PTC heater power control method, device, equipment and medium

Abstract

The invention provides a PTC heater power control method, device and equipment and a medium, the method is applied to a controller of a PTC heater power control system, and the method comprises the following steps: calculating according to an obtained target power value and a current power value to obtain a power difference value; comparing the power difference value with a preset difference value to obtain a comparison result, and adjusting the current duty ratio to obtain a target duty ratio; and for the vehicle battery pack, the IGBT assembly performs continuous power supply control processing on the LC circuit according to the target duty ratio, so that the LC circuit performs real-time adjustment on the average voltage value of the PTC heater in each first preset period, and the current value of the PTC heater in each first preset period forms a preset waveform, thereby realizing power control on the PTC heater. According to the embodiment of the invention, peak current and noise are not generated in the control process, so that the safety is improved.

Description

Technical Field

[0001] The present invention relates to the field of PTC heater control, and in particular to a PTC heater power control method, device, equipment and medium. Background Art

[0002] With the continuous advancement of new energy electric vehicle technology, electric vehicles have been widely used in private households, commercial transportation, public transportation and other fields. However, during the use of electric vehicles, PCT heaters are required to provide heat to ensure functionality and comfort. PTC heaters are turned on when needed and turned off when not needed. However, during the switching process of PTC heaters, a very high peak current is generated and accompanied by a large noise, which is harmful to the human body, resulting in low safety.

[0003] Therefore, the existing PTC heater power control method has the problem of low safety. Summary of the invention

[0004] The embodiments of the present invention provide a PTC heater power control method, device, equipment and medium, aiming to solve the problem of low safety in the existing PTC heater power control method.

[0005] In a first aspect, an embodiment of the present invention provides a PTC heater power control method, which is applied to a controller of a PTC heater power control system, wherein the PTC heater power control system includes an IGBT component, an LC circuit, a PTC heater, a sampling circuit, and a vehicle battery pack; the controller is communicatively connected to the IGBT component and the sampling circuit, the LC circuit is communicatively connected to the IGBT component and the PTC heater, the sampling circuit is also communicatively connected to the PTC heater, and the vehicle battery pack is electrically connected to the IGBT component; the method includes: Controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; Performing a preset calculation process on the multiple sampling values ​​to obtain a current power value; A power difference is obtained by performing a difference calculation based on the acquired target power value and the current power value; Comparing the power difference with a preset difference to obtain a comparison result; Based on the comparison result, the current duty cycle is adjusted to obtain a target duty cycle; For the automotive battery pack, the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0006] In a second aspect, an embodiment of the present invention further provides a PTC heater power control device, the device is configured in a controller of a PTC heater power control system, the PTC heater power control system includes an IGBT component, an LC circuit and a PTC heater, a sampling circuit and a vehicle battery pack, the controller is communicatively connected to the IGBT component and the sampling circuit, the LC circuit is communicatively connected to the IGBT component and the PTC heater, the sampling circuit is also communicatively connected to the PTC heater, and the vehicle battery pack is electrically connected to the IGBT component; the device includes: A sampling unit, controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; A first calculation unit performs a preset calculation process on the plurality of sampling values ​​to obtain a current power value; A second calculation unit, performing a difference calculation based on the acquired target power value and the current power value to obtain a power difference value; A comparison unit, which compares the power difference with a preset difference to obtain a comparison result; an adjusting unit, which adjusts the current duty cycle based on the comparison result to obtain a target duty cycle; The control unit, for the vehicle battery pack, has the IGBT component perform continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the DC voltage of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0007] In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the method described in the first aspect is implemented.

[0008] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the storage medium stores a computer program, wherein the computer program includes program instructions, and wherein the program instructions, when executed by a processor, can implement the method described in the first aspect above.

