Heat-sealing liquid injection device of symmetrical battery assembly equipment

Abstract

The utility model discloses a heat sealing and liquid injection device of symmetrical battery assembly equipment, which can integrally realize heat sealing and liquid injection and process semi-finished batteries into finished products. The heat-sealing liquid injection device of the symmetrical battery assembly equipment comprises a lifting seat, a pair of opening and closing brackets, a bottom sealing head, a side sealing head, a negative pressure suction head and a liquid injection head, wherein the lifting seat moves along a Z axis; the opening and closing brackets are arranged on two sides above the lifting seat in an opening and closing manner; the bottom sealing head, the side sealing head and the negative pressure suction head are sequentially mounted on the opening and closing brackets from bottom to top; the lifting seat is provided with a clamp capable of being automatically opened and closed, the clamp is used for clamping a semi-finished product and exposing the edge of the semi-finished product for heat sealing, and the semi-finished product is composed of a Pock bag and a pole piece in the Pock bag; the bottom sealing heads and the side sealing heads are arranged in pairs and used for heat sealing of the upper bottom edge, the lower bottom edge, the left side edge and the right side edge of a semi-finished product. The negative pressure suction head is used for providing negative pressure to suck the left side wall and the right side wall of the Pock bag so that an opening in the Pock bag can be opened to facilitate liquid injection.

Description

TECHNICAL FIELD

[0001] The utility model belongs to symmetrical battery technical field, especially point to a kind of symmetrical battery assembly equipment's heat-sealing liquid injection device. BACKGROUND

[0002] Symmetrical battery is composed of two identical working electrodes, is a simplified electrochemical system, especially suitable for electrochemical analysis and attenuation diagnosis, has superior advantages in evaluating some key electrode properties, such as reversibility and ion / electron transport kinetics. This battery configuration is essential for obtaining the electrochemical properties of the electrode, which helps to verify the potential of the electrode in the actual battery and provides useful feedback for further modification. How to correctly obtain accurate information about electrode properties and electrode degradation from symmetrical battery is crucial for accelerating the progress of battery.

[0003] At present, symmetrical battery is difficult to make, time-consuming, and can only be assembled by artificial in glove box, and the battery assembly efficiency is low, and the consistency of finished product cannot be guaranteed, which greatly affects data research. Specifically, the existing symmetrical battery does not have a perfect automatic structure, and the symmetrical battery semi-finished product needs to be manually placed into a heat sealer for heat sealing of the battery edge, and then transferred to a liquid injection machine for injection of electrolyte, and finally returned to the heat sealer for sealing. Workers need to move between heat sealer and liquid injection machine, which is troublesome and inefficient. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of symmetrical battery assembly equipment's heat-sealing liquid injection device, solve the problems existing in prior art, can integrally realize heat sealing, liquid injection, and process semi-finished battery to finished product.

[0005] In order to achieve the above purpose, the solution of the utility model is as follows:

[0006] A kind of symmetrical battery assembly equipment's heat-sealing liquid injection device, including the lifting seat of Z-axis movement, a pair of openable and closable supports is arranged on the two sides above the lifting seat, bottom seal head, side seal head and negative pressure suction head are installed on the openable and closable supports from bottom to top in sequence, and liquid injection head for injecting electrolyte;The lifting seat is provided with an automatic opening and closing clamp for clamping semi-finished product and exposing its edge for heat sealing, and the semi-finished product is composed of Pock bag and pole piece in it;The bottom seal head and side seal head are arranged in pairs respectively for heat sealing upper and lower edges and left and right side edges of semi-finished product;The negative pressure suction head is used to provide negative pressure to suck the left and right side walls of Pock bag to open the upper opening and facilitate liquid injection.

[0007] The hot sealing and liquid injection device comprises a hot sealing and liquid injection support, a hot sealing Z-axis module, a hot sealing X-axis module and a liquid injection X-axis module installed on the hot sealing and liquid injection support; the hot sealing Z-axis module is used for driving the lifting seat to move in the Z-axis direction to enter or exit the opening and closing support; the hot sealing X-axis module is used for driving the opening and closing support to move in the X-axis direction to realize the opening and closing action; the liquid injection head is located at the side of the opening and closing support and is driven by the liquid injection X-axis module to enter or exit the position above the lifting seat.

