CN111799530A - Heater power closed-loop control system and power closed-loop control method - Google Patents
Heater power closed-loop control system and power closed-loop control method Download PDFInfo
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- CN111799530A CN111799530A CN202010700097.2A CN202010700097A CN111799530A CN 111799530 A CN111799530 A CN 111799530A CN 202010700097 A CN202010700097 A CN 202010700097A CN 111799530 A CN111799530 A CN 111799530A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a heater power closed-loop control system and a power closed-loop control method, wherein the power closed-loop control method is combined with the relationship between the duty ratio of a control signal and the output actual power, on one hand, the actual power of a heater in work is collected in real time, the absolute value of the difference between the actual power and the target power is calculated, on the other hand, the absolute value is compared with a set value, and the duty ratio of the current control signal is correspondingly adjusted according to the comparison result, so that the actual power and the target power output in the next signal period gradually approach, and finally, the closed-loop control and the stepless adjustment of the power output are realized.
Description
Technical Field
The invention relates to the field of new energy automobile control, in particular to a heater power closed-loop control system and a power closed-loop control method.
Background
Compared with the traditional vehicle, the new energy vehicle has great difference in the whole structure design, the new energy vehicle has no engine, is driven by a motor, has power energy from a high-voltage battery pack, has poor activity at low temperature, and needs to be subjected to heat management in order to enable the high-voltage battery to be in a good working state; in addition, the heating of new energy automobile passenger compartment also needs heat energy winter, therefore, the heater just can turn into at the same time. The new energy automobile has high temperature precision requirement, and the heater is required to quickly respond to the temperature requirement, so the power output control method of the heater is particularly important for meeting the temperature requirement of the whole automobile. Conventional control methods for the power output of the heater, which are typically open loop controls, do not allow fine adjustments to the power output.
Disclosure of Invention
In order to solve the problem that the open-loop control method cannot finely adjust the power output, the invention provides a closed-loop control system and a closed-loop control method for the power output of a heater, which can realize closed-loop control, and have the advantages of low cost, high control precision and high response speed.
In order to achieve the above object, the present invention adopts the following technical solution, a heater power closed-loop control system, comprising:
the sampling module is used for acquiring the actual power of a heating body in the heater in real time;
the calculating unit is used for calculating the absolute value of the difference value between the actual power and the target power according to the actual power and the set target power, and is connected with the sampling module;
the first judgment unit is used for comparing the absolute value with a first set increment and is connected with the calculation unit;
a second judging unit, configured to compare the absolute value with a second set increment, where the second judging unit is connected to the calculating unit and the first judging unit;
and the signal output unit is used for sending a control signal to enable the heating element to work, carrying out coarse adjustment and fine adjustment on the duty ratio of the current control signal according to the trend that the actual power approaches the target power when the absolute value is larger than or equal to the first set increment and when the absolute value is smaller than the first set increment and larger than the second set increment, sending out the adjusted control signal as a control signal of the next signal period, and is connected with the first judgment unit and the second judgment unit.
The power closed-loop control system can realize closed-loop control and stepless regulation of power output, has low cost, high control precision and high response speed, and can meet the requirement of the whole vehicle on temperature.
The invention further improves the heater power closed-loop control system: a first adjustment amount for coarse adjustment and a second adjustment amount for fine adjustment are arranged in the signal output unit, the first adjustment amount is 2% of one signal period, and the second adjustment amount is 0.5% of one signal period.
The invention further improves the heater power closed-loop control system: the first set increment is greater than the accuracy of the heater and the second set increment is less than the accuracy of the heater.
The invention further improves the heater power closed-loop control system: the first set increment is 4% of the rated power of the heater and the second set increment is 1.4% of the rated power of the heater.
The invention further improves the heater power closed-loop control system: the heater comprises a plurality of heating elements, and the power closed-loop control system comprises a plurality of sampling modules, a plurality of calculating units, a plurality of first judging units, a plurality of second judging units and a plurality of signal output units, wherein the sampling modules correspond to the heating elements one to one.
The invention also provides a heater power closed-loop control method, which comprises the following steps:
s1, sending a control signal to the heater to enable the heating element of the heater to start working;
s2, acquiring the actual power of the heating element in real time in the working process of the heating element, and calculating the absolute value of the difference between the actual power and the target power according to the actual power and the set target power;
s3, comparing the absolute value with a first set increment:
when the absolute value is larger than or equal to the first set increment, roughly adjusting the duty ratio of the current control signal according to the trend that the actual power approaches the target power, and returning to the step S1;
when the absolute value is less than the first set increment, comparing the absolute value to a second set increment:
when the absolute value is smaller than the first set increment and larger than the second set increment, finely adjusting the duty ratio of the current control signal according to the trend that the actual power approaches the target power, and returning to the step S1;
when the absolute value is equal to or smaller than the second set increment, the process returns to step S1.