[0009] The present invention provides a PTC heater power control method, device, equipment and medium. The method is applied to a controller of a PTC heater power control system. The PTC heater power control system includes an IGBT component, an LC circuit, a PTC heater, a sampling circuit and a vehicle battery pack; the controller is connected to the IGBT component and the sampling circuit for communication, the LC circuit is connected to the IGBT component and the PTC heater for communication, the sampling circuit is also connected to the PTC heater for communication, and the vehicle battery pack is electrically connected to the IGBT component; the method includes: controlling the sampling circuit to sample the PTC heater to obtain multiple sampling values; The preset calculation process is performed on the multiple sampled values ​​to obtain the current power value; the difference calculation is performed based on the obtained target power value and the current power value to obtain the power difference; the power difference is compared with the preset difference to obtain the comparison result; the current duty cycle is adjusted based on the comparison result to obtain the target duty cycle; for the vehicle battery pack, the IGBT component performs continuous power control processing on the LC circuit according to the target duty cycle, so that the LC circuit adjusts the average voltage value of each first preset cycle of the PTC heater in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, so as to achieve power control of the PTC heater. The embodiment of the present invention can use the comparison result to adjust the current duty cycle to obtain the target duty cycle, thereby improving the adjustment efficiency; the embodiment of the present invention can also use the vehicle battery pack, and the IGBT component performs continuous power control processing on the LC circuit according to the target duty cycle, so that the LC circuit adjusts the average voltage value of each first preset cycle of the PTC heater in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, so as to achieve power control of the PTC heater. Therefore, during the control process, the current input to the PTC heater is continuous, and no high peak current and noise are generated, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0011] Figure 1 A schematic flow chart of a PTC heater power control method provided by an embodiment of the present invention; Figure 2 A schematic block diagram of a PTC heater power control device provided by an embodiment of the present invention; Figure 3 A schematic block diagram of an electronic device provided by an embodiment of the present invention; Figure 4 A schematic diagram of a scenario of a PTC heater power control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0014] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0015] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. The embodiment of the present invention provides a PTC heater power control method, device, equipment and medium. The PTC heater power control method can be found in Figure 4 , Figure 4 A schematic diagram of a scenario of a PTC heater power control method provided in an embodiment of the present invention. The method is applied to a controller 11 of a PTC heater power control system 10, wherein the PTC heater power control system 10 includes an IGBT component 12, an LC circuit 13, a PTC heater 14, a sampling circuit 15, and a vehicle battery pack 16, wherein the controller 11 is in communication connection with the IGBT component 12 and the sampling circuit 15, the LC circuit 13 is in communication connection with the IGBT component 12 and the PTC heater 14, the sampling circuit 15 is also in communication connection with the PTC heater 14, and the vehicle battery pack 16 is electrically connected with the IGBT component 12.

[0016] Figure 1Schematic diagram of the process of the PTC heater power control method provided by the embodiment of the present invention. Figure 1 As shown, the method includes the following steps S110-S160.

[0017] S110 , controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values.

[0018] In this embodiment, the sampling circuit is used to collect the voltage and current input to the PTC heater multiple times, and the multiple sampling values ​​can be obtained. Specifically, the controller sends a sampling command to the sampling circuit to enable the sampling circuit to sample the PTC heater to obtain the multiple sampling values. Among them, the multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; the multiple voltage sampling values ​​are high-voltage input voltages, which are used to calculate power and overvoltage protection; the multiple current sampling values ​​are current values ​​flowing through the PTC core, which are used to calculate power and overcurrent protection. The PTC heater power control system may also include a temperature detector, which detects the system temperature through the temperature detector and shuts down when the system temperature exceeds a threshold value for over-temperature protection.

[0019] S120: Perform a preset calculation process on the multiple sampling values ​​to obtain a current power value.

[0020] In this embodiment, the current power value may be obtained by performing a preset calculation process on the multiple sampling values.

[0021] In one embodiment, the multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; performing a preset calculation process on the multiple sampling values ​​to obtain the current power value includes: Performing mean processing on the multiple voltage sampling values ​​to obtain an average voltage sampling value, and performing mean processing on the multiple current sampling values ​​to obtain an average current sampling value; The average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value.

