A portable button-type electrochemical energy storage device disassembly method and device

Abstract

The present invention relates to the field of disassembly of energy storage devices, and in particular to a portable button-type electrochemical energy storage device disassembly method and device. The disassembly device of the present invention includes a "["-shaped bracket, a moving module, a fixed module and a rotating handle, and the disassembly device can be conveniently transferred inside and outside the glove box only through a small transition compartment of the glove box. When performing the disassembly operation, the button-type energy storage device is placed between a liftable pressure column and a pressure-bearing column. By twisting the rotating handle to rotate the transmission screw, the downward pressure is applied to drive the liftable pressure column to press the negative electrode of the button battery and the internal electrode sheet, gasket and shrapnel into the lower outer ring, while the positive electrode shell is stuck on the top of the lower outer ring, thereby realizing the disassembly of the button-type energy storage device. The present invention can complete the disassembly operation at low cost and conveniently, with good disassembly accuracy. The entire disassembly process can realize the lossless and efficient removal of the electrode sheet, saving time and effort, and effectively improving the disassembly efficiency in the failure analysis process of the energy storage device.

Description

Technical Field

[0001] The invention relates to the field of disassembling energy storage devices, and in particular to a method and a device for disassembling a portable button-type electrochemical energy storage device. Background Art

[0002] Against the backdrop of energy crisis and environmental pollution, electrochemical devices represented by lithium-ion batteries and supercapacitors have become the mainstream energy storage devices developed in the 21st century. However, electrochemical energy storage devices may fail during production, transportation, use or long-term storage, which may affect the performance and reliability of the device, or may cause the entire energy storage component to stop working or cause safety problems. These failure phenomena include capacity attenuation (diving), poor consistency, easy self-discharge, high and low temperature performance attenuation, short cycle life, large internal resistance, abnormal battery pack voltage, gas production, leakage, short circuit, deformation, thermal runaway, etc. Accurately diagnosing the failure of electrochemical energy storage devices and exploring their failure mechanisms are the main tasks of failure analysis of chemical energy storage devices, which also have far-reaching significance for the performance improvement and technological development of lithium batteries.

[0003] At present, button-type energy storage devices are an important means of testing the performance of existing materials in the laboratory and conducting preliminary electrochemical performance testing and evaluation of new materials and new process products. Button-type energy storage devices require less materials and have a short process flow. The performance of new materials can be measured more accurately, which is of great significance to the development and preparation of such materials, and the design and application of full batteries. However, once the button-type shell represented by CR2032, CR2025, CR2016, etc. is encapsulated, it is difficult to disassemble. If violent disassembly such as pliers is used, permanent damage such as tearing of the electrode sheet and falling of the material will be caused, and its failure mechanism cannot be accurately diagnosed and explored. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned button-type shell disassembly and provide a compact, lightweight, portable button-type electrochemical energy storage device disassembly method and device that can achieve efficient separation of the positive and negative electrodes of the button-type shell and lossless extraction of the electrode sheets.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A portable button-type electrochemical energy storage device disassembly device comprises a "["-shaped bracket, a moving module, a fixed module and a rotating handle;

[0007] The moving module is composed of a hollow cylinder and a pressure column;

[0008] One end face of the hollow cylinder is a concave tapered inclined surface, at least three trapezoidal grooves are provided on the inner wall of the hollow cylinder, and at least three guide rods are provided on the concave tapered inclined surface; the pressure column is a cylinder, at least three trapezoidal sliders are provided on the outer wall of the pressure column, and the trapezoidal sliders match the trapezoidal grooves; the pressure column is arranged in the inner cavity of the hollow cylinder, and the trapezoidal sliders match the trapezoidal grooves, so that the pressure column slides up and down in the hollow cylinder;

[0009] The fixed module is composed of a pressure-bearing column, a cylinder and a spring coil; one end face of the cylinder is an outwardly convex conical inclined surface, the outwardly convex conical inclined surface matches the inwardly concave conical inclined surface of the hollow cylinder, and at least three guide holes are provided on the outwardly convex conical inclined surface, and the positions and numbers of the guide holes match the guide rod; the spring coil is arranged in the inner cavity of the cylinder, and the pressure-bearing column is arranged in the inner cavity of the cylinder and is located above the spring coil;

[0010] The fixed module is arranged on the lower plate surface of the "["-shaped bracket; the guide rod of the movable module passes through the guide hole of the fixed module so that the movable module is installed above the fixed module; a screw hole is provided on the upper plate surface of the "["-shaped bracket, and a screw rod is provided on the top of the pressure column. The screw rod passes through the screw hole on the upper plate surface of the "["-shaped bracket and is connected to the rotating handle.

