All-solid-state battery lamination pressing equipment

Abstract

The utility model discloses all-solid-state battery lamination pressing equipment which comprises a pressing mechanism, a lamination table and a lamination guide seat, the pressing mechanism comprises a base, a pressing part and a driving structure, the base and the pressing part are oppositely arranged, and the driving structure is used for driving the base and the pressing part to be close to each other and away from each other; the lamination table is detachably arranged on the base, the lamination table is provided with a lamination positioning groove and a third positioning part, and the lamination positioning groove and the pressing part are oppositely arranged; and the lamination guide seat is provided with a lamination positioning opening and a fourth positioning part which is detachably positioned and matched with the third positioning part, so that the lamination positioning opening is relatively sleeved with the lamination positioning groove. An electrolytic layer of a battery cell is positioned and placed through the lamination positioning groove, and a pole piece is placed through the lamination guide seat, so that a positioning effect on the pole piece is achieved, the positioning precision is improved, and a relatively good lamination effect is further achieved. And when the battery cells are laminated, the battery cells are compressed after being stacked, and the battery cells do not need to be transferred to other equipment to be compressed after being laminated.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to a full-solid-state battery stack pressing device. Background Art

[0002] With current technology, the electrolyte of all-solid-state batteries does not have good bending capabilities and cannot be stacked in a Z-shaped stacking method. The stacking method commonly used in laboratories is manual stacking without an accurate positioning mold.

[0003] After the battery cells are stacked, they need to be transferred to the compacting equipment for compaction. During the transfer process, secondary dislocation or electrode scattering is prone to occur. Utility Model Content

[0004] The utility model aims to provide an all-solid-state battery stack pressing device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] The utility model provides an all-solid-state battery stack pressing device, including a pressing mechanism, a stacking platform, and a stacking guide seat, the pressing mechanism including a base, a pressing part and a driving structure, the base and the pressing part are arranged relative to each other, and the driving structure is used to drive the base and the pressing part to approach and move away from each other; the stacking platform is detachably arranged on the base, the stacking platform is provided with a stack positioning groove and a third positioning part, and the stack positioning groove is arranged relative to the pressing part; the stacking guide seat is provided with a stack positioning port, and the stacking guide seat is provided with a fourth positioning part that is detachably positioned and matched with the third positioning part, so that the stack positioning port and the stack positioning groove are relatively fitted.

[0007] The beneficial effects of the utility model are:

[0008] The battery cells of the battery cells are positioned and placed through the stacking positioning grooves, and the battery cells are placed through the stacking guide seat, which plays a role in positioning the battery cells, improves the positioning accuracy, and thus plays a better role in stacking. While stacking, the clamping mechanism presses down, and while completing the battery cell stacking, it plays a role in compressing the battery cells after stacking. After the stacking is completed, there is no need to transfer to other equipment to perform the clamping operation on the battery cells. In addition, the stacking guide seat is provided with a fourth positioning part, which is detachably positioned and matched with the third positioning part, and also ensures the accurate positioning of the stacking guide seat.

[0009] As a further improvement of the above technical solution, the bottom of the stack positioning groove is detachably provided with a bottom support sheet, the top surface of the bottom support sheet is provided with a second step, and the inner peripheral wall of the stack positioning groove is provided with a first step. When taking out the stack, the bottom support sheet and the stack can be taken out together, which is convenient for taking out the stack.

[0010] As a further improvement of the above technical solution, the stack positioning groove is provided with a third step, and the bottom support sheet is positioned and clamped on the third step to further improve the positioning accuracy.

[0011] As a further improvement of the above technical solution, the base is provided with a guide limit portion, the guide limit portion is provided with a guide groove, and the stacking table is inserted into the guide groove, which is simple and convenient to install.

[0012] As a further improvement of the above technical solution, a positioning and fixing structure for positioning and fixing the stacking table is provided between the guide limit portion and the stacking table, which facilitates the positioning and fixing of the stacking table and ensures that the clamping portion can accurately clamp the battery cell body.

[0013] As a further improvement of the above technical solution, a pressure sensor is provided between the bottom of the lamination table and the base to measure the pressing force on the battery cell in real time.

[0014] As a further improvement of the above technical solution, a heating device is further included, which is used to heat the stacking table. The heating device is embedded in the bottom plate of the stacking table to heat the stacked poles or electrolytes to remove moisture and promote bonding during the stacking and pressing of the battery cells.

[0015] As a further improvement of the above technical solution, the clamping mechanism includes a clamping frame and a screw module arranged on the clamping frame, the clamping part is arranged at one end of the screw module close to the stacking positioning groove, and the screw module is provided with a rotating part.