[0022] In this embodiment, the sampling circuit collects the voltage and current input to the PTC heater multiple times within the second preset period, and can obtain the multiple voltage sampling values ​​and the multiple current sampling values. The second preset period may include 1 second, 2 seconds, etc., and the second preset period includes multiple second preset sub-periods, such as the second preset sub-period may be 100 microseconds, 200 microseconds, etc. In this way, the sampling circuit can collect the voltage and current input to the PTC heater 10,000 times within the second preset period to obtain 10,000 voltage sampling values ​​and 10,000 current sampling values, that is, the number of sampling times = second preset period / second preset sub-period.

[0023] The multiple voltage sampling values ​​among the multiple sampling values ​​are averaged to obtain an average voltage sampling value, and the multiple current sampling values ​​among the multiple sampling values ​​are averaged to obtain an average current sampling value; the average voltage sampling value and the average current sampling value are calculated to obtain the current power value. Specifically, within the second preset period, the multiple voltage sampling values ​​are added to obtain a total voltage sampling value, and the total voltage sampling value / the number of samplings is used to equal the average voltage sampling value for calculation processing; similarly, within the second preset period, the multiple current sampling values ​​are added to obtain a current sampling value, and the total current sampling value / the number of samplings is used to equal the average current sampling value for calculation processing; the average voltage sampling value and the average current sampling value are multiplied by the formula of power = voltage * current to obtain the current power value. The current power value is the average power value within the second preset period.

[0024] Through the above embodiments, it can be known that the average voltage sampling value and the average current sampling value are obtained by respectively performing average processing on the collected multiple voltage sampling values ​​and the multiple current sampling values, and the average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value, thereby ensuring the accuracy of the data so that targeted processing can be performed later according to the current power value.

[0025] S130. Perform a difference calculation based on the acquired target power value and the current power value to obtain a power difference value.

[0026] In this embodiment, the PTC heater power control system may further include a vehicle control terminal, which is controlled by a vehicle user; the target power value may be obtained from the vehicle control terminal. Specifically, the target power value and the current power value are subjected to a difference calculation process to obtain the power difference, that is, the power difference = the target power value - the current power value.

[0027] S140: Compare the power difference with a preset difference to obtain a comparison result.

[0028] In this embodiment, the comparison result includes comparison results of two situations, the first result is that the power difference is less than or equal to the preset difference, and the second result is that the power difference is greater than the preset difference. The preset difference can be configured according to actual conditions; that is, the power difference is compared with the preset difference to obtain comparison results of the two situations that the power difference is less than or equal to the preset difference and the power difference is greater than the preset difference.

[0029] S150: Adjust the current duty cycle based on the comparison result to obtain a target duty cycle.

[0030] In this embodiment, the current duty cycle may be a preset initial duty cycle or an adjusted duty cycle.

[0031] In one embodiment, adjusting the current duty cycle based on the comparison result to obtain the target duty cycle includes: If the comparison result is that the power difference is less than or equal to the preset difference, then increasing the current duty cycle to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

[0032] In one embodiment, the step of performing value-added processing on the current duty cycle to obtain the target duty cycle includes: Get the preset value-added ratio; The current duty cycle is added to the preset value-added ratio to obtain the target duty cycle.

[0033] In one embodiment, the step of performing a decrement process on the current duty cycle to obtain the target duty cycle includes: Obtain the preset impairment ratio; The target duty cycle is obtained by subtracting the current duty cycle from the preset decrement ratio.

[0034] In this embodiment, when the comparison result is that the power difference is less than or equal to the preset difference, the current duty cycle is value-added to obtain the target duty cycle; specifically, the preset value-added ratio is obtained; the current duty cycle is added to the preset value-added ratio to obtain the target duty cycle, that is, the current duty cycle + the preset value-added ratio = the target duty cycle; and after each preset duration, the target duty cycle is used as the current duty cycle, and the current duty cycle is added to the preset value-added ratio to obtain the target duty cycle. The preset value-added ratio can be a value such as 0.1%, 0.2%, etc.

