Heating methods and heating furnaces

Abstract

This application provides a heating method and a heating furnace. The heating method is applicable to a heating furnace including a heating cavity and a first conveying mechanism. The heating cavity heats the object being heated during its movement. The heating method includes: when the object being heated is moved to a target point by the first conveying mechanism, acquiring the temperature of the object being heated and a sub-target temperature of the object at the target point; setting at least one target point between the two ends of the heating cavity along the direction of movement of the object being heated; the at least one target point including a target point whose sub-target temperature is lower than the target heating temperature of the object being heated; and controlling the adjustment of heating furnace parameters based on the temperature of the object being heated at the target point and the sub-target temperature. The heating method and heating furnace provided by this application can improve the heating uniformity of the object being heated and reduce the risk of the object being heated overheating.

Description

Technical Field

[0001] This application relates to the field of heating technology, and more specifically, to a heating method and a heating furnace. Background Technology

[0002] Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0003] During battery production, a high-temperature aging process is performed. This involves heating the individual battery cells to a specific temperature (aging temperature) and holding them at that temperature for a certain period after assembly, electrolyte filling, and the first charge-discharge formation. This aging process improves electrolyte wetting, which is beneficial for stable battery performance. It also facilitates the rejection of substandard batteries with severe self-discharge and the selection of batteries with high consistency.

[0004] During the high-temperature aging process of batteries, the aging temperature is one of the key parameters affecting the aging effect. Therefore, when performing high-temperature aging on batteries, it is necessary to strictly control the process of heating the battery to the aging temperature. Summary of the Invention

[0005] This application provides a heating method and a heating furnace that can improve the heating uniformity of the object being heated and reduce the risk of the object overheating.

[0006] In a first aspect, a heating method is provided, applicable to a heating furnace. The heating furnace includes a heating cavity and a first conveying mechanism disposed within the heating cavity. The heating cavity is used to heat the object during its movement. The heating method includes: when the object is moved by the conveying mechanism to a target point in the heating cavity, acquiring the temperature of the object and a sub-target temperature corresponding to the target point. At least one target point is disposed between the two ends of the heating cavity along the direction of movement of the object, and the at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object; and controlling the adjustment of parameters of the heating furnace based on the temperature of the object and the sub-target temperature corresponding to the target point. The parameters of the heating furnace include at least one of the following: the temperature of the heating cavity and the conveying speed of the first conveying mechanism.

[0007] In this embodiment, during the heating process of the heated object, the temperature of the heated object when it reaches the target point is compared with the corresponding sub-target temperature to determine whether the temperature of the heating cavity and / or the transmission speed of the conveying mechanism in the heating cavity need to be adjusted, so that the heated object can meet the target heating temperature requirement when it moves to the vicinity of the outlet of the heating cavity. This reduces the possibility of the heated object being at a high temperature for an extended period, thereby reducing the risk of overheating and improving the uniformity of heating.

[0008] In one possible implementation, at least one target point includes a target point whose sub-target temperature is less than the target heating temperature; or, at least one target point includes multiple target points, among which the target point closer to the outlet of the heating cavity has a larger sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

[0009] In this embodiment, by comparing the temperature of the heated object at one or more target points with the corresponding sub-target temperature, it can be determined whether the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity need to be adjusted. This is to ensure that the temperature of the heated object when it moves to the next target point meets the sub-target temperature requirement of that next target point, so that the temperature of the heated object at the outlet of the heating cavity meets the target heating temperature requirement. This reduces the possibility of the heated object overheating and allows the heating cavity to exhibit a gradient heating effect, maximizing the temperature uniformity of the heated object.

[0010] In one possible implementation, before the heated object moves along with the first conveying mechanism, the method includes: acquiring target heating parameters, the target heating parameters including a target heating temperature of the heated object, a target heating time for the heated object to reach the target heating temperature, and the dimension of the heating cavity along the direction of movement of the heated object; setting an initial transmission speed of the first conveying mechanism based on the target heating time and the dimension of the heating cavity along the direction of movement of the heated object; and setting an initial temperature of the heating furnace based on the target heating temperature.

[0011] In this embodiment, the initial transmission speed of the first conveying mechanism can be reasonably set according to the target heating time and the size of the heating cavity along the moving direction of the heated object; and the initial temperature of the heating furnace can be reasonably set according to the target heating temperature, which is beneficial to heating the heated object to the target heating temperature.

[0012] In one possible implementation, the initial transmission speed of the first conveying mechanism is set according to the target heating time and the size of the heating cavity along the direction of movement of the heated object, including: setting the initial transmission speed V to satisfy: V>L / t1, where t≤t1, L is the size of the heating cavity along the direction of movement of the heated object, t is the target heating time, and t1 is the preset time.

[0013] In this embodiment of the application, the initial transmission speed of the first conveying mechanism can be set to be greater than L / t1, which can provide a certain margin for the subsequent reduction of the speed of the first conveying mechanism. Thus, even when the transmission speed of the first conveying mechanism is reduced during the heating process, the movement and heating time of the heated object in the heating furnace can still meet the requirements of the target heating time.

[0014] In one possible implementation, the initial transmission speed of the first conveying mechanism is set according to the target heating time and the dimension of the heating cavity along the direction of movement of the heated object. This includes setting the initial rotational speed N of the roller of the first conveying mechanism to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where t≤t1, R is the radius of the roller of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

[0015] In this embodiment, by setting the rotational speed of the rollers within a reasonable range, on the one hand, a certain margin can be provided for reducing the speed of the subsequent first conveying mechanism, so that even if the transmission speed of the first conveying mechanism is reduced, the heating time of the heated object in the heating furnace can still meet the target heating time requirement. On the other hand, it can also reduce the situation where the heating object's heating time is too fast due to excessive roller rotation speed, resulting in the temperature of the heated object being far from reaching the corresponding sub-target temperature when it moves to the target point.

[0016] In one possible implementation, the heating chamber includes a first chamber and a second chamber, with the second chamber located downstream of the first chamber. Setting the initial temperature of the heating furnace according to the target heating temperature includes: setting the initial temperature T of the first chamber. 初始1 Satisfy: (T+5)℃≤T 初始1 ≤(T+15)℃; and, set the initial temperature T of the second cavity. 初始2 Satisfy: T≤T 初始2 ≤(T+8)℃, where T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

[0017] In this embodiment, by setting the initial temperature of the first cavity within a reasonable range, the object to be heated can be heated in the first cavity to a temperature close to the target heating temperature and not exceeding the target heating temperature. By setting the initial temperature of the second cavity within a reasonable range, the heating rate of the object to be heated can be relatively slower when it continues to move to the second cavity, which facilitates the temperature control of the object to be heated and reduces the risk of overheating when the object to be heated continues to be heated to the target heating temperature.

[0018] In one possible implementation, the sub-target temperatures corresponding to multiple target points are 0.5T to T, and the multiple target points are set at 1 / 3L1 to (L1+3 / 4L2) of the distance from the inlet of the heating cavity, where L1 is the dimension of the first cavity along the moving direction of the heated object, and L2 is the dimension of the second cavity along the moving direction of the heated object.

[0019] In this embodiment of the application, by setting a target point at a reasonable position in the heating cavity and setting the sub-target temperature corresponding to the target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the conveying mechanism in the heating cavity can be adjusted when the temperature of the heated object rises to a relatively high temperature, thereby reducing the number of adjustments.

[0020] In one possible implementation, the temperature of the first sub-target corresponding to the first target point of the heated object is 0.85T to 0.95T. The first target point is set at 1 / 2L1 to 5 / 6L1 away from the inlet of the heating cavity, and the first target point is included among multiple target points.

[0021] In this embodiment of the application, by setting the first sub-target temperature corresponding to the first target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the conveying mechanism in the heating cavity can be reasonably adjusted according to the temperature of the heated object at the first target point and the first sub-target temperature, so that the temperature of the heated object when it moves to the next target point can meet or approach the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature.

[0022] In one possible implementation, the second sub-target temperature corresponding to the second target point of the heated object is 0.90T to 0.98T. The second target point is set at L1 distance from the inlet of the heating cavity. Multiple target points include the second target point, which is located downstream of the first target point.

[0023] In this embodiment of the application, by setting the second sub-target temperature corresponding to the second target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the conveying mechanism in the heating cavity can be reasonably adjusted according to the temperature of the heated object at the second target point and the second sub-target temperature, so that the temperature of the heated object when it moves to the next target point can approach or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature.

[0024] In one possible implementation, the third sub-target temperature of the heated object at the third target point is 0.95T to T. The third target point is set at (L1+1 / 3L2) to (L1+2 / 3L2) distance from the inlet of the heating cavity. Multiple target points include the third target point, which is located downstream of the second target point.

[0025] In this embodiment of the application, by setting the third sub-target temperature corresponding to the third target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the conveying mechanism in the heating cavity can be reasonably adjusted according to the temperature of the heated object at the third target point and the third sub-target temperature, so that the temperature of the heated object can meet the requirements of the target heating temperature when it moves to the outlet of the heating cavity.

[0026] In one possible implementation, the parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the object being heated at the target point. This includes: adjusting the transmission speed of the first conveying mechanism when the first temperature of the object being heated at the first target point is not equal to the first sub-target temperature and the difference is within a preset range; or adjusting the temperature of the first cavity when the first temperature is not equal to the first sub-target temperature and the difference is outside the preset range; or not adjusting the transmission speed of the first conveying mechanism and the temperature of the first cavity when the first temperature is equal to the first sub-target temperature.

[0027] In this embodiment of the application, when the first temperature and the first sub-target temperature are not equal and the difference is small, the heating time when the heated object moves from the first target point to the next target point can be adjusted by adjusting the transmission speed of the first conveying mechanism. This allows the temperature rise of the heated object to be within the aforementioned small adjustable range, making it easier for the heated object to approach or meet the temperature requirements of the next target point when it moves to the next target point.

[0028] On the other hand, when the first temperature and the first sub-target temperature are not equal and the difference is large, by adjusting the temperature of the first cavity, the temperature of the heated object when it moves to the next target point can be close to or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature as much as possible.

[0029] In one possible implementation, if the difference between the first temperature and the first sub-target temperature when the heated object moves to the first target point is within a preset range, adjusting the transmission speed of the conveying mechanism includes: at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the temperature is ≤T1, increase the transmission speed of the first conveying mechanism; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 If the value is less than 0, reduce the transmission speed of the first transmission mechanism.

[0030] In this embodiment, when the difference between the first temperature and the first sub-target temperature is small and the first temperature is greater than the first sub-target temperature, the heating time of the heated object moving to the next target point can be reduced by increasing the transmission speed of the first conveying mechanism, thereby making the temperature rise of the heated object when moving from the first target point to the next target point relatively smaller; or, when the difference between the first temperature and the first sub-target temperature is small and the first temperature is less than the first sub-target temperature, the transmission speed of the first conveying mechanism can be reduced to increase the heating time of the heated object moving to the next target or to the outlet of the heating cavity, thereby making the temperature rise of the heated object when moving from the first target point to the next target point relatively larger, so that the temperature of the heated object when moving to the next target point is as close as possible to or meets the requirements of the sub-target temperature corresponding to the next target point, and thus making the temperature of the heated object when moving to the outlet of the heating cavity meet the requirements of the target heating temperature as much as possible.

[0031] In one possible implementation, adjusting the temperature of the first cavity when the difference between the first temperature and the first sub-target temperature is outside a preset range includes: adjusting the temperature of the first cavity at the first temperature T... 11 With the temperature of the first sub-target T 21 The difference satisfies: T 11 -T 21 If the temperature is greater than T1, lower the temperature of the first cavity; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T11 -T 21 In this case, the temperature of the first cavity is increased.

[0032] In this embodiment, when the first temperature differs significantly from the first sub-target temperature, and the first temperature is greater than the first sub-target temperature, the temperature rise of the object to be heated during subsequent heating processes will be relatively small. Thus, by lowering the temperature of the first cavity, the heated object can experience a smaller temperature rise during movement, ensuring that the temperature of the heated object when it reaches the next target point is close to or meets the requirements of the sub-target temperature corresponding to that next target point. This further ensures that the temperature of the heated object when it reaches the outlet of the heating cavity meets the target heating temperature requirement as closely as possible.

[0033] On the other hand, when the first temperature differs significantly from the first sub-target temperature, and the first temperature is lower than the first sub-target temperature, the temperature rise of the object to be heated during subsequent heating processes will be relatively large. Therefore, by increasing the temperature of the second cavity, the object to be heated can experience a significant temperature rise during its movement, ensuring that the temperature of the object when it reaches the next target point is close to or meets the requirements of the sub-target temperature corresponding to that next target point. This, in turn, ensures that the temperature of the object when it reaches the outlet of the heating cavity meets the target heating temperature requirements as closely as possible.