[0011] Furthermore, the pressure column is provided with at least three trapezoidal grooves, and the pressure column and the trapezoidal slider are connected by hexagon socket screws or fixed connecting rods, so that the trapezoidal slider is fastened in the trapezoidal grooves. The present invention is provided with at least three trapezoidal grooves, which can better ensure that the pressure column is vertically lifted and lowered along the axial direction of the central axis without deviating from the center; at the same time, the trapezoidal slider is embedded in the trapezoidal groove on the pressure column, and is fastened to the pressure column by hexagon socket screws or fixed connecting rods. The detachable modular design facilitates the installation of the equipment; and the large end of the trapezoidal slider is embedded in the hollow cylinder to ensure positioning accuracy.

[0012] Furthermore, the angle θ between the concave conical surface of the hollow cylinder and the guide rod is 30-35°. By designing the angle θ between the concave conical surface of the hollow cylinder and the guide rod to be 30-35°, it is ensured that during the pressing process, there is a greater pressure in the downward axial direction, and the gravity of the hollow cylinder can be used to make the concave conical surface of the hollow cylinder and the convex conical surface of the cylinder fit closely, and under the action of the designed guide rod, it is ensured that the pressure column and the pressure-bearing column, the hollow cylinder and the cylinder can all be aligned in the center.

[0013] Furthermore, the lower end of the guide rod extending out of the concave conical inclined end face of the hollow cylinder is conical, the diameter of the guide rod near the top end face of the hollow cylinder is larger than the diameter of the concave conical inclined end face extending out of the hollow cylinder, and the guide rod is fixed on the hollow cylinder in an interference fit manner through the guide rod mounting hole. The guide rod is an important mechanism for ensuring that the pressure column and the pressure-bearing column, and the hollow cylinder and the center of the cylinder are aligned before the button battery to be removed is placed in the device and the concave conical inclined surface of the hollow cylinder and the convex conical inclined surface of the cylinder are not yet fitted; the conical design of the lower end of the guide rod can effectively utilize the guiding effect of the conical surface to smoothly and accurately insert the guide tube into the guide rod mounting hole; the thick upper end and thin lower end diameter design of the guide rod can make the guide rod in an interference fit state in the guide rod mounting hole. Under the action of pressure, when the hollow cylinder and the cylinder are approaching each other, the guide rod will not slide out of the guide rod mounting hole, and will be installed more and more tightly, simplifying the structure and achieving good expected results.

[0014] Furthermore, the lengths of the trapezoidal groove and the trapezoidal slider are both greater than 1 / 3 of the height of the pressure column and less than half of the height of the pressure column, so as to ensure that the bottom of the pressure column is a complete cylinder, and under the action of the trapezoidal slider, it can be raised and lowered along the axial direction. The length of the trapezoidal slide is 2-5 times longer than the length of the trapezoidal slider by the thickness of the positive electrode shell of the button battery. The bottom of the trapezoidal slider is embedded in the trapezoidal slide and can move up and down along the trapezoidal slide. At the same time, in order to realize the function of disassembling the button-type device, it is necessary to ensure that under pressure, the pressure block can be fully moved downward and at least reach a position parallel to the top end face of the convex cone inclined surface of the cylinder. Therefore, the length of the trapezoidal slide needs to be 2-5 times longer than the length of the trapezoidal slider by the thickness of the positive electrode shell of the button battery.

[0015] Furthermore, the diameter of the pressure column is 1-2.5mm larger than the outer diameter of the button cell negative electrode shell, and smaller than the inner diameter of the button cell positive electrode shell. The purpose of the present invention is to disassemble the button-type energy storage device more completely. In order to ensure the integrity of the disassembly, the diameter of the pressure column cannot be too small. If the diameter is too small, the pressure on the positive electrode shell is too large, which will result in force only at the center of the device shell. At this time, not only is the torque required large, but the local force in the center will tear the shell, making it difficult to ensure the integrity of the disassembly; if the diameter is too large, the pressure column diameter may be larger than the cylinder and cannot enter the cylinder, and the positive and negative shells of the device may not be completely separated. At the same time, the top of the convex cone slope of the cylinder may be curled under high pressure, causing damage to the entire device.

[0016] Furthermore, the diameter of the pressure column differs from the outer diameter of the negative electrode shell of the button battery by ±0.5mm. During the disassembly process, the pressure column plays the role of supporting the negative electrode shell; after the disassembly is completed and the pressure is released, the pressure column ejects the negative electrode shell out of the cylinder under the action of the spring. Therefore, the diameter of the pressure column should be close to the outer diameter of the negative electrode shell of the button battery. If it is too small, it will not be conducive to the placement and support of the button device to keep it balanced; if it is too large, it will cause the cylinder diameter to be too large, even larger than the outer diameter of the positive electrode of the button device, and the removal function cannot be achieved.