[0035] When the comparison result is that the power difference is greater than the preset difference, the current duty cycle is deducted to obtain the target duty cycle; specifically, the preset deduction ratio is obtained; the current duty cycle is subtracted from the preset deduction ratio to obtain the target duty cycle, that is, the current duty cycle - the preset deduction ratio = the target duty cycle; and after each preset duration, the target duty cycle is used as the current duty cycle, and the current duty cycle is subtracted from the preset deduction ratio to obtain the target duty cycle. The preset deduction ratio can be a value such as 0.1%, 0.2%, etc.

[0036] Through the above embodiments, it can be known that when the comparison result is that the power difference is less than or equal to the preset difference, the preset appreciation ratio is used to perform appreciation processing on the current duty cycle to obtain the target duty cycle; when the comparison result is that the power difference is greater than the preset difference, the preset depreciation ratio is used to perform depreciation processing on the current duty cycle to obtain the target duty cycle, thereby achieving standardized processing of adjusting the current duty cycle according to the comparison result to obtain the target duty cycle, ensuring the timeliness of the adjustment and improving the adjustment efficiency.

[0037] S160. For the vehicle battery pack, the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0038] In this embodiment, the LC circuit includes a capacitor, an inductor and a diode, etc. The first end of the capacitor is connected to the second end of the inductor and the PTC heater, and the second end of the capacitor is connected to the positive electrode of the diode; the first end of the inductor is connected to the negative electrode of the diode and the IGBT component.

[0039] Specifically, step S160 includes: in each first preset cycle, under the control of the IGBT component according to the target duty cycle, the vehicle battery pack realizes the charging process of the inductor in the LC circuit to increase the average voltage value input to the PTC heater, and input a higher first current to the PTC heater, so as to achieve the effect of turning on the PTC heater; and when the vehicle battery pack does not charge the inductor in the LC circuit, the inductor in the LC circuit continues to flow, so as to lower the average voltage value input to the PTC heater, and output a lower second current to the PTC heater, so as to achieve the effect of turning off the PTC heater; and in the next first preset cycle, continue to control according to the above steps. In this way, by adjusting the average voltage value in real time, the current input to the PTC heater is continuous, and no high peak current and noise are generated, thereby improving safety.

[0040] Among them, the first current is the highest current value, which can be 20A, etc., and can be set according to actual conditions; the second current is the lowest current value, which can be 0.5A, etc., and can be set according to actual conditions; the first preset period can include 1 second, 2 seconds, etc., and the first preset period includes multiple first preset sub-periods, for example, the first preset sub-period can be 100 microseconds, 200 microseconds, etc.

[0041] In one embodiment, the change trend of the preset waveform is a continuous waveform.

[0042] In this embodiment, under the control of the IGBT component according to the target duty cycle, the vehicle battery pack realizes the charging process of the inductor in the LC circuit to increase the average voltage value input to the PTC heater, and input a higher first current to the PTC heater, so as to achieve the effect of turning on the PTC heater; and when the vehicle battery pack does not charge the LC circuit, the inductor in the LC circuit continues to flow, so as to lower the average voltage value input to the PTC heater, and input a lower second current to the PTC heater, so as to achieve the effect of turning off the PTC heater; therefore, the average voltage value in each first preset cycle of the PTC heater is adjusted in real time through the LC circuit, so that the current value input to the PTC heater is continuous, that is, the current value of the PTC heater in each first preset cycle forms a continuous waveform, so as to achieve the power control of the PTC heater. Therefore, in the control process, the current input to the PTC heater is continuous, and no high peak current and no noise are generated, thereby improving safety.

[0043] In summary, the embodiment of the present invention can use the comparison result to adjust the current duty cycle to obtain the target duty cycle, thereby improving the adjustment efficiency; the embodiment of the present invention can also use the vehicle battery pack, and the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of each first preset cycle of the PTC heater in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater. Therefore, during the control process, the current input to the PTC heater is continuous, and no high peak current or noise is generated, thereby improving safety.

