Drying apparatus and pole piece production device

Abstract

A drying apparatus and a pole piece production device. The drying apparatus comprises a first drying component and a second drying component. Hot air can enter a first drying cavity of the first drying component through a first air inlet and dry the intermediate material strip passing through the first drying cavity; the hot air can also enter a second drying cavity of the second drying component through a second air inlet and dry the pole piece material strip passing through the second drying cavity. The closer to the discharging end, the lower the content of the solvent in the first drying cavity and the second drying cavity is. When the content of the solvent is lower than a threshold value, hot air discharged from the first air outlets of the rear m first drying cavities can enter through the second air inlets of the front m second drying cavities so as to dry the pole piece material strip. Hot air discharged from the second air outlets of the rear n second drying cavities can also enter through the first air inlets of the front n first drying cavities so as to dry the intermediate material strip.

Description

Drying device and electrode production equipment

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on August 23, 2023, with application number 202322264512.6 and application name “Drying Device and Electrode Production Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to a drying device and electrode production equipment. Background Art

[0003] During the electrode forming process, coating is performed on both sides of the substrate. Typically, after coating one side of the substrate, it is first dried to dry the coating. Once the coating is dried, the other side can be coated and dried again. Existing drying ovens typically use electric heating or dry hot air to achieve drying. The electrode undergoes multiple drying steps during the forming process, resulting in high energy consumption.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a drying device and electrode production equipment that can reduce energy consumption to address the above problems.

[0006] A drying device, comprising:

[0007] A first drying component is formed with a plurality of first drying chambers connected in sequence between a feeding end and a discharging end, each of the first drying chambers having a first air inlet and a first air outlet; and

[0008] A second drying component is formed with a plurality of second drying chambers connected in sequence between the feeding end and the discharging end, each of the second drying chambers having a second air inlet and a second air outlet;

[0009] Particularly, the first air outlets of the last m first drying chambers of the first drying component are connected to the second air inlets of the first m second drying chambers of the second drying component; the second air outlets of the last n second drying chambers of the second drying component are connected to the first air inlets of the first n first drying chambers of the first drying component.

[0010] In one embodiment, the first drying assembly includes a plurality of first ovens connected end to end, each of which has the first drying chamber formed therein; the second drying assembly includes a plurality of second ovens connected end to end, each of which has the second drying chamber formed therein.

[0011] In one embodiment, the first drying component and the second drying component are both in an elongated shape, and the first drying component and the second drying component are stacked.

[0012] In one embodiment, the feed end of the first drying component and the discharge end of the second drying component are located at the same end, and the discharge end of the first drying component and the feed end of the second drying component are located at the same end.

[0013] In one embodiment, the number of the first drying chambers is equal to the number of the second drying chambers, and m is equal to n.

[0014] In one embodiment, a circulation component is further included, which includes a heat exchanger, a filter, an exhaust gas pipeline and a recovery pipeline. One end of the exhaust gas pipeline is connected to at least part of the first air outlet and at least part of the second air outlet, and the other end is connected to the inlet of the filter. One end of the recovery pipeline is connected to the outlet of the filter, and the other end is connected to at least part of the first air inlet and at least part of the second air inlet. Both the exhaust gas pipeline and the recovery pipeline pass through the heat exchanger and can exchange heat.

[0015] In one embodiment, the circulation component further includes a fresh air pipeline and an exhaust pipeline, the fresh air pipeline is connected to the recovery pipeline, and the exhaust pipeline is connected to the tail gas pipeline.

[0016] In one embodiment, the circulation component further includes a temperature compensation pipeline, and the temperature compensation pipeline is connected to the recovery pipeline.

[0017] In one embodiment, a circulation pump is provided on at least one of the exhaust gas pipeline and the recovery pipeline.

[0018] In one embodiment, the solvent contents in the last m first drying chambers of the first drying assembly and the last n second drying chambers of the second drying assembly are both lower than a threshold value.

[0019] A pole piece production device, comprising:

[0020] A drying device as described in any one of the above preferred embodiments;

[0021] A first coating device is capable of coating the first surface of the substrate and obtaining an intermediate strip, wherein the intermediate strip output by the first coating device can enter the first drying assembly and sequentially pass through the plurality of first drying chambers; and

[0022] The second coating device, the intermediate material strip output by the first drying component can enter the second coating device, and the second coating device coats the second side of the substrate to obtain the electrode material strip, and the electrode material strip output by the second coating device can enter the second drying component and pass through multiple second drying chambers in sequence.