[0008] Preferably, the top surface of the opening and closing support is provided with a slot for the liquid injection head to pass through.

[0009] The hot sealing and 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 jack is arranged at the central position of the upper surface of the waste liquid tank.

[0010] The hot sealing and liquid injection device comprises a code spraying gun.

[0011] Preferably, the code spraying gun is located at the lower end of the Z-axis track of the lifting seat.

[0012] The hot sealing and liquid injection device comprises an electrolyte container connected with the liquid injection head through a hose.

[0013] After the above technical scheme is adopted, the hot sealing and liquid injection device has the following technical effects:

[0014] The bottom sealing head, the side sealing head and the negative pressure suction head installed on the opening and closing support capable of opening and closing left and right are used, the semi-finished product battery is only manually placed on the lifting seat and automatically clamped by the clamp, then the completely automatic battery packaging is performed, specifically, after the lifting seat enters between the opening and closing support, the series of actions of the hot sealing of the lower bottom edge and the left and right side edges of the semi-finished product, the injection of the electrolyte and the hot sealing of the upper bottom edge are sequentially performed, the finished product symmetrical battery is obtained, and the hot sealing and liquid injection device has the advantages of high efficiency and good product consistency; and the semi-finished product does not need to be turned over in the whole process, liquid leakage can be effectively avoided, and the action is simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of a specific embodiment of the utility model;

[0016] Figure 2 It is a top view of a specific embodiment of the utility model;

[0017] Figure 3 It is a perspective view of a specific embodiment of the utility model;

[0018] Figure 4 It is a top view of a specific embodiment of the utility model;

[0019] Figure 5 is a perspective view of the storage device of an embodiment of the utility model;

[0020] Figure 6 is a partial perspective view of the storage device of an embodiment of the utility model;

[0021] Figure 7 is a perspective view of the conveying device of an embodiment of the utility model;

[0022] Figure 8 is a perspective view of the transfer device of an embodiment of the utility model Figure 1 ;

[0023] Figure 9 is a perspective view of the transfer device of an embodiment of the utility model Figure 2 ;

[0024] Figure 10 is a perspective view of the pole piece processing device of an embodiment of the utility model Figure 1 ;

[0025] Figure 11 is a perspective view of the pole piece processing device of an embodiment of the utility model Figure 2 ;

[0026] Figure 12 is a perspective view of the ejection device of an embodiment of the utility model;

[0027] Figure 13 is a perspective view of the hot sealing liquid injection device of an embodiment of the utility model;

[0028] Figure 14 is a front view of the hot sealing liquid injection device of an embodiment of the utility model;

[0029] Figure 15 is a top view of the hot sealing liquid injection device of an embodiment of the utility model;

[0030] Explanation of reference numerals:

[0031] 1-storage device;11-tray rack;111-tray groove;1111-guide slope;12-ejection top block;13-storage base;14-storage movable support;15-storage fixed support;16-storage Y-axis guide rail;17-storage Y-axis module;18-storage Y-axis cylinder;19-storage Z-axis guide rod;110-storage Z-axis module;

[0032] 2-conveying device;21-conveying X-axis module;22-tray feeding seat;221-tray feeding groove;222-tray feeding pressing plate;23-tray discharging seat;231-tray discharging groove;232-tray discharging pressing plate;24-dust collection box;25-baffle;26-hopper;

[0033] 3-Electrode processing device; 31-Electrode processing bracket; 32-Laser; 33-Laser mounting bracket; 331-Buffer plate; 34-Electrode pressure plate; 341-Pressure plate guide post; 35-Pressure plate buffer spring; 36-Detection bracket; 37-Photoelectric sensor; 38-Baffle plate;

[0034] 4-Heat-sealing injection device; 41-Lifting seat; 411-Clamp; 42-Opening and closing bracket; 421-Displacement groove; 43-Bottom head; 44-Side head; 45-Negative pressure suction head; 46-Injection head; 47-Heat-sealing injection bracket; 48-Heat-sealing Z-axis module; 49-Heat-sealing X-axis module; 410-Injection X-axis module; 420-Waste liquid tank; 4201-Insertion hole; 430-Inkjet gun; 440-Electrolyte container;