[0034] In one possible implementation, the parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the object being heated at the target point. This includes: increasing the transmission speed of the first conveying mechanism when the second temperature of the object being heated at the second target point is greater than the second sub-target temperature corresponding to the object being heated at the second target point; or decreasing the transmission speed of the first conveying mechanism when the second temperature is less than the second sub-target temperature; or not adjusting the transmission speed of the first conveying mechanism and the temperature of the second cavity when the second temperature is equal to the second sub-target temperature.

[0035] In this embodiment, when the heated object moves to the second target point, if the temperature of the heated object does not meet the sub-target temperature requirement corresponding to the second target point, the heating time of the heated object can be adjusted by adjusting the transmission speed of the first conveying mechanism. By controlling the heating time of the heated object, it is easier to control the magnitude of the temperature rise of the heated object, preventing large temperature jumps, so that the temperature of the heated object when moving to the next target point is close to or meets the sub-target temperature requirement corresponding to the next target point, and thus ensuring that the temperature of the heated object meets the target heating temperature requirement when it moves to the outlet of the heating cavity. Therefore, if the temperature of the heated object is higher than the second sub-target temperature, the heating time of the heated object can be reduced by increasing the transmission speed of the conveying mechanism in the second cavity; or, if the temperature of the heated object is lower than the second sub-target temperature, the heating time of the heated object can be increased by decreasing the transmission speed of the conveying mechanism in the second cavity.

[0036] In one possible implementation, the parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the object being heated at the target point. This includes: reducing the temperature of the second cavity when the third temperature of the object being heated at the third target point is greater than the third sub-target temperature corresponding to the object being heated at the third target point; or reducing the transmission speed of the first conveying mechanism when the third temperature is less than the third sub-target temperature; or not adjusting the transmission speed of the first conveying mechanism and the temperature of the second cavity when the third temperature is equal to the third sub-target temperature.

[0037] In this embodiment, if the third temperature when the heated object moves to the third target point is greater than the third sub-target temperature corresponding to the heated object at the third target point, the temperature of the second cavity can be reduced to adjust the temperature of the heated object. For example, the temperature rise of the heated object can be reduced, thus reducing the risk that the temperature of the heated object exceeds the target heating temperature. Alternatively, if the third temperature is less than the third sub-target temperature, the heating time of the heated object can be increased by reducing the transmission speed of the first conveying mechanism, thereby reducing the risk that the temperature of the heated object will exceed the target heating temperature during subsequent moving heating processes, thus meeting the requirements of the target heating temperature.

[0038] In one possible implementation, the heating furnace further includes an insulation cavity located downstream of the heating cavity. The initial temperature of the heating furnace is set according to the target heating temperature, including setting the initial temperature of the insulation cavity to T.

[0039] In this embodiment of the application, the temperature of the heat preservation cavity is set to T, which facilitates the heat preservation of the heated object when it is heated to the target heating temperature and moved into the heat preservation cavity.

[0040] In one possible implementation, the method further includes: when the heated object moves to the end point of the heating cavity and the temperature of the heated object meets the target heating temperature, controlling the heated object to move to the heat preservation cavity for heat preservation.

[0041] In this embodiment of the application, by setting up a heat-insulating cavity, the object to be heated can be kept warm in the heat-insulating cavity, thereby realizing continuous operation of heating and heat preservation of the object to be heated.

[0042] In one possible implementation, before controlling the heated object to move to the insulation cavity for insulation, the heating method further includes: determining the target position of the heated object in the heating cavity when the heated object reaches the target heating temperature and the target transmission speed of the conveying mechanism when the heated object is conveyed after the target position; obtaining the dimensions of the insulation cavity along the moving direction of the heated object and the target insulation time of the heated object; and setting the transmission speed of the second conveying mechanism according to the target position, target speed, dimensions of the insulation cavity along the moving direction of the heated object, and target insulation time, wherein the second conveying mechanism is disposed in the insulation cavity and is located downstream of the first conveying mechanism.

[0043] In this embodiment of the application, the transmission speed of the second conveying mechanism in the heat preservation cavity can be accurately set by the target position, target transmission speed, size of the heat preservation cavity along the moving direction of the heated object, and target heat preservation time, so as to reasonably preserve the heated object.

[0044] In one possible implementation, the object being heated includes a single battery cell.

[0045] Secondly, a heating furnace is provided, comprising: a heating cavity for heating the object during its movement, wherein at least one target point is provided between the two ends of the heating cavity along the direction of movement of the object, the at least one target point including a target point whose sub-target temperature is lower than the target heating temperature of the object; a first conveying mechanism disposed in the heating cavity for moving the object within the heating cavity; a heating object temperature monitoring module for monitoring the temperature of the object; and a control module for controlling the adjustment of parameters of the heating furnace based on the temperature of the object at the target point monitored by the first heating module and the sub-target temperature corresponding to the target point, wherein the parameters of the heating furnace include at least one of the following: the temperature of the heating cavity and the conveying speed of the first conveying mechanism.

[0046] In one possible implementation, at least one target point includes a target point whose sub-target temperature is less than the target heating temperature; or, at least one target point includes multiple target points, where the target point closer to the outlet of the heating cavity has a larger sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

[0047] In one possible implementation, the heating furnace also includes a loading mechanism for carrying the object to be heated.

[0048] In one possible implementation, the temperature monitoring module for the heated object is mounted on the loading mechanism.

[0049] In one possible implementation, one end of the heating object temperature monitoring module is connected to the heating object to monitor its temperature.

[0050] In one possible implementation, the other end of the heating object temperature monitoring module is connected to the control module so that the control module can acquire the temperature of the heating object monitored by the heating object temperature monitoring module.

[0051] In one possible implementation, the control module is configured to acquire target heating parameters, including a target heating temperature of the object being heated, a target heating time for the object to reach the target heating temperature, and the dimension of the heating cavity along the moving direction of the object being heated; to set an initial transmission speed of the first conveying mechanism based on the target heating time and the dimension of the heating cavity along the moving direction of the object being heated; and to set an initial temperature of the heating furnace based on the target heating temperature.

[0052] In one possible implementation, the control module is used to set the initial transmission speed V to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity along the direction of movement of the heated object, t is the target heating time, and t1 is the preset time.

[0053] In one possible implementation, the control module is used to set the initial rotational speed N of the roller of the first conveying mechanism to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, R is the radius of the roller of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

[0054] In one possible implementation, the heating cavity includes a first cavity and a second cavity, with the second cavity located downstream of the first cavity. A control module is used to set the initial temperature T of the first cavity. 初始1 Satisfy: (T+5)℃≤T 初始1 ≤(T+15)℃; and, set the initial temperature T of the second cavity. 初始2 Satisfy: T≤T 初始2 ≤(T+8)℃, where T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

[0055] In one possible implementation, the sub-target temperatures corresponding to multiple target points are 0.5T to T, and at least one target point is set at a distance of 1 / 3L1 to (L1+3 / 4L2) from the inlet of the heating cavity, where L1 is the dimension of the first cavity along the moving direction of the heated object, and L2 is the dimension of the second cavity along the moving direction of the heated object.

[0056] In one possible implementation, the multiple target points include a first target point, and the first sub-target temperature corresponding to the first target point of the heated object is 0.85T to 0.95T. The first target point is set at 1 / 2L1 to 5 / 6L1 away from the inlet of the heating cavity.

[0057] In one possible implementation, the multiple target points include a second target point located downstream of the first target point. The second sub-target temperature of the heated object corresponding to the second target point is 0.90T to 0.98T. The second target point is located at L1 distance from the inlet of the heating cavity.

[0058] In one possible implementation, the multiple target points include a third target point located downstream of the second target point. The third sub-target temperature of the heated object at the third target point is 0.95T to T. The third target point is located at a distance of (L1+1 / 3L2) to (L1+2 / 3L2) from the inlet of the heating cavity.

[0059] In one possible implementation, the control module is configured to adjust the transmission speed of the first conveying mechanism when the first temperature of the heated object at the first target point is not equal to the first sub-target temperature and the difference is within a preset range; or, when the first temperature is not equal to the first sub-target temperature and the difference is outside the preset range, adjust the temperature of the first cavity; or, when the first temperature is equal to the first sub-target temperature, not adjust the transmission speed of the first conveying mechanism and the temperature of the first cavity.

[0060] In one possible implementation, a control module is configured to operate at a first temperature T. 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the temperature is ≤T1, increase the transmission speed of the first conveying mechanism; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 If the value is less than 0, reduce the transmission speed of the first transmission mechanism.

[0061] In one possible implementation, a control module is configured to operate at a first temperature T. 11 With the temperature of the first sub-target T21 The difference satisfies: T 11 -T 21 If the temperature is greater than T1, lower the temperature of the first cavity; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the first cavity is increased.

[0062] In one possible implementation, the control module is configured to increase the transmission speed of the first conveying mechanism when the second temperature of the heated object when it moves to the second target point is greater than the second sub-target temperature of the heated object at the second target point; or, decrease the transmission speed of the first conveying mechanism when the second temperature is less than the second sub-target temperature; or, not adjust the transmission speed of the first conveying mechanism and the temperature of the second cavity when the second temperature is equal to the second sub-target temperature.

[0063] In one possible implementation, the control module is configured to reduce the temperature of the second cavity when the third temperature of the heated object when it moves to the third target point is greater than the third sub-target temperature of the heated object at the third target point; or, reduce the transmission speed of the first conveying mechanism when the third temperature is less than the third sub-target temperature; or, not adjust the transmission speed of the first conveying mechanism and the temperature of the second cavity when the third temperature is equal to the third sub-target temperature.

[0064] In one possible implementation, the heating furnace further includes a heat-insulating cavity disposed downstream of the heating cavity, and a control module for setting the initial temperature of the heat-insulating cavity to T.

[0065] In one possible implementation, the control module is used to control the heated object to move to the heat preservation cavity for heat preservation when the heated object moves to the end point of the heating cavity and the temperature of the heated object meets the target heating temperature.

[0066] In one possible implementation, the heating furnace further includes a second conveying mechanism disposed in the heat-insulating cavity and located downstream of the first conveying mechanism; a control module for determining the target position of the heated object in the heating cavity when the heated object reaches the target heating temperature and the target transmission speed of the heated object when the first conveying mechanism transmits the heated object after the target position; an acquisition unit for acquiring the dimensions of the heat-insulating cavity along the moving direction of the heated object and the target heat-insulating time of the heated object; and a control module for setting the transmission speed of the second conveying mechanism based on the target position, target speed, dimensions of the heat-insulating cavity along the moving direction of the heated object, and target heat-insulating time.

[0067] In one possible implementation, the object being heated includes a single battery cell. Attached Figure Description

[0068] Figure 1 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0069] Figure 2 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0070] Figure 3 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0071] Figure 4 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0072] Figure 5 This is a schematic diagram of the structure of the heating furnace provided in the embodiment of this application.

[0073] Figure 6 This is a schematic cross-sectional view of the heating furnace along line A-A' provided in an embodiment of this application.

[0074] Figure 7 This is a schematic cross-sectional view of the heating furnace along line A-A' provided in an embodiment of this application.

[0075] Figure Labels

[0076] Heating furnace: 500, heating chamber: 510, first chamber: 511, second chamber: 512, inlet of heating chamber: 513, outlet of heating chamber: 514, first conveying mechanism: 520, temperature monitoring module for heated object: 530, control module: 540, target point: 550, first target point: 551, second target point: 552, third target point: 553, loading mechanism: 560, heat preservation chamber: 570, inlet of heat preservation chamber: 571, outlet of heat preservation chamber: 572, second conveying mechanism: 580. Detailed Implementation

[0077] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0078] 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, "a plurality of" means two or more, unless otherwise explicitly defined. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application, are intended to cover non-exclusive inclusion.

[0079] 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 alone, A and B simultaneously, or B alone. Additionally, the character " / " in this text generally indicates that the preceding and following related objects have an "or" relationship.

[0080] 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.

[0081] In this application, the terms "upper," "lower," "left," "right," "inner," and "outer," indicating orientation or positional relationships, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0082] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0083] Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0084] During battery production, high-temperature aging treatment may be performed. This involves heating the battery cells to a certain temperature (aging temperature) and holding them at that temperature for a specific period after assembly, electrolyte filling, and the first charge-discharge formation. Aging treatment improves electrolyte wetting, contributing to stable battery performance. It also accelerates the resolution of side effects such as gas generation, electrolyte decomposition, and metal impurity precipitation in the active materials of the positive and negative electrodes, allowing the electrochemical performance of the lithium battery to stabilize quickly. Furthermore, it facilitates the rejection of substandard batteries with severe self-discharge and the selection of batteries with high consistency.

[0085] During the high-temperature aging process of batteries, the aging temperature is a key parameter that affects the effectiveness of the aging treatment. Therefore, when performing high-temperature aging treatment on batteries, it is necessary to strictly control the process of heating the battery to the aging temperature.

