Ultrasonic knife, ultrasonic knife assembly, battery disassembly device and battery disassembly method

Abstract

An ultrasonic scalpel, an ultrasonic scalpel assembly, a battery disassembly device and a battery disassembly method, wherein the ultrasonic scalpel is suitable for cutting a glue layer, the ultrasonic scalpel is suitable for being connected to one end of the axial direction of an ultrasonic mechanism, and the ultrasonic mechanism is suitable for converting an ultrasonic signal into mechanical vibration; the length direction of the ultrasonic scalpel is the axial direction of the ultrasonic mechanism; the ultrasonic scalpel satisfies: 0.3λ≤L≤0.8λ; wherein L is the length of the ultrasonic scalpel, and λ is the wavelength of the mechanical vibration provided by the ultrasonic mechanism. By setting the size parameters of the ultrasonic scalpel to satisfy 0.3λ≤L≤0.8λ, it is possible to avoid breakage during cutting due to high-frequency vibration, and the scalpel can be used for disassembling a battery module. Using the ultrasonic scalpel of the embodiment of the present invention to cut the glue layer of a battery module can overcome the defects of existing degumming solvents in disassembling batteries, such as being environmentally unfriendly, having low efficiency, high energy consumption, and high cost.

Description

Technical Field

[0001] The present invention relates to the technical field of battery disassembly, and in particular to an ultrasonic knife, an ultrasonic knife assembly, a battery disassembly device and a battery disassembly method. Background Art

[0002] In the fields of battery maintenance and recycling, it is necessary to disassemble and separate multiple batteries in a battery module. In a battery module, batteries are fixed with glue layers, and the glue layers need to be removed to separate the batteries.

[0003] At present, the main method used is to dissolve the battery module with a degumming solvent. The battery module is immersed in the degumming solvent. When the glue layer is dissolved, the battery can be separated from the battery. However, the degumming solvent is generally toxic and volatile. During the soaking process, a large amount of toxic and harmful waste gas will be generated, which will damage the health of the dismantling personnel, cause environmental pollution, and is not environmentally friendly. When using a degumming solvent, the battery module needs to be soaked in the degumming solvent for more than 24 hours to dissolve the glue layer, and the dismantling efficiency is low. In addition, the temperature generally needs to be kept at 55°C during the soaking process, and the heating energy consumption is high. Moreover, the degumming solvent is volatile and needs to be continuously replenished, and the dismantling cost investment is relatively large. Summary of the invention

[0004] The purpose of the present invention is to provide an ultrasonic knife, an ultrasonic knife assembly, a battery disassembly device and a battery disassembly method to solve the problems of environmental pollution, low efficiency, high energy consumption and high cost existing in current battery disassembly.

[0005] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides an ultrasonic knife, the ultrasonic knife is suitable for cutting a glue layer, the ultrasonic knife is suitable for being connected to one end of an axial direction of an ultrasonic mechanism, and the ultrasonic mechanism is suitable for converting an ultrasonic signal into mechanical vibration;

[0007] The length direction of the ultrasonic knife is the axial direction of the ultrasonic mechanism; the ultrasonic knife satisfies:

[0008] 0.3λ≤L≤0.8λ;

[0009] Wherein, L is the length of the ultrasonic knife, and λ is the wavelength of the mechanical vibration provided by the ultrasonic mechanism.

[0010] In one embodiment, the ultrasonic mechanism is rotationally symmetric about a first axis, and the ultrasonic knife also satisfies: (1 / 2)R≤W≤(2 / 3)R; wherein R is the maximum diameter of the ultrasonic mechanism, and W is the width of the end of the ultrasonic knife away from the ultrasonic mechanism.

[0011] In one embodiment, the ultrasonic knife further satisfies: 0.08 mm ≤ D ≤ 0.18 mm; wherein D is the thickness of the end of the ultrasonic knife away from the ultrasonic mechanism.

[0012] In one embodiment, the ultrasonic knife comprises a knife seat, a knife body and a knife tip, wherein the knife seat is suitable for connecting with the ultrasonic mechanism, and the knife seat, the knife body and the knife tip are connected in sequence in a direction away from the ultrasonic mechanism, satisfying:

[0013] L1=L2, and L1+L2=L;

[0014] Wherein, L1 is the length of the knife seat, and L2 is the total length of the knife body and the knife tip.

[0015] In one embodiment, the knife seat includes a first surface and a second surface opposite to each other in the thickness direction, a first angle is defined between the first surface and the second surface, the first angle is 8°-10°, and the thickness of the knife seat gradually decreases from an end connected to the ultrasonic mechanism toward an end away from the ultrasonic mechanism.

[0016] In one embodiment, the blade body includes a main body, a first blade portion, a second blade portion and a third blade portion, the main body is connected to one end of the blade holder away from the ultrasonic mechanism, the first blade portion is connected to one end of the main body away from the blade holder, the second blade portion is connected to one side of the main body in the width direction of the ultrasonic blade, and the third blade portion is connected to the other side of the main body in the width direction of the ultrasonic blade, and the blade angles of the first blade portion, the second blade portion and the third blade portion are all 8°-10°.

[0017] In one embodiment, the blade tip includes a fourth blade portion, a fifth blade portion and a sixth blade portion, the fourth blade portion is connected to one end of the blade body away from the blade seat, the fifth blade portion is connected to one side of the fourth blade portion in the width direction of the ultrasonic blade, and the sixth blade portion is connected to the other side of the fourth blade portion in the width direction of the ultrasonic blade, and the blade angles of the fourth blade portion, the fifth blade portion and the sixth blade portion are all 8°-10°.

[0018] In one embodiment, the blade seat is provided with a first blade groove, which is located in the middle of the blade seat and extends along the length direction of the ultrasonic blade; the blade body is provided with a second blade groove, which is located in the middle of the blade body and extends along the length direction of the ultrasonic blade.

[0019] In a second aspect, the present invention further provides an ultrasonic knife assembly, comprising:

[0020] An ultrasonic mechanism adapted to convert an ultrasonic signal into mechanical vibrations;

[0021] The ultrasonic knife described in any one of the various embodiments of the first aspect is connected to one axial end of the ultrasonic mechanism, and the ultrasonic knife is suitable for cutting the glue layer.

[0022] In one embodiment, the ultrasonic mechanism is rotationally symmetrical about a first axis, and includes a generator connector, a transducer, and an amplitude converter connected in sequence along an extension direction of the first axis, and an end of the amplitude converter away from the transducer is connected to the ultrasonic knife.