[0035] 5-Transfer device; 51-Transfer bracket; 52-Electrode suction cup; 521-Suction cup guide post; 522-Air guide post; 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;

[0036] 6-CCD camera;

[0037] 7-Ejection device; 71-Discharge ejector block; 72-Ejection Y-axis cylinder; 73-Ejection bracket; 74-Ejection Y-axis guide rail;

[0038] 8-Barcode scanner;

[0039] a- Tray; b- Touchscreen. Detailed Implementation

[0040] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0041] refer to Figures 1-15 As shown, this utility model discloses a semi-automatic assembly equipment for symmetrical batteries. The assembly equipment mainly includes an electrode conveying section and a battery assembly section. The former can perform actions such as batch storage of electrode sheets, output of electrode sheets and CCD detection (for traceability), and cutting and scraping of electrode sheets (using laser). The latter can perform actions such as heat sealing and liquid injection of semi-finished symmetrical batteries. In addition, actions such as storing electrode sheets in the electrode conveying section and inserting the electrode sheets into the symmetrical battery Pock bag (including aluminum-plastic film, confinement diaphragm, and aluminum foil with tabs after cutting and scraping) are all performed manually. Therefore, this equipment is a semi-automatic battery assembly equipment. Specifically, the assembly equipment includes a material storage device 1, a conveying device 2, a traceability mechanism, an electrode sheet processing device 3, and a heat sealing and liquid injection device 4.

[0042] The material tray a containing (untreated) electrode sheets is manually inserted into the array of the storage device 1 to achieve batch storage, that is, the electrode sheet feeding action is performed manually.

[0043] During operation, the storage device 1 transfers the material trays a one by one to the conveying device 2, and the conveying device 2 transfers the material trays a output from the storage device 1 to the inspection station, the processing station and the unloading station.

[0044] 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 sheet on the material tray a at the inspection station to the CCD camera 6, and the CCD camera 6 performs real-time surface quality inspection and barcode scanning traceability on the electrode sheet.

[0045] The electrode processing device 3 is located at the processing station and uses laser technology to perform cutting (generally splitting the original electrode sheet into two) and area powder scraping on the electrode sheet;

[0046] After cutting and scraping, the conveying device 2 moves the material tray a to the inspection station for inspection, and then moves it to the unloading station. The manual person takes the material tray a and inserts the electrode sheets on it into the Pock bag of the symmetrical battery to assemble it into a semi-finished symmetrical battery. Then the semi-finished product is put into the heat sealing and liquid injection device 4.

[0047] The heat-sealing and electrolyte injection device 4 performs the actions of heat-sealing the battery edges and injecting electrolyte into the semi-finished products to assemble them into finished symmetrical batteries. The finished products are then manually removed from the heat-sealing and electrolyte injection device 4.

[0048] Through the above-described scheme, this invention can complete the assembly of symmetrical batteries in a semi-automatic manner, requiring only manual operation for tasks such as electrode loading, electrode unloading, semi-finished product assembly, and finished product unloading. These actions have low precision requirements and will not affect the quality and consistency of the finished products, thus reducing human intervention to a certain extent and improving battery assembly efficiency and the consistency of finished products in the same batch. Secondly, this invention retains a certain degree of human intervention through semi-automation, relying on human experience, operation, and the cooperation of traceability mechanisms to control some processes in the battery assembly process. In particular, if the electrode unloading is substandard, defective products can be removed in time to prevent them from flowing into subsequent processes, avoiding waste and resource waste. Furthermore, this invention performs at least two electrode inspections during battery assembly using a CCD camera 6, enabling traceability before and after electrode processing and ensuring the quality of the electrode before battery assembly.

[0049] The following are specific embodiments of the present invention.

[0050] In this embodiment, the electrode conveying section is composed of the storage device 1, the conveying device 2, the traceability mechanism, and the electrode processing device 3, and the battery assembly section is composed of the heat-sealing and liquid-injection device 4. In other embodiments, the devices in this invention can be combined to form other mechanisms with some functions of the assembly equipment of this invention according to the sequence of the processes. For example, the storage device 1 and the conveying device 2 can be combined to form an electrode feeding mechanism to perform electrode storage and conveying operations in other battery assembly equipment, and the conveying device 2 and the electrode processing device 3 can be combined to form an electrode cutting and powder scraping mechanism to perform electrode cutting and powder scraping operations in other battery assembly equipment.

