CN113433986B

CN113433986B - Temperature control method, oven, electronic device and readable storage medium

Info

Publication number: CN113433986B
Application number: CN202110733484.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Guangdong Lyric Robot Intelligent Automation Co Ltd
Current assignee: Guangdong Lyric Robot Automation Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-10-25
Anticipated expiration: 2041-06-30
Also published as: CN113433986A

Abstract

The application provides a temperature control method, an oven, an electronic device and a readable storage medium. The temperature control method comprises the following steps: comparing the actual temperature value of the pole piece coating surface with a preset calibration temperature of the battery pole piece coating surface to obtain a first temperature difference value; obtaining the calibration temperature of the upper air cavity according to the first temperature difference value and a preset first conversion rule; comparing the actual temperature of the upper air cavity with the calibrated temperature of the upper air cavity to obtain a second temperature difference value; obtaining the calibration temperature of the static pressure cavity according to the second temperature difference value and a preset second conversion rule; comparing the actual temperature of the static pressure cavity with the calibrated temperature of the static pressure cavity to obtain a third temperature difference value; and adjusting the heating flow of the heater to ensure that the temperature adjustment increment of the static pressure cavity is equal to the third temperature difference value. Through the technical scheme of this application, can adjust the stoving temperature on battery pole piece surface in real time to improve the homogeneity that the pole piece was heated at the stoving in-process.

Description

Temperature control method, oven, electronic device and readable storage medium

Technical Field

The application relates to the technical field of battery pole piece manufacturing, in particular to a temperature control method, an oven, electronic equipment and a readable storage medium.

Background

In the battery pole piece manufacturing process, need the wet thick liquids of coating on the coating face of battery pole piece, dry battery pole piece after the coating is accomplished, among the correlation technique, in battery pole piece drying device, owing to fail to carry out real-time thermal loss control when the pole piece is dried, lead to the pole piece because of heat transfer's is inhomogeneous in the drying process, lead to the pole piece to be heated inhomogeneously, defects such as chap, pole piece turn-up or local drying excess can appear in the drying process.

Disclosure of Invention

The embodiment of the application aims to provide a temperature control method, which can adjust the drying temperature of the surface of a battery pole piece in real time, improve the uniformity of the pole piece heated in the drying process, and effectively avoid the occurrence of defects such as cracking, pole piece curling or excessive local drying.

The embodiment of the first aspect of the application provides a temperature control method, which is used for an oven for coating a battery pole piece, wherein the oven comprises an upper air cavity, a lower air cavity, a static pressure cavity and a heater connected with the static pressure cavity, the static pressure cavity is communicated with the upper air cavity through a first valve and communicated with the lower air cavity through a second valve, a channel for conveying the battery pole piece is arranged between the upper air cavity and the lower air cavity, and the temperature control method comprises the following steps:

the method comprises the steps of obtaining the actual temperature of a coating surface of a battery pole piece, and comparing the actual temperature value of the coating surface of the pole piece with the preset calibration temperature of the coating surface of the battery pole piece to obtain a first temperature difference value.

Specifically, the actual temperature of the coating surface of the battery pole piece can be acquired in real time through a temperature detection device such as a temperature sensor arranged on the coating surface of the battery pole piece, and then the actual temperature of the coating surface of the battery pole piece is compared with the calibration temperature of the coating surface of the battery pole piece, so that a first temperature difference value between the actual temperature of the coating surface of the battery pole piece and the preset calibration temperature is obtained.

And obtaining the calibration temperature of the upper air cavity according to the first temperature difference value and a preset first conversion rule.

Because the temperature transmission between the battery pole piece coating surface and the static pressure cavity is indirect transmission and needs to pass through the upper air cavity, and the temperature of the battery pole piece coating surface and the temperature of the static pressure cavity have errors in the conversion process, when a first temperature difference value of the battery pole piece coating surface is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to a control system, a corresponding relation between a temperature value and a voltage value is set in the control system, if 1 degree corresponds to 0.1V voltage, the control system transmits the voltage signal corresponding to the first temperature difference value to the upper air cavity, and converts the corresponding voltage signal into a corresponding temperature value according to a preset conversion rule, if 0.5V corresponds to 5 degrees, and the sum of the temperature value and the actual temperature of the upper air cavity is the calibration temperature of the upper air cavity.

And acquiring the actual temperature of the upper air cavity, and comparing the actual temperature of the upper air cavity with the calibration temperature of the upper air cavity to obtain a second temperature difference value.

Specifically, the actual temperature of the upper air cavity can be obtained by arranging a temperature detection device such as a temperature sensor in the upper air cavity, and the actual temperature in the upper air cavity is compared with the obtained calibration temperature of the upper air cavity to obtain a second temperature difference value between the actual temperature of the upper air cavity and the calibration temperature of the upper air cavity.

And obtaining the calibration temperature of the static pressure cavity according to the second temperature difference value and a preset second conversion rule.

Specifically, when a second temperature difference value between the actual temperature of the upper air cavity and the calibration temperature is obtained, a temperature difference signal corresponding to the second temperature difference value can be transmitted to the control system, a corresponding relation between the temperature value and the voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 degree, the control system transmits a voltage signal corresponding to the second temperature difference value to the static pressure cavity, and converts the corresponding voltage signal into a temperature value corresponding to the static pressure cavity according to a preset second conversion rule, for example, 5 degrees corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the static pressure cavity is the calibration temperature of the static pressure cavity, so that the accuracy of the calculation of the calibration temperature of the static pressure cavity is improved.

And acquiring the actual temperature of the static pressure cavity, and comparing the actual temperature of the static pressure cavity with the calibration temperature of the static pressure cavity to obtain a third temperature difference value.

Specifically, a temperature detection device such as a temperature sensor can be arranged in the static pressure cavity, and the actual temperature in the static pressure cavity is compared with the obtained calibration temperature to obtain a third temperature difference value between the actual temperature of the static pressure cavity and the calibration temperature of the static pressure cavity.

