CN115207432A - Module stacking workstation and stacking quality control method - Google Patents

Abstract

The invention relates to a module stacking workstation and a stacking quality control method, which comprise the following steps: the robot B, a shaping workbench, a fastening rivet pulling workbench and a safety test bench; the robot B is used for testing the polarity, the open-circuit voltage, the alternating current internal resistance and the self-discharge rate of the battery cell when the battery cell is grabbed, and the quality is controllable before the incoming material is assembled; the shaping workbench is used for shaping the side surface and the top surface of the stacked battery module and controlling the shaping quality; the fastening rivet pulling workbench is used for automatically executing a tightening procedure and performing double control on a torque corner; the safety test bench is used for automatically carrying out safety test on the stacked assemblies; the module stacking quality control method comprises the steps of battery cell sorting; stacking the modules; shaping the module; screwing and pulling rivet; safety testing; the invention has high production efficiency and meets the 100 percent detection and quality control of key processing data; the island type layout of the equipment is realized, the technical process is self-closed, the productivity can be rapidly improved through station replication, and the production process is not influenced.

Description

Module stacking workstation and stacking quality control method

Technical Field

The invention belongs to the technical field of new energy power battery manufacturing, and relates to a module stacking workstation and a stacking quality control method.

Background

The square module is one of the common battery structure forms of the electric automobile, and has the advantages of simple grouping form, high volume utilization rate, convenience in heat management and the like, so that the market share is high. The interior of the conventional square module should include the following components, the structure of which is shown in fig. 1:

1) Battery cell

2) Battery core spacing material (aerogel pad, air duct plate, structural adhesive, etc.)

3) Side plate

4) End plate

5) Sampling circuit (Integrated Circuit Board (PCB), flexible sampling Circuit (FPC))

6) Wiring harness isolation board

7) Busbar (aluminum bar, copper bar)

8) Module upper cover

9) Bottom insulating film

10 Output electrode base

11 Output electrode protection cover

The module stacking is one of key processes for manufacturing square modules, namely, parts such as a battery cell, an aerogel cushion (or an air duct), a side plate, an end plate, a wire harness isolation plate and an insulation sheet are stacked and grouped according to the direction and the sequence specified by design, the side plate and the end plate are extruded to the specified size after shaping, and the side plate and the end plate are fixed by welding or screwing to form a semi-finished product process with a compact structure and an appropriate size.

The technological process and the processing equipment of the traditional automatic module production line are shown in the following table:

traditional module production line of battery enterprise, the module piles up the workshop section and all designs for rectangular shape overall arrangement, connects each processing station through the rollgang, and figure 2 is traditional overall arrangement block diagram:

the equipment layout is loose, the subsequent productivity is difficult to promote, the influence of the transformation process on normal production is large, and the transformation is not facilitated.

CN111384427A relates to the field of power battery production, in particular to a power battery module stacking device and method, wherein the power battery module stacking device comprises a turntable mechanism for converting stations and at least one stacking fixture arranged on the turntable mechanism, the turntable mechanism drives the stacking fixture to rotate around a first cover plate feeding station, a small module feeding station and a second cover plate feeding station, the first cover plate feeding station is provided with a first cover plate caching mechanism and a first cover plate feeding mechanism, a small module feeding production line and a small module feeding mechanism are arranged on the small module feeding station, and the second cover plate feeding station is provided with a second cover plate caching mechanism and a second cover plate feeding mechanism. The stacking of the power battery modules can be realized through the matching of the small module feeding mechanism, the first cover plate feeding mechanism, the second cover plate feeding mechanism, the turntable mechanism and the stacking fixture, and the working efficiency is effectively improved.