[0017] Furthermore, the port diameter of the convex conical slope of the cylinder is larger than the outer diameter of the button battery negative electrode shell, and smaller than the sum of the outer diameter of the button battery negative electrode shell and the diameter of the negative electrode sealing ring of the battery shell, so as to ensure that the end face of the convex conical slope of the cylinder is just embedded between the positive electrode shell and the negative electrode shell of the button-type device; at the same time, the convex conical slope design of the cylinder can use the slope to convert the vertical pressure into a horizontal force perpendicular to the axial direction of the device shell. Under the action of this force, the lower edge of the positive electrode shell of the button-type device is forcibly opened in an arc-shaped seal and separated from the negative electrode shell.

[0018] Furthermore, the “[”-shaped bracket, rotating handle, screw, trapezoidal groove, guide rod, pressure column, trapezoidal slider, hollow cylinder, trapezoidal slide, guide rod mounting hole, pressure column, guide hole, cylinder and spring ring are made of metal with hardness greater than or equal to 304 stainless steel. At present, 304 stainless steel is the mainstream shell material of button European-style devices. To open the rebate-type sealing structure of this material, the hardness of the material must be greater than or equal to 304 stainless steel, otherwise it cannot be disassembled.

[0019] Furthermore, the pressure column, the pressure bearing column and the cylinder are made of martensitic stainless steel, which has a much higher hardness than 304 stainless steel. Therefore, the pressure column, the pressure bearing column and the cylinder can be preferably made of martensitic stainless steel.

[0020] A method for disassembling a portable button-type electrochemical energy storage device comprises the following steps:

[0021] Step 1: Place the button battery to be disassembled between the pressure-applying column and the pressure-bearing column, wherein the negative electrode of the button battery faces the pressure-bearing column of the fixed module;

[0022] Step 2: Insert the guide rod into the guide hole, ensuring that the centers of the pressure-applying column and the pressure-bearing column are aligned. Under the action of the protruding conical slope of the hollow cylinder and the barrel, the positive curved edge of the button battery is just overlapped with the top edge of the protruding conical slope of the barrel of the fixed module;

[0023] Step 3: Twist the rotating handle clockwise, the pressure column is gradually pressed toward the pressure column, and the trapezoidal slider slides up and down along the trapezoidal slide groove; as the pressure column moves downward, the pressure column shrinks into the cylinder, the spring coil is compressed, and the height of the cylinder remains unchanged;

[0024] Step 4: As the pressure column continues to descend, the pressure column presses the negative electrode shell of the button battery and the electrode sheet, spring sheet, and pressing sheet inside it into the interior of the cylinder, and the positive electrode shell of the button battery is torn by the outer edge of the outer edge of the inclined surface of the cylinder under the action of the inner edge of the protruding conical inclined surface of the cylinder, and is separated from the negative electrode shell and the electrode sheet, spring sheet, and pressing sheet inside it, thereby realizing non-destructive disassembly of the internal electrode sheet of the button battery;

[0025] Step 5: Twist the rotating handle counterclockwise, the moving module, guide rod, pressure column and hollow cylinder are all lifted, and the pressure column, button battery and pressure column are separated from each other; the pressure column and the disassembled button battery are ejected and higher than the height of the cylinder under the action of the spring coil, so that the disassembled button battery is removed.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention has a novel and unique structure, a small size, and is easy to operate. It can be easily moved in and out of the glove box and can be easily carried and transferred. The precise structural design ensures lossless, complete and reliable disassembly. The annular structure of the trapezoidal groove, the guide rod and the conical slope ensures that the center of the pressure column and the pressure column corresponds precisely, ensuring accurate positioning and avoiding tearing and damage to the electrode sheet during the disassembly of the shell. The rotary handle and the screw-type combined pressurization method have an operating force of less than 8kg. The appearance is beautiful, the maintenance is simple, and the solid steel structure and the bracket reinforcement rib structure design ensure stable and safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the assembly structure of the present invention.

[0029] Figure 2 It is a side view of the assembly structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the movable module and the fixed module located directly below it of the present invention.

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the dynamic module of the present invention.

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the dynamic module of the present invention when viewed from above.

[0033] Figure 6 This is a perspective view of the three-dimensional structure of the dynamic module of the present invention.

[0034] Figure 7 This is a 45-degree top view of the three-dimensional structure of the module of the present invention.

[0035] Figure 8 This is a 135-degree bottom perspective view of the three-dimensional structure of the module of the present invention.

[0036] Fig. 9 It is a schematic diagram and cross-sectional orientation of the assembly structure engineering of the moving module and the fixed module of the present invention.

[0037] Fig.10 It is the AA cross-sectional view of the moving module and the fixed module of the present invention.