And adjusting the heating flow of the heater to enable the temperature adjustment increment of the static pressure cavity to be equal to the third temperature difference value so as to adjust the actual temperature of the upper air cavity to be equal to the calibration temperature of the upper air cavity.

Because the heater is connected with the static pressure cavity, and the static pressure cavity is communicated with the upper air cavity, the temperature in the static pressure cavity can be adjusted by adjusting the heating flow of the heater, and when the temperature adjustment increment of the static pressure cavity is the same as the third temperature difference value, the actual temperature of the upper air cavity can be equal to the calibration temperature, so that the temperature of the pole piece coating surface can be always kept at the calibration temperature in the pole piece baking process, the uniformity of heating the surface of the pole piece is ensured, the situations of cracking, pole piece curling or excessive local drying and the like in the pole piece drying process are effectively avoided, and the yield of manufacturing the battery pole piece is improved.

In a possible implementation manner, the obtaining a preset calibration temperature of the windward cavity according to the first temperature difference value and a preset first conversion rule includes:

and obtaining the calibration temperature between the air nozzles of the upper air cavity according to the first temperature difference value and a preset first conversion rule.

Because the temperature transmission between the battery pole piece coating surface and the upper air cavity body is indirect transmission and needs to pass through an upper air cavity air nozzle between the upper air cavity body and the battery pole piece, and the temperature of the battery pole piece coating surface and the temperature of the upper air cavity body have errors in the conversion process, when a first temperature difference value of the battery pole piece coating surface is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to a control system, the control system is provided with a corresponding relation between a temperature value and a voltage value, for example, 1 degree corresponds to 0.1V voltage, the control system transmits a voltage signal corresponding to the first temperature difference value to the upper air cavity air nozzle, and converts the corresponding voltage signal into a temperature value corresponding to the voltage signal according to a preset conversion rule, for example, 0.5V corresponds to 5 degrees, and the sum of the temperature value and the actual temperature between the upper air cavity air nozzles is the calibration temperature between the upper air cavity air nozzles.

And acquiring the actual temperature between the air nozzles of the upper air cavity, and comparing the actual temperature between the air nozzles of the upper air cavity with the calibrated temperature between the air nozzles of the upper air cavity to obtain a fourth temperature difference value.

Specifically, the actual temperature of the upper air cavity can be obtained by arranging a temperature detection device such as a temperature sensor between the air nozzles of the upper air cavity, and the actual temperature between the air nozzles of the upper air cavity is compared with the obtained calibration temperature of the air nozzles of the upper air cavity, so that a fourth temperature difference value between the actual temperature of the air nozzles of the upper air cavity and the calibration temperature of the air nozzles of the upper air cavity is obtained.

And obtaining the preset calibration temperature of the upper air cavity according to the fourth temperature difference value and a preset third conversion rule.

Specifically, when a fourth temperature difference value between the actual temperature of the tuyere of the upper air cavity and the calibration temperature of the tuyere of the upper air cavity is obtained, a temperature difference signal corresponding to the fourth temperature difference value can be transmitted to the control system, a corresponding relation between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 degree, the control system transmits a voltage signal corresponding to the fourth temperature difference value to the cavity of the upper air cavity, and converts a corresponding voltage signal into a temperature value corresponding to the voltage signal according to a preset third conversion rule, for example, 5 degrees corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the cavity of the upper air cavity is the calibration temperature of the cavity of the upper air cavity, so that the accuracy of the calibration temperature calculation of the cavity of the upper air cavity is improved.

In one possible implementation manner, the method further includes: and obtaining the calibration temperature of the lower air cavity according to the calibration temperature of the upper air cavity and the preset temperature ratio between the upper air cavity and the lower air cavity.

Because the preset temperature ratio between the upper wind cavity body and the lower wind cavity body is a known value, the calibration temperature of the lower wind cavity body can be obtained under the condition that the calibration temperature of the upper wind cavity body exists.

And acquiring the actual temperature of the lower air cavity body to obtain the actual temperature ratio of the upper air cavity body to the lower air cavity body.

Specifically, after a temperature detection device such as a temperature sensor is arranged in the lower air cavity, the actual temperature of the lower air cavity can be obtained, and the ratio of the actual temperature of the lower air cavity to the calibration temperature of the upper air cavity is the actual temperature ratio of the upper air cavity to the lower air cavity.

And judging whether the actual temperature ratio of the upper air cavity body to the lower air cavity body is constant with a preset temperature ratio.

Whether the actual temperature ratio of the upper air cavity body to the lower air cavity body is constant or not and the preset temperature ratio are judged, so that whether the temperature of the lower air cavity body needs to be adjusted or not can be determined, and the temperature ratio of the lower air cavity body to the upper air cavity body is always equal to the preset temperature ratio.

If the temperature of the upper air cavity and the lower air cavity is not constant, the flow of the heater is adjusted, the valve opening degrees of the first valve and the second valve are adjusted, so that the actual temperature ratio of the upper air cavity and the lower air cavity and the preset temperature ratio are kept constant, or the opening degree of the second valve is adjusted, so that the actual temperature ratio of the upper air cavity and the lower air cavity and the preset temperature ratio are kept constant.

If the actual temperature ratio of the lower air cavity body to the upper air cavity body is different from the preset temperature ratio, the temperature of the lower air cavity body needs to be adjusted, specifically, because the temperature of the upper air cavity body is adjusted to the preset calibration temperature, the heating flow of the heater can be adjusted at the moment, and the valve opening degree of the first valve and the valve opening degree of the second valve are adjusted, so that when the temperature of the static pressure cavity is adjusted, the temperature of the upper air cavity body is always kept at the preset calibration temperature, meanwhile, the temperature of the lower air cavity body is adjusted, and the actual temperature ratio of the upper air cavity body to the lower air cavity body is kept constant with the preset temperature ratio, so that the uniformity of heating of the coating surface and the bottom surface of the battery pole piece is ensured, and the occurrence of cracking, curling or excessive drying of the battery pole piece in the drying process is further avoided. Or, under the condition that the temperature of the static pressure cavity is high enough, the temperature of the lower air cavity can be adjusted by directly adjusting the valve opening of the second valve between the static pressure cavity and the lower air cavity, and the temperature of the upper air cavity is kept unchanged, so that the actual temperature ratio of the lower air cavity to the lower air cavity is kept constant with the preset temperature ratio.

