Pole piece baking device and battery production system

Abstract

The utility model discloses a pole piece baking device and a battery production system. The pole piece baking device comprises a box body, a guide roller assembly and a heating part. Wherein a containing space is formed in the box body, a guide-in opening is formed in one side of the box body, and a guide-out opening is formed in the other side of the box body. The guide roller assembly is located in the containing space and comprises an initial guide roller, a tail end guide roller and a middle guide roller, the initial guide roller, the tail end guide roller and the middle guide roller are all installed in the box body and can rotate relative to the box body, and the axes of the initial guide roller, the tail end guide roller and the middle guide roller are parallel to one another; in the height direction of the box body, the middle guide roller is located on the same side of the initial guide roller and the tail end guide roller. Therefore, the distance between the initial guide roller and the tail end guide roller can be shortened, the occupied space of the box body is reduced on the premise that the width of the box body is not changed, meanwhile, the stress releasing time of the pole piece can be shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to a battery manufacturing equipment, specifically an electrode baking device and a battery production system. Background Technology

[0002] The baking oven in the baking device for baking battery electrodes has conveyor rollers inside that transport the electrodes. The conveyor rollers are arranged in a straight line, which allows the electrodes to be transported over a long distance during the baking process. This allows for better control of the baking temperature at different positions of the electrodes. However, this type of oven is relatively long, which causes the baking device to occupy a large amount of space. Utility Model Content

[0003] In view of the above problems, this application provides an electrode baking device that can improve the problem of large space occupation of battery electrode ovens.

[0004] In a first aspect, this application provides an electrode baking apparatus, comprising:

[0005] The box has an internal storage space, an inlet on one side, and an outlet on the other side.

[0006] The guide roller assembly is located within the housing space. The guide roller assembly includes an initial guide roller, an end guide roller, and an intermediate guide roller. The initial guide roller, the end guide roller, and the intermediate guide roller are all installed inside the housing and can rotate relative to the housing. The axes of the initial guide roller, the end guide roller, and the intermediate guide roller are parallel to each other. Along the height direction of the housing, the intermediate guide roller is located on the same side as the initial guide roller and the end guide roller.

[0007] A heating element is located within the housing space and is used to heat the electrode sheet.

[0008] On the one hand, the intermediate guide roller is located on one side of the initial guide roller and the end guide roller. Compared with the initial guide roller, the end guide roller, and the intermediate guide roller being arranged in a straight line, the distance between the initial guide roller and the end guide roller can be shortened, thereby shortening the length of the housing and reducing the footprint of the housing without changing its width. On the other hand, after the electrode is cold-pressed, stress is generated inside the electrode, causing it to easily rebound. It is necessary to let the electrode stand at room temperature for a period of time before proceeding with subsequent processes. However, by using an electrode baking device to bake the electrode, the stress of the electrode can be released in advance, thereby shortening the time required for the electrode to stand at room temperature to release stress and improving production efficiency.

[0009] In some embodiments, along the height direction of the housing, the intermediate guide roller is located above the initial guide roller and the end guide roller.

[0010] Therefore, the space in the height direction of the box can be used to arrange the intermediate guide rollers to shorten the distance between the intermediate guide rollers and the end guide rollers, thereby shortening the length of the box and reducing the space occupied in the length direction of the box.

[0011] In some embodiments, there are multiple intermediate guide rollers, which are spaced apart along the conveying direction of the guide roller assembly.

[0012] The number of intermediate guide rollers increases the number of support positions for the electrode sheets, reducing the probability of the electrode sheets being stretched too long due to weight and wrinkling due to insufficient support positions, thereby improving the product qualification rate. At the same time, it also increases the conveying dimension of the electrode sheets along the height direction of the box, thereby increasing the length of the electrode sheets conveyed into the box and thus increasing the baking area of ​​the electrode sheets.

