Battery drying oven temperature control method and system

Abstract

This invention relates to the field of battery baking technology, specifically to a battery oven temperature control method and system. The battery oven temperature control method includes the following steps: a heating plate heats the battery; a first temperature probe detects the battery temperature, and a second temperature probe detects the heating plate temperature; when the first temperature probe detects that the battery temperature is lower than a first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than a second preset temperature; the heating plate is controlled to heat at a first preset heating rate; when the first temperature probe detects that the battery temperature reaches a third preset temperature, wherein the third preset temperature is lower than the first preset temperature; the heating plate is controlled to heat at a second preset heating rate, wherein the second preset heating rate is lower than the first preset heating rate; when the second temperature probe detects that the heating plate temperature reaches the second preset temperature; the heating plate is controlled to stop heating; when the first temperature probe detects that the battery temperature reaches the first preset temperature; the heating plate is controlled to enter a temperature control stage, maintaining the battery temperature stable at the first preset temperature until baking is complete.

Description

Technical Field

[0001] This invention relates to the field of battery baking technology, and specifically to a method and system for controlling the temperature of a battery baking oven. Background Technology

[0002] Currently, lithium battery baking processes typically use heating plates. During the baking process, the heating plate generates a large amount of heat and heats up rapidly, making it prone to temperature overshoot. Therefore, existing technologies use temperature probes to detect the heating plate's temperature and control its output power based on this reading. However, this method cannot provide precise control over the battery's heating process, leading to abnormal battery temperatures. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a battery oven temperature control method and system, aiming to solve the problem of abnormal battery temperature caused by the inability to precisely control the battery heating process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this application provides a method for temperature control in a battery drying oven, comprising the following steps:

[0006] Step 1: The heating plate heats the battery;

[0007] Step 2: The first temperature probe detects the temperature of the battery, and the second temperature probe detects the temperature of the heating plate;

[0008] Step 3: When the first temperature probe detects that the battery temperature is lower than the first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than the second preset temperature;

[0009] Step 4: Control the heating plate to heat up at the first preset heating rate;

[0010] Step 5: When the first temperature probe detects that the battery temperature has reached the third preset temperature, wherein the third preset temperature is lower than the first preset temperature;

[0011] Step 6: Control the heating plate to heat up at a second preset heating rate, wherein the second preset heating rate is less than the first preset heating rate;

[0012] Step 7: When the second temperature probe detects that the temperature of the heating plate has reached the second preset temperature;

[0013] Step 8: Control the heating plate to stop heating;

[0014] Step 9: When the first temperature probe detects that the battery temperature has reached the first preset temperature;

[0015] Step 10: Control the heating plate to enter the temperature control stage, and keep the battery temperature stable at the first preset temperature until baking is complete.

[0016] Specifically, in step 3, the first preset temperature is 100°C.

[0017] Specifically, in step 3, the second preset temperature is 200°C.

[0018] Specifically, in step 5, the third preset temperature is 90℃-95℃.

[0019] Specifically, in step 8, controlling the heating plate to stop heating involves controlling the output power of the heating plate using a PID controller to maintain the temperature of the heating plate at a second preset temperature.

[0020] Specifically, in step 10, the temperature control stage includes the following steps:

[0021] Control the heating plate to stop heating;

[0022] When the second temperature probe detects that the temperature of the heating plate has dropped from the second preset temperature to the first preset temperature;

[0023] The output power of the heating plate is controlled by PID to keep the battery temperature stable at the first preset temperature until the baking is finished.

[0024] Secondly, this application also provides a battery oven temperature control system, which adopts the above-mentioned battery oven temperature control method.

[0025] Specifically, including:

[0026] Heating plate, used to heat the battery;

[0027] The first temperature probe is used to measure the temperature of the battery;

[0028] The second temperature probe is used to measure the temperature of the heating plate;

[0029] The controller is electrically connected to the heating plate, the first temperature probe, and the second temperature probe.

[0030] The battery oven temperature control method and system described in this invention have the following advantages:

[0031] The battery oven temperature control method of this application can perform high-precision control of the battery heating process, avoid abnormal battery temperature, effectively control the battery heating rate throughout the process, ensure high battery temperature consistency, and accurately control the temperature within the normal range.

[0032] During the initial heating phase of the battery, if the first temperature probe detects that the battery temperature is lower than the first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than the second preset temperature, the heating plate can be controlled to heat up rapidly at the first preset heating rate to improve heating efficiency. However, because the rapid heating at the first preset rate results in excessive heat generation, the temperature at the location measured by the first temperature probe reaches the first preset temperature too quickly, while the temperature at other locations on the battery has not yet reached the first preset temperature due to its internal heat transfer efficiency, affecting battery temperature uniformity. Therefore, when the first temperature probe detects that the battery temperature reaches a third preset temperature (lower than the first preset temperature), it indicates that the battery temperature is approaching the target heating temperature (the first preset temperature). At this point, the heating plate needs to be controlled to heat up at a second preset rate (lower than the first preset rate) to slow down the heating rate, allowing sufficient time for internal heat transfer and ensuring that the temperature at different locations on the battery becomes more uniform, thus improving battery temperature uniformity. To prevent the heating plate from burning out due to overheating, when the second temperature probe detects that the heating plate temperature has reached the second preset temperature, the heating plate is stopped to prevent damage. Since the first temperature probe detects that the battery temperature has reached the first preset temperature, that is, the battery has reached the target heating temperature, the control heating plate enters the temperature control stage to keep the battery temperature stable at the first preset temperature until the baking is over. Attached Figure Description

