Pole piece drying device and battery production equipment

Abstract

The application relates to the technical field of battery manufacturing, in particular to a pole piece drying device and a battery production equipment. The pole piece drying device comprises a shell, one end of the shell is in an open shape, the other end is provided with a through hole, the inner wall of the shell is gradually narrowed from the open end to the end provided with the through hole; a plurality of heating nets are arranged in the shell at intervals from one end of the shell to the other end; a vacuum pump is communicated with the shell through the through hole; a temperature detection assembly is installed on the shell and used for detecting the temperature values of the plurality of heating nets; and an air pressure detection assembly is installed on the shell and used for detecting the pressure at the positions of the plurality of heating nets. The pole piece drying device provided by the application promotes the water in the pole piece to quickly separate from the surface of the active layer at a certain baking temperature, shortens the drying time of the pole piece, and improves the drying efficiency of the pole piece.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode drying apparatus and battery production equipment. Background Technology

[0002] Before use, the electrode sheets need to be dried to remove moisture. In particular, the negative electrode sheets need to be dried before lithium replenishment in order to fully exert the lithium replenishment effect.

[0003] like Figure 1 As shown, the traditional process involves processing the electrode sheets through a hot roller press. However, with this process, the electrode sheets require a relatively slow conveyor speed as they pass through the roller gap to achieve a certain level of moisture removal, severely limiting production capacity. Furthermore, the moisture removal effect of a single hot roller press is not ideal. Or, as... Figure 2 As shown, the traditional process involves processing the electrode sheets using a series-connected hot roller press. In this press, two heating rollers on the same side of the electrode sheet are connected by a ring-shaped heat-conducting tape. However, this process makes it difficult to balance dehydration efficiency with production cycle time, and the complex temperature control and heat loss from the conveyor belt lead to high energy consumption. Furthermore, with both of these processes, the heating rollers are directly exposed to the air, resulting in easy heat dissipation. This causes the temperature at the edge of the electrode sheet to be lower than the center temperature, leading to uneven heating and problems such as copper foil wrinkling and active layer peeling, thus affecting product yield. Utility Model Content

[0004] Based on this, this application provides an electrode drying apparatus and battery production equipment, which improves the drying speed of the electrode, shortens the drying time, and reduces wrinkles and cracks in the electrode caused by uneven heating.

[0005] The first aspect of this application provides an electrode drying apparatus, comprising:

[0006] The shell has an open end and a through hole at the other end. The inner wall of the shell gradually narrows from the open end to the end with the through hole.

[0007] Multiple heating grids are spaced apart inside the housing from one end to the other.

[0008] A vacuum pump is connected to the housing through the through hole;

[0009] A temperature detection component, mounted on the housing, is used to detect the temperature values ​​of multiple heating grids;

[0010] A pressure detection component, installed on the housing, is used to detect the pressure at the locations of the multiple heating grids.

[0011] In some embodiments, the electrode drying apparatus further includes: a control component communicatively connected to the temperature detection component, used to adjust the input power of the heating grid according to the temperature value;

[0012] Furthermore, the pressure detection component and the vacuum pump are connected to the control component, and the control component controls the speed of the vacuum pump according to the pressure.

[0013] In some embodiments, the electrode drying apparatus also includes a recovery component connected to a vacuum pump.

[0014] In some implementations, the number of heating meshes is N, where N ≥ 5 and is an integer.

[0015] In some implementations, 5 ≤ N ≤ 7.

[0016] In some implementations, the distance between any two adjacent heating grids is 10cm to 20cm.

[0017] In some implementations, the aperture size of the heating mesh is 100 mesh to 200 mesh.

[0018] In some embodiments, the inner surface of the housing is provided with an absorbent layer.

[0019] In some embodiments, the housing includes a metal housing; the surface of the metal housing is connected to an insulation layer.

[0020] In some embodiments, the insulation layer is a foam insulation layer, a polyurethane insulation layer, a polystyrene insulation layer, or an aerogel insulation layer.

[0021] The second aspect of this application provides a battery manufacturing apparatus, including an electrode drying apparatus as provided in the first aspect of this application.