[0013] In some embodiments, the number of intermediate guide rollers is at least three, and at least a portion of the intermediate guide rollers are spaced apart from another portion of the intermediate guide rollers along a first direction, the first direction being perpendicular to the height direction of the housing and the axis of the intermediate guide rollers, respectively.

[0014] Therefore, the conveying length of the electrode can be further increased to increase the baking area of ​​the electrode. Under the premise that the electrode conveying speed remains unchanged, the baking time of the electrode can be extended, thereby improving the baking effect of the electrode.

[0015] In some embodiments, the distance between the axis of the initial guide roller and the axis of the intermediate guide roller is H1, and the value of H1 is between 0.6m and 0.8m; and / or, the distance between the axis of the intermediate guide roller and the axis of the end guide roller is H2, and the value of H2 is between 0.6m and 0.8m.

[0016] H1 = 0.6m and / or H2 = 0.6m can basically meet the electrode arrangement spacing, reducing the probability of the electrode wrinkling due to too many support positions caused by too small a spacing. As H1 and / or H2 increase, the spacing between two adjacent support positions of the electrode increases, and the electrode is prone to wrinkling between two adjacent support positions. Therefore, in order to balance the probability of wrinkling due to too many support positions caused by too small a spacing of the electrode, and the probability of the electrode being stretched too long under its own weight and wrinkling due to too many adjacent support positions, the value range of H1 and / or H2 is set between 0.6m and 0.8m.

[0017] In some embodiments, the number of intermediate guide rollers is multiple.

[0018] Multiple intermediate guide rollers have parallel axes that are spaced apart. Along the conveying direction of the guide roller assembly, the distance between the axes of two adjacent intermediate guide rollers is H3, where H3 ranges from 0.6m to 0.8m.

[0019] And / or, along the conveying direction of the guide roller assembly, the distance between the axis of the intermediate guide roller closest to the initial guide roller and the axis of the initial guide roller is H1, where H1 ranges from 0.6m to 0.8m.

[0020] And / or, along the conveying direction of the guide roller assembly, the distance between the axis of the intermediate guide roller closest to the end guide roller and the axis of the end guide roller is H2, and the value of H2 is between 0.6m and 0.8m.

[0021] This reduces the probability of wrinkles occurring when the two support positions of the electrode are too close or too far apart.

[0022] In some embodiments, the wrap angle between the intermediate guide roller and the electrode sheet is α, where α is greater than 0° and less than 90°.

[0023] An excessively large wrap angle 'a' increases the area of ​​the electrode sheet wrapped around the intermediate guide roller, increasing the probability of cracking or wrinkling. Therefore, to reduce the probability of cracking or wrinkling, 'a' is set to be greater than 0° and less than 90°.

[0024] In some embodiments, there are multiple heating elements, which are spaced apart along the conveying direction of the guide roller assembly.

[0025] This allows for heating of multiple locations on the electrode, reducing the probability of localized overheating or underheating, thus ensuring more uniform heating and improving the baking effect.

[0026] In some embodiments, the electrode baking apparatus further includes a shielding member, wherein at least a portion of the heating elements are provided with a shielding member on one side, the shielding member extending along the axial direction of the intermediate guide roller, and the shielding member is used to block the heating elements from transferring part of the heat to the electrode.

[0027] During the heating process, the local temperature of the electrode may become too high. Placing the shielding component at the location where the electrode temperature is too high can block some of the heat from passing through the electrode, thereby reducing the temperature difference between different parts of the electrode and making the electrode heat up more evenly during the heating process. This results in more consistent stress release on the electrode and improves the uniformity of the electrode thickness.

[0028] In some embodiments, the electrode baking apparatus further includes:

[0029] An ambient temperature sensor is installed within the enclosure to detect the ambient temperature inside the enclosure.

[0030] Therefore, the temperature inside the oven can be detected by an ambient temperature sensor, and the ambient temperature inside the oven can be adjusted in time when the temperature deviates from the preset temperature, thereby improving the baking effect.

