Semi-automatic assembling equipment and method for symmetrical batteries

Abstract

The invention discloses semi-automatic assembling equipment and method for symmetrical batteries, which can realize semi-automatic assembling of the symmetrical batteries, reduce the manual participation degree and improve the battery assembling efficiency to be consistent with that of finished products in the same batch. The assembling equipment comprises a storage device for storing trays with pole pieces in batches, a conveying device for conveying the trays to move among a detection station, a processing station and a discharging station, a tracing mechanism for detecting quality and tracing, a pole piece processing device for cutting and regional powder scraping, and a heat-sealing liquid injection device for edge sealing and liquid injection, the traceability mechanism comprises a transfer device for transferring the pole piece and a CCD (Charge Coupled Device) camera for detecting quality and traceability; the actions of feeding, discharging and Pock bag assembling are all executed manually, and semi-automation is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of symmetrical batteries, and in particular relates to a semi-automatic assembly device and method for symmetrical batteries. Background Art

[0002] The symmetric cell is composed of two identical working electrodes and is a simplified electrochemical system that is particularly suitable for electrochemical analysis and degradation diagnostics, and has superior advantages in evaluating some key electrode properties, such as reversibility and ion / electron transport kinetics. This cell configuration is critical for obtaining the electrochemical characteristics of the electrode, which helps to verify the potential of the electrode in actual batteries and provide useful feedback for further modifications. How to correctly obtain accurate information about electrode characteristics and electrode degradation from symmetric cells is crucial to accelerating the progress of the battery revolution.

[0003] Currently, the production of symmetrical batteries is difficult and time-consuming, especially the manual powder scraping requires extremely strict operating techniques and is labor-intensive. Moreover, symmetrical batteries can only be assembled manually in a glove box, the battery assembly efficiency is low, and the consistency of the finished product cannot be guaranteed, which has a great impact on data research. Summary of the invention

[0004] The main purpose of the present invention is to provide a semi-automatic assembly device and method for symmetrical batteries, which can solve the problems existing in the prior art, realize the semi-automatic assembly of symmetrical batteries, reduce manual participation, and improve the battery assembly efficiency and the consistency of the finished products in the same batch.

[0005] In order to achieve the above object, one of the solutions of the present invention is: A symmetrical battery semi-automatic assembly device, comprising a storage device, a conveying device, a traceability mechanism, a pole piece processing device and a heat-sealing liquid injection device; a material tray with pole pieces placed thereon is manually inserted into an array of the storage device to realize batch storage; during operation, the storage device transfers the material trays to the conveying device one by one, and the conveying device transfers the material trays output by the storage device to an inspection station, a processing station and a material unloading station; the traceability mechanism is located at the inspection station, and comprises a transfer device and a CCD camera, and the transfer device transfers the pole pieces on the material tray located at the inspection station to the CCD camera, and the CCD camera performs Real-time surface quality inspection and code scanning for traceability; the electrode processing device is located at the processing station, and uses laser technology to perform cutting and regional powder scraping on the electrode; after cutting and powder scraping, the conveying device moves the material tray to the inspection station for further inspection, and then moves to the unloading station, where the material tray is taken manually and the electrode on it is inserted into the Pock bag of the symmetrical battery to assemble into a semi-finished product of the symmetrical battery, and then the semi-finished product is placed in the heat sealing and liquid injection device; the heat sealing and liquid injection device performs the actions of heat sealing the battery edge and injecting electrolyte on the semi-finished product to assemble it into a finished product of the symmetrical battery, and the finished product is taken out from the heat sealing and liquid injection device manually.

[0006] The processing station and unloading station of the assembly equipment are respectively located at the two ends of the conveying device, the detection station is located between the processing station and the unloading station, the storage device is located between the unloading station and the detection station, and the heat sealing injection device is located next to the end of the conveying device adjacent to its unloading station.

[0007] The material storage device includes a tray rack that can move along the Y-axis and the Z-axis, and a discharge ejector block that can move along the Y-axis; the tray rack is provided with at least one row of tray slots along the Z-axis direction, and the gap between the upper and lower walls of the tray slots matches the thickness of the tray; the discharge ejector block is opposite to one of the tray slots as the tray rack moves along the Z-axis, and ejects the corresponding tray through its own Y-axis movement to move it to the conveying device.

[0008] Preferably, the upper and lower walls of the outer opening of the material tray groove are both provided with guiding inclined surfaces; the material storage device comprises a material storage base, a movable material storage bracket and a fixed material storage bracket; the movable material storage bracket is slidably fitted on the material storage base along the Y-axis; the fixed material storage bracket is relatively fixed to the material storage base and movably penetrates the movable material storage bracket; the material tray rack is slidably fitted on the movable material storage bracket along the Z-axis; the material discharge top block is slidably fitted on the fixed material storage bracket along the Y-axis.

[0009] Preferably, the material storage base is provided with a material storage Y-axis guide rail for guiding the material storage movable bracket, and a material storage Y-axis module for driving the material storage movable bracket; the material storage fixed bracket is installed with a material storage Y-axis cylinder, and the material discharge top block is installed at the output end of the material storage Y-axis cylinder; the material storage movable bracket is provided with a material storage Z-axis guide rod for guiding the material tray rack, and a material storage Z-axis module for driving the material tray rack.

[0010] The conveying device includes a conveying X-axis module for outputting X-axis power, and a tray loading seat driven by the conveying X-axis module to move in the X-axis. The tray loading seat is provided with a tray loading trough matching the width of the tray, both ends of the Y-axis of the tray loading trough are open, and tray loading pressure plates are provided on both sides of the Y-axis of the tray loading trough.

[0011] Preferably, the symmetrical battery semi-automatic assembly equipment includes an ejection device, which includes a material unloading ejector block capable of Y-axis movement; the conveying device includes a tray unloading seat fixed to the side of the conveying X-axis module facing away from the storage device; the tray unloading seat is located at the unloading station and is provided with a tray unloading trough matching the width of the tray, both ends of the Y-axis of the tray unloading trough are open, and tray unloading pressure plates are provided on both sides of the Y-axis of the tray unloading trough; the ejection device includes an ejection Y-axis cylinder for driving the unloading ejector block, an ejection bracket for fixing the ejection Y-axis cylinder, and an ejection Y-axis guide rail provided on the ejection bracket for guiding the unloading ejector block.

