Battery pole piece stripping device and method

Abstract

The invention relates to a battery pole piece stripping device and method. The device comprises a feeding module used for feeding a battery pole piece to be stripped into a stripping module; the stripping module comprises a first crane, a swing motor, a swing hanging arm, a liquid tank, a stripping inner frame and an overturning assistance motor; the stripping inner frame is arranged in the liquid tank, and the first crane is connected with the stripping inner frame through a swing hanging arm to control the stripping inner frame to move in the depth direction of the liquid tank; the swinging motor drives the stripping inner frame to move along an arc line through the swinging hanging arm; the dehydration module comprises a pressing plate lifting motor, a dehydration pressing plate and a dehydration platform; the pressing plate lifting motor is used for controlling the dewatering pressing plate to apply pressure to the stripped battery pole piece in the stripping inner frame; and the overturning assisting motor is used for controlling the dehydrated battery pole piece in the stripped inner frame to be overturned and poured out. The device is high in automation degree, and manpower investment can be effectively reduced; the use of acid and alkali and high-temperature sintering in the traditional method are avoided, the process cost is reduced, and the cleanliness of the material is improved.

Description

Technical Field

[0001] This application relates to the field of battery electrode recycling technology, and in particular to a battery electrode stripping device and method. Background Technology

[0002] With the development of battery electrode recycling technology, a short-process direct repair technology has emerged. This technology directly repairs the materials in the battery by modifying their composition, morphology, and structure, restoring them to a level of performance close to that of new materials, thus avoiding conventional pyrometallurgical and hydrometallurgical approaches.

[0003] However, the prerequisite for short-process direct repair technology is to cleanly and efficiently peel the material to be repaired off the battery electrode. Currently, the common peeling method in the industry is calcination plus mechanical pulverization, which has the problem of low purity and cleanliness of the peeled material. Summary of the Invention

[0004] Therefore, it is necessary to provide a battery electrode stripping device and method that can efficiently improve the purity and cleanliness of the stripped material, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides a battery electrode stripping device, comprising:

[0006] The feeding module is used to feed the battery electrode sheets to be stripped into the stripping module;

[0007] The stripping module includes a first overhead crane, a swing motor, a swing arm, a liquid tank, a stripping inner frame, and a tilting assist motor. The stripping inner frame is placed inside the liquid tank. The first overhead crane and the stripping inner frame are connected by the swing arm. The first overhead crane controls the movement of the stripping inner frame in the depth direction of the liquid tank. The swing motor is used to drive the stripping inner frame to move along an arc through the swing arm. Liquid flow holes are provided on the stripping inner frame.

[0008] The dehydration module includes a pressure plate lifting motor, a dehydration pressure plate, and a dehydration platform; liquid flow holes are provided on the contact surface between the dehydration platform and the inner peeling frame; the pressure plate lifting motor is used to control the dehydration pressure plate to apply pressure to the peeled battery electrode sheets inside the inner peeling frame;

[0009] The flip-assisted motor is used to control the flipping and dumping of the dehydrated battery electrodes inside the inner frame.

[0010] In one embodiment, the feeding module is a second crane or a feeding track.

[0011] Secondly, this application also provides a method for peeling off battery electrodes, comprising:

[0012] The feeding module is controlled to move at a relatively uniform speed relative to the inner frame of the stripping, so as to throw the battery electrode sheets to be stripped into the inner frame of the stripping.

[0013] The first row of cranes drives the swing arm to immerse the stripped inner frame into the aqueous liquid in the liquid tank.

[0014] The swing arm is driven by a swing motor to control the inner frame of the peeling device to move in an arc within the liquid tank.

[0015] The first row of cranes drives the swing arm to control the inner frame to detach from the surface of the water-based liquid in the liquid tank for drainage;

[0016] The first row of cranes drives the swing arm to move the inner stripping frame onto the dewatering platform;

[0017] The dehydration pressure plate is driven by the pressure plate lifting motor to control the dehydration pressure plate to apply pressure to the peeled battery electrode sheets inside the peeling inner frame to dehydrate them;

[0018] The dehydrated battery electrodes inside the inner frame are flipped out by a rotating assist motor.

