Pole piece processing mechanism of symmetrical battery assembly equipment

Abstract

The utility model discloses a pole piece processing mechanism of symmetrical battery assembly equipment, which can automatically scrape powder, turn over and other processing procedures, and comprises a pole piece conveying device, a laser emitting device and an assembly mechanical arm, the pole piece conveying device is used for conveying pole piece sheets and comprises a mold used for bearing the pole piece sheets, a backflow conveying mechanism used for backflow conveying of the mold and a pole piece turnover mechanism. The pole piece turnover mechanism comprises a turnover support arranged on the side edge of the backflow conveying mechanism, a driving device installed on the turnover support, an electromagnet with one end installed on an output shaft of the driving device and a bearing support located on the side, away from the backflow conveying mechanism, of the turnover support. The driving device is used for driving the other end of the electromagnet to overturn between the mold and the bearing bracket in a reciprocating manner; the laser emitting device is opposite to the pole piece conveying device, and is used for cutting a pole piece material into two pole pieces and carrying out regional powder scraping on the two pole pieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to symmetrical battery technical field, especially point to a kind of symmetrical battery assembling equipment's pole piece processing mechanism. BACKGROUND

[0002] With the continuous development of lithium-ion battery (LIBs) technology, in order to meet the growing demand for performance, cost and scalability, especially for large-scale applications such as electric vehicles and grid energy storage, battery commercialization technology is constantly improving, and the development of various battery technologies highlights researchers' efforts in exploring new electrochemical energy storage, such as new electrodes, electrolytes. In order to verify the potential of the electrode in the actual battery, and provide useful feedback for further modification, the electrochemical performance of the electrode must be obtained. The common battery structure currently includes so-called "half-cell", "symmetric cell" and "full-cell" structures, as well as two-electrode or three-electrode structures, which can be used for electrochemical characterization of battery components such as electrode materials and electrolytes in the laboratory.

[0003] Generally speaking, the working electrode in the half-cell is coupled with a reference electrode that maintains a constant potential during the cycle process, one of the electrodes is used as a reference / counter electrode (lithium metal in lithium battery), and the electrode potential curve, electrode reversibility and electrolyte stability are studied. The full-cell is composed of a negative electrode and a positive electrode, both of which are used as working electrodes, and this battery structure is usually used to predict the performance of new battery chemicals, but using different electrodes poses challenges in obtaining electrochemical information of individual electrodes and in battery degradation assessment. The symmetric cell is composed of two identical working electrodes, which is a simplified electrochemical system, especially suitable for electrochemical analysis and degradation diagnosis, and has superior advantages in evaluating some key electrode performance, such as reversibility and ion / electron transport kinetics. This battery configuration is crucial for obtaining the electrochemical properties of the electrode, which helps to verify the potential of the electrode in the actual battery and provide useful feedback for further modification. How to correctly obtain accurate information about electrode characteristics and electrode degradation from symmetric cells is crucial for accelerating the progress of the battery revolution.

[0004] Referring to Figure 12 , the current research on the accessories of the symmetric cell includes two pieces of aluminum plastic film a located at the outermost layer, a limited separator b located between the two pieces of aluminum plastic film a, two pieces of pole piece c symmetrically arranged on both sides of the limited separator b, and two pieces of copper foil e with lug d welded between the two pieces of pole piece c and the adjacent aluminum plastic film a, the lug d positions of the two pieces of copper foil e are different. Currently, it is difficult to make symmetric cells, and it takes a lot of time, especially before assembling the battery, the area of the pole piece needs to be scraped by artificial, and the operation method of artificial scraping is very strict, and the labor intensity is large. SUMMARY

[0005] The purpose of the utility model is to provide a kind of symmetrical battery assembly equipment's pole piece processing mechanism, solve the problems existing in prior art, can automatically scrape powder, overturning etc.

[0006] In order to achieve the above purpose, the utility model's solution is:

[0007] A kind of symmetrical battery assembly equipment's pole piece processing mechanism, including pole piece conveying device, laser emission device and assembly mechanical arm;The pole piece conveying device is used to convey pole piece sheet, it includes the mold for carrying pole piece sheet, the backflow conveying mechanism for backflow conveying the mold, and pole piece overturning mechanism;The pole piece overturning mechanism includes overturning support arranged in the side of the backflow conveying mechanism, drive device installed on the overturning support, electromagnet installed at one end of the drive device output shaft, and carrying support located at the side of the overturning support away from the backflow conveying mechanism;The drive device is used to drive the other end of the electromagnet reciprocating overturning between the mold and the carrying support;The laser emission device is oppositely arranged with the pole piece conveying device, and the pole piece sheet is cut into two pole pieces and the two pole pieces are regionally scraped powder.