And if the constant value is obtained, keeping the valve opening degrees of the first valve and the second valve.

If the actual temperature ratio of the lower air cavity body to the upper air cavity body is the same as the preset temperature ratio, the temperature of the lower air cavity does not need to be adjusted, the temperature of the static pressure cavity is kept, and the valve opening degrees of the first valve and the second valve are kept.

The embodiment of the second aspect of the application provides a temperature control method, which is used for an oven for coating a battery pole piece, wherein the oven comprises an upper air cavity, a lower air cavity, a static pressure cavity and a heater connected with the static pressure cavity, the static pressure cavity is communicated with the upper air cavity through a first valve and communicated with the lower air cavity through a second valve, a channel for conveying the battery pole piece is arranged between the upper air cavity and the lower air cavity, and the temperature control method comprises the following steps: the method comprises the steps of obtaining the actual temperature of a coating surface of the battery pole piece, and comparing the actual temperature value of the coating surface of the pole piece with the preset calibration temperature of the coating surface of the battery pole piece to obtain a first temperature difference value.

Specifically, a temperature detection device such as a temperature sensor is arranged on the coating surface of the battery pole piece to acquire the actual temperature of the coating surface of the battery pole piece in real time, and then the actual temperature of the coating surface of the battery pole piece is compared with the calibration temperature of the coating surface of the battery pole piece to obtain a first temperature difference value between the actual temperature of the coating surface of the battery pole piece and the preset calibration temperature.

Because the temperature transmission between the coating surface of the battery pole piece and the upper air cavity body is indirect transmission and needs to pass through the upper air cavity air nozzle between the upper air cavity body and the battery pole piece, and the temperature of the coating surface of the battery pole piece and the temperature of the upper air cavity body have errors in the conversion process, when the fifth temperature difference value of the coating surface of the battery pole piece is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to a control system, the control system is provided with a corresponding relation between a temperature value and a voltage value, for example, 1 degree corresponds to 0.1V voltage, the control system transmits a voltage signal corresponding to the first temperature difference value to the upper air cavity air nozzle, and converts the corresponding voltage signal into a temperature value corresponding to the temperature value according to a preset conversion rule, for example, 0.5V corresponds to 5 degrees, and the sum of the temperature value and the actual temperature between the upper air cavity air nozzles is the calibration temperature between the upper air cavity air nozzles.

And obtaining the calibration temperature of the upper air cavity according to the fourth temperature difference value and a preset third conversion rule.

And acquiring the actual temperature of the upper air cavity, and comparing the actual temperature of the upper air cavity with the calibrated temperature of the upper air cavity to obtain a second temperature difference value.

Specifically, the actual temperature of the upper air cavity can be obtained by arranging a temperature detection device such as a temperature sensor in the upper air cavity, and the actual temperature in the upper air cavity is compared with the obtained calibration temperature of the upper air cavity, so that a second temperature difference value between the actual temperature of the upper air cavity and the calibration temperature is obtained.

And adjusting the valve opening of the first valve to enable the temperature adjustment increment of the upper air cavity to be equal to the second temperature difference value.

Because the static pressure cavity is communicated with the upper air cavity through the first valve, the temperature in the upper air cavity can be adjusted by adjusting the opening degree of the first valve, and the temperature adjustment increment of the upper air cavity is equal to the second temperature difference value through the preset relationship between the valve opening degree and the heat control, so that the heat loss of the upper air cavity is compensated, and the heating uniformity of the temperature of the coating surface of the battery pole piece is ensured.

Specifically, after temperature detection devices such as a temperature sensor are arranged in the lower air cavity, the actual temperature of the lower air cavity can be obtained, and the ratio of the actual temperature of the lower air cavity to the calibration temperature of the upper air cavity is the actual temperature ratio of the upper air cavity to the lower air cavity.

Whether the actual temperature ratio of the upper air cavity body to the lower air cavity body is constant or not and the preset temperature ratio are judged, so that whether the temperature of the lower air cavity body needs to be adjusted or not can be determined, and the temperature ratio of the lower air cavity body to the upper air cavity body is equal to the preset temperature ratio all the time.

If the actual temperature ratio of the lower air cavity body to the upper air cavity body is different from the preset temperature ratio, the temperature of the lower air cavity body needs to be adjusted, specifically, because the temperature of the upper air cavity body is already adjusted to the preset calibration temperature, the heating flow of the heater can be adjusted at the moment, and the valve openings of the first valve and the second valve are adjusted, so that when the temperature of the static pressure cavity is adjusted, the temperature of the upper air cavity body is always kept at the preset calibration temperature, meanwhile, the temperature of the lower air cavity body is adjusted, and the actual temperature ratio of the upper air cavity body to the lower air cavity body is kept constant with the preset temperature ratio, so that the uniformity of heating of the coating surface and the bottom surface of the battery pole piece is ensured, and the occurrence of cracking, curling or excessive drying of the battery pole piece in the drying process is further avoided. Or, under the condition that the temperature of the static pressure cavity is high enough, the temperature of the lower air cavity can be adjusted by directly adjusting the valve opening of the second valve between the static pressure cavity and the lower air cavity, and the temperature of the upper air cavity is kept unchanged, so that the actual temperature ratio of the lower air cavity to the lower air cavity is kept constant with the preset temperature ratio.