[0023] In a third aspect, the present invention further provides a battery disassembly device suitable for cutting the glue layer of a battery module, comprising:

[0024] Mobile components;

[0025] In the ultrasonic scalpel assembly described in any one of the various embodiments of the second aspect, the ultrasonic scalpel assembly is connected to the moving assembly, and the moving assembly is used to drive the ultrasonic scalpel assembly to move.

[0026] In one embodiment, the battery disassembly device further includes a positioning component, which is connected to the moving component, and the positioning component is used to determine the cutting starting position and cutting path of the ultrasonic knife.

[0027] In one embodiment, the positioning component includes a camera and a trajectory identifier, the camera is suitable for capturing images, and the trajectory identifier is suitable for monitoring the cutting starting position of the ultrasonic knife and the movement trajectory of the ultrasonic knife based on the images.

[0028] In one embodiment, the positioning component further includes a path analyzer, which is suitable for being electrically connected to the battery of the battery module and for sounding an alarm when the ultrasonic knife cuts into the battery in the battery module.

[0029] In one embodiment, it further includes a floating mechanism, which connects the moving component and the ultrasonic knife component, and the floating mechanism is suitable for telescopic movement to make the ultrasonic knife component and the moving component move closer to or farther away from each other.

[0030] In a fourth aspect, the present invention further provides a battery disassembly method, wherein the battery disassembly method uses the battery disassembly device described in any one of the various embodiments of the third aspect to cut a battery module, wherein the battery module comprises a plurality of batteries arranged in sequence in a thickness direction, two adjacent batteries are bonded by an adhesive layer, and both ends of the battery module in a height direction are also bonded with an adhesive layer;

[0031] The battery disassembly method comprises:

[0032] Clamp and fix the battery module;

[0033] The ultrasonic knife is driven by the moving component to move to the top of the glue layer between the adjacent batteries;

[0034] The ultrasonic knife is used to cut a cut on the glue layer in the height direction of the battery module, and the cut corresponds to the glue layer between adjacent batteries.

[0035] In one embodiment, the ultrasonic knife is driven by a moving component to move to the top of the glue layer between the adjacent batteries, including:

[0036] The position of the battery module is determined by the positioning assembly, and the position of the glue layer between the battery and the adjacent battery is determined according to the batteries exposed at both ends in the length direction of the battery module;

[0037] The ultrasonic knife assembly is driven to move by the moving assembly, and the positioning assembly detects the position of the ultrasonic knife in real time until the ultrasonic knife moves to just above the glue layer between the adjacent batteries.

[0038] In one embodiment, cutting a cut on the glue layer in the height direction of the battery module by using the ultrasonic knife includes:

[0039] After cutting a notch at one end of the battery module in the height direction, flipping the battery module, and cutting another notch at the other end of the battery module in the height direction, the two notches correspond to the same glue layer between two adjacent batteries;

[0040] One of the two cuts in the height direction of the battery module is selected, and the ultrasonic knife is used to continue cutting along the cut to deepen the cut.

[0041] In one embodiment, it further includes:

[0042] The ultrasonic knife is switched to a ceramic knife, and the ceramic knife is used to continue cutting along the deepened cut until the two adjacent batteries are separated.

[0043] By setting the size parameters of the ultrasonic knife to meet 0.3λ≤L≤0.8λ, breakage during cutting due to high-frequency vibration can be avoided, and the ultrasonic knife can be used for disassembling battery modules. Using the ultrasonic knife of the embodiment of the present invention to cut the glue layer of the battery module can overcome the defects of existing glue removal solvents for disassembling batteries, such as being environmentally unfriendly, inefficient, high energy consumption, and high cost. The ultrasonic knife can also be used for cutting glue layers between other entities, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 work.

[0045] Figure 1 is a three-dimensional diagram of a battery disassembly device according to an embodiment;

[0046] Figure 2 is a front view of a positioning assembly of one embodiment;

[0047] Figure 3 is a perspective view of a positioning assembly of an embodiment;

[0048] Figure 4 is a schematic diagram of electrical connection between a battery disassembling device and a battery module according to an embodiment;

[0049] Figure 5 is a three-dimensional diagram of an ultrasonic knife assembly according to an embodiment;

[0050] Figure 6 The present invention is a flow chart of a battery disassembly method according to an embodiment.

[0051] Description of reference numerals:

[0052] 100-battery disassembly device;

[0053] 10-mobile assembly, 15-mounting frame;

[0054] 20-positioning component, 21-camera, 22-track identifier, 23-path analyzer, 24-data transmission line, 25-support, 26-relay;

[0055] 30-ultrasonic knife assembly, 31-ultrasonic mechanism, 311-generator joint, 3111-connecting terminal, 312-transducer, 313-amplitude converter, 3131-vibration damping ring, 32-ultrasonic knife, 321-knife seat, 3211-first surface, 3212-second surface, 3213-first knife groove, 322-knife body, 3221-main body, 3222-first blade portion, 3223-second blade portion, 3224-third blade portion, 3225-second blade groove, 323-knife tip, 3231-fourth blade portion, 3232-fifth blade portion, 3233-sixth blade portion;

[0056] 200-battery module, 210-battery, 220-glue layer. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0059] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0060] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0061] refer to Figure 1 An embodiment of the present invention provides a battery disassembly device 100 suitable for cutting a glue layer 220 of a battery module 200 , including a moving component 10 and an ultrasonic knife component 30 .

[0062] For the convenience of explanation, a coordinate system XYZ is established, and the X direction, Y direction, and Z direction are perpendicular to each other. Among them, X is the length direction of the battery module 200, the length direction of the battery 210, the width direction of the ultrasonic knife 32, and the length direction of the glue layer 220. Y is the thickness direction of the battery module 200, the thickness direction of the battery 210, the thickness direction of the ultrasonic knife 32, and the thickness direction of the glue layer 220. Z is the height direction of the battery module 200, the width direction of the battery 210, the length direction of the ultrasonic knife 32, and the width direction of the glue layer 220.

[0063] The moving component 10 can be a robot, a manipulator, a multi-axis moving mechanism, etc. The moving component 10 can achieve freedom of movement in multiple directions, such as translation, lifting, rotation, etc., without specific limitation.

[0064] The ultrasonic knife assembly 30 is connected to the moving assembly 10, and the moving assembly 10 is used to drive the ultrasonic knife assembly 30 to move. The ultrasonic knife assembly 30 is a specially designed component of the embodiment of the present invention, and can use ultrasonic vibration to cut the glue layer 220 of the battery module 200.

[0065] The mobile component 10 can be fixed to a fixed foundation such as the ground, a bracket, or a wall at one end, and the other end of the mobile component 10 away from the fixed foundation can be connected and fixed to the ultrasonic knife component 30. The mobile component 10 can also be connected to the fixed foundation in other ways, and connected and fixed to the ultrasonic knife component 30 in other ways, without limitation. Exemplarily, the battery disassembly device 100 can also include a mounting frame 15, the mobile component 10 is connected to the mounting frame 15, and the ultrasonic knife component 30 is mounted on the mounting frame 15.