[0012] The transfer device comprises a transfer bracket arranged at the detection station, and a pole piece suction cup capable of moving along the Y axis and the Z axis relative to the transfer bracket, and the CCD camera is located beside the transfer bracket.

[0013] Preferably, the transfer device includes a transfer Y-axis module fixed to the transfer bracket, a transfer Z-axis module driven by the transfer Y-axis module, and a suction cup fixing frame driven by the transfer Z-axis module, and the pole piece suction cup is installed below the suction cup fixing frame; the suction cup fixing frame is provided with a suction cup mounting plate, and the pole piece suction cup is provided with a plurality of suction cup guide columns movably penetrated through the suction cup mounting plate, and the suction cup guide column is provided with a suction cup buffer spring whose two ends respectively abut the suction cup mounting plate and the pole piece suction cup.

[0014] The symmetrical battery semi-automatic assembly equipment includes a manually operated barcode scanning gun.

[0015] The pole piece processing device comprises a pole piece processing bracket located at a processing station, and a laser installed on the pole piece processing bracket for outputting high-power laser.

[0016] Preferably, the pole piece processing bracket is a Z-axis module, and the pole piece processing device includes a laser mounting bracket installed at the output end of the pole piece processing bracket, a pole piece pressure plate located below the laser mounting bracket, and a plurality of pressure plate buffer springs; the laser mounting bracket is provided with a buffer plate; the pole piece pressure plate is provided with a plurality of pressure plate guide columns movably penetrated through the buffer plate; the pressure plate buffer spring is sleeved on the pressure plate guide column and its two ends respectively abut against the buffer plate and the pole piece pressure plate; the laser is mounted on the laser mounting bracket and penetrated downward through the buffer plate and the pole piece pressure plate; the conveying device is provided with a dust collection box at the processing station, the dust collection box is located below the laser, and baffles are provided on three sides of the dust collection box, and a feeding tray enters and exits on the side without baffles; a funnel is provided below the dust collection box; the pole piece processing device includes a detection bracket located next to the laser mounting bracket, a photoelectric sensor is installed on the detection bracket, and a baffle movably penetrated through the photoelectric sensor is installed on the side wall of the laser mounting bracket.

[0017] The heat-sealing and liquid-injecting device comprises a lifting seat for Z-axis movement, a pair of opening and closing brackets which are openably arranged on both sides above the lifting seat, a bottom sealing head, a side sealing head and a negative pressure suction head which are sequentially installed on the opening and closing brackets from bottom to top, and a liquid-injecting head for injecting electrolyte; the lifting seat is provided with an automatically opening and closing clamp for clamping the semi-finished product and exposing its edge for heat sealing; the bottom sealing head and the side sealing head are arranged in pairs, respectively used for heat-sealing the upper and lower bottom edges and the left and right side edges of the semi-finished product; the negative pressure suction head is used for providing negative pressure to suck the left and right side walls of the Pock bag so that its upper opening is opened for convenient liquid injection.

[0018] Preferably, the heat sealing and liquid injection device comprises a heat sealing and liquid injection bracket, and a heat sealing Z-axis module, a heat sealing X-axis module and a liquid injection X-axis module installed on the heat sealing and liquid injection bracket; the heat sealing Z-axis module is used to drive the lifting seat to move in the Z-axis to enter or exit the opening and closing bracket; the heat sealing X-axis module is used to drive the opening and closing bracket to move relative to the X-axis to achieve the opening and closing action; the liquid injection head is located on the side of the opening and closing bracket, and enters and exits the top of the lifting seat under the drive of the liquid injection X-axis module position; the top surface of the opening and closing bracket is provided with a make way groove for the injection head to pass through; the heat sealing injection device comprises a waste liquid tank arranged below the moving track of the injection head, the upper surface of the waste liquid tank is a concave curved surface or a conical surface, and a plug hole is arranged at the center position of the upper surface of the waste liquid tank; the heat sealing injection device comprises a code spray gun; the code spray gun is located at the lower end of the Z-axis track of the lifting seat; the heat sealing injection device comprises an electrolyte container, and the electrolyte container is connected to the injection head through a hose.

[0019] The second solution of the present invention is: A symmetrical battery semi-automatic assembly method, using the symmetrical battery semi-automatic assembly device, comprising: Step 1: manually transfer a ziplock bag containing a batch of electrode pieces into a glove box through a transition bin, manually use a barcode scanner to scan the QR code of the ziplock bag and the QR code of the corresponding material tray, then put the electrode piece into the material tray, and then put the material tray into the storage device until all the electrode pieces in the ziplock bag are processed; Step 2, the material storage device transfers the material trays therein to the conveying device one by one, and the conveying device transfers the material trays output by the material storage device to the inspection station, the processing station and the unloading station in sequence; Step 3: At the inspection station, the electrode piece is transferred to the CCD camera by the transfer device and real-time surface quality inspection and code scanning and traceability are performed on the electrode piece, and then the transfer device puts the electrode piece back on the tray; Step 4: At the processing station, the pole piece processing device uses laser technology to perform cutting and regional powder scraping on the pole piece; Step 5, the conveying device returns the material tray to the inspection station and performs an action of inspecting the processing quality of the electrode piece; Step 6: At the unloading station, the material tray and its pole pieces are manually taken away, and the pole pieces are placed into pre-assembled Pock bags to assemble into semi-finished products of symmetrical batteries, and then the semi-finished products are placed into the heat-sealing and liquid-injecting device; Step 7: The heat-sealing and liquid-injecting device heat-seals the edges of the semi-finished product and injects electrolyte to assemble it into a finished symmetrical battery. Finally, the finished product is taken out manually from the heat-sealing and liquid-injecting device.