[0022] Compared with traditional technologies, this application has the following advantages:

[0023] This application creates a "tower-shaped" cavity inside the shell by designing the inner wall of the shell to gradually narrow from the open end to the end with the through hole. Multiple heating grids are spaced apart inside the shell. As the temperature of the heating grids gradually decreases from the open end to the through hole end, a vacuum pump simultaneously creates a pressure difference within the cavity. This allows outside air to enter from the open end of the shell and exit from the through hole end. The air flow causes moisture on the surface of the electrode sheet to move, promoting the rapid removal of moisture from the active layer at a certain baking temperature. This shortens the drying time of the electrode sheet and improves its drying efficiency.

[0024] This application employs a heating mesh structure, which conducts heat to the electrode through the air between the heating mesh and the electrode, ensuring uniform heating of the electrode surface and reducing wrinkles and cracks caused by uneven heating. Simultaneously, the heating mesh increases the heated surface area of ​​the electrode, improving drying efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a traditional hot roller press.

[0027] Figure 2 This is a schematic diagram of another traditional hot roller press.

[0028] Figure 3 This is a schematic diagram of an electrode drying apparatus according to one embodiment of this application.

[0029] Figure 4 This is a perspective sectional view of an electrode drying apparatus according to one embodiment of this application.

[0030] Explanation of reference numerals in the attached figures

[0031] 1. Electrode drying device;

[0032] 10. Unwinding mechanism; 20. Heating mechanism; 30. Rewinding mechanism; 40. Electrode sheet; 50. Heating roller; 60. Heat conducting tape;

[0033] 100, Housing; 110, Metal Housing; 120, Insulation Layer; 200, Heating Grid; 300, Temperature Detection Component; 310, Temperature Sensor; 400, Pressure Detection Component; 410, Pressure Sensor; 500, Vacuum Pump; 600, Recovery Component; 700, Water Absorbent Layer; 800, Through Hole. Detailed Implementation

[0034] A detailed reference is now provided to embodiments of this application, one or more of which are described below. Each embodiment is provided for explanation and not for limitation. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to this application without departing from its scope or spirit. For example, features described or illustrated as part of one embodiment may be used in another embodiment to produce further embodiments.

[0035] Therefore, this application is intended to cover such modifications and variations falling within the scope of the appended claims and their equivalents. Other objects, features, and aspects of this application are disclosed in or will be apparent from the following detailed description. It will be understood by those skilled in the art that this discussion is merely a description of exemplary embodiments and is not intended to limit the broader aspects of this application.

[0036] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0037] In this application, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0038] In this article, when referring to units of data ranges, if a unit is only followed by the right endpoint, it means that the units of the left and right endpoints are the same.

[0039] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0040] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0041] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, if the method includes steps (a) and (b), it means that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, if the method may also include step (c), it means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0042] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0043] See Figure 1 , Figure 1A conventional electrode drying device 1 for removing moisture from electrode sheets 40 includes an unwinding mechanism 10, a winding mechanism 30, and a hot roller press located between the two. The hot roller press consists of two heating rollers 50 with a gap between them. The electrode sheets 40 conveyed by the unwinding mechanism 10 pass through the gap between the two heating rollers 50 to reach the winding mechanism 30. Since only the cut surface of the heating rollers 50 can transfer heat in this device, the electrode sheets 40 need a relatively slow conveyor speed when passing through the roller gap to achieve a certain moisture removal effect, which seriously restricts the production capacity. Moreover, the moisture removal effect of a single overheating roller is not ideal.

[0044] See Figure 2 , Figure 2 Another conventional electrode drying device 1 for removing moisture from electrode sheets 40 includes an unwinding mechanism 10, a winding mechanism 30, and a series-connected hot roller press located between the two. In the series-connected hot roller press, two heating rollers 50 located on the same side of the electrode sheet 40 are connected by an annular heat-conducting tape 60. However, when using this process, only the roll section of the heating roller 50 and the heat-conducting tape 60 can transfer heat, and the heat transfer efficiency of the annular heat-conducting tape 60 is limited. The temperature on the heat-conducting tape 60 cannot be completely equal to the temperature on the heating roller 50, resulting in low baking efficiency. It is difficult to balance the dehydration efficiency with the production cycle, and the complex temperature control and heat loss of the conveyor belt lead to high energy consumption.