[0044] Figure 2 Schematic block diagram of a PTC heater power control device provided by an embodiment of the present invention. Figure 2 As shown, corresponding to the above PTC heater power control method, the present invention also provides a PTC heater power control device, the device is configured in the controller of the PTC heater power control system, the PTC heater power control system includes an IGBT component, an LC circuit and a PTC heater, a sampling circuit and a vehicle battery pack, the controller is connected to the IGBT component and the sampling circuit for communication, the LC circuit is connected to the IGBT component and the PTC heater for communication, the sampling circuit is also connected to the PTC heater for communication, and the vehicle battery pack is electrically connected to the IGBT component. Specifically, please refer to Figure 2 , the PTC heater power control device 700 comprises: A sampling unit 701 controls the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; A first calculation unit 702 performs a preset calculation process on the plurality of sampling values ​​to obtain a current power value; A second calculation unit 703 performs a difference calculation based on the acquired target power value and the current power value to obtain a power difference value; A comparison unit 704 compares the power difference with a preset difference to obtain a comparison result; An adjusting unit 705 adjusts the current duty cycle based on the comparison result to obtain a target duty cycle; The control unit 706, for the vehicle battery pack, has the IGBT component perform continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0045] In some embodiments, when the adjusting unit 705 performs the step of adjusting the current duty cycle based on the comparison result to obtain the target duty cycle, it is specifically used to: If the comparison result is that the power difference is less than or equal to the preset difference, then increasing the current duty cycle to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

[0046] In some embodiments, when the adjusting unit 705 performs the step of performing value-added processing on the current duty cycle to obtain the target duty cycle, it is specifically used to: Get the preset value-added ratio; The current duty cycle is added to the preset value-added ratio to obtain the target duty cycle.

[0047] In some embodiments, when the adjustment unit 705 performs the step of performing a decrement process on the current duty cycle to obtain the target duty cycle, it is specifically configured to: Obtain the preset impairment ratio; The target duty cycle is obtained by subtracting the current duty cycle from the preset decrement ratio.

[0048] In some embodiments, the control unit 706 is specifically used to: for the vehicle battery pack, the IGBT component performs continuous power control processing on the LC circuit according to the target duty cycle, so that the LC circuit adjusts the average voltage value of each first preset cycle of the PTC heater in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform to realize the power control step of the PTC heater. The change trend of the preset waveform is a continuous waveform.

[0049] In some embodiments, the multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; when the first calculation unit 702 performs a preset calculation process on the multiple sampling values ​​to obtain a current power value, it is specifically used to: Performing mean processing on the multiple voltage sampling values ​​to obtain an average voltage sampling value, and performing mean processing on the multiple current sampling values ​​to obtain an average current sampling value; The average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value.

[0050] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the above-mentioned PTC heater power control device and each unit can refer to the corresponding description in the aforementioned method embodiment, and for the convenience and brevity of description, it will not be repeated here.

[0051] The above-mentioned PTC heater power control device can be implemented in the form of a computer program. The computer program can be used in Figure 3 Runs on the computer device shown.

[0052] See also Figure 3 , Figure 3 800 is a schematic block diagram of an electronic device provided by an embodiment of the present invention. The computer device 800 may be a terminal or a server, wherein the terminal may be an electronic device with a communication function. The server may be an independent server or a server cluster composed of multiple servers.

[0053] See also Figure 3 The electronic device 800 includes a processor 802 , a memory and a network interface 805 connected via a system bus 801 , wherein the memory may include a non-volatile storage medium 803 and an internal memory 804 .

[0054] The non-volatile storage medium 803 can store an operating system 8031 ​​and a computer program 8032. The computer program 8032 includes program instructions, and when the program instructions are executed, the processor 802 can execute a PTC heater power control method.

[0055] The processor 802 is used to provide computing and control capabilities to support the operation of the entire electronic device 800 .

[0056] The internal memory 804 provides an environment for the operation of the computer program 8032 in the non-volatile storage medium 803. When the computer program 8032 is executed by the processor 802, the processor 802 can execute a PTC heater power control method.