[0019] In one embodiment, the liquid-to-material ratio between the battery electrode to be stripped in the inner frame and the aqueous liquid in the liquid tank is 0.5:1 to 10:1, with the liquid-to-material ratio in kg / L.

[0020] In one embodiment, the temperature of the aqueous liquid is controlled between 0 and 100 degrees Celsius.

[0021] In one embodiment, the battery electrode to be stripped is immersed in an aqueous liquid for 1 to 60 minutes.

[0022] In one embodiment, the oscillation amplitude of the arc motion is ±45 degrees.

[0023] In one embodiment, the pressure applied by the dehydration pressure plate driven by the pressure plate lifting motor is 0 to 1 MPa.

[0024] In one embodiment, the pressure application time of the dehydration pressure plate driven by the pressure plate lifting motor is 0 to 60 minutes.

[0025] In one embodiment, the pressing surface shape of the dehydration plate is consistent with the opening shape of the peeling inner frame.

[0026] The aforementioned battery electrode peeling device and method include a feeding module for feeding the battery electrodes to be peeled into the peeling module; the peeling module includes a first overhead crane, a swing motor, a swing arm, a liquid tank, an inner peeling frame, and a tilting assist motor; the inner peeling frame is placed in the liquid tank, and the first overhead crane and the inner peeling frame are connected by the swing arm, with the first overhead crane controlling the movement of the inner peeling frame in the depth direction of the liquid tank; the swing motor drives the inner peeling frame to move along an arc via the swing arm; liquid flow holes are provided on the inner peeling frame; the dehydration module includes a pressure plate lifting motor, a dehydration pressure plate, and a dehydration platform; liquid flow holes are provided on the contact surface between the dehydration platform and the inner peeling frame; the pressure plate lifting motor controls the dehydration pressure plate to apply pressure to the peeled battery electrodes inside the inner peeling frame; and the tilting assist motor controls the tilting and pouring out of the dehydrated battery electrodes inside the inner peeling frame. The wet peeling method used in the peeling module avoids the inclusion of impurities such as current collectors (aluminum foil / copper foil) and plastic packaging into the active material after being crushed during the powdering process, thus improving the purity and cleanliness of the material. In addition, the modules are highly automated, both between modules and within the modules themselves, reducing the need for manpower. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a structural block diagram of a battery electrode stripping device in one embodiment;

[0029] Figure 2 This is a schematic diagram of the battery electrode stripping device in one embodiment;

[0030] Figure 3 This is a schematic flowchart of a battery electrode stripping method in one embodiment.

[0031] Explanation of reference numerals in the attached drawings: 101, feeding module; 1011, second overhead crane; 1012, feeding track; 102, stripping module; 1021, first overhead crane; 1022, swing motor; 1023, swing arm; 1024, liquid tank; 1025, stripping inner frame; 1026, tilting assist motor; 1027, liquid flow hole; 103, dewatering module; 1031, pressure plate lifting motor; 1032, dewatering pressure plate; 1033, dewatering platform; 1034, liquid flow hole. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0034] In one embodiment, such as Figure 1 , 2 As shown, a battery electrode stripping device is provided, comprising:

[0035] Feeding module 101 is used to feed the battery electrode sheets to be stripped into the stripping module 102;

[0036] The peeling module 102 includes a first overhead crane 1021, a swing motor 1022, a swing arm 1023, a liquid tank 1024, a peeling inner frame 1025, and a tilting assist motor 1026. The peeling inner frame 1025 is placed inside the liquid tank 1024. The first overhead crane 1021 and the peeling inner frame 1025 are connected by the swing arm 1023. The first overhead crane 1021 controls the peeling inner frame 1025 to move in the depth direction of the liquid tank 1024. The swing motor 1022 is used to drive the peeling inner frame 1025 to move along an arc through the swing arm 1023. The peeling inner frame 1025 is provided with liquid flow holes 1027.

[0037] The dehydration module 103 includes a pressure plate lifting motor 1031, a dehydration pressure plate 1032, and a dehydration platform 1033; liquid flow holes 1034 are provided on the contact surface between the dehydration platform 1033 and the inner peeling frame 1025; the pressure plate lifting motor 1031 is used to control the dehydration pressure plate 1032 to apply pressure to the peeled battery electrode sheets inside the inner peeling frame 1025;

[0038] The flipping assist motor 1025 is used to control the flipping and dumping of the dehydrated battery electrode sheets inside the inner frame 1025.

