Heat treatment device and battery processing apparatus

Abstract

A heat treatment device (100) and a battery processing apparatus. The heat treatment device (100) comprises: an oven (10), which is internally provided with a conveying channel (11); a first heating assembly (20), which is provided with an air supply port (21) in communication with the conveying channel (11); and a second heating assembly (30), which is used for projecting laser onto a surface of an electrode sheet (200) in the conveying channel (11), wherein in a preset direction, the first heating assembly (20) and the second heating assembly (30) are respectively located on two sides of the conveying channel (11), and the opening direction of the air supply port (21) is arranged opposite the projection direction of the second heating assembly (30). The first heating assembly (20) performs heat treatment on the electrode sheet (200) in an air supply manner, and the second heating assembly (30) performs heat treatment on the electrode sheet (200) in a laser manner, such that heating effects of two different manners can be combined, thereby improving the quality of heat treatment of the electrode sheet (200); moreover, the opening direction of the air supply port (21) is arranged opposite the projection direction of the second heating assembly (30), such that the first heating assembly (20) and the second heating assembly (30) can work together, thereby making the electrode sheet (200) heated more uniformly.

Description

Heat treatment device and battery processing equipment Related applications

[0001] This application claims priority to Chinese patent application number 2024200129990, filed on January 2, 2024, entitled “A Heat Treatment Device and Battery Processing Equipment,” the entire text of which is hereby incorporated by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a heat treatment device and battery processing equipment. Background Art

[0003] Electrodes are crucial components of battery cells. After production, they are coated with active materials and require heat treatment to dry them. However, current methods of heat treatment can lead to uneven heating across different areas of the electrode, impacting the quality of the heat treatment and, consequently, the overall structure of the electrode. Summary of the Invention

[0004] Based on this, the present application provides a heat treatment device and battery processing equipment.

[0005] In a first aspect, the present application provides a heat treatment device, comprising:

[0006] An oven having a conveying channel inside for transporting electrodes;

[0007] A first heating assembly is disposed on the oven and has an air outlet communicating with the conveying channel; and

[0008] a second heating assembly, disposed outside the oven and used to project laser light onto the surface of the electrode in the conveying channel;

[0009] Wherein, in a preset direction, the first heating component and the second heating component are respectively located on both sides of the conveying channel, and the opening direction of the air supply port is arranged opposite to the projection direction of the second heating component;

[0010] The preset direction is arranged to intersect with the pole piece in the conveying channel.

[0011] Through the above structure, the electrode is first transported through the conveying channel inside the oven and heat-treated during transportation, which can reduce the impact of the external environment on the electrode heat treatment process. In addition, the first heating component uses air to heat the electrode, and the second heating component uses laser to heat the electrode, which can combine the heating effects of the two different methods to improve the quality of the electrode heat treatment. In addition, the opening direction of the air supply port is arranged relative to the projection direction of the second heating component, so that the first heating component and the second heating component can work together to make the heating on the electrode more uniform.

[0012] In some embodiments, the first heating element and the second heating element each include a plurality of first heating elements and each second heating element is disposed in a one-to-one correspondence in a preset direction;

[0013] The first heating components and the second heating components located on the same side of the conveying channel in a preset direction are alternately arranged along the conveying direction of the electrode.

[0014] Thus, the first and second heating components are arranged in a one-to-one correspondence along a preset direction, allowing the first and second heating components to heat both sides of the thickness direction of the same area of ​​the electrode. On the one hand, the combination of the two different heating methods of the first and second heating components ensures that both sides of the thickness direction of the electrode are heated more evenly, improving the quality of the heat treatment. On the other hand, the first and second heating components are arranged relative to each other in the preset direction, which can reduce the probability of laser beams from the two second heating components interfering with each other, thereby reducing the probability of damage to the second heating components.

[0015] In some embodiments, the first heating component includes an air supply member, which is used to form an air flow and supply air to the air supply port. The second heating component includes a laser, which is arranged between the air supply member and the air supply port.