[0031] In some embodiments, the electrode baking apparatus further includes:

[0032] An electrode temperature sensor is installed within the housing space to detect the temperature of the electrode.

[0033] Therefore, the temperature inside the chamber can be adjusted according to the detected electrode temperature to reduce the probability of the electrode temperature being too high or too low, thereby improving the baking effect of the electrode.

[0034] Secondly, this application provides a battery production system, including an electrode baking apparatus as described in the first aspect, which is used to heat the cold-pressed electrode.

[0035] During the cold pressing process, stress easily accumulates within the electrode. After cold pressing, this stress is released, causing the electrode to rebound. Therefore, after cold pressing, the electrode needs to be allowed to stand for a period of time before proceeding to the next process. Baking the electrode after cold pressing using a baking device can release internal stress in advance, reducing the resting time and improving production efficiency. Simultaneously, it reduces the probability of significant thickness variations due to insufficient stress release during room temperature resting, thus improving electrode thickness consistency.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This is a cross-sectional view of an electrode baking apparatus according to an embodiment of this application. The cross-section of the electrode baking apparatus is perpendicular to the axis of the intermediate guide roller.

[0039] Figure 2 for Figure 1 A partial structural diagram showing the positional relationship between the intermediate guide roller and the electrode in an electrode baking apparatus.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] 100. Electrode baking device;

[0042] 10. Housing; 11. Inlet; 12. Outlet; 20. Guide roller assembly; 21. Initial guide roller; 22. End guide roller; 23. Intermediate guide roller; 30. Heating component; 40. Ambient temperature sensor; 50. Electrode temperature sensor; 60. Shielding component;

[0043] 200, Electrode;

[0044] X represents the altitude; Y represents the primary direction. Detailed Implementation

[0045] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0048] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0051] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] The ovens used for baking battery electrodes typically have conveyor rollers arranged in a straight line along the length of the oven body, which occupies a large dimension along the length of the oven body, resulting in a long oven body and a large space occupied by the oven body.

[0054] In view of this, this application provides an electrode baking device, in which an intermediate guide roller is set on one side of the initial guide roller and the end guide roller. During the electrode conveying process, the electrode can be conveyed along a curved path, which can increase the length of the electrode in the chamber and enable heating of a larger area of ​​electrode. Under the premise that the drying temperature of the chamber remains unchanged, the drying efficiency of the electrode can be improved. At the same time, the distance between the initial guide roller and the end guide roller can be shortened, thereby shortening the length of the chamber and reducing the footprint of the chamber without changing the width of the chamber.

[0055] The electrode baking apparatus of this application can be used for, but is not limited to, baking of electrodes after cold pressing.

[0056] For ease of explanation, please refer to the following embodiments. Figure 1 The following description will be based on an example of an electrode baking apparatus 100 according to some embodiments of this application.

[0057] The electrode baking apparatus 100 includes a housing 10, a guide roller assembly 20, and a heating element 30. The housing 10 has an internal receiving space, an inlet 11 on one side, and an outlet 12 on the other side. The guide roller assembly 20 is located within the receiving space and includes an initial guide roller 21, an end guide roller 22, and an intermediate guide roller 23. All three rollers are installed within the housing 10 and can rotate relative to it. Their axes are parallel to each other along the height direction X of the housing 10, with the intermediate guide roller 23 located on the same side as the initial and end guide rollers. The heating element 30 is located within the receiving space and is used to heat the electrode 200.

[0058] The number of intermediate guide rollers 23 can be one or more, depending on the conveying speed of the electrode 200, the baking length of the electrode 200, and the baking time.

[0059] Without considering the input and output height of the electrode 200, the intermediate guide roller 23 can be positioned above or below the initial guide roller 21 and the end guide roller 22. When there are multiple intermediate guide rollers 23, all of them can be positioned above or below the initial guide roller 21 and the end guide roller 22.