[0066] The battery module 200 includes a plurality of batteries 210 and a glue layer 220. The battery includes a shell and a battery cell contained in the shell, and the specific structure is not limited. The glue layer 220 can be a structural glue, a thermal conductive glue, etc. The plurality of batteries 210 are arranged in sequence along the thickness direction Y, and the two adjacent batteries 210 are bonded by the glue layer 220. The two sides of the battery 210 in the width direction Z are also covered with the glue layer 220. Figure 1 In the embodiment, the thickness direction Y of the battery 210 is approximately horizontal and perpendicular to the large surface of the battery 210, the width direction Z of the battery 210 is approximately vertical, and the length direction X of the battery 210 is also approximately horizontal. The length direction X, width direction Z and thickness direction Y of the battery 210 are perpendicular to each other.

[0067] After a plurality of batteries 210 are assembled to form a battery module 200, the glue layer 220 between the batteries 210 and the glue layer 220 covering the two side surfaces in the width direction Z of the battery 210 are connected. The bottom surface and the top surface of the battery module 200 are the two side surfaces in the width direction Z of the battery 210, respectively, thus forming a shape in which the glue layer 220 between the batteries 210 and the batteries 210 extends in the vertical direction, and the glue layer 220 on the bottom and top surfaces of the battery module 200 extends in the horizontal direction. To disassemble the battery module 200, it is necessary to first cut the glue layer 220 on the top surface of the battery module 200, and continue to cut along the glue layer 220 between the batteries 210 and the batteries 210, and then cut the glue layer 220 on the bottom surface of the battery module 200.

[0068] The battery module 200 of the embodiment of the present invention is a part of the battery device (not shown). Specifically, the battery device includes a tray (not shown), an upper cover (not shown) and a battery module 200. The tray has a receiving space, and the battery module 200 is received in the receiving space. The upper cover is provided on the tray to close the receiving space. In order to ensure that the battery module 200 is firmly fixed and to avoid short circuit caused by direct contact between the battery module 200 and the tray and the upper cover, glue will be poured into the receiving space. The liquid glue will flow to fill the gaps between the batteries 210 and the batteries 210 of the battery module 200, as well as the gaps between the battery module 200 and the tray and the upper cover. After the liquid glue solidifies, a glue layer 220 is formed.

[0069] The battery device may be a power battery pack for electric vehicles, or an energy storage battery pack for energy storage applications, without specific limitation.

[0070] When the battery device is disassembled, the upper cover is first removed, and then the battery module 200 is removed from the tray. Any method can be used for disassembly in these steps, and the embodiment of the present invention is not limited. The scheme of the embodiment of the present invention is mainly the disassembly of the battery 210 and the battery 210 of the battery module 200. Under the requirements of high energy density and small volume, the gap width between the battery 210 and the battery 210 of the battery module 200 is getting smaller and smaller, that is, the thickness of the glue layer 220 between the battery 210 and the battery 210 is getting thinner and thinner. The thickness of the glue layer 220 between the current battery 210 and the battery 210 is about 0.2mm-2mm. It is very difficult and almost impossible to use a traditional mechanical ultrasonic knife 32 to cut the glue layer 220 in such a small gap. In addition, the use of destructive mechanical cutting will produce a lot of debris, pollute the environment, and is not environmentally friendly. Therefore, the glue layer 220 is mainly removed by soaking in a degumming solvent.

[0071] However, degumming solvents are generally toxic and volatile, and a large amount of toxic and harmful waste gas will be generated during the soaking process, which will damage the health of the dismantling personnel and cause environmental pollution, which is not environmentally friendly. When using degumming solvents, the battery module 200 needs to be soaked in the degumming solvent for more than 24 hours to dissolve the glue layer 220, and the dismantling efficiency is low. In addition, the temperature generally needs to be kept at 55°C during the soaking process, and the heating energy consumption is relatively high. Moreover, the degumming solvent is volatile and needs to be continuously replenished, and the dismantling cost investment is relatively large.

[0072] The embodiment of the present invention abandons the current destructive mechanical cutting and degumming solvent soaking battery 210 disassembly solution, and proposes a new solution of cutting with an ultrasonic knife 32, which can overcome many problems existing in the existing solutions.

[0073] Specifically, in the battery disassembly device 100 of the embodiment of the present invention, the moving component 10 can drive the ultrasonic knife component 30 to move. The ultrasonic knife component 30 is a uniquely designed structure of the present invention, which includes an ultrasonic knife 32, which can cut the glue layer 220. The principle of cutting by the ultrasonic knife 32 is to concentrate ultrasonic energy at the tip of the ultrasonic knife 32, generate micron-level high-frequency vibration, and oscillate the surrounding air so that the air pushes away the surrounding glue layer 220, forming an effect similar to mechanical cutting. The ultrasonic knife 32 itself does not directly contact the glue layer 220. The ultrasonic knife component 30 and the ultrasonic knife 32 will be further described in detail later, and will not be described in detail here.

[0074] Therefore, the battery disassembly device 100 provided in the embodiment of the present invention can disassemble the battery module 200 by moving the ultrasonic knife component 30 through the moving component 10 to cut the glue layer 220 of the battery module 200. Compared with the disassembly by immersion in a degumming solvent, there is no toxic or harmful waste gas emission, no need to wait for a long time of immersion, no need to maintain constant temperature heating, and no need to replenish the degumming solvent, which solves the problems of the current degumming solvent disassembly solution that is not environmentally friendly, low efficiency, high energy consumption, and high cost.

[0075] In one embodiment, reference Figure 1 The battery disassembly device 100 further includes a positioning component 20 , which is connected to the moving component 10 , and is used to determine the cutting starting position and cutting path of the ultrasonic knife 32 .

[0076] The specific structure and positioning principle of the positioning component 20 are not limited. The positioning component 20 and the moving component 10 can be directly connected or indirectly connected through a structure such as a bracket, without limitation. The positioning component 20 determines the cutting starting position and cutting path of the ultrasonic knife 32, so that the ultrasonic knife 32 can be aligned with the battery 210 of the battery module 200 and the glue layer 220 directly between the battery 210, to avoid cutting the battery 210 crookedly.

[0077] Optional, reference Figure 2 and Figure 3 The positioning component 20 includes a camera 21 and a trajectory identifier 22. The camera 21 is suitable for capturing images, and the trajectory identifier 22 is suitable for monitoring the cutting starting position and the movement trajectory of the ultrasonic knife 32 according to the images.