And if the valve opening degree is constant, the valve opening degrees of the first valve and the second valve are kept.

Embodiments of a third aspect of the present application provide an oven, including: an upper air cavity; the lower air cavity is symmetrically arranged below the upper air cavity, and a battery pole piece is arranged between the upper air cavity and the lower air cavity; the static pressure cavity is communicated with the upper air cavity through a first valve and is communicated with the lower air cavity through a second valve; the heater is communicated with the static pressure cavity and used for supplying heat to the static pressure cavity; the first temperature sensor is arranged on the coating surface of the battery pole piece and used for detecting the actual temperature of the coating surface of the battery pole piece; the second temperature sensor is arranged in the static pressure cavity and used for detecting the actual temperature in the static pressure cavity; the third temperature sensor is arranged between the air nozzles of the upper air cavity and used for detecting the actual temperature between the air nozzles of the upper air cavity; the fourth temperature sensor is arranged in the upper air cavity body and used for detecting the actual temperature in the upper air cavity body; the temperature conversion module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor and is used for obtaining the calibration temperature of the upper air cavity according to a first temperature difference between the actual temperature of the coating surface of the battery pole piece and the preset calibration temperature of the coating surface of the battery pole piece and a preset first conversion rule; comparing the actual temperature of the upper air cavity with the calibrated temperature of the upper air cavity to obtain a second temperature difference value; obtaining the calibration temperature of the static pressure cavity according to the second temperature difference value and a preset second conversion rule; comparing the actual temperature of the static pressure cavity with the calibrated temperature of the static pressure cavity to obtain a second temperature difference value; and the temperature controller comprises a first control module electrically connected with the temperature conversion module and the heater, and the first control module is suitable for adjusting the heating flow of the heater according to the second temperature difference value, so that the temperature adjustment increment of the static pressure cavity to the upper air cavity is equal to the second temperature difference value, and the actual temperature of the upper air cavity is adjusted to be equal to the calibrated temperature of the upper air cavity.

An embodiment of a fourth aspect of the present application provides an electronic device, including: a processor and a memory storing computer readable instructions that, when executed by the processor, perform the method of any of the embodiments of the first and second aspects

In a fifth aspect, the present application provides a readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, performs the method according to any one of the first and second aspects.

According to the temperature control method provided by the embodiment of the application, the actual temperature of the coating surface of the battery pole piece is obtained in real time, the preset calibration temperature is combined, the first temperature difference value between the actual temperature of the coating surface of the battery pole piece and the calibration temperature can be obtained, the calibration temperature of the static pressure cavity can be obtained through the preset conversion rule, then the actual temperature of the static pressure cavity is obtained, the temperature increment required by the static pressure cavity can be determined, and the temperature increment of the static pressure cavity is adjusted to enable the actual temperature of the coating surface of the battery pole piece to be equal to the calibration temperature, so that the drying temperature of the coating surface of the battery pole piece can be adjusted in real time, the heating uniformity of the pole piece in the drying process is improved, and the defects of cracking, pole piece curling or local drying excess and the like of the battery pole piece are effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a flowchart of a temperature control method according to an embodiment of the present disclosure;

FIG. 2 is a flow chart of another temperature control method provided by an embodiment of the present application;

FIG. 3 is a schematic cross-sectional structural diagram of an oven provided in an embodiment of the present application from one perspective;

FIG. 4 is a cross-sectional structural schematic view of another perspective of an oven provided by an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Icon: 10. baking oven; 101. an upper air cavity; 102. a battery pole piece; 103. a lower air cavity; 104. a first temperature sensor; 105. a third temperature sensor; 106. an upper plenum tuyere; 107. a fourth temperature sensor; 108. a static pressure chamber; 1081. a first valve; 1082. a second temperature sensor; 200. an electronic device; 201. a processor; 202. a memory.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.

As shown in fig. 1, a temperature control method provided in an embodiment of the first aspect of the present application is used in an oven 10 for coating a battery pole piece 102, where the oven 10 includes an upwind cavity 101, a downwind cavity 103, a static pressure cavity 108, and a heater connected to the static pressure cavity 108, the static pressure cavity 108 is communicated with the upwind cavity 101 through a first valve 1081, and is communicated with the downwind cavity 103 through a second valve, and a channel for conveying the battery pole piece 102 is provided between the upwind cavity 101 and the downwind cavity 103, and the temperature control method includes:

step S100: the actual temperature of the coating surface of the battery pole piece 102 is obtained, and the actual temperature value of the coating surface of the pole piece is compared with a preset calibration temperature of the coating surface of the battery pole piece 102 to obtain a first temperature difference value.

Specifically, the actual temperature of the coating surface of the battery pole piece 102 can be acquired in real time by a temperature detection device such as a temperature sensor arranged on the coating surface of the battery pole piece 102, and then the actual temperature of the coating surface of the battery pole piece 102 is compared with the calibration temperature of the actual temperature to obtain a first temperature difference value between the actual temperature of the coating surface of the battery pole piece 102 and the preset calibration temperature.

Step S102: and obtaining the calibration temperature of the upwind cavity 101 according to the first temperature difference value and a preset first conversion rule.

Since the temperature transmission between the coating surface of the battery pole piece 102 and the static pressure cavity 108 is indirect transmission, and needs to pass through the upwind cavity 101, and the temperature of the coating surface of the battery pole piece 102 and the temperature of the static pressure cavity 108 have errors in the conversion process, when a first temperature difference value of the coating surface of the battery pole piece 102 is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to the control system, a corresponding relation between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 degree, the control system transmits the voltage signal corresponding to the first temperature difference value to the upwind cavity 101, and converts the corresponding voltage signal into a temperature value corresponding to the voltage signal according to a preset conversion rule, for example, 5 degrees corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the upwind cavity 101 is the calibration temperature of the upwind cavity 101.

