Battery assembling device of symmetrical battery assembling equipment

Abstract

The utility model discloses a battery assembly device of symmetrical battery assembly equipment, which can realize the assembly procedures of automatic sealing, liquid injection and the like of symmetrical batteries. The battery assembling device comprises a semi-finished product conveying mechanism for adjusting the position and angle of a semi-finished product, a heat sealing machine for heat-sealing the semi-finished product, and an electrolyte injection mechanism for adding electrolyte; the semi-finished product conveying mechanism comprises a guide rail, a sliding table and a semi-finished product placing table; the sliding table is in sliding fit with the guide rail; the semi-finished product placing table is movably matched with the sliding table; the semi-finished product placing table executes the actions of overturning and horizontally rotating; the heat sealing machine and the electrolyte injection mechanism are opposite to the two ends of the guide rail respectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to symmetrical battery technical field, especially point to a kind of symmetrical battery assembling equipment's battery assembling device. 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, the commercialization of battery technology is constantly improving, and the development of various battery technologies highlights the efforts of researchers 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, in which one electrode is used as a reference / counter electrode (lithium metal in lithium batteries), 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. 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 cell is crucial for accelerating the progress of battery. Currently, it is difficult to make symmetric cell, time-consuming, especially manual powder scraping requires strict operation skills and high labor intensity.

[0004] Reference Figure 12The accessories of the symmetrical battery researched at present stage include two aluminum plastic films a located at the outermost layer, a limited separator b located between the two aluminum plastic films a, two polar pieces c symmetrically arranged on the two sides of the limited separator b, and two copper foils e with tabs d welded between the two polar pieces c and the adjacent aluminum plastic films a, and the tabs d of the two copper foils e are different in position. The process of battery assembly is as follows: first, the accessories of the battery are stacked layer by layer (the limited separator b and the two polar pieces c need to be added with electrolyte), the tabs d are exposed from the aluminum plastic films a and covered by the two aluminum plastic films a and other accessories, then the three edges of the two aluminum plastic films a are heat sealed, the bottom edge is left open for supplementing electrolyte, and finally the heat sealing of the bottom edge is performed to complete the assembly. In the prior art, the symmetrical battery can only be assembled manually in a glove box, the production efficiency is low, and the consistency of parallel samples cannot be guaranteed, which greatly affects data research. Practical new type content

[0005] The purpose of the present application is to provide a battery assembly device of a symmetrical battery assembly equipment, which solves the problems in the prior art and can realize automatic sealing, liquid injection and other assembly processes of the symmetrical battery.

[0006] In order to achieve the above purpose, the solution of the present application is as follows:

[0007] A battery assembly device of a symmetrical battery assembly equipment, comprising a semi-finished product conveying mechanism for adjusting the position and angle of a semi-finished product, a heat sealer for heat sealing the semi-finished product, and an electrolyte injection mechanism for adding electrolyte; the semi-finished product conveying mechanism comprises a guide rail, a sliding table slidingly fitted on the guide rail, and a semi-finished product placing table movably fitted on the sliding table, and the semi-finished product placing table performs overturning and horizontal rotating actions; the heat sealer and the electrolyte injection mechanism are respectively opposite to the two ends of the guide rail.

[0008] Pivot connection seats are arranged on the two sides of the sliding table, overturning seats are pivotally connected between the pivot connection seats, a rotating motor is fixed in the overturning seat, and an output shaft of the rotating motor upwardly penetrates the overturning seat and is coaxially connected with the semi-finished product placing table; an overturning motor is installed on the sliding table and is in transmission connection with the rotating shaft of the overturning seat.

[0009] Preferably, the overturning motor and the rotating shaft of the overturning seat are in transmission connection through a synchronous wheel and a synchronous belt.

[0010] The semi-finished product conveying mechanism further comprises a guide support for guiding the moving direction of the semi-finished product placing table.

