arranged above the station disc;

a battery cell conveying belt is arranged on the outer side of the station disc, and the end part of the battery cell conveying belt is positioned on one side of the battery cell accommodating groove;

and a lug conveyer belt is arranged above the station disc, and the end part of the lug conveyer belt is positioned on one side of the lug containing groove.

2. The lithium battery welding rapid positioning tool structure according to claim 1, wherein the welding mechanism comprises a lifting plate, a plurality of welding heads mounted at the edge of the bottom of the lifting plate, and a lifting driving cylinder connected with the back of the lifting plate, wherein the welding heads are located right above the joint of the cell placement groove and the tab placement groove.

3. The lithium battery welding rapid positioning tool structure of claim 2, wherein the product ejection mechanism comprises a product supporting plate arranged at the bottom of the battery cell accommodating groove, an installation box arranged at the bottom of the station disc, and a product ejection cylinder arranged in the installation box and connected with the product supporting plate.

4. The lithium battery welding rapid positioning tool structure as claimed in claim 3, wherein the product unloading mechanism comprises an unloading plate installed above the station plate, a plurality of suckers installed at the edge of the unloading plate, an unloading lifting cylinder connected with the back of the unloading plate, a mounting plate connected with the unloading lifting cylinder, and an orientation control motor connected with the mounting plate, wherein a suction pump is arranged on the back of the unloading plate, the suction pump is connected with the suckers through hoses, and the suckers are located above the tab accommodating grooves.

5. The lithium battery welding rapid positioning tool structure according to claim 3 or 4, wherein a first position sensor is arranged at the bottom of the battery cell accommodating groove, a second position sensor is arranged at the bottom of the tab accommodating groove, and the first position sensor and the second position sensor are connected with a control system.

6. The lithium battery welding rapid positioning tool structure according to claim 5, wherein the control system comprises:

the signal receiving module is used for receiving the component position signals transmitted by the first position sensor and the second position sensor;

the signal processing module is used for carrying out logic processing on the signals received by the signal receiving module and sending the execution signals to the action execution module;

and the action execution module is used for controlling the welding mechanism to descend and controlling the product ejection mechanism to eject the welded product.

7. The lithium battery welding rapid positioning tool structure according to claim 5, wherein the number of the battery cell accommodating grooves is multiple, the battery cell accommodating grooves are uniformly distributed in the circumferential direction of the edge of the station disc, and the number of the welding heads is consistent with the number of the battery cell accommodating grooves.

8. The lithium battery welded rapid positioning tool structure according to claim 3, wherein a phase-change material heat dissipation layer is arranged on the upper surface of the product supporting plate, and the phase-change material heat dissipation layer is polyethylene glycol with an average molecular weight of 1000.

9. The method of claim 8The utility model provides a lithium cell welded quick location frock structure, its characterized in that, the product layer board with still be provided with graphite alkene heat dissipation layer between the phase change material heat dissipation layer, just graphite alkene heat dissipation layer's thermal diffusivity is 1500mm²/s-2000mm²And the heat conduction coefficient of the graphene heat dissipation layer is 2500W/(mK) -3000W/(mK).

10. A welding method for a rapid positioning tool structure welded by adopting a lithium battery as claimed in any one of claims 1 to 9 is characterized by comprising the following steps:

s1, product feeding: the battery core conveyer belt conveys the battery core to the battery core placing groove, and the lug conveyer belt conveys the lugs to the lug placing groove;

s2, positioning, sensing and automatically welding the product: after the first position sensor senses a position signal of the battery core, the second position sensor senses a position signal of the lug, a signal receiving module of the control system feeds the signal back to a signal processing module, the signal processing module controls a lifting driving cylinder to start through an action execution module, and the lifting driving cylinder controls a lifting plate and a welding head to move downwards to weld the joint position of the battery core and the lug;

s3, ejecting the welded product: after welding is finished, the rotary motor drives the station disc to rotate to the position of the unloading tool, the control system controls the product ejection cylinder to start, and the product ejection cylinder controls the product supporting plate to eject the product;

s4, discharging the welded product: the unloading lifting cylinder of the product unloading mechanism drives the unloading plate to move downwards, the sucking discs on the unloading plate adsorb the products after welding and drive the unloading plate to rotate by a preset angle through the position control motor, the air source of the sucking discs is disconnected, and the products are placed on the conveying belt of the next station beside the station disc, so that unloading can be completed.

Technical Field

The invention relates to the field of mechanical equipment, in particular to a quick positioning tool structure for lithium battery welding and a welding method thereof.

Background

The welding of lithium battery generally refers to the fixed processing of welding between electric core and the utmost point ear, and present lithium battery processing field generally adopts the manual work to carry out welding process, and welding efficiency is low.