[0078] The camera 21 may be a visible light camera 21, an infrared camera 21, etc., and the image captured by the camera 21 may be a picture or a video. The track identifier 22 may be any feasible chip, processor, computer, etc., without limitation. The track identifier 22 may analyze the image and output the location information of a specific feature in the image.

[0079] When in use, the camera 21 captures images around the battery module 200 and the ultrasonic knife 32. When the moving component 10 moves the ultrasonic knife component 30 and the ultrasonic knife 32 moves, the track identifier 22 can track whether the ultrasonic knife 32 has reached the top of the glue layer 220 between the batteries 210 and 210 of the battery module 200. If it has reached the top of the glue layer 220, the ultrasonic knife 32 reaches the starting position of cutting. The track identifier 22 also identifies the extension direction of the glue layer 220 between the batteries 210 and 210. Then, according to the extension direction information of the glue layer 220 identified by the track identifier 22, the ultrasonic knife 32 can be controlled to move along the extension direction to accurately cut the glue layer 220 without cutting the battery 210. After that, the cutting work can be started. During the cutting process, the moving component 10 drives the ultrasonic knife 32 to move so as to cut the adhesive layer 220 from one end to the other end along the movement trajectory of the ultrasonic knife 32 determined by the trajectory identifier 22. The camera 21 and the trajectory identifier 22 can also monitor the cutting progress and cutting status in real time during this process.

[0080] Optionally, the trajectory identifier 22 can be electrically connected to the teaching box (not shown) of the mobile component 10, so that the trajectory identifier 22 can input the information of the starting position of cutting and the length direction of the adhesive layer 220 recognized by the image captured by the camera 21 into the teaching box. The teaching box can be programmed to obtain the coordinates of the starting position of cutting and the program of the cutting path. The mobile component 10 can drive the ultrasonic knife 32 to the starting position of cutting according to the program of the teaching box, and cut along the preset cutting path.

[0081] Optional, reference Figure 1 , Figures 2 to 4 The positioning component 20 also includes a path analyzer 23, which is suitable for being electrically connected to the battery 210 of the battery module 200 and for sounding an alarm when the ultrasonic knife 32 cuts into the battery 210 in the battery module 200.

[0082] The path analyzer 23 may be any feasible chip, processor, computer, etc., without limitation. The electrical connection between the path analyzer 23 and the battery 210 may be in any feasible manner. For example, refer to Figure 4 , the path analyzer 23 is electrically connected to the relay 26, and the relay 26 is electrically connected to the battery 210. When the ultrasonic knife 32 does not cut the battery 210, the relay 26 is disconnected, the path analyzer 23 does not receive the current signal, and outputs a normal cutting signal; when the ultrasonic knife 32 cuts the battery 210, the relay 26 connects the battery 210 and the path analyzer 23, the path analyzer 23 receives the current signal, and outputs a signal that the battery 210 is cut. The alarm can be in the form of sound, light, etc., to remind the operator that the battery 210 is cut so that timely disposal can be carried out.

[0083] Optional, reference Figures 1 to 4 The camera 21, trajectory identifier 22 and path analyzer 23 in the positioning component 20 can be installed on a support member 25, and the support member 25 can be of any structure without limitation. The support member 25 can be installed on the mobile component 10 or the mounting frame 15 without limitation. The positioning component 20 can also include devices for signal transmission such as a data transmission line 24, which is not limited in the present invention. There can be multiple positioning components 20, and multiple positioning components 20 can be arranged at intervals. Multiple positioning components 20 can locate the relative positions of the ultrasonic knife 32 and the battery module 200 at different positions to improve the cutting accuracy.

[0084] Optional, reference Figure 1 The battery 210 cutting device also includes a floating mechanism (not shown), which connects the moving component 10 and the ultrasonic knife component 30. The floating mechanism is suitable for telescopic movement to make the ultrasonic knife component 30 and the moving component 10 approach or move away from each other.

[0085] The floating mechanism is, for example, a spring, a cylinder, etc. The floating mechanism can be directly connected to the end of the moving assembly 10 and the end of the ultrasonic knife assembly 30, the floating mechanism can also be connected between the moving assembly 10 and the mounting frame 15, or the floating mechanism can also be connected between the mounting frame 15 and the ultrasonic knife assembly 30, all without limitation.

[0086] The floating mechanism can perform telescopic movement. When the resistance increases during the process of cutting the glue layer 220, the floating mechanism can float upward, so that the ultrasonic knife assembly 30 moves toward the moving assembly 10 to reduce the resistance. In the thickness direction Y of the battery 210, the shell of the battery 210 may have a local bulge, which will cause the glue layer 220 in this part to be thinner. When the ultrasonic knife assembly 30 cuts here, it may hit the shell. The shell is usually aluminum alloy, which is much harder than the glue layer 220, and will produce greater resistance. If forced to cut, it may cut through the shell. Therefore, by floating up through the floating mechanism, it can avoid cutting through the shell and also avoid damage to the ultrasonic knife 32.

[0087] refer to Figure 1 and Figure 5 The embodiment of the present invention further provides an ultrasonic knife assembly 30, including an ultrasonic mechanism 31 and an ultrasonic knife 32.

[0088] The ultrasonic mechanism 31 is suitable for providing ultrasonic vibration. The ultrasonic knife 32 is connected to one end of the ultrasonic mechanism 31 in the axial direction, and the ultrasonic knife 32 is suitable for cutting the adhesive layer 220 .

[0089] The specific structure of the ultrasonic mechanism 31 is not limited. The ultrasonic vibration provided by the ultrasonic mechanism 31 includes converting ultrasonic signals into mechanical vibrations to drive the ultrasonic knife 32 away from the tip of the ultrasonic mechanism 31 to generate high-frequency vibrations to cut the glue layer 220 .

[0090] Optionally, the ultrasonic mechanism 31 is rotationally symmetrical about the first axis A, and includes a generator connector 311, a transducer 312, and an amplitude converter 313 connected in sequence along the extension direction (i.e., the Z direction) of the first axis A, and the end of the amplitude converter 313 away from the transducer 312 is connected to the ultrasonic knife 32. The generator connector 311, the transducer 312, and the amplitude converter 313 are all rotationally symmetrical about the first axis A, and the cross section at any position in the axial direction is circular.