[0045] In addition, when using the above two processes, the heating roller 50 is directly exposed to the air at both ends, which easily dissipates heat. This causes the temperature at the edge of the electrode sheet 40 to be lower than the temperature at the center of the electrode sheet 40. Uneven heating causes problems such as copper foil wrinkles and active layer peeling, which affects the product yield.

[0046] Based on this, the first aspect of this application provides an electrode drying apparatus 1, such as... Figures 3-4 As shown, the electrode drying device 1 includes a heating mechanism 20, which includes a housing 100, a heating grid 200, a temperature detection component 300, a vacuum pump 500, and a pressure detection component.

[0047] The housing 100 has an open end and a through hole 800 at the other end. The inner wall of the housing 100 gradually narrows from the open end to the end with the through hole 800.

[0048] There are multiple heating grids 200, which are spaced apart inside the housing 100 from one end to the other.

[0049] Temperature detection component 300 is installed on housing 100 and is used to detect the temperature values ​​of multiple heating grids 200.

[0050] The vacuum pump 500 is connected to the housing 100 through a through hole 800 at one end of the housing 100.

[0051] A pressure detection component is installed on the housing 100 to detect the pressure at the locations of the multiple heating grids 200. This application creates a "tower-shaped" cavity inside the housing 100 by gradually narrowing the inner wall of the heating mechanism 20 from an open end to the end with the through hole 800. Multiple heating grids 200 are spaced apart inside the housing 100. When the temperature of the heating grids 200 is gradually reduced along the direction from the open end to the end with the through hole 800, a pressure difference is created within the cavity by the vacuum pump 500. This allows outside air to enter from the open end of the housing 100 and flow out from the through hole 800. The flow of gas causes moisture on the surface of the electrode sheet to flow, promoting the rapid removal of moisture from the active layer surface at a certain baking temperature, thus shortening the drying time of the electrode sheet 40 and improving its drying efficiency.

[0052] This application employs a heating mesh 200 structure, which conducts heat to the electrode plate 40 through the air between the heating mesh 200 and the electrode plate, ensuring uniform heating of the electrode plate 40 surface and reducing wrinkles and cracks caused by uneven heating. Simultaneously, the heating mesh 200 increases the heated surface area of ​​the electrode plate 40, improving drying efficiency.

[0053] The heating mechanism 20 in this application is small in size. Compared with the large and bulky traditional heating roller 50 mechanism, it can be set up more flexibly above and below the electrode plate 40, reducing site costs.

[0054] It is understood that the electrode drying device 1 in this application can be used to dry positive electrode sheets or negative electrode sheets.

[0055] In some embodiments, the control component is communicatively connected to the temperature detection component 300 for adjusting the input power of the heating grid 200 according to the temperature value, and the pressure detection component and the vacuum pump 500 are communicatively connected to the control component, and the control component controls the rotation speed of the vacuum pump 500 according to the pressure.

[0056] In some embodiments, a plurality of heating grids 200 are arranged at equal intervals along one end of the housing 100 to the other end within the housing 100.

[0057] In some embodiments, the temperature detection assembly 300 includes a plurality of temperature sensors 310, which are respectively installed on the outside of the housing 100 at the locations of the plurality of heating grids 200.

[0058] In some embodiments, the distance between any two adjacent heating grids 200 is 10cm to 20cm, including but not limited to 10cm, 12cm, 14cm, 16cm, 18cm, and 20cm.

[0059] If the distance is too small, the volume between adjacent heating grids 200 will be too small, and the gas flow rate will be too fast, which may cause the electrode edges to lift, resulting in wrinkles or even cracks. If the distance is too large, the volume between adjacent heating grids 200 will be too small, and the gas flow rate will be too slow, resulting in a decrease in the drying efficiency of the electrode. Therefore, this application improves the drying efficiency by controlling the distance between any two adjacent heating grids 200 within a suitable range, maintaining a moderate gas flow rate, and avoiding the lifting of the electrode edges, wrinkles, or even cracks.