Therefore, automatic welding equipment appears on the market, for example, the application number is 202010958869.2, the patent name is an invention patent of a lithium battery welding device which is safe to use and high in welding efficiency, the invention patent comprises a rack, a fixed base is fixedly connected to the top surface of the rack, a fixed support is fixedly connected to the top surface of the fixed base, a driving gear is movably connected to the inside of the fixed support, a driving block is movably connected to the right side of the outer wall of the driving gear, a driving arm is movably connected to the outer wall of the driving block, a driving roller is movably connected to the right side of the bottom end of the driving arm, and a driving cam is movably connected to the outer wall of the driving roller. The device drives fourth drive gear through drive gear and rotates thereby to drive the set casing and remove left, and the lithium cell constantly falls into the recess of set casing from last feed bin, constantly transmits the lithium cell to soldered connection department welding, and the effect that this welding set was actual is the automatic feeding who realizes the lithium cell, and welding process between lithium cell and the utmost point ear still needs artificial cooperation to accomplish, and actual welding efficiency is not high.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a quick positioning tool structure for welding a lithium battery.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a quick positioning tool structure for lithium battery welding comprises a station disc and a welding mechanism arranged above the station disc, wherein the bottom of the station disc is connected with a rotating motor, a cell containing groove and a lug containing groove are formed in the station disc, a product ejection mechanism is arranged at the bottom of the cell containing groove, and a product unloading mechanism is arranged above the station disc;

a battery cell conveying belt is arranged on the outer side of the station disc, and the end part of the battery cell conveying belt is positioned on one side of the battery cell accommodating groove;

and a lug conveyer belt is arranged above the station disc, and the end part of the lug conveyer belt is positioned on one side of the lug containing groove.

Further, the bottom of the station disc is connected with a rotating motor.

Further, the welding mechanism comprises a lifting plate, a plurality of welding heads are arranged on the edge of the bottom of the lifting plate, a lifting driving cylinder connected with the back surface of the lifting plate is arranged, and the welding heads are located right above the joint of the battery cell placement groove and the lug placement groove.

Further, the product ejection mechanism comprises a product supporting plate arranged at the bottom of the battery cell accommodating groove, an installation box arranged at the bottom of the station disc, and a product ejection cylinder arranged in the installation box and connected with the product supporting plate.

Further, product shedding mechanism is including installing the stripper of station dish top installs a plurality of sucking discs at the stripper edge, the lift cylinder of unloading with stripper back connection, the mounting panel of being connected with the lift cylinder of unloading and the position control motor of being connected with the mounting panel, the back of stripper is equipped with the aspirator pump, and the aspirator pump passes through the hose connection the sucking disc, the sucking disc is located the top of utmost point ear arrangement groove.

Further, the bottom in electric core resettlement groove is equipped with first position sensor, the bottom in utmost point ear resettlement groove is equipped with the second position sensor, first position sensor and second position sensor connection control system.

Further, the control system includes:

the signal receiving module is used for receiving the component position signals transmitted by the first position sensor and the second position sensor;

the signal processing module is used for carrying out logic processing on the signals received by the signal receiving module and sending the execution signals to the action execution module;

and the action execution module is used for controlling the welding mechanism to descend and controlling the product ejection mechanism to eject the welded product.

Furthermore, the number of the battery cell placing grooves is multiple, the battery cell placing grooves are evenly distributed in the circumferential direction of the edge of the station disc, and the number of the welding heads is consistent with that of the battery cell placing grooves.

Further, the first position sensor and the second position sensor are DWA-Noris in model.

Further, the rotating motor is a servo motor.

Further, a phase-change material heat dissipation layer is arranged on the upper surface of the product supporting plate, and the phase-change material heat dissipation layer is polyethylene glycol (PEG-1000) with the average molecular weight of 1000.

Preferably, in order to further improve the heat dissipation performance inside the battery core, a graphene heat dissipation layer is further arranged between the product supporting plate and the phase-change material heat dissipation layer, and the thermal diffusion coefficient of the graphene heat dissipation layer is 1500mm²/s-2000mm²And the heat conduction coefficient of the graphene heat dissipation layer is 2500W/(mK) -3000W/(mK).

Furthermore, the phase-change material heat dissipation layer surrounds the product supporting plate upper surface and is arranged in a shape of a Chinese character hui and forms a first shape of a Chinese character hui, the graphene heat dissipation layer surrounds the product supporting plate upper surface and is arranged in a shape of a Chinese character hui and forms a second shape of a Chinese character hui which is embedded with the first shape of the Chinese character hui, and the phase-change material heat dissipation layer and the graphene heat dissipation layer are the same in thickness and are on the same horizontal plane.