[0016] Through the above structure, the heat generated by the laser in the process of generating laser light can be fully utilized, and the heat can be fully utilized to heat the air flow in the air supply component, so that hot air is smoothly formed at the air supply port and blown to the surface of the electrode for drying.

[0017] In some embodiments, the first heating component includes an air supply member and a heat exchange component. The air supply member is used to form an air flow and supply air to the air outlet. The second heating component includes a laser. The heat exchange component is arranged between the air supply member and the laser to realize heat transfer between the laser and the air supply member.

[0018] In this way, the heat generated by the laser during the laser generation process can be fully utilized to heat the air flow in the air supply component, thereby smoothly forming hot air at the air supply port and blowing it to the surface of the electrode for drying.

[0019] In some embodiments, the second heating component further includes a laser emitting element and a transmission element. The transmission element is connected between the laser and the laser emitting element for transmitting laser light. The emission direction of the laser emitting element is set along a preset direction toward the inside of the conveying channel.

[0020] Through the above structure, the laser generated in the laser is transmitted to the laser emitting element. At the same time, the laser can be connected to the air supply element to heat the air flow through the heat of the laser to form hot air. The process of emitting the laser by the laser emitting element will not be affected by the air flow and will be more stable.

[0021] In some embodiments, the second heating component further includes a light guide member, which is disposed between the laser emitting member and the conveying channel and is used to project the laser onto the surface of the pole piece in the conveying channel.

[0022] By setting up the light guide, the irradiation range and irradiation position of the laser emitted by the laser emitting element can be adjusted, so that the laser can be more accurately irradiated on the target area on the surface of the pole piece, thereby improving the quality of heat treatment.

[0023] In some embodiments, the light introducing member comprises an optical lens.

[0024] By setting up optical lenses, not only can the irradiation area of ​​the laser on the surface of the pole piece be expanded to improve the heat treatment efficiency, but the specific position of the laser irradiation on the surface of the pole piece can also be adjusted, making the laser heating position of the pole piece more accurate.

[0025] In some embodiments, the light guide member further includes a stopper, which is disposed between the pole piece and the laser emitting member along a preset direction, and the stopper is disposed corresponding to an area on the pole piece that is not coated with active material.

[0026] By providing a stopper, the laser irradiated onto the area of ​​the electrode not coated with active material can be shielded, thereby protecting the area not coated with active material and making the overall structure of the electrode more stable.

[0027] In some embodiments, the heat treatment device further includes a first temperature measuring component, which is disposed in the conveying channel and is used to detect the internal temperature of the conveying channel.

[0028] In some embodiments, the heat treatment device further includes a second temperature measuring component, which is disposed in the conveying channel and is used to detect the surface temperature of the electrode.

[0029] In this way, the temperature in the conveying channel and the actual temperature on the surface of the pole piece can be detected in a timely and accurate manner, so as to better feedback and adjust the hot air frequency and the starting power of the laser.

[0030] In a second aspect, the present application also provides a battery processing device, including the heat treatment device as described above.

[0031] The above-mentioned heat treatment device and battery processing equipment transport the electrode through the conveying channel inside the oven and heat treat the electrode during transportation, which can reduce the impact of the external environment on the heat treatment process of the electrode; in addition, the first heating component uses air supply to heat treat the electrode, and the second heating component uses laser to heat treat the electrode, which can combine the heating effects of two different methods to improve the quality of the heat treatment of the electrode, and the opening direction of the air supply port is set relative to the projection direction of the second heating component, so that the first heating component and the second heating component can cooperate together to make the heating on the electrode more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0033] FIG. 1 is a schematic structural diagram of a heat treatment apparatus according to one or more embodiments.

[0034] FIG. 2 is a schematic structural diagram of a stopper in a heat treatment apparatus according to one or more embodiments.

[0035] Explanation of the accompanying drawings: 100, heat treatment device; 200, pole piece; 201, coating area; 202, blank area; 10, oven; 20, first heating component; 30, second heating component; 11, conveying channel; 21, air outlet; 22, air supply part; 31, laser; 32, laser emitting part; 33, transmission part; 34, light-guiding part; 341, optical lens; 342, stopper; a, preset direction; b, conveying direction. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if the terms "thickness", "up", "down", "vertical", "horizontal", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0040] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in other fields. As the application of power batteries continues to expand, market demand is also growing.