[0060] In some embodiments, the number of heating meshes 200 is N, where N ≥ 5 and is an integer. Further, 5 ≤ N ≤ 7, for example, the number of heating meshes 200 is 5, 6, or 7.

[0061] In some embodiments, along the first direction, the temperature values ​​of the plurality of heating grids 200 are T1, T2 up to Tn, where n is equal to the number N of heating grids 200, and the temperature value gradually decreases from T1 to Tn.

[0062] It should be noted that the "first direction" in this application refers to the direction from one end of the housing 100 that is open to the end of the housing 100 that has a through hole 800.

[0063] In some implementations, the temperature difference between any two adjacent heating grids 200 is 100 / n℃.

[0064] In some embodiments, the temperatures of the multiple heating grids 200 are each independently between 100°C and 200°C, including but not limited to 100°C, 120°C, 140°C, 160°C, 180°C, and 200°C.

[0065] In some implementations, T1 is (200-100 / n)℃~200℃, T2 is (200-200 / n)℃~(200-100 / n)℃, T3 is (200-300 / n)℃~(200-200 / n)℃, and so on, with Tn being 100℃~(100+100 / n)℃.

[0066] In one specific embodiment, the number of heating meshes 200 is 5, then T1 is 180℃~200℃, T2 is 160℃~180℃, T3 is 140℃~160℃, T4 is 120℃~140℃, and T5 is 100℃~120℃.

[0067] Understandably, if the temperature value fed back to the control component by the temperature sensor 310 is lower than the actual required temperature, the control component will increase the input power of the heating grid 200 to raise the temperature of the heating grid 200; if the temperature value fed back to the control component by the temperature sensor 310 is higher than the actual required temperature, the control component will decrease the input power of the heating grid 200 to lower the temperature of the heating grid 200.

[0068] This application utilizes the air density difference caused by the temperature difference between each heating grid 200. The gas with higher temperature rises due to its lower specific gravity, thereby creating a pressure difference inside the housing 100. This causes outside air to enter the housing 100 from the opening of the heating mechanism 20 and flow in the first direction inside the housing 100. This, in turn, causes the moisture on the surface of the electrode plate 40 to flow, allowing the moisture in the electrode plate to quickly detach from the surface of the active layer at a certain baking temperature, thus shortening the drying time of the electrode plate 40 and improving the drying efficiency of the electrode plate 40.

[0069] It is understood that this application does not impose any particular limitation on the material of the heating mesh 200. Without departing from the overall inventive concept of this application, any known heat-conducting metallic material can be used in this application. As an example only, the material of the heating mesh 200 includes one or more of the following: silver, gold, nickel, copper, aluminum, molybdenum, tungsten, titanium, stainless steel, nickel-chromium alloy, and copper-zinc alloy.

[0070] In some embodiments, the aperture size of the heating mesh 200 is 100 mesh to 200 mesh, including but not limited to 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, and 200 mesh. Setting the aperture size of the heating mesh 200 within a suitable range takes into account both the heating performance and air circulation of the heating mesh 200.

[0071] In some embodiments, the air pressure detection assembly 400 includes a plurality of air pressure sensors 410, each independently mounted on the outside of the housing 100 at a location corresponding to a plurality of heating grids 200.

[0072] In some embodiments, the pressure detection component 400 and the vacuum pump 500 are both communicatively connected to the control component, and the control component adjusts the rotation speed of the vacuum pump 500 according to the pressure control value fed back by the pressure detection component 400, so as to adjust the pressure at the location of the multiple heating grids 200.

[0073] It is understandable that pressure is related to the size of the space. When the vacuum pump 500 is turned on, a certain pressure is generated at the vacuum pump 500, creating a pressure difference between the vacuum pump 500 and the uppermost layer of the housing 100. This causes air to flow towards the vacuum pump 500 along the first direction, generating a certain pressure on the uppermost layer of the housing 100. This causes the air in the lower layer immediately adjacent to the uppermost layer of the housing 100 to continue flowing to the uppermost layer, and so on. Since the spaces where the multiple heating grids 200 are located are of different sizes, different pressures will be generated at different locations within the chamber after the vacuum pump 500 is turned on during the production process. If we assume that the pressures at the locations of the multiple heating grids 200 along the first direction are P1, P2, up to Pn, where n is equal to the number of heating grids 200 N, then the pressure gradually decreases from P1 to Pn.

