A method for non-destructive disassembly of a single battery and a tool used therein

Abstract

The present invention is applicable to the technical field of waste battery recycling, and provides a method for non-destructive splitting of single cells and a tool used therefor, the method comprising: S10, fixing the battery unit to be disassembled on a mounting platform, so that the battery unit to be disassembled is aligned with a tool installed on a driving device; S20: driving the driving device, so that the driving device drives the tool to perform circular cutting along the gap between the fixing part of the battery unit to be disassembled and the single cell of the battery unit to be disassembled, thereby separating the fixing part and the single cell. The method for non-destructive splitting of single cells provided by the present invention drives the tool to cut along the gap between the fixing part and the single cell by the driving device, that is, the tool unit cuts off the fixing part along the outer side of the single cell, so as to achieve the purpose of non-destructive separation of the single cell, avoid the tool damaging the outer shell of the single cell, and solve the technical problems of low yield rate of manual disassembly and unsuitability for large-scale disassembly of batteries.

Description

Technical Field

[0001] The invention belongs to the technical field of waste battery recycling, and more specifically, relates to a method for non-destructively splitting a single battery and a tool used therefor. Background Art

[0002] The development of electric vehicles has led to an explosive growth in the use of lithium-ion power batteries, which will inevitably bring a large number of retired power lithium-ion batteries. However, retired lithium-ion power batteries still have a relatively considerable practical charge capacity, and they can be reused in order to extend their design cycle. After cascade utilization, the battery no longer has a practical charge capacity and needs to be processed as a resource to meet the needs of environmental protection, full utilization of mineral resources and sustainable development of the new energy industry. During cascade utilization and resource processing, it is often necessary to separate the single battery from the battery unit.

[0003] Many lithium-ion power battery systems use cylindrical single cells to construct battery units. Cylindrical single cells are usually small in size and large in number. The general disassembly method is to manually disassemble and destroy the shell of the single cell, pour out the electrolyte and disassemble it. However, the manual disassembly method has a low yield rate and is not suitable for large-scale disassembly of battery cells. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a method for non-destructively disassembling a single battery and a tool used therefor, so as to solve the technical problems that the existing disassembly method has a low yield and is not suitable for large-scale disassembly of battery cells.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for non-destructive disassembly of a single cell, comprising the following steps:

[0006] S10: fixing the battery unit to be disassembled on the mounting platform, so that the battery unit to be disassembled is aligned with the tool installed on the driving device;

[0007] S20: starting the driving device so that the driving device drives the cutter to perform circular cutting along the gap between the fixing member of the battery unit to be disassembled and the single battery of the battery unit to be disassembled, so as to separate the fixing member and the single battery.

[0008] Optionally, in step S20, the driving end of the driving device drives the unloading ejector rod of the tool unit to move along the axial direction of the single battery to eject the disassembled single battery.

[0009] Optionally, in step S20, the driving end of the driving device drives the multiple blades of the tool unit to perform circumferential cutting along the outer wall of the single battery.

[0010] The present invention further provides a cutting tool, which is applied to the above-mentioned method for non-destructive disassembly of single cells, wherein the cutting tool is used to cut a battery cell to be disassembled, wherein the battery cell to be disassembled comprises a fixing member and a plurality of single cells fixed in the fixing member, and the cutting tool comprises:

[0011] Mounting plate; and

[0012] A plurality of tool units are installed at intervals along the length direction and the width direction of the mounting plate, one end of the tool unit is connected to the driving end of the driving device, and the other end of the tool unit is used to separate the fixing member and the single battery.

[0013] Optionally, the axial center distance between two adjacent tool units distributed along the length direction of the mounting plate is 40mm-70mm; the axial center distance between two adjacent tool units distributed along the width direction of the mounting plate is 40mm-70mm. Optionally, the tool unit includes:

[0014] An unloading ejector rod connected to the driving end of the driving device;

[0015] A connecting piece, telescopically connected to the unloading push rod; and

[0016] A plurality of blades extend from the circumferential surface of the connecting member toward a direction away from the connecting member, and the plurality of blades are distributed at intervals along the circumference of the connecting member.