The power closed-loop control method of the invention acquires the actual power of the PTC heater in operation in real time, calculates the difference absolute value between the actual power and the target power, compares the absolute value with a set value, and correspondingly adjusts the duty ratio of the current control signal according to the comparison result, so that the actual power and the target power output in the next signal period gradually approach each other, and finally realizes the closed-loop control and the stepless adjustment of the power output.
A further improvement of the heater power closed loop control method of the present invention is that, in step S3:
roughly adjusting the duty ratio of the current control signal to increase or decrease the duty ratio of the current control signal by 2% of a signal period;
and the duty ratio of the current control signal is finely adjusted by increasing or decreasing the duty ratio of the current control signal by 0.5% of a signal period.
The invention further improves the heater power closed-loop control method in that: the first set increment is greater than the accuracy of the heater and the second set increment is less than the accuracy of the heater.
The invention further improves the heater power closed-loop control method in that: the first set increment is 4% of the rated power of the heater and the second set increment is 1.4% of the rated power of the heater.
The invention further improves the heater power closed-loop control method in that: the heater includes a plurality of the heat-generating bodies, and in the step S1, a plurality of control signals, which are in one-to-one correspondence with the plurality of the heat-generating bodies and have a phase difference therebetween, are simultaneously sent to the heater.
Drawings
FIG. 1 is a schematic diagram of a closed loop control system for heater power in accordance with the present invention.
FIG. 2 is a flow chart of a heater power closed-loop control method of the present invention.
FIG. 3 is a waveform diagram of a control signal A when the duty ratio is adjusted in the heater power closed-loop control method of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The new energy automobile has high requirement on temperature precision, and the heater is required to quickly respond to the temperature requirement, so the power output control method of the heater is particularly important for meeting the temperature requirement of the whole automobile. Conventional control methods for the power output of the heater, which are typically open loop controls, do not allow fine adjustments to the power output.
Aiming at the problems, the invention provides a heater power closed-loop control system and a power closed-loop control method, which can realize closed-loop control, and have the advantages of low cost, high control precision and high response speed.
The heater power closed loop control system of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, a heater power closed loop control system includes:
the sampling module is used for acquiring the actual power of a heating element PTC in the heater in real time;
the calculating unit is used for calculating the absolute value of the difference value between the actual power and the target power according to the actual power and the set target power, and is connected with the sampling module;
the first judging unit is used for comparing the absolute value with a first set increment and is connected with the calculating unit;
the second judging unit is used for comparing the absolute value with a second set increment, and the second judging unit is connected with the calculating unit and the first judging unit;
and the signal output unit is used for sending a control signal to enable the heating element to work, carrying out coarse adjustment and fine adjustment on the duty ratio of the current control signal according to the trend that the actual power approaches the target power when the absolute value is larger than or equal to the first set increment and when the absolute value is smaller than the first set increment and larger than the second set increment, sending out the adjusted control signal as a control signal of the next signal period, and is connected with the first judgment unit and the second judgment unit.
In this embodiment, the heater includes a heating element PTC, a driving transistor IGBT, one end of the heating element PTC is connected to a high voltage power supply HV +, the other end is connected to a collector of the driving transistor IGBT, the calculating unit, the first judging unit, the second judging unit and the signal output unit are all integrated on a microcontroller, the microcontroller may be a single chip microcomputer, a control chip or a PCB board, etc., the microcontroller outputs a control signal a to a base of the driving transistor IGBT through the signal output unit, the control signal a is a square wave signal with a certain duty ratio, and a derivative of a frequency of the control signal a is a signal period; the sampling module can be in various forms, such as a power meter or a multifunctional meter, and directly collects the actual power output by the PTC of the heating element; or the combination of a voltmeter, an ammeter and a calculation module, the working voltage of the heating element PTC is collected through the voltmeter, the working current of the heating element PTC is collected through the ammeter, then the actual power of the heating element PTC is calculated through the calculation module according to the working voltage and the working current, and the calculation formula is as follows:
P＝U*I (1)
note: p is the actual power output when the heating element PTC works, U is the working voltage of the heating element PTC, and I is the working current of the heating element PTC.