[0060] The inlet 11 is the opening through which the electrode 200 enters, and the outlet 12 is the opening through which the electrode 200 exits. The inlet 11 and the outlet 12 can be located on opposite sides of the housing 10, and their heights can be set to be the same or different.

[0061] On the one hand, the intermediate guide roller 23 is located on one side of the initial guide roller 21 and the end guide roller 22. Compared with the arrangement of the initial guide roller 21, the end guide roller 22 and the intermediate guide roller 23 in a straight line, the distance between the initial guide roller 21 and the end guide roller 22 can be shortened, thereby shortening the length of the housing 10 and reducing the footprint of the housing 10 without changing its width. On the other hand, after the electrode 200 is cold-pressed, stress is generated inside the electrode 200, making it prone to rebound. It is necessary to let the electrode 200 stand at room temperature for a period of time before proceeding with subsequent processes. However, by using the electrode baking device 100 to bake the electrode 200, the stress of the electrode 200 can be released in advance, thereby shortening the time for the electrode 200 to stand at room temperature to release stress and improving production efficiency.

[0062] In some embodiments, please refer to Figure 1 Along the height direction X of the housing 10, the intermediate guide roller 23 is located above the initial guide roller 21 and the end guide roller 22.

[0063] Optionally, the number of intermediate guide rollers 23 located above the initial guide roller 21 and the end guide roller 22 can be one or more. Figure 1 The example shows that the number of intermediate guide rollers 23 is four.

[0064] Therefore, the intermediate guide roller 23 can be arranged in the space of the height direction X of the box 10 to shorten the distance between the intermediate guide roller 23 and the end guide roller 22, thereby shortening the length of the box 10 and reducing the space occupied by the box 10 in the length direction.

[0065] In some embodiments, please refer to Figure 1 There are multiple intermediate guide rollers 23, which are spaced apart along the conveying direction of the guide roller assembly 20.

[0066] The conveying direction of the guide roller assembly 20 guides the direction in which the guide roller assembly 200 drives the electrode sheet 200.

[0067] The number of intermediate guide rollers 23 is multiple, which can increase the support position of the electrode 200, thereby reducing the probability that the electrode 200 will be stretched too long due to weight and wrinkled because there are too few support positions, thus improving the product qualification rate. At the same time, it also increases the conveying dimension of the electrode 200 along the height direction X of the box 10, thereby increasing the length of the electrode 200 conveyed into the box 10, and thus increasing the baking area of ​​the electrode 200.

[0068] In some embodiments, please refer to Figure 1 The number of intermediate guide rollers 23 is at least three, and at least a portion of the intermediate guide rollers 23 are spaced apart from another portion of the intermediate guide rollers 23 along the first direction Y. The first direction Y is perpendicular to the height direction X of the housing 10 and the axis of the intermediate guide rollers 23, respectively.

[0069] Therefore, the conveying length of the electrode 200 can be further increased to increase the baking area of ​​the electrode 200. Under the premise that the conveying speed of the electrode 200 remains unchanged, the baking time of the electrode 200 can be extended, thereby improving the baking effect of the electrode 200.

[0070] In some embodiments, please refer to Figure 1 The distance between the axis of the initial guide roller 21 and the axis of the intermediate guide roller 23 is H1, and the value of H1 is between 0.6m and 0.8m. In some embodiments, the distance between the axis of the intermediate guide roller 23 and the axis of the end guide roller 22 is H2, and the value of H2 is between 0.6m and 0.8m.

[0071] H1 = 0.6m and / or H2 = 0.6m can basically meet the arrangement spacing of the electrode 200, so as to reduce the probability of wrinkling of the electrode 200 due to too small a spacing and too many support positions. As H1 and / or H2 increase, the spacing between two adjacent support positions of the electrode 200 increases. The electrode 200 is prone to wrinkling between two adjacent support positions. Therefore, in order to balance the probability of wrinkling of the electrode 200 due to too small a spacing and too many support positions, and the probability of the electrode 200 being stretched too long under its own weight and wrinkling due to too many adjacent support positions, the value range of H1 and / or H2 is set between 0.6m and 0.8m.