[0017] Optionally, the blade comprises:

[0018] A connecting portion connected to a circumferential surface of the connecting member;

[0019] a cutting portion extending from an end of the connecting portion toward the single battery, the cutting portion being used to separate the fixing member from the single battery;

[0020] Wherein, a chip guide groove is formed between two adjacent connecting parts, and the chip guide groove is a through groove or a closed groove.

[0021] Optionally, the thickness of the chip guide groove is less than or equal to the thickness of the cutting portion.

[0022] Optionally, the tips of the plurality of cutting portions are all deflected towards the same direction.

[0023] Optionally, the blade is a straight cylindrical structure or a spiral structure.

[0024] The beneficial effects of the method for non-destructive splitting of single cells and the use of a cutter provided by the present invention are: compared with the prior art, during disassembly, a cutter unit of the cutter driven by a driving device cuts along the gap between a fixing part and the single cell, that is, the cutter unit cuts off the fixing part along the outer side of the single cell, so as to achieve the purpose of non-destructive separation of the single cell, avoiding damage to the outer shell of the single cell by the cutter during the cutting process, and solving the technical problems of low yield rate of manual disassembly and unsuitability for large-scale disassembly of batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A flow chart of a method for non-destructive splitting of a single cell provided by an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the three-dimensional structure of the tool and the battery unit to be disassembled provided in the first embodiment of the present invention Figure 1 ;

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the tool and the battery unit to be disassembled provided in the second embodiment of the present invention Figure 2 ;

[0029] Figure 4 Schematic diagram of the three-dimensional structure of the tool and the battery unit to be disassembled provided in the third embodiment of the present invention Figure 3 ;

[0030] Figure 5 A schematic diagram of the three-dimensional structure of a battery unit to be disassembled after disassembly provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the connecting member and the blade used in the first embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the three-dimensional structure of a connecting member and a blade used in a second embodiment of the present invention;

[0033] Figure 8 A schematic diagram of the three-dimensional structure of a connecting member and a blade used in a third embodiment of the present invention;

[0034] Fig. 9 A schematic diagram of the three-dimensional structure of a connecting member and a blade used in a third embodiment of the present invention;

[0035] Fig.10 A schematic diagram of the three-dimensional structure of a connecting member and a blade used in a fourth embodiment of the present invention;

[0036] Fig.11 A schematic side view of the structure of a connecting member and a blade provided in a fourth embodiment of the present invention;

[0037] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure along line AA;

[0038] Fig.13 A schematic top view of the structure of a connector and a blade provided in a fourth embodiment of the present invention.

[0039] Among them, the reference numerals in the figure are:

[0040] 1-battery unit to be disassembled; 12-fixing part; 121-first chip; 122-second chip; 123-remaining part; 13-single battery; 2-tool; 20-mounting plate; 21-tool unit; 211-unloading push rod; 212-connecting part; 213-blade; 2130-chip guide groove; 2131-connecting part; 2132-cutting part; T1-thickness of cutting part; L1-length of connecting part; L2-inner length of blade; L3-sum of length of connecting part and blade; R1-inner radius of connecting part; R2-outer radius of blade; A1-arc length of blade support buffer part; A2-arc length of tool top; T1-thickness of cutting part; T2-thickness of connecting part; T3-thickness of chip guide groove. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Please also read Figure 1 and Figure 2 , the method for non-destructive disassembly of a single cell 13 provided by an embodiment of the present invention is now described. The method is mainly used for non-destructive disassembly of a battery unit composed of cylindrical single cells 13 connected in series or in parallel, wherein the battery unit is mainly a battery module or a battery pack. The method separates the cylindrical single cell 13 from the fixation, support, connection, bonding, thermal management environment, etc. of the battery unit by physical cutting, and maintains the integrity and reusability of the single cell 13, thereby meeting the requirements of cascade utilization and refined resource recycling of the power battery constructed by the cylindrical single cell 13.

[0046] According to the above description, a method for non-destructive disassembly of a single cell 13 is provided, the method comprising:

[0047] S10, fixing the battery unit 1 to be disassembled on the mounting platform, so that the battery unit 1 to be disassembled is aligned with the tool 2 installed on the driving device;

[0048] S20 : ​​driving the driving device to drive the cutter 2 to perform annular cutting along the gap between the fixing member 12 of the battery unit 1 to be disassembled and the single battery 13 of the battery unit 1 to be disassembled, thereby separating the fixing member 12 and the single battery 13 .