CN113363685A provides a module stacking device and method, and relates to the technical field of battery manufacturing. The device comprises a workbench and an insulating mechanism. The workstation is used for placing the battery module, and the battery module has a plurality of utmost point ears in at least one side of first direction, and a plurality of utmost point ears are arranged along the second direction. The insulating mechanism is connected to the workbench and used for inserting the insulating pieces into the lugs along the third direction, so that one insulating piece is arranged between every two adjacent lugs. The method comprises the steps of placing a battery module on a workbench; arranging a plurality of insulating pieces on an insulating mechanism; adjusting the position of the battery module to align the battery module with the insulation mechanism; and a plurality of insulating pieces are inserted into the plurality of tabs along a third direction through the insulating mechanism, so that one insulating piece is arranged between every two adjacent tabs. The device inserts a plurality of insulators to a plurality of utmost point ears of battery module through insulating mechanism for every two adjacent utmost point ears are separated by the insulator, have avoided utmost point ear and utmost point ear contact and arouse the short circuit.

CN113054260A discloses a shaping and compressing mechanism for a square battery module of a lithium battery, which comprises a first compressing assembly, a second compressing assembly, a locking assembly and a distance measuring assembly; the first pressing assembly is positioned above the shaping pressing station, the bottom of the first pressing assembly is provided with a plurality of lifting pressing rollers, the second pressing assembly is positioned on two sides of the shaping pressing station, and the end part of the second pressing assembly is a pressing plate capable of moving horizontally; the two ends of the module stacking tray for bearing the battery modules are provided with extrusion plates, and the side surfaces of the module stacking tray are provided with locking shafts; the locking assembly comprises a limiting sleeve and a locking positioning mechanism, wherein the limiting sleeve and the locking head are clamped tightly. The invention also discloses a shaping method, which is used for realizing the compaction of the top, two sides and two ends of the battery module. The invention has the beneficial effects that: guarantee the roughness of top, both sides to and length direction's size, can effectual assurance in the compress tightly process of module, to each critical dimension's of module control.

CN110394649a discloses an automatic battery cell stacking device, which comprises a base, wherein a first connecting plate and a second connecting plate are mounted on the upper part of the base; and the station rotary table mechanism is connected with the first connecting plate, and the upper part of the station rotary table mechanism is connected with a third connecting plate. The application provides an automatic device that piles up of electric core has solved traditional robot and has piled up electric core beat slow, with high costs and the low problem of precision, and climbing mechanism can directly jack up electric core in proper order from the tray and play and pile up the frock on, and above-mentioned about and the top have hold down mechanism to compress tightly electric core, ensure the pile high accuracy of electric core. Meanwhile, the stacking tool replaces a robot to stack, and the cost is greatly reduced. Adopt two station revolving stage forms, when the robot snatchs a module of piling up, another pile up frock and rotate and continue to pile up on climbing mechanism, greatly promoted the beat.

The above patents are of low relevance to the present application.

Disclosure of Invention

The invention aims to solve the technical problems of low production efficiency, incomplete process quality control, no record storage of process data and the like in the prior art, and provides a module stacking workstation and a stacking quality control method.

The invention provides a design scheme of a square module stacking workstation, which adopts an automatic assembly means to realize automatic stacking of modules and quality control in the stacking process.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In order to solve the technical problems, the invention adopts the following technical scheme:

a module stacking workstation comprising: the robot B5, the shaping workbench 9, the fastening rivet-pulling workbench 15 and the safety test bench 17;

the robot B5 is used for testing the polarity, the open-circuit voltage, the alternating-current internal resistance and the self-discharge rate of the battery cell when the battery cell is grabbed, the whole process is parallel to grabbing and placing, namely 100% of performance test is completed in the assembling process, and the quality is ensured to be controllable before incoming materials are assembled;

the shaping workbench 9 is used for shaping the side surfaces and the top surfaces of the stacked battery modules, the flatness is ensured through a tool, the shaping pressure and displacement are monitored in real time during shaping, and the shaping quality is controlled;

the fastening rivet-pulling workbench 15 is used for automatically executing a tightening procedure and performing double control on a torque corner;

the safety test bench 17 is used for automatically carrying out safety test on the stacked assemblies.