[0041] A battery cell is the smallest unit of a battery. Its structure includes an electrode assembly, formed by stacking or winding positive and negative electrodes and a separator. The electrode assembly is the component within the battery cell where the electrochemical reaction occurs. Active materials are coated on the positive and negative electrodes, respectively. During the battery's charge and discharge processes, the active materials on the positive and negative electrodes react with the electrolyte, enabling the battery to function properly.

[0042] After the electrode sheets (including positive and negative electrodes) are manufactured, in order to facilitate stacking or winding of the electrode sheets and the separator, the electrode sheets need to be heat treated so that the active materials on the electrode sheets can be dried quickly.

[0043] Currently, lasers are commonly used to heat pole pieces. Lasers have high heating efficiency and can effectively improve the overall production efficiency of batteries. However, during laser heat treatment, due to the high power density of the laser, the temperature of the pole piece rises very quickly, but the penetration depth is low. This can easily cause problems such as uneven heating across the thickness of the pole piece or excessive heating that can burn the pole piece surface, affecting the overall structure of the pole piece.

[0044] Based on the above considerations, in order to solve the problem of uneven heating during the current heat treatment of the electrode, thereby affecting the overall structure of the electrode, the present application proposes a heat treatment device, which transports the electrode through a conveying channel inside the oven and heat treats the electrode during transportation, which can reduce the impact of the external environment on the heat treatment process of the electrode; in addition, the first heating component uses air supply to heat treat the electrode, and the second heating component uses laser to heat treat the electrode, which can combine the heating effects of two different methods to improve the quality of the heat treatment of the electrode, and the opening direction of the air supply port is set relative to the projection direction of the second heating component, so that the first heating component and the second heating component can cooperate together to make the heating on the electrode more uniform.

[0045] The battery obtained by processing with the heat treatment device and battery processing equipment provided by the present application has its pole pieces heated more evenly, thereby making the structure of the formed battery more stable.

[0046] The batteries obtained by the heat treatment device and battery processing equipment of the present application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. Electrical devices using batteries as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. Electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0047] Referring to FIG1 , an embodiment of the present application provides a heat treatment device 100, comprising an oven 10, a first heating component 20, and a second heating component 30. The oven 10 has a conveying channel 11 for transporting the electrode 200. The first heating component 20 is disposed on the oven 10 and has an air outlet 21 connected to the conveying channel 11. The second heating component 30 is disposed outside the oven 10 and is used to project a laser onto the surface of the electrode 200 in the conveying channel 11. In a preset direction a, the first heating component 20 and the second heating component 30 are respectively located on either side of the conveying channel 11, and the opening direction of the air outlet 21 is arranged opposite to the projection direction of the second heating component 30. The preset direction a is arranged to intersect the electrode 200 in the conveying channel 11.

[0048] It should be noted that the heat treatment device 100 is a device capable of heating and drying the electrode 200 to dry the active material on the electrode 200. The oven 10 is configured as a hollow box structure, and a conveying channel 11 for transporting the electrode 200 is formed therein. The conveying channel 11 is provided with openings at both ends. The electrode 200 enters the conveying channel 11 through one opening and moves out of the conveying channel 11 through the other opening.

[0049] The moving direction of the electrode piece 200 in the conveying channel 11 is the conveying direction b of the electrode piece 200 .

[0050] The first heating assembly 20 is a structure that blows hot air onto the surface of the electrode 200 in the conveying channel 11 to dry the electrode 200. The first heating assembly 20 is disposed on the oven 10 and communicates with the conveying channel 11 through an air outlet 21.

[0051] Thus, the first heating component 20 can blow hot air into the conveying channel 11 through the air outlet 21 to dry the electrode 200 inside the conveying channel 11 .