[0016] As a further improvement of the above technical solution, the clamping frame is slidably provided with a sliding plate, and a pressure head is provided at one end of the sliding plate close to the stack positioning groove. The sliding plate is movably connected to the clamping part, and the pressure is transmitted to the battery cell through the sliding plate, so that the battery cell is evenly pressurized.

[0017] As a further improvement of the above technical solution, the clamping frame is provided with a guide column, the sliding plate is slidably sleeved on the guide column, and a sliding bearing is provided between the guide column and the sliding plate to improve the sliding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 This is a structural schematic diagram of an embodiment of an all-solid-state battery stack pressing device provided by the utility model, wherein six arrows represent forward, backward, left, right, upward and downward directions respectively;

[0020] Figure 2This is a structural schematic diagram of an embodiment of an all-solid-state battery stack pressing device provided by the utility model;

[0021] Figure 3 This is a structural schematic diagram of a stacking table and a negative electrode stacking guide seat of an all-solid-state battery stacking pressing device provided by the utility model;

[0022] Figure 4 This is a structural schematic diagram of a stacking table and a negative electrode stacking guide seat of an all-solid-state battery stacking pressing device provided by the utility model;

[0023] Figure 5 The utility model provides an all-solid-state battery stack pressing device, and a cross-sectional view of a stacking table and a negative electrode stack guide seat in one embodiment thereof.

[0024] Reference numerals:

[0025] Base 100, bottom plate 110, guide limit part 120, guide groove 130, clamping mechanism 200, guide column 210, mounting plate 220, sliding plate 230, connecting groove 231, rib 232, screw module 240, rotating rod 241, pressing block 242, negative electrode stacking guide seat 300, negative electrode stacking positioning opening 310, positive electrode stacking guide seat 400, positive electrode stacking positioning opening 410, boss 420, stacking platform 500, stacking positioning groove 510, first step 511, second step 512, third step 513, bottom support plate 520, card slot 530, heating device 600, magnetic positioning piece 700. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood to exclude the number, and above, below, within, etc. are understood to include the number.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 5 The utility model provides a full solid-state battery stack pressing device and makes the following embodiments:

[0031] In some embodiments, an all-solid-state battery stack pressing device includes a pressing mechanism 200, a stacking platform 500, and a stacking guide seat. The stacking guide seats are divided into two types, namely, a negative stacking guide seat 300 and a positive stacking guide seat 400. Correspondingly, the stacking positioning openings are respectively a negative stacking positioning opening 310 and a positive stacking positioning opening 410. Those skilled in the art can also set stacking positioning openings of different shapes according to the needs of the stacking type to stack multiple types of stackings.

[0032] The clamping mechanism 200 includes a base 100, a clamping part and a driving structure. The base 100 and the clamping part are arranged opposite to each other in an upper and lower direction. The driving structure is used to drive the clamping part to move up and down and press against the base 100. In some other embodiments, the driving structure can also drive the base 100 to move toward the clamping part to thereby clamp the laminate.

[0033] The base 100, as a fixed base, integrates other devices together. The upper surface of the base 100 is provided with a bottom plate 110, and the bottom plate 110 is provided with a guide limiter 120. The guide limiter 120 is provided with a guide groove 130 with an opening facing the front side, that is, the front of the guide groove 130 is provided with a notch for the stacking platform 500 to be inserted. The stacking platform 500 is inserted into the guide groove 130 along the front-to-back direction, which is simple and convenient to install. The use of a detachable stacking platform 500 facilitates the placement of the electrode and the electrolyte; the left and right inner groove walls of the guide groove 130 are provided with a fixing groove that is clamped with the edge of the stacking platform 500, which further plays a guiding and positioning role. In some other embodiments, the stacking platform 500 can also be fixed to the bottom plate 110 by a threaded connection.

[0034] A heating device 600 is also provided on the upper surface of the bottom plate 110. The bottom plate 110 below the stacking table 500 is embedded with the heating device 600. The heating device 600 is provided between the bottom plate 110 and the stacking table 500. During the stacking and pressing process of the battery cells, the stacked poles or electrolytes are heated to remove moisture and promote bonding. The heating device 600 can also be detachably provided on the bottom plate 110 in a manner similar to the arrangement of the stacking table 500, so as to facilitate replacement and maintenance of the heating device 600.

[0035] The heating device 600 specifically includes electric heating wires, PTC ceramic heating sheets, tubular electric heating elements, etc. These elements are usually wound with high-resistance alloy wires, and generate heat when powered on to play a heating role. A pressure sensor is provided at the bottom of the stacking table 500 to measure the pressing force on the battery cell in real time.

[0036] Reference Figure 5 The stacking platform 500 is provided with a stacking positioning groove 510, and the stacking positioning groove 510 is provided with a third step 513. The bottom support sheet 520 is positioned and clamped on the third step 513, so that the bottom support sheet 520 can be detachably arranged in the stacking positioning groove 510. When taking out the stacking sheets, the stacking sheets and the bottom support sheet 520 can be taken out together.