Further, the dual control means that an alarm is automatically given out when the point is unqualified, and a display screen indicates the unqualified point; and automatically executing a rivet pulling process, monitoring a rivet pulling position and a core pulling result by equipment, giving an unqualified alarm prompt, and indicating an unqualified point position by a display screen.

Furthermore, the safety test board 17 mainly measures the insulation resistance and the leakage current between the battery cell pole columns, the insulation resistance and the leakage current of the battery cell to the module shell automatically judges whether the battery cell is qualified or not, and gives an alarm for unqualified products, and the battery cell is automatically off-line after being out of the station.

A module stacking workstation further comprises a robot A3 and a robot C12;

the robot A3 is used for matching with a special clamp and grabbing an end plate and an air duct;

and the robot C is provided with a special clamp for realizing grabbing of the side plates, the wiring harness isolation plates and the stacking assembly.

The utility model provides a workstation is piled up to module, still includes piles up revolving stage 7, it has electric core, end plate, wind channel positioning fixture to pile up 7 left and right sides designs of revolving stage, and robot A3 snatchs the end plate and wind channel, robot B5 snatchs electric core, puts according to product design direction in turn and piles up 7 right side's anchor clamps, piles up full back, and the revolving stage turns to the left side with the work piece, and robot C12 snatchs work piece in groups, puts to plastic workstation 9 on for realize that end plate, electric core, wind channel pile up.

The utility model provides a workstation is piled up to module, still including restrict the tray circulation temporarily store the platform 11 be used for empty tray by the fastening rivet workstation 15 transport to the buffer memory of shaping workstation 9 in-process.

A module stacking quality control method comprises the following steps:

the method comprises the following steps: electric core sorting: the robot A moves to a cell loading position 1, a code scanner is used for scanning a cell two-dimensional code to be grabbed, and a cell assembly number is read; after reading is finished, the robot A clamp grabs the battery cell and transfers the battery cell to the stacking turntable 7 from the battery cell loading position 1; in the transferring process, the PLC controls the digital multimeter to detect the open-circuit voltage of the battery core, judge whether the battery core is qualified or not, compare the battery core with the same battery core offline detection result transmitted by a supplier, automatically calculate the self-discharge rate and judge whether the battery core is qualified or not; after the open-circuit voltage and the self-discharge rate are judged, the PLC controls the alternating current internal resistance tester to detect the alternating current internal resistance of the battery cell and judge whether the battery cell is qualified or not; and the detection results are bound with the battery cell assembly number, uploaded to an information system and transmitted to a post-process and workshop central control system.

Step two: module stacking: the robot B grabs the battery cell and places the battery cell on the stacking table, and the positions of the positive electrode and the negative electrode of the battery cell are turned over and adjusted according to the polarity orientation stored in the PLC; pile up the position degree of frock guarantee battery core after putting.

Step three: shaping a module: the robot C grabs the stacked battery cell, the air duct and the end plate parts, places the battery cell, the air duct and the end plate parts on a shaping table, tightly presses the upper part and the side surface of the battery cell through a servo mechanism, and pressurizes the end plate to a specified length;

step four: screwing and pulling rivet: the linear servo mechanism controls the tightening gun and the hand riveter to be aligned to the mounting hole, the high-precision tightening gun monitors the tightening torque and the turning angle, the bolt assembly is ensured to meet the requirements, the unqualified alarm prompt is carried out, and the unqualified information is uploaded to an information system;

step five: and (4) safety testing: actuating mechanism drives the test probe, and with electric core utmost point post and module curb plate contact, PLC control ann rule tester carries out between the electric core utmost point post and electric core utmost point post to the insulation resistance and the leakage current detection of casing, ensures insulating and withstand voltage qualified.

Furthermore, a detection probe is designed on the battery cell clamp, and a probe head is in contact with a battery cell pole column to realize physical connection.