[0052] The second heating assembly 30 is a structure capable of projecting laser light onto the surface of the electrode 200 within the conveying channel 11, thereby drying the electrode 200 through laser irradiation. The second heating assembly 30 is positioned outside the oven 10 and, through light guidance, projects laser light onto the surface of the electrode 200 within the conveying channel 11. This reduces the likelihood of interference or damage to the second heating assembly 30 caused by the internal environment of the oven 10, thereby improving the heating effect.

[0053] Furthermore, the preset direction a is arranged perpendicular to the electrode piece 200 in the conveying channel 11 , that is, when the electrode piece 200 moves horizontally in the conveying channel 11 , the preset direction a is a vertical direction.

[0054] In the preset direction a, the first heating assembly 20 and the second heating assembly 30 are respectively located on opposite sides of the conveying passage 11. That is, when the first heating assembly 20 is located above the conveying passage 11, the second heating assembly 30 is located below the conveying passage 11. Conversely, when the first heating assembly 20 is located below the conveying passage 11, the second heating assembly 30 is located above the conveying passage 11.

[0055] Furthermore, in the preset direction a, the first heating assembly 20 and the second heating assembly 30 are arranged in a one-to-one correspondence, and the opening direction of the air outlet 21 of the first heating assembly 20 is arranged opposite to the projection direction of the second heating assembly 30. That is, when the opening direction of the air outlet 21 of the first heating assembly 20 is arranged downward, the projection direction of the second heating assembly 30 is arranged upward. Conversely, when the opening direction of the air outlet 21 of the first heating assembly 20 is arranged upward, the projection direction of the second heating assembly 30 is arranged downward.

[0056] Through the above structure, the electrode 200 is first transported in the conveying channel 11 inside the oven 10, and the electrode 200 is heat-treated during transportation, which can reduce the impact of the external environment on the heat treatment process of the electrode 200. In addition, the first heating component 20 uses air supply to heat treat the electrode 200, and the second heating component 30 uses laser to heat treat the electrode 200, which can combine the heating effects of two different methods to improve the quality of the heat treatment of the electrode 200. In addition, the opening direction of the air supply port 21 is arranged relative to the projection direction of the second heating component 30, so that the first heating component 20 and the second heating component 30 can work together to make the heating on the electrode 200 more uniform.

[0057] In some embodiments, the first heating assembly 20 and the second heating assembly 30 are each provided in plurality, and each first heating assembly 20 and each second heating assembly 30 are arranged in a one-to-one correspondence in a predetermined direction a. The first heating assemblies 20 and the second heating assemblies 30 located on the same side of the conveying channel 11 in the predetermined direction a are alternately arranged along the conveying direction b of the electrode 200.

[0058] Specifically, a plurality of first heating assemblies 20 and a plurality of second heating assemblies 30 are respectively disposed on the upper and lower sides of the conveying channel 11. On the upper side of the conveying channel 11, the first heating assemblies 20 and the second heating assemblies 30 are sequentially disposed along the conveying direction b of the electrode 200, i.e., a first heating assembly 20 is disposed first, followed by a second heating assembly 30, then another first heating assembly 20, and then a second heating assembly 30, and so on.

[0059] On the lower side of the conveying channel 11, corresponding to the upper side, the second heating assembly 30 and the first heating assembly 20 are arranged in sequence along the conveying direction b of the electrode 200. That is, first, a second heating assembly 30 is arranged, and this second heating assembly 30 is arranged corresponding to the first first heating assembly 20 on the upper side along the preset direction a. Then, a first heating assembly 20 is arranged, and this first heating assembly 20 is arranged corresponding to the second second heating assembly 30 on the upper side. Then, a second heating assembly 30 is arranged, and this second heating assembly 30 is arranged corresponding to the third first heating assembly 20 on the upper side. Then, a first heating assembly 20 is arranged, and this first heating assembly 20 is arranged corresponding to the fourth second heating assembly 30 on the upper side, and so on.