[0086] Based on the above problems, this application provides a heating method and a heating furnace. The heating method is applicable to the heating furnace, which includes a heating cavity and a first conveying mechanism disposed in the heating cavity. The heating cavity is used to heat the object during its movement. The heating method includes: when the object is moved to a target point in the heating cavity by the first conveying mechanism, acquiring the temperature of the object and a sub-target temperature corresponding to the target point. At least one target point is disposed between the two ends of the heating cavity along the moving direction of the object, and the at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object; and controlling the adjustment of the parameters of the heating furnace according to the temperature of the object and the sub-target temperature corresponding to the target point. The parameters of the heating furnace include at least one of the following: the temperature of the heating cavity and the transmission speed of the first conveying mechanism.

[0087] The heating method and heating furnace provided in this application can improve the heating uniformity of the object being heated, and at the same time reduce the risk of the object being heated to overheat.

[0088] The following combination Figures 1 to 4 The heating method provided in the embodiments of this application will be described.

[0089] Figure 1 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0090] Figure 1 The heating method shown is applicable to a heating furnace. The heating furnace may include a heating chamber and a first conveying mechanism disposed within the heating chamber, the heating chamber being used to heat the object during its movement.

[0091] 110. When the object to be heated is moved to the target point by the first conveying mechanism, the temperature of the object to be heated and the sub-target temperature corresponding to the object to be heated at the target point are obtained.

[0092] At least one target point is provided between the two ends of the heating cavity along the moving direction of the object being heated, and the at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object being heated.

[0093] The object to be heated can move from the inlet of the heating chamber to the outlet of the heating chamber via the first conveyor mechanism. During the movement of the object, it is heated by the heating furnace to reach the target heating temperature.

[0094] The first conveying mechanism can take different forms. For example, the first conveying mechanism may include a conveyor belt, which can be used to move the object to be heated. Alternatively, the first conveying mechanism may include a roller mechanism, which uses the rotation of the rollers to move the object to be heated from the inlet to the outlet of the heating chamber.

[0095] The target heating temperature is the temperature at which the object to be heated needs to be heated. For example, the temperature at which a battery cell undergoes aging treatment.

[0096] During the movement of the object being heated, its temperature gradually increases until it reaches the target heating temperature. If the object can reach a specific temperature (sub-target temperature) at certain designated locations (target points) during the heating process, the target heating temperature requirement will be met when the object moves to the vicinity of the outlet of the heating chamber.

[0097] Therefore, in this embodiment, at least one target point can be set between the inlet and outlet of the heating chamber of the heating furnace, and each target point has a corresponding sub-target temperature. Based on the temperature of the heated object at each target point and the corresponding sub-target temperature, it is determined whether to adjust the temperature of the heating chamber and / or the transmission speed of the first conveying mechanism in the heating chamber, so that the heated object can meet the target heating temperature requirement when it moves to the vicinity of the outlet of the heating chamber.

[0098] For example, a target point can be set between the two ends of the heating cavity along the direction of movement of the object being heated, and the sub-target temperature corresponding to the target point is lower than the target heating temperature.

[0099] For example, three target points can be set between the two ends of the heating cavity along the direction of movement of the object being heated, and among these three target points, there is a target point whose sub-target temperature is lower than the target heating temperature.

[0100] As an example, the temperature of the object being heated can be the temperature of the object's surface.

[0101] 120. The parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the target point.

[0102] The parameters of the heating furnace include at least one of the following: the temperature of the heating chamber and the transmission speed of the first conveying mechanism.

[0103] As an example, if the temperature of the heated object meets the requirements of the sub-target temperature when the heated object moves to the target point, the temperature of the heating cavity and the transmission speed of the conveying mechanism in the heating cavity do not need to be adjusted.

[0104] As an example, if the temperature of the object being heated does not meet the sub-target temperature requirement when the object is moved to the target point, parameters of the heating furnace, such as the temperature of the heating chamber and / or the transmission speed of the first conveying mechanism in the heating chamber, can be controlled and adjusted. For example, if the temperature of the object being heated is lower than the sub-target temperature, the temperature of the heating chamber can be increased and / or the rotation speed of the first conveying mechanism can be decreased. For example, if the temperature of the object being heated is higher than the sub-target temperature (which is lower than the target heating temperature), the temperature of the heating chamber can be decreased and / or the rotation speed of the first conveying mechanism can be increased.

[0105] In this embodiment, during the heating process of the object being heated, the temperature of the object when it reaches the target point is compared with the corresponding sub-target temperature to determine whether to adjust the parameters of the heating furnace, such as the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity, so that the object being heated can meet the target heating temperature requirement when it moves to the vicinity of the outlet of the heating cavity. This reduces the possibility of the object being heated at a high temperature for an extended period, thereby reducing the risk of overheating and improving the uniformity of heating.

[0106] In some embodiments, at least one target point includes a target point whose sub-target temperature is less than the target heating temperature.

[0107] Alternatively, at least one target point may include multiple target points, among which the target point closer to the outlet of the heating cavity corresponds to a higher sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

[0108] For example, a target point can be set between the two ends of the heating cavity along the direction of movement of the object being heated, and the sub-target temperature corresponding to the target point is lower than the target heating temperature.

[0109] For example, three target points can be set between the two ends of the heating cavity along the moving direction of the heated object: target point 1, target point 2 and target point 3. Target point 2 is located downstream of target point 1, target point 3 is located downstream of target point 2, and the sub-target temperature corresponding to target point 1 is less than the sub-target temperature corresponding to target point 2, which is less than the sub-target temperature corresponding to target point 3 and is less than or equal to the target heating temperature.

[0110] In other words, in this embodiment of the application, one or more target points can be set between the two ends of the heating cavity along the moving direction of the heated object. If one target point is set, the temperature of the target point is less than the target heating temperature. If multiple target points are set, the multiple target points include target points whose sub-target temperatures are less than the target heating temperature, and the sub-target temperatures of the upstream target point are less than the sub-target temperatures of the downstream target point.

[0111] One or more target points are set in the heating chamber along the moving direction of the battery cell, and the one or more target points include target points whose sub-target temperatures are lower than the target heating temperature. Ideally, the temperature of the heated object at each target point is equal to the corresponding sub-target temperature, until the target heating temperature is reached.

[0112] Therefore, in this embodiment, by comparing the temperature of the heated object at one or more target points with the corresponding sub-target temperature, it can be determined whether the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity need to be adjusted. This is to ensure that the temperature of the heated object when it moves to the next target point is as close as possible to or meets the sub-target temperature requirement of the next target point, and thus ensures that the temperature of the heated object at the outlet of the heating cavity meets the target heating temperature requirement. In this way, the possibility of the heated object overheating can be reduced, and the heating cavity can exhibit a gradient heating, thereby maximizing the temperature uniformity of the heated object.

[0113] Figure 2 This is a schematic flowchart of the heating method provided in an embodiment of this application. Figure 2 The method shown is applicable to a heating furnace, which includes a heating chamber and a first conveying mechanism disposed in the heating chamber. The heating chamber is used to heat the object during its movement.

[0114] 210, Obtain the target heating parameters.

[0115] The target heating parameters include the target heating temperature of the object being heated, the target heating time for the object to reach the target heating temperature, and the dimensions of the heating cavity along the direction of movement of the object being heated.

[0116] During the movement of the object being heated within the heating chamber, it is required to reach the target heating temperature within the target heating time. The target heating temperature and target heating time can be determined based on production requirements, etc. For example, the aging temperature and the time required to reach the aging temperature during battery cell aging treatment.

[0117] The dimension of the heating cavity along the direction of movement of the object being heated can refer to the dimension of the heating cavity along its length.

[0118] In the embodiments of this application, the target heating time can be a specific value or a range of values. Similarly, the target heating temperature can be a specific value or a range of values.

[0119] 220. Set the initial parameters of the heating furnace according to the target heating parameters.

[0120] In some embodiments, the initial parameters of the heating furnace may include the initial conveying speed of the first conveying mechanism and / or the initial temperature of the heating furnace.

[0121] In some embodiments, the initial transmission speed of the first conveying mechanism can be set according to the target heating time and the size of the heating cavity along the direction of movement of the heated object.

[0122] Generally speaking, during the heating process of an object, the shorter the target heating time, the better. For example, in the aging process of battery cells, a shorter target heating time is better, as it can improve production efficiency. The target heating time t can be required to be less than or equal to a preset time t1, i.e., t ≤ t1.

[0123] The shorter the target heating time, the greater the required transmission speed of the transmission mechanism.

[0124] In this embodiment, the initial transmission speed of the first conveying mechanism can be reasonably set according to the target heating time and the size of the heating cavity along the moving direction of the heated object.

[0125] Considering that when the object to be heated reaches the target point, the conveying speed of the first conveyor mechanism may need to be adjusted, for example, by reducing the conveying speed of the first conveyor mechanism, which may increase the heating time of the object and fail to meet the target heating time requirement. Therefore, in order to ensure that the heating time of the object is less than or equal to the preset time t1, that is, to meet the target heating time requirement, the initial conveying speed of the first conveyor mechanism can be set slightly higher.

[0126] Therefore, in some embodiments, the initial transmission speed V of the first transmission mechanism is set to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, t is the target heating time, and t1 is the preset time.

[0127] V can also be understood as the speed at which the object being heated moves within the furnace.

[0128] t1 represents the upper limit or maximum value of the target heating time. Based on t1, the lower limit of the moving speed of the heated object can be obtained. That is, in one case, the heated object can meet the target heating time requirement by moving and heating in the furnace at this lower limit moving speed.

[0129] In this embodiment, the initial transmission speed of the first conveying mechanism can be set to be greater than the lower limit of the moving speed, providing a certain margin for the subsequent reduction of the speed of the first conveying mechanism. Thus, even if the transmission speed of the first conveying mechanism in the heating cavity is reduced, the moving heating time of the heated object in the heating furnace can still meet the requirements of the target heating time.

[0130] In some embodiments, the first conveying mechanism is a roller conveying mechanism. The initial rotational speed N of the rollers of the first conveying mechanism in the heating cavity can be set to satisfy: N > L / 2πRt1.

[0131] In this embodiment, V = 2πRN. If V > L / t1, then N > L / 2πRt1 can be calculated.

[0132] In some embodiments, the first conveying mechanism is a roller conveying mechanism. The initial rotational speed N of the rollers of the conveying mechanism in the heating cavity can be set to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where L is the dimension of the heating cavity along the moving direction of the heated object, R is the radius of the rollers of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

[0133] In this embodiment, by setting the rotational speed of the rollers in the heating chamber within a reasonable range, on the one hand, a certain margin can be provided for reducing the speed of the subsequent first conveying mechanism. This ensures that even with a reduced transmission speed of the first conveying mechanism in the heating chamber, the heating time of the object moving within the furnace still meets the target heating time requirement. On the other hand, it also reduces the risk of the object heating too quickly due to excessive roller rotation speed, which could result in the object's temperature falling far short of the corresponding sub-target temperature when it reaches the target point.

[0134] In some embodiments, the initial temperature of the heating furnace can be set according to the target heating temperature.

[0135] In this embodiment of the application, the initial temperature of the heating furnace can be reasonably set according to the target heating temperature, which is beneficial for the heated object to reach the target heating temperature.

[0136] In some embodiments, the initial temperature of the heating furnace may include the initial temperature of the heating cavity, and the initial temperature of the heating cavity may be set to be greater than the target heating temperature.

[0137] In this embodiment of the application, by setting the initial temperature of the heating cavity to be greater than the target heating temperature, the object being heated can be heated quickly and effectively during movement, thereby meeting the requirements of the target heating temperature.

[0138] In some embodiments, the heating cavity includes a first cavity and a second cavity, the second cavity being located downstream of the first cavity, and an initial temperature T is set for the first cavity. 初始1 Satisfy: (T+5℃)≤T 初始1 ≤(T+15℃); and, set the initial temperature T of the second cavity. 初始2 Satisfy: T≤T 初始2 ≤(T+8℃), where T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

[0139] The temperatures of the first and second chambers can be controlled independently.

[0140] The initial temperature of the first cavity and the initial temperature of the second cavity are generally greater than the target heating temperature of the object being heated.

[0141] For example, the target heating temperature can be 75°C, the initial temperature of the first cavity can be set to 85°C, and the initial temperature of the second cavity can be set to 80°C.

[0142] After the object to be heated is heated in the first cavity, its temperature can be raised to a relatively high level, but not exceeding the target heating temperature. To reduce the risk of the object, which has a high temperature, overheating in the second cavity, the initial temperature of the second cavity can be set to be lower than that of the first cavity. On the other hand, it should also be considered that although the object in the second cavity has a higher temperature, it generally still needs to continue to heat up; therefore, the initial temperature of the second cavity should not be set too low.

[0143] In this embodiment, by setting the initial temperature of the first cavity within a reasonable range, the object to be heated can be heated in the first cavity to a temperature close to the target heating temperature and not exceeding the target heating temperature. By setting the initial temperature of the second cavity within a reasonable range, the heating rate of the object to be heated can be relatively slower when it continues to move to the second cavity, which facilitates the temperature control of the object to be heated and reduces the risk of overheating when the object to be heated continues to be heated to the target heating temperature.