[0072] In some embodiments, please refer to Figure 1 There are multiple intermediate guide rollers 23, whose axes are parallel to each other and spaced apart. The distance between the axes of two adjacent intermediate guide rollers 23 is H3, and the value of H3 is between 0.6m and 0.8m. In some embodiments, there are multiple intermediate guide rollers 23, and along the conveying direction of the guide roller assembly 20, the distance between the axis of the intermediate guide roller 23 closest to the initial guide roller 21 and the axis of the initial guide roller 21 is H1, and the value of H1 is between 0.6m and 0.8m. In some embodiments, there are multiple intermediate guide rollers 23, and along the conveying direction of the guide roller assembly 20, the distance between the axis of the intermediate guide roller 23 closest to the end guide roller 22 and the axis of the end guide roller 22 is H2, and the value of H2 is between 0.6m and 0.8m.

[0073] This reduces the probability of wrinkles occurring when the two support positions of electrode 200 are too close or too far apart.

[0074] In some embodiments, please refer to Figure 2 The wrap angle between the intermediate guide roller 23 and the electrode 200 is α, where α is greater than 0° and less than 90°.

[0075] The wrap angle refers to the central angle corresponding to the contact arc between the electrode 200 and the intermediate guide roller 23.

[0076] If the wrap angle 'a' is too large, it will increase the wrapping area of ​​the electrode 200 on the intermediate guide roller 23, increasing the probability of cracking or wrinkling of the electrode 200. Therefore, in order to reduce the probability of cracking or wrinkling of the electrode 200, 'a' is set to be greater than 0° and less than 90°.

[0077] In some embodiments, please refer to Figure 1 There are multiple heating elements 30, which are spaced apart along the conveying direction of the guide roller assembly 20.

[0078] As an example, a bracket is installed inside the housing 10, and the heating element 30 is mounted on the bracket.

[0079] The heating element 30 can be, but is not limited to, an infrared heater or a resistance heater. Infrared heaters have stronger penetrating power and higher heating temperatures, resulting in better heating of the electrode 200.

[0080] This allows for heating of multiple locations on the electrode 200, reducing the probability of localized overheating or underheating of the electrode 200. This results in more uniform heating of the electrode 200 during the heating process, thereby improving the baking effect of the electrode 200.

[0081] In some embodiments, please refer to Figure 1 The electrode baking apparatus 100 also includes a shield 60, on one side of at least a portion of the heating elements 30. The shield 60 extends along the axial direction of the intermediate guide roller 23 and is used to block the heating elements 30 from transferring some heat to the electrode 200.

[0082] As an example, the shield 60 can be a shield extending along the axis of the intermediate guide roller 23.

[0083] During the heating process, the local temperature of the electrode 200 may become too high. By placing the shielding member 60 at the position where the temperature of the electrode 200 is too high, some heat can be blocked from passing through the electrode 200, thereby shortening the temperature difference between different positions of the electrode 200 and making the electrode 200 heat up more evenly during the heating process. This results in more consistent stress release of the electrode 200 and improves the consistency of the electrode 200 thickness.

[0084] In some embodiments, please refer to Figure 1 The baking apparatus also includes an ambient temperature sensor 40. The ambient temperature sensor 40 is disposed within the housing space and is used to detect the ambient temperature inside the chamber 10.

[0085] One or more ambient temperature sensors 40 can be configured. Figure 1 The example shows three ambient temperature detection sensors 40, which are spaced apart along the height X direction of the enclosure 10 to detect the ambient temperature at different locations inside the enclosure 10.

[0086] Therefore, the ambient temperature sensor 40 can detect the temperature inside the oven 10, so that when the temperature deviates from the preset temperature, the ambient temperature inside the oven 10 can be adjusted in time, thereby improving the baking effect.