[0008] The backflow conveying mechanism includes two pairs of backflow conveying rails arranged in upper and lower for guiding the moving direction of the mold, two pairs of lifting platforms and push-up air cylinders arranged at the two ends of the backflow conveying rails respectively;When the mold moves above the lifting platform, the lifting platform adjusts the height of the mold thereon to realize the alignment of the mold with one backflow conveying rail;Two pairs of backflow conveying rails each correspond to a push-up air cylinder, and the output end of the push-up air cylinder is provided with a push block, and the push block pushes the mold in the corresponding backflow conveying rail to move step by step under the action of the push-up air cylinder.

[0009] The pole piece conveying device is also matched with CCD detection mechanism arranged above the backflow conveying mechanism.

[0010] Preferably, the CCD detection mechanism is located upstream of the laser emission device in the flow direction of the backflow conveying mechanism.

[0011] The carrying support is provided with pole piece slot for placing pole piece.

[0012] The drive device is a stepping motor.

[0013] The pole piece processing mechanism of the symmetrical battery assembly equipment also includes pole piece placing device and transfer mechanical arm arranged upstream of the pole piece processing mechanism;The pole piece placing device is used for batch storage of pole piece sheet with double pole piece size;The transfer mechanical arm is used to transfer pole piece sheet to the pole piece conveying device.

[0014] Preferably, the pole piece placing device comprises two pairs of feeding guide rails with different heights, two pole piece feeders slidingly fitted on the two pairs of feeding guide rails, and a translation motor driving each of the two pole piece feeders, and a synchronous belt driving between the translation motor and the pole piece feeder.

[0015] The pole piece processing mechanism of the symmetrical battery assembling equipment further comprises an aluminum-plastic film feeder, two sets of copper foil feeders, a diaphragm feeder and a battery assembling device arranged downstream of the pole piece processing mechanism; the aluminum-plastic film feeder, the copper foil feeders and the diaphragm feeder are used for batch storing aluminum-plastic film, copper foil with a pole lug and a limited diaphragm respectively, and the ends of the aluminum-plastic film feeder, the two sets of copper foil feeders, the diaphragm feeder and the pole piece conveying device are located around the assembling mechanical arm; the assembling mechanical arm grasps corresponding accessories according to the accessory stacking order of the symmetrical battery and transfers to the battery assembling device to stack to obtain a semi-finished product of the battery.

[0016] Preferably, the battery assembling device comprises a semi-finished product conveying mechanism for adjusting the position and angle of the semi-finished product, a heat sealing machine for heat sealing the semi-finished product, and an electrolyte injection mechanism for adding electrolyte.

[0017] After the above technical scheme is adopted, the symmetrical battery assembling equipment has the following technical effects:

[0018] The symmetrical battery assembling equipment has the following technical effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective view of the symmetrical battery assembling equipment according to the present application; Figure 1 ;

[0020] Figure 2 A perspective view of the symmetrical battery assembling equipment according to the present application; Figure 2 ;

[0021] Figure 3 A top view of the symmetrical battery assembling equipment according to the present application;

[0022] Figure 4 Figure 1 is a perspective view of a polar plate placing device of a symmetrical battery assembling apparatus;

[0023] Figure 5 Figure 2 is a front view of the polar plate placing device of the symmetrical battery assembling apparatus;

[0024] Figure 6 Figure 3 is a perspective view of a polar plate conveying device of a specific embodiment of the present application Figure 1 ;

[0025] Figure 7 Figure 4 is a perspective view of the polar plate conveying device of the specific embodiment of the present application Figure 2 ;

[0026] Figure 8 Figure 5 is a top view of the polar plate conveying device of the specific embodiment of the present application;

[0027] Figure 9 Figure 6 is a perspective view of a battery assembling device of a symmetrical battery assembling apparatus;

[0028] Figure 10 Figure 7 is a front view of the battery assembling device of the symmetrical battery assembling apparatus;

[0029] Figure 11 Figure 8 is a perspective view of a partial structure of the battery assembling device;