[0144] In some embodiments, the initial temperature of the first cavity can be set according to the initial transmission speed of the first conveying mechanism and the target heating temperature. For example, the higher the initial transmission speed of the first conveying mechanism, the higher the initial temperature of the heating cavity can be set. For example, the initial transmission speed of the first conveying mechanism is speed 1, and the initial temperature of the heating cavity is temperature 1; the initial transmission speed of the first conveying mechanism is speed 2, and the initial temperature of the heating cavity is temperature 2, wherein both temperature 1 and temperature 2 are greater than the target heating temperature. Here, if speed 1 is greater than speed 2, then temperature 1 is greater than temperature 2.

[0145] In this embodiment, the higher the initial transmission speed of the first transmission mechanism, the higher the initial temperature of the first cavity and the second cavity will be, and both will be higher than the target heating temperature.

[0146] 230. When the object to be heated moves to the target point along with the first conveyor mechanism, the temperature of the object to be heated and the sub-target temperature of the object to be heated at the target point are obtained.

[0147] At least one target point is provided between the two ends of the heating chamber of the heating furnace, and the at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object being heated.

[0148] As described above, during the movement of the heated object within the heating chamber, it is desirable for the object's temperature to exhibit a gradient increase. For example, it is desired that the temperature of the heated object rises to a corresponding specified temperature at one or more designated locations within the heating chamber. This designated location is the target point, and the specified temperature is the sub-target temperature.

[0149] For example, the target point can be set at 1 / 2L from the inlet of the heating chamber, and the sub-target temperature can be set to about 0.9T, where L is the dimension of the heating chamber along the direction of movement of the object being heated, and T is the target heating temperature.

[0150] In some embodiments, a plurality of target points are provided in the heating cavity, and the sub-target temperatures corresponding to the plurality of target points are 0.5T to T. At least one target point is provided at a distance of 1 / 3L1 to (L1+3 / 4L2) from the inlet of the heating cavity, where L1 is the dimension of the first cavity along the moving direction of the heated object, and L2 is the dimension of the second cavity along the moving direction of the heated object.

[0151] The heating chamber may include a first chamber located upstream and a second chamber located downstream.

[0152] For example, the heating chamber includes two target points, such as target point 1 and target point 2. Target point 1 is located at 3 / 4L1 from the inlet of the heating chamber, and target point 2 is located at L1+3 / 4L2 from the inlet of the heating chamber. The sub-target temperature corresponding to target point 1 can be determined to be 0.93T, and the sub-target temperature corresponding to target point 2 can be determined to be 0.98T, where T is the target heating temperature.

[0153] In this embodiment of the application, by setting a target point at a reasonable position in the heating cavity and setting the sub-target temperature corresponding to the target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity can be adjusted when the temperature of the heated object rises to a relatively high temperature, thereby reducing the number of adjustments to the heating furnace.

[0154] 240. The parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the target point.

[0155] Some details of step 230 and step 240 can be found in the descriptions of steps 110 and 120, and will not be repeated here.

[0156] The following combination Figure 3 An exemplary heating method is provided for heating chambers containing multiple target points.

[0157] Figure 3 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0158] 310, Obtain the target heating parameters.

[0159] The target heating parameters include the target heating temperature of the object being heated, the target heating time for the object to reach the target heating temperature, and the dimensions of the heating cavity along the direction of movement of the object being heated.

[0160] The content of step 310 can be found in the relevant description in step 210, and will not be repeated here.

[0161] 320. Based on the target heating time and the dimensions of the heating cavity along the direction of movement of the heated object, set the initial transmission speed of the first conveying mechanism.

[0162] In some embodiments, the initial transmission speed V of the first conveying mechanism is set to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, t is the target heating time, and t1 is the preset time.

[0163] In some embodiments, the first conveying mechanism is a roller conveying mechanism. The initial rotational speed N of the roller of the first conveying mechanism can be set to satisfy: (1+5%)L / 2πRt≤N≤(1+35%)L / 2πRt, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, R is the radius of the roller of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

[0164] 330. Set the initial temperature of the heating furnace according to the target heating temperature.

[0165] In some embodiments, the initial temperature of the heating furnace may include the initial temperature of the heating cavity, and the initial temperature of the heating cavity may be set to be greater than or equal to the target heating temperature.

[0166] In some embodiments, the heating cavity includes a first cavity and a second cavity, the second cavity being located downstream of the first cavity, and an initial temperature T is set for the first cavity. 初始1 Satisfy: (T+5℃)≤T 初始1 ≤(T+15℃); and, set the initial temperature T of the second cavity. 初始2 Satisfy: T≤T 初始2 ≤(T+8℃), where T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

[0167] The settings for the initial transmission speed of the first conveying mechanism and the initial temperature of the heating furnace in steps 320 and 330 can be found in the relevant description in step 220, and will not be repeated here.

[0168] In some embodiments, the first sub-target temperature corresponding to the first target point of the heated object is 0.85T to 0.95T. The first target point is located at a distance of 1 / 2L1 to 5 / 6L1 from the inlet of the heating cavity. Multiple target points include the first target point.

[0169] L1 is the dimension of the first cavity along the direction of movement of the object being heated.

[0170] As an example, the first sub-target temperature corresponding to the first target point of the heated object is 0.9T. The first target point 551 is located at 2 / 3L1 from the inlet of the heating cavity. For example, the target heating temperature can be 75℃, and the first sub-target temperature corresponding to the first target point can be 67.5℃.

[0171] In this embodiment of the application, by setting the first sub-target temperature corresponding to the first target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism can be reasonably adjusted according to the temperature of the heated object at the first target point and the first sub-target temperature, so that the temperature of the heated object when it moves to the next target point can approach or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature.

[0172] In some embodiments, the second sub-target temperature corresponding to the second target point is 0.90T to 0.98T. The second target point is located at a distance L1 from the inlet of the heating chamber. Multiple target points include the second target point, which is located downstream of the first target point.

[0173] As an example, the second sub-target temperature corresponding to the second target point of the heated object is 0.95T. The second target point is set at a distance L1 from the inlet of the heating chamber. For example, the target heating temperature can be 75℃, and the second sub-target temperature corresponding to the second target point can be 71.25℃.

[0174] In this embodiment of the application, by setting the second sub-target temperature corresponding to the second target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity can be reasonably adjusted according to the temperature of the heated object at the second target point and the second sub-target temperature, so that the temperature of the heated object when it moves to the next target point can approach or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature.

[0175] In some embodiments, the third sub-target temperature corresponding to the third target point of the heated object is 0.95T to T. The third target point is located at a distance of (L1+1 / 3L2) to (L1+2 / 3L2) from the inlet of the heating cavity. Multiple target points include the third target point. The third target point is located downstream of the second target point.

[0176] L2 is the dimension of the second cavity along the direction of movement of the object being heated.

[0177] As an example, the third sub-target temperature corresponding to the third target point of the heated object is T. The third target point is set at a distance of (L1+1 / 2L2) from the inlet of the heating cavity. For example, the target heating temperature can be 75℃, and the third sub-target temperature corresponding to the third target point can be 75℃.

[0178] In this embodiment of the application, by setting the third sub-target temperature corresponding to the third target point within a reasonable range, the temperature of the heating cavity and / or the transmission speed of the first conveying mechanism in the heating cavity can be reasonably adjusted according to the temperature of the heated object at the third target point and the third sub-target temperature, so that the temperature of the heated object can meet the requirements of the target heating temperature when it moves to the outlet of the heating cavity.

[0179] 340a, when the temperature of the first target point when the heated object moves to the first target point is not equal to the temperature of the first sub-target point and the difference is within a preset range, the transmission speed of the first conveying mechanism is adjusted.

[0180] In this embodiment of the application, when the first temperature and the first sub-target temperature are not equal and the difference is relatively small, the transmission speed of the first transmission mechanism can be adjusted.

[0181] The difference between the first temperature and the first sub-target temperature can be either the first temperature minus the second sub-target temperature, or the first sub-target temperature minus the first temperature.

[0182] The first sub-target temperature is lower than the target heating temperature and lower than the temperature of the first cavity. For example, the first sub-target temperature is set to 0.9T. As the object being heated continues to move past the first target point, its temperature will continue to rise under the heating of the heating cavity.

[0183] At the first target point, if the first temperature of the heated object does not meet the requirement of the first sub-target temperature and the difference between the two is relatively small, it indicates that the temperature of the heated object needs a small adjustment, meaning that the adjustable range of the heated object's temperature is relatively small. If the temperature of the heated object is adjusted by adjusting the temperature of the heating chamber, if the temperature control of the heating chamber is not proper, it is easy for the temperature change of the heated object to exceed the aforementioned small adjustment requirement.

[0184] Therefore, in the embodiments of this application, when the first temperature and the first sub-target temperature are not equal and the difference is small, the heating time when the heated object moves from the first target point to the next target point can be adjusted by adjusting the transmission speed of the first conveying mechanism. This allows the temperature rise of the heated object to be within the aforementioned small adjustable range, making it easier for the heated object to approach or meet the requirements of the sub-target temperature corresponding to the next target point when it moves to the next target point.

[0185] In some embodiments, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the value is less than or equal to T1, increase the transmission speed of the first transmission mechanism.

[0186] In some embodiments, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21＜ When the value is 0, reduce the transmission speed of the first transmission mechanism.

[0187] When the difference between the first temperature and the first sub-target temperature is small and the first temperature is greater than the first sub-target temperature, the heating time of the heated object moving to the next target point can be reduced by increasing the transmission speed of the first conveying mechanism. This can make the temperature rise of the heated object when it moves from the first target point to the next target point relatively small, so that the temperature of the heated object when it moves to the next target point is as close as possible to or meets the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity meets the requirements of the target heating temperature as much as possible.

[0188] When the difference between the first temperature and the first sub-target temperature is small and the first temperature is lower than the first sub-target temperature, the transmission speed of the first conveying mechanism can be reduced to increase the heating time for the heated object to move to the next target or to the outlet of the heating cavity. This allows the temperature rise of the heated object when it moves from the first target point to the next target point to be relatively larger, thereby making the temperature of the heated object when it moves to the next target point as close as possible to or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity meets the requirements of the target heating temperature as much as possible.

[0189] In some embodiments, when the first temperature of the heated object when it moves to the first target point is not equal to the first sub-target temperature and the difference is within a preset range, the transmission speed of the first sub-transmission mechanism is adjusted, wherein the first sub-transmission mechanism includes the portion of the first transmission mechanism located after the first target point.

[0190] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the value is ≤T1, increase the transmission speed of the first sub-transmission mechanism.

[0191] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21＜ In the case of 0, reduce the transmission speed of the first sub-transmission mechanism.

[0192] If the transmission speed of the first conveying mechanism needs to be adjusted, the transmission speed of the heated object will differ before and after the first target point. For example, before the heated object moves to the first target point, the transmission speed of the first conveying mechanism is speed 1; after the heated object reaches the first target point, the transmission speed of the first conveying mechanism is speed 2. If multiple heated objects are moved and heated sequentially in the heating cavity, the transmission speed of the first conveying mechanism needs to be set to speed 1 before the first target point; and the speed of the first conveying mechanism needs to be set to speed 2 after the first target point.

[0193] Therefore, when multiple objects are moved and heated sequentially in the heating furnace, the transmission speed of the conveying mechanism before and after the first heating point needs to be adjusted separately.

[0194] In this embodiment of the application, when the heated object moves to the first target point, if the temperature of the heated object does not meet the requirements of the first sub-target temperature and the difference between the two is small, the transmission speed of the first conveying mechanism located after the first target point can be adjusted to adjust the heating time when the heated object reaches the next target point or the outlet of the heating cavity. This does not affect the transmission speed of other parts of the first conveying mechanism, such as the part before the first target point, and can meet the requirement of continuous online heating of a large number of heated objects, thereby improving heating efficiency.

[0195] 340b, when the temperature of the first target point when the heated object moves to the first target point is not equal to the temperature of the first sub-target point and the difference is outside the preset range, the temperature of the first cavity is adjusted.

[0196] In this embodiment, when the first temperature and the first sub-target temperature are not equal and the difference is large, it indicates that the temperature of the object to be heated needs a significant adjustment. Adjusting the transmission speed of the first conveying mechanism is not easily sufficient to meet this large adjustment requirement. Since the heating of the object after the first target point can still be carried out in the cavity downstream of the first target point in the first cavity, the temperature of the object to be heated can be adjusted by adjusting the temperature of the first cavity.

[0197] In this embodiment of the application, when the first temperature and the first sub-target temperature are not equal and the difference is large, by adjusting the temperature of the first cavity, the temperature of the heated object when it moves to the next target point can be close to or meet the requirements of the sub-target temperature corresponding to the next target point, so that the temperature of the heated object when it moves to the outlet of the heating cavity can meet the requirements of the target heating temperature.