[0039] Specifically, the feeding module 101 is used to feed the battery electrode sheets to be stripped (ternary positive or negative electrode sheets, lithium iron phosphate positive or negative electrode sheets, etc.) into the stripping module 102.

[0040] The stripping module 102 is the core component of the entire system. The inner stripping frame 1025 is placed within a liquid tank 1024, which is made of a material including stainless steel, ceramic, engineering plastic, or titanium alloy. The first gantry crane 1021 is connected to a crossbeam, at both ends of which two swing wall hangers 1023 suspend the inner stripping frame 1025. The first gantry crane 1021 controls the movement of the inner stripping frame 1025 along the depth direction of the liquid tank 1024. Moving it downwards gradually immerses the inner stripping frame 1025 in the liquid within the tank 1024, while moving it upwards gradually detaches it from the liquid surface.

[0041] Since both ends of the inner peeling frame 1025 are connected to the crossbeam via a swing arm 1023, when the swing motor 1022 drives the crossbeam to swing left and right, the swing arm 1023 swings accordingly, thereby causing the inner peeling frame 1025 to swing left and right. The inner peeling frame 1025 is provided with a liquid flow hole 1027, allowing liquid in the liquid tank 1024 to flow into the inner peeling frame 1025 through the liquid flow hole 1027, ensuring sufficient contact between the liquid flow and the battery electrode sheets. The arc-shaped motion enhances the peeling effect of the liquid flow on the battery electrode sheets, achieving separation of the material on the battery electrode sheets from the current collector. The first crane 1021 controls the inner peeling frame 1025 to move upwards, lifting the inner peeling frame 1025 to drain water and transfer it to the dehydration module 103.

[0042] The dehydration module 103 includes a pressure plate lifting motor 1031, a dehydration pressure plate 1032, and a dehydration platform 1033. Liquid flow holes 1034 are provided on the contact surface between the dehydration platform 1033 and the inner peeling frame 1025, allowing liquid in the inner peeling frame 1025 to flow out further through the liquid flow holes 1034 for further dehydration. The pressure plate lifting motor 1031 controls the dehydration pressure plate 1032 to apply pressure to the peeled battery electrode sheets inside the inner peeling frame 1025, pressing and dehydrating the material and current collector on the peeled battery electrode sheets. The pressed-out liquid can flow out through the liquid flow holes 1034. After completing the pressing and dehydration, the pressure plate lifting motor 1031 can also drive the inner peeling frame 1025 to transport it to the next station. After being transported to the next station, the dehydrated battery electrode sheets inside the inner peeling frame 1025 can be flipped and dumped out by a tilting assist motor.

[0043] In the above embodiments, the battery electrode sheets are peeled off using a wet method via the peeling module 102. This avoids impurities such as current collectors (aluminum / copper foil) and plastic packaging from being crushed and mixed into the active material during the powdering process, thus improving material purity and cleanliness. Furthermore, the oscillation process ensures that the battery electrode sheets are subjected to a more uniform force during peeling. This uniform force helps to more effectively break the adhesion between the active material and the current collector, resulting in more efficient peeling. Compared to some localized force-based peeling methods, it reduces the possibility of incomplete or excessive peeling in certain areas due to uneven force. Additionally, because the force applied during the oscillation process is relatively gentle and uniform, unlike mechanical crushing or forceful tearing methods that generate significant localized stress on the current collector, it can reduce damage to the current collector to a certain extent, helping to maintain its integrity and performance. This allows for better reuse of the recycled current collector, reducing production costs and improving resource recycling rates. Simultaneously, the uniform peeling process ensures that the active material maintains a relatively intact particle shape when detached from the current collector, reducing breakage and pulverization of the active material. The amplitude, frequency, and length of the swing arm in the above swing process can all be optimized, thus exhibiting strong process adaptability and flexibility.

[0044] Finally, by combining the feeding structure, the oscillating structure, and the dewatering structure, it is relatively easy to achieve automated control and continuous production, which facilitates large-scale industrial application, reduces labor costs, and improves the stability and consistency of production.