[0057] The network interface 805 is used to communicate with other devices over the network. Figure 3 The structure shown in the figure is merely a block diagram of a partial structure related to the solution of the present invention, and does not constitute a limitation on the electronic device 800 to which the solution of the present invention is applied. The specific electronic device 800 may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0058] The processor 802 is used to run the computer program 8032 stored in the memory to implement the following steps: Controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; Performing a preset calculation process on the multiple sampling values ​​to obtain a current power value; A power difference is obtained by performing a difference calculation based on the acquired target power value and the current power value; Comparing the power difference with a preset difference to obtain a comparison result; Based on the comparison result, the current duty cycle is adjusted to obtain a target duty cycle; For the automotive battery pack, the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0059] In some embodiments, when the processor 802 implements the step of adjusting the current duty cycle based on the comparison result to obtain the target duty cycle, the processor 802 specifically implements the following steps: If the comparison result is that the power difference is less than or equal to the preset difference, then increasing the current duty cycle to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

[0060] In some embodiments, when the processor 802 implements the step of performing value-added processing on the current duty cycle to obtain the target duty cycle, the processor 802 specifically implements the following steps: Get the preset value-added ratio; The current duty cycle is added to the preset value-added ratio to obtain the target duty cycle.

[0061] In some embodiments, when the processor 802 implements the step of performing a decrement process on the current duty cycle to obtain the target duty cycle, the processor 802 specifically implements the following steps: Obtain the preset impairment ratio; The target duty cycle is obtained by subtracting the current duty cycle from the preset decrement ratio.

[0062] In some embodiments, the processor 802 further implements the following steps: The change trend of the preset waveform is a continuous waveform.

[0063] In some embodiments, the multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; when the processor 802 implements the step of performing a preset calculation process on the multiple sampling values ​​to obtain the current power value, the processor 802 specifically implements the following steps: Performing mean processing on the multiple voltage sampling values ​​to obtain an average voltage sampling value, and performing mean processing on the multiple current sampling values ​​to obtain an average current sampling value; The average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value.

[0064] It should be understood that in the embodiment of the present invention, the processor 802 may be a central processing unit (CPU), and the processor 802 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0065] It can be understood by those skilled in the art that all or part of the processes in the method for implementing the above embodiment can be completed by instructing the relevant hardware through a computer program. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiment of the above method.

[0066] Therefore, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor executes the following steps: Controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; Performing a preset calculation process on the multiple sampling values ​​to obtain a current power value; A power difference is obtained by performing a difference calculation based on the acquired target power value and the current power value; Comparing the power difference with a preset difference to obtain a comparison result; Based on the comparison result, the current duty cycle is adjusted to obtain a target duty cycle; For the automotive battery pack, the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

[0067] In one embodiment, when the processor executes the program instructions to implement the step of adjusting the current duty cycle based on the comparison result to obtain the target duty cycle, the processor specifically implements the following steps: If the comparison result is that the power difference is less than or equal to the preset difference, then increasing the current duty cycle to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

[0068] In one embodiment, when the processor executes the program instruction to implement the step of performing value-added processing on the current duty cycle to obtain the target duty cycle, the processor specifically implements the following steps: Get the preset value-added ratio; The current duty cycle is added to the preset value-added ratio to obtain the target duty cycle.

[0069] In one embodiment, when the processor executes the program instruction to implement the step of performing a decrement process on the current duty cycle to obtain the target duty cycle, the processor specifically implements the following steps: Obtain the preset impairment ratio; The target duty cycle is obtained by subtracting the current duty cycle from the preset decrement ratio.

[0070] In one embodiment, the processor implements the following steps when executing the program instructions: the change trend of the preset waveform is a continuous waveform.

[0071] In one embodiment, the multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; when the processor executes the program instructions to implement the step of performing preset calculation processing on the multiple sampling values ​​to obtain the current power value, the processor specifically implements the following steps: Performing mean processing on the multiple voltage sampling values ​​to obtain an average voltage sampling value, and performing mean processing on the multiple current sampling values ​​to obtain an average current sampling value; The average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value.

[0072] The storage medium may be a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk, etc., which are computer-readable storage media that can store program codes.