[0038] Fig.11 It is a BB cross-sectional view of the moving module and the fixed module of the present invention.

[0039] Fig.12 It is a DD cross-sectional view of the moving module and the fixed module of the present invention.

[0040] Fig.13 It is the EE cross-sectional view of the moving module and the fixed module of the present invention.

[0041] Fig.14 It is an assembly diagram of the disassembling device and the button battery of the present invention.

[0042] Fig.15 It is a comparison diagram of the disassembly device of the present invention and the pliers-type tool in disassembling a button-type energy storage device. DETAILED DESCRIPTION

[0043] The examples described below are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operating procedures, but do not limit the protection scope of the patent of the present invention. Any technical solution obtained in the form of equivalent replacement or equivalent transformation should fall within the protection scope of the present invention.

[0044] A portable button-type electrochemical energy storage device disassembly device comprises a "["-shaped bracket 1, a moving module 2, a fixed module 3 and a rotating handle 4;

[0045] The moving module 2 is composed of a hollow cylinder 206 and a pressure column 204;

[0046] One end face of the hollow cylinder 206 is a concave tapered inclined surface, and at least three trapezoidal slide grooves 207 are provided on the inner wall of the hollow cylinder 206; at least three guide rods 203 are provided on the concave tapered inclined surface; the pressure column 204 is a cylinder, and at least three trapezoidal sliders 205 are provided on the outer wall of the pressure column 204, and the trapezoidal sliders 205 match the trapezoidal slide grooves 207; the pressure column 204 is arranged in the inner cavity of the hollow cylinder 206, and the trapezoidal sliders 205 match the trapezoidal slide grooves 207, so that the pressure column 204 slides up and down in the hollow cylinder 206;

[0047] The fixed module 3 is composed of a pressure-bearing column 301, a cylinder 303 and a spring ring 304; one end face of the cylinder 303 is an outwardly convex conical slope, which matches the inwardly concave conical slope of the hollow cylinder 206, and at least three guide holes 302 are provided on the outwardly convex conical slope, and the positions and numbers of the guide holes 302 match the guide rod 203; the spring ring 304 is arranged in the inner cavity of the cylinder 303, and the pressure-bearing column 301 is arranged in the inner cavity of the cylinder 303 and is located above the spring ring 304;

[0048] The fixed module 3 is arranged on the lower plate surface of the "["-shaped bracket 1, and the guide rod 203 of the movable module 2 passes through the guide hole 302 of the fixed module 3 so that the movable module 2 is installed above the fixed module 3; a screw hole 106 is provided on the upper plate surface of the "["-shaped bracket 1, and a screw rod 201 is provided at the top end of the pressure column 204. The screw rod 201 passes through the screw hole 106 on the upper plate surface of the "["-shaped bracket 1 and is connected to the rotating handle 4.

[0049] Furthermore, at least three trapezoidal grooves 202 are provided on the pressure column 204 , and the pressure column 204 is connected to the trapezoidal slider 205 via a hexagon socket screw or a fixed connecting rod, so that the trapezoidal slider 205 is fastened in the trapezoidal groove 202 .

[0050] Furthermore, the angle θ between the concave conical slope of the hollow cylinder 206 and the guide rod 203 is 30-35°.

[0051] Furthermore, the lower end portion of the guide rod 203 extending out of the concave conical oblique end surface of the hollow cylinder 206 is conical, and the diameter of the guide rod 203 close to the top end surface of the hollow cylinder 206 is larger than the diameter of the concave conical oblique end surface extending out of the hollow cylinder 206. The guide rod 203 is fixed to the hollow cylinder 206 by an interference fit through the guide rod mounting hole 208.

[0052] Furthermore, the lengths of the trapezoidal groove 202 and the trapezoidal slider 205 are both greater than 1 / 3 of the height of the pressure column 204 and less than half of the height of the pressure column 204; the length of the trapezoidal slide 207 is 2-5 times longer than the length of the trapezoidal slider 205, which is the thickness of the positive electrode shell of the button battery.

[0053] Furthermore, the diameter of the pressure column 204 is 1-2.5 mm larger than the outer diameter of the button battery negative electrode shell 403 and smaller than the inner diameter of the button battery positive electrode shell 401 .

[0054] Furthermore, the diameter of the pressure-bearing column 301 differs from the outer diameter of the button cell negative electrode shell 403 by ±0.5 mm.

[0055] Furthermore, the port diameter of the outer convex conical slope of the cylinder 303 is larger than the outer diameter of the button cell negative electrode shell 403 , and smaller than the sum of the outer diameter of the button cell negative electrode shell 403 and the diameter of the battery shell negative electrode sealing ring 402 .