In the first step, the detection results refer to the open-circuit voltage of the battery core, the alternating current internal resistance measurement value and the self-discharge rate of the battery core obtained through calculation.

In the compression process of the third step, the extrusion force is monitored through a pressure sensor, the compression length is controlled through a linear servo, and the flatness of the side face and the end face is guaranteed through a tool.

Compared with the prior art, the invention has the beneficial effects that:

compared with the traditional manual stacking production line, the invention realizes a full-automatic assembly production line, has high production efficiency and good consistency, and can meet the 100 percent detection and quality control of key processing data; compared with the traditional automatic production line of a battery enterprise, the stacking workstation realizes island type layout of equipment, the technological process is self-closed, and when necessary, capacity can be quickly improved through station replication, the improvement has little influence on the layout of the original production line, and the production process is not influenced.

Drawings

The invention is further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of a conventional square module;

FIG. 2 is a block diagram of a conventional module production line layout;

FIG. 3 is a schematic structural diagram of a module stacking station according to the present invention;

FIG. 4 is a schematic view of a module stacking station process;

FIG. 5 is a workstation information acquisition system architecture diagram;

in the figure: 1. a battery cell feeding roller way; 2. an air duct trolley positioning structure; 3. a robot A; 4. an end plate feeding workbench; 5. a robot B; 6. a cell NG platform; 7. a stacking turntable; 8. stacking the NG tables; 9. a shaping workbench; 10. a side plate feeding workbench; 11. restricting the tray to flow to the temporary storage table; 12. a robot C; 13. a wire harness isolation plate feeding workbench; 14. the automatic screw feeding device for the screws; 15. fastening a rivet pulling workbench; 16. the automatic rivet supplying device for the rivets; 17. a safety test bench; 18. a work enclosure; 19. a rollgang.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the invention.

The invention is described in detail below with reference to the attached drawing figures:

the invention provides an island-type layout module stacking workstation, which realizes full-automatic assembly and detection capabilities of battery core sorting, module stacking, module reshaping, side plate fastening and safety test. The workstation overall arrangement is compact, and processing equipment utilization ratio is high, and production efficiency is high, has realized that process quality effectively controls and quality data 100% traces back, under the prerequisite of the same productivity demand, effectively reduces the equipment investment.

The automated workstation layout is shown in fig. 3:

the workstation comprises the following devices:

1) Electric core material loading roll table. Incoming material electricity core is deposited in former packing, is transported to the material roll table by AGV, carries and gets into workstation inside and carries out the fine positioning.

2) Air duct dolly location structure, quantity three sets. Two sets are used for wind channel material loading, and one set is used for empty tray off-line. The air channel is stored in the original package and placed on the feeding trolley, the logistics worker trolley enters the feeding station, and the mechanical device clamps the trolley for positioning.

3) Robot a. Six axis robot A cooperation special fixture snatch end plate and wind channel, and the robot is equipped with CCD visual system, and the guide anchor clamps realize accurately snatching.

4) End plate material loading workstation. The commodity circulation personnel are with the part manual put to the workstation on, and the workstation design has accurate stopper, can ensure that the part position satisfies the automatic assembly demand.

5) And an automatic robot B. Six supporting electric core anchor clamps of robot can snatch a plurality of electric cores simultaneously from electric core tray to sweep sign indicating number discernment and electric core before snatching and select separately. The robot is provided with a CCD vision system, and the clamp is guided to realize accurate grabbing.

6) And (4) an electrical core NG platform. Detect unqualified electric core and put here, can take out at the rail outside.

7) The turrets are stacked. Realize that end plate, electric core, wind channel pile up.

8) NG tables are stacked. The assembly of stacked NG is taken off line from this station.

9) A shaping workbench. The stacking assembly is placed on the workbench, the side face of the stacking assembly is shaped and compressed to a set length, and the compressed assembly is fixed by using the restraint tray.