[0087] In some embodiments, please refer to Figure 1 The electrode baking apparatus 100 also includes an electrode temperature detection sensor 50. The electrode temperature detection sensor 50 is disposed within the receiving space and is used to detect the temperature of the electrode 200.

[0088] One or more electrode temperature detection sensors 50 can be set. For example, multiple electrode temperature detection sensors 50 can be set at different positions inside the housing 10 along the conveying path of the electrode 200 to detect the heating temperature of the electrode 200 in different baking sections, so as to more accurately control the heating temperature of the electrode 200 and thus achieve a better baking effect.

[0089] Therefore, the temperature inside the chamber 10 can be adjusted according to the detected temperature of the electrode 200 to reduce the probability of the electrode 200 being too hot or too cold, thereby improving the baking effect of the electrode 200.

[0090] For ease of explanation, the following embodiments use a battery production system from some embodiments of this application as an example.

[0091] The battery production system includes the electrode baking device 100 of the above embodiment, which is used to heat the cold-pressed electrode 200.

[0092] During the cold pressing process, electrode 200 is prone to internal stress. After cold pressing, this stress is released, causing electrode 200 to rebound. Therefore, after cold pressing, electrode 200 needs to be left to stand for a period of time before proceeding to the next process. Baking electrode 200 after cold pressing using a baking device can release internal stress in advance, reducing the resting time and improving production efficiency. Simultaneously, it reduces the probability of significant thickness variations in electrode 200 due to insufficient stress release during room temperature resting, thus improving the consistency of electrode thickness.

[0093] In an optional embodiment of the electrode baking apparatus 100, please refer to Figure 1 and Figure 2The electrode baking apparatus 100 is used to bake the cold-pressed electrode 200. The electrode baking apparatus 100 includes a housing 10, a guide roller assembly 20, and a heating element 30. The housing 10 has an internal receiving space, an inlet 11 on one side, and an outlet 12 on the other side. The guide roller assembly 20 is located within the receiving space and includes an initial guide roller 21, an end guide roller 22, and an intermediate guide roller 23. All three rollers are installed within the housing 10 and can rotate relative to it. The axes of the three rollers are parallel to each other along the height direction X of the housing 10, with the intermediate guide roller 23 located on one side of the initial and end guide rollers. The heating element 30 is located within the receiving space and is used to heat the electrode 200. Along the height direction X of the housing 10, the intermediate guide roller 23 is located above the initial guide roller 21 and the end guide roller 22. A heating element 30 is disposed within the receiving space and is used to heat the electrode 200. There are four intermediate guide rollers 23 spaced apart along the conveying direction of the guide roller assembly 20, positioned above the initial guide roller 21 and the end guide roller 22. The distance between the axis of the initial guide roller 21 and the axis of the intermediate guide roller 23 is H1, with a value ranging from 0.6m to 0.8m. The distance between the axis of the intermediate guide roller 23 and the axis of the end guide roller 22 is H2, with a value ranging from 0.6m to 0.8m. The distance between the axes of two adjacent intermediate guide rollers 23 is H3, with a value ranging from 0.6m to 0.8m. The wrap angle between the intermediate guide roller 23 and the electrode 200 is α, where α is greater than 0° and less than 90°. Multiple heating elements 30 are arranged at intervals along the conveying direction of the guide roller assembly 20. At least a portion of the heating elements 30 have a shielding member 60 on one side, extending along the axial direction of the intermediate guide roller 23, which blocks some of the heat transferred from the heating elements 30 to the electrode 200. An ambient temperature sensor 40 is disposed within the housing space to detect the ambient temperature inside the housing 10. An electrode temperature sensor 50 is disposed within the housing space to detect the temperature of the electrode 200.