[0023] In the drying device and electrode production equipment described above, hot air can enter the first drying chamber through the first air inlet and dry the intermediate material strip passing through the first drying chamber; hot air can also enter the second drying chamber through the second air inlet and dry the electrode material strip passing through the second drying chamber. The closer to the discharge end, the lower the solvent content in the first and second drying chambers. When the solvent content is lower than the threshold, the hot air discharged from the first air outlets of the last m first drying chambers can be input through the second air inlets of the first m second drying chambers to dry the electrode material strip. The hot air discharged from the second air outlets of the last n second drying chambers can also be input through the first air inlets of the first n first drying chambers to dry the intermediate material strip. This shows that part of the hot air can be recycled, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 these drawings without any creative work.

[0025] FIG1 is a schematic structural diagram of a pole piece production device according to a preferred embodiment of the present disclosure;

[0026] FIG2 is a schematic structural diagram of a drying device in the electrode production equipment shown in FIG1 ;

[0027] FIG3 is a schematic structural diagram of the first oven in the drying device shown in FIG2 ;

[0028] FIG4 is a schematic structural diagram of the second oven in the drying device shown in FIG2 ;

[0029] FIG5 is a schematic diagram of a module of a circulation component in the drying device shown in FIG2 . DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present disclosure more clearly understood, specific embodiments of the present disclosure 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 disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.

[0031] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this disclosure, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0034] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when 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. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] 1 , the present disclosure provides a pole piece production device 10 and a drying device 100 . The pole piece production device 10 includes the drying device 100 , a first coating device 200 , and a second coating device 300 .

[0037] The electrode production equipment 10 can prepare electrodes using a substrate, which can be aluminum foil or copper foil. The first coating device 200 can coat the first side of the substrate and obtain an intermediate material strip, and the second coating device 300 can coat the convex portion of the second side of the substrate and obtain a electrode material strip. After the first coating device 200 completes coating, the intermediate material strip output by the first coating device 200 can enter the drying device 100 to dry the coating on the first side; after drying, the intermediate material strip output by the drying device 100 can enter the second coating device 300 to coat the second side; after the second coating device 300 completes coating, the electrode material strip output by the second coating device 300 can enter the drying device 100 again to dry the coating on the second side.

[0038] Please refer to FIG. 2 . The drying device 100 in the preferred embodiment of the present disclosure includes a first drying component 110 and a second drying component 120 .

[0039] The first drying assembly 110 includes a feed end and a discharge end, with a plurality of sequentially connected first drying chambers 101 formed between the feed end and the discharge end. The intermediate web output by the first coating device 200 can enter the first drying assembly 110 from the feed end, pass through the plurality of first drying chambers 101 in sequence, and then be output from the discharge end.

[0040] Each first drying chamber 101 has a first air inlet 1111 and a first air outlet 1112. Hot, dry air enters the first drying chamber 101 through the first air inlet 1111 to evaporate the solvent in the coating, thereby drying the intermediate web passing through the first drying chamber 101. The air containing the solvent in the first drying chamber 101 is then discharged through the first air outlet 1112.

[0041] Moreover, since the coating of the intermediate material belt will gradually dry during the process of transporting the intermediate material belt from the feed end to the discharge end of the first drying component 110, the solvent content in the first drying chamber 101 closer to the feed end is higher, and the solvent content in the first drying chamber 101 closer to the discharge end is lower.

[0042] Please also refer to FIG. 3 . In this embodiment, the first drying assembly 110 includes a plurality of first drying ovens 111 connected end to end. A first drying chamber 101 is formed in each first drying oven 111 .

[0043] The first drying ovens 111 can be connected in a detachable manner. Thus, by splicing multiple first drying ovens 111 together, the first drying assembly 110 can be formed, making assembly more convenient. Furthermore, the number of first drying ovens 111 to be spliced ​​can be selected as needed to obtain the desired number of first drying chambers 101. Furthermore, each first drying oven 111 is provided with a first air inlet 1111 and a first air outlet 1112.

[0044] It should be noted that, in other embodiments, a plurality of first drying chambers 101 that are connected in sequence may also be processed in the same housing or base.

[0045] The structure and function of the second drying assembly 120 are substantially the same as those of the first drying assembly 110. The second drying assembly 120 includes a feed end and a discharge end, with multiple, sequentially connected second drying chambers 102 formed between the feed end and the discharge end. The electrode strip discharged from the second coating device 300 enters the second drying assembly 120 from the feed end, passes through the multiple second drying chambers 102 in sequence, and exits the discharge end.