[0011] The electrolyte injection mechanism comprises a container for containing electrolyte, a support arm located above the guide rail, and an injection head installed on the support arm, and the injection head is in communication with the container.

[0012] The semi-finished product conveying mechanism is further provided with a CCD detection mechanism arranged above the guide rail.

[0013] The battery assembling device is provided with a pole piece placing device, a transfer mechanical arm, a pole piece conveying device, a laser emitting device, an aluminum plastic film material disc, two sets of copper foil material discs, a diaphragm material disc and an assembling mechanical arm upstream.

[0014] After the technical scheme is applied, the battery assembling device has the following technical effects:

[0015] The semi-finished product placing table is driven by the sliding table to move between the heat sealing machine and the electrolyte injection mechanism, and the overturning / rotating action of the semi-finished product placing table can realize automatic heat sealing and electrolyte injection on the battery semi-finished product (i.e. stacked battery accessories), complete assembly, replace most actions performed by manual operation in the prior art, realize automatic assembly of symmetrical batteries, and improve production efficiency and consistency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the symmetrical battery assembling equipment applied with the battery assembling device of the utility model; Figure 1 ;

[0017] Figure 2 is a perspective view of the symmetrical battery assembling equipment applied with the battery assembling device of the utility model; Figure 2 ;

[0018] Figure 3 is a top view of the symmetrical battery assembling equipment applied with the battery assembling device of the utility model;

[0019] Figure 4 is a perspective view of the pole piece placing device of the symmetrical battery assembling equipment;

[0020] Figure 5 is a front view of the pole piece placing device of the symmetrical battery assembling equipment;

[0021] Figure 6 is a perspective view of the pole piece conveying device of the symmetrical battery assembling equipment; Figure 1 ;

[0022] Figure 7 is a perspective view of the pole piece conveying device of the symmetrical battery assembling equipment; Figure 2 ;

[0023] Figure 8 is a top view of the pole piece conveying device of the symmetrical battery assembling equipment;

[0024] Figure 9 is a perspective view of the battery assembling device of the utility model specific embodiment;

[0025] Figure 10Battery assembly device main view of the embodiment of the utility model;

[0026] Figure 11 Battery assembly device part structure perspective view;

[0027] Figure 12 Symmetrical battery exploded view;

[0028] Explanation of reference numerals:

[0029] 1-pole piece placing device, 11-feeding guide rail, 12-pole piece material tray, 121-sheet placing groove, 13-translation motor;

[0030] 2-relocation mechanical arm;

[0031] 3-pole piece 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-pole piece turnover mechanism, 331-turnover support, 332-driving device, 333-electromagnet, 334-bearing support, 3341-pole piece groove;

[0032] 4-laser emitting device;

[0033] 5-aluminum plastic film material tray;

[0034] 6-copper foil material tray;

[0035] 7-septum material tray;

[0036] 8-assembly mechanical arm;

[0037] 9-battery assembly device, 91-semi-finished product conveying mechanism, 911-guiding guide rail, 912-sliding table, 9121-pivot connection seat, 913-semi-finished product placing table, 914-turnover seat, 915-rotation motor, 916-turnover motor, 917-guiding support, 92-heat sealing machine, 93-electrolyte injection mechanism, 931-container, 932-branch arm, 933-injection head;

[0038] 10-CCD detection mechanism;

[0039] 20-CCD detection mechanism;

[0040] a-aluminum plastic film, b-limited septum, c-pole piece, d-tab, e-copper foil. DETAILED DESCRIPTION

[0041] In order to further explain the technical scheme of the utility model, the utility model will be described in detail through specific embodiments.

[0042] Reference Figures 1-3, 9-11, the utility model discloses a kind of battery assembly device of symmetrical battery assembly equipment 9, including the half-finished product conveying mechanism 91 for adjusting the position and angle of half-finished product, the heat sealing machine 92 for heat sealing half-finished product, and the electrolyte injection mechanism 93 for adding electrolyte;

[0043] The half-finished product conveying mechanism 91 includes a guide rail 911, a sliding table 912 slidingly fitted on the guide rail 911, and a half-finished product placement table 913 movably fitted on the sliding table 912.