[0198] In some embodiments, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: T 11 -T 21If the temperature is greater than T1, reduce the temperature of the first cavity.

[0199] In some embodiments, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the first cavity is increased.

[0200] When the first temperature differs significantly from the first sub-target temperature and the first temperature is greater than the first sub-target temperature, the temperature rise of the object to be heated in the subsequent heating process will be relatively small. Therefore, by reducing the temperature of the first cavity, the object to be heated will experience a small temperature rise during the movement, so that the temperature of the object to be heated when it moves to the next target point is close to or meets the requirements of the sub-target temperature corresponding to the next target point. In this way, the temperature of the object to be heated when it moves to the outlet of the heating cavity will meet the requirements of the target heating temperature as much as possible.

[0201] When the first temperature differs significantly from the first sub-target temperature and the first temperature is lower than the first sub-target temperature, the temperature rise of the object to be heated in the subsequent heating process will be relatively large. Therefore, by increasing the temperature of the second cavity, the object to be heated will experience a significant temperature rise during the movement process, so that the temperature of the object to be heated when it moves to the next target point is close to or meets the requirements of the sub-target temperature corresponding to the next target point. This will ensure that the temperature of the object to be heated when it moves to the outlet of the heating cavity meets the requirements of the target heating temperature as much as possible.

[0202] In some embodiments, the first cavity may include a first sub-cavity and a second sub-cavity, wherein the first sub-cavity is located between the inlet of the heating cavity and the first target point, and the second sub-cavity is located between the first target point and the second target point. If the first temperature and the first sub-target temperature are not equal and the difference is outside a preset range, the temperature of the second sub-cavity can be adjusted.

[0203] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: T 11 -T 21 When the temperature is greater than T1, the temperature of the second sub-cavity can be reduced.

[0204] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the second sub-cavity can be increased.

[0205] If, during the movement of the object being heated, the temperature of the heating chamber after the first target point needs to be adjusted, for example, the temperature of the heating chamber needs to be set to temperature 1 before the object reaches the first target point, and to temperature 2 after the object reaches the first target point, then for multiple objects requiring heating, as they move and are heated sequentially, the temperatures before and after the first target point need to be set to different temperatures, such as temperature 1 and temperature 2.

[0206] Therefore, when multiple objects are moved and heated sequentially in the heating furnace, the temperature of the cavity before and after the first target point needs to be adjusted separately.

[0207] In this embodiment, when the object to be heated moves to the first target point, if the temperature of the object does not meet the requirement of the first sub-target temperature and the difference between the two is large, the temperature of the first sub-cavity located between the first target point and the second target point can be adjusted separately to adjust the temperature of the object to be heated between the first target point and the second target point. This heating method has virtually no impact on objects to be heated that are simultaneously located before the first target point and after the second target point, and can meet the requirement of continuous online heating of a large number of objects, thereby improving heating efficiency.

[0208] 340c, when the temperature of the object being heated is equal to the temperature of the first sub-target when it moves to the first target point, the transmission speed of the first transmission structure and the temperature of the first cavity are not adjusted.

[0209] If the first temperature meets the requirements of the first sub-target temperature, it means that the heated object can basically be heated according to the preset heating rate during the movement. When the heated object moves to the next target point, its temperature can approach or meet the sub-target temperature corresponding to the next target point, so that when the heated object moves to the outlet of the heating cavity, its temperature can meet the requirements of the target heating temperature. Therefore, the transmission speed of the first conveying mechanism and the temperature of the first cavity do not need to be adjusted.

[0210] 350a, when the second temperature of the heated object when it moves to the second target point is greater than the second sub-target temperature of the heated object at the second target point, the transmission speed of the first conveying mechanism is increased.

[0211] 350b, when the second temperature of the heated object is less than the second sub-target temperature when it moves to the second target point, the transmission speed of the first conveying mechanism is reduced.

[0212] Compared to the sub-target temperature corresponding to the first target point, the sub-target temperature corresponding to the second target point differs less from the target heating temperature. For example, if the target heating temperature is 75℃, the first sub-target temperature corresponding to the first target point could be 67.5℃, and the second sub-target temperature corresponding to the second target point could be 71.25℃. However, as the object being heated moves from the first target point to the second target point, its temperature increases and gets closer to the target heating temperature, while the adjustable range of the object's temperature decreases. Therefore, at the second target point, adjusting the temperature of the heating cavity to adjust the temperature of the object can easily cause the temperature of the object to change beyond its adjustable range if the temperature control of the heating cavity is inadequate.

[0213] Therefore, when the object to be heated moves to the second target point, if the temperature of the object does not meet the requirement of the sub-target temperature corresponding to the second target point, the heating time of the object can be adjusted by adjusting the transmission speed of the first conveying mechanism. By controlling the heating time of the object, it is easier to control the magnitude of the temperature rise and prevent large temperature jumps.

[0214] When the temperature of the object to be heated is higher than the temperature of the second sub-target, the heating time of the object to be heated can be reduced by increasing the transmission speed of the first conveying mechanism. This allows the temperature rise of the object to be heated from the first target point to the next target point to be relatively small within the aforementioned adjustment range. Consequently, when the object to be heated moves to the next target point, its temperature is as close as possible to or meets the requirements of the sub-target temperature corresponding to the next target point, so that when the object to be heated moves to the outlet of the heating cavity, its temperature meets the requirements of the target heating temperature as much as possible.

[0215] Similarly, when the temperature of the object to be heated is lower than the second sub-target temperature, the heating time of the object to be heated can be increased by reducing the transmission speed of the first conveying mechanism. This allows the temperature rise of the object to be heated from the first target point to the next target point to be relatively larger within the aforementioned adjustable range. Consequently, when the object to be heated moves to the next target point, its temperature is as close as possible to or meets the requirements of the sub-target temperature corresponding to the next target point, so that when the object to be heated moves to the outlet of the heating cavity, its temperature meets the requirements of the target heating temperature as much as possible.

[0216] In some embodiments, if the second temperature of the heated object when it moves to the second target point is greater than the second sub-target temperature of the heated object at the second target point, the transmission speed of the second sub-transmission mechanism is increased, and the second sub-transmission mechanism includes the portion of the first transmission mechanism located after the second target point.

[0217] In some embodiments, if the second temperature of the heated object when it moves to the second target point is less than the second sub-target temperature of the heated object at the second target point, the transmission speed of the second sub-transmission mechanism is reduced. The second sub-transmission mechanism includes the portion of the first transmission mechanism located after the second target point.

[0218] In this embodiment, if the transmission speed of the first conveying mechanism is adjusted, the transmission speed of the heated object will differ before and after the second target point. For example, before the heated object moves to the second target point, the transmission speed of the first conveying mechanism needs to be set to speed 1; after the heated object reaches the second target point, the transmission speed of the first conveying mechanism needs to be set to speed 2. If multiple heated objects are moved and heated sequentially in the heating cavity, the transmission speed of the first conveying mechanism needs to be speed 1 before the second target point; after the second target point, the speed of the first conveying mechanism needs to be set to speed 2.

[0219] Therefore, when multiple objects are moved and heated sequentially in the heating furnace, the transmission speed of the first conveyor before and after the second target point needs to be adjusted separately.

[0220] In this embodiment of the application, when the heated object moves to the second target point, if the temperature of the heated object does not meet the requirements of the second sub-target temperature, the transmission speed of the first conveying mechanism between the second target point and the third target point can be adjusted to adjust the heating time when the heated object reaches the next target point or the outlet of the heating cavity, without affecting the transmission speed of other parts of the first conveying mechanism, which can meet the online continuous heating of a large number of heated objects and improve heating efficiency.

[0221] 350°C, when the second temperature of the heated object is equal to the second sub-target temperature when it moves to the second target point, the transmission speed of the first conveying mechanism and the temperature of the second cavity are not adjusted.

[0222] If the second temperature meets the requirements of the second sub-target temperature, it means that the heated object can basically be heated according to the preset heating rate during the movement. When the heated object moves to the next target point, its temperature can approach or meet the sub-target temperature corresponding to the next target point, so that when the heated object moves to the outlet of the heating cavity, its temperature can meet the requirements of the target heating temperature. Therefore, the transmission speed of the first conveying mechanism and the temperature of the second cavity do not need to be adjusted.

[0223] 360a, if the third temperature when the heated object moves to the third target point is greater than the third sub-target temperature corresponding to the heated object at the third target point, the temperature of the second cavity is reduced.

[0224] When the object to be heated moves to the third target point, its temperature is very close to the target heating temperature. At this point, if the temperature of the object to be heated is greater than the sub-target temperature corresponding to the third target point, and the third target point is relatively close to the outlet of the heating cavity, then as the object to be heated continues to move away from the third target point, if the temperature of the heating cavity is not adjusted in time, the temperature of the object to be heated can easily exceed the target heating temperature, making the risk of overheating of the object to be heated quite high.

[0225] Therefore, in this embodiment of the application, when the third temperature of the heated object when it moves to the third target point is greater than the third sub-target temperature of the heated object at the third target point, the temperature of the second cavity can be reduced, thereby adjusting the temperature of the heated object. For example, the temperature rise of the heated object can be reduced, and the risk of the temperature of the heated object exceeding the target heating temperature can be reduced.

[0226] In some embodiments, the second cavity includes a third sub-cavity and a fourth sub-cavity, the third sub-cavity being located between the second target point and the third target point, and the fourth sub-cavity being located between the third target point and the outlet of the heating cavity. If the third temperature of the heated object when it moves to the third target point is greater than the third sub-target temperature corresponding to the heated object at the third target point, the temperature of the fourth sub-cavity is reduced.

[0227] If, during the movement of the object being heated, the temperature of the heating cavity after the third target point needs to be adjusted, for example, the temperature of the heating cavity before the third target point is temperature 1, and the temperature after the third target point is temperature 2, then for multiple objects requiring heating, as they move and are heated sequentially, the temperatures of the cavities before and after the third target point need to be set to different temperatures, such as temperature 1 and temperature 2.

[0228] Therefore, when multiple objects are moved and heated sequentially in the heating furnace, the temperature of the cavity before and after the third target point needs to be adjusted separately.

[0229] In this embodiment, if the temperature of the object being heated does not meet the requirements of the third sub-target temperature when the object is moved to the third target point, the temperature of the fourth sub-cavity located between the third target point and the outlet of the heating cavity can be adjusted separately to regulate the temperature of the object being heated between the third target point and the outlet of the heating cavity. This heating method has virtually no impact on objects being heated that are simultaneously located before the third target point and after the outlet of the heating cavity, enabling continuous online heating of a large number of objects and improving heating efficiency.

[0230] 360b, when the third temperature of the heated object is less than the third sub-target temperature when it moves to the third target point, the transmission speed of the first conveying mechanism is reduced.

[0231] Similarly, when the object being heated moves to the third target point, its temperature is very close to the target heating temperature. At this point, if the temperature of the object being heated is lower than the sub-target temperature corresponding to the third target point, it means that the object needs to be heated further, but the amount of heating is relatively small. Because adjusting the temperature of the heating cavity makes it difficult to precisely adjust the amount of heating on the object, it is easy for the temperature of the object to exceed the target heating temperature during subsequent moving and heating processes.

[0232] Therefore, in this embodiment of the application, when the third temperature is less than the third sub-target temperature, the heating time of the object can be increased by reducing the transmission speed of the first conveying mechanism, which can reduce the risk of the object's temperature exceeding the target temperature during subsequent moving heating process, thereby meeting the target heating temperature requirement.

[0233] In some embodiments, if the third temperature when the heated object moves to the third target point is less than the third sub-target temperature, the transmission speed of the third sub-transmission mechanism is reduced. The third sub-transmission mechanism includes the portion of the first transmission mechanism located after the third target point.

[0234] In some embodiments, in the heating cavity, the cavity temperature in each of the four cavity segments before the first target point, between the first and second target points, between the second and third target points, and after the third target point can be adjusted individually, and / or the transmission speed of the first conveying mechanism in each cavity segment can be adjusted individually.

[0235] 360c, when the third temperature of the heated object is equal to the third sub-target temperature when it moves to the third target point, the transmission speed of the first conveying mechanism and the temperature of the second cavity are not adjusted.

[0236] If the third temperature meets the requirements of the third sub-target temperature, it means that the heated object can basically be heated according to the preset heating rate during the movement process. When the heated object moves to the outlet of the heating cavity, its temperature can meet the requirements of the target heating temperature. Therefore, the transmission speed of the first conveying mechanism and the temperature of the second cavity do not need to be adjusted.

[0237] Figure 4 This is a schematic flowchart of the heating method provided in an embodiment of this application.

[0238] 410, Obtain the target heating parameters.

[0239] The target heating parameters include the target heating temperature of the object being heated, the target heating time for the object to reach the target heating temperature, and the dimensions of the heating cavity along the direction of movement of the object being heated.