In addition, the invention also provides a lithium battery welding method based on the rapid positioning tool structure, which comprises the following steps:

s1, product feeding: the battery core conveyer belt conveys the battery core to the battery core placing groove, and the lug conveyer belt conveys the lugs to the lug placing groove;

s2, positioning, sensing and automatically welding the product: after the first position sensor senses a position signal of the battery core, the second position sensor senses a position signal of the lug, a signal receiving module of the control system feeds the signal back to a signal processing module, the signal processing module controls a lifting driving cylinder to start through an action execution module, and the lifting driving cylinder controls a lifting plate and a welding head to move downwards to weld the joint position of the battery core and the lug;

s3, ejecting the welded product: after welding is finished, the rotary motor drives the station disc to rotate to the position of the unloading tool, the control system controls the product ejection cylinder to start, and the product ejection cylinder controls the product supporting plate to eject the product;

s4, discharging the welded product: the unloading lifting cylinder of the product unloading mechanism drives the unloading plate to move downwards, the sucking discs on the unloading plate adsorb the products after welding and drive the unloading plate to rotate by a preset angle through the position control motor, the air source of the sucking discs is disconnected, and the products are placed on the conveying belt of the next station beside the station disc, so that unloading can be completed.

The invention has the beneficial effects that: the electric core is carried electric core arrangement groove, after utmost point ear is carried utmost point ear arrangement groove, control system control soldered connection is down and weld the joining position of electric core and utmost point ear, after the welding is accomplished, the rotating electrical machines drives the station dish and rotates the position of the frock of unloading, product ejection mechanism is ejecting with the product, the frock of unloading is unloaded ejecting product, the device has realized electric core, the automatic feeding of utmost point ear, the automatic weld of electric core, utmost point ear and the automatic ejecting of product after the welding, ejecting product adsorbs and shifts to next process through the sucking disc of product shedding mechanism, electric core, utmost point ear autoloading have been realized to this equipment, the automatic weld of electric core and utmost point ear, the automatic transfer of product after the welding, unload, machining efficiency is high. Moreover, a plurality of welding stations are arranged on the station disc, so that welding processing of multiple groups of battery cores and lugs can be synchronously realized, and the efficiency of welding processing of the lithium battery is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a station disk according to the present invention;

FIG. 3 is a schematic structural view of a product discharge mechanism of the present invention;

FIG. 4 is a logic block diagram of the control system of the present invention.

Detailed Description

As shown in fig. 1, fig. 2, and fig. 3, the lithium battery welded quick positioning tool structure provided by this embodiment includes a station disc 1, and a welding mechanism disposed above the station disc 1, where the station disc 1 is provided with a cell placement groove 2 and a tab placement groove 3, the bottom of the cell placement groove 2 is provided with a product ejection mechanism, and a product discharge mechanism is disposed above the product ejection mechanism.

A battery cell conveyer belt 4 is arranged on the outer side of the station disc 1, and the end part of the battery cell conveyer belt 4 is positioned on one side of the battery cell accommodating groove 2;

and a lug conveyer belt 5 is arranged above the station disc 1, and the end part of the lug conveyer belt 5 is positioned at one side of the lug containing groove 3.

Further, rotating electrical machines 6 is connected to the bottom of station dish 1, and welding mechanism includes lifter plate 7, installs a plurality of soldered connections 8 at lifter plate 7 bottom edge, drives actuating cylinder 9 with the lift of 7 back connections of lifter plate, and soldered connection 8 is located electric core accommodation groove 2, utmost point ear accommodation groove 3 junction directly over.

The product ejection mechanism comprises a product supporting plate 10 arranged at the bottom of the battery cell accommodating groove 2, an installation box 11 arranged at the bottom of the station disc 1, and a product ejection cylinder 12 arranged in the installation box 11 and connected with the product supporting plate 10.

The product discharge mechanism comprises a discharge plate 18 arranged above the station disc 1, a plurality of suction cups 19 arranged at the edge of the discharge plate 18, a discharge lifting cylinder 20 connected with the back of the discharge plate 18, a mounting plate 21 connected with the discharge lifting cylinder 20 and an azimuth control motor 22 connected with the mounting plate 21, wherein a suction pump 23 is arranged on the back of the discharge plate 18, the suction pump 23 is connected with the suction cups 19 through a hose 24, and the suction cups 19 are positioned above the lug containing grooves 3.

Further, the bottom of the battery cell placement groove 2 is provided with a first position sensor 13, the bottom of the tab placement groove 3 is provided with a second position sensor 14, and the first position sensor 13 and the second position sensor 14 are connected with a control system.

In this embodiment, the number of the battery cell accommodating grooves 2 is plural, and the plurality of battery cell accommodating grooves 2 are uniformly arranged in the circumferential direction of the edge of the station disc 1. The first position sensor 13 and the second position sensor 14 are of the DWA-Noris type. The number of the welding heads 8 is consistent with that of the cell containing grooves 2, and the rotating motor 6 is a servo motor.