[0091] The generator connector 311 is used to be electrically connected to an ultrasonic generator (not shown). Specifically, the generator connector 311 may be provided with a connection terminal 3111, and the ultrasonic generator may be connected to the connection terminal 3111 of the generator connector 311 via a cable. The ultrasonic generator may be a commonly used ultrasonic generator, and the ultrasonic generator is used to generate an ultrasonic signal. The ultrasonic generator may control output power, amplitude, energy, etc. by frequency setting, tracking compensation, amplitude setting, amplification matching output, signal detection and analysis, etc. according to the required ultrasonic signal. The ultrasonic signal is transmitted to the generator connector 311 and then to the transducer 312, and the transducer 312 is used to convert the ultrasonic signal into mechanical vibration. The amplitude converter 313 is used to amplify the amplitude of the mechanical vibration of the transducer 312 and output it to the ultrasonic knife 32. The amplitude converter 313 has a vibration reduction ring 3131, which has a larger diameter than the other parts of the amplitude converter 313.

[0092] The ultrasonic scalpel 32 is a specially designed ultrasonic scalpel 32 in the embodiment of the present invention, which will be described in detail below.

[0093] The ultrasonic knife assembly 30 of the embodiment of the present invention can use ultrasonic vibration to cut the adhesive layer 220, thereby overcoming the defects of existing adhesive removal solvents and mechanical cutting, such as being environmentally unfriendly, low in efficiency, high in energy consumption, and high in cost.

[0094] The ultrasonic knife 32 according to the embodiment of the present invention is described in detail below.

[0095] refer to Figure 5 The embodiment of the present invention provides an ultrasonic knife 32, combined with Figure 1 The ultrasonic knife 32 is suitable for cutting the glue layer 220. The glue layer 220 can be the glue layer 220 of the battery module 200, or the glue layer 220 between other entities. The ultrasonic knife 32 is suitable for being connected to one end of the axial direction of the ultrasonic mechanism 31, and the ultrasonic mechanism 31 is suitable for converting ultrasonic signals into mechanical vibrations.

[0096] The length direction Z of the ultrasonic blade 32 is the extension direction of the first axis A, and the width direction X and the thickness direction Y of the ultrasonic blade 32 are perpendicular to the length direction Z.

[0097] The ultrasonic knife 32 satisfies: 0.3λ≤L≤0.8λ.

[0098] Wherein, L is the length of the ultrasonic knife 32 , and λ is the wavelength of the mechanical vibration provided by the ultrasonic mechanism 31 .

[0099] The ultrasonic knife 32 is generally a thin sheet structure with a long length, and its length dimension needs to be strictly controlled to avoid breaking during high-frequency cutting. Specifically, its length L is related to the wavelength λ of the mechanical vibration provided by the ultrasonic mechanism 31. In the embodiment of the present invention, 0.3λ≤L≤0.8λ is set. Specifically, L can be 0.3λ, 0.4λ, 0.5λ, 0.6λ, 0.7λ, 0.8λ, etc., without limitation. As described above, the transducer 312 in the ultrasonic mechanism 31 is used to convert the ultrasonic signal into mechanical vibration, so λ is determined by the transducer 312. In the embodiment of the present invention, the wavelength λ of the mechanical vibration converted by the transducer 312 is set, and L is set to satisfy 0.3λ≤L≤0.8λ, so that the ultrasonic knife 32 can resonate, and the resonant ultrasonic knife is not easy to break during high-frequency vibration cutting, and the length L of the ultrasonic knife 32 obtained is greater than 150mm. Compared with the width and thickness of the ultrasonic knife 32, the length dimension of the ultrasonic knife 32 is significantly larger. In addition, the longer ultrasonic knife 32 is also advantageous for cutting into a deeper adhesive layer 220 .

[0100] The ultrasonic knife 32 of the embodiment of the present invention can avoid breakage during cutting due to high-frequency vibration by setting its size parameters to meet 0.3λ≤L≤0.8λ, and can be used for disassembling the battery module 200. Using the ultrasonic knife 32 of the embodiment of the present invention to cut the glue layer 220 of the battery module 200 can overcome the defects of existing glue removal solvents for disassembling the battery 210, such as being environmentally unfriendly, inefficient, high in energy consumption, and high in cost. The ultrasonic knife 32 can also be used for cutting the glue layer 220 between other entities, and has a wide range of applications.

[0101] In one embodiment, reference Figure 5 The ultrasonic mechanism 31 is rotationally symmetric around the first axis A, and the ultrasonic knife 32 also satisfies: (1 / 2)R≤W≤(2 / 3)R; wherein R is the maximum diameter of the ultrasonic mechanism 31, and W is the width of the end of the ultrasonic knife 32 away from the ultrasonic mechanism 31.

[0102] The tip of the ultrasonic scalpel 32, that is, the size of the end of the ultrasonic scalpel 32 away from the ultrasonic mechanism 31, must also meet certain conditions to avoid breakage. Specifically, the width W of the tip of the ultrasonic scalpel 32 satisfies (1 / 2)R≤W≤(2 / 3)R, wherein the maximum diameter of the ultrasonic mechanism 31 is at the vibration reduction ring 3131 of the amplitude converter 313.

[0103] In one embodiment, reference Figure 5 The ultrasonic knife 32 also satisfies: 0.08 mm ≤ D ≤ 0.18 mm, where D is the thickness of the end of the ultrasonic knife 32 away from the ultrasonic mechanism 31 .

[0104] The thickness D of the tip of the ultrasonic knife 32 must satisfy 0.08 mm ≤ D ≤ 0.18 mm, and the value of D can be 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, etc., without limitation. In the battery device, the thickness of the adhesive layer 220 between the batteries 210, that is, the minimum spacing between adjacent batteries 210, can reach 0.2 mm, so the thickness D of the tip of the ultrasonic knife 32 must be less than 0.2 mm to avoid cutting the batteries 210.

[0105] Optional, reference Figure 5 The ultrasonic knife 32 includes a knife seat 321, a knife body 322 and a knife tip 323. The knife seat 321 is suitable for connecting with the ultrasonic mechanism 31. The knife seat 321, the knife body 322 and the knife tip 323 are sequentially connected in a direction away from the ultrasonic mechanism 31. It satisfies: L1=L2, and L1+L2=L.

[0106] Wherein, L1 is the length of the blade seat 321 , and L2 is the total length of the blade body 322 and the blade tip 323 .

[0107] The knife seat 321, the knife body 322 and the knife tip 323 form a three-section structure, and the three sections have the same length direction, the same width direction and the same thickness direction.

[0108] The three-section structure of the ultrasonic knife 32 of special size is set. On the basis of avoiding the ultrasonic knife 32 from breaking during high-frequency cutting, the structure is more reasonable, and the shape, structure and size of each part can be set in sections, which is more conducive to cutting.

[0109] Optional, reference Figure 1 and Figure 5 The knife seat 321 includes a first surface 3211 and a second surface 3212 opposite to each other in the thickness direction Y, and there is a first angle between the first surface 3211 and the second surface 3212, the first angle is 8°-10°, and the thickness of the knife seat 321 gradually decreases from the end connected to the ultrasonic mechanism 31 to the end away from the ultrasonic mechanism 31.