[0051] See Figure 1 The vertical direction is defined as the Z-axis, the horizontal conveying direction of the conveying device 2 is defined as the X-axis, and the horizontal direction perpendicular to the X-axis is defined as the Y-axis. In this embodiment, the processing station and the unloading station are located at opposite 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 injection device 4 is located next to the end of the conveying device 2 near its unloading station. Thus, by driving the material tray a to reciprocate in its conveying direction via the conveying device 2, the assembly equipment of this invention is designed to be more compact, reducing the equipment size and floor space, and bringing the unloading station closer to the heat-sealing injection device 4, facilitating manual execution of corresponding actions without requiring physical movement, thus improving convenience. In this embodiment, the touchscreen b used for CNC machining of the assembly equipment is mounted on the conveying device 2 or its support, close to the worker's seat for easy operation.

[0052] See Figures 5-6 The storage device 1 of this utility model is as follows:

[0053] The aforementioned storage device 1 includes a tray frame 11 capable of moving along the Y-axis and Z-axis, and a discharge top block 12 capable of moving along the Y-axis. The tray frame 11 is provided with at least one row of several tray slots 111 along the Z-axis direction. The gap between the upper and lower walls of the tray slots 11 matches the thickness of the tray a so that each tray slot 11 can accommodate one tray a. The discharge top block 12 moves along the Z-axis of the tray frame 11 to be opposite to one of its tray slots 111, and pushes out the corresponding tray a through its own Y-axis movement so that it moves to the conveying device 2. That is, the discharge top block 12 is at the same height as the conveying surface of the conveying device 2.

[0054] In some embodiments of the material storage device 1, the upper and lower walls of the outer opening of the material tray groove 111 are provided with guide slopes 1111, so that the outer opening of the material tray groove 111 presents an outwardly flared mouth, thereby realizing the guidance when manually inserting the material tray a, and facilitating the manual and quick insertion of the material tray a.

[0055] In some embodiments of the storage device 1, the storage device 1 includes a storage base 13, a storage movable support 14, and a storage fixed support 15. The storage base 13 is a fixed component and is relatively fixed to the frame of the assembly equipment. The storage movable support 14 is slidably fitted onto the storage base 13 along the Y-axis. The storage fixed support 15 is relatively fixed to the storage base 13 and movably passes through the storage movable support 14 to avoid interfering with the Y-axis movement of the storage movable support 14. The tray frame 11 is slidably fitted onto the storage movable support 14 along the Z-axis, thereby realizing its own movement relative to the Y-axis and Z-axis of the storage base 13. The discharge top block 12 is slidably fitted onto the storage fixed support 15 along the Y-axis, thereby achieving a fixed height relative to the storage base 13 on the Z-axis and being able to move relative to the storage base 13 on the Y-axis.

[0056] Preferably, the storage base 13 is provided with a storage Y-axis guide rail 16 for guiding the storage movable support 14, and a storage Y-axis module 17 for driving the storage movable support 14. In this embodiment, storage Y-axis guide rails 16 are provided on both sides of the storage base 13, that is, the storage Y-axis guide rails 16 are arranged in pairs, and the storage Y-axis module 17 is located between the pair of storage Y-axis guide rails 16, so that the Y-axis movement of the storage movable support 14 is more stable and less prone to shaking; the storage Y-axis module 17 is a mechanical device that outputs power through a lead screw.

[0057] Preferably, a storage Y-axis cylinder 18 is mounted on the aforementioned storage fixing bracket 15, and a discharge top block 12 is mounted on the output end of the storage Y-axis cylinder 18 to realize Y-axis movement. Of course, the storage Y-axis cylinder 18 can be a hydraulic cylinder or other machinery capable of outputting linear reciprocating motion.