[0056] Furthermore, the “[”-shaped bracket 1, rotating handle 4, screw 201, trapezoidal groove 202, guide rod 203, pressure column 204, trapezoidal slider 205, hollow cylinder 206, trapezoidal slide groove 207, guide rod mounting hole 208, pressure column 301, guide hole 302, cylinder 303 and spring ring 304 are made of metal with a hardness greater than or equal to 304 stainless steel.

[0057] Furthermore, the pressure-applying column 204 , the pressure-bearing column 301 and the cylinder 303 are made of martensitic stainless steel.

[0058] A method for disassembling a portable button-type electrochemical energy storage device comprises the following steps:

[0059] Step 1: Place the button battery to be disassembled between the pressure-applying column 204 and the pressure-bearing column 301 , wherein the negative electrode of the button battery faces the pressure-bearing column 301 of the fixed module 3 ;

[0060] Step 2: Insert the guide rod 203 into the guide hole 302 to ensure that the pressure column 204 and the pressure column 301 are aligned in the center; under the action of the hollow cylinder 206 and the outward protruding conical slope of the cylinder 303, the positive curved edge of the button battery is just overlapped with the top edge of the outward protruding conical slope of the cylinder 303 of the fixed module 3;

[0061] Step 3: Twist the rotating handle 4 in the clockwise direction, the pressure column 204 is gradually pressed toward the pressure column 301, and the trapezoidal slider 205 slides up and down along the trapezoidal slide groove 207; as the pressure column 204 moves downward, the pressure column 301 shrinks into the interior of the cylinder 303, the spring coil 304 is compressed, and the height of the cylinder 303 remains unchanged;

[0062] Step 4: As the pressure column 204 continues to descend, the pressure column 204 presses the negative electrode shell of the button battery and the electrode sheet, spring sheet, and pressing sheet inside thereof into the interior of the cylinder 303, and the positive electrode shell of the button battery is torn by the outer edge of the outer edge of the inclined surface of the cylinder 303 under the action of the outer protruding conical inclined surface inner edge of the cylinder 303, and is separated from the negative electrode shell and the electrode sheet, spring sheet, and pressing sheet inside thereof, thereby realizing non-destructive disassembly of the electrode sheet inside the button battery;

[0063] Step 5: Twist the rotating handle 4 counterclockwise, the movable module 2, the guide rod 203, the pressure column 204 and the hollow cylinder 206 are all lifted, and the pressure column 204, the button battery and the pressure column 301 are separated from each other; the pressure column 301 and the disassembled button battery are ejected under the action of the spring coil 304 and are higher than the height of the cylinder 303, so that the disassembled button battery is removed.

[0064] The trapezoidal groove, guide rod and conical inclined surface structure in the disassembly method of the present invention ensure that the centers of the pressure-applying column and the pressure-bearing column correspond precisely, ensure accurate positioning, and avoid tearing and damage to the electrode sheet during the disassembly of the shell; in addition, the negative electrode shell and the electrode sheet, spring sheet and pressing sheet inside the negative electrode shell are all protected in the negative electrode shell and will not be torn or damaged by other external forces, so they can be preserved relatively intact.

[0065] Embodiment 1:

[0066] according to Figure 1-2As shown, the moving module 2 and the fixed module 3 are installed on the "["-shaped bracket 1 and assembled. The assembled equipment is transferred into the glove box through the small transition compartment of the glove box. The CR2032 button-type lithium-ion battery to be disassembled is placed between the liftable pressure column 204 of the moving module 2 and the vertically slidable pressure column 301 of the fixed module 3, wherein the negative pole of the CR2032 button battery faces the vertically slidable pressure column 301 of the fixed module 3; and the guide rod 203 is inserted into the guide hole 302 to ensure that the centers of the pressure column 204 and the pressure column 301 are facing each other; at the same time, under the action of the parallel inclined surfaces of the hollow cylinder 206 and the barrel 303, the curved edge of the positive pole of the button battery is just overlapped with the top edge of the inclined surface of the barrel 303 of the fixed module 3. By twisting the rotating handle 4 in the clockwise direction, the pressure column 204 is gradually pressed toward the vertically slidable pressure column 301. In this process, the trapezoidal slider 205 connected to the trapezoidal groove 202 on the pressure column by a connecting rod or a hexagon socket screw slides up and down along the trapezoidal slide groove 207 on the cylinder body; as the pressure column 204 moves downward, the pressure column 301 is retracted into the interior of the cylinder body 303, the spring coil 304 is compressed, and the height of the cylinder body 303 remains unchanged; as the pressure column 204 continues to descend, the pressure column 204 will CR2032 type The negative electrode shell of the button battery and the electrode sheets, spring sheets, pressing sheets, etc. inside thereof are all pressed into the interior of the cylinder 303 (when the pressing depth is greater than the thickness of the button battery), while the positive electrode shell of the 2032-type button battery cannot continue to be supported on the top of the cylinder 303 as it descends because its outer edge is stuck on the inclined inner edge of the cylinder 303; thus, the outer edge of the positive electrode shell is torn under the action of the inclined inner edge of the cylinder 303, and is separated from the negative electrode shell and the electrode sheets, spring sheets, pressing sheets, etc. inside thereof, thereby realizing the non-destructive disassembly of the electrode sheets inside the button battery. Afterwards, the rotating handle 103 is twisted counterclockwise, and under the action of the screw 201, the movable module 2 and its attached guide rod 203, pressure column 204, and hollow cylinder 206 are all lifted, and the pressure column 204, button battery, and pressure column 301 are separated. The vertically slidable pressure column 301 and the disassembled CR2032 button battery are ejected and higher than the height of the cylinder 303 under the action of the spring coil 304, so that the disassembled button battery can be easily removed.