[0110] The thickness of the end of the blade holder 321 connected to the amplitude converter 313 of the ultrasonic mechanism 31 is the thickest, and the thickness gradually decreases as it gradually moves away from the amplitude converter 313 along the length direction Z. The thickness of the blade body 322 is not greater than the thickness of the end of the blade holder 321 away from the ultrasonic mechanism 31, and the thickness of the blade tip 323 is not greater than the thickness of the end of the blade body 322 away from the blade holder 321. In this way, the ultrasonic blade 32 forms a gradually thinning structure from the blade holder 321 to the blade tip 323, which is convenient for cutting a thinner adhesive layer 220.

[0111] The first angle is 8°-10°, and can be specifically 8°, 9°, 10°, etc., without limitation. In this way, the thickness reduction is reasonable, and when the angle range is met, the ultrasonic knife 32 is not easy to break.

[0112] Optional, reference Figure 1 and Figure 5 The blade body 322 includes a main body 3221, a first blade portion 3222, a second blade portion 3223 and a third blade portion 3224. The main body 3221 is connected to one end of the blade holder 321 away from the ultrasonic mechanism 31, the first blade portion 3222 is connected to one end of the main body 3221 away from the blade holder 321, the second blade portion 3223 is connected to one side of the main body 3221 in the width direction X of the ultrasonic blade 32, and the third blade portion 3224 is connected to the other side of the main body 3221 in the width direction X of the ultrasonic blade 32. The blade angles of the first blade portion 3222, the second blade portion 3223 and the third blade portion 3224 are all 8°-10°.

[0113] When the ultrasonic knife 32 cuts the adhesive layer 220, on the one hand, it cuts inward from the surface of the adhesive layer 220 along the length direction Z of the ultrasonic knife 32, and on the other hand, it cuts from one end of the adhesive layer 220 in the length direction X (i.e., the length direction X of the battery 210) to the other end along the width direction X of the ultrasonic knife 32. During the initial cutting, the tip 323 first cuts the adhesive layer 220 at its own height Z. After cutting to a certain depth, the blade 322 will also cut the adhesive layer 220 in its own width direction X. Therefore, the blade angles of the first blade portion 3222, the second blade portion 3223 and the third blade portion 3224 of the blade body 322 are all 8°-10°. The blade angle can be specifically 8°, 9°, 10°, etc., without limitation. In this way, a relatively sharp structure is formed, which is conducive to cutting the adhesive layer 220.

[0114] Optional, reference Figure 5The blade tip 323 includes a fourth blade portion 3231, a fifth blade portion 3232 and a sixth blade portion 3233. The fourth blade portion 3231 is connected to one end of the blade body 322 away from the blade seat 321, the fifth blade portion 3232 is connected to one side of the fourth blade portion 3231 in the width direction X of the ultrasonic blade 32, and the sixth blade portion 3233 is connected to the other side of the fourth blade portion 3231 in the width direction X of the ultrasonic blade 32. The blade angles of the fourth blade portion 3231, the fifth blade portion 3232 and the sixth blade portion 3233 are all 8°-10°.

[0115] The length of the blade tip 323 (i.e., the dimension along the extension direction Z of the first axis A) is smaller than the width. Similar to the blade body 322, the blade tip 323 needs to cut along the depth direction Z and the length direction X of the adhesive layer 220. Therefore, the blade angles of the fourth blade portion 3231, the fifth blade portion 3232 and the sixth blade portion 3233 are all set to 8°-10°. The blade angle can be specifically 8°, 9°, 10°, etc. without limitation. In this way, a sharper structure is formed, which is conducive to cutting the adhesive layer 220.

[0116] In addition, the width of the end of the ultrasonic knife 32 away from the ultrasonic mechanism 31 is the width of the end of the blade tip 323 away from the blade body 322, and the thickness of the end of the ultrasonic knife 32 away from the ultrasonic mechanism 31 is the thickness of the end of the blade tip 323 away from the blade body 322.

[0117] Optional, reference Figure 5 The blade seat 321 is provided with a first blade groove 3213, which is located in the middle of the blade seat 321 and extends along the length direction Z of the ultrasonic blade 32; the blade body 322 is provided with a second blade groove 3225, which is located in the middle of the blade body 322 and extends along the length direction Z of the ultrasonic blade 32. The first blade groove 3213 and the second blade groove 3225 may or may not penetrate the thickness direction Y of the ultrasonic blade 32, and the length and width of the first blade groove 3213 and the second blade groove 3225 are not limited. The first blade groove 3213 and the second blade groove 3225 are provided to avoid high-frequency vibration fracture.

[0118] The structure and first angle of the blade seat 321 set above, the structure and blade angle of the main body 3221, the first blade portion 3222, the second blade portion 3223 and the third blade portion 3224 of the blade body 322, the structure and blade angle of the fourth blade portion 3231, the fifth blade portion 3232 and the sixth blade portion 3233 of the blade tip 323, and the structure of the first blade groove 3213 and the second blade groove 3225 can avoid breakage during high-frequency vibration of the ultrasonic blade 32, and meet the requirements of cutting the ultra-thin adhesive layer 220 to achieve disassembly of the battery module 200.

[0119] The ultrasonic knife 32 currently in use is very short in length. If it is simply extended in length and reduced in thickness, it will break during high-frequency vibration. Therefore, it cannot be used in the disassembly of the battery module 200. The specially designed ultrasonic knife 32 in the embodiment of the present invention can meet the needs of disassembly of the battery module 200 without breaking.

[0120] Please refer to Figure 6 , and combined with Figures 1 to 5 The embodiment of the present invention further provides a battery disassembly method, which uses the battery disassembly device 100 in the embodiment of the present invention to cut the battery module 200, wherein the battery module 200 includes a plurality of batteries 210 arranged in sequence in the thickness direction Y, and two adjacent batteries 210 are bonded by an adhesive layer 220, and the two ends of the battery module 200 in the height direction Z are also bonded with an adhesive layer 220.

[0121] Battery disassembly methods include:

[0122] S10, clamping and fixing the battery module 200.

[0123] S20 , driving the ultrasonic knife 32 to move to just above the glue layer 220 between adjacent batteries 210 through the moving assembly 10 .

[0124] S30 , using the ultrasonic knife 32 to cut a cut on the glue layer 220 in the height direction Z of the battery module 200 , where the cut corresponds to the glue layer 220 between adjacent batteries 210 .