[0058] Preferably, the aforementioned movable storage support 14 is provided with a storage Z-axis guide rod 19 for guiding the tray frame 11, and a storage Z-axis module 110 for driving the tray frame 11. In this embodiment, storage Z-axis guide rods 19 are provided on both sides of the movable storage support 14, that is, the storage Z-axis guide rods 19 are arranged in pairs, and the storage Z-axis module 110 is located between the pair of storage Z-axis guide rods 19, so that the Z-axis movement of the tray frame 11 is more stable and less prone to shaking; the storage Z-axis module 110 is a machine that outputs power through a lead screw, and the lead screw rotates through the cooperation of accessories such as electrodes, driving wheels, belts and driven wheels.

[0059] Preferably, the storage base 13 and the storage movable bracket 15 can be equipped with accordion covers (not shown in the figure) for dust prevention, so as to keep the guide components and drive components clean and functionally stable.

[0060] In some embodiments of the storage device 1, the aforementioned tray rack 11 is arranged in two rows with a total of thirty tray slots 111, which can store thirty electrode sheets, greatly increasing the electrode sheet storage capacity of the storage device 1, thereby increasing the single-run time of the equipment and ensuring production continuity.

[0061] See Figure 7 The conveying device 2 of this utility model is as follows:

[0062] The aforementioned 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 along the X-axis. The tray loading seat 22 is provided with a tray loading groove 221 that matches the width of the tray a. Both ends of the tray loading groove 221 along the Y-axis are open to allow the tray a to enter and exit the tray loading groove 221 along the Y-axis direction. Tray loading pressure plates 222 are provided on both sides of the tray loading groove 221 along the Y-axis to prevent the tray a from swaying up and down within the tray loading groove 221. In this embodiment, the conveying X-axis module 21 is a linear motor or other machinery capable of outputting linear reciprocating motion and conveniently driving the tray loading seat 22.

[0063] Furthermore, this utility model includes Figure 12 The ejection device 7 shown includes a material feeding block 71 capable of moving along the Y-axis; the conveying device 2 includes a material tray feeding seat 23 fixed to the side of the conveying X-axis module 21 facing away from the storage device 1; the material tray feeding seat 23 is located at the feeding station and is provided with a material tray feeding groove 231 that matches the width of the material tray a. Both ends of the material tray feeding groove 231 along the Y-axis are open so that the material tray a can enter and exit the material tray feeding groove 231 along the Y-axis direction, and both sides of the material tray feeding groove 231 are provided with material tray feeding pressure plates 232 to prevent the material tray a from shaking up and down in the material tray feeding groove 231. When the feeding trough 221 of the conveying device 2 is opposite to the feeding trough 231 of the feeding trough (i.e., the feeding tray a moves to the feeding station), the feeding tray a in the feeding trough 221 can be pushed into the feeding trough 231 by the feeding block 71 of the feeding device 7, so that the feeding tray a can be removed manually and the electrode sheet (which has been cut and scraped off) inside can be taken away.

[0064] Secondly, the ejection device 7 includes an ejection Y-axis cylinder 72 for driving the unloading top block 71, an ejection bracket 73 for fixing the ejection Y-axis cylinder 72, and an ejection Y-axis guide rail 74 disposed on the ejection bracket 73 for guiding the unloading top block 71.

[0065] See Figures 8-9 The transfer device 5 of this utility model is as follows:

[0066] The aforementioned transfer device 5 includes a transfer bracket 51 disposed at the inspection station, and an electrode suction cup 52 capable of moving relative to the transfer bracket 51 along the Y and Z axes. A CCD camera 6 is located next to the transfer bracket 51. By moving the electrode suction cup 52 along the Y and Z axes, electrodes on tray a can be sucked away and moved to the area of ​​the CCD camera 6 for inspection and barcode scanning for traceability. The electrodes are then returned to tray a for subsequent processes. In this embodiment, the CCD camera 6 is located below the electrode suction cup 52 and is mainly used to inspect the lower surface of the electrodes (applicable to some types of products).

[0067] Furthermore, the aforementioned transfer device 5 includes 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 holder 55 driven by the transfer Z-axis module 54. The electrode suction cup 52 is mounted below the suction cup holder 55. The power output from the transfer Y-axis module 53 and the transfer Z-axis module 54 enables the electrode suction cup 52 to move in a combined manner along the Y-axis and Z-axis to perform corresponding actions.