[0049] It should be noted that in S10, the driving device is a driving cylinder plus a motor, so that in step S20, the driving device can drive the tool 2 to rotate and descend to separate the fixing member 12 and the single battery 13. The driving cylinder plus the motor can adopt the driving cylinder and the motor in the prior art, and the driving cylinder and the motor can realize the rotation and descent of the tool 2 through the transmission member, which is not limited here.

[0050] Compared with the prior art, the method for non-destructive disassembly of a single battery 13 provided by the present invention is different from that of the prior art. During disassembly, the driving device drives the tool unit 21 of the tool 2 to cut along the gap between the fixing part 12 and the single battery 13, that is, the tool unit 21 cuts off the fixing part 12 along the outer side of the single battery 13 to achieve the purpose of non-destructive separation of the single battery 13, thereby preventing the tool 2 from damaging the outer shell of the single battery 13 during the cutting process, and solving the technical problems of low yield rate of manual disassembly and unsuitability for large-scale disassembly of batteries.

[0051] In step S20, the driving end of the driving device drives the unloading push rod 211 of the tool unit 21 to move along the axial direction of the single battery 13 to eject the unloaded single battery 13. That is, the driving device is started to drive the unloading push rod 211 to eject the unloaded single battery 13. Of course, in other embodiments, the pneumatic method can also be used to clamp and unload the separated single battery 13. The pneumatic method can be clamped and unloaded in an existing manner, which is not limited here.

[0052] The whole cutting process separates the single battery 13 from the fixing member 12, and produces four parts, such as Figure 5 As shown, the single battery 13, the first chip 121, the second chip 122 and the remaining part 123 are separated by cutting. The first chip 121 may adhere to the surface of the separated single battery 13 according to the difference in the material of the fixing part 12, or may be broken during the separation process. The shape of this part can be controlled by the form and size of the cutting tool 21. The second chip 122 is the part of the fixing part 12 cut into chips by the tool unit 21. During the cutting process, this part is discharged in the form of chips.

[0053] Furthermore, in order to ensure that the retention time of the disassembled single battery 13 in the tool unit 21 is controllable, magnetic attraction, vacuum attraction or mechanical clamping can be used to prevent the single battery 13 from being uncontrollably loosened from the cutting tool 21. Among them, magnetic attraction, vacuum attraction or mechanical clamping can be set in an existing manner and is not limited here.

[0054] In another embodiment of the present invention, see Figures 2 to 4 , so that the driving end of the driving device drives the multiple blades 213 of the cutter unit 21 to cut around the outer wall of the single battery 13. Among them, the multiple blades 213 are suitable for disassembling the battery unit 1 to be disassembled, which has a moderate density and a large hardness of the fixing member 12 and needs to be disassembled at a high speed.

[0055] Specifically, the two-blade blade 213 is suitable for separating the battery cells 1 to be disassembled whose fixing parts 12 are dense, difficult to compress, and / or easy to stick. Among them, the straight blade blade 213 can be used for the fixing parts 12 with low hardness and / or not easy to stick, and the spiral blade 213 can be used for the fixing parts 12 with high hardness and / or easy to stick.

[0056] The present invention also provides a tool 2, see Figures 2 to 4 , applied to the above-mentioned method for non-destructive disassembly of a single battery 13, the cutter 2 is used to cut the battery unit 1 to be disassembled, and the battery unit 1 to be disassembled includes a fixing member 12 and a plurality of single batteries 13 fixed in the fixing member 12. The cutter 2 includes a mounting plate 20 and a plurality of cutter units 21. The plurality of cutter units 21 are respectively installed at intervals along the length direction and the width direction of the mounting plate 20, one end of the cutter unit 21 is connected to the driving end of the driving device, and the other end of the cutter unit 21 is used to separate the fixing member 12 and the single battery 13.

[0057] In another embodiment of the present invention, please refer to Figures 2 to 3 The axial center distance between two adjacent cutter units 21 distributed along the length direction of the mounting plate 20 is 40mm-70mm; the axial center distance between two adjacent cutter units 21 distributed along the width direction of the mounting plate 20 is 40mm-70mm. Within this interval, the effect of cutting the single battery 13 is better. If the axial center distance is too small, it is easy to cut the shell of the single battery 13. If the axial center distance is too small, the separated single battery 13 will carry too many fixing parts 12, resulting in incomplete separation.