[0060] Thus, the first heating assembly 20 and the second heating assembly 30 are arranged in a one-to-one correspondence along the preset direction a, so that the first heating assembly 20 and the second heating assembly 30 can heat the surfaces of both sides of the same area of ​​the electrode 200 in the thickness direction respectively. On the one hand, the combination of the two different heating methods of the first heating assembly 20 and the second heating assembly 30 makes the heating of both sides of the electrode 200 in the thickness direction more uniform, improving the quality of the heat treatment. On the other hand, the first heating assembly 20 and the second heating assembly 30 are arranged relative to each other in the preset direction a, which can reduce the probability of laser beams from the two second heating assemblies 30 interfering with each other, thereby reducing the probability of damage to the second heating assemblies 30.

[0061] In some embodiments, the first heating component 20 includes an air supply member 22 for forming an air flow and supplying air to the air outlet 21 , and the second heating component 30 includes a laser 31 , which is disposed between the air supply member 22 and the air outlet 21 .

[0062] Specifically, the air supply member 22 can be but is not limited to being set as a fresh air system, and the air supply port 21 can be opened on the air supply member 22. The air supply member 22 forms an air flow and then supplies air to the air supply port 21, so that the air flow is blown out through the air supply port 21 to the surface of the pole piece 200 in the conveying channel 11.

[0063] The laser 31 is a structure capable of generating laser light. The laser 31 also generates heat during the laser light generation process. The laser 31 is positioned between the air supply member 22 and the air outlet 21. Specifically, the airflow generated by the air supply member 22 first flows through the laser 31. The heat generated by the laser 31 forms hot air, which is then blown out through the air outlet 21 into the delivery channel 11.

[0064] Through the above structure, the heat generated by the laser 31 during the laser generation process can be fully utilized, and the heat can be fully utilized to heat the air flow in the air supply part 22, so that hot air is smoothly formed at the air supply port 21 and blown to the surface of the pole piece 200 for drying.

[0065] In some embodiments, the first heating component 20 includes an air supply member 22 and a heat exchange component (not shown in the figure), the air supply member 22 is used to form an airflow and supply air to the air outlet 21, the second heating component 30 includes a laser 31, and the heat exchange component is arranged between the air supply member 22 and the laser 31 to realize heat transfer between the laser 31 and the air supply member 22.

[0066] Heat exchange media such as oil or water can be set in the heat exchange component, and heat storage structures such as solid-liquid phase change materials can also be used for heat transfer.

[0067] Specifically, the heat exchange component is arranged between the air supply member 22 and the laser 31, so that the heat exchange medium in the heat exchange component first exchanges heat with the laser 31, and the heat generated by the laser 31 is used to heat the heat exchange medium, and then the heat exchange medium heats the air flow formed by the air supply member 22 to form hot air and blow it to the surface of the pole piece 200 through the air supply port 21.

[0068] In this way, the heat generated by the laser 31 during the laser generation process can be fully utilized to heat the air flow in the air supply member 22, so that hot air is smoothly formed at the air supply port 21 and blown to the surface of the electrode 200 for drying.

[0069] In some embodiments, the second heating component 30 also includes a laser emitting element 32 and a transmission element 33. The transmission element 33 is connected between the laser 31 and the laser emitting element 32 for transmitting laser light. The emission direction of the laser emitting element 32 is set along a preset direction a toward the inside of the conveying channel 11.

[0070] Specifically, the laser emitting element 32 is a component capable of emitting laser light so that the laser light can be smoothly irradiated to the target location. The transmission element 33 can be, but is not limited to, an optical fiber. The transmission element 33 is connected between the laser emitting element 32 and the laser 31, transmitting the laser light generated by the laser 31 to the laser emitting element 32, and then emitting the laser light into the delivery channel 11 through the laser emitting element 32.

[0071] Through the above structure, the laser generated in the laser 31 is transmitted to the laser emitting element 32. At the same time, the laser 31 can be connected to the air supply element 22 to heat the air flow through the heat of the laser 31 to form hot air. The process of emitting laser by the laser emitting element 32 will not be affected by the air flow and will be more stable.

[0072] In some embodiments, the second heating assembly 30 further includes a light guide 34 , which is disposed between the laser emitting element 32 and the delivery channel 11 and is used to project the laser onto the surface of the pole piece 200 in the delivery channel 11 .