[0030] Figure 12 Figure 9 is an exploded view of a symmetrical battery;

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 1-polar plate placing device; 11-feeding guide rail; 12-polar plate feeding tray; 121-polar plate placing groove; 13-translation motor;

[0033] 2-relocation mechanical arm;

[0034] 3-polar plate conveying device; 31-mold; 32-backflow conveying mechanism; 321-backflow conveying guide rail; 322-lifting platform; 323-push-up air cylinder; 324-push block; 33-polar plate overturning mechanism; 331-overturning support; 332-driving device; 333-electromagnet; 334-bearing support; 3341-polar plate groove;

[0035] 4-laser emitting device;

[0036] 5-aluminum plastic film feeding tray;

[0037] 6-copper foil feeding tray;

[0038] 7-septum feeding tray;

[0039] 8-assembling mechanical arm;

[0040] 9 - battery assembling device; 91 - semi-finished product conveying mechanism; 911 - guide rail; 912 - sliding table; 9121 - pivoting seat; 913 - semi-finished product placing table; 914 - overturning seat; 915 - rotating motor; 916 - overturning motor; 917 - guide support; 92 - heat sealing machine; 93 - electrolyte injection mechanism; 931 - container; 932 - supporting arm; 933 - injection head;

[0041] 10 - CCD detection mechanism; 20 - CCD detection mechanism;

[0042] a - aluminum plastic film; b - limited diaphragm; c - pole piece; d - tab; e - copper foil. DETAILED DESCRIPTION

[0043] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0044] Reference Figures 1-3 , 6-8, the utility model discloses a kind of pole piece processing mechanism of symmetrical battery assembling equipment, including pole piece conveying device 3, laser emission device 4 and assembling mechanical arm 8;

[0045] Pole piece conveying device 3 is used to convey pole piece sheet, it includes mould 31 for carrying pole piece sheet, backflow conveying mechanism 32 for backflow conveying mould 31, and pole piece overturning mechanism 33;Pole piece overturning mechanism 33 includes overturning support 331 being arranged in the side of backflow conveying mechanism 32, drive device 332 being installed on overturning support 331, electromagnet 333 being installed in one end of drive device 332 output shaft, and carrying support 334 being located in the side of overturning support 331 deviating from backflow conveying mechanism 32;Drive device 332 is used to drive the other end of electromagnet 333 reciprocating overturning between mould 31 and carrying support 334.

[0046] Laser emission device 4 is oppositely arranged with pole piece conveying device 3, uses high-power laser to cut pole piece sheet into two pole pieces c and carries out regional powder scraping to two pole pieces c.

[0047] Through the cooperation between the pole piece conveying device 3, the laser emitting device 4 and the assembling mechanical arm 8, the pole piece c after being cut can be taken out from the mold 31 by the assembling mechanical arm 8 and placed on the other end of the electromagnet 333 during work, the electromagnet 333 is powered on to adsorb the pole piece c and is driven to rotate by the driving device 332, the pole piece c is turned over by 180 degrees, and the electromagnet 333 is powered off to place the pole piece c on the bearing support 334, and then the two pole pieces c obtained after the pole piece sheet is cut are turned over by 180 degrees by the turnover support 331 for use in the subsequent process, the assembly requirement of the symmetrical battery is met, the assembling mechanical arm 8 does not need to perform the action of turning over the pole piece c, and the assembling mechanical arm 8 does not need to be specially structured or programmed, and the cost is lower.

[0048] The specific embodiments of the utility model are shown below.

[0049] The above-mentioned backflow conveying mechanism 32 includes two pairs of backflow conveying rails 321 arranged above and below for guiding the moving direction of the mold 31, two pairs of lifting tables 322 and push-up cylinders 323 arranged at both ends of the backflow conveying rails 321 respectively; when the mold 31 moves above the lifting table 322, the lifting table 322 adjusts the height of the mold 31 thereon to realize the alignment of the mold 31 with one of the backflow conveying rails 321; each pair of backflow conveying rails 321 corresponds to one push-up cylinder 323, and the output end of the push-up cylinder 323 is provided with a push block 324, and the push block 324 pushes the mold 31 in the corresponding backflow conveying rail 321 to move step by step under the action of the push-up cylinder 323. Through the driving of the push-up cylinder 323, the mold 31 can be moved step by step by a distance of one mold 31 on the backflow conveying rail 321 each time, so that one mold 31 is pushed to the lower side of the laser emitting device 4 each time for laser cutting and powder scraping. It can be predicted that the two ends of the backflow conveying rail 321 are connected with the assembling mechanical arm 8 and the pole piece placing device 1 (see below) respectively; the installation position of the push-up cylinder 323 and the shape of the push block 324 can be adjusted according to the actual installation space.