Step S104: and acquiring the actual temperature of the upwind cavity 101, and comparing the actual temperature of the upwind cavity 101 with the calibration temperature of the upwind cavity 101 to obtain a second temperature difference value.

Specifically, the actual temperature of the windward cavity 101 can be obtained by arranging a temperature detection device such as a temperature sensor in the windward cavity 101, and the actual temperature in the windward cavity 101 is compared with the obtained calibration temperature of the windward cavity 101, so as to obtain a second temperature difference value between the actual temperature of the windward cavity 101 and the calibration temperature thereof.

Step S106: and obtaining the calibration temperature of the static pressure cavity 108 according to the second temperature difference value and a preset second conversion rule.

Specifically, when a second temperature difference value between the actual temperature of the upper air cavity 101 and the calibration temperature is obtained, a temperature difference signal corresponding to the second temperature difference value may be transmitted to the control system, a corresponding relationship between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 °, the control system transmits a voltage signal corresponding to the second temperature difference value to the static pressure cavity 108, and converts the corresponding voltage signal into a corresponding temperature value according to a preset second conversion rule, for example, 5 ° corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the static pressure cavity 108 is the calibration temperature of the static pressure cavity 108, so that the accuracy of the calibration temperature calculation of the static pressure cavity 108 is improved.

Step S108: and acquiring the actual temperature of the hydrostatic cavity 108, and comparing the actual temperature of the hydrostatic cavity 108 with the calibrated temperature of the hydrostatic cavity 108 to obtain a third temperature difference value.

Specifically, a temperature detection device such as a temperature sensor may be disposed in the static pressure cavity 108, and the actual temperature in the static pressure cavity 108 is compared with the obtained calibration temperature to obtain a third temperature difference value between the actual temperature of the static pressure cavity 108 and the calibration temperature thereof.

Step S110: and adjusting the heating flow of the heater to enable the temperature adjustment increment of the static pressure cavity 108 to be equal to the third temperature difference value, so that the actual temperature of the upper air cavity 101 is adjusted to be equal to the calibration temperature of the upper air cavity 101.

Because the heater is connected with the static pressure cavity 108, and the static pressure cavity 108 is communicated with the upper air cavity 101, the temperature in the static pressure cavity 108 can be adjusted by adjusting the heating flow of the heater, and when the temperature adjustment increment of the static pressure cavity 108 is the same as the second temperature difference value, the actual temperature of the upper air cavity 101 can be equal to the calibration temperature, so that the temperature of the pole piece coating surface can be always kept at the calibration temperature in the pole piece baking process, the uniformity of heating the pole piece surface can be ensured, the situations of cracking, pole piece curling or excessive local drying and the like in the pole piece drying process can be effectively avoided, and the yield of manufacturing the battery pole piece 102 is improved.

In a possible implementation manner, according to the first temperature difference value and the preset first conversion rule, the preset calibration temperature of the windward cavity 101 is obtained, which includes:

and obtaining the calibration temperature between the blast nozzles 106 of the upper blast cavity according to the first temperature difference value and a preset first conversion rule.

Because the temperature transmission between the coating surface of the battery pole piece 102 and the upper air cavity 101 is indirect transmission, and needs to pass through the upper air cavity tuyere 106 between the upper air cavity 101 and the battery pole piece 102, and the temperature of the coating surface of the battery pole piece 102 and the temperature of the upper air cavity 101 have errors in the conversion process, when a first temperature difference value of the coating surface of the battery pole piece 102 is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to the control system, a corresponding relation between a temperature value and a voltage value is set in the control system, for example, a 0.1V voltage corresponds to 1 degree, the control system transmits the voltage signal corresponding to the first temperature difference value to the upper air cavity tuyere 106, and converts the corresponding voltage signal into a temperature value corresponding to the temperature value according to a preset conversion rule, for example, 5V corresponds to 0.5 degree, and the sum of the actual temperature between the temperature value and the upper air cavity tuyere 106 is the calibration temperature between the upper air tuyeres 106.

And acquiring the actual temperature between the upper air cavity nozzles 106, and comparing the actual temperature between the upper air cavity nozzles 106 with the calibrated temperature between the upper air cavity nozzles 106 to obtain a fourth temperature difference value.

Specifically, the actual temperature of the upper air cavity 101 may be obtained by arranging a temperature detection device such as a temperature sensor between the upper air cavity nozzles 106, and the actual temperature between the upper air cavity nozzles 106 is compared with the obtained calibration temperature of the upper air cavity nozzles 106, so as to obtain a fourth temperature difference value between the actual temperature of the upper air cavity nozzles 106 and the calibration temperature thereof.

And obtaining the preset calibration temperature of the upwind cavity 101 according to the fourth temperature difference value and a preset third conversion rule.

Specifically, when a fourth temperature difference value between the actual temperature of the upper air cavity tuyere 106 and the calibration temperature thereof is obtained, a temperature difference signal corresponding to the fourth temperature difference value may be transmitted to the control system, a corresponding relationship between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 °, the control system transmits a voltage signal corresponding to the fourth temperature difference value to the upper air cavity 101, and converts the corresponding voltage signal into a temperature value corresponding to the voltage signal according to a preset third conversion rule, for example, 5 ° corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the upper air cavity 101 is the calibration temperature of the upper air cavity 101, so that the accuracy of the calibration temperature calculation of the upper air cavity 101 is improved.

In one possible implementation manner, the method further includes: and obtaining the calibration temperature of the lower wind cavity 103 according to the calibration temperature of the upper wind cavity 101 and the preset temperature ratio between the upper wind cavity 101 and the lower wind cavity 103.

Since the preset temperature ratio between the upwind cavity 101 and the downwind cavity 103 is a known value, the calibration temperature of the downwind cavity 103 can be obtained under the condition that the calibration temperature of the upwind cavity 101 exists.

And acquiring the actual temperature of the lower air cavity 103 to obtain the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103.