[0058] Furthermore, the tool unit 21 includes an unloading push rod 211, a connecting member 212, and a plurality of blades 213. The unloading push rod 211 is connected to the driving end of the driving device, the connecting member 212 is telescopically connected to the unloading push rod 211, and the plurality of blades 213 extend from the circumferential surface of the connecting member 212 in a direction away from the connecting member 212, and the plurality of blades 213 are distributed at intervals along the circumference of the connecting member 212. The use of the plurality of blades 213 facilitates annular cutting to separate the fixing member 12 and the single battery 13.

[0059] In one embodiment of the present invention, see further Figure 2 and Figure 6The blade 213 includes a connecting portion 2131 and a cutting portion 2132. The connecting portion 2131 is connected to the circumferential surface of the connecting member 212, and the cutting portion 2132 extends from the end of the connecting portion 2131 toward the direction of the single battery 13. The cutting portion 2132 is used to separate the fixing member 12 and the single battery 13. A chip guide groove 2130 is formed between two adjacent connecting portions 2131 to facilitate chip removal. Depending on the fixing member 12, the chip guide groove 2130 is set as a through groove or a closed groove. The closed groove chip guide groove 2130 is suitable for the scenario where the density and hardness of the cutting chips of the disassembly fixing member 12 are large, and air pressure suction and / or unloading are required. Specifically, in this embodiment, the thickness of the chip guide groove 2130 is not greater than the thickness of the cutting portion 2132.

[0060] Furthermore, the tips of the multiple cutting parts 2132 are all deflected in the same direction. Specifically, the tips of the multiple cutting parts 2132 are all extended in the direction of the force, thereby improving the cutting performance of the cutting parts 2132, so that the multiple cutting parts 2132 all apply force to the object in the same direction, and the cutting effect is better.

[0061] The following embodiments are provided based on the types of tool units 21 used by different fixing members 12:

[0062] Embodiment 1:

[0063] like Figure 2 and Figure 6 As shown, a 20s1p32700 battery pack is fixed with plastic frames at both ends combined with internal foamed polyurethane, and the size of its single battery 13 is 32mm in diameter and 70mm in height. The axial center distance between two adjacent single batteries 13 is 40mm. A two-leaf tool unit 21 with an inner diameter of 33mm, a wall thickness of 1mm, and an inner length of 75mm is selected. The axial center distance between two adjacent tool units is 40mm. Matching the arrangement of the single batteries 13, a 4*5 array is combined to split the battery pack, that is, 4 tool units 21 are distributed along the width direction of the mounting plate 20, and 5 tool units 21 are distributed along the length direction of the mounting plate 20. One working cycle of the tool unit 21 array can complete the splitting of all 20 single batteries 13.

[0064] Embodiment 2:

[0065] like Figure 3 and Figure 7As shown, a 2s12p 18650 battery module fixed with solid glue filling has a single cell 13 with a diameter of 18mm and a height of 65mm. The axial center distances of the single cells 13 are not all the same. The axial center distances of the two adjacent single cells 13 along the length direction of the fixing member 12 are 20mm, and the axial center distances of the two single cells 13 in the width direction are 25mm. Since the axial center distances of the two adjacent single cells 13 in the length direction and the width direction are small, the operation is performed in intervals. A spiral two-leaf tool unit 21 with an inner diameter of 19mm, a wall thickness of 1mm, and an inner length of 71mm is selected. According to the arrangement of the single cells 13, 6 groups of tool units 21 are arranged in intervals, with three tool units 21 distributed in the length direction and two tool units 21 distributed in the width direction, that is, the spacing between the two adjacent tool units 21 along the length direction of the mounting plate 20 is 40mm, and the spacing between the two adjacent tool units 21 in the width direction is 50mm. During the operation, 4 working cycles are required to complete the disassembly of all 24 single cells 13. Since the battery module filled with solid glue has a relatively high hardness, a straight blade type blade 213 is easily broken, so a spiral two-blade cutter unit 21 is used.