[0050] The above-mentioned pole piece conveying device 3 is also matched with a CCD detection mechanism 10 arranged above the backflow conveying mechanism 32, the CCD detection mechanism 10 is located upstream of the laser emitting device 4 in the flow direction of the backflow conveying mechanism 32, and is used for real-time pole piece surface quality detection and traceability, timely exclusion of defective products, and ensuring that the pole piece sheet with a better surface can be cut in the subsequent laser cutting process, and the whole pole piece sheet can be traced through software data.

[0051] The above-mentioned bearing support 334 is provided with a pole piece groove 3341 for placing the pole piece c, so as to realize the fixed-point placement of the pole piece c at the preset position, and facilitate the grasping of the assembling mechanical arm 8 in the subsequent process.

[0052] The driving device 332 can be a motor or the like capable of outputting circumferential motion, and is preferably a stepping motor.

[0053] Upstream of the pole piece processing mechanism is a pole piece placing device 1 and a transfer robot arm 2. The pole piece placing device 1 is used to store pole piece sheets with twice the size of the pole piece in batches, specifically, the width of the pole piece sheet is twice the size of the pole piece c, which can be cut into two pole pieces c. The transfer robot arm 2 is used to transfer the pole piece sheet to the pole piece conveying device 3. See Figures 4-5 , which shows the specific structure of the pole piece placing device 1:

[0054] The pole piece placing device 1 includes two pairs of feeding rails 11 with different heights, two pole piece feed trays 12 slidingly fitted on the two pairs of feeding rails 11, and a translation motor 13 driving each of the two pole piece feed trays 12. The translation motor 13 and the pole piece feed tray 12 are connected by a synchronous belt. The pole piece feed tray 12 is provided with a plurality of sheet placing grooves 121 for placing a plurality of pole piece sheets, and the number of pole piece sheets can be customized by batch. By providing two pole piece feed trays 12, one of which can be moved to the position of the transfer robot arm 2 for grabbing while the other is being fed by hand or machine, alternating operation can be achieved without stopping during feeding.

[0055] Downstream of the pole piece processing mechanism is an aluminum-plastic film feed tray 5, two sets of copper foil feed trays 6, a diaphragm feed tray 7, and a battery assembly device 9. The aluminum-plastic film feed tray 5, the copper foil feed tray 6, and the diaphragm feed tray 7 are used to store aluminum-plastic film a, copper foil e with pole lug d, and field limiting diaphragm b in batches, respectively. The aluminum-plastic film feed tray 5, the two sets of copper foil feed trays 6, the diaphragm feed tray 7, and the end of the pole piece conveying device 3 are all located around the assembly robot arm 8. The assembly robot arm 8 grabs the corresponding accessories according to the stacking order of the symmetrical battery accessories and transfers them to the battery assembly device 9 for stacking to obtain a semi-finished product of the battery. The battery assembly device 9 includes a semi-finished product conveying mechanism 91 for adjusting the position and angle of the semi-finished product, a heat sealer 92 for heat sealing the semi-finished product, and an electrolyte injection mechanism 93 for adding electrolyte. See Figures 9-11 , which shows the specific structure of the battery assembly device 9:

[0056] In some embodiments of the battery assembling device 9, the above-mentioned semi-finished product conveying mechanism 91 comprises a guide rail 911 for guiding, a sliding table 912 slidingly fitted on the guide rail 911, and a semi-finished product placing table 913 movably fitted on the sliding table 912, which performs the actions of overturning and horizontal rotation; the above-mentioned heat sealing machine 92 and electrolyte injection mechanism 93 are respectively opposite to the two ends of the guide rail 911. The semi-finished product placing table 913 is driven by the sliding table 912 to move between the heat sealing machine 92 and the electrolyte injection mechanism 93, and in combination with the overturning / rotating actions of the semi-finished product placing table 913, the automatic heat sealing and electrolyte injection of the battery semi-finished product (i.e. the stacked battery components) can be realized, and the assembling is completed.