[0125] Among them, in S10, after the battery module 200 is removed from the battery pack, it can be placed on the disassembly platform, and the disassembly platform can also be provided with a fixing structure such as a clamp to clamp and fix the battery module 200. After the battery module 200 is clamped and fixed, one side of the width direction Z of the multiple batteries 210 in the battery module 200 faces the disassembly platform, and the other side faces the ultrasonic knife 32 above, so that the glue layer 220 between adjacent batteries 210 can be cut from top to bottom in the direction of gravity, and the ultrasonic knife 32 can cut the glue layer 220 between adjacent batteries 210 from top to bottom along the direction of gravity.

[0126] In S20 , the moving assembly 10 may be moved by translation, lifting, rotation, etc., so as to reach directly above the glue layer 220 between adjacent batteries 210 .

[0127] In S30, during cutting, the ultrasonic knife 32 descends and starts cutting after having a micron-level spacing with the glue layer 220 covering the upper end surface of the battery module 200, and the glue layer 220 is cut out of the starting point of the cut through the high-frequency vibration of the ultrasonic knife 32. Then, the ultrasonic knife 32 moves along the length direction X of the battery module 200, that is, the ultrasonic knife 32 moves along its own width direction X, thereby cutting a cut through the glue layer 220 from one end to the other end.

[0128] The purpose of cutting the cut in this embodiment is to locate the cutting position and to make the cut so as to facilitate further cutting along the position of the cut. The cut is a long strip groove, and the width of the cut (i.e., the distance between the two opposite side walls of the groove) can also be approximately 0.08mm-0.18mm. The depth of the cut is not limited. According to the above description, when the ultrasonic knife 32 cuts, the glue of the glue layer 220 is not cut off, but the glue layer 220 is squeezed to both sides by high-frequency vibration, that is, the glue layer 220 will not have debris falling off, and will not pollute the environment and affect the health of the operator.

[0129] The battery disassembly method provided in this embodiment adopts the battery disassembly device 100 of the embodiment of the present invention and uses the ultrasonic knife 32 to cut the glue layer 220. It can accurately cut the cuts corresponding to the glue layer 220 between the batteries 210 and 210. Compared with the currently used glue removal solvent method and destructive mechanical cutting method, it overcomes the defects of the current solution such as environmental pollution, low efficiency, high energy consumption and high cost.

[0130] Optional, reference Figure 1 and Figure 6 In S20, the ultrasonic knife 32 is driven by the moving component 10 to move to the top of the glue layer 220 between the adjacent batteries 210, including:

[0131] The position of the battery module 200 is determined by the positioning assembly 20, and the position of the adhesive layer 220 between the battery 210 and the adjacent battery 210 is determined according to the exposed batteries 210 at both ends in the length direction X of the battery module 200;

[0132] The ultrasonic knife assembly 30 is driven to move by the moving assembly 10 , and the positioning assembly 20 detects the position of the ultrasonic knife 32 in real time until the ultrasonic knife 32 moves to just above the glue layer 220 between adjacent batteries 210 .

[0133] Among them, according to the above description, the two ends of the battery module 200 in the length direction X of the battery 210 are not covered by the glue layer 220, so the position of the battery 210 and the battery 210 can be clearly captured by the camera 21 of the positioning component 20, and the position of the glue layer 220 between the battery 210 and the battery 210 can be obtained. Then, the ultrasonic knife 32 is moved by the moving component 10, and the positioning component 20 detects the position of the ultrasonic knife 32 in real time, so that the relative position of the ultrasonic knife 32 and the battery module 200 can be positioned. The relevant content can be referred to the above description, which will not be repeated here.

[0134] Optional, reference Figure 1 and Figure 6In S30, a cut is made on the adhesive layer 220 in the height direction Z of the battery module 200 by using an ultrasonic knife 32, including:

[0135] After cutting a notch at one end of the battery module 200 in the height direction Z, the battery module 200 is turned over, and another notch is cut at the other end of the battery module 200 in the height direction Z, and the two notches correspond to the same adhesive layer 220 between two adjacent batteries 210;

[0136] One of the two cuts in the height direction Z of the battery module 200 is selected, and the ultrasonic knife 32 is used to continue cutting along the cut to deepen the cut.

[0137] To flip the battery module 200, the clamps on the disassembly platform can be loosened first, and then the battery module 200 can be flipped over by other tools. A shallow cut is made at each end of the battery module 200 in the height direction Z, and its function is to position the battery module 200 at both ends in the height direction Z to ensure that the cutting is carried out along the positioned position during cutting to avoid cutting the battery 210. On the basis of a shallow cut, a deeper cut is made, which can facilitate the subsequent cutting of the glue layer 220 in the height direction Z of the battery module 200 by other means. Among them, the depth of the deepened cut can reach about 10mm.

[0138] Optionally, in one embodiment, the battery disassembly method further includes: switching the ultrasonic knife 32 to a ceramic knife (not shown), and using the ceramic knife to continue cutting along the deepened cut until two adjacent batteries 210 are separated.

[0139] The ultrasonic knife 32 of the embodiment of the present invention is used to cut a mark instead of completely cutting through the glue layer 220. This is because the length of the ultrasonic knife 32 cannot reach the length to completely cut through the glue layer 220, and the thickness of the ultrasonic knife 32 cannot be made very thin over a long length, which is technically impossible at this stage. After the ultrasonic knife 32 is used to cut a mark, the deepened mark has penetrated into the glue layer 220 between the batteries 210 and the batteries 210. The ceramic knife can be used to continue cutting to achieve cutting through the glue layer 220 and separate the batteries 210.

[0140] The ceramic knife has a high structural strength and can be made very thin. On the basis of the accurate cuts made by the ultrasonic knife 32, the ceramic knife continues to cut the glue layer 220, so as to cut through the glue layer 220 and separate the battery 210. In addition, the ceramic knife is insulated, and even if it contacts the battery 210, there will be no danger of short circuit, etc., so safety can be ensured.

[0141] Optionally, the ceramic knife can be connected to the ultrasonic knife 32 at the same position, and the ultrasonic knife 32 can be converted into a ceramic to cut the glue layer 220 by rotating, translating, etc., without specific limitation.

[0142] Optionally, after switching to a ceramic knife for cutting, the cutting position may be heated to melt the adhesive layer 220, thereby helping to reduce the resistance of the ceramic knife in cutting.

[0143] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element 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.

[0144] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An ultrasonic scalpel, characterized in that: The ultrasonic knife is suitable for cutting the glue layer. The ultrasonic knife is suitable for being connected to one end of the axial direction of the ultrasonic mechanism. The ultrasonic mechanism is suitable for converting ultrasonic signals into mechanical vibrations. The length direction of the ultrasonic knife is the axial direction of the ultrasonic mechanism; the ultrasonic knife satisfies: 0.3λ≤L≤0.8λ; Wherein, L is the length of the ultrasonic knife, and λ is the wavelength of the mechanical vibration provided by the ultrasonic mechanism.