[0074] In some embodiments, the pressure difference between any two adjacent heating grids 200 is 0.005 kPa to 0.01 kPa, in order to control the smooth flow of gas within the housing 100 in the first direction.

[0075] In one specific embodiment, the number of heating meshes 200 is 5, then P1 is -0.02kPa to -0.01kPa, P2 is -0.03kPa to -0.02kPa, P3 is -0.04kPa to -0.03kPa, P4 is -0.05kPa to -0.04kPa, and P5 is -0.06kPa to -0.05kPa.

[0076] It is understandable that when the heating mechanism 20 includes a vacuum pump 500, the temperatures of the multiple heating grids 200 can be the same or different. When the temperatures are the same, the temperature of the heating grids 200 can be controlled within the range of 100℃ to 200℃. When the temperatures of the multiple heating grids 200 are different, the temperature of the heating grids 200 is controlled within the range of 100℃ to 200℃, and the temperature of the heating grids 200 gradually decreases along the first direction.

[0077] This application utilizes the pressure difference principle within the "tower-shaped structure" shell 100 to control the smooth flow of gas within the shell 100 along the first direction, enabling the moisture in the electrode sheet 40 to be quickly removed from the surface of the active layer at a certain baking temperature, thereby further shortening the drying time of the electrode sheet 40.

[0078] In some embodiments, the electrode drying apparatus 1 further includes a recovery component 600. When the electrode drying apparatus 1 does not include a vacuum pump 500, the recovery component 600 is connected to the housing 100 through a through hole 800 at one end of the housing 100. When the electrode drying apparatus 1 includes a vacuum pump 500, the vacuum pump 500 is connected to the housing 100 through the through hole 800, and the recovery component 600 is connected to the vacuum pump 500.

[0079] In some embodiments, the inner surface of the housing 100 is provided with a water-absorbing layer 700, which locks in moisture through the strong water absorption of the water-absorbing layer 700, preventing moisture from adsorbing on the inner wall of the heating mechanism 20 and keeping the heating mechanism 20 dry at all times.

[0080] In some embodiments, the absorbent layer 700 is a superabsorbent resin layer, which includes at least one of polyacrylate resins (e.g., sodium polyacrylate, polyacrylamide), starch-based resins, cellulose-based resins, polyvinyl alcohol (PVA) resins, and organic-inorganic composite resins.

[0081] In some embodiments, the housing 100 has a double-layer structure, including an inner metal housing 110 and an insulation layer 120 covering the outer surface of the metal housing 110.

[0082] It is understood that this application does not impose any particular limitation on the material of the metal casing 110. Without departing from the overall inventive concept of this application, any known metallic material can be used in this application. As an example only, the material of the metal casing 110 includes one or more of copper, aluminum, and stainless steel.

[0083] In some embodiments, the insulation layer 120 includes one or more of foam insulation layer 120, polyurethane insulation layer 120, polystyrene insulation layer 120, and aerogel insulation layer 120.

[0084] In some embodiments, the electrode drying apparatus 1 further includes an unwinding mechanism. The unwinding mechanism 10 is located upstream of the heating mechanism 20 and is used to unwind the electrode sheet 40.

[0085] In some embodiments, the electrode drying apparatus 1 further includes a winding mechanism 30. The winding mechanism 30 is located downstream of the heating mechanism 20 and is used to wind up the electrode sheet 40.

[0086] In some embodiments, the distance between the heating mechanism 20 and the electrode plate 40 is 2cm to 5cm, including but not limited to 2cm, 3cm, 4cm and 5cm.

[0087] In some embodiments, the diameter of the heating mesh 200 near the electrode plate 40 in the heating mechanism 20 is 5cm to 10cm larger than the width of the electrode plate 40. This is to ensure that the central material area of ​​the electrode plate 40 is heated evenly during the drying process.