[0020] After adopting the above technical solution, the present invention has the following technical effects: (1) The present invention can complete the assembly of symmetrical batteries in a semi-automatic manner, with only manual operations such as pole piece loading, pole piece unloading, semi-finished product assembly, and finished product unloading. Such operations require low operating accuracy and will not affect the quality and consistency of the finished products. This reduces manual involvement to a certain extent, which is conducive to improving battery assembly efficiency and the consistency of finished products in the same batch; (2) The present invention retains a certain degree of manual participation through a semi-automatic method, and can rely on manual experience, operation and traceability mechanism to control some processes in the battery assembly process. In particular, if the quality of the electrode is unqualified after unloading, the waste can be removed in time to avoid flowing into the subsequent process, thereby avoiding waste output and waste of resources; (3) The present invention detects the electrode at least twice by using a CCD camera during the battery assembly process, so that the electrode can be traced before and after processing, and the quality of the electrode before battery assembly is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a specific embodiment of the present invention; Figure 2 A top view of a specific embodiment of the present invention; Figure 3 It is a three-dimensional diagram of the pole piece conveying part of a specific embodiment of the present invention; Figure 4 It is a top view of the pole piece conveying part of a specific embodiment of the present invention; Figure 5 It is a three-dimensional diagram of a material storage device according to a specific embodiment of the present invention; Figure 6 It is a partial three-dimensional diagram of a material storage device according to a specific embodiment of the present invention; Figure 7 A three-dimensional diagram of a conveying device according to a specific embodiment of the present invention; Figure 8 The transfer device of the specific embodiment of the present invention is a three-dimensional Figure 1 ; Fig. 9 The transfer device of the specific embodiment of the present invention is a three-dimensional Figure 2 ; Fig.10 The electrode processing device of the specific embodiment of the present invention is a three-dimensional Figure 1 ; Fig.11 The electrode processing device of the specific embodiment of the present invention is a three-dimensional Figure 2 ; Fig.12 A three-dimensional diagram of an ejection device according to a specific embodiment of the present invention; Fig.13 A three-dimensional diagram of a heat-sealing liquid injection device according to a specific embodiment of the present invention; Fig.14 It is a front view of a heat sealing and liquid injection device according to a specific embodiment of the present invention; Fig.15 A top view of a heat-sealing liquid injection device according to a specific embodiment of the present invention; Description of Figure Numbers: 1- material storage device; 11- material tray rack; 111- material tray slot; 1111- guide slope; 12- material discharge top block; 13- material storage base; 14- material storage movable bracket; 15- material storage fixed bracket; 16- material storage Y-axis guide rail; 17- material storage Y-axis module; 18- material storage Y-axis cylinder; 19- material storage Z-axis guide rod; 110- material storage Z-axis module; 2- conveying device; 21- conveying X-axis module; 22- tray loading seat; 221- tray loading trough; 222- tray loading pressure plate; 23- tray unloading seat; 231- tray unloading trough; 232- tray unloading pressure plate; 24- dust collection box; 25- baffle; 26- funnel; 3-pole processing device; 31-pole processing bracket; 32-laser; 33-laser mounting bracket; 331-buffer plate; 34-pole pressing plate; 341-pressing plate guide column; 35-pressing plate buffer spring; 36-detection bracket; 37-photoelectric sensor; 38-blocking plate; 4-heat sealing and liquid injection device; 41-lifting seat; 411-clamp; 42-opening and closing bracket; 421-giving groove; 43-bottom sealing head; 44-side sealing head; 45-negative pressure suction head; 46-liquid injection head; 47-heat sealing and liquid injection bracket; 48-heat sealing Z-axis module; 49-heat sealing X-axis module; 410-liquid injection X-axis module; 420-waste liquid tank; 4201-jack; 430-injection gun; 440-electrolyte container; 5-transfer device; 51-transfer bracket; 52-pole piece suction cup; 521-suction cup guide column; 522-air guide column; 53-transfer Y-axis module; 54-transfer Z-axis module; 55-suction cup fixing frame; 551-suction cup mounting plate; 56-suction cup buffer spring; 6-CCD camera; 7- ejector device; 71- ejector block; 72- ejector Y-axis cylinder; 73- ejector bracket; 74- ejector Y-axis guide rail; 8-Broadcasting gun; a-Material tray; b-Touch screen. DETAILED DESCRIPTION

[0022] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0023] refer to Figure 1-15 As shown, the present invention discloses a symmetrical battery semi-automatic assembly equipment, which mainly includes a pole piece conveying part and a battery assembly part. The former can perform batch storage of pole pieces, output of pole pieces and CCD detection (for easy traceability) and (using laser) cutting and scraping of pole pieces, and the latter can perform heat sealing and liquid injection of semi-finished products of symmetrical batteries. In addition, the actions of storing the pole pieces in the pole piece conveying part and inserting the pole pieces into the Pock bag (including aluminum-plastic film, confined diaphragm and aluminum foil with pole ears, etc.) of the symmetrical battery after the pole pieces are cut and scraped are all performed manually, so the equipment is a semi-automatic battery assembly equipment; specifically, the assembly equipment includes a storage device 1, a conveying device 2, a traceability mechanism, a pole piece processing device 3 and a heat sealing and liquid injection device 4; The tray a containing (unprocessed) electrode pieces is manually inserted into the array of the storage device 1 to realize batch storage, that is, the electrode piece loading action is performed manually; During operation, the storage device 1 transfers the material trays a to the conveying device 2 one by one, and the conveying device 2 transfers the material trays a output by the storage device 1 to the inspection station, the processing station and the unloading station; The traceability mechanism is located at the inspection station, and includes a transfer device 5 and a CCD camera 6. The transfer device 5 transfers the electrode on the material tray a located at the inspection station to the CCD camera 6, and the CCD camera 6 performs real-time surface quality inspection and code scanning traceability on the electrode; The pole piece processing device 3 is located at the processing station, and uses laser technology to perform cutting (generally, the original pole piece sheet is divided into two) and regional powder scraping on the pole piece; After cutting and scraping, the conveying device 2 moves the material tray a to the inspection station for further inspection, and then moves it to the unloading station, where a person manually takes the material tray a and inserts the electrode piece on it into the Pock bag of the symmetrical battery to assemble the semi-finished product of the symmetrical battery, and then puts the semi-finished product into the heat sealing and liquid injection device 4; The heat-sealing and liquid-injecting device 4 performs the actions of heat-sealing the battery edge and injecting electrolyte on the semi-finished product to assemble it into a finished symmetrical battery, and the finished product is taken out from the heat-sealing and liquid-injecting device 4 manually.