Specifically, after temperature detection devices such as a temperature sensor are arranged in the lower air cavity 103, the actual temperature of the lower air cavity 103 can be obtained, and the ratio of the actual temperature of the lower air cavity 103 to the calibration temperature of the upper air cavity 101 is the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103.

And judging whether the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103 is constant with the preset temperature ratio.

Whether the actual temperature ratio of the upper air cavity body 101 to the lower air cavity body 103 is constant or not and the preset temperature ratio is judged, so that whether the temperature of the lower air cavity body 103 needs to be adjusted or not can be determined, and it is guaranteed that the temperature ratio of the lower air cavity body 103 to the upper air cavity body 101 is equal to the preset temperature ratio all the time.

If the temperature of the air in the upper air cavity 101 is not constant, the flow of the heater is adjusted, and the valve opening degrees of the first valve 1081 and the second valve are adjusted, so that the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103 is kept constant with the preset temperature ratio, or the opening degree of the second valve is adjusted, so that the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103 is kept constant with the preset temperature ratio.

If the actual temperature ratio of the lower air cavity 103 to the upper air cavity 101 is different from the preset temperature ratio, the temperature of the lower air cavity 103 needs to be adjusted, specifically, since the temperature of the upper air cavity 101 has been adjusted to the preset calibration temperature, the heating flow of the heater can be adjusted at this time, and the valve openings of the first valve 1081 and the second valve are adjusted, so as to ensure that the temperature of the upper air cavity 101 is always maintained at the preset calibration temperature, and ensure that the temperature of the lower air cavity 103 is adjusted, and the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103 and the preset temperature ratio are kept constant, thereby ensuring the uniformity of heating of the coating surface and the bottom surface of the battery pole piece 102, and further avoiding the occurrence of excessive drying crack, pole piece curling or drying crack in the drying process of the battery pole piece 102. Or, under the condition that the temperature of the static pressure cavity 108 is sufficiently high, the opening degree of the second valve between the static pressure cavity 108 and the lower air cavity 103 can be directly adjusted to adjust the temperature of the lower air cavity 103, and the temperature of the upper air cavity 101 is ensured to be kept unchanged, so that the actual temperature ratio of the lower air cavity 103 to the lower air cavity 103 is kept constant with the preset temperature ratio.

If constant, the valve opening of the first valve 1081 and the second valve are maintained.

If the actual temperature ratio of the lower air cavity 103 to the upper air cavity 101 is the same as the preset temperature ratio, the temperature of the lower air cavity does not need to be adjusted, the temperature of the static pressure cavity 108 is kept, and the valve opening degrees of the first valve 1081 and the second valve are kept.

As shown in fig. 2, an embodiment of the second aspect of the present application provides a temperature control method, which is used in an oven 10 for coating a battery pole piece 102, where the oven 10 includes an upwind cavity 101, a downwind cavity 103, a static pressure cavity 108, and a heater connected to the static pressure cavity 108, the static pressure cavity 108 is communicated with the upwind cavity 101 through a first valve 1081, and is communicated with the downwind cavity 103 through a second valve, a channel for conveying the battery pole piece 102 is provided between the upwind cavity 101 and the downwind cavity 103, and the temperature control method includes:

step S200: the actual temperature of the coating surface of the battery pole piece 102 is obtained, and the actual temperature value of the coating surface of the pole piece is compared with a preset calibration temperature of the coating surface of the battery pole piece 102 to obtain a first temperature difference value.

Specifically, a temperature detection device such as a temperature sensor is arranged on the coating surface of the battery pole piece 102 to acquire the actual temperature of the coating surface of the battery pole piece 102 in real time, and then the actual temperature of the coating surface of the battery pole piece 102 is compared with the calibration temperature of the coating surface of the battery pole piece 102 to obtain a first temperature difference value between the actual temperature of the coating surface of the battery pole piece 102 and the preset calibration temperature.

Step S202: and obtaining the calibration temperature between the blast nozzles 106 of the upper blast cavity according to the first temperature difference value and a preset first conversion rule.

Since the temperature transmission between the battery pole piece coating surface and the upwind cavity 101 is indirect transmission, and needs to pass through the upwind cavity tuyere 106 between the upwind cavity and the battery pole piece 102, and the temperature of the coating surface of the battery pole piece 102 and the temperature of the upwind cavity 101 have an error in the conversion process, when the fifth temperature difference value of the coating surface of the battery pole piece 102 is obtained, a temperature difference signal corresponding to the first temperature difference value can be transmitted to the control system, a corresponding relation between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 ° in the control system, the control system transmits the voltage signal corresponding to the first temperature difference value to the upwind cavity tuyere, and converts the corresponding voltage signal into a temperature value corresponding to the temperature value according to a preset conversion rule, for example, 5 ° corresponds to 0.5V, and the sum of the actual temperature between the temperature value and the upwind cavity tuyere 106 is the calibration temperature between the upwind cavity tuyeres 106.

Step S204: and acquiring the actual temperature between the upper air cavity nozzles 106, and comparing the actual temperature between the upper air cavity nozzles 106 with the calibrated temperature between the upper air cavity nozzles 106 to obtain a fourth temperature difference value.

Step S206: and obtaining the calibration temperature of the upwind cavity 101 according to the fourth temperature difference value and a preset third conversion rule.

Specifically, when a fourth temperature difference value between the actual temperature of the upper air cavity tuyere 106 and the calibration temperature thereof is obtained, a temperature difference signal corresponding to the fourth temperature difference value can be transmitted to the control system, a corresponding relation between a temperature value and a voltage value is set in the control system, for example, 0.1V voltage corresponds to 1 °, the control system transmits a voltage signal corresponding to the fourth temperature difference value to the upper air cavity, and converts the corresponding voltage signal into a temperature value corresponding to the voltage signal according to a preset third conversion rule, for example, 5 ° corresponds to 0.5V, and the sum of the temperature value and the actual temperature of the upper air cavity 101 is the calibration temperature of the upper air cavity 101, so that the calculation accuracy of the calibration temperature of the upper air cavity 101 is improved.