[0044] The heat sealing machine 92 and the electrolyte injection mechanism 93 are respectively opposite to the two ends of the guide rail 911.

[0045] Through the above scheme, the utility model can realize automatic heat sealing and electrolyte injection for the battery half-finished product (i.e., the stacked battery accessories) by moving the half-finished product placement table 913 between the heat sealing machine 92 and the electrolyte injection mechanism 93 and cooperating with the overturning / rotating action of the half-finished product placement table 913, and complete assembly, which can replace most actions performed manually in the prior art, realize automatic assembly of symmetrical batteries, and improve production efficiency and consistency.

[0046] The following shows a specific embodiment of the utility model.

[0047] The two sides of the above-mentioned sliding table 912 are provided with pivot seats 9121, the pivot seats 9121 are pivotally connected with an overturning seat 914, the overturning seat 914 is fixedly connected with a rotating motor 915, the output shaft of the rotating motor 915 passes through the overturning seat 914 upward and is coaxially connected with the half-finished product placement table 913, and a overturning motor 916 is also installed on the sliding table 912 and is in transmission connection with the rotating shaft of the overturning seat 914. Through the automatic action 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 half-finished product can be adjusted, and the overturning angle is generally not more than the angle that can cause the half-finished product to slide off the half-finished product placement table 913, and only needs to ensure that the electrolyte does not leak out.

[0048] Further, 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).

[0049] The above-mentioned half-finished product conveying mechanism 91 further includes a guide bracket 917 for guiding the moving direction of the half-finished product placement table 913.

[0050] The above-mentioned electrolyte injection mechanism 93 includes 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, and the injection head 933 is in communication with the container 931 through a hose (not shown in the figure).

[0051] The semi-finished product conveying mechanism 91 is also matched with a CCD detection mechanism 20 arranged above the guide rail 911, which is used to detect the assembly state of the battery semi-finished product and realize traceability.

[0052] In the battery assembly device, the upstream of the battery assembly device is provided with a pole piece placing device 1, a transfer mechanical arm 2, a pole piece conveying device 3, a laser emitting device 4, an aluminum plastic film material disc 5, two sets of copper foil material discs 6, a diaphragm material disc 7 and an assembly mechanical arm 8; the pole piece placing device 1 is used for batch storage of pole piece sheets with a size of two times of a pole piece c, specifically, the width of the pole piece sheet is two times of the pole piece c, and the pole piece sheet can be cut into two pole pieces c; the transfer mechanical arm 2 is used for transferring the pole piece sheet to the pole piece conveying device 3; the pole piece conveying device 3 is used for conveying the pole piece sheet; the laser emitting device 4 is arranged opposite to the pole piece conveying device 3, a high-power laser is used to cut the pole piece sheet into two pole pieces c and to scrape powder in the regions of the two pole pieces c; the aluminum plastic film material disc 5, the copper foil material disc 6 and the diaphragm material disc 7 are respectively used for batch storage of aluminum plastic films a, copper foils e with pole ears d and limited diaphragms b, and the ends of the aluminum plastic film material disc 5, the two sets of copper foil material discs 6, the diaphragm material disc 7 and the pole piece conveying device 3 are all located around the assembly mechanical arm 8; the assembly mechanical arm 8 grasps corresponding accessories according to the accessory stacking order of a symmetrical battery, and is transferred to a battery assembly device 9 to be stacked to obtain a semi-finished product of the battery. Therefore, workers only need to place accessories on corresponding material discs in the glove box, and subsequent pole piece cutting, powder scraping and assembly processes are all automatically completed by the equipment.