[0066] Embodiment three:

[0067] like Figure 4 , Figure 8 and Fig. 9 As shown, a 4s5p 32139 battery module fixed by resin brackets at both ends has a single cell 13 with a diameter of 32mm and a height of 139mm. The axial center spacing between two adjacent single cells 13 is 40mm. An 8-straight blade cutter 2 with an inner diameter of 34mm and a wall thickness of 1mm is selected. Since its fixing parts 12 are located at both ends of the single cell 13, there is no fixing part 12 in the middle, and the single cell 13 is relatively long, the inner length of the cutter 2 is selected to be 25mm, and the two ends of the single cell 13 are cut simultaneously. In this way, one working cycle can complete the disassembly of all 20 single cells 13 of one battery module. In this embodiment, the spacing between two adjacent tool units 21 is 40mm. Since the length of the single cell 13 is relatively long, if a tool unit 21 with a longer length is used, the blade 213 is easily broken.

[0068] Embodiment 4:

[0069] See Fig.10 , dismantling a 16s3p 26650 battery pack that is partially filled with epoxy resin, the size of the single battery 13 is 26mm in diameter and 65mm in height. The axial distance between two adjacent single batteries 13 is 35mm. Fig. 9The cylindrical tool unit 21 with a chip guide groove 2130 is shown. The chip guide groove 2130 is a closed groove. The inner diameter of the tool unit is 26mm, the inner length is 70mm, the outer diameter is 30mm, the outer diameter of the tool head is 30mm, the wall thickness at the chip guide groove 2130 is 0.5mm, and the axial distance between two adjacent tool units 21 is 70mm. Cutting powder is discharged from the chip guide groove 2130 on the outer wall of the tool 2. The disassembled single battery 13 is fixed by negative pressure suction. The material is unloaded by positive pressure pushing.

[0070] It should be noted that, compared with the tool unit 21 in Example 1, when the axial center distance between two adjacent tool units 21 is larger, such as when the axial center distance between two adjacent tool units 21 is 80 mm, the other dimensions of the tool unit 21 are the same, and the target battery pack to be disassembled and the disassembly steps are the same, but the outer shell of the battery cell 13 obtained after disassembly is damaged, and there are obvious knife marks on the outer shell.

[0071] Compared with the tool unit 21 in Example 2, when the distance between two adjacent tool units 21 along the length direction of the mounting plate 20 is small, such as when the distance between two adjacent tool units 21 along the length direction of the mounting plate 20 is 20 mm, the other dimensions of the tool unit 21 are the same, and the target battery pack to be disassembled and the method steps are the same. When the shell of the single battery 13 obtained after disassembly is damaged, the battery single cell 13 is slightly swollen.

[0072] It can be seen from this that if the axial center distance between two adjacent tool units 21 is too large or too small, it will cause certain damage to the single battery 13.

[0073] Furthermore, the chip guide grooves 2130 in the first, second and third embodiments are all through grooves, and the chip guide grooves 2130 in the fourth embodiment are closed grooves, that is, the bottom of the chip guide grooves 2130 is closed. In general, the plurality of blades 213 are suitable for disassembling battery cells 1 that have a moderate density and a large hardness of the fixing member 12 and need to be disassembled at a high speed.

[0074] Specifically, the two-blade blade 213 is suitable for disassembling battery cells 1 to be disassembled whose fixing parts 12 have high density, are not easy to compress, and / or are easy to stick. Among them, the straight blade blade 213 can be used for the fixing parts 12 with low hardness and / or not easy to stick, and the spiral blade 213 can be used for the fixing parts 12 with high hardness and / or easy to stick.

[0075] The following describes various dimensions of the tool unit 21 in conjunction with the tool 2 in the fourth embodiment.

[0076] Further integration Figures 11 to 13The thickness T1 of the cutting portion 2132 is determined according to the spacing between the single cells 13 and the characteristics of the fixing member 12. When the gap between the single cells 13 and the fixing member 12 is larger and the fixing member 12 is harder, the cutting portion 2132 with a larger thickness T1 is selected.

[0077] The angle between the cutting portion 2132 and the cutting surface is determined according to the characteristics of the fixing part 12. A larger angle is selected for a harder fixing part 12, and a smaller angle is selected for a fixing part 12 with greater viscosity to achieve reliable cutting. The cutting portion 2132 and the connecting portion 2131 are made of different materials or the same material is subjected to different heat treatments.