[0045] In one embodiment, the feeding module 101 is a second overhead crane 1011 or a feeding track 1012.

[0046] For the second row of cranes 1011, the second row of cranes 1011 can lift the battery electrode material to be peeled and make a uniform parallel movement, and evenly throw the battery electrode material to be peeled into the peeling inner frame 1025.

[0047] For the feeding track 1012, the battery electrode material to be peeled is first evenly placed on the feeding track 1012. Then, the first crane 1021 lifts the peeling inner frame 1025 and makes a uniform parallel movement so that the battery electrode material is evenly thrown into the peeling inner frame 1025.

[0048] In the above embodiments, the battery electrode sheets can be uniformly sprayed into the inner frame 1025, which improves the local accumulation of battery electrode sheets in the inner frame 1025 and ensures that the battery electrode sheets are evenly distributed. This allows each battery electrode sheet to receive consistent processing conditions during subsequent peeling processes (such as full contact of the peeling agent during chemical peeling and uniform coverage by force / fluid action during physical peeling). At the same time, it adapts to the continuous production rhythm and improves peeling efficiency and material purity.

[0049] In one exemplary embodiment, such as Figure 3 As shown, a battery electrode stripping method is provided, which is applied to... Figure 1 The provided battery electrode stripping device. The method includes steps 302 to 306. Wherein:

[0050] 302. Control the feeding module 101 to move at a relatively uniform speed relative to the peeling inner frame 1025 so as to throw the battery electrode to be peeled into the peeling inner frame 1025.

[0051] Specifically, this refers to maintaining a stable, relatively uniform motion between the control feeding module 101 and the inner peeling frame 1025 in the equipment. Through this regular relative displacement, the battery electrode sheets to be peeled are evenly distributed inside the inner peeling frame 1025. This improves the localized accumulation of battery electrode sheets in the inner peeling frame 1025, ensuring a uniform distribution of the battery electrode sheets. This allows each battery electrode sheet to receive consistent processing conditions during subsequent peeling processes (such as full contact of the peeling agent during chemical peeling and uniform coverage under force / fluid action during physical peeling). It also adapts to continuous production rhythms, improving peeling efficiency and material purity.

[0052] 304. Drive the swing arm 1023 through the first crane 1021 to immerse the peeled inner frame 1025 into the aqueous liquid in the liquid tank 1024;

[0053] Specifically, the first overhead crane 1021 provides driving force, causing the swing arm 1023 to swing. Through the transmission action of the swing arm, the inner frame 1025, connected to the swing arm 1023, is smoothly immersed into the aqueous liquid contained in the liquid tank 1024. This ensures that the inner frame 1025 and the battery electrode sheets to be peeled are in complete contact with the aqueous liquid, laying the foundation for subsequent separation of materials from the current collector on the battery electrode sheets. Simultaneously, the cooperation between the first overhead crane 1021 and the swing arm 1023 allows for precise control of the immersion depth and speed, preventing battery electrode sheets from spilling or liquid from splashing, ensuring the stable operation of the peeling module process.

[0054] 306. The swing arm 1023 is driven by the swing motor 1022 to control the inner frame 1025 to move in an arc within the liquid tank 1024.

[0055] Specifically, the swing motor 1022 provides power to drive the connected swing arm 1023 to swing, thereby causing the inner peeling frame 1025 to move along an arc-shaped trajectory within the liquid tank 1024. This arc-shaped movement creates relative displacement and disturbance between the inner peeling frame 1025 and the battery electrode sheets to be peeled, and the aqueous liquid, enhancing the scouring and wetting effect of the liquid on the battery electrode sheets, accelerating the shedding of active materials from the battery electrode sheets, and preventing uneven peeling caused by localized accumulation of battery electrode sheets, thus improving overall peeling efficiency. The driving method of the swing motor 1022 can precisely control the amplitude and frequency of the movement, adapting to different battery electrode sheet materials and peeling process requirements.

[0056] 308. The first overhead crane 1021 drives the swing arm 1023 to control the inner frame 1025 to detach from the liquid surface of the water-based liquid in the liquid tank 1024 for drainage.