[0053] Referring to Figures 4-5 The specific structure of the pole piece placing device 1 is as follows:

[0054] The pole piece placing device 1 includes two pairs of feeding rails 11 with different heights, two pole piece material discs 12 slidingly fitted on the two pairs of feeding rails 11, and one translation motor 13 driving each of the two pole piece material discs 12, and the translation motor 13 and the pole piece material disc 12 being in transmission through a synchronous belt. A plurality of sheet placing grooves 121 are arranged on the pole piece material disc 12, and a plurality of pole piece sheets can be batch placed in the sheet placing grooves 121, and the number of the pole piece sheets can be customized according to batches. By arranging two pole piece material discs 12, one of the pole piece material discs 12 can be moved to the position of the transfer mechanical arm 2 for grasping while the other pole piece material disc 12 is loaded by manual or mechanical operation, so that the alternate operation is realized, and the loading does not need to stop.

[0055] Referring to Figures 6-8 The specific structure of the pole piece conveying device 3 is as follows:

[0056] The pole piece conveying device 3 comprises a mold 31 for carrying the pole piece sheet, a reflow conveying mechanism 32 for conveying the mold 31 in reflow, and a pole piece turnover mechanism 33; the pole piece turnover mechanism 33 comprises a turnover support 331 arranged at the side of the reflow conveying mechanism 32, a driving device 332 installed on the turnover support 331, an electromagnet 333 installed at one end of the output shaft of the driving device 332, and a carrying support 334 located at the side of the turnover support 331 away from the reflow conveying mechanism 32; the assembly mechanical arm 8 performs the action of taking out the cut pole piece c from the mold 31 and placing it on the other end of the electromagnet 333, the electromagnet 333 is energized to adsorb the pole piece c and is driven by the driving device 332 to rotate, the pole piece c is turned over by 180°, and the electromagnet 333 is de-energized to place the pole piece c on the carrying support 334. The pole piece sheet is cut into two pieces, one of which is turned over by 180° for use in the subsequent process, meeting the assembly requirement of symmetrical batteries, so that the assembly mechanical arm 8 itself does not need to perform the action of turning over the pole piece c, and the assembly mechanical arm 8 does not need special structure or program design, which is lower in cost.

[0057] Further, the reflow conveying mechanism 32 comprises two pairs of reflow conveying rails 321 arranged upward and downward 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 reflow conveying rails 321 respectively; the lifting table 322 is used to adjust the height of the mold 31 thereon to realize alignment with one of the reflow conveying rails 321; each of the two pairs of reflow 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, which pushes the mold 31 in the corresponding reflow 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 reflow 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 reflow conveying rail 321 are connected with the pole piece placing device 1 and the assembly mechanical arm 8 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.

[0058] Meanwhile, the pole piece conveying device 3 is also matched with a CCD detection mechanism 10 arranged above the reflow conveying mechanism 32, which is located upstream of the laser emitting device 4 in the flow direction of the reflow 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 better surface can be cut in the subsequent laser cutting, and the whole pole piece sheet can be traced through software data.

[0059] Secondly, the above-mentioned bearing support 334 is provided with a tab slot 3341 for placing the tab c, so as to realize the tab c being placed at the preset position, and facilitate the subsequent process of the assembly mechanical arm 8.

[0060] In addition, the above-mentioned driving device 332 can be a motor or the like capable of outputting circumferential motion, and is preferably a stepping motor.

[0061] The above-mentioned battery assembly device 9 and the battery assembly equipment applying the same can be equipped with sensors for detection and positioning when the parts / components are required to be moved with precise numerical values.