10 ) a side panel loading station. The commodity circulation personnel with the curb plate manual put to the workstation on, the workstation design has accurate stopper, can ensure that the part position satisfies the automatic assembly demand.

11 To constrain the tray flow staging table.

12 Robot C). Six robots are equipped with special fixture, can realize curb plate, pencil division board and pile up the assembly and snatch the function. The robot is provided with a CCD vision system, and the clamp is guided to realize accurate grabbing.

13 ) a harness isolation panel loading station. The commodity circulation personnel stack up the pencil division board manually and place on the workstation, and the workstation design has accurate stopper, can ensure that the part position satisfies the automatic assembly demand.

14 Automatic screw feeding device.

15 Tightening the blind rivet work station. Realize module curb plate and the tightening of end plate and rivet fixedly.

16 Automatic rivet feeding device.

17 ) safety testing station. The actuating mechanism drives the detection probe board to be in full contact with the top cover and the side plate of the battery cell, and insulation resistance and leakage current are tested.

18 Working pens).

19 ) a rollerway. The stack assembly is transported out of the workstation.

NG represents a reject.

Wherein: the robot 5: the testing of the polarity, open-circuit voltage, alternating current internal resistance and self-discharge rate of the battery cell is completed when the battery cell is grabbed, the whole process is parallel to grabbing and placing, namely 100% of performance testing is completed in the assembling process, and the quality is controllable before incoming material assembling.

Shaping table 9: carry out side and top surface plastic to piling up good battery module, guarantee the roughness through the frock, real time monitoring plastic pressure and displacement during the plastic control to the shaping quality.

Fastening and riveting the workbench 15: automatically executing a screwing procedure, carrying out double control of torque and turning angle, automatically giving an alarm to prompt when the steel pipe is unqualified, and indicating the unqualified point position by a display screen; and automatically executing a rivet pulling process, monitoring a rivet pulling position and a core pulling result by equipment, giving an unqualified alarm prompt, and indicating an unqualified point position by a display screen.

Safety standard test bench 17: and automatically carrying out safety test on the stacked assembly. The main insulation resistance and the leakage current of measuring between the electric core post, whether the electric core is qualified to the insulation resistance and the leakage current of module shell, and the nonconforming quality warning suggestion to automatic the off-line after the leaving station.

Referring to fig. 4, the production process is as follows:

(1) Automatic robot A snatchs end plate and places on piling up revolving stage

(2) Automatic robot B snatchs electric core and places on piling up revolving stage

(3) Automatic robot A snatchs wind channel and piles up to piling up on revolving stage

(4) Fully completing the steps (2) and (3) until the module stacking is completed

(5) Automatic robot C snatchs and piles up the assembly, places on plastic workstation

(6) Finishing the shaping and the compaction of the stacked parts, and fixing by using a restraining tray

(7) Automatic robot C snatchs curb plate and places on tightening rivet-pulling workstation

(8) Automatic robot C snatchs area and piles up restraint tray of assembly and place on tightening and draw and rivet workstation

(9) Automatic installation of side plates

(10) Automatic robot C snatchs pencil division board and places on piling up assembly

(11) Automatically supplying nails for fastening and pulling rivets, and fixing the side plates and the end plates.

(12) The automatic robot C picks the fixed stacking assembly and places the stacking assembly on a roller way to perform module safety test

Description of the drawings: the direction of the arrows in fig. 4 is the direction of material flow during assembly.