[0033] Figure 1 This is a schematic flowchart of the battery oven temperature control method according to an embodiment of the present invention;

[0034] Figure 2 This is a connection block diagram of the battery oven temperature control system according to an embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, the battery oven temperature control method of the present invention includes the following steps:

[0037] Step 1: The heating plate heats the battery;

[0038] Step 2: The first temperature probe detects the temperature of the battery, and the second temperature probe detects the temperature of the heating plate;

[0039] Step 3: When the first temperature probe detects that the battery temperature is lower than the first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than the second preset temperature;

[0040] Step 4: Control the heating plate to heat up at the first preset heating rate;

[0041] Step 5: When the first temperature probe detects that the battery temperature has reached the third preset temperature, wherein the third preset temperature is lower than the first preset temperature;

[0042] Step 6: Control the heating plate to heat up at a second preset heating rate, wherein the second preset heating rate is less than the first preset heating rate;

[0043] Step 7: When the second temperature probe detects that the temperature of the heating plate has reached the second preset temperature;

[0044] Step 8: Control the heating plate to stop heating;

[0045] Step 9: When the first temperature probe detects that the battery temperature has reached the first preset temperature;

[0046] Step 10: Control the heating plate to enter the temperature control stage, and keep the battery temperature stable at the first preset temperature until baking is complete.

[0047] The battery oven temperature control method can precisely control the battery heating process, avoiding abnormal battery temperatures. The entire process effectively controls the battery heating rate, ensuring high battery temperature consistency and precisely controlling the temperature within the normal range.

[0048] During the initial heating phase of the battery, if the first temperature probe detects that the battery temperature is lower than the first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than the second preset temperature, the heating plate can be controlled to heat up rapidly at the first preset heating rate to improve heating efficiency. However, because the rapid heating at the first preset rate results in excessive heat generation, the temperature at the location measured by the first temperature probe reaches the first preset temperature too quickly, while the temperature at other locations on the battery has not yet reached the first preset temperature due to its internal heat transfer efficiency, affecting battery temperature uniformity. Therefore, when the first temperature probe detects that the battery temperature reaches a third preset temperature (lower than the first preset temperature), it indicates that the battery temperature is approaching the target heating temperature (the first preset temperature). At this point, the heating plate needs to be controlled to heat up at a second preset rate (lower than the first preset rate) to slow down the heating rate, allowing sufficient time for internal heat transfer and ensuring that the temperature at different locations on the battery becomes more uniform, thus improving battery temperature uniformity. To prevent the heating plate from burning out due to overheating, when the second temperature probe detects that the heating plate temperature has reached the second preset temperature, the heating plate is stopped to prevent damage. Since the first temperature probe detects that the battery temperature has reached the first preset temperature, that is, the battery has reached the target heating temperature, the control heating plate enters the temperature control stage to keep the battery temperature stable at the first preset temperature until the baking is over.

[0049] Specifically, in step 3, the first preset temperature is 100°C.

[0050] Specifically, in step 3, the second preset temperature is 200°C.

[0051] Specifically, in step 5, the third preset temperature is 90℃-95℃. It can be understood that the third preset temperature can be selected as 90℃, 91℃, 92℃, 93℃, 94℃ or 95℃ according to actual needs.

[0052] Specifically, in step 8, controlling the heating plate to stop heating involves controlling the output power of the heating plate using a PID controller to maintain the temperature of the heating plate at a second preset temperature.

[0053] The temperature is regulated by using a PID (Proportional-Integral-Derivative) controller to adjust the output duty cycle. The output power of the heating plate is controlled by adjusting the PID output duty cycle, thereby controlling the temperature to maintain the temperature of the heating plate at a second preset temperature. At the second preset temperature, the heating plate can transfer a large amount of heat to the battery, thereby improving the battery's heating rate and accelerating the baking efficiency.

[0054] Specifically, in step 10, the temperature control stage includes the following steps:

[0055] Control the heating plate to stop heating;

[0056] When the second temperature probe detects that the temperature of the heating plate has dropped from the second preset temperature to the first preset temperature;

[0057] The output power of the heating plate is controlled by PID to keep the battery temperature stable at the first preset temperature until the baking is finished.

[0058] Since the battery temperature has reached the first preset temperature, in order to prevent the battery temperature from rising further, the heating plate is controlled to stop heating, and the temperature of the heating plate is reduced from the second preset temperature to the first preset temperature. Since the temperature of the heating plate is still greater than the temperature of the battery during the cooling process, the heating plate can still transfer heat to the battery, so that the battery temperature can be stabilized at the first preset temperature. When the temperature of the heating plate drops to the first preset temperature, in order to ensure that the battery temperature can be stabilized at the first preset temperature, the output power of the heating plate is controlled by PID.