[0094] Heating and baking the cold-pressed electrode 200 in an oven device can shorten the stress release time generated during cold pressing. The intermediate guide roller 23, located above the initial guide roller 21 and the end guide roller 22, can shorten the distance between them, allowing the chamber 10 to be manufactured shorter and reducing its footprint. Setting the values ​​of H1, H2, and H3 to the range of 0.6m-0.8m can reduce the probability of wrinkles appearing during the electrode 200 baking process, improve the baking effect, and thus improve the quality of the electrode 200.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrode baking apparatus, characterized in that, include: The box has an internal storage space, an inlet on one side and an outlet on the other side. A guide roller assembly is located within the receiving space. The guide roller assembly includes an initial guide roller, an end guide roller, and an intermediate guide roller. The initial guide roller, the end guide roller, and the intermediate guide roller are all installed in the housing and are rotatable relative to the housing. The axes of the initial guide roller, the end guide roller, and the intermediate guide roller are parallel to each other. Along the height direction of the housing, the intermediate guide roller is located on the same side as the initial guide roller and the end guide roller. A heating element is disposed within the receiving space, and the heating element is used to heat the electrode sheet.

2. The electrode baking apparatus according to claim 1, characterized in that, Along the height direction of the housing, the intermediate guide roller is located above the initial guide roller and the end guide roller.

3. The electrode baking apparatus according to claim 2, characterized in that, The number of intermediate guide rollers is multiple, and the multiple intermediate guide rollers are arranged at intervals along the conveying direction of the guide roller assembly.

4. The electrode baking apparatus according to claim 3, characterized in that, The number of intermediate guide rollers is at least three, and at least a portion of the intermediate guide rollers are spaced apart from another portion of the intermediate guide rollers along a first direction, the first direction being perpendicular to the height direction of the housing and the axis of the intermediate guide rollers, respectively.

5. The electrode baking apparatus according to claim 1, characterized in that, The distance between the axis of the initial guide roller and the axis of the intermediate guide roller is H1, and the value of H1 is between 0.6m and 0.8m; and / or, the distance between the axis of the intermediate guide roller and the axis of the end guide roller is H2, and the value of H2 is between 0.6m and 0.8m.

6. The electrode baking apparatus according to claim 5, characterized in that, The number of intermediate guide rollers is multiple. The axes of the plurality of intermediate guide rollers are parallel to each other and spaced apart. Along the conveying direction of the guide roller assembly, the distance between the axes of two adjacent intermediate guide rollers is H3, and the value of H3 ranges from 0.6m to 0.8m. And / or, along the conveying direction of the guide roller assembly, the distance between the axis of the intermediate guide roller closest to the initial guide roller and the axis of the initial guide roller is H1, where H1 ranges from 0.6m to 0.8m. And / or, along the conveying direction of the guide roller assembly, the distance between the axis of the intermediate guide roller closest to the end guide roller and the axis of the end guide roller is H2, and the value of H2 is between 0.6m and 0.8m.

7. The electrode baking apparatus according to any one of claims 1-6, characterized in that, The wrap angle between the intermediate guide roller and the electrode sheet is α, where α is greater than 0° and less than 90°.

8. The electrode baking apparatus according to any one of claims 1-6, characterized in that, The number of heating components is multiple, and the multiple heating components are arranged at intervals along the conveying direction of the guide roller assembly.

9. The electrode baking apparatus according to claim 8, characterized in that, The electrode baking apparatus further includes a shielding member, and at least a portion of the heating components are provided with the shielding member on one side. The shielding member extends along the axial direction of the intermediate guide roller and is used to block the heating components from transferring some heat to the electrode.

10. The electrode baking apparatus according to any one of claims 1-6, characterized in that, The electrode baking apparatus further includes: An ambient temperature sensor is installed within the containment space to detect the ambient temperature inside the enclosure.

11. The electrode baking apparatus according to any one of claims 1-6, characterized in that, The electrode baking apparatus further includes: An electrode temperature sensor is disposed within the receiving space to detect the temperature of the electrode.

12. A battery production system, characterized in that, The invention includes a baking apparatus as described in any one of claims 1-11, the baking apparatus being used to heat the cold-pressed electrode sheet.

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