[0046] Furthermore, each second drying chamber 102 has a second air inlet 1211 and a second air outlet 1212. Dry hot air can enter the second drying chamber 102 through the second air inlet 1211 to evaporate the solvent in the coating and dry the electrode strip passing through the second drying chamber 102; and the air containing the solvent in the second drying chamber 102 can be discharged through the second air outlet 1212.

[0047] Moreover, since the coating of the electrode material strip will gradually dry during the process of transporting the electrode material strip from the feed end to the discharge end of the second drying component 120, the solvent content of the air in the second drying chamber 102 closer to the feed end is higher, and the solvent content of the air in the second drying chamber 102 closer to the discharge end is lower.

[0048] 4 , in this embodiment, the second drying assembly 120 includes a plurality of second drying ovens 121 connected end to end, each of which has a second drying chamber 102 formed therein. Furthermore, each second drying oven 121 is provided with a second air inlet 1211 and a second air outlet 1212 .

[0049] Please refer to FIG. 2 again. The first air outlets 1112 of the last m first drying chambers 101 of the first drying assembly 110 are in communication with the second air inlets 1211 of the first m second drying chambers 102 of the second drying assembly 120 .

[0050] m is an integer greater than or equal to 1. The last m first drying chambers 101 of the first drying assembly 110 refer to the m first drying chambers 101 located near the discharge end of the first drying assembly 110. For example, the first drying assembly 110 has a total of eight first drying chambers 101, with the feed end on the right and the discharge end on the left. When m is 2, the last m first drying chambers 101 of the first drying assembly 110 refer to the seventh and eighth first drying chambers 101, counting from right to left.

[0051] The first m second drying chambers 102 of the second drying assembly 120 refer to the m first drying chambers 101 near the feed end of the second drying assembly 120. When the feed end of the second drying assembly 120 is on the left and the discharge end is on the right, and m is 2, the first m second drying chambers 102 of the second drying assembly 120 refer to the first and second second drying chambers 102 counted from left to right.

[0052] In other words, the hot air exhausted from the last m first drying chambers 101 of the first drying assembly 110 can serve as input to the first m second drying chambers 102 of the second drying assembly 120. Because the solvent content in the first drying chambers 101 closer to the discharge end is lower, while the solvent content in the second drying chambers 102 closer to the feed end is higher, when the solvent content in the first drying chambers 101 is below a threshold, the hot air exhausted from the first drying chambers 101 can serve as input to the second drying chambers 102 without adversely affecting the drying performance of the second drying chambers 102.

[0053] Furthermore, the second air outlets 1212 of the last n second drying chambers 102 of the second drying assembly 120 are in communication with the first air inlets 1111 of the first n first drying chambers 101 of the first drying assembly 110 .

[0054] Similarly, n is an integer greater than or equal to 1. The last n second drying chambers 102 of the second drying assembly 120 refer to the n second drying chambers 102 located near the discharge end of the second drying assembly 120. For example, the second drying assembly 120 has a total of eight second drying chambers 102, with the feed end on the left and the discharge end on the right. When n is 2, the last n second drying chambers 102 of the second drying assembly 120 refer to the seventh and eighth second drying chambers 102, counting from left to right.

[0055] The first n first drying chambers 101 of the first drying assembly 110 refer to the n first drying chambers 101 near the feed end of the first drying assembly 110. When the feed end of the first drying assembly 110 is on the right and the discharge end is on the left, and n is 2, the first n first drying chambers 101 of the first drying assembly 110 refer to the first and second first drying chambers 101 counted from right to left.

[0056] Because the solvent content in the second drying chamber 102 is lower near the discharge end, while the solvent content in the first drying chamber 101 is higher near the feed end, when the solvent content in the second drying chamber 102 is below a threshold, the hot air exhausted from the second drying chamber 102 can be used as input to the first drying chamber 101 without adversely affecting the drying performance of the first drying chamber 101. The solvent in the first and second drying chambers 101, 102, is typically NMP (N-methylpyrrolidone). The threshold can be set to 5%, 2%, or 1%, depending on the actual situation.

[0057] During actual use, the solvent content in the last m first drying chambers 101 of the first drying assembly 110 and the last n second drying chambers 102 of the second drying assembly 120 is below the threshold. This indicates that the hot air exhausted from the last m first drying chambers 101 can be used as input to the first m second drying chambers 102, and the hot air exhausted from the last n second drying chambers 102 can be used as input to the first n first drying chambers 101. Therefore, some of the hot air can be recycled, thereby reducing energy consumption.