[0037] The bottom support sheet 520 is provided with a second step 512 for placing the negative electrode sheet, and the bottom support sheet 520 and the stacking positioning groove 510 form a first step 511 for placing the electrolyte layer, which plays a role in positioning the electrode sheet, improves the positioning accuracy, and thus plays a better role in stacking.

[0038] The stacking platform 500 is provided with a third positioning portion, and the negative electrode stacking guide seat 300 or the positive electrode stacking guide seat 400 is provided with a fourth positioning portion that is detachably positioned and matched with the third positioning portion. In the present embodiment, the third positioning portion is a slot 530 provided on the two side walls of the stacking positioning groove 510, and the fourth positioning portion is a boss 420 that is engaged with the slot 530. In some other embodiments, the third positioning portion may be a plurality of positioning holes, and the fourth positioning portion may be a plurality of positioning columns that match the positioning holes one by one.

[0039] When in use, when stacking positive electrode sheets, the positive electrode stacking guide seat 400 is placed on the stacking platform 500 and the clamping groove 530 is clamped with the boss 420. After stacking, the positive electrode stacking guide seat 400 is removed. Similarly, when stacking negative electrode sheets, the negative electrode stacking guide seat 300 is placed on the stacking platform 500 and clamped with the third positioning portion. After stacking, the negative electrode stacking guide seat 300 is removed. This cycle is repeated until the specified number of layers is reached and the stacking is completed. The pole sheets are limited by the steps of different profiling molds, which effectively avoids position deviations caused by the stacking process.

[0040] In order to enable the clamping part to accurately clamp the battery cell body, a positioning and fixing structure is provided on the side of the guide groove 130 opposite to the notch, which is convenient for positioning and fixing the stacking table 500, and ensures that the clamping part can accurately clamp the battery cell body. The positioning and fixing structure includes a magnetic positioning member 700, which is convenient for positioning and fixing the stacking table 500, and ensures that the pressure block 242 can accurately clamp the battery cell body. The magnetic positioning member 700 includes a first magnetic member and a second magnetic member. The first magnetic member is arranged on the stacking table 500, and the second magnetic member is arranged on the rear side wall of the guide groove 130. The magnetic positioning member 700 has a simple structure and is easy to position. In other embodiments, positioning can be performed by bolt positioning, pin positioning, snap-on positioning, etc.

[0041] In this embodiment, the driving structure includes a clamping frame and a screw module 240. The clamping frame includes four guide columns 210. The guide columns 210 are evenly arranged at the four corners of the base 100. A mounting plate 220 is arranged on the top of the four guide columns 210. The screw module 240 is arranged on the mounting plate 220. A sliding plate 230 is arranged between the mounting plate 220 and the bottom plate 110. The sliding plate 230 is slidably sleeved on the four guide columns 210. The four guide columns 210 play a guiding role. A pressure head is arranged at the lower end of the sliding plate 230. The shape of the pressure head matches the lamination positioning groove 510. The technicians in this field can set it specifically according to the actual situation. In order to improve the sliding smoothness of the sliding plate 230, a sliding bearing is arranged between the guide column 210 and the sliding plate 230 to further improve the sliding stability. The guiding method in this embodiment is that the guide shaft and the sliding bearing cooperate to slide. In other embodiments, other mechanisms that can meet the same working conditions such as the guide rail slider mechanism can be used.

[0042] The clamping part is provided on the lower side of the screw module 240, and the rotating part is provided on the top of the screw module 240. The screw module 240 is composed of a motor, a reducer, a screw, a guide rail and other components. The power generated by the rotation is converted into linear motion, or the linear motion is converted into rotary motion. The ball screw is composed of a screw, a nut and a ball. Its working principle is to convert rotational motion into linear motion. Due to the small friction resistance, the ball screw can achieve high-precision linear motion under high load. The rotating part includes a handle or a rotating rod 241 for facilitating the rotation of the rotating screw and a rotating motor. Those skilled in the art will make specific arrangements according to actual conditions. Since this embodiment is a manual clamping device, a rotating rod 241 is used to drive the screw to rotate, thereby driving the clamping part to move up and down.

[0043] The sliding plate 230 is movably connected to the clamping part, and the pressure is transmitted to the battery cell through the sliding plate 230, so that the battery cell is evenly compressed. Specifically, the sliding plate 230 is provided with a connection groove 231 with an opening facing upward, and the edge of the connection groove 231 is provided with a retaining edge 232, and the clamping part includes a pressing block 242, and the pressing block 242 is movably connected to the connection groove 231 and abuts against the retaining edge 232, so that when the clamping part moves upward, it can also drive the sliding plate 230 to reset upward. The main reason is that the battery cell is evenly stressed. In some other embodiments, the clamping part can also be directly fixedly connected to the sliding plate 230.