[0057] Specifically, the first gantry crane 1021 provides driving force, which drives the connected swing arm 1023 to operate, thereby controlling the inner frame 1025, which carries the peeled battery electrode sheets, to detach from the aqueous liquid in the liquid tank 1024 and leave the liquid surface. Using the liquid flow holes 1027 on the inner frame 1025 itself, excess aqueous liquid adhering to the surface of the battery electrode sheets and the inner frame 1025 naturally drips back into the liquid tank 1024, achieving drainage. This reduces liquid waste and creates conditions for subsequent collection, drying, or further processing of the battery electrode sheets.

[0058] 310. Drive the swing arm 1023 through the first crane 1021 to move the inner peeling frame 1025 onto the dewatering platform 1033;

[0059] Specifically, the first overhead crane 1021 provides power to drive the swing arm 1023 to swing or lift, thereby moving the inner frame 1025, which has completed liquid immersion and initial dewatering, precisely onto the dehydration platform 1033. This achieves process connection, transferring the inner frame 1025, carrying the peeled battery electrodes, from the liquid tank 1024 to the dehydration platform 1033, preparing for further removal of residual moisture from the battery electrodes. At the same time, the cooperation between the first overhead crane 1021 and the swing arm 1023 ensures the stability of the movement process, preventing the battery electrodes from falling or causing secondary contamination, and ensuring the orderly processing of the peeled battery electrodes.

[0060] 312. The dehydration pressure plate 1032 is driven by the pressure plate lifting motor 1031 to control the dehydration pressure plate 1032 to apply pressure to the peeled battery electrode sheet inside the peeling inner frame 1025 to dehydrate it.

[0061] Specifically, the pressure plate lifting motor 1031 provides power to drive the dehydration pressure plate 1032 to move up and down, thereby controlling the dehydration pressure plate 1032 to apply pressure towards the battery electrode sheets that have been peeled off inside the inner frame 1025. This mechanical pressure squeezes out excess watery liquid adsorbed inside the battery electrode sheets, quickly reducing the water content of the electrode sheets. Simultaneously, the motor precisely controls the pressure and application speed to avoid insufficient pressure leading to incomplete dehydration, ensuring the dehydration effect.

[0062] 314. The dehydrated battery electrode sheets inside the inner frame 1025 are flipped out by the flipping assist motor 1026.

[0063] Specifically, the tilting assist motor 1026 provides power to drive the inner frame 1025 to tilt, thereby pouring out the dehydrated battery electrode sheets inside. This achieves automatic discharge of battery electrode sheets, replacing manual material handling and improving the automation level of the process. At the same time, the tilting assist motor can precisely control the tilting angle, speed, and force of the inner frame to prevent the electrode sheets from spilling, being damaged, or remaining during the pouring process, ensuring that the electrode sheets can be transferred intact to the subsequent collection or further processing station, and ensuring a smooth connection of the process.

[0064] In the above embodiments, the feeding module 101 improves the local accumulation of battery electrodes in the peeling inner frame 1025, ensuring uniform distribution of battery electrodes. The peeling module 102 uses a wet method to peel the battery electrodes, which can avoid impurities such as current collectors (aluminum foil / copper foil) and plastic packaging from being crushed and mixed into the active material during the powdering process, thus improving the purity and cleanliness of the materials. In addition, since the above-mentioned oscillation process can subject the battery electrodes to a more uniform force during the peeling process, this uniform force distribution helps to more effectively break the adhesion between the active material and the current collector, thereby achieving more efficient peeling. Compared with some peeling methods with localized force, it can reduce the situation where some areas are not completely peeled or over-peeled due to uneven force distribution. Furthermore, since the force applied during the oscillation process is relatively gentle and uniform, unlike mechanical crushing or strong tearing peeling methods, it does not generate large local stress on the current collector, thus reducing damage to the current collector to a certain extent and helping to maintain the integrity and performance of the current collector. In this way, the recycled current collector can be better reused, reducing production costs and improving the resource recycling rate. Meanwhile, the uniform peeling process allows the active material to maintain a relatively intact particle shape when it detaches from the current collector, reducing breakage and pulverization of the active material. The amplitude, frequency, and length of the swing arm in the above-mentioned oscillation process can all be optimized, thus providing strong process adaptability and flexibility. Excess aqueous liquid adsorbed inside the battery electrode is squeezed out by mechanical pressure, rapidly reducing the water content of the electrode. At the same time, the pressure and speed can be precisely controlled by a motor to avoid incomplete dehydration due to insufficient pressure, ensuring the dehydration effect.