Step S208: and acquiring the actual temperature of the upper air cavity 101, and comparing the actual temperature of the upper air cavity 101 with the calibrated temperature of the upper air cavity 101 to obtain a second temperature difference value.

Step S210: the valve opening of the first valve 1081 is adjusted so that the temperature adjustment increment of the upper air cavity 101 is equal to the second temperature difference value.

Because the static pressure cavity 108 is communicated with the upper air cavity 101 through the first valve 1081, the temperature in the upper air cavity 101 can be adjusted by adjusting the opening degree of the first valve 1081, and then the temperature adjustment increment of the upper air cavity 101 is equal to the second temperature difference value through the relation between the preset valve opening degree and the heat control, so as to compensate the heat loss of the upper air cavity 101, and further ensure the heating uniformity of the temperature of the coating surface of the battery pole piece 102.

In one possible implementation manner, the method further includes: and obtaining the calibration temperature of the lower wind cavity body 103 according to the calibration temperature of the upper wind cavity body 101 and the preset temperature ratio between the upper wind cavity body 101 and the lower wind cavity body 103.

Since the preset temperature ratio between the upwind cavity 101 and the downwind cavity 103 is a known value, the calibration temperature of the downwind cavity 103 can be obtained under the condition that the calibration temperature of the upwind cavity 101 is available.

Specifically, after a temperature detection device such as a temperature sensor is arranged in the lower air cavity 103, the actual temperature of the lower air cavity 103 can be obtained, and the ratio of the actual temperature of the lower air cavity 103 to the calibration temperature of the upper air cavity 101 is the actual temperature ratio of the upper air cavity 101 to the lower air cavity 103.

Judging whether the actual temperature ratio of the upper air cavity body 101 to the lower air cavity body 103 is constant with the preset temperature ratio,

Whether the actual temperature ratio of the upper air cavity body 101 to the lower air cavity body 103 is constant with the preset temperature ratio or not is judged, so that whether the temperature of the lower air cavity body 103 needs to be adjusted or not can be determined, and the temperature ratio of the lower air cavity body 103 to the upper air cavity body 101 is always equal to the preset temperature ratio.

If the actual temperature ratio of the lower air cavity 103 to the upper air cavity 101 is the same as the preset temperature ratio, the temperature of the lower air cavity does not need to be adjusted, the temperature of the hydrostatic pressure cavity 108 is maintained, and the valve opening degrees of the first valve 1081 and the second valve are maintained.

As shown in fig. 3 and 4, an embodiment of the third aspect of the present application provides an oven 10, including: an upwind cavity body 101; the lower air cavity body 103 is symmetrically arranged below the upper air cavity body 101, and a battery pole piece 102 is arranged between the upper air cavity body 101 and the lower air cavity body 103; the static pressure cavity 108 is communicated with the upper air cavity body 101 through a first valve 1081 and is communicated with the lower air cavity body 103 through a second valve; the heater is communicated with the static pressure cavity 108 and used for supplying heat to the static pressure cavity 108; the first temperature sensor 104 is arranged on the coating surface of the battery pole piece 102 and used for detecting the actual temperature of the coating surface of the battery pole piece 102; a second temperature sensor 1082, disposed within hydrostatic cavity 108, for detecting an actual temperature within hydrostatic cavity 108; a third temperature sensor 105, which is arranged between the upper air cavity nozzles 106 and is used for detecting the actual temperature between the upper air cavity nozzles 106; the fourth temperature sensor 107 is arranged in the upper air cavity and used for detecting the actual temperature in the upper air cavity; the temperature conversion module is electrically connected with the first temperature sensor 104, the second temperature sensor 1082, the third temperature sensor 105 and the fourth temperature sensor 107, and is used for obtaining the calibration temperature of the upper air cavity 101 according to a first temperature difference between the actual temperature of the coating surface of the battery pole piece 102 and the preset calibration temperature of the coating surface of the battery pole piece 102 and a preset first conversion rule; comparing the actual temperature of the upper air cavity 101 with the calibrated temperature of the upper air cavity 101 to obtain a second temperature difference value; obtaining the calibration temperature of the static pressure cavity 108 according to the second temperature difference value and a preset second conversion rule; comparing the actual temperature of the static pressure cavity 108 with the calibrated temperature of the static pressure cavity 108 to obtain a second temperature difference value; and the temperature controller comprises a first control module electrically connected with the temperature conversion module and the heater, and the first control module is suitable for adjusting the heating flow of the heater according to the second temperature difference value, so that the temperature adjustment increment of the hydrostatic pressure cavity 108 on the upper air cavity 101 is equal to the second temperature difference value, and the actual temperature of the upper air cavity 101 is adjusted to be equal to the calibration temperature of the upper air cavity 101.

As shown in fig. 5, a fourth aspect of the present application provides an electronic device 200, including: a processor 201 and a memory 202.

The processor 201 is a control center of the electronic device 200, connects various components using various interfaces and lines, and performs various functions of the electronic device 200 by running or executing software programs and/or data stored in the memory 202, thereby integrally monitoring the electronic device 200.

In the embodiment of the present application, the processor 201, when calling the computer program stored in the memory 202, executes the method of temperature control provided in the embodiment shown in fig. 1 or fig. 2. Those skilled in the art will appreciate that fig. 5 is merely an example of an electronic device and is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or different components.

Embodiments of the fifth aspect of the present application provide a readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, enables an electronic device to perform the steps in the foregoing embodiments.