[0240] 420. Based on the target heating time and the dimensions of the heating cavity along the direction of movement of the heated object, set the initial transmission speed of the first conveying mechanism.

[0241] 430. Set the initial temperature of the heating furnace according to the target heating temperature.

[0242] The contents of steps 410 to 430 can be found in the relevant descriptions in steps 210 and 220, and will not be repeated here.

[0243] In some embodiments, the heating furnace further includes an insulation cavity located downstream of the heating cavity, and the initial temperature of the insulation cavity is set to T.

[0244] T represents the target heating temperature.

[0245] In this embodiment of the application, the temperature of the heat preservation cavity is set to T, which facilitates the heat preservation of the heated object when it is heated to the target heating temperature and moved into the heat preservation cavity.

[0246] 440. When the object to be heated is moved to the target point of the heating cavity by the first conveying mechanism, the temperature of the object to be heated and the sub-target temperature of the object to be heated at the target point are obtained.

[0247] At least one target point is provided between the two ends of the heating cavity along the moving direction of the object being heated. The at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object being heated.

[0248] At least one target point may include one or more target points. The content of one or more target points can be referred to the description above, and will not be repeated here.

[0249] The content of step 440 can be found in the descriptions above, such as steps 110 and 230, and will not be repeated here.

[0250] 450. The parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the target point.

[0251] The content of step 450 can be found in the relevant descriptions above, such as step 220, and will not be repeated here.

[0252] 460, when the object to be heated moves to the end point of the heating cavity and the temperature of the object to be heated meets the target heating temperature, determine the target position of the object to be heated in the heating cavity when the object to be heated reaches the target heating temperature and the target transmission speed when the first transmission mechanism transmits the object to be heated after the target position.

[0253] 470, obtain the dimensions of the insulation cavity along the moving direction of the heated object and the target insulation time of the heated object.

[0254] The target heat preservation time can be determined based on production needs, such as the aging time of individual battery cells.

[0255] 480. Set the transmission speed of the second conveying mechanism according to the target position, target transmission speed, size of the heat preservation cavity along the moving direction of the heated object, and target heat preservation time.

[0256] The second conveying mechanism is located in the heat-insulating cavity and is downstream of the first conveying mechanism.

[0257] In some embodiments, the heated object may have already reached and maintained its target heating temperature before moving to the outlet of the heating chamber. Therefore, the heated object may have been kept at that temperature for a certain period of time before moving to the insulation chamber.

[0258] In some embodiments, the heated object may reach the target heating temperature just as it moves to the outlet of the heating chamber.

[0259] Therefore, the holding time of the heated object in the heating cavity, such as the second cavity, can be determined based on the target location and the target transmission speed. For example, the distance between the target location and the outlet of the heating cavity can be determined based on the target location, and the holding time of the heated object in the heating cavity can be calculated based on this distance and the target transmission speed.

[0260] Based on the target heat preservation time and the heat preservation time of the object being heated in the heating cavity, the heat preservation time required for the object to be heated in the heat preservation cavity can be obtained. Based on this heat preservation time and the length of the heat preservation cavity, the transmission speed of the second conveying mechanism in the heat preservation cavity can be calculated.

[0261] In some embodiments, the second conveying mechanism in the insulation cavity can be a roller conveying mechanism. For example, both the second conveying mechanism in the insulation cavity and the first conveying mechanism in the heating cavity are roller conveying mechanisms.

[0262] In this embodiment of the application, the transmission speed of the second conveying mechanism in the heat preservation cavity can be accurately set by the target position, target transmission speed, size of the heat preservation cavity along the moving direction of the heated object, and target heat preservation time, so as to reasonably preserve the heated object.

[0263] 490, control the object to be heated to move to the heat preservation cavity for heat preservation.

[0264] In this embodiment of the application, by setting up a heat-insulating cavity, the object to be heated can be kept warm in the heat-insulating cavity, thereby realizing continuous operation of heating and heat preservation of the object to be heated.

[0265] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0266] The heating method of the embodiments of this application has been described in detail above. The following will be combined with… Figures 5 to 7 The heating furnace 500 of the present application embodiments is described in detail below. The technical features described in the method embodiments are applicable to the following embodiments of the heating furnace 500.

[0267] like Figure 5 and Figure 6 As shown, the heating furnace 500 includes the following parts or all of them.

[0268] The heating furnace 500 includes a heating cavity 510, a first conveying mechanism 520, a heating object temperature monitoring module 530, and a control module 540.

[0269] The heating cavity 510 is used to heat the object 10 during its movement. At least one target point 550 is provided between the two ends of the heating cavity 510 along the direction of movement of the object 10. The at least one target point 550 includes a target point whose sub-target temperature is lower than the target heating temperature of the object 10.

[0270] The first conveying mechanism 520 is disposed in the heating cavity 510 and is used to move the heated object 10 in the heating cavity 510.

[0271] The temperature monitoring module 530 for the heated object 10 is used to monitor the temperature of the heated object 10.

[0272] The control module 540 is used to control the adjustment of the parameters of the heating furnace 500 based on the temperature of the heating object 10 at the target point 550 and the sub-target temperature corresponding to the target point 550 monitored by the first heating module. The parameters of the heating furnace 500 include at least one of the following: the temperature of the heating cavity 510 and the transmission speed of the first conveying mechanism 520.

[0273] The object to be heated 10 can move from the inlet 513 of the heating chamber to the outlet 514 of the heating chamber via the first conveying mechanism 520. During the movement of the object to be heated 10, it is heated by the heating furnace 500 to reach the target heating temperature.

[0274] The first conveying mechanism 520 may include different forms. For example, the first conveying mechanism 520 may include a conveyor belt, which can be used to move the heated object 10. For example, the first conveying mechanism 520 may also include a roller, which uses the rotation of the roller to move the heated object 10 from the inlet 513 of the heating chamber to the outlet 514 of the heating chamber.

[0275] The target heating temperature is the temperature at which the object to be heated 10 needs to be heated. For example, the temperature for aging treatment of a single battery cell.

[0276] During the movement of the heated object 10, the temperature of the heated object 10 gradually increases until the target heating temperature is reached. During the heating process of the heated object 10, if the heated object 10 can reach the corresponding specified temperature (sub-target temperature) at some specified positions (target point 550), the target heating temperature requirement can be met when the heated object 10 moves to the vicinity of the outlet 514 of the heating cavity.

[0277] Therefore, in this embodiment, at least one target point 550 can be set between the inlet 513 and the outlet of the heating chamber of the heating furnace 500, and each target point 550 is provided with its corresponding sub-target temperature. Based on the temperature of the heated object 10 at each target point 550 and the corresponding sub-target temperature, it is determined whether to adjust the temperature of the heating chamber 510 and / or the transmission speed of the first conveying mechanism 520 in the heating chamber 510, so that the heated object 10 can meet the target heating temperature requirement when it moves to the vicinity of the outlet 514 of the heating chamber.

[0278] For example, a target point 550 can be set between the two ends of the heating cavity 510 along the moving direction of the heated object 10, and the sub-target temperature corresponding to the target point 550 is lower than the target heating temperature.

[0279] For example, three target points 550 can be set between the two ends of the heating cavity 510 along the moving direction of the heated object 10, and among these three target points 550, there is a target point 550 with a sub-target temperature lower than the target heating temperature.

[0280] As an example, the temperature monitoring module 530 of the heated object 10 can be a temperature sensor used to monitor the temperature of the heated object 10, such as the temperature of the surface of the heated object 10.

[0281] As an example, if the temperature of the heated object 10 meets the requirements of the sub-target temperature when the heated object 10 moves to the target point 550, the control module 540 may not adjust the temperature of the heating cavity 510 or the transmission speed of the conveying mechanism in the heating cavity 510.

[0282] As an example, when the object to be heated 10 moves to the target point 550, if the temperature of the object to be heated 10 does not meet the sub-target temperature requirement, the control module 540 can control and adjust parameters of the heating furnace 500, such as the temperature of the heating chamber 510 and / or the transmission speed of the first conveying mechanism 520 in the heating chamber 510. For example, if the temperature of the object to be heated 10 is lower than the sub-target temperature, the temperature of the heating chamber 510 can be increased and / or the rotation speed of the first conveying mechanism 520 can be decreased. For example, if the temperature of the object to be heated 10 is higher than the sub-target temperature (which is lower than the target heating temperature), the temperature of the heating chamber 510 can be decreased and / or the rotation speed of the first conveying mechanism can be increased.

[0283] In this embodiment, a target point 550 is set in the heating cavity 510 of the heating furnace 500. During the heating process of the heated object 10, the temperature of the heated object 10 when it moves to the target point 550 is compared with the corresponding sub-target temperature to determine whether to adjust the parameters of the heating furnace 500, such as the temperature of the heating cavity 510 and / or the transmission speed of the first conveying mechanism 520 in the heating cavity 510, so that the heated object 10 can meet the target heating temperature requirement when it moves to the vicinity of the outlet 514 of the heating cavity. In this way, the possibility of the heated object 10 being at a high temperature for a long time can be reduced, thereby reducing the risk of the heated object 10 overheating, and at the same time improving the heating uniformity of the heated object 10.

[0284] In some embodiments, at least one target point 550 includes a target point 550, wherein the sub-target temperature of the target point 550 is less than the target heating temperature.

[0285] Alternatively, at least one target point 550 may include multiple target points 550, wherein the target point 550 that is closer to the outlet 514 of the heating cavity has a higher sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

[0286] The description of one or more target points 550 in this embodiment can be found in the relevant content of the method embodiment, and will not be repeated here for the sake of brevity.

[0287] In some embodiments, the heating furnace 500 further includes a loading mechanism 560 for carrying the object to be heated 10.

[0288] As an example, a loading mechanism 560 can carry multiple heated objects 10.

[0289] As an example, the loading mechanism 560 can be stacked along the height direction of the heating furnace 500.

[0290] In this embodiment, by providing a loading mechanism 560, multiple heating objects 10 can be carried, which facilitates the heating of multiple heating objects 10 during their movement within the heating cavity 510, thereby improving production efficiency.

[0291] In some embodiments, the temperature monitoring module 530 of the heated object 10 is disposed on the loading mechanism 560.

[0292] As an example, the temperature monitoring module 530 of the heated object 10 can be fixed to the loading mechanism 560. For example, the temperature monitoring module 530 of the heated object 10 can be fixed to the loading mechanism 560 by means of adhesive, bolts, etc.

[0293] In this embodiment of the application, by setting the temperature monitoring module 530 of the heated object 10 on the carrying mechanism 560, it is convenient to monitor the temperature of the heated object 10 carried on the carrying mechanism 560.

[0294] In some embodiments, one end of the temperature monitoring module 530 of the heated object 10 is connected to the heated object 10 and is used to monitor the temperature of the heated object 10.

[0295] As an example, the temperature monitoring module 530 of the heated object 10 can be a contact temperature sensor, one end of which is in contact with the surface of the heated object 10 to monitor the temperature of the surface of the heated object 10.

[0296] In this embodiment of the application, by connecting one end of the temperature monitoring module 530 of the heated object 10 to the heated object 10, the temperature of the heated object 10 in the heating cavity 510 can be accurately detected.

[0297] In some embodiments, the other end of the heating object 10 temperature monitoring module 530 is connected to the control module 540 so that the control module 540 acquires the temperature of the heating object 10 monitored by the heating object 10 temperature monitoring module 530.

[0298] The temperature monitoring module 530 of the heated object 10 can send the monitored temperature to the control module 540 so that the control module 540 can obtain the temperature of the heated object 10.

[0299] In this embodiment, the other end of the temperature monitoring module 530 for the heated object 10 is connected to the control module 540, which enables the control module 540 to obtain the temperature of the heated object 10. Based on the temperature of the heated object 10 at the target point 550 and the sub-target temperature corresponding to the target point 550, the parameters of the heating furnace 500 can be adjusted.

[0300] In some embodiments, the control module 540 is configured to acquire target heating parameters, including a target heating temperature of the heated object 10, a target heating time for the heated object 10 to reach the target heating temperature, and the dimension of the heating cavity 510 along the moving direction of the heated object 10; to set an initial transmission speed of the first conveying mechanism 520 in the heating cavity 510 based on the target heating time and the dimension of the heating cavity 510 along the moving direction of the heated object 10; and to set an initial temperature of the heating furnace 500 based on the target heating temperature.

[0301] In some embodiments, the control module 540 is used to set the initial transmission speed V to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity 510 along the moving direction of the heated object 10, t is the target heating time, and t1 is the preset time.

[0302] In some embodiments, the first conveying mechanism 520 is a roller conveying mechanism. The control module 540 can be used to set the initial rotational speed N of the roller of the first conveying mechanism 520 in the heating cavity 510 to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where t≤t1, L is the dimension of the heating cavity 510 along the moving direction of the heated object 10, R is the radius of the roller of the first conveying mechanism 520, t is the target heating time, and t1 is the preset time.