[0024] Through the above scheme, the present invention can complete the assembly of symmetrical batteries in a semi-automatic manner, and only manually perform actions such as pole piece loading, pole piece unloading, semi-finished product assembly, and finished product unloading. Such actions have low requirements for operating accuracy and will not affect the quality and consistency of the finished product. To a certain extent, it reduces the degree of manual participation, which is beneficial to improving the battery assembly efficiency and the consistency of the same batch of finished products; secondly, the present invention retains a certain degree of manual participation through a semi-automatic method, and can rely on manual experience, operation and traceability mechanism to achieve control of some processes in the battery assembly process, especially after the pole piece is unloaded, if the quality is unqualified, the waste can be removed in time to avoid it from flowing into the subsequent process, avoiding waste output and waste of resources; furthermore, the present invention performs at least two inspections of the pole piece through the CCD camera 6 during the battery assembly process, so that the pole piece can be traced before and after processing, and the quality of the pole piece before battery assembly is guaranteed.

[0025] Specific embodiments of the present invention are shown below.

[0026] In this embodiment, the above-mentioned electrode conveying part is composed of the material storage device 1, the conveying device 2, the traceability mechanism and the electrode processing device 3, and the above-mentioned battery assembly part is composed of the heat sealing and liquid injection device 4. In other embodiments, the various devices in the present invention can be composed of other mechanisms having part of the functions of the assembly equipment of the present invention according to the connection sequence of the process steps. For example, the material storage device 1 and the conveying device 2 can be used to form a electrode loading mechanism for performing the storage and loading actions such as electrode storage and conveying of other battery assembly equipment, and the conveying device 2 and the electrode processing device 3 can be used to form a electrode cutting and powder scraping mechanism for performing the actions of electrode cutting and powder scraping of other battery assembly equipment.

[0027] See also Figure 1, define the vertical direction as Z axis, the horizontal conveying direction of the conveying device 2 as X axis, and the horizontal direction perpendicular to the X axis as Y axis: In this embodiment, the processing station and the unloading station are respectively located at the two ends of the conveying device 2, the detection station is located between the processing station and the unloading station, the storage device 1 is located between the unloading station and the detection station, and the heat sealing and liquid injection device 4 is located next to the end of the conveying device 2 adjacent to its unloading station. Thus, the conveying device 2 drives the material tray a to reciprocate in its conveying direction, so that the various devices of the assembly equipment of the present invention are designed to be more compact to reduce the volume of the equipment and the floor space, and the unloading station is closer to the heat sealing and liquid injection device 4, which is convenient for manual execution of corresponding actions without moving the body, thereby improving convenience. In this embodiment, the touch screen b used for numerical control of the assembly equipment is installed on the conveying device 2 or its bracket, and can be close to the worker's seat for operation.

[0028] See also Figure 5-6 , is the storage device 1 of the present invention: The above-mentioned material storage device 1 includes a tray rack 11 capable of moving along the Y-axis and the Z-axis, and a discharge ejector block 12 capable of moving along the Y-axis; the tray rack 11 is provided with at least one row of a plurality of tray slots 111 along the Z-axis direction, and the gap between the upper and lower walls of the tray slot 11 matches the thickness of the tray a so that each tray slot 11 can accommodate a tray a; the discharge ejector block 12 is opposite to one of the tray slots 111 as the tray rack 11 moves along the Z-axis, and ejects the corresponding tray a through its own Y-axis movement to move it to the conveying device 2, that is, the discharge ejector block 12 is at the same height as the conveying surface of the conveying device 2.

[0029] In some embodiments of the material storage device 1, the upper and lower walls of the outer opening of the above-mentioned tray groove 111 are provided with guiding slopes 1111, so that the outer opening of the tray groove 111 presents an outward-expanding trumpet mouth, thereby realizing guidance when manually inserting the tray a, facilitating manual and quick insertion of the tray a.

[0030] In some embodiments of the material storage device 1, the above-mentioned material storage device 1 includes a material storage base 13, a material storage movable bracket 14 and a material storage fixed bracket 15; the material storage base 13 is a fixed part and remains relatively fixed with the frame part of the assembly equipment; the material storage movable bracket 14 is slidably fitted on the material storage base 13 along the Y-axis; the material storage fixed bracket 15 is relatively fixed to the material storage base 13 and movably penetrates the material storage movable bracket 14 to avoid interfering with the Y-axis movement of the material storage movable bracket 14; the material tray rack 11 is slidably fitted on the material storage movable bracket 14 along the Z-axis, thereby realizing its own Y-axis and Z-axis movement relative to the material storage base 13; the discharge top block 12 is slidably fitted on the material storage fixed bracket 15 along the Y-axis, thereby realizing the height fixation relative to the material storage base 13 on the Z-axis and being able to move in the Y-axis relative to the material storage base 13.

[0031] Preferably, the material storage base 13 is provided with a material storage Y-axis guide rail 16 for guiding the material storage movable bracket 14, and a material storage Y-axis module 17 for driving the material storage movable bracket 14. In this embodiment, the material storage Y-axis guide rails 16 are provided on both sides of the material storage base 13, that is, the material storage Y-axis guide rails 16 are provided in pairs, and the material storage Y-axis module 17 is located between the pair of material storage Y-axis guide rails 16, so that the Y-axis movement of the material storage movable bracket 14 is more stable and not easy to shake; the material storage Y-axis module 17 is a machine that outputs power through a screw rod.

[0032] Preferably, a material storage Y-axis cylinder 18 is installed on the above-mentioned material storage fixed bracket 15, and the material discharge top block 12 is installed at the output end of the material storage Y-axis cylinder 18 to realize Y-axis movement. Of course, the material storage Y-axis cylinder 18 can be a hydraulic cylinder or other machinery capable of outputting linear reciprocating motion.

[0033] Preferably, the above-mentioned material storage movable bracket 14 is provided with a material storage Z-axis guide rod 19 for guiding the material tray frame 11, and a material storage Z-axis module 110 for driving the material tray frame 11. In this embodiment, the material storage Z-axis guide rods 19 are provided on both sides of the material storage movable bracket 14, that is, the material storage Z-axis guide rods 19 are arranged in pairs, and the material storage Z-axis module 110 is located between the pair of material storage Z-axis guide rods 19, so that the Z-axis movement of the material tray frame 11 is more stable and not easy to shake; the material storage Z-axis module 110 is a machine that outputs power through a screw rod, and the screw rod is rotated by the cooperation of accessories such as electrodes, driving wheels, belts and driven wheels.

[0034] Preferably, the material storage base 13 and the material storage movable bracket 15 may be provided with an accordion cover (not shown in the figure) for dust prevention, so as to keep the guide members and driving members clean and functionally stable.