[0044] In some other embodiments, a cylinder, an electric cylinder or other device may be used to press down to drive the sliding plate 230 to press down, or the sliding plate 230 may not be provided, and a cylinder, an electric cylinder or other device may directly press the battery cell.

[0045] Specific working principle: place the bottom support plate 520 in the stacking table 500, push the stacking table 500 into the equipment along the guide grooves 130 on both sides, so that the magnet on the rear side of the stacking table 500 is adsorbed with the magnet of the guide limit part 120, and the stacking table 500 is positioned; turn on the heating device 600 to heat the stacking table 500, and the preparation work is completed.

[0046] Place the negative electrode sheet on the second step 512 of the bottom layer on the bottom support sheet 520, and place an electrolyte layer on the first step 511 of the stacking table 500; manually rotate the rotating rod 241 to lower the pressure head of the pressing mechanism 200 to press the placed materials, read the pressure sensor reading during the pressing process, and maintain the pressure for 3-5 minutes after reaching the specified pressure, and reversely rotate the rotating rod 241 to raise the pressing block 242 of the pressing mechanism 200, and place the positive electrode stacking guide seat 400 into the corresponding groove of the stacking table 500 , place the positive electrode sheet into the positive electrode stacking guide seat 400, ensure the position accuracy of the sheet stacking by limiting the positive electrode stacking guide seat 400, remove the positive electrode stacking guide seat 400 and place an electrolyte layer on the first step 511 of the stacking table 500; operate the pressing mechanism 200 to press, maintain the pressure and return the stacked material; place the negative electrode stacking guide seat 300 into the corresponding slot of the stacking table 500, and perform the same operation as the positive electrode placement step; repeat this cycle until the specified number of layers is reached and the stacking is completed.

[0047] The lamination table 500 is taken out, and the laminated battery cells and the bottom support sheet 520 are taken out together; and the heating device 600 is turned off.

[0048] Above, a battery cell stack is completed.

[0049] The preferred implementation modes of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An all-solid-state battery stack pressing device, characterized in that: include: The clamping mechanism comprises a base, a clamping part and a driving structure, wherein the base and the clamping part are arranged opposite to each other, and the driving structure is used to drive the base and the clamping part to move closer to or farther from each other; A lamination platform is detachably arranged on the base, and the lamination platform is provided with a lamination positioning groove and a third positioning portion, and the lamination positioning groove is arranged opposite to the pressing portion; The stack guide seat is provided with a stack positioning opening, and the stack guide seat is provided with a fourth positioning portion which is detachably positioned and matched with the third positioning portion, so that the stack positioning opening and the stack positioning groove are relatively fitted.

2. The all-solid-state battery stack pressing device according to claim 1, characterized in that: A bottom supporting piece is detachably provided at the bottom of the stack positioning groove, a second step is provided at the top surface of the bottom supporting piece, and a first step is provided at the inner peripheral wall of the stack positioning groove.

3. The all-solid-state battery stack pressing device according to claim 2, characterized in that: The stack positioning groove is provided with a third step, and the bottom support sheet is positioned and clamped on the third step.

4. The all-solid-state battery stack pressing device according to claim 1, characterized in that: The base is provided with a guide limit portion, the guide limit portion is provided with a guide groove, and the stacking platform is inserted into the guide groove.

5. The all-solid-state battery stack pressing device according to claim 4, characterized in that: A positioning and fixing structure for positioning and fixing the lamination platform is provided between the guide limiting portion and the lamination platform.

6. The all-solid-state battery stack pressing device according to claim 1, characterized in that: A pressure sensor is arranged between the bottom of the lamination table and the base.

7. The all-solid-state battery stack pressing device according to claim 1, characterized in that: It also includes a heating device, which is used to heat the lamination table.

8. The all-solid-state battery stack pressing device according to claim 1, characterized in that: The clamping mechanism comprises a clamping frame and a screw module arranged on the clamping frame, the clamping portion is arranged at one end of the screw module close to the lamination positioning groove, and the screw module is provided with a rotating portion.

9. The all-solid-state battery stack pressing device according to claim 8, characterized in that: The pressing frame is slidably provided with a sliding plate, one end of the sliding plate close to the lamination positioning groove is provided with a pressing head, and the sliding plate is movably connected to the pressing part.

10. The all-solid-state battery stack pressing device according to claim 9, characterized in that: The pressing frame is provided with a guide column, the sliding plate is slidably sleeved on the guide column, and a sliding bearing is provided between the guide column and the sliding plate.

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