[0059] Specifically, in steps 4 and 6, the first preset heating rate and the second preset heating rate are automatically adjusted according to the PID control. These rates change based on the temperature measured by the first temperature probe approaching the first preset temperature. This continuous control of the battery's heating rate keeps it within a controlled range, preventing excessively rapid heating from affecting the uniformity of the baking process and avoiding excessively slow heating from affecting the baking efficiency.

[0060] like Figure 2 As shown, the battery oven temperature control system of the present invention adopts the battery oven temperature control method mentioned above.

[0061] Specifically, the battery oven temperature control system includes:

[0062] Heating plate, used to heat the battery;

[0063] The first temperature probe is used to measure the temperature of the battery.

[0064] The second temperature probe is used to measure the temperature of the heating plate.

[0065] The controller is electrically connected to the heating plate, the first temperature probe, and the second temperature probe.

[0066] At the start of baking, the controller controls the heating plate to heat the battery;

[0067] The first temperature probe detects the temperature of the battery and feeds that temperature back to the controller; the second temperature probe detects the temperature of the heating plate and feeds that temperature back to the controller.

[0068] The controller receives the detected temperatures from the first temperature probe and the second temperature probe, and determines whether the temperature of the first temperature probe is lower than the first preset temperature, and at the same time determines whether the temperature of the second temperature probe is lower than the second preset temperature. If the temperature of the first temperature probe is lower than the first preset temperature and the temperature of the second temperature probe is lower than the second preset temperature, the controller increases the output power of the heating plate, so that the heating plate heats up at the first preset heating rate.

[0069] During the heating process of the heating plate at the first preset heating rate, the controller receives the battery temperature detected by the first temperature probe and it reaches the third preset temperature. The controller then reduces the output power of the heating plate, so that the heating plate heats up at the second preset heating rate.

[0070] To prevent the heating plate from overheating and burning out, during the heating process, the controller receives a second temperature probe that detects that the temperature of the heating plate has reached the second preset temperature. The controller then uses PID control to control the output power of the heating plate to maintain the temperature of the heating plate at the second preset temperature.

[0071] The controller receives a first temperature probe and detects that the battery temperature has reached the first preset temperature; the controller controls the heating plate to stop heating, and the controller receives a second temperature probe and detects that the heating plate temperature has dropped from the second preset temperature to the first preset temperature. The controller controls the output power of the heating plate through PID control to keep the battery temperature stable at the first preset temperature until the baking is over.

[0072] The battery heating process is precisely controlled to prevent abnormal temperature phenomena. The entire process effectively controls the battery heating rate, resulting in high temperature consistency and precise control of the temperature within the normal range.

[0073] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for temperature control in a battery drying oven, characterized in that, Includes the following steps: Step 1: The heating plate heats the battery; Step 2: The first temperature probe detects the temperature of the battery, and the second temperature probe detects the temperature of the heating plate; Step 3: When the first temperature probe detects that the battery temperature is lower than the first preset temperature, and the second temperature probe detects that the heating plate temperature is lower than the second preset temperature; Step 4: Control the heating plate to heat up at the first preset heating rate; Step 5: When the first temperature probe detects that the battery temperature has reached the third preset temperature, wherein the third preset temperature is lower than the first preset temperature; Step 6: Control the heating plate to heat up at a second preset heating rate, wherein the second preset heating rate is less than the first preset heating rate; Step 7: When the second temperature probe detects that the temperature of the heating plate has reached the second preset temperature; Step 8: Control the heating plate to stop heating. Specifically, control the output power of the heating plate through PID control to maintain the temperature of the heating plate at the second preset temperature. Step 9: When the first temperature probe detects that the battery temperature has reached the first preset temperature; Step 10: Control the heating plate to enter the temperature control stage. The specific steps of the temperature control stage are as follows: Control the heating plate to stop heating; When the second temperature probe detects that the temperature of the heating plate has dropped from the second preset temperature to the first preset temperature; The output power of the heating plate is controlled by PID to keep the battery temperature stable at the first preset temperature until the baking is finished.

2. The battery oven temperature control method according to claim 1, characterized in that, In step 3, the first preset temperature is 100℃.

3. The battery oven temperature control method according to claim 1, characterized in that, In step 3, the second preset temperature is 200°C.

4. The battery oven temperature control method according to claim 1, characterized in that, In step 5, the third preset temperature is 90℃-95℃.

5. A battery drying oven temperature control system, characterized in that, The battery oven temperature control method described in any one of claims 1-4 is adopted.

6. The battery oven temperature control system according to claim 5, characterized in that, include: Heating plate, used to heat the battery; The first temperature probe is used to measure the temperature of the battery; The second temperature probe is used to measure the temperature of the heating plate; The controller is electrically connected to the heating plate, the first temperature probe, and the second temperature probe.

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