[0067] The outer shell appearance image (Figure) and the electron microscope image (Figure) of the electrode sheet of the button-type energy storage device after disassembly are used to characterize its disassembly effect.

[0068] Embodiment 2:

[0069] according to Figure 1-2As shown, the moving module 2 and the fixed module 3 are installed on the "["-shaped bracket 1 and assembled. The CR2016 button-type supercapacitor to be disassembled is placed between the pressure column 204 of the moving module 2 and the vertically slidable pressure column 301 of the fixed module 3, wherein the negative electrode of the CR2016 button-type supercapacitor faces the vertically slidable pressure column 301 of the fixed module 3; and the guide rod 203 is inserted into the guide hole 302 to ensure that the pressure column 204 and the pressure column 301 are facing each other; at the same time, under the action of the parallel inclined surfaces of the hollow cylinder 206 and the barrel 303, the curved edge of the positive electrode of the CR2016 button-type supercapacitor is just overlapped with the top edge of the inclined surface of the barrel 303 of the fixed module 3. By twisting the rotating handle 4 in the clockwise direction, the pressure column 204 is gradually pressed toward the vertically slidable pressure column 301. In this process, the trapezoidal slider 205 connected to the trapezoidal groove 202 on the pressure column by a connecting rod or a hexagon socket screw slides up and down along the trapezoidal slide groove 207 on the cylinder body; as the pressure column 204 moves downward, the pressure column 301 is retracted into the interior of the cylinder body 303, the spring coil 304 is compressed, and the height of the cylinder body 303 remains unchanged; as the pressure column 204 continues to descend, the pressure column 204 presses the negative electrode of the CR2016 button-type supercapacitor The shell and the electrode sheets, spring sheets, pressing sheets, etc. inside thereof are all pressed into the interior of the cylinder 303 (when the pressing depth is greater than the thickness of the button battery), while the positive electrode shell of the CR2025 button-type supercapacitor cannot continue to be supported on the top of the cylinder 303 as it descends because its outer edge is stuck on the inclined inner edge of the cylinder 303; thus, the outer edge of the positive electrode shell is torn under the action of the inclined inner edge of the cylinder 303, and is separated from the negative electrode shell and the electrode sheets, spring sheets, pressing sheets, etc. inside thereof, thereby realizing the non-destructive disassembly of the internal electrode sheets of the CR2016 button-type supercapacitor. Afterwards, the rotating handle 4 is twisted counterclockwise, and the movable module 2 and its attached guide rod 203, pressure column 204, and hollow cylinder 206 are all lifted, and the pressure column 204, CR2016 button-type supercapacitor, and pressure column 301 are separated. The vertically slidable pressure column 301 and the disassembled CR2016 button-type supercapacitor are ejected and higher than the height of the cylinder 303 under the action of the spring coil 304, so that the disassembled button battery can be easily removed.

[0070] The outer shell appearance picture (picture) and the electron microscope picture (picture) of the electrode sheet of the button-type energy storage device after disassembly are used to characterize its disassembly effect.

[0071] Embodiment 3:

[0072] according to Figure 1-2As shown, the moving module 2 and the fixed module 3 are installed on the "["-shaped bracket 1 and assembled. The assembled equipment is transferred into the glove box through the small transition chamber of the glove box. The CR2025 button-type lithium-sulfur battery to be disassembled is placed between the pressure column 204 of the moving module 2 and the vertically slidable pressure column 301 of the fixed module 3, wherein the negative electrode of the CR2025 button-type lithium-sulfur battery faces the vertically slidable pressure column 301 of the fixed module 3; and the guide rod 203 is inserted into the guide hole 302 to ensure that the pressure column 204 and the pressure column 301 are facing each other; at the same time, under the action of the parallel inclined surfaces of the hollow cylinder 206 and the barrel 303, the curved edge of the positive electrode of the CR2025 button-type lithium-sulfur battery is just overlapped with the top edge of the inclined surface of the barrel 303 of the fixed module 3. By twisting the rotating handle 4 in the clockwise direction, the pressure column 204 is gradually pressed toward the pressure column 301 which can slide vertically. In this process, the trapezoidal slider 205 connected to the trapezoidal groove 202 on the pressure column by the connecting rod or the hexagon socket screw slides up and down along the trapezoidal slide groove 207 on the cylinder body; as the pressure column 204 moves downward, the pressure column 301 is retracted into the interior of the cylinder body 303, the spring coil 304 is compressed, and the height of the cylinder body 303 remains unchanged; as the pressure column 204 continues to descend, the pressure column 204 presses the negative pressure of the CR2025 button-type lithium-sulfur battery. The electrode case and the electrode sheets, spring sheets, pressing sheets, etc. inside the electrode case are all pressed into the interior of the cylinder 303 (when the pressing depth is greater than the thickness of the button battery), and the positive electrode case of the CR2025 button-type lithium-sulfur battery cannot continue to be supported on the top of the cylinder 303 as it descends because its outer edge is stuck on the inclined inner edge of the cylinder 303; in this way, the outer edge of the positive electrode case is torn under the action of the inclined inner edge of the cylinder 303, and is separated from the negative electrode case and the electrode sheets, spring sheets, pressing sheets, etc. inside the negative electrode case, thereby realizing the non-destructive disassembly of the internal electrode sheets of the CR2025 button-type lithium-sulfur battery. Afterwards, the rotating handle 4 is twisted counterclockwise, and the movable module 2 and its attached guide rod 203, pressure column 204, and hollow cylinder 206 are lifted, and the pressure column 204, CR2025 button-type lithium-sulfur battery, and pressure column 301 are separated. The vertically slidable pressure column 301 and the disassembled CR2025 button-type lithium-sulfur battery are ejected and higher than the height of the cylinder 303 under the action of the spring coil 304, so that the disassembled button battery can be easily removed.

[0073] The outer shell appearance image (Figure) and the electron microscope image (Figure) of the electrode sheet of the button-type energy storage device after disassembly are used to characterize its disassembly effect.

[0074] Comparative Example:

[0075] Use a vise or bench pliers to clamp the CR2032 button-type energy storage device, and use nozzle pliers or needle-nosed pliers to tear the positive and negative electrodes apart along the seals of the positive and negative electrode shells. This disassembly causes the electrode sheets to change with the deformation of the positive / negative electrode shells, resulting in irreversible damage. See Fig.15 a. The outer shell appearance of the button-type energy storage device after the device of the present invention is disassembled, and the electrode sheet is intact. Fig.15 b.

Claims

1. A portable button-type electrochemical energy storage device disassembly device, characterized in that: It comprises a "["-shaped bracket (1), a moving module (2), a fixed module (3) and a rotating handle (4); The moving module (2) is composed of a hollow cylinder (206) and a pressure column (204); One end face of the hollow cylinder (206) is a concave tapered inclined surface, at least three trapezoidal slide grooves (207) are provided on the inner wall of the hollow cylinder (206), and at least three guide rods (203) are provided on the concave tapered inclined surface; the pressure column (204) is a cylinder, at least three trapezoidal sliders (205) are provided on the outer wall of the pressure column (204), and the trapezoidal sliders (205) match the trapezoidal slide grooves (207); the pressure column (204) is arranged in the inner cavity of the hollow cylinder (206), and the trapezoidal sliders (205) match the trapezoidal slide grooves (207), so that the pressure column (204) slides up and down in the hollow cylinder (206); The fixed module (3) is composed of a pressure-bearing column (301), a cylinder (303) and a spring coil (304); one end surface of the cylinder (303) is an outwardly convex conical inclined surface, the outwardly convex conical inclined surface matches the inwardly concave conical inclined surface of the hollow cylinder (206), at least three guide holes (302) are provided on the outwardly convex conical inclined surface, the positions and numbers of the guide holes (302) match those of the guide rod (203); the spring coil (304) is arranged in the inner cavity of the cylinder (303), and the pressure-bearing column (301) is arranged in the inner cavity of the cylinder (303) and is located above the spring coil (304); The fixed module (3) is arranged on the lower plate surface of the "["-shaped bracket (1); the guide rod (203) of the movable module (2) passes through the guide hole (302) of the fixed module (3) so that the movable module (2) is installed above the fixed module (3); a screw hole (106) is provided on the upper plate surface of the "["-shaped bracket (1), and a screw rod (201) is provided at the top end of the pressure column (204); the screw rod (201) passes through the screw hole (106) on the upper plate surface of the "["-shaped bracket (1) and is connected to the rotating handle (4); The diameter of the pressure column (204) is 1-2.5 mm larger than the outer diameter of the button battery negative electrode shell (403), and smaller than the inner diameter of the button battery positive electrode shell (401); The port diameter of the outer convex conical inclined surface of the cylinder (303) is larger than the outer diameter of the button battery negative electrode shell (403), and smaller than the sum of the outer diameter of the button battery negative electrode shell (403) and the diameter of the battery shell negative electrode sealing ring (402).