The workstation described in the present invention can achieve quality control of the assembly process and 100% record traceability of critical quality data. Compare with traditional module assembly line, electric core is selected separately additionally to have used interchange internal resistance and self-discharge rate to detect, carries out the secondary check-up to electric core bar code simultaneously, confirms battery core accuracy in groups. Except for electric core sorting, the processing data for controlling and recording comprises shaping pressure, shaping displacement, tightening torque, insulation resistance and leakage current. The detailed quality control contents are shown in the following table:

a module stacking quality control method comprises the following steps:

the method comprises the following steps: electric core sorting: the robot moves to electric core material loading position 1, uses the electric core two-dimensional code that bar code scanner scanning will snatch, reads electric core assembly number. After reading, the robot clamp grabs the battery cell and transfers the battery cell from the battery cell loading position 1 to the stacking turntable 7. A detection probe is designed on the battery cell clamp, and a probe head is in contact with a battery cell pole column to realize physical connection. In the transfer process, the PLC controls the digital multimeter to detect the open-circuit voltage of the battery core, judge whether the battery core is qualified or not, compare the battery core with the same battery core offline detection result transmitted by a supplier, automatically calculate the self-discharge rate and judge whether the battery core is qualified or not. And after the open-circuit voltage and the self-discharge rate are judged, the PLC controls the alternating current internal resistance tester to detect the alternating current internal resistance of the battery core and judge whether the battery core is qualified. And the detection results are bound with the battery cell assembly number, uploaded to an information system and transmitted to a post-process and workshop central control system.

Step two: module stacking: the robot snatchs electric core and places in piling up the bench, according to the polarity orientation of the storage of PLC, the positive negative pole position of upset adjustment electric core. Pile up the position degree of frock guarantee battery core after putting.

Step three: shaping a module: the robot snatchs parts such as electric core, wind channel, the end plate that piles up, places in the plastic platform, through servo, compresses tightly electric core upper portion and side, and end plate department pressurization compresses to appointed length. In the compressing process, the extrusion force is monitored through the pressure sensor, the compressing length is controlled through the linear servo, and the flatness of the side face and the end face is guaranteed through the tool.

Step four: screwing and pulling rivet: the linear servo mechanism controls the tightening gun and the hand riveter to be aligned to the mounting hole, the high-precision tightening gun monitors the tightening torque and the turning angle, the bolt assembly is guaranteed to meet the requirements, the unqualified alarm prompt is carried out, and the unqualified information is uploaded to the information system.

Step five: and (4) safety testing: actuating mechanism drives the detection probe, and with electric core utmost point post and module curb plate contact, PLC control ann rule tester, 100% carry on between electric core utmost point post and electric core utmost point post to the insulation resistance and the leakage current detection of casing, ensure insulating and withstand voltage qualified.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims. And those not described in detail in this specification are well within the skill of those in the art.

Claims (10)

1. A module stacking station, comprising: the robot B (5), the shaping workbench (9), the fastening rivet-pulling workbench (15) and the safety test bench (17);

the robot B (5) is used for testing the polarity, the open-circuit voltage, the alternating-current internal resistance and the self-discharge rate of the battery cell when the battery cell is grabbed, the whole process is parallel to grabbing and placing, namely 100% performance test is completed in the assembling process, and the quality of the incoming materials is ensured to be controllable before assembling;

the shaping workbench (9) is used for shaping the side surface and the top surface of the stacked battery module, the flatness is ensured through a tool, the shaping pressure and displacement are monitored in real time during shaping, and the shaping quality is controlled;

the fastening rivet pulling workbench (15) is used for automatically executing a screwing process and performing double control of torque and turning angles;

and the safety test bench (17) is used for automatically carrying out safety test on the stacked assembly.

2. A module stacking station according to claim 1, wherein: the double control means that an alarm is automatically given out when the point is unqualified, and a display screen indicates the unqualified point position; and automatically executing a rivet pulling process, monitoring a rivet pulling position and a core pulling result by equipment, giving an unqualified alarm prompt, and indicating an unqualified point position by a display screen.

3. A module stacking station according to claim 2, wherein:

the safety test bench (17) is mainly used for measuring insulation resistance and leakage current between the pole columns of the battery core, automatically judging whether the insulation resistance and the leakage current of the battery core to the module shell are qualified or not, giving an alarm to unqualified products, and automatically taking off the line after the battery core is out of the station.