[0062] Taking manual feeding as an example, the general working process of the battery assembly equipment is as follows:

[0063] (1) The tab sheet is manually fed into the glove box through the transition bin of the equipment;

[0064] (2) The tab sheet in the glove box is placed on the upper and lower tab trays 12 of the tab placing device 1 by the worker, and 12 tab sheets can be placed on each tray. The upper and lower tab trays 12 can be operated alternately without stopping;

[0065] (3) The tab sheet on the tab tray 12 is transported to the mold 31 of the tab conveying device 3 by the transfer mechanical arm 2, and the tab sheet is conveyed by the tab conveying device 3;

[0066] (4) The target area of the tab sheet is cut and powder is scraped by the laser emitter 4 using a high-power laser, and online tab detection and tracing are provided by the CCD detection mechanism 10, so as to ensure that the tab with a good cutting surface is cut by the laser, and the whole tab is traced by software data;

[0067] (5) After the cutting of the tab sheet is completed, the tab c is turned over by 180° by the tab turnover mechanism 33 and placed on the bearing support 334, so that the two symmetrical tabs are prepared;

[0068] (6) The aluminum plastic film a, the limited diaphragm b, and the two symmetrical copper foils e with tabs d are all in the fixed tray mode, and the above-mentioned accessories are placed on the corresponding trays by the worker;

[0069] (7) The assembly mechanical arm 8 is a four-axis mechanical hand, which stacks and assembles the accessories layer by layer to obtain a battery semi-finished product;

[0070] (8) The battery assembly device 9 first performs upper and lower heat sealing on three edges of the battery semi-finished product, then turns the flat battery by a certain angle through the semi-finished product conveying mechanism 91 to perform electrolyte injection, and then performs heat sealing on the last edge after the injection is completed. After all the heat sealing is completed, the battery is conveyed to the code spraying area for code spraying.

[0071] The above embodiments and drawings are not intended to limit the product form and style of the present application, and any appropriate changes or modifications made by those skilled in the art shall be considered as not departing from the patent scope of the present application.

Claims

1. A battery assembling device of a symmetrical battery assembling apparatus, characterized in that: it comprises a semi-finished product conveying mechanism for adjusting the position and angle of a semi-finished product, a heat sealing machine for heat sealing the semi-finished product, and an electrolyte injection mechanism for adding electrolyte; the semi-finished product conveying mechanism comprises a guide rail, a sliding table slidingly fitted on the guide rail, and a semi-finished product placing table movably fitted on the sliding table, the semi-finished product placing table performing overturning and horizontal rotating actions; and the heat sealing machine and the electrolyte injection mechanism are respectively opposite to two ends of the guide rail.

2. The battery assembling device of the symmetrical battery assembling apparatus according to claim 1, characterized in that: both sides of the sliding table are provided with pivot seats, the pivot seats are pivotally connected with an overturning seat, a rotating motor is fixed in the overturning seat, an output shaft of the rotating motor passes through the overturning seat upward and is coaxially connected with the semi-finished product placing table, and an overturning motor is installed on the sliding table and is in transmission connection with a rotating shaft of the overturning seat.

3. The battery assembling device of the symmetrical battery assembling apparatus according to claim 2, characterized in that: the overturning motor and the rotating shaft of the overturning seat are in transmission connection through a synchronous wheel and a synchronous belt.

4. The battery assembling device of the symmetrical battery assembling apparatus according to claim 1, characterized in that: the semi-finished product conveying mechanism further comprises a guide support for guiding the moving direction of the semi-finished product placing table.

5. The battery assembling device of the symmetrical battery assembling apparatus according to claim 1, characterized in that: the electrolyte injection mechanism comprises a container for containing electrolyte, a supporting arm above the guide rail, and an injection head installed on the supporting arm, the injection head being in communication with the container.

6. The battery assembling device of the symmetrical battery assembling apparatus according to claim 1, characterized in that: the semi-finished product conveying mechanism is further matched with a CCD detection mechanism arranged above the guide rail.

7. The battery assembling device of the symmetrical battery assembling apparatus according to claim 1, characterized in that: an upstream of the battery assembling device is provided with an electrode sheet placing device, a transfer mechanical arm, an electrode sheet conveying device, a laser emitting device, an aluminum plastic film material disc, two sets of copper foil material discs, a diaphragm material disc, and an assembling mechanical arm. ​ ​ ​ ​ ​ ​ ​ ​ ​

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