[0073] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0074] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0075] The steps in the method of the embodiment of the present invention can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0076] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, terminal, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A PTC heater power control method, characterized in that: The method is applied to a controller of a PTC heater power control system, wherein the PTC heater power control system includes an IGBT component, an LC circuit, a PTC heater, a sampling circuit and a vehicle battery pack; the controller is in communication connection with the IGBT component and the sampling circuit, the LC circuit is in communication connection with the IGBT component and the PTC heater, the sampling circuit is also in communication connection with the PTC heater, and the vehicle battery pack is electrically connected with the IGBT component; the method includes: Controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; Performing a preset calculation process on the multiple sampling values ​​to obtain a current power value; A power difference is obtained by performing a difference calculation based on the acquired target power value and the current power value; Comparing the power difference with a preset difference to obtain a comparison result; Based on the comparison result, the current duty cycle is adjusted to obtain a target duty cycle; For the automotive battery pack, the IGBT component performs continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the current value of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

2. The PTC heater power control method according to claim 1, characterized in that: The adjusting the current duty cycle based on the comparison result to obtain the target duty cycle includes: If the comparison result is that the power difference is less than or equal to the preset difference, then increasing the current duty cycle to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

3. The PTC heater power control method according to claim 2, characterized in that: The step of performing value-added processing on the current duty cycle to obtain the target duty cycle includes: Get the preset value-added ratio; The current duty cycle is added to the preset value-added ratio to obtain the target duty cycle.

4. The PTC heater power control method according to claim 2, characterized in that: The step of performing a deduction process on the current duty cycle to obtain the target duty cycle includes: Obtain the preset impairment ratio; The target duty cycle is obtained by subtracting the current duty cycle from the preset decrement ratio.

5. The PTC heater power control method according to claim 1, characterized in that: The change trend of the preset waveform is a continuous waveform.

6. The PTC heater power control method according to claim 1, characterized in that: The multiple sampling values ​​include multiple voltage sampling values ​​and multiple current sampling values; the performing a preset calculation process on the multiple sampling values ​​to obtain the current power value includes: Performing mean processing on the multiple voltage sampling values ​​to obtain an average voltage sampling value, and performing mean processing on the multiple current sampling values ​​to obtain an average current sampling value; The average voltage sampling value and the average current sampling value are calculated and processed to obtain the current power value.

7. A PTC heater power control device, characterized in that: The device is configured in a controller of a PTC heater power control system, the PTC heater power control system includes an IGBT component, an LC circuit and a PTC heater, a sampling circuit and a vehicle battery pack, the controller is connected to the IGBT component and the sampling circuit for communication, the LC circuit is connected to the IGBT component and the PTC heater for communication, the sampling circuit is also connected to the PTC heater for communication, and the vehicle battery pack is electrically connected to the IGBT component; the device includes: A sampling unit, controlling the sampling circuit to sample the PTC heater to obtain a plurality of sampling values; A first calculation unit performs a preset calculation process on the plurality of sampling values ​​to obtain a current power value; A second calculation unit, performing a difference calculation based on the acquired target power value and the current power value to obtain a power difference value; A comparison unit, which compares the power difference with a preset difference to obtain a comparison result; an adjusting unit, which adjusts the current duty cycle based on the comparison result to obtain a target duty cycle; The control unit, for the vehicle battery pack, has the IGBT component perform continuous power control processing to the LC circuit according to the target duty cycle, so that the LC circuit can adjust the average voltage value of the PTC heater in each first preset cycle in real time, and the DC voltage of the PTC heater in each first preset cycle forms a preset waveform, thereby realizing power control of the PTC heater.

8. The PTC heater power control device according to claim 7, characterized in that: The adjusting the current duty cycle based on the comparison result to obtain the target duty cycle includes: If the comparison result is that the power difference is less than the preset difference, the current duty cycle is incremented to obtain the target duty cycle; or If the comparison result is that the power difference is greater than the preset difference, the current duty cycle is subtracted to obtain the target duty cycle.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the PTC heater power control method according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the PTC heater power control method according to any one of claims 1 to 6.

Images