[0303] Roller conveyor mechanism such as Figure 6 As shown, multiple rollers are arranged in the heating cavity 510 along the moving direction of the heated object 10. The rotation of the rollers drives the heated object 10 to move on the rollers. Typically, the outer contour of the roller is cylindrical, and the radius of the cylinder is the radius of the roller.

[0304] In some embodiments, the heating cavity 510 includes a first cavity 511 and a second cavity 512, with the second cavity 512 located downstream of the first cavity 511. The control module 540 is used to set the initial temperature T of the first cavity 511. 初始1 Satisfy: (T+5)℃≤T 初始1 ≤(T+15)℃; and, set the initial temperature T of the second cavity 512. 初始2 Satisfy: T≤T 初始2≤(T+8)℃, where T is the target heating temperature, and the initial temperature of the second cavity 512 is greater than the initial temperature of the first cavity 511.

[0305] For ease of understanding, the ports of the heating cavity 510 are described below. In this embodiment, the heating cavity 510 includes an upstream port and a downstream port. The upstream port may also be referred to as the inlet 513 of the heating cavity, and the downstream port may also be referred to as the outlet 514 of the heating cavity.

[0306] The inlet 513 of the heating chamber can also be the inlet of the heating furnace 500.

[0307] Both the first cavity 511 and the second cavity 512 include an upstream port and a downstream port. The upstream port of the first cavity 511 can also be referred to as the inlet of the first cavity 511, and the downstream outlet of the first cavity 511 can also be referred to as the outlet of the first cavity 511. Similarly, the upstream port of the second cavity 512 can also be referred to as the inlet of the second cavity 512, and the downstream port of the second cavity 512 can also be referred to as the outlet of the second cavity 512.

[0308] The outlet of the first cavity 511 is connected to the inlet of the second cavity 512.

[0309] The outlet of the second cavity 512 is also the outlet 514 of the heating cavity.

[0310] In this embodiment, upstream and downstream are relative terms. During the movement of the heating object 10 through the heating furnace 500, the position it passes through first is upstream, and the position it passes through later is downstream.

[0311] In some embodiments, the heating cavity 510 includes a plurality of target points 550, the sub-target temperatures corresponding to the plurality of target points 550 are 0.5T to T, and the plurality of target points 550 are located at 1 / 3L1 to (L1+3 / 4L2) of the distance from the inlet 513 of the heating cavity, where L1 is the dimension of the first cavity 511 along the moving direction of the heated object 10, and L2 is the dimension of the second cavity 512 along the moving direction of the heated object 10.

[0312] In some embodiments, the plurality of target points 550 includes a first target point 551, the first sub-target temperature of the heating object 10 corresponding to the first target point 551 is 0.85T to 0.95T, and the first target point 551 is located at 1 / 2L1 to 5 / 6L1 away from the inlet 513 of the heating cavity.

[0313] As an example, the first sub-target temperature of the heated object 10 corresponding to the first target point 551 is 0.9T, and the first target point 551 is set at 2 / 3L1 away from the inlet 513 of the heating cavity.

[0314] In some embodiments, the plurality of target points 550 further includes a second target point 552, which is located downstream of the first target point 551. The second sub-target temperature of the heated object 10 corresponding to the second target point 552 is 0.90T to 0.98T, and the second target point 552 is located at L1 from the inlet 513 of the heating cavity.

[0315] As an example, the second sub-target temperature of the heated object 10 corresponding to the second target point 552 is 0.95T. The second target point 552 is set at L1 distance from the inlet 513 of the heating cavity, that is, at the outlet of the first cavity 511.

[0316] In some embodiments, the plurality of target points 550 includes a third target point 553, which is located downstream of the second target point 552. The third sub-target temperature of the heated object 10 corresponding to the third target point 553 is 0.95T to T, and the third target point 553 is located at a distance of (L1+1 / 3L2) to (L1+2 / 3L2) from the inlet 513 of the heating cavity.

[0317] As an example, the third sub-target temperature of the heated object 10 at the third target point 553 is T, and the third target point 553 is set at a distance of L1+1 / 2L2 from the inlet 513 of the heating cavity.

[0318] In some embodiments, the control module 540 is configured to adjust the transmission speed of the first conveying mechanism 520 in the heating cavity 510 when the first temperature of the heated object 10 at the first target point 551 is not equal to the first sub-target temperature and the difference is within a preset range; or, when the first temperature is not equal to the first sub-target temperature and the difference is outside the preset range, adjust the temperature of the first cavity 511; or, when the first temperature is equal to the first sub-target temperature, not adjust the transmission speed of the first conveying mechanism 520 and the temperature of the first cavity 511.

[0319] In some embodiments, the control module 540 is configured to operate at a first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the temperature is ≤T1, increase the transmission speed of the first transmission mechanism 520; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 If the value is less than 0, reduce the transmission speed of the first transmission mechanism.

[0320] In some embodiments, the control module 540 is configured to operate at a first temperature T11 With the temperature of the first sub-target T 21 The difference satisfies: T 11 -T 21 If the temperature is greater than T1, lower the temperature of the first cavity 511; or, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the first cavity 511 is increased.

[0321] In some embodiments, when the first temperature of the heated object 10 at the first target point 551 is not equal to the first sub-target temperature and the difference is within a preset range, the transmission speed of the first sub-transmission mechanism is adjusted, wherein the first sub-transmission mechanism includes the portion of the first transmission mechanism 520 located after the first target point 551.

[0322] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: 0 < T 11 -T 21 If the value is ≤T1, increase the transmission speed of the first sub-transmission mechanism.

[0323] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21＜ In the case of 0, reduce the transmission speed of the first sub-transmission mechanism.

[0324] In some embodiments, the first cavity 511 may include a first sub-cavity and a second sub-cavity. The first sub-cavity is located between the inlet 513 of the heating cavity and the first target point 551, and the second sub-cavity is located between the first target point 551 and the second target point 552. If the first temperature and the first sub-target temperature are not equal and the difference is outside a preset range, the temperature of the second sub-cavity can be adjusted.

[0325] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: T 11 -T 21 When the temperature is greater than T1, the temperature of the second sub-cavity can be reduced.

[0326] As an example, at the first temperature T 11 With the temperature of the first sub-target T 21 The difference satisfies: -T1 < T 11 -T 21In this case, the temperature of the second sub-cavity can be increased.

[0327] In some embodiments, the control module 540 is configured to increase the transmission speed of the first conveying mechanism 520 when the second temperature of the heated object 10 when it moves to the second target point 552 is greater than the second sub-target temperature corresponding to the second target point 552; or, decrease the transmission speed of the first conveying mechanism 520 when the second temperature is less than the second sub-target temperature; or, not adjust the transmission speed of the first conveying mechanism 520 and the temperature of the second cavity 512 when the second temperature is equal to the second sub-target temperature.

[0328] In some embodiments, if the second temperature of the heated object 10 when it moves to the second target point 552 is greater than the second sub-target temperature of the heated object 10 at the second target point 552, the transmission speed of the second sub-transmission mechanism is increased. The second sub-transmission mechanism includes the portion of the first transmission mechanism 520 located after the second target point 552.

[0329] In some embodiments, if the second temperature of the heated object 10 when it moves to the second target point 552 is less than the second sub-target temperature of the heated object 10 corresponding to the second target point 552, the transmission speed of the second sub-transmission mechanism is reduced. The second sub-transmission mechanism includes the portion of the first transmission mechanism 520 located after the second target point 552.

[0330] In some embodiments, the control module 540 is configured to reduce the temperature of the second cavity 512 when the third temperature of the heated object 10 at the third target point 553 is greater than the third sub-target temperature of the heated object 10 at the third target point 553; or, reduce the transmission speed of the first conveying mechanism 520 when the third temperature is less than the third sub-target temperature; or, not adjust the transmission speed of the first conveying mechanism 520 and the temperature of the second cavity 512 when the third temperature is equal to the third sub-target temperature.

[0331] In some embodiments, the second cavity 512 includes a third sub-cavity and a fourth sub-cavity. The third sub-cavity is located between the second target point 552 and the third target point 553, and the fourth sub-cavity is located between the third target point 553 and the outlet 514 of the heating cavity. If the third temperature of the heated object 10 when it moves to the third target point 553 is greater than the third sub-target temperature corresponding to the heated object 10 at the third target point 553, the temperature of the fourth sub-cavity is reduced.

[0332] In some embodiments, if the third temperature when the heated object 10 moves to the third target point 553 is less than the third sub-target temperature, the transmission speed of the third sub-transmission mechanism is reduced. The third sub-transmission mechanism includes the portion of the first transmission mechanism located after the third target point 553.

[0333] In some embodiments, such as Figure 7 As shown, the heating furnace 500 also includes a heat preservation cavity 570, which is located downstream of the heating cavity 510. A control module 540 is used to set the initial temperature of the heat preservation cavity 570 to T.

[0334] The insulation cavity 570 includes an upstream port and a downstream port. The upstream port of the insulation cavity 570 may also be referred to as the inlet 571 of the insulation cavity, and the downstream port of the insulation cavity 570 may also be referred to as the outlet 572 of the insulation cavity.

[0335] The inlet 571 of the heat-insulating cavity is connected to the outlet 514 of the heating cavity.

[0336] The outlet 572 of the insulation cavity is also the outlet of the heating furnace 500.

[0337] In some embodiments, the control module 540 is configured to control the heated object 10 to move to the heat preservation cavity 570 for heat preservation when the heated object 10 moves to the end point of the heating cavity 510 and the temperature of the heated object 10 meets the target heating temperature.

[0338] In some embodiments, the control module 540 is configured to determine the target position of the heated object 10 in the heating cavity 510 when the heated object 10 reaches the target heating temperature and the target transmission speed of the first transmission mechanism 520 when the heated object 10 is transmitted after the target position; determine the size of the heat preservation cavity 570 along the moving direction of the heated object 10 and the target heat preservation time of the heated object 10; and set the transmission speed of the second transmission mechanism 580 in the heat preservation cavity 570 according to the target position, target speed, size of the heat preservation cavity 570 along the moving direction of the heated object 10 and target heat preservation time.

[0339] In some embodiments, the heated object 10 includes a battery cell.

[0340] In some embodiments, the heating furnace 500 further includes a cavity temperature monitoring module, such as a temperature sensor, which is disposed within a cavity, such as a heating cavity 510 and / or a heat preservation cavity 570, for monitoring the temperature of the heating cavity 510 and / or the heat preservation cavity 570.

[0341] In some embodiments, the heating furnace 500 further includes a heating source such as a resistance wire, which is disposed within a cavity such as a heating cavity 510 and / or a heat-insulating cavity 570. For example, the resistance wire may be disposed on the inner wall of the heating furnace 500 and extend along the direction of movement of the object being heated.

[0342] In this application, the technical features described in the method embodiments are applicable to the embodiments of the heating furnace 500. Therefore, some descriptions in the embodiments of the heating furnace 500 can be referred to the content in the method embodiments. For the sake of brevity, this application will not elaborate further.

[0343] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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. A heating method, characterized in that, The heating method is applicable to a heating furnace, the heating furnace including a heating cavity and a first conveying mechanism disposed in the heating cavity, the heating cavity being used to heat the object during its movement, and the heating method including: When the object to be heated is moved to the target point of the heating cavity by the first conveying mechanism, the temperature of the object to be heated and the sub-target temperature of the object to be heated at the target point are obtained. At least one target point is provided between the two ends of the heating cavity along the moving direction of the object to be heated. The at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object to be heated. The parameters of the heating furnace are adjusted according to the temperature of the object being heated and the sub-target temperature corresponding to the target point. The parameters of the heating furnace include at least one of the following: the temperature of the heating cavity and the transmission speed of the first conveying mechanism.

2. The method according to claim 1, characterized in that, The at least one target point includes one target point, and the sub-target temperature of the one target point is less than the target heating temperature; or, the at least one target point includes multiple target points, and the target point closer to the outlet of the heating cavity has a larger sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

3. The method according to claim 2, characterized in that, Before the heated object moves along with the first conveyor mechanism, the method includes: Obtain target heating parameters, including the target heating temperature of the object being heated, the target heating time for the object to reach the target heating temperature, and the dimension of the heating cavity along the moving direction of the object being heated; Based on the target heating time and the dimension of the heating cavity along the direction of movement of the heated object, the initial transmission speed of the first conveying mechanism is set; and, The initial temperature of the heating furnace is set according to the target heating temperature.

4. The method according to claim 3, characterized in that, The step of setting the initial transmission speed of the first conveying mechanism based on the target heating time and the dimension of the heating cavity along the moving direction of the heated object includes: The initial transmission speed V is set to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, t is the target heating time, and t1 is the preset time.