4. A module stacking station according to claim 3, wherein:

also comprises a robot A (3) and a robot C (12);

the robot A (3) is used for matching with a special clamp, grabbing an end plate and an air duct;

and the robot C (12) is provided with a special clamp for realizing grabbing of the side plates, the wiring harness isolation plates and the stacking assembly.

5. A module stacking station according to claim 4, wherein:

still including piling up revolving stage (7), it has electric core, end plate, wind channel positioning fixture to pile up revolving stage (7) left and right sides design, and robot A (3) snatchs end plate and wind channel, and robot B (5) snatchs electric core, puts according to product design direction in turn and piles up the anchor clamps on revolving stage (7) right side, piles up full back, and the revolving stage turns to the left side with the work piece, and robot C (12) snatchs work piece in groups, puts to plastic workstation (9) on for realize that end plate, electric core, wind channel pile up.

6. A module stacking station according to claim 5, wherein:

still including restricting tray circulation temporary storage platform (11), restrict tray circulation temporary storage platform (11) and be used for empty tray to pass to the buffer memory of plastic workstation (9) in-process by fastening rivet workstation (15).

7. A module stacking quality control method is characterized by comprising the following steps:

the method comprises the following steps: electric core sorting: the robot A moves to a battery cell loading position (1), a code scanner is used for scanning a battery cell two-dimensional code to be grabbed, and a battery cell assembly number is read; after reading is finished, the robot A clamp grabs the battery cell and transfers the battery cell to a stacking turntable (7) from a battery cell loading position (1); in the transferring process, the PLC controls the digital multimeter to detect the open-circuit voltage of the battery core, judge whether the battery core is qualified or not, compare the battery core with the same battery core offline detection result transmitted by a supplier, automatically calculate the self-discharge rate and judge whether the battery core is qualified or not; after the open-circuit voltage and the self-discharge rate are judged, the PLC controls the alternating current internal resistance tester to detect the alternating current internal resistance of the battery cell and judge whether the battery cell is qualified or not; and the detection results are bound with the battery cell assembly number, uploaded to an information system and transmitted to a post-process and workshop central control system.

Step two: module stacking: the robot B grabs the battery cell and places the battery cell on the stacking table, and the positions of the positive electrode and the negative electrode of the battery cell are adjusted in an overturning manner according to the polarity orientation stored in the PLC; pile up the position degree of frock guarantee battery core after putting.

Step three: shaping a module: the robot C grabs the stacked battery cell, the air duct and the end plate parts, places the battery cell, the air duct and the end plate parts on a shaping table, tightly presses the upper part and the side surface of the battery cell through a servo mechanism, and pressurizes the end plate to a specified length;

step four: screwing and pulling rivet: the linear servo mechanism controls the tightening gun and the hand riveter to be aligned to the mounting hole, the high-precision tightening gun monitors the tightening torque and the turning angle, the bolt assembly is ensured to meet the requirements, the unqualified alarm prompt is carried out, and the unqualified information is uploaded to an information system;

step five: and (4) safety testing: actuating mechanism drives the detection probe, and with electric core utmost point post and module curb plate contact, PLC control ann rule tester carries out between the electric core utmost point post and electric core utmost point post to the insulation resistance and the leakage current detection of casing, ensures insulating and withstand voltage qualified.

8. The method of claim 7, wherein the step of controlling the stacking quality of the module comprises the steps of:

a detection probe is designed on the battery cell clamp, and a probe head is in contact with a battery cell pole column to realize physical connection.

9. The method of claim 7, wherein the step of controlling the stacking quality of the module comprises the steps of:

in the step one, the detection results refer to the open-circuit voltage of the battery core, the alternating current internal resistance measurement value and the self-discharge rate of the battery core obtained through calculation.

10. The method of claim 7, wherein the step of controlling the stacking quality of the module comprises the steps of:

in the compression process of the third step, the extrusion force is monitored through a pressure sensor, the compression length is controlled through a linear servo, and the flatness of the side face and the end face is guaranteed through a tool.

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