[0058] Specifically, in this embodiment, the number of first drying chambers 101 is equal to the number of second drying chambers 102, and m is equal to n. The values ​​of m and n can be determined based on specific operating conditions. It is sufficient to ensure that the solvent content in the last m first drying chambers 101 and the last n second drying chambers 102 is below a threshold.

[0059] In this embodiment, the first drying assembly 110 and the second drying assembly 120 are both in the shape of elongated strips, and the first drying assembly 110 and the second drying assembly 120 are stacked. This can reduce the length of the drying device 100 and save space.

[0060] Furthermore, in this embodiment, the feeding end of the first drying component 110 and the discharging end of the second drying component 120 are located at the same end, and the discharging end of the first drying component 110 and the feeding end of the second drying component 120 are located at the same end.

[0061] In other words, the first drying assembly 110 and the second drying assembly 120 are arranged end to end in reverse order. Therefore, when connecting the last m and first n first drying chambers 101 of the first drying assembly 110 to the first m and last n second drying chambers 102 of the second drying assembly 120, respectively, the distance between the first drying chamber 101 and the second drying chamber 102 to be connected is smaller, thereby significantly reducing the length of the connecting pipes and reducing the difficulty of operation.

[0062] Please refer to FIG. 5 . In this embodiment, the drying device 100 further includes a circulation component 130 . The circulation component 130 includes a heat exchanger 131 , a filter 132 , an exhaust gas pipeline 133 , and a recovery pipeline 134 . One end of the exhaust gas pipeline 133 is connected to at least a portion of the first air outlet 1112 and at least a portion of the second air outlet 1212 , and the other end is connected to the inlet of the filter 132 . One end of the recovery pipeline 134 is connected to the outlet of the filter 132 , and the other end is connected to at least a portion of the first air inlet 1111 and at least a portion of the second air inlet 1211 . Both the exhaust gas pipeline 133 and the recovery pipeline 134 pass through the heat exchanger 131 and are capable of heat exchange.

[0063] The first drying chamber 101 connected to the exhaust pipe 133 and the recovery pipe 134 is generally the first drying chamber 101 between the last m and the first n; and the second drying chamber 102 connected to the exhaust pipe 133 and the recovery pipe 134 is generally the second drying chamber 102 between the last n and the first m.

[0064] The hot air in the first drying chamber 101 and the second drying chamber 102 can be discharged from the exhaust pipe 133 through the first air outlet 1112 and the second air outlet 1212, respectively, and then enter the filter 132 after passing through the heat exchanger 131. The heat in the hot air can be exchanged with the air in the recovery pipe 134 at the heat exchanger 131, so that the air entering the filter 132 becomes cold air. The filter 132 can filter out the solvent in the cold air, thereby obtaining dry cold air, which is discharged through the recovery pipe 134. The dry cold air in the recovery pipe 134 then exchanges heat with the hot air in the exhaust pipe 133 at the heat exchanger 131 to obtain dry hot air, which then enters the first drying chamber 101 and the second drying chamber 102 through the first air inlet 1111 and the second air inlet 1211, respectively. Thus, by providing the circulation component 130, the hot air can be recycled, thereby further reducing energy consumption.

[0065] In order to allow the hot air in the first drying chamber 101 and the second drying chamber 102 to smoothly enter the circulation component 130 and circulate, specifically in this embodiment, a circulation pump 138 is provided on at least one of the exhaust pipe 133 and the recovery pipe 134 .

[0066] Furthermore, in this embodiment, the circulation component 130 further includes a fresh air pipeline 135 and an exhaust pipeline 136 . The fresh air pipeline 135 is connected to the recovery pipeline 134 , and the exhaust pipeline 136 is connected to the exhaust pipeline 133 .

[0067] The other end of the fresh air duct 135 can be connected to an air source, while the other end of the exhaust duct 136 can be connected to an exhaust tank or the atmosphere. After drying is complete, the hot air in the first and second drying chambers 101, 102 is exhausted through the exhaust duct 136. When drying is restarted, the fresh air duct 135 can be used to re-introduce dry hot air into the first and second drying chambers 101, 102.

[0068] In this embodiment, the circulation assembly 130 also includes a temperature compensation line 137, which is connected to the recovery line 134. After the hot air circulates several times within the circulation assembly 130, its temperature may drop to a relatively low level. In this case, the temperature compensation line 137 can be used to introduce higher-temperature hot air into the recovery line 134, thereby raising the temperature of the hot air entering the first drying chamber 101 and the second drying chamber 102 to ensure a satisfactory drying effect.