[0057] Further, the two sides of the above-mentioned sliding table 912 are provided with pivot seats 9121, and a overturning seat 914 is pivotally fitted between the pivot seats 9121, the overturning seat 914 is fixedly provided with a rotating motor 915, the output shaft of the rotating motor 915 upwardly penetrates through the overturning seat 914 and is coaxially connected with the semi-finished product placing table 913; the sliding table 912 is further provided with an overturning motor 916 in transmission connection with the rotating shaft of the overturning seat 914. Through the actions of the rotating motor 915 and the overturning motor 916 or the combination of the actions of the two, the position and / or angle of the semi-finished product can be adjusted, wherein the overturning angle is generally not more than the angle that will cause the semi-finished product to slide off the semi-finished product placing table 913, and only needs to ensure that the electrolyte will not leak out. In the present embodiment, the above-mentioned overturning motor 916 and the rotating shaft of the overturning seat 914 are in transmission connection through a synchronous wheel and a synchronous belt (not shown in the figure).

[0058] Meanwhile, the above-mentioned semi-finished product conveying mechanism 91 further comprises a guide bracket 917 for guiding the moving direction of the semi-finished product placing table 913.

[0059] In some embodiments of the battery assembling device 9, the above-mentioned electrolyte injection mechanism 93 comprises a container 931 for containing electrolyte, a supporting arm 932 located above the guide rail 911, and an injection head 933 installed on the supporting arm 932, the injection head 933 is in communication with the container 931 through a hose (not shown in the figure).

[0060] In some embodiments of the battery assembling device 9, the above-mentioned semi-finished product conveying mechanism 91 is further matched with a CCD detection mechanism 20 arranged above the guide rail 911, which is used for detecting the assembling state of the battery semi-finished product and realizing traceability.

[0061] After the above, the symmetrical battery assembling equipment of the utility model can place each accessory of the symmetrical battery on the pole piece placing device 1, the aluminum plastic film material tray 5, the two sets of copper foil material tray 6 and the diaphragm material tray 7 by manual or mechanical mode, the pole piece sheet material is transferred by the transfer mechanical arm 2, the pole piece conveying device 3 and the laser emitting device 4 are cooperated to realize the cutting and area powder scraping of the pole piece sheet material, the assembling mechanical arm 8 is completed on the semi-finished product conveying mechanism 91 of the battery assembling device 9, and the three edge heat sealing-electrolyte injection-bottom edge heat sealing action is completed by the heat sealing machine 92 and the electrolyte injection mechanism 93, the assembling of the battery is completed, can replace the most actions of manual execution in the prior art and the process can be traced, the automatic assembling of the symmetrical battery is realized, and the production efficiency and consistency are improved.

[0062] When the part / component position movement and the accurate numerical value requirement are involved in the utility model, the sensor can be matched for detection and positioning.

[0063] Taking manual feeding as an example, the general process of the utility model is as follows:

[0064] (1) the pole piece sheet material is sent into the glove box by the transition bin of the equipment by manual;

[0065] (2) the pole piece sheet material in the glove box is placed on the upper and lower pole piece material trays 12 of the pole piece placing device 1 by manual, 12 pole piece sheet materials can be placed on each layer of material tray, and the upper and lower pole piece material trays 12 can be alternately operated without stopping;

[0066] (3) the pole piece sheet material on the pole piece material tray 12 is carried to the mold 31 of the pole piece conveying device 3 by the transfer mechanical arm 2, and the pole piece sheet material is conveyed by the pole piece conveying device 3;

[0067] (4) the laser emitting device 4 adopts a high-power laser to cut and scrape the target area of the pole piece sheet material, and the CCD detection mechanism 10 provides online pole piece detection and tracing, so that the pole piece with a better cutting surface can be ensured when cutting, and the whole pole piece is traced through software data;

[0068] (5) after the cutting of the pole piece sheet material is completed, the pole piece c is turned over by 180 degrees and placed on the bearing support 334 by the pole piece turnover mechanism 33, and the preparation of the two symmetrical pole pieces is completed;

[0069] (6) the aluminum plastic film a, the limited diaphragm b and the two symmetrical copper foils e with the pole lug d all adopt the fixed material tray mode, and the accessories are placed on the corresponding material tray by manual;

[0070] (7) the assembling mechanical arm 8 is a four-axis mechanical hand, which stacks and assembles the accessories layer by layer to obtain the battery semi-finished product;

[0071] (8) The battery assembling device 9 firstly seals the three edges of the battery semi-product upward and downward, then turns the battery which lies flat by a certain angle through the semi-product conveying mechanism 91, and then injects electrolyte, and finally seals the last edge after the injection is completed. After the whole sealing is completed, the battery is conveyed to the code spraying area through the conveying module for code spraying.