[0035] In some embodiments of the material storage device 1, the above-mentioned material tray rack 11 is arranged in parallel with two rows of thirty material tray slots 111, which can store thirty pole pieces, greatly increasing the pole piece storage capacity of the material storage device 1, thereby increasing the single operation time of the equipment and ensuring production continuity.

[0036] See also Figure 7 , is the conveying device 2 of the present invention: The above-mentioned conveying device 2 includes a conveying X-axis module 21 for outputting X-axis power, and a tray loading seat 22 driven by the conveying X-axis module 21 to move in the X-axis. The tray loading seat 22 is provided with a tray loading trough 221 matching the width of the tray a. Both ends of the Y-axis of the tray loading trough 221 are open so that the tray a can enter and exit the tray loading trough 221 along the Y-axis direction, and tray loading pressing plates 222 are provided on both sides of the Y-axis of the tray loading trough 221 to prevent the tray a from shaking up and down in the tray loading trough 221. In this embodiment, the conveying X-axis module 21 is a linear motor or other machinery that can output linear reciprocating motion and conveniently drive the tray loading seat 22.

[0037] Furthermore, the present invention comprises Fig.12 The ejection device 7 shown in the figure comprises a discharge ejection block 71 capable of Y-axis movement; the conveying device 2 comprises a tray discharge seat 23 fixed to the side of the conveying X-axis module 21 facing away from the storage device 1; the tray discharge seat 23 is located at the discharge station and is provided with a tray discharge trough 231 matching the width of the tray a, both ends of the Y-axis of the tray discharge trough 231 are open openings so that the tray a can enter and exit the tray discharge trough 231 along the Y-axis direction, and tray discharge pressure plates 232 are provided on both sides of the Y-axis of the tray discharge trough 231 to prevent the tray a from shaking up and down in the tray discharge trough 231. Through the ejection block 71 of the ejection device 7, when the tray upper trough 221 of the conveying device 2 is relative to the tray lower trough 231 (that is, the tray a moves to the unloading station), the tray a in the tray upper trough 221 can be pushed into the tray lower trough 231, so that the tray a can be manually removed and the electrode (which has been cut and scraped) therein can be taken away.

[0038] Secondly, the ejection device 7 includes an ejection Y-axis cylinder 72 for driving the ejection block 71, an ejection bracket 73 for fixing the ejection Y-axis cylinder 72, and an ejection Y-axis guide rail 74 arranged on the ejection bracket 73 for guiding the ejection block 71.

[0039] See also Figure 8-9 , is the transfer device 5 of the present invention: The transfer device 5 includes a transfer bracket 51 arranged at the detection station, and a pole piece suction cup 52 capable of Y-axis and Z-axis movement relative to the transfer bracket 51, and a CCD camera 6 is located next to the transfer bracket 51. Through the Y-axis and Z-axis movement of the pole piece suction cup 52, the pole piece on the material tray a can be sucked away and moved to the area of ​​the CCD camera 6 for detection, code scanning and tracing, and then the pole piece is placed back on the material tray a for subsequent processes. In this embodiment, the CCD camera 6 is located in the lower area of ​​the pole piece suction cup 52, and is mainly used to detect the lower surface of the pole piece (applicable to some types of products).

[0040] Furthermore, the transfer device 5 comprises a transfer Y-axis module 53 fixed to the transfer bracket 51, a transfer Z-axis module 54 driven by the transfer Y-axis module 53, and a suction cup fixing frame 55 driven by the transfer Z-axis module 54, and the pole piece suction cup 52 is installed below the suction cup fixing frame 55. Through the power output by the transfer Y-axis module 53 and the transfer Z-axis module 54, the pole piece suction cup 52 can be moved in combination on the Y-axis and the Z-axis to perform corresponding actions.

[0041] Secondly, the suction cup fixing frame 55 is provided with a suction cup mounting plate 551, and the pole piece suction cup 52 is provided with a plurality of suction cup guide columns 521 movably penetrated through the suction cup mounting plate 551, and a suction cup buffer spring 56 is sleeved on the suction cup guide column 521, and the two ends of the suction cup mounting plate 551 and the pole piece suction cup 52 are respectively abutted against the suction cup mounting plate 551 and the pole piece suction cup 52 to achieve buffering when the pole piece suction cup 52 is pressed down. In this embodiment, the air guide column 522 of the pole piece suction cup 52 is movably penetrated through the suction cup mounting plate 551 so as to be connected with the negative pressure device, that is, the air pipe is led out from the top of the suction cup mounting plate 551 to be connected with the negative pressure device to avoid interfering with the action of the transfer device 5; a group of suction cup guide columns 521 and suction cup buffer springs 56 are provided at the four corners of the pole piece suction cup 52.

[0042] The present invention includes a manually operated barcode scanning gun 8, which is used to cooperate with the traceability mechanism to complete the overall traceability work (see below for details).

[0043] See also Figure 10-11 , is the pole piece processing device 3 of the present invention: The pole piece processing device 3 comprises a pole piece processing bracket 31 located at a processing station, and a laser 32 mounted on the pole piece processing bracket 31 for outputting high-power laser to perform cutting and regional powder scraping on the pole piece.

[0044] In some embodiments of the pole piece processing device 3, the pole piece processing bracket 31 is a Z-axis module, and the pole piece processing device 3 includes a laser mounting frame 33 mounted at the output end of the pole piece processing bracket 31, a pole piece pressure plate 34 located below the laser mounting frame 33, and a plurality of pressure plate buffer springs 35; the laser mounting frame 33 is provided with a buffer plate 331; the pole piece pressure plate 34 is provided with a plurality of pressure plate guide posts 341 movably penetrated through the buffer plate 331; the pressure plate buffer spring 35 is sleeved on the pressure plate guide post 341 and the two ends respectively abut against the buffer plate 331 and the pole piece pressure plate 34 to achieve buffering when the pole piece pressure plate 34 is pressed down; the laser 32 is mounted on the laser mounting frame 33 and penetrated downwardly through the buffer plate 331 and the pole piece pressure plate 34. Through the pole piece pressure plate 34 of the pole piece processing device 3, the pole piece can be pressed and fixed on the material tray a between laser cutting and powder scraping, so that the pole piece remains flat, and the accuracy and processing quality of laser processing are improved. In this embodiment, a group of pressure plate guide posts 341 and pressure plate buffer springs 35 are disposed at the four corners of the pole piece pressure plate 34 .