[0065] Finally, by combining the feeding structure, the oscillating structure, and the dewatering structure, it is relatively easy to achieve automated control and continuous production, which facilitates large-scale industrial application, reduces labor costs, and improves the stability and consistency of production.

[0066] In one embodiment, the liquid-to-material ratio between the battery electrode to be stripped in the inner frame 1025 and the aqueous liquid in the liquid tank 1024 is 0.5:1 to 10:1, and the liquid-to-material ratio is in kg / L.

[0067] In the above embodiments, if the liquid-to-solid ratio is too low, the aqueous liquid will not be able to fully wet the electrode, making it difficult to effectively break the adhesion and affecting the peeling efficiency; if the liquid-to-solid ratio is too high, it will cause waste of aqueous liquid, increasing the cost of subsequent liquid treatment and environmental pressure. By limiting the liquid-to-solid ratio to within 0.5:1 to 10:1, it is possible to ensure that the electrode and liquid are in full contact to achieve efficient peeling, while also reasonably controlling resource consumption.

[0068] In one embodiment, the temperature of the aqueous liquid is controlled between 0 and 100 degrees Celsius.

[0069] In the above embodiments, excessively low temperatures reduce the activity of the aqueous liquid, slowing down the dissolution of the binder or the breakdown of interfacial forces, thus affecting the peeling efficiency. Excessively high temperatures may cause the aqueous liquid to evaporate too quickly, increasing material loss and process control difficulties, and may also adversely affect the structure of the electrode active material, even exceeding the temperature control capabilities of conventional equipment. Limiting the temperature within this range ensures that the aqueous liquid possesses sufficient reactivity to support efficient peeling, while avoiding the process risks and increased costs associated with extreme temperatures.

[0070] In one embodiment, the battery electrode to be stripped is immersed in an aqueous liquid for 1 to 60 minutes.

[0071] In the above embodiments, if the soaking time is too short, the peeling will be incomplete, affecting the subsequent material separation effect; if the soaking time is too long, it will reduce production efficiency, increase time costs, and may also cause unnecessary chemical reactions in the electrode active material due to prolonged soaking, affecting its recycling value. Limiting the soaking time within this range ensures that the aqueous liquid can exert a sufficient peeling effect while taking into account the efficiency of industrial production and material quality, adapting to the peeling process requirements of different types of battery electrodes.

[0072] In one embodiment, the oscillation amplitude of the arc motion is ±45 degrees.

[0073] In the above embodiment, the swing arm 1023 drives the inner frame 1025 to swing to both sides at a maximum angle of 45 degrees, with the position of gravity as the reference point. The overall swing angle covers the range from 45 degrees to the left and 45 degrees to the right of the reference point. This allows sufficient relative movement between the inner frame 1025 and the battery electrode sheets inside and the aqueous liquid. This ensures that the liquid can fully wash and wet the electrode sheets, accelerate the dissolution of the adhesive and the shedding of the active material, and improve the uniformity of the peeling. At the same time, it avoids excessive swing amplitude, which could cause the battery electrode sheets to collide with the inner frame 1025 and be damaged, or cause liquid splashing, or exceed the structural limitations of the equipment and cause malfunctions.

[0074] In one embodiment, the pressure applied by the pressure plate lifting motor 1031 driving the dehydration pressure plate 1032 is 0 to 1 MPa.

[0075] In the above embodiments, limiting the pressure within this range can both accelerate the removal of moisture by applying appropriate pressure and shorten the subsequent drying time, and ensure that the electrode maintains its structural integrity during the dehydration process, thus providing quality assurance for subsequent recycling or further processing.

[0076] In one embodiment, the pressure plate lifting motor 1031 drives the dehydration pressure plate 1032 to apply pressure for 0 to 60 minutes.

[0077] In the above embodiments, the pressure application time is limited to this range, which can be flexibly adjusted according to the moisture content and material characteristics of the battery electrode. This ensures that the ideal dehydration effect is achieved while also taking into account production efficiency, thus meeting the actual needs of industrial dehydration processes.