[0088] According to some embodiments of this application, see Figures 3 to 4This application provides an electrode drying apparatus 1, including an unwinding mechanism 10, a winding mechanism 30, and a heating mechanism 20 disposed between the two. There are two heating mechanisms 20, symmetrically arranged on the upper and lower sides of the electrode 40. Each heating mechanism 20 includes a housing 100, heating meshes 200, a temperature detection component 300, a pressure detection component 400, a control component, a vacuum pump 500, and a recovery component 600. The housing 100 has an open end near the electrode 40 and a through hole 800 at the other end. The inner diameter of the housing 100 gradually decreases from the open end to the end with the through hole 800. The housing 100 contains a water-absorbing layer 700 for locking in moisture. Multiple heating meshes 200 are evenly spaced within the housing 100. The temperature detection component 300 includes multiple temperature sensors, each independently installed on the outside of the housing 100 at the location of one of the heating meshes 200, for detecting the temperature values ​​of the multiple heating meshes 200. The pressure detection assembly 400 includes multiple pressure sensors 410, each independently installed on the exterior of the housing 100 at a location corresponding to one of the multiple heating grids 200, for detecting the pressure at the location of the heating grids 200. A vacuum pump 500 is connected to the housing 100 via a pipe through a through-hole 800. A control assembly is communicatively connected to the temperature detection assembly 300 and the pressure detection assembly 400, for adjusting the input power of each heating grid 200 in real time based on the temperature value fed back by the temperature detection assembly 300, thereby regulating the temperature of the heating grids 200; and for adjusting the rotational speed of the vacuum pump 500 in real time based on the pressure value fed back by the pressure detection assembly 400, thereby regulating the pressure inside the housing 100. A recovery assembly 600 is connected to the vacuum pump 500 via a pipe.

[0089] The second aspect of this application provides a battery manufacturing apparatus, including the electrode drying apparatus 1 as provided in the first aspect of this application.

[0090] In some embodiments, the battery production equipment also includes a coating device located upstream of the electrode drying device 1, which is used to coat a slurry onto a substrate to prepare an electrode sheet. The electrode sheet 40 formed after coating is then passed through the electrode drying device 1 to remove moisture from the electrode sheet 40.

[0091] 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 specification.

[0092] The above embodiments merely illustrate several implementation methods of this application, and 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 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 patent application should be determined by the appended claims.

Claims

1. An electrode drying apparatus, characterized in that, include: A housing, one end of which is open and the other end is provided with a through hole, the inner wall of which gradually narrows from the open end to the end with the through hole; Multiple heating grids are spaced apart inside the housing from one end to the other. A vacuum pump is connected to the housing through the through hole; A temperature detection component, installed on the housing, is used to detect the temperature values ​​of the multiple heating grids; A pressure detection component, installed on the housing, is used to detect the pressure at the locations of the multiple heating grids.

2. The electrode drying apparatus according to claim 1, characterized in that, The electrode drying device further includes: A control component, communicatively connected to the temperature detection component, is used to adjust the input power of the heating network according to the temperature value; Furthermore, the air pressure detection component and the vacuum pump are communicatively connected to the control component, and the control component controls the speed of the vacuum pump according to the pressure.

3. The electrode drying apparatus according to claim 2, characterized in that, The electrode drying device also includes a recovery component, which is connected to the vacuum pump.

4. The electrode drying apparatus according to claim 1, characterized in that, The number of heating meshes is N, where N ≥ 5 and is an integer.

5. The electrode drying apparatus according to claim 4, characterized in that, 5≤N≤7。 6. The electrode drying apparatus according to any one of claims 1 to 5, characterized in that, The distance between any two adjacent heating grids is 10cm to 20cm.

7. The electrode drying apparatus according to any one of claims 1 to 5, characterized in that, The heating mesh has an aperture size of 100 mesh to 200 mesh.

8. The electrode drying apparatus according to any one of claims 1 to 5, characterized in that, The inner surface of the shell is provided with a water-absorbing layer.

9. The electrode drying apparatus according to any one of claims 1 to 5, characterized in that, The housing includes a metal housing; The outer surface of the metal casing is connected to an insulation layer.

10. A battery manufacturing apparatus, characterized in that, Includes the electrode drying apparatus as described in any one of claims 1 to 9.

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