[0078] The inner length L2 of the blade 213 is slightly larger than the length of the single battery 13 plus the height of the fixings 12 at both ends, so as to fully separate the single battery 13 and the fixings 12. L1 is the length of the connecting portion 2131, which needs to be larger than a preset value when the disassembled single battery 13 is held and unloaded by air pressure to ensure reliable holding under the set pressure. On the other hand, the connecting portion 2131 can increase the overall strength of the entire tool unit 21. L2 is the length of the blade 213, and L3 is the sum of the lengths of the connecting member 212 and the blade 213.

[0079] The inner radius R1 of the connection part 2131 is determined according to the size of the single battery 13 and the characteristics of the fixing part 12. Since the fixing part 12 and the single battery 13 may have a certain range of deformation, it is generally selected to be slightly larger than the outer radius of the single battery 13. For a brittle fixing part 12, the inner radius R1 of the connection part 2131 is smaller, and for a sticky fixing part 12, the inner radius R1 of the connection part 2131 is larger. The outer radius R2 of the blade 213 is determined by the distance between the single battery 13 and the fixing part 12 and the thickness of the cutting part 2132.

[0080] The arc length A1 of the support buffer part of the blade 213 and the arc length A2 of the blade top are determined by the material strength of the blade 213 and the fixing part 12. If the material of the blade 213 is hard and the fixing part 12 is soft, then A1 and A2 are small, otherwise they are large. The thickness T3 of the chip guide groove 2130 is determined according to the material of the tool 2 and the properties of the cutting chips. If the material strength of the tool 2 is large and the cutting chips are dense, then the thickness T3 of the chip guide groove 2130 is large, but not greater than the thickness T1 of the cutting part 2132. The thickness of the chip guide groove 2130 can be 0, that is, the tool unit 21 is an integrated cylindrical structure. The thickness T2 of the connecting part 2131 is determined by the material of the tool 2 and the material of the cutting chips. If the material of the tool 2 is hard and the cutting chips are dense, a smaller T2 is used.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting tool, characterized in that: The cutter is used to cut a battery cell to be disassembled, wherein the battery cell to be disassembled includes a fixing member and a plurality of single cells fixed in the fixing member, and the cutter includes: Mounting plate; and A plurality of tool units, wherein the plurality of tool units are installed at intervals along the length direction and the width direction of the mounting plate, one end of the tool unit is connected to the driving end of the driving device, and the other end of the tool unit is used to separate the fixing member and the single battery; The axial center distance between two adjacent tool units distributed along the length direction of the mounting plate is 40 mm-70 mm; the axial center distance between two adjacent tool units distributed along the width direction of the mounting plate is 40 mm-70 mm; The tool unit comprises: An unloading ejector rod connected to the driving end of the driving device; A connecting piece, telescopically connected to the unloading push rod; and A plurality of blades extend from the circumferential surface of the connecting member in a direction away from the connecting member, and the plurality of blades are spaced apart along the circumference of the connecting member, The blade comprises: A connecting portion connected to a circumferential surface of the connecting member; a cutting portion extending from the end of the connecting portion toward the single battery, the cutting portion being used to separate the fixing member and the single battery; wherein a chip guide groove is formed between two adjacent connecting portions, the chip guide groove being a through groove or a closed groove; The thickness of the chip guide groove is less than or equal to the thickness of the cutting portion; The tips of the plurality of cutting portions are all deflected in the same direction; The blade is a straight cylindrical structure or a spiral structure.

2. A method for non-destructive disassembly of a single battery, characterized in that: The tool according to claim 1 is implemented, comprising the following steps: S10: fixing the battery unit to be disassembled on the mounting platform, so that the battery unit to be disassembled is aligned with the tool installed on the driving device; S20: starting the driving device so that the driving device drives the cutter to perform circular cutting along the gap between the fixing member of the battery unit to be disassembled and the single battery of the battery unit to be disassembled, so as to separate the fixing member and the single battery.

3. The method for non-destructive disassembly of a single cell according to claim 2, characterized in that: In step S20, the driving end of the driving device drives the unloading ejector rod of the tool unit to move along the axial direction of the single battery to eject the disassembled single battery.

4. The method for non-destructive disassembly of a single cell according to claim 2, characterized in that: In step S20, the driving end of the driving device drives the multiple blades of the cutter unit to cut around the outer wall of the single battery.

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