[0073] Specifically, the light guide member 34 refers to a component that can guide the laser emitted by the laser emitting member 32 so that the laser can be irradiated more accurately on the target area on the surface of the pole piece 200 .

[0074] Therefore, by setting the light guide member 34, the irradiation range and irradiation position of the laser emitted by the laser emitting member 32 can be adjusted, so that the laser can be more accurately irradiated on the target area on the surface of the pole piece 200, thereby improving the quality of heat treatment.

[0075] In some embodiments, the light guide member 34 includes an optical lens 341 .

[0076] Specifically, the light guide member 34 can be, but is not limited to, an optical lens 341 such as a convex lens. The convex lens can diffuse the laser light emitted by the laser emitting member 32 to expand the irradiation area of ​​the laser on the surface of the pole piece 200 and improve the heat treatment efficiency.

[0077] In addition, the specific position where the laser is irradiated on the surface of the pole piece 200 can be adjusted by moving the position of the optical lens 341, so that the laser can more accurately perform heat treatment on the target area on the pole piece 200.

[0078] Therefore, by setting the optical lens 341, not only can the irradiation area of ​​the laser on the surface of the pole piece 200 be expanded to improve the heat treatment efficiency, but also the specific position of the laser irradiation on the surface of the pole piece 200 can be adjusted, so that the laser heating position of the pole piece 200 is more accurate.

[0079] Please refer to Figure 1 and Figure 2 together. In some embodiments, the light guide member 34 also includes a stopper 342, which is arranged between the pole piece 200 and the laser emitting member 32 along a preset direction a, and the stopper 342 is arranged corresponding to the area on the pole piece 200 that is not coated with active material.

[0080] Specifically, the stopper 342 is configured as a baffle, which is arranged parallel to the pole piece 200 in the conveying channel 11, and is located between the pole piece 200 and the laser emitting element 32 along the preset direction a. The baffle can be set on the optical lens 341.

[0081] It should be noted that the electrode 200 has a coated area 201 coated with active material and a blank area 202 not coated with active material. During the heat treatment of the electrode 200, the coated area 201 on the electrode 200 is actually heated and dried. In other words, the blank area 202 on the electrode 200 does not need to be heated. Moreover, since the blank area 202 is not blocked by active material, excessive heating may cause burns to the electrode 200.

[0082] Therefore, the baffle is set corresponding to the blank area 202 on the pole piece 200 that is not coated with active material, and the baffle blocks the laser irradiated toward the blank area 202 so that the laser is only irradiated to the coated area 201 on the pole piece 200.

[0083] In addition, the stopper 342 can be set to be detachable. By changing the size and number of the stopper 342, the stopper 342 can better block the blank area 202 on the pole piece 200. The specific shape of the stopper 342 can also be adjusted according to the shape of the blank area 202 on the pole piece 200, so that the stopper 342 can better block the blank area 202.

[0084] By providing the stopper 342 , the laser irradiated onto the area of ​​the electrode 200 not coated with the active material can be shielded, thereby protecting the area not coated with the active material and making the overall structure of the electrode 200 more stable.

[0085] In some embodiments, the heat treatment device 100 further includes a first temperature measuring element (not shown), which is disposed in the conveying channel 11 and is used to detect the temperature inside the conveying channel 11. In some embodiments, the heat treatment device 100 further includes a second temperature measuring element (a first temperature measuring element), which is disposed in the conveying channel 11 and is used to detect the surface temperature of the electrode 200.

[0086] Specifically, the first temperature measuring element and the second temperature measuring element can both be set as temperature measuring probes, wherein the first temperature measuring element is used to detect the overall temperature in the conveying channel 11, and the second temperature measuring element is used to detect the surface temperature on the electrode 200.

[0087] In this way, the temperature in the conveying channel 11 and the actual temperature on the surface of the pole piece 200 can be detected timely and accurately, so as to better feedback and adjust the hot air frequency and the starting power of the laser 31.

[0088] Based on the same concept as the above-mentioned heat treatment device 100 , the present application also provides a battery processing device, including the above-mentioned heat treatment device 100 .