2. A portable button-type electrochemical energy storage device disassembly device according to claim 1, characterized in that: The pressure column (204) is provided with at least three trapezoidal grooves (202), and the pressure column (204) is connected to the trapezoidal slider (205) via a hexagon socket screw or a fixed connecting rod, so that the trapezoidal slider (205) is fastened in the trapezoidal groove (202).

3. A portable button-type electrochemical energy storage device disassembly device according to claim 2, characterized in that: The included angle θ between the concave conical inclined surface of the hollow cylinder (206) and the guide rod (203) is 30-35°.

4. A portable button-type electrochemical energy storage device disassembly device according to claim 3, characterized in that: The lower end portion of the guide rod (203) extending out of the concave conical oblique end surface of the hollow cylinder (206) is conical, and the diameter of the end surface of the guide rod (203) close to the top of the hollow cylinder (206) is larger than the diameter of the concave conical oblique end surface extending out of the hollow cylinder (206). The guide rod (203) is fixed to the hollow cylinder (206) in an interference fit manner through the guide rod mounting hole (208).

5. A portable button-type electrochemical energy storage device disassembly device according to claim 4, characterized in that: The lengths of the trapezoidal groove (202) and the trapezoidal slider (205) are both greater than 1 / 3 of the height of the pressure column (204) and less than half the height of the pressure column (204); the length of the trapezoidal slide groove (207) is 2-5 times longer than the length of the trapezoidal slider (205) by the thickness of the positive electrode shell of the button battery.

6. A portable button-type electrochemical energy storage device disassembly device according to claim 5, characterized in that: The diameter of the pressure-bearing column (301) differs from the outer diameter of the button cell negative electrode shell (403) by ±0.5 mm.

7. A portable button-type electrochemical energy storage device disassembly device according to claim 6, characterized in that: The "["-shaped bracket (1), the rotating handle (4), the screw rod (201), the trapezoidal groove (202), the guide rod (203), the pressure column (204), the trapezoidal slider (205), the hollow cylinder (206), the trapezoidal slide groove (207), the guide rod mounting hole (208), the pressure column (301), the guide hole (302), the cylinder (303) and the spring ring (304) are made of metal having a hardness greater than or equal to 304 stainless steel.

8. A method for disassembling a portable button-type electrochemical energy storage device using the disassembling device of claim 7, characterized in that: The following steps are involved: Step 1: placing the button battery to be disassembled between the pressure-applying column (204) and the pressure-bearing column (301), wherein the negative electrode of the button battery faces the pressure-bearing column (301) of the fixed module (3); Step 2: insert the guide rod (203) into the guide hole (302) to ensure that the centers of the pressure-applying column (204) and the pressure-bearing column (301) are aligned; under the action of the hollow cylinder (206) and the outwardly protruding conical inclined surface of the cylinder (303), the positive curved edge of the button battery is exactly overlapped with the top edge of the outwardly protruding conical inclined surface of the cylinder (303) of the fixed module (3); Step 3: Twist the rotating handle (4) in the clockwise direction, the pressure column (204) is gradually pressed toward the pressure column (301), and the trapezoidal slider (205) slides up and down along the trapezoidal slide groove (207); as the pressure column (204) moves downward, the pressure column (301) retracts into the interior of the cylinder (303), the spring coil (304) is compressed, and the height of the cylinder (303) remains unchanged; Step 4: As the pressure column (204) continues to descend, the pressure column (204) presses the negative electrode shell of the button battery and the electrode sheet, spring sheet, and pressing sheet inside thereof into the interior of the cylinder (303), while the positive electrode shell of the button battery is torn by the outer edge of the outer edge of the inclined surface of the cylinder (303) due to the outer edge of the outer edge of the outer conical inclined surface of the cylinder (303), and is separated from the negative electrode shell and the electrode sheet, spring sheet, and pressing sheet inside thereof, thereby realizing non-destructive disassembly of the electrode sheet inside the button battery; Step 5: The rotating handle (4) is twisted in a counterclockwise direction, and the moving module (2), the guide rod (203), the pressure column (204) and the hollow cylinder (206) are all lifted, and the pressure column (204), the button battery and the pressure column (301) are separated from each other; the pressure column (301) and the disassembled button battery are ejected under the action of the spring coil (304) and are higher than the height of the cylinder (303), so that the disassembled button battery can be removed.

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