[0078] In one embodiment, the pressing surface shape of the dehydration plate 1032 is consistent with the opening shape of the peeling inner frame 1025.

[0079] In the above embodiments, when the dehydration pressure plate 1032 applies pressure to the battery electrode sheet inside the peeling inner frame 1025, the pressing surface that conforms to the shape of the opening of the peeling inner frame 1025 can fully cover the battery electrode sheet area, avoiding local insufficient pressure or pressure concentration, ensuring that all battery electrode sheets can be fully squeezed and dehydrated, and improving the overall dehydration effect.

[0080] In one embodiment, it is a specific battery electrode stripping device.

[0081] The feeding module 101 is used to feed the battery electrode sheets to be stripped (ternary positive or negative electrode sheets, lithium iron phosphate positive or negative electrode sheets, etc.) into the stripping module 102. The feeding module 101 is either the second crane 1011 or the feeding track 1012.

[0082] For the second crane 1011, the second crane 1011 lifts the battery electrode material to be peeled and moves it in a uniform parallel motion, and evenly throws the battery electrode material to be peeled into the peeling inner frame 1025.

[0083] For the feeding track 1012, the battery electrode material to be peeled is first evenly placed on the feeding track 1012. Then, the first crane 1021 lifts the peeling inner frame 1025 and makes a uniform parallel movement so that the battery electrode material is evenly thrown into the peeling inner frame 1025.

[0084] For the second crane 1011, the second crane 1011 lifts the battery electrode material to be peeled and moves it in a uniform parallel motion, and evenly throws the battery electrode material to be peeled into the peeling inner frame 1025.

[0085] For the feeding track 1012, the battery electrode material to be peeled is first evenly placed on the feeding track 1012. Then, the first crane 1021 lifts the peeling inner frame 1025 and makes a uniform parallel movement so that the battery electrode material is evenly thrown into the peeling inner frame 1025.

[0086] The stripping module 404 is the core part of the entire system, including the first overhead crane 1021, the swing motor 1022, the swing arm 1023, the liquid tank 1024, the stripping inner frame 1025, and the tilting assist motor 1026. The stripping inner frame 1025 is placed in the liquid tank 1024. The liquid tank 1024 is made of one of stainless steel, ceramic, engineering plastic, and titanium alloy. A certain amount of aqueous liquid is injected into the liquid tank 1024. The aqueous liquid includes one or more of the following liquids: tap water, deionized water, alcohol, acetone, and ether. The first gantry crane 1021 and the inner peeling frame 1025 are connected by a swing arm 1023. The first gantry crane 1021 controls the inner peeling frame 1025 to move along the depth direction of the liquid tank 1024, completely immersing the inner peeling frame 1025 in the liquid within the liquid tank 1024. The liquid-to-material ratio between the battery electrode to be peeled in the inner peeling frame 1025 and the aqueous liquid in the liquid tank 1024 is 0.5:1 to 10:1, with the unit being kg / L. The temperature of the aqueous liquid is controlled between 0 and 100 degrees Celsius, and the immersion time of the battery electrode to be peeled in the aqueous liquid is 1 to 60 minutes. The swing motor 1022 is used to drive the inner peeling frame 1025 to move along an arc via the swing arm 1023, with the swing amplitude of the arc movement being ±45 degrees. The inner frame 1025 is provided with liquid flow holes 1027 so that the liquid flow can fully contact the battery electrode, thereby increasing the peeling effect of the liquid flow on the battery electrode and realizing the separation of the material on the battery electrode from the current collector. The first crane 1021 drives the swing arm 1023 to control the inner frame 1025 to detach from the liquid surface of the aqueous liquid in the liquid tank 1024 for drainage. After drainage, it is transferred to the dehydration module 103.