[0068] Secondly, the aforementioned suction cup fixing frame 55 is provided with a suction cup mounting plate 551, and the electrode suction cup 52 is provided with a plurality of suction cup guide posts 521 that are movably inserted through the suction cup mounting plate 551. Suction cup buffer springs 56 are fitted on the suction cup guide posts 521, with their two ends respectively abutting against the suction cup mounting plate 551 and the electrode suction cup 52, to achieve buffering when the electrode suction cup 52 is pressed down. In this embodiment, the air guide column 522 of the electrode suction cup 52 is movably inserted through the suction cup mounting plate 551 to connect with the negative pressure device, that is, an air pipe is led out from the top of the suction cup mounting plate 551 to connect with the negative pressure device, avoiding interference with the operation of the transfer device 5; a set of suction cup guide posts 521 and suction cup buffer springs 56 are provided at each of the four corners of the electrode suction cup 52.

[0069] This utility model includes a manually operated barcode scanner 8, which is used to cooperate with the traceability mechanism to complete the overall traceability work (see below for details).

[0070] See Figures 10-11 The electrode processing device 3 of this utility model is as follows:

[0071] The aforementioned electrode processing device 3 includes an electrode processing support 31 located at the processing station, and a laser 32 mounted on the electrode processing support 31 for outputting high-power laser to perform cutting and area scraping of the electrode.

[0072] In some embodiments of the electrode processing device 3, the aforementioned electrode processing bracket 31 is a Z-axis module. The electrode processing device 3 includes a laser mounting bracket 33 installed at the output end of the electrode processing bracket 31, an electrode pressure plate 34 located below the laser mounting bracket 33, and several pressure plate buffer springs 35. The laser mounting bracket 33 is provided with a buffer plate 331. The electrode pressure plate 34 is provided with several pressure plate guide posts 341 that are movably inserted through the buffer plate 331. The pressure plate buffer springs 35 are sleeved on the pressure plate guide posts 341 and their two ends respectively abut against the buffer plate 331 and the electrode pressure plate 34 to achieve buffering when the electrode pressure plate 34 is pressed down. The laser 32 is mounted on the laser mounting bracket 33 and passes downward through the buffer plate 331 and the electrode pressure plate 34. Through the electrode pressure plate 34 of the electrode processing device 3, the electrode can be pressed and fixed on the material tray a between laser cutting and powder scraping to keep the electrode flat and improve the accuracy and processing quality of laser processing. In this embodiment, a set of pressure plate guide posts 341 and pressure plate buffer springs 35 are provided at each of the four corners of the electrode pressure plate 34.

[0073] Secondly, the aforementioned conveying device 2 is equipped with a dust collection box 24 at the processing station. The dust collection box 24 is located below the laser 32, and baffles 25 are provided on three sides of the dust collection box 24. The side without baffles provides an opening for the material tray a to enter and exit the dust collection box 24. At the same time, a funnel 26 is provided at the bottom of the dust collection box 24 to draw out the dust. By setting up the dust collection box 24 in conjunction with the electrode pressure plate 34, a relatively closed space can be formed during the cutting and dust scraping process, avoiding dust leakage and flying, which would affect the normal operation of other devices.

[0074] Furthermore, the aforementioned electrode processing device 3 includes a detection bracket 36 located next to the laser mounting frame 33. A photoelectric sensor 37 is mounted on the detection bracket 36, and a baffle 38 that movably passes through the photoelectric sensor 37 is mounted on the side wall of the laser mounting frame 33. Through the cooperation of the photoelectric sensor 37 and the baffle 38, it is possible to accurately detect whether the laser 32 has reached the correct position, so as to provide certain control signals according to the program settings, thereby achieving the purposes of automation and safety control. For example, the laser 32 is only allowed to be started when it descends to the electrode pressing plate 34 to press the material tray a, thus achieving the purpose of safety prevention. In this embodiment, the detection bracket 36 is a Z-axis module; preferably, the electrode 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.

[0075] See Figures 13-15 The present invention provides a heat-sealing liquid injection device 4.