For convenience of description, the above parts are described separately as modules (or units) according to functions. Of course, the functionality of the various modules (or units) may be implemented in the same one or more pieces of software or hardware when the application is implemented.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. A temperature control method is used for an oven for coating a battery pole piece, the oven comprises an upper air cavity, a lower air cavity, a static pressure cavity and a heater connected with the static pressure cavity, the static pressure cavity is communicated with the upper air cavity through a first valve and is communicated with the lower air cavity through a second valve, and a channel for conveying the battery pole piece is arranged between the upper air cavity and the lower air cavity, and the temperature control method is characterized by comprising the following steps of:

acquiring the actual temperature of the coating surface of the battery pole piece, and comparing the actual temperature value of the coating surface of the pole piece with the preset calibration temperature of the coating surface of the battery pole piece to obtain a first temperature difference value;

obtaining the calibration temperature of the upper air cavity according to the first temperature difference value and a preset first conversion rule;

acquiring the actual temperature of the upper air cavity, and comparing the actual temperature of the upper air cavity with the calibration temperature of the upper air cavity to obtain a second temperature difference value;

obtaining the calibration temperature of the static pressure cavity according to the second temperature difference value and a preset second conversion rule;

acquiring the actual temperature of the static pressure cavity, and comparing the actual temperature of the static pressure cavity with the calibration temperature of the static pressure cavity to obtain a third temperature difference value;

2. The temperature control method according to claim 1, wherein the obtaining a preset calibration temperature of the windward cavity according to the first temperature difference value and a preset first conversion rule includes:

obtaining a calibration temperature between the air nozzles of the upper air cavity according to the first temperature difference value and a preset first conversion rule;

acquiring the actual temperature between the air nozzles of the upper air cavity, and comparing the actual temperature between the air nozzles of the upper air cavity with the calibrated temperature between the air nozzles of the upper air cavity to obtain a fourth temperature difference value;

3. The temperature control method according to claim 1, further comprising:

obtaining the calibration temperature of the lower wind cavity according to the calibration temperature of the upper wind cavity and the preset temperature ratio between the upper wind cavity and the lower wind cavity;

acquiring the actual temperature of the lower air cavity to obtain the actual temperature ratio of the upper air cavity to the lower air cavity;

judging whether the actual temperature ratio of the upper air cavity body to the lower air cavity body is constant with a preset temperature ratio or not;

if the temperature of the upper air cavity and the lower air cavity is not constant, the flow of the heater is adjusted, and the valve opening degrees of the first valve and the second valve are adjusted to keep the actual temperature ratio of the upper air cavity to the lower air cavity constant to a preset temperature ratio, or the opening degree of the second valve is adjusted to keep the actual temperature ratio of the upper air cavity to the lower air cavity constant to the preset temperature ratio;

4. A temperature control method is used for an oven for coating a battery pole piece, the oven comprises an upper air cavity, a lower air cavity, a static pressure cavity and a heater connected with the static pressure cavity, the static pressure cavity is communicated with the upper air cavity through a first valve and is communicated with the lower air cavity through a second valve, and a channel for conveying the battery pole piece is arranged between the upper air cavity and the lower air cavity, and the temperature control method is characterized by comprising the following steps of:

acquiring the actual temperature of a coating surface of a battery pole piece, and comparing the actual temperature value of the coating surface of the pole piece with a preset calibration temperature of the coating surface of the battery pole piece to obtain a first temperature difference value;

acquiring the actual temperature between the upper air cavity air nozzles, and comparing the actual temperature between the upper air cavity air nozzles with the calibrated temperature between the upper air cavity air nozzles to obtain a fourth temperature difference value;

obtaining the calibration temperature of the upper air cavity according to the fourth temperature difference value and a preset third conversion rule;

5. The temperature control method according to claim 4, further comprising:

if the temperature of the upper air cavity and the lower air cavity is not constant, the flow of the heater is adjusted, and the opening degrees of the first valve and the second valve are adjusted to keep the actual temperature ratio of the upper air cavity to the lower air cavity constant to a preset temperature ratio, or the opening degree of the second valve is adjusted to keep the actual temperature ratio of the upper air cavity to the lower air cavity constant to the preset temperature ratio;

6. An oven, comprising:

an upper air cavity;

the lower air cavity is symmetrically arranged below the upper air cavity, and a battery pole piece is arranged between the upper air cavity and the lower air cavity;

the static pressure cavity is communicated with the upper air cavity through a first valve and is communicated with the lower air cavity through a second valve;

the heater is communicated with the static pressure cavity and used for supplying heat to the static pressure cavity;

the first temperature sensor is arranged on the coating surface of the battery pole piece and used for detecting the actual temperature of the coating surface of the battery pole piece;

the second temperature sensor is arranged in the static pressure cavity and used for detecting the actual temperature in the static pressure cavity;

the third temperature sensor is arranged between the air nozzles of the upper air cavity and used for detecting the actual temperature between the air nozzles of the upper air cavity;

the fourth temperature sensor is arranged in the upper air cavity body and used for detecting the actual temperature in the upper air cavity body;

the temperature conversion module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor and is used for obtaining the calibration temperature of the upper air cavity according to a first temperature difference between the actual temperature of the coating surface of the battery pole piece and the preset calibration temperature of the coating surface of the battery pole piece and a preset first conversion rule; comparing the actual temperature of the upper air cavity with the calibrated temperature of the upper air cavity to obtain a second temperature difference value; obtaining the calibration temperature of the static pressure cavity according to the second temperature difference value and a preset second conversion rule; comparing the actual temperature of the static pressure cavity with the calibrated temperature of the static pressure cavity to obtain a third temperature difference value;

and the temperature controller comprises a first control module electrically connected with the temperature conversion module and the heater, and the first control module is suitable for adjusting the heating flow of the heater according to the third temperature difference value, so that the temperature adjustment increment of the static pressure cavity to the upper air cavity is equal to the third temperature difference value, and the actual temperature of the upper air cavity is adjusted to be equal to the calibrated temperature of the upper air cavity.

7. An electronic device comprising a processor and a memory, the memory storing computer readable instructions that, when executed by the processor, perform the method of any one of claims 1 to 5.

8. A readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 5.