[0087] The dehydration module 103 includes a pressure plate lifting motor 1031, a dehydration pressure plate 1032, and a dehydration platform 1033. Liquid flow holes 1034 are provided on the contact surface between the dehydration platform 1033 and the inner peeling frame 1025. The first gantry crane 1021 drives the swing arm 1023 to move the inner peeling frame 1025 to a fixed position on the dehydration platform 1033. The material of the dehydration platform 1033 includes stainless steel, ceramic, titanium alloy, and engineering plastic. The pressing surface shape of the dehydration pressure plate 1032 is consistent with the opening shape of the inner peeling frame 1025 and is slightly smaller than the inner peeling frame 1025. The shape includes rectangle or square. The pressure plate lifting motor 1031 controls the dehydration pressure plate 1032 to apply pressure to the peeled battery electrode sheets inside the peeling inner frame 1025, thereby drying and dehydrating the material and current collector on the peeled battery electrode sheets. The pressure applied by the pressure plate lifting motor 1031 driving the dehydration pressure plate 1032 is 0 to 1 MPa, and the pressure application time is 0 to 60 minutes. After dehydration is completed, the pressure plate lifting motor 1031 drives the peeling inner frame 1025 to transport it to the next station. The tilting assist motor 1026 is used to control the tilting and dumping of the dehydrated battery electrode sheets inside the peeling inner frame 1025.

[0088] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0089] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A battery electrode sheet stripping apparatus characterized by, The device comprises: a feeding module for feeding the battery pole pieces to be peeled into the peeling module; The peeling module comprises a first row of hangers, a swing motor, a swing hanging arm, a liquid tank, a peeling inner frame and a turnover assisting motor; the peeling inner frame is arranged in the liquid tank, the first row of hangers and the peeling inner frame are connected through the swing hanging arm, the first row of hangers controls the movement of the peeling inner frame in the depth direction of the liquid tank; the swing motor is used to drive the peeling inner frame to move along an arc through the swing hanging arm; the peeling inner frame is provided with a liquid flow hole; The dehydration module comprises a pressure plate lifting motor, a dehydration pressure plate and a dehydration platform; the dehydration platform is provided with a liquid flow hole on the contact surface of the peeling inner frame; the pressure plate lifting motor is used to control the dehydration pressure plate to press the peeled battery pole pieces in the peeling inner frame; The turnover assisting motor is used to control the turnover of the dehydrated battery pole pieces in the peeling inner frame.

2. The apparatus of claim 1, wherein, The feeding module is a second row of hangers or a feeding belt.

3. A battery electrode sheet peeling method characterized by, The application is applied to the battery pole piece peeling device in claim 1 or 2; the method comprises: controlling the feeding module and the peeling inner frame to move at a uniform speed to throw the battery pole pieces to be peeled into the peeling inner frame; driving the swing hanging arm through the first row of hangers to immerse the peeling inner frame into the aqueous liquid in the liquid tank; driving the swing hanging arm through the swing motor to control the arc movement of the peeling inner frame in the liquid tank; driving the swing hanging arm through the first row of hangers to control the peeling inner frame to separate from the liquid surface of the aqueous liquid in the liquid tank to drain water; driving the swing hanging arm through the first row of hangers to move the peeling inner frame to the dehydration platform; driving the dehydration pressure plate through the pressure plate lifting motor to control the dehydration pressure plate to press the peeled battery pole pieces in the peeling inner frame to dehydrate; controlling the turnover of the dehydrated battery pole pieces in the peeling inner frame through the turnover assisting motor.

4. The method of claim 3, wherein, The liquid-material ratio between the battery pole pieces to be peeled in the peeling inner frame and the aqueous liquid in the liquid tank is 0.5:1 to 10:1, and the unit of the liquid-material ratio is kg / L.

5. The method of claim 3, wherein, The temperature of the aqueous liquid is controlled at 0 to 100 degrees Celsius.

6. The method of claim 3, wherein, The soaking time of the battery pole pieces to be peeled immersed into the aqueous liquid is 1 to 60 minutes.

7. The method of claim 3, wherein, The swing amplitude of the arc movement is plus or minus 45 degrees.

8. The method of claim 3, wherein, The pressure applied by the pressure plate lifting motor to drive the dehydration pressure plate is 0 to 1 MPa.

9. The method of claim 3, wherein, The pressure application time of the pressure plate lifting motor to drive the dehydration pressure plate is 0 to 60 minutes.

10. The method of claim 3, wherein, The pressing surface shape of the dehydration pressure plate is consistent with the opening shape of the peeling inner frame.

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