[0045] Secondly, the conveying device 2 is provided with a dust collecting box 24 at the processing station. The dust collecting box 24 is located below the laser 32, and baffles 25 are provided on three sides of the dust collecting box 24. The side without the baffle provides an opening for the material tray a to enter and exit the dust collecting box 24. At the same time, a funnel 26 is provided below the dust collecting box 24 to lead out dust. By providing the dust collecting box 24 in conjunction with the pole piece pressing plate 34, a relatively closed space can be formed during the cutting and scraping process to prevent dust leakage and flying to affect the normal operation of other devices.

[0046] Furthermore, the above-mentioned pole piece processing device 3 includes a detection bracket 36 located next to the laser mounting frame 33, and a photoelectric sensor 37 is installed on the detection bracket 36. The side wall of the laser mounting frame 33 is installed with a baffle 38 that is movably penetrated by the photoelectric sensor 37. Through the cooperation of the photoelectric sensor 37 and the baffle 38, it is possible to accurately detect whether the laser 32 is raised or lowered in place, so as to give a certain control signal according to the program setting, and achieve the purposes of automation, safety control, etc. For example, the laser 32 is allowed to be started only when the laser 32 descends to the pole piece pressure plate 34 to press the material tray a, so as to achieve the purpose of safety prevention. In this embodiment, the detection bracket 36 is a Z-axis module; preferably, the pole piece processing bracket 31 is a hand-cranked Z-axis module, that is, the height of the laser 32 is manually controlled; the detection bracket 36 is an electric Z-axis module, and the height of the photoelectric sensor 37 is controlled by the system.

[0047] See also Figure 13-15 , is the heat sealing liquid injection device 4 of the present invention: The heat-sealing and liquid-injecting device 4 comprises a lifting seat 41 capable of Z-axis movement, a pair of opening and closing brackets 42 which are openably arranged on both sides of the lifting seat 41, a bottom sealing head 43, a side sealing head 44 and a negative pressure suction head 45 which are sequentially installed on the opening and closing brackets 42 from bottom to top, and a liquid-injecting head 46 for injecting electrolyte; the lifting seat 41 is provided with a clamp 411 which can be opened and closed automatically, and is used to clamp the semi-finished product and expose its edge for heat sealing, that is, the width of the clamp 411 (in this embodiment, the width in the Y-axis direction) is 1 / 4 of the width of the semi-finished product. The size of the bottom sealing head 43 is smaller than the width of the semi-finished product so as to expose the two sides of the semi-finished product; the bottom sealing head 43 and the side sealing head 44 are arranged in pairs, respectively used to heat-seal the upper and lower bottom edges and the left and right sides of the semi-finished product, wherein the lower bottom edge is heat-sealed before liquid injection and the upper bottom edge is heat-sealed after liquid injection, so only one pair of bottom sealing heads 43 is required, and in order to avoid the need for the lifting seat 41 to move along the Y axis, the side sealing heads 44 are designed to be two pairs on the left and right in this embodiment; the negative pressure suction head 45 is used to provide negative pressure to absorb the left and right side walls of the Pock bag so that its upper opening is opened to facilitate liquid injection. The bottom sealing head 43, the side sealing head 44 and the negative pressure suction head 45 installed on the opening and closing bracket 42 that can be opened and closed left and right can automatically perform the battery edge heat sealing and electrolyte injection on the semi-finished product after the lifting seat 41 enters between the opening and closing brackets 42, with high efficiency and good product consistency; and there is no need to flip the semi-finished product during the heat sealing and liquid injection process, which can effectively avoid leakage, and the operation is simple and efficient.

[0048] In some embodiments of the heat-sealing and liquid-injecting device 4, the heat-sealing and liquid-injecting device 4 comprises a heat-sealing and liquid-injecting bracket 47 that is relatively fixed to the frame of the assembly device, and a heat-sealing Z-axis module 48, a heat-sealing X-axis module 49 and a liquid-injecting X-axis module 410 installed on the heat-sealing and liquid-injecting bracket 47; the heat-sealing Z-axis module 48 is used to drive the lifting seat 41 to move in the Z-axis to enter or exit the opening and closing bracket 42; the heat-sealing X-axis module 49 is used to drive the opening and closing bracket 42 to move relative to the X-axis to achieve the opening and closing action; the liquid-injecting head 46 is located on the side of the opening and closing bracket 42, and moves in and out of the upper position of the lifting seat 41 under the drive of the liquid-injecting X-axis module 410. In this embodiment, the heat-sealing Z-axis module 48 is a linear motor in the Z-axis direction; the heat-sealing X-axis module 49 is a combination of a guide rail, a slider, a motor and a transmission assembly; the liquid-injecting X-axis module 410 is a combination of a guide rail, a mounting frame and a cylinder, and the liquid-injecting head 46 is installed on the mounting frame.

[0049] In some embodiments of the heat-sealing injection device 4, the top surface of the opening and closing bracket 42 is provided with a clearance groove 421 for the injection head 46 to pass through, so that the injection head 46 can enter and exit the opening and closing bracket 42 without performing a lifting action, and the lifting seat 41 does not need to continue to increase the height during injection, and the overall action is smoother, simpler and more efficient.

[0050] In some embodiments of the heat-sealing liquid injection device 4, the heat-sealing liquid injection device 4 includes a waste liquid tank 420 disposed below the moving track of the liquid injection head 46, which is used to accommodate waste liquid when cleaning the liquid injection head 46. In this embodiment, the upper surface of the waste liquid tank 420 is a concave curved surface (or conical surface), and a plug hole 4201 is disposed at the center of the curved surface. The curved surface guides the liquid injection head 46 into the plug hole 4201 to achieve a sealing effect, thereby achieving the purpose of preventing waste liquid leakage.

[0051] In some embodiments of the heat sealing and liquid injection device 4, the heat sealing and liquid injection device 4 includes a coding gun 430 for coding the finished product, generally a QR code, and the QR code content includes information such as battery batch number, sequence, electrode weight, foil weight, gram capacity and active ingredient ratio.

[0052] Furthermore, the above-mentioned inkjet printer 430 is located at the lower end of the Z-axis track of the lifting seat 41, that is, at the initial position of the lifting seat 41. When the semi-finished product becomes a finished product after heat sealing (left and right sides and lower bottom edge) - liquid injection - heat sealing (upper bottom edge), it descends to the position of the inkjet printer 430 for coding. After coding, the finished product can be taken away directly by hand.