[0089] According to one or more embodiments, the pole piece 200 roll is placed on a roller and belt structure, driving the pole piece 200 to move along the conveying direction b and pass through the conveying channel 11.

[0090] When the pole piece 200 passes through the conveying channel 11, an air flow is formed inside the air supply member 22. After the air flow exchanges heat with the heat generated by the laser 31, hot air is formed. The hot air is blown to the surface of the pole piece 200 through the air supply port 21. At the same time, the laser light generated inside the laser 31 is transmitted to the laser emitting member 32 via an optical fiber. Then, the laser light is emitted toward the inside of the conveying channel 11 by the laser emitting member 32, and after being adjusted by the optical lens 341, it is irradiated to the target area on the pole piece 200.

[0091] Thus, by simultaneously heating both sides of the electrode piece 200 in the thickness direction with hot air and laser, the electrode piece 200 can be heated more evenly, thereby improving the efficiency and quality of the heat treatment of the electrode piece 200.

[0092] In addition, since the heat generated by the laser 31 is used to heat the airflow, on the one hand, no additional cooling structure is required to cool the laser 31. On the other hand, the airflow can be smoothly heated to form hot air that is blown to the surface of the pole piece 200 for heating.

[0093] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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 specification.

[0094] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A heat treatment device, comprising: An oven having a conveying channel therein for conveying electrode sheets; A first heating component disposed on the oven and having an air supply opening communicating with the conveying channel; And A second heating component disposed outside the oven and configured to project a laser onto the surface of the electrode sheet within the conveying channel; Wherein, in a preset direction, the first heating component and the second heating component are respectively located on both sides of the conveying channel, and the opening direction of the air supply opening is oppositely arranged to the projection direction of the second heating component; The preset direction intersects with the electrode sheet within the conveying channel.

2. The heat treatment apparatus according to claim 1, wherein, Both the first heating component and the second heating component include a plurality of them, and each first heating component and each second heating component are arranged in one-to-one correspondence in the preset direction; In the preset direction, the first heating components and the second heating components located on the same side of the conveying channel are alternately arranged along the conveying direction of the electrode sheet.

3. The heat treatment apparatus according to claim 1 or 2, wherein, The first heating component includes an air supply member configured to form an air flow and supply air to the air supply opening, and the second heating component includes a laser, and the laser is disposed between the air supply member and the air supply opening.

4. The heat treatment apparatus according to any one of claims 1 to 3, wherein, The first heating component includes an air supply member and a heat exchange component, the air supply member is configured to form an air flow and supply air to the air supply opening, the second heating component includes a laser, and the heat exchange component is disposed between the air supply member and the laser for achieving heat transfer between the laser and the air supply member.

5. The heat treatment apparatus according to claim 3 or 4, wherein, The second heating component further includes a laser emitting member and a transmission member, the transmission member is connected between the laser and the laser emitting member for transmitting the laser, and the emitting direction of the laser emitting member is arranged towards the inside of the conveying channel along the preset direction.

6. The heat treatment apparatus according to claim 5, wherein, The second heating component further includes a light guiding member, the light guiding member is disposed between the laser emitting member and the conveying channel for projecting the laser onto the surface of the electrode sheet within the conveying channel.

7. The heat treatment apparatus according to claim 6, wherein, The light guiding member includes an optical lens.

8. The heat treatment apparatus according to claim 7, wherein, The light guiding member further includes a stop member, the stop member is arranged along the preset direction between the electrode sheet and the laser emitting member, and the stop member is correspondingly arranged with the area of the electrode sheet where no active material is coated.

9. The heat treatment apparatus according to any one of claims 1-8, wherein, The heat treatment device further includes a first temperature measuring member disposed within the conveying channel and configured to detect the internal temperature of the conveying channel.

10. The heat treatment apparatus according to any one of claims 1-9, wherein, The heat treatment device further includes a second temperature measuring member disposed within the conveying channel and configured to detect the surface temperature of the electrode sheet.

11. A battery processing device, comprising the heat treatment device according to any one of claims 1 - 10.

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