[0072] The above embodiments and drawings are not limited to the product shape and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A pole piece processing mechanism of a symmetrical battery assembling device, characterized in that: it comprises a pole piece conveying device, a laser emitting device and an assembling robot arm; the pole piece conveying device is used for conveying a pole piece sheet, and comprises a mold for carrying the pole piece sheet, a reflow conveying mechanism for reflow conveying the mold, and a pole piece turnover mechanism; the pole piece turnover mechanism comprises a turnover support arranged at a side edge of the reflow conveying mechanism, a driving device installed on the turnover support, an electromagnet installed at one end of an output shaft of the driving device, and a carrying support located at a side of the turnover support away from the reflow conveying mechanism; the driving device is used for driving the other end of the electromagnet to reciprocate and turn over between the mold and the carrying support; and the laser emitting device is arranged opposite to the pole piece conveying device, and is used for cutting the pole piece sheet into two pole pieces and scraping powder on the two pole pieces.

2. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 1, characterized in that: the reflow conveying mechanism comprises two pairs of reflow conveying rails arranged in an up-down manner and used for guiding a moving direction of the mold, and two pairs of lifting tables and push-up cylinders arranged at two ends of the reflow conveying rails respectively; when the mold moves above the lifting tables, the lifting tables adjust a height of the mold thereon to realize alignment of the mold with one of the reflow conveying rails; each pair of the reflow conveying rails corresponds to one push-up cylinder, and an output end of the push-up cylinder is provided with a push block which pushes the mold in the corresponding reflow conveying rail to move step by step under action of the push-up cylinder.

3. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 1, characterized in that: the pole piece conveying device is further provided with a CCD detection mechanism arranged above the reflow conveying mechanism.

4. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 3, characterized in that: the CCD detection mechanism is located upstream of the laser emitting device in a flow direction of the reflow conveying mechanism.

5. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 1, characterized in that: the carrying support is provided with a pole piece groove for placing the pole piece.

6. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 1, characterized in that: the driving device is a stepping motor.

7. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 1, characterized in that: it further comprises a pole piece placing device arranged upstream of the pole piece processing mechanism and a transfer robot arm; the pole piece placing device is used for batch placing a pole piece sheet with a size of two times of a pole piece; and the transfer robot arm is used for transferring the pole piece sheet to the pole piece conveying device.

8. The pole piece processing mechanism of the symmetrical battery assembling device according to claim 7, characterized in that: the pole piece placing device comprises two pairs of feeding rails with different heights, two pole piece feeders respectively slidingly fitted in the two pairs of feeding rails, and two pole piece feeders respectively driven by one translation motor; transmission is performed between the translation motor and the pole piece feeders through a synchronous belt; and a plurality of sheet placing grooves are arranged on the pole piece feeders. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. The electrode sheet processing mechanism of the symmetrical battery assembling equipment according to claim 1, characterized in that: Further comprising an aluminum-plastic film material tray, two sets of copper foil material trays, a diaphragm material tray and a battery assembling device arranged downstream of the electrode sheet processing mechanism; the aluminum-plastic film material tray, the copper foil material trays and the diaphragm material tray are respectively used for batch storage of aluminum-plastic film, copper foil with tabs and field limiting diaphragm, and the ends of the aluminum-plastic film material tray, the two sets of copper foil material trays, the diaphragm material tray and the electrode sheet conveying device are all located around the assembling mechanical arm; the assembling mechanical arm grasps corresponding components according to the stacking order of the components of the symmetrical battery, and transfers to the battery assembling device for stacking to obtain a semi-finished product of the battery.

10. The electrode sheet processing mechanism of the symmetrical battery assembling equipment according to claim 9, characterized in that: The battery assembling device comprises a semi-finished product conveying mechanism for adjusting the position and angle of the semi-finished product, a heat sealing machine for heat sealing the semi-finished product, and an electrolyte injection mechanism for adding electrolyte.

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