5. The method according to claim 3 or 4, characterized in that, The step of setting the initial transmission speed of the first conveying mechanism based on the target heating time and the dimension of the heating cavity along the moving direction of the heated object includes: The initial rotational speed N of the roller of the first conveying mechanism is set to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, R is the radius of the roller of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

6. The method according to any one of claims 3 to 5, characterized in that, The heating chamber includes a first chamber and a second chamber, the second chamber being located downstream of the first chamber. Setting the initial temperature of the heating furnace according to the target heating temperature includes: Set the initial temperature T of the first cavity 初始1 Satisfy: (T+5)℃≤T 初始1 ≤(T+15)℃; and, Set the initial temperature T of the second cavity 初始2 Satisfy: T≤T 初始2 ≤(T+8)℃, Wherein, T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

7. The method according to claim 6, characterized in that, The sub-target temperatures corresponding to the plurality of target points are 0.5T to T. The plurality of target points are set at a distance of 1 / 3L1 to (L1+3 / 4L2) from the inlet of the heating cavity, where L1 is the dimension of the first cavity along the moving direction of the heated object and L2 is the dimension of the second cavity along the moving direction of the heated object.

8. The method according to claim 7, characterized in that, The first sub-target temperature corresponding to the first target point of the heating object is 0.85T to 0.95T. The first target point is set at 1 / 2L1 to 5 / 6L1 away from the inlet of the heating cavity. The plurality of target points include the first target point.

9. The method according to claim 8, characterized in that, The second sub-target temperature of the object to be heated at the second target point is 0.90T to 0.98T. The second target point is located at L1 from the inlet of the heating cavity. The plurality of target points include the second target point, which is located downstream of the first target point.

10. The method according to claim 9, characterized in that, The third sub-target temperature of the object being heated at the third target point is 0.95T to T. The third target point is located at (L1+1 / 3L2) to (L1+2 / 3L2) from the inlet of the heating cavity. The plurality of target points include the third target point, which is located downstream of the second target point.

11. The method according to any one of claims 8 to 10, characterized in that, The step of controlling the adjustment of the parameters of the heating furnace based on the temperature of the object being heated and the sub-target temperature corresponding to the target point of the object being heated includes: If the first temperature of the object being heated when it moves to the first target point is not equal to the temperature of the first sub-target, and the difference is within a preset range, the transmission speed of the first conveying mechanism is adjusted; or, If the first temperature and the first sub-target temperature are not equal and the difference is outside a preset range, adjust the temperature of the first cavity; or... When the first temperature is equal to the first sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the first cavity are not adjusted.

12. The method according to claim 11, characterized in that, When the difference between the first temperature and the first sub-target temperature when the heated object moves to the first target point is within a preset range, adjusting the transmission speed of the first conveying mechanism includes: At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: 0 < T 11 -T 21 If T1 is less than or equal to 1, increase the transmission speed of the first transmission mechanism; or, At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: -T1 < T 11 -T 21 If the value is less than 0, reduce the transmission speed of the first transmission mechanism.

13. The method according to claim 11 or 12, characterized in that, Adjusting the temperature of the first cavity when the difference between the first temperature and the first sub-target temperature is outside a preset range includes: At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: T 11 -T 21 If the temperature is greater than T1, lower the temperature of the first cavity; or, At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the first cavity is increased.

14. The method according to claim 9 or 10, characterized in that, The step of controlling the adjustment of the parameters of the heating furnace based on the temperature of the object being heated and the sub-target temperature corresponding to the target point of the object being heated includes: If the second temperature of the heated object when it moves to the second target point is greater than the second sub-target temperature of the heated object at the second target point, the transmission speed of the first conveying mechanism is increased; or, If the second temperature is lower than the second sub-target temperature, reduce the transmission speed of the first transmission mechanism; or, When the second temperature is equal to the second sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the second cavity are not adjusted.

15. The method according to claim 10, characterized in that, The step of controlling the adjustment of the parameters of the heating furnace based on the temperature of the object being heated and the sub-target temperature corresponding to the target point of the object being heated includes: If the third temperature of the heated object when it moves to the third target point is greater than the third sub-target temperature of the heated object at the third target point, the temperature of the second cavity is reduced; or... If the third temperature is lower than the third sub-target temperature, reduce the transmission speed of the transmission mechanism; or, When the third temperature is equal to the third sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the second cavity are not adjusted.

16. The method according to any one of claims 3 to 15, characterized in that, The heating furnace further includes a heat-insulating cavity located downstream of the heating cavity. Setting the initial temperature of the heating furnace according to the target heating temperature includes: The initial temperature of the insulation cavity is set to T.

17. The method according to claim 16, characterized in that, The method further includes: When the object to be heated moves to the end point of the heating cavity and the temperature of the object to be heated meets the target heating temperature, the object to be heated is controlled to move to the heat preservation cavity for heat preservation.

18. The method according to claim 17, characterized in that, Before controlling the object to be heated to move into the heat-insulating cavity for heat preservation, the heating method further includes: Determine the target position of the heated object in the heating cavity when the heated object reaches the target heating temperature, and the target transmission speed when the first conveying mechanism conveys the heated object after the target position; Obtain the dimensions of the heat-insulating cavity along the moving direction of the heated object and the target heat-insulating time of the heated object; Based on the target position, target speed, the size of the heat preservation cavity along the moving direction of the heated object, and the target heat preservation time, the transmission speed of the second conveying mechanism is set. The second conveying mechanism is disposed in the heat preservation cavity and is located downstream of the first conveying mechanism.

19. The method according to any one of claims 1 to 18, characterized in that, The object being heated includes a single battery cell.

20. A heating furnace, characterized in that, The heating furnace includes: A heating cavity is used to heat the object during its movement. At least one target point is provided between the two ends of the heating cavity along the direction of movement of the object. The at least one target point includes a target point whose sub-target temperature is lower than the target heating temperature of the object. A first conveying mechanism is disposed in the heating cavity and is used to move the object being heated within the heating cavity; A heating object temperature monitoring module is used to monitor the temperature of the heating object; The control module is used to control the adjustment of the parameters of the heating furnace based on the temperature of the heating object at the target point and the sub-target temperature of the heating object at the target point monitored by the heating object temperature monitoring module. The parameters of the heating furnace include at least one of the following: the temperature of the heating cavity and the transmission speed of the first conveying mechanism.

21. The heating furnace according to claim 20, characterized in that, The at least one target point includes one target point, and the sub-target temperature of the one target point is less than the target heating temperature; or, the at least one target point includes multiple target points, and the target point closer to the outlet of the heating cavity has a larger sub-target temperature, and the largest sub-target temperature is less than or equal to the target heating temperature.

22. The heating furnace according to claim 20 or 21, characterized in that, The heating furnace also includes: A carrying mechanism for supporting the object being heated.

23. The heating furnace according to claim 22, characterized in that, The temperature monitoring module for the heated object is mounted on the loading mechanism.

24. The heating furnace according to any one of claims 20 to 23, characterized in that, One end of the heating object temperature monitoring module is connected to the heating object and is used to monitor the temperature of the heating object.

25. The heating furnace according to any one of claims 20 to 24, characterized in that, The other end of the heating object temperature monitoring module is connected to the control module so that the control module can obtain the temperature of the heating object monitored by the heating object temperature monitoring module.

26. The heating furnace according to claim 21, characterized in that, The control module, Used to obtain target heating parameters, the target heating parameters including the target heating temperature of the object being heated, the target heating time for the object to reach the target heating temperature, and the dimension of the heating cavity along the moving direction of the object being heated; Based on the target heating time and the dimension of the heating cavity along the direction of movement of the heated object, the initial transmission speed of the first conveying mechanism is set; and, The initial temperature of the heating furnace is set according to the target heating temperature.

27. The heating furnace according to claim 26, characterized in that, The control module is used to set the initial transmission speed V to satisfy: V>L / t1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, t is the target heating time, and t1 is the preset time.

28. The heating furnace according to claim 26 or 27, characterized in that, The control module is used to set the initial rotational speed N of the roller of the first conveying mechanism to satisfy: (1+5%)L / 2πRt1≤N≤(1+35%)L / 2πRt1, where t≤t1, L is the dimension of the heating cavity along the moving direction of the heated object, R is the radius of the roller of the first conveying mechanism, t is the target heating time, and t1 is the preset time.

29. The heating furnace according to any one of claims 26 to 28, characterized in that, The heating chamber includes a first chamber and a second chamber, with the second chamber located downstream of the first chamber. The control module is used to set the initial temperature T of the first cavity. 初始1 Satisfy: (T+5)℃≤T 初始1 ≤(T+15)℃; and, Set the initial temperature T of the second cavity 初始2 Satisfy: T≤T 初始2 ≤(T+8)℃, Wherein, T is the target heating temperature, and the initial temperature of the second cavity is greater than the initial temperature of the first cavity.

30. The heating furnace according to claim 29, characterized in that, The sub-target temperatures corresponding to the plurality of target points are 0.5T to T. The plurality of target points are set at a distance of 1 / 3L1 to (L1+3 / 4L2) from the inlet of the heating cavity, where L1 is the dimension of the first cavity along the moving direction of the heated object and L2 is the dimension of the second cavity along the moving direction of the heated object.

31. The heating furnace according to claim 30, characterized in that, The plurality of target points include a first target point, and the first sub-target temperature of the heated object at the first target point is 0.85T to 0.95T. The first target point is located at 1 / 2L1 to 5 / 6L1 away from the inlet of the heating cavity.

32. The heating furnace according to claim 31, characterized in that, The plurality of target points include a second target point, which is located downstream of the first target point. The second sub-target temperature of the heated object at the second target point is 0.90T to 0.98T. The second target point is located at L1 from the inlet of the heating cavity.

33. The heating furnace according to claim 32, characterized in that, The plurality of target points includes a third target point, which is located downstream of the second target point. The third sub-target temperature of the heated object at the third target point is 0.95T to T. The third target point is located at a distance of (L1+1 / 3L2) to (L1+2 / 3L2) from the inlet of the heating cavity.

34. The heating furnace according to any one of claims 31 to 33, characterized in that, The control module is configured to adjust the transmission speed of the first conveying mechanism when the first temperature of the heated object at the first target point is not equal to the temperature of the first sub-target, and the difference is within a preset range; or, If the first temperature and the first sub-target temperature are not equal and the difference is outside the preset range, adjust the temperature of the first cavity; or, When the first temperature is equal to the first sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the first cavity are not adjusted.

35. The heating furnace according to claim 34, characterized in that, The control module is used to control the temperature at the first temperature T. 11 With the first sub-target temperature T 21 The difference satisfies: 0 < T 11 -T 21 If T1 is less than or equal to 1, increase the transmission speed of the first transmission mechanism; or, At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: -T1 < T 11 -T 21 If the value is less than 0, reduce the transmission speed of the first transmission mechanism.

36. The heating furnace according to claim 34 or 35, characterized in that, The control module is used to control the temperature at the first temperature T. 11 With the first sub-target temperature T 21 The difference satisfies: T 11 -T 21 If the temperature is greater than T1, lower the temperature of the first cavity; or, At the first temperature T 11 With the first sub-target temperature T 21 The difference satisfies: -T1 < T 11 -T 21 In this case, the temperature of the first cavity is increased.

37. The heating furnace according to claim 32 or 33, characterized in that, The control module is configured to increase the transmission speed of the first conveying mechanism when the second temperature of the heated object when it moves to the second target point is greater than the second sub-target temperature of the heated object at the second target point; or, If the second temperature is lower than the second sub-target temperature, reduce the transmission speed of the first transmission mechanism; or, When the second temperature is equal to the second sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the second cavity are not adjusted.

38. The heating furnace according to claim 33, characterized in that, The control module is configured to reduce the temperature of the second cavity if the third temperature of the heated object when it moves to the third target point is greater than the third sub-target temperature of the heated object at the third target point; or... If the third temperature is lower than the third sub-target temperature, reduce the transmission speed of the first transmission mechanism; or, When the third temperature is equal to the third sub-target temperature, the transmission speed of the first transmission mechanism and the temperature of the second cavity are not adjusted.

39. The heating furnace according to any one of claims 26 to 38, characterized in that, The heating furnace also includes a heat-insulating cavity, which is located downstream of the heating cavity. The control module is used to set the initial temperature of the insulation cavity to T.

40. The heating furnace according to claim 39, characterized in that, The control module is used to control the heated object to move to the heat preservation cavity for heat preservation when the heated object moves to the end point of the heating cavity and the temperature of the heated object meets the target heating temperature.

41. The heating furnace according to claim 40, characterized in that, The heating furnace further includes a second conveying mechanism, which is disposed in the heat-insulating cavity and located downstream of the first conveying mechanism. The control module is used to determine the target position of the heated object in the heating cavity when the heated object reaches the target heating temperature, and the target transmission speed when the first conveying mechanism conveys the heated object after the target position. Used to determine the dimensions of the heat-insulating cavity along the direction of movement of the heated object and the target heat-insulating time of the heated object; as well as The transmission speed of the second conveying mechanism is set according to the target position, target speed, the size of the heat preservation cavity along the moving direction of the heated object, and the target heat preservation time.

42. The heating furnace according to any one of claims 20 to 41, characterized in that, The object being heated includes a single battery cell.

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