[0076] The aforementioned heat-sealing injection device 4 includes a lifting base 41 capable of Z-axis movement, a pair of opening and closing brackets 42 configurably mounted on both sides above the lifting base 41, a bottom sealing head 43, a side sealing head 44, and a negative pressure suction head 45 sequentially mounted on the opening and closing brackets 42 from bottom to top, and an injection head 46 for injecting electrolyte; the lifting base 41 is provided with an automatically opening and closing clamp 411 for clamping the semi-finished product and exposing its edges for heat sealing, i.e., the width of the clamp 411 (in this embodiment, the width in the Y-axis direction) is [not specified]. The dimensions are smaller than the width of the semi-finished product to expose both sides of the semi-finished product; the bottom sealing head 43 and the side sealing head 44 are both set in pairs, and are used to heat seal the upper and lower bottom edges and the left and right sides of the semi-finished product, respectively. The lower bottom edge is heat sealed before liquid injection and the upper bottom edge is heat sealed after liquid injection. Therefore, only one pair of bottom sealing heads 43 is required. In order to avoid the lifting seat 41 needing to move along the Y-axis, the side sealing heads 44 are designed in two pairs in this embodiment. The negative pressure suction head 45 is used to provide negative pressure to suck up the left and right side walls of the Pock bag so that the upper opening can be opened to facilitate liquid injection. With 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 open and close left and right, the battery edge heat sealing and electrolyte injection can be automatically performed on the semi-finished product after the lifting seat 41 enters between the opening and closing bracket 42. The efficiency is high and the product consistency is good. Moreover, there is no need to flip the semi-finished product during the heat sealing and liquid injection process, which can effectively avoid leakage. The operation is simple and efficient.

[0077] In some embodiments of the heat-sealing injection device 4 described above, the heat-sealing injection device 4 includes a heat-sealing injection bracket 47 that is relatively fixed to the frame of the assembly equipment, and a heat-sealing Z-axis module 48, a heat-sealing X-axis module 49, and an injection X-axis module 410 mounted on the heat-sealing injection bracket 47. The heat-sealing Z-axis module 48 is used to drive the lifting seat 41 to move along 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 injection head 46 is located on the side of the opening and closing bracket 42 and moves in and out of the position above the lifting seat 41 under the drive of the injection 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 mechanism of guide rail, slider, motor, and transmission components; the injection X-axis module 410 is a combination mechanism of guide rail, mounting bracket, and cylinder, and the injection head 46 is mounted on the mounting bracket.

[0078] In some embodiments of the heat-sealing liquid injection device 4 described above, the top surface of the opening and closing bracket 42 is provided with a clearance groove 421 for the liquid injection head 46 to pass through, so that the liquid injection head 46 can enter and exit the opening and closing bracket 42 without performing a lifting action. During liquid injection, the lifting seat 41 does not need to continue to increase its height, making the overall action smoother, simpler, and more efficient.

[0079] In some embodiments of the heat-sealing liquid injection device 4 described above, the heat-sealing liquid injection device 4 includes a waste liquid tank 420 disposed below the moving trajectory of the injection head 46, for containing waste liquid during cleaning of the injection head 46. In this embodiment, the upper surface of the waste liquid tank 420 is a concave curved surface (or conical surface), and an insertion hole 4201 is provided at the center of the curved surface. The injection head 46 is guided by the curved surface into the insertion hole 4201 to achieve a sealing effect and prevent waste liquid leakage.

[0080] In some embodiments of the heat-sealing liquid injection device 4, the heat-sealing liquid injection device 4 includes a coding gun 430 for coding the finished product, generally a QR code. The QR code content includes information such as battery batch number, sequence, electrode weight, foil weight, specific capacity and active material ratio.

[0081] Furthermore, the aforementioned inkjet gun 430 is located at the lower end of the Z-axis trajectory of the lifting seat 41, that is, at the initial position of the lifting seat 41. After the semi-finished product is transformed into a finished product through heat sealing (left and right sides and bottom edge) - liquid injection - heat sealing (top edge), it descends to the position of the inkjet gun 430 for inkjet printing. After inkjet printing, the finished product can be directly taken away by manpower.