2. The ultrasonic scalpel according to claim 1, characterized in that: The ultrasonic mechanism is rotationally symmetrical about the first axis, and the ultrasonic knife also satisfies: (1 / 2)R≤W≤(2 / 3)R; Wherein, R is the maximum diameter of the ultrasonic mechanism, and W is the width of the end of the ultrasonic knife away from the ultrasonic mechanism.

3. The ultrasonic scalpel according to claim 1, characterized in that: The ultrasonic knife also meets the following requirements: 0.08mm≤D≤0.18mm; Wherein, D is the thickness of the end of the ultrasonic knife away from the ultrasonic mechanism.

4. The ultrasonic scalpel according to claim 1, characterized in that: The ultrasonic knife comprises a knife seat, a knife body and a knife tip, wherein the knife seat is suitable for connecting with the ultrasonic mechanism, and the knife seat, the knife body and the knife tip are connected in sequence in a direction away from the ultrasonic mechanism, satisfying: L1=L2, and L1+L2=L; Wherein, L1 is the length of the knife seat, and L2 is the total length of the knife body and the knife tip.

5. The ultrasonic scalpel according to claim 4, characterized in that: The knife seat includes a first surface and a second surface opposite to each other in the thickness direction, a first angle is formed between the first surface and the second surface, the first angle is 8°-10°, and the thickness of the knife seat gradually decreases from the end connected to the ultrasonic mechanism to the end away from the ultrasonic mechanism.

6. The ultrasonic scalpel according to claim 4, characterized in that: The blade body includes a main body, a first blade portion, a second blade portion and a third blade portion, the main body is connected to an end of the blade holder away from the ultrasonic mechanism, the first blade portion is connected to an end of the main body away from the blade holder, the second blade portion is connected to one side of the main body in the width direction of the ultrasonic blade, and the third blade portion is connected to the other side of the main body in the width direction of the ultrasonic blade, and the blade angles of the first blade portion, the second blade portion and the third blade portion are all 8°-10°.

7. The ultrasonic scalpel according to claim 4, characterized in that: The blade tip includes a fourth blade portion, a fifth blade portion and a sixth blade portion, the fourth blade portion is connected to one end of the blade body away from the blade seat, the fifth blade portion is connected to one side of the fourth blade portion in the width direction of the ultrasonic blade, and the sixth blade portion is connected to the other side of the fourth blade portion in the width direction of the ultrasonic blade, and the blade angles of the fourth blade portion, the fifth blade portion and the sixth blade portion are all 8°-10°.

8. The ultrasonic scalpel according to claim 4, characterized in that: The blade seat is provided with a first blade groove, which is located in the middle of the blade seat and extends along the length direction of the ultrasonic blade; the blade body is provided with a second blade groove, which is located in the middle of the blade body and extends along the length direction of the ultrasonic blade.

9. An ultrasonic knife assembly, characterized in that: include: An ultrasonic mechanism adapted to convert an ultrasonic signal into mechanical vibrations; The ultrasonic knife according to any one of claims 1 to 8 is connected to one end of the ultrasonic mechanism in the axial direction, and the ultrasonic knife is suitable for cutting the glue layer.

10. The ultrasonic knife assembly according to claim 9, characterized in that: The ultrasonic mechanism is rotationally symmetrical around a first axis, and comprises a generator joint, a transducer and an amplitude converter which are sequentially connected along an extending direction of the first axis, and an end of the amplitude converter away from the transducer is connected to the ultrasonic knife.

11. A battery disassembly device, characterized in that: Suitable for cutting the adhesive layer of battery modules, including: Mobile components; The ultrasonic scalpel assembly as described in claim 9 or 10, wherein the ultrasonic scalpel assembly is connected to the moving assembly, and the moving assembly is used to drive the ultrasonic scalpel assembly to move.

12. The battery disassembly device according to claim 11, characterized in that: The battery disassembly device also includes a positioning component, which is connected to the moving component and is used to determine the cutting starting position and cutting path of the ultrasonic knife.

13. The battery disassembling device according to claim 12, characterized in that: The positioning component includes a camera and a trajectory identifier, the camera is suitable for capturing images, and the trajectory identifier is suitable for monitoring the cutting starting position of the ultrasonic knife and the movement trajectory of the ultrasonic knife based on the images.

14. The battery disassembling device according to claim 13, characterized in that: The positioning component also includes a path analyzer, which is suitable for being electrically connected to the batteries of the battery module and for alarming when the ultrasonic knife cuts into the batteries in the battery module.

15. The battery disassembling device according to claim 11, characterized in that: It also includes a floating mechanism, which connects the moving component and the ultrasonic knife component, and the floating mechanism is suitable for telescopic movement to make the ultrasonic knife component and the moving component approach or move away from each other.

16. A battery disassembly method, characterized in that: The battery disassembly method uses the battery disassembly device according to any one of claims 11 to 15 to cut the battery module, wherein the battery module comprises a plurality of batteries arranged in sequence in the thickness direction, two adjacent batteries are bonded by an adhesive layer, and both ends of the battery module in the height direction are also bonded with an adhesive layer; The battery disassembly method comprises: Clamp and fix the battery module; The ultrasonic knife is driven by the moving component to move to the top of the glue layer between the adjacent batteries; The ultrasonic knife is used to cut a cut on the glue layer in the height direction of the battery module, and the cut corresponds to the glue layer between adjacent batteries.

17. The battery disassembly method according to claim 16, characterized in that: The ultrasonic knife is driven to move to the top of the glue layer between the adjacent batteries by the moving component, including: Determine the position of the battery module by a positioning component, and determine the position of the glue layer between the battery and the adjacent battery according to the batteries exposed at both ends in the length direction of the battery module; The ultrasonic knife assembly is driven to move by the moving assembly, and the positioning assembly detects the position of the ultrasonic knife in real time until the ultrasonic knife moves to just above the glue layer between the adjacent batteries.

18. The battery disassembly method according to claim 16, characterized in that: Cutting a cut on the glue layer in the height direction of the battery module by using the ultrasonic knife includes: After cutting a notch at one end of the battery module in the height direction, flipping the battery module, and cutting another notch at the other end of the battery module in the height direction, the two notches correspond to the same glue layer between two adjacent batteries; One of the two cuts in the height direction of the battery module is selected, and the ultrasonic knife is used to continue cutting along the cut to deepen the cut.

19. The battery disassembly method according to claim 18, characterized in that: Also includes: The ultrasonic knife is switched to a ceramic knife, and the ceramic knife is used to continue cutting along the deepened cut until the two adjacent batteries are separated.

Images