[0053] In some embodiments of the heat-sealing liquid injection device 4, the heat-sealing liquid injection device 4 includes an electrolyte container 440, which is connected to the liquid injection head 46 via a hose (not shown in the figure) for providing electrolyte.

[0054] When the present invention involves the movement of parts / components and has precise numerical requirements, sensors can be used for detection and positioning, or more precise driving parts (such as screws, stepper motors, etc.) can be used.

[0055] The present invention also discloses a semi-automatic assembly method for symmetrical batteries, using the above-mentioned assembly equipment, comprising: Step 1: manually transfer a ziplock bag containing a batch of electrode pieces into a glove box through a transition bin, manually use a barcode scanner 8 to scan the QR code of the ziplock bag and the QR code of the corresponding material tray a, then put the electrode pieces into the material tray a, and then put the material tray a into the storage device 1, until all the electrode pieces in the ziplock bag are processed; Step 2, the storage device 1 transfers the material trays a therein to the conveying device 2 one by one, and the conveying device 2 transfers the material trays a output by the storage device 1 to the inspection station, the processing station and the unloading station in sequence; Step 3: At the inspection station, the electrode piece is transferred to the CCD camera 6 by the transfer device 5 and the electrode piece is subjected to real-time surface quality inspection and code scanning and traceability, and then the electrode piece is placed back on the tray a by the transfer device 5; Step 4: At the processing station, the pole piece processing device 3 uses laser technology to perform cutting and regional powder scraping on the pole piece; Step 5, the conveying device 2 returns the material tray a to the inspection station and performs the action of inspecting the quality of the electrode processing (i.e. cutting and scraping powder); Step 6: At the unloading station, the material tray a and its pole pieces are manually taken away, and the pole pieces are placed into the pre-assembled Pock bags to assemble into a semi-finished product of a symmetrical battery, and then the semi-finished product is placed into the heat-sealing and liquid-injecting device 4; Step 7: The heat-sealing and liquid-injecting device 4 performs the actions of heat-sealing the edges of the semi-finished product and injecting electrolyte to assemble the semi-finished product into a symmetrical battery product, and finally the finished product is taken out from the heat-sealing and liquid-injecting device 4 manually.

[0056] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A symmetrical battery semi-automatic assembly device, characterized in that: It includes a material storage device, a conveying device, a traceability mechanism, a pole piece processing device and a heat sealing and liquid injection device; Manually inserting the trays with the pole pieces into the array of the storage device to achieve batch storage; During operation, the material storage device transfers the material trays to the conveying device one by one, and the conveying device transfers the material trays output by the material storage device to the inspection station, the processing station and the unloading station; The traceability mechanism is located at the inspection station, and includes a transfer device and a CCD camera. The transfer device transfers the electrode on the material tray at the inspection station to the CCD camera, and the CCD camera performs real-time surface quality inspection and code scanning traceability on the electrode; The pole piece processing device is located at the processing station and uses laser technology to perform cutting and regional powder scraping on the pole piece; After cutting and scraping, the conveying device moves the tray to the inspection station for further inspection, and then moves it to the unloading station, where a person manually takes the tray and inserts the electrode pieces on it into the Pock bag of the symmetrical battery to assemble the semi-finished product of the symmetrical battery, and then puts the semi-finished product into the heat sealing and liquid injection device; The heat-sealing and liquid-injecting device performs the actions of heat-sealing the battery edge and injecting electrolyte on the semi-finished product to assemble it into a finished symmetrical battery, and the finished product is taken out from the heat-sealing and liquid-injecting device manually.

2. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: The processing station and unloading station of the assembly equipment are respectively located at the two ends of the conveying device, the detection station is located between the processing station and the unloading station, the storage device is located between the unloading station and the detection station, and the heat sealing injection device is located next to the end of the conveying device adjacent to its unloading station.

3. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: The material storage device includes a tray rack that can move along the Y-axis and the Z-axis, and a discharge ejector block that can move along the Y-axis; the tray rack is provided with at least one row of tray slots along the Z-axis direction, and the gap between the upper and lower walls of the tray slots matches the thickness of the tray; the discharge ejector block is opposite to one of the tray slots as the tray rack moves along the Z-axis, and ejects the corresponding tray through its own Y-axis movement to move it to the conveying device.

4. The symmetrical battery semi-automatic assembly equipment according to claim 3, characterized in that: The upper and lower walls of the outer opening of the tray slot are both provided with guiding inclined surfaces; The material storage device includes a material storage base, a movable material storage bracket and a fixed material storage bracket; the movable material storage bracket is slidably fitted on the material storage base along the Y-axis; the fixed material storage bracket is relatively fixed to the material storage base and movably penetrates the movable material storage bracket; the material tray rack is slidably fitted on the movable material storage bracket along the Z-axis; the discharge top block is slidably fitted on the fixed material storage bracket along the Y-axis.

5. The symmetrical battery semi-automatic assembly equipment according to claim 4, characterized in that: The material storage base is provided with a material storage Y-axis guide rail for guiding the material storage movable bracket, and a material storage Y-axis module for driving the material storage movable bracket; A material storage Y-axis cylinder is installed on the material storage fixed bracket, and the material discharge top block is installed on the output end of the material storage Y-axis cylinder; The material storage movable bracket is provided with a material storage Z-axis guide rod for guiding the material tray rack, and a material storage Z-axis module for driving the material tray rack.

6. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: The conveying device includes a conveying X-axis module for outputting X-axis power, and a tray loading seat driven by the conveying X-axis module to move in the X-axis. The tray loading seat is provided with a tray loading trough matching the width of the tray, both ends of the Y-axis of the tray loading trough are open, and tray loading pressure plates are provided on both sides of the Y-axis of the tray loading trough.

7. The symmetrical battery semi-automatic assembly equipment according to claim 6, characterized in that: It includes an ejection device, which includes a material unloading ejection block capable of Y-axis movement; the conveying device includes a tray unloading seat fixed to the side of the conveying X-axis module facing away from the storage device; the tray unloading seat is located at the unloading station and is provided with a tray unloading trough matching the width of the tray, both ends of the Y-axis of the tray unloading trough are open, and both sides of the Y-axis of the tray unloading trough are provided with tray unloading pressure plates; The ejection device includes an ejection Y-axis cylinder for driving the ejection block, an ejection bracket for fixing the ejection Y-axis cylinder, and an ejection Y-axis guide rail arranged on the ejection bracket for guiding the ejection block.

8. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: The transfer device comprises a transfer bracket arranged at the detection station, and a pole piece suction cup capable of moving along the Y axis and the Z axis relative to the transfer bracket, and the CCD camera is located beside the transfer bracket.

9. The symmetrical battery semi-automatic assembly equipment according to claim 8, characterized in that: The transfer device comprises a transfer Y-axis module fixed to the transfer bracket, a transfer Z-axis module driven by the transfer Y-axis module, and a suction cup fixing frame driven by the transfer Z-axis module, and the pole piece suction cup is installed below the suction cup fixing frame; The suction cup fixing frame is provided with a suction cup mounting plate, and the pole piece suction cup is provided with a plurality of suction cup guide columns movably penetrated through the suction cup mounting plate, and the suction cup guide column is sleeved with a suction cup buffer spring whose two ends respectively abut against the suction cup mounting plate and the pole piece suction cup.

10. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: Including manually operated barcode scanning guns.

11. The symmetrical battery semi-automatic assembly equipment according to claim 1, characterized in that: The pole piece processing device comprises a pole piece processing bracket located at a processing station, and a laser installed on the pole piece processing bracket for outputting high-power laser.

12. The symmetrical battery semi-automatic assembly equipment according to claim 11, characterized in that: The pole piece processing bracket is a Z-axis module, and the pole piece processing device includes a laser mounting bracket installed at the output end of the pole piece processing bracket, a pole piece pressure plate located below the laser mounting bracket, and a plurality of pressure plate buffer springs; the laser mounting bracket is provided with a buffer plate; the pole piece pressure plate is provided with a plurality of pressure plate guide columns movably penetrated through the buffer plate; the pressure plate buffer spring is sleeved on the pressure plate guide column and the two ends abut against the buffer plate and the pole piece pressure plate respectively; the laser is installed on the laser mounting bracket and penetrated downward through the buffer plate and the pole piece pressure plate; The conveying device is provided with a dust collection box at the processing station, the dust collection box is located below the laser, and baffles are provided on three sides of the dust collection box, and the side without baffles is used for feeding the material tray in and out; a funnel is provided below the dust collection box; The pole piece processing device comprises a detection bracket located beside the laser mounting frame, a photoelectric sensor is installed on the detection bracket, and a baffle movably penetrated through the photoelectric sensor is installed on the side wall of the laser mounting frame.

13. The semi-automatic symmetric battery assembly device according to claim 1, characterized in that: The heat-sealing and liquid-injecting device comprises a lifting seat for Z-axis movement, a pair of opening and closing brackets which are openably arranged on both sides above the lifting seat, a bottom sealing head, a side sealing head and a negative pressure suction head which are sequentially installed on the opening and closing brackets from bottom to top, and a liquid-injecting head for injecting electrolyte; the lifting seat is provided with an automatically opening and closing clamp for clamping the semi-finished product and exposing its edge for heat sealing; the bottom sealing head and the side sealing head are arranged in pairs, respectively used for heat-sealing the upper and lower bottom edges and the left and right side edges of the semi-finished product; the negative pressure suction head is used for providing negative pressure to suck the left and right side walls of the Pock bag so that its upper opening is opened for convenient liquid injection.

14. The semi-automatic symmetric battery assembly device according to claim 13, characterized in that: The heat sealing and liquid injection device comprises a heat sealing and liquid injection bracket, and a heat sealing Z-axis module, a heat sealing X-axis module and a liquid injection X-axis module installed on the heat sealing and liquid injection bracket; the heat sealing Z-axis module is used to drive the lifting seat to move in the Z-axis to enter or exit the opening and closing bracket; the heat sealing X-axis module is used to drive the opening and closing bracket to move relative to the X-axis to achieve the opening and closing action; the liquid injection head is located on the side of the opening and closing bracket, and enters and exits the upper position of the lifting seat under the drive of the liquid injection X-axis module; The top surface of the opening and closing bracket is provided with a clearance groove for the liquid injection head to pass through; The heat-sealing liquid injection device comprises a waste liquid tank arranged below the moving track of the liquid injection head, the upper surface of the waste liquid tank is a concave curved surface or a conical surface, and a plug hole is arranged at the center position of the upper surface of the waste liquid tank; The heat-sealing liquid injection device includes a code-spraying gun; the code-spraying gun is located at the lower end of the Z-axis track of the lifting seat; The heat-sealing liquid injection device comprises an electrolyte container, and the electrolyte container is connected to the liquid injection head through a hose.

15. A method for semi-automatic assembly of symmetrical batteries, using the semi-automatic assembly equipment for symmetrical batteries as claimed in any one of claims 1 to 14, characterized in that include: Step 1: manually transfer a ziplock bag containing a batch of electrode pieces into a glove box through a transition bin, manually use a barcode scanner to scan the QR code of the ziplock bag and the QR code of the corresponding material tray, then put the electrode piece into the material tray, and then put the material tray into the storage device until all the electrode pieces in the ziplock bag are processed; Step 2, the material storage device transfers the material trays therein to the conveying device one by one, and the conveying device transfers the material trays output by the material storage device to the inspection station, the processing station and the unloading station in sequence; Step 3: At the inspection station, the electrode piece is transferred to the CCD camera by the transfer device and real-time surface quality inspection and code scanning and traceability are performed on the electrode piece, and then the transfer device puts the electrode piece back on the tray; Step 4: At the processing station, the pole piece processing device uses laser technology to perform cutting and regional powder scraping on the pole piece; Step 5, the conveying device returns the material tray to the inspection station and performs an action of inspecting the processing quality of the electrode piece; Step 6: At the unloading station, the material tray and its pole pieces are manually taken away, and the pole pieces are placed into pre-assembled Pock bags to assemble into semi-finished products of symmetrical batteries, and then the semi-finished products are placed into the heat-sealing and liquid-injecting device; Step 7: The heat-sealing and liquid-injecting device heat-seals the edges of the semi-finished product and injects electrolyte to assemble it into a finished symmetrical battery. Finally, the finished product is taken out manually from the heat-sealing and liquid-injecting device.

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