[0082] In some embodiments of the heat-sealing liquid injection device 4 described above, the heat-sealing liquid injection device 4 includes an electrolyte container 440, which is connected to the injection head 46 via a hose (not shown in the figure) for supplying electrolyte.

[0083] In this invention, when the movement of parts / components involves precise numerical requirements, sensors can be used for detection and positioning, or higher-precision drive components (such as lead screws, stepper motors, etc.) can be adopted.

[0084] The general usage process of this utility model is as follows:

[0085] Step 1: The self-sealing bags containing a batch of electrode sheets are manually transferred from the transition warehouse to the glove box. The operator uses barcode scanner 8 to scan the QR code on the self-sealing bag and the corresponding material tray a. Then, the electrode sheets are placed into material tray a, and then material tray a is placed into storage device 1 until all the electrode sheets in the self-sealing bag have been processed.

[0086] Step 2: The storage device 1 transfers the material trays a inside it to the conveying device 2 one by one. The conveying device 2 then transfers the material trays a output from the storage device 1 to the inspection station, the processing station, and the unloading station in sequence.

[0087] Step 3: At the inspection station, the electrode sheet is transferred to the CCD camera 6 by the transfer device 5 and real-time surface quality inspection and barcode scanning are performed on the electrode sheet. Then the electrode sheet is placed back onto the material tray a by the transfer device 5.

[0088] Step 4: At the processing station, the electrode processing device 3 uses laser technology to perform cutting and area powder scraping on the electrode.

[0089] Step 5: Conveying device 2 returns material tray a to the inspection station and performs the action of inspecting the quality of electrode processing (i.e., cutting and scraping powder);

[0090] Step 6: At the unloading station, the material tray a and its electrode sheets are manually removed, and the electrode sheets are put into the pre-packaged Pock bag to assemble into a semi-finished symmetrical battery. The semi-finished product is then placed into the heat sealing and liquid injection device 4.

[0091] Step 7: The heat-sealing and electrolyte injection device 4 performs the action of heat-sealing the battery edges and injecting electrolyte to assemble the semi-finished product into a symmetrical battery. Finally, the finished product is taken out of the heat-sealing and electrolyte injection device 4 manually.

[0092] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A heat-sealing liquid injection device for a symmetrical battery assembly equipment, characterized in that: The device includes a lifting base for Z-axis movement, a pair of closable brackets on both sides above the lifting base, a bottom sealing head, a side sealing head, and a negative pressure suction head mounted sequentially from bottom to top on the closable brackets, and an injection head for injecting electrolyte. The lifting base is equipped with an automatically opening and closing clamp for clamping the semi-finished product and exposing its edges for heat sealing. The semi-finished product consists of a Pock bag and its internal electrode sheets. The bottom sealing head and side sealing head are arranged in pairs and are used to heat seal the upper and lower bottom edges and left and right sides of the semi-finished product, respectively. The negative pressure suction head is used to provide negative pressure to suck up the left and right side walls of the Pock bag to open its upper opening for easy electrolyte injection.

2. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 1, characterized in that: The heat-sealing injection device includes a heat-sealing injection bracket, and a heat-sealing Z-axis module, a heat-sealing X-axis module, and an injection X-axis module mounted on the heat-sealing injection bracket. The heat-sealing Z-axis module is used to drive the lifting seat to move along 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 injection head is located on the side of the opening and closing bracket and moves in and out of the position above the lifting seat under the drive of the injection X-axis module.

3. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 2, characterized in that: The top surface of the opening and closing bracket is provided with a clearance groove for the injection head to pass through.

4. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 1, characterized in that: The heat-sealing liquid injection device includes a waste liquid tank located below the movement trajectory of the injection head. The upper surface of the waste liquid tank is a concave curved surface or a conical surface, and an insertion hole is provided at the center of the upper surface of the waste liquid tank.

5. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 1, characterized in that: The heat-sealing liquid injection device includes an inkjet gun.

6. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 5, characterized in that: The inkjet gun is located at the lower end of the Z-axis trajectory of the lifting platform.

7. The heat-sealing liquid injection device of the symmetrical battery assembly equipment as described in claim 1, characterized in that: The heat-sealing injection device includes an electrolyte container, which is connected to the injection head via a hose.

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