As shown in fig. 4, the control system includes:

a signal receiving module 15, configured to receive the component position signals emitted by the first position sensor 13 and the second position sensor 14;

a signal processing module 16, which performs logic processing on the signal received by the signal receiving module and sends an execution signal to the action execution module;

and the action execution module 17 is used for controlling the welding mechanism to descend and controlling the product ejection mechanism to eject the welded product.

Furthermore, a large amount of heat is generated during welding, so that the surface temperature of the battery core is too high, if the heat is not dissipated in time, the heat can be rapidly transferred into the battery core to influence the performance of the battery core, and the side reaction is easily caused when the internal temperature of the battery core is too high; therefore, in order to improve the heat dissipation performance, the upper surface of the product tray 10 is provided with a phase-change material heat dissipation layer, and the phase-change material heat dissipation layer is polyethylene glycol (PEG-1000) with an average molecular weight of 1000. Wherein, PEG-1000 is an organic solid-solid phase transition material, and the phase transition temperature of the PEG-1000 is increased along with the increase of the polymerization degree, so the average relative molecular weight of the PEG-1000 cannot be too high or too low, and when the PEG-1000 reaches the phase transition temperature (37-41 ℃), solid-solid phase transition occurs to absorb heat. Therefore, this application is through setting up this phase change material heat dissipation layer on product layer board 10 surface, and when the surface temperature of electric core was too high, surpassed this phase change material's phase transition temperature, took place solid-solid phase transition, absorbed the heat to reduce the temperature of electric core, avoid the high temperature and influence the working property of electric core, and then prolong its life.

Preferably, in order to further improve the heat dissipation performance inside the battery cell, a graphene heat dissipation layer is further arranged between the product supporting plate 10 and the phase-change material heat dissipation layer, and the thermal diffusion coefficient of the graphene heat dissipation layer is 1500mm²/s-2000mm²The heat conduction coefficient of the graphene heat dissipation layer is 2500W/(mK) -3000W/(mK); graphene has splendid horizontal and vertical heat conduction heat dispersion, and its theoretical thermal conductivity is 10 times stronger than silver, through addding graphite alkene heat dissipation layer, and it can go out the quick conduction of phase change material heat dissipation layer absorbed heat, avoids the heat to gather, and the radiating effect that will set up phase change material heat dissipation layer than single like this is better. Consequently, this application can improve the radiating effect to electric core greatly through the dual heat conduction heat dissipation layer setting on graphite alkene heat dissipation layer + phase change material heat dissipation layer.

Furthermore, the phase-change material heat dissipation layer surrounds the upper surface of the product supporting plate 10 and is arranged in a shape of a circle and forms a first shape of a circle, the graphene heat dissipation layer surrounds the upper surface of the product supporting plate 10 and is arranged in a shape of a circle and forms a second shape of a circle which is embedded with the first shape of a circle, and the phase-change material heat dissipation layer and the graphene heat dissipation layer are the same in thickness and are on the same horizontal plane. Due to the arrangement, the overall thickness of the double heat dissipation layers due to the stacking arrangement can be reduced, and the heat dissipation effect of the double heat dissipation layers on the battery cell is not influenced.

When the device is processed, the processing steps are as follows: the battery core conveying belt 4 conveys the battery core to the battery core arranging groove 2, the tab conveying belt 5 conveys the tab to the tab arranging groove 3, the first position sensor 13 senses the position signal of the battery core, the second position sensor 14 senses the position signal of the tab, the signal receiving module 15 of the control system feeds the signal back to the signal processing module 16, the signal processing module 16 controls the lifting driving cylinder 9 to start through the action execution module 17, the lifting driving cylinder 9 controls the lifting plate 7 and the welding head 8 to weld the connection position of the battery core and the tab downwards, after the welding is completed, the rotating motor 6 drives the station disc 1 to rotate to the position of the unloading tool, the control system controls the product ejecting cylinder 12 to start, the product ejecting cylinder 12 controls the product supporting plate 10 to eject the product, the unloading lifting cylinder 20 of the product unloading mechanism drives the unloading plate 18 to move downwards, the sucking disc 19 on the unloading plate 18 adsorbs the welded product and drives the unloading tool to unload through the azimuth control motor 22 The plate 18 rotates by a preset angle, the air source of the sucking disc 19 is disconnected, and the product is placed on a conveying belt of the next station beside the station disc 1, so that the unloading can be completed. Moreover, a plurality of welding stations are arranged on the station disc, so that welding processing of multiple groups of battery cores and lugs can be synchronously realized, and the efficiency of welding processing of the lithium battery is improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.