[0069] In the drying device 100 and electrode production equipment 10, hot air can enter the first drying chamber 101 through the first air inlet 1111 to dry the intermediate strip of material passing through the first drying chamber 101. Hot air can also enter the second drying chamber 102 through the second air inlet 1211 to dry the electrode strip of material passing through the second drying chamber 102. The solvent content in the first and second drying chambers 101, 102, decreases as the material is closer to the discharge end. When the solvent content falls below a threshold, the hot air exhausted from the first air outlets 1112 of the last m first drying chambers 101 can be fed into the second air inlets 1211 of the first m second drying chambers 102 to dry the electrode strip of material. Furthermore, the hot air exhausted from the second air outlets 1212 of the last n second drying chambers 102 can be fed into the first air inlets 1111 of the first n first drying chambers 101 to dry the intermediate strip of material. This allows some of the hot air to be recycled, thereby reducing energy consumption.

[0070] 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.

[0071] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art could make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present patent shall be determined by the appended claims.

Claims

1. A drying device, comprising: A first drying component, wherein a plurality of first drying chambers are formed between a feeding end and a discharging end and are connected in sequence, and each of the first drying chambers has a first air inlet and a first air outlet; and A second drying component, wherein a plurality of second drying chambers are formed between the feeding end and the discharging end and are connected in sequence, and each of the second drying chambers has a second air inlet and a second air outlet; Among them, the first air outlet of the last m first drying chambers of the first drying component is connected to the second air inlet of the first m second drying chambers of the second drying component; the second air outlet of the last n second drying chambers of the second drying component is connected to the first air inlet of the first n first drying chambers of the first drying component.

2. The drying device according to claim 1, wherein: The first drying assembly includes a plurality of first ovens connected end to end, each of which has the first drying chamber formed therein; the second drying assembly includes a plurality of second ovens connected end to end, each of which has the second drying chamber formed therein.

3. The drying device according to claim 1 or 2, wherein: The first drying component and the second drying component are both in a long strip shape, and the first drying component and the second drying component are stacked.

4. The drying device according to any one of claims 1 to 3, wherein: The feeding end of the first drying component and the discharging end of the second drying component are located at the same end, and the discharging end of the first drying component and the feeding end of the second drying component are located at the same end.

5. The drying device according to any one of claims 1 to 4, wherein: The number of the first drying chambers is equal to the number of the second drying chambers, and m is equal to n.

6. The drying device according to any one of claims 1 to 5, wherein: It also includes a circulation component, which includes a heat exchanger, a filter, an exhaust gas pipeline and a recovery pipeline. One end of the exhaust gas pipeline is connected to at least part of the first air outlet and at least part of the second air outlet, and the other end is connected to the inlet of the filter. One end of the recovery pipeline is connected to the outlet of the filter, and the other end is connected to at least part of the first air inlet and at least part of the second air inlet. The exhaust gas pipeline and the recovery pipeline both pass through the heat exchanger and can exchange heat.

7. The drying device according to claim 6, wherein: The circulation component also includes a fresh air pipeline and an exhaust air pipeline. The fresh air pipeline is connected to the recovery pipeline, and the exhaust air pipeline is connected to the tail gas pipeline.

8. The drying device according to claim 6 or 7, wherein: The circulation component further includes a temperature compensation pipeline, and the temperature compensation pipeline is communicated with the recovery pipeline.

9. The drying device according to any one of claims 6 to 8, wherein: At least one of the exhaust gas pipeline and the recovery pipeline is provided with a circulation pump.

10. The drying device according to any one of claims 1 to 9, wherein: The contents of the solvent in the last m first drying chambers of the first drying assembly and the last n second drying chambers of the second drying assembly are both lower than a threshold value.

11. A pole piece production device, comprising: A drying device as claimed in any one of claims 1 to 10; A first coating device, capable of coating the first surface of the substrate and obtaining an intermediate material strip, wherein the intermediate material strip output by the first coating device can enter the first drying component and sequentially pass through the plurality of first drying chambers; and The second coating device, the intermediate material strip output by the first drying component can enter the second coating device, and the second coating device coats the second side of the substrate to obtain the pole piece material strip, and the pole piece material strip output by the second coating device can enter the second drying component and pass through multiple second drying chambers in sequence.

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