The power closed-loop control system of the embodiment collects the actual power of the heater in work in real time and calculates the absolute value of the difference between the actual power and the target power, and compares the absolute value with a set value, and correspondingly adjusts the duty ratio of the current control signal according to the comparison result, so that the actual power and the target power output in the next signal period gradually approach each other, and finally, the closed-loop control and the stepless adjustment of the power output are realized.
Preferably: the signal output unit is internally provided with a first adjustment amount for coarse adjustment and a second adjustment amount for fine adjustment, wherein the first adjustment amount is 2% of one signal period, and the second adjustment amount is 0.5% of one signal period.
Through the arrangement, the adjusting speed of the power closed-loop control system is higher, and the requirement of the whole vehicle on the temperature can be met.
Preferably: in order to make the adjustment accuracy of the closed power control system meet the accuracy requirement of the heater, the embodiment preferably has the first set increment larger than the accuracy of the heater and the second set increment smaller than the accuracy of the heater.
Preferably: the higher accuracy requirement of the conventional heater is usually 2% of the rated power, therefore, the embodiment preferably selects the first set increment to be 4% of the rated power of the heater, and the second set increment to be 1.4% of the rated power of the heater, so that the power closed-loop control system can meet the accuracy requirement of the heater and ensure the adjustment speed of the output power.
Preferably: the heater comprises a plurality of heating elements PTC, and the power closed-loop control system comprises a plurality of sampling modules, a plurality of calculating units, a plurality of first judging units, a plurality of second judging units and a plurality of signal output units, wherein the sampling modules correspond to the heating elements PTC one to one.
The power closed-loop control system of the embodiment can independently sample and control each circuit of the heating element circuit, so as to realize the closed-loop control of the output power of each circuit of the heating element circuit.
The present invention further provides a heater power closed-loop control method based on the heater power closed-loop system, and the heater power closed-loop control method of the present invention is further described in detail with reference to the accompanying drawings and the detailed description.
First, define: the rated power of the heater is P; the actual power output by the heater is P; setting the target power to be P0; the duty ratio of the control signal is D; the frequency of the control signal is f; one signal period is T (i.e., 1/f); the first proportional value is d 1; the second proportional value is d 2; the first set increment is Δ P1; the second set increment is Δ P2.
Referring to fig. 2 and 3, a method for closed-loop control of heater power includes the following steps:
step S1, sending out control signal to the heater to make the heating element of the heater start working;
step S2, collecting the actual power of the heating element during the operation of the heating element, and calculating the absolute value | P-P0| of the difference between the actual power P and the set target power P0 according to the actual power P and the set target power P0.
In step S3, the absolute value | P-P0| is compared with the first set increment Δ P1:
when | P-P0| ≧ Δ P1, coarsely adjusting the duty ratio D of the current control signal according to the trend that the actual power P approaches the target power P0, and returning to step S1;
when | P-P0| < Δ P1, the absolute value | P-P0| is compared to a second set increment Δ P2:
when Δ P2 < | P-P0| < Δ P1, fine-tuning the duty ratio D of the current control signal according to the trend that the actual power P approaches the target power P0, and returning to step S1;
when | P-P0| ≦ Δ P2, return to step S1.
The power closed-loop control method of the invention collects the actual power P of the PTC heater in operation in real time, calculates the absolute value | P-P0| of the difference between the actual power P and the target power P0, compares the absolute value | P-P0| with a set value, and correspondingly adjusts the duty ratio D of the current control signal according to the comparison result, so that the actual power P output in the next signal period T and the target power P0 gradually approach each other, and finally realizes the closed-loop control and stepless adjustment of power output.
Preferably, in step S3:
the coarse adjustment of the duty ratio D of the current control signal is to increase or decrease the duty ratio D of the current control signal by 2% of a signal period T;
the duty cycle D of the fine-tuning current control signal is to increase or decrease the duty cycle D of the current control signal by 0.5% of a signal period T.
Specifically, as shown in fig. 1, the duty ratio D of the control signal is the ratio of the turn-on time of the controlled power device IGBT within one signal period T to the whole signal period T; therefore, the method comprises the following steps: the larger the duty ratio D of the control signal is, the longer the time for which the IGBT of the controlled power device is switched on in one signal period T is, the longer the heating time of the heating element PTC in one signal period T is, and the larger the consumed actual power P is; and vice versa.
Therefore, in step S3, the microcontroller adjusts the duty ratio D of the control signal by the signal adjusting unit as follows:
when | P-P0| ≧ Δ P1,
if P0-P is more than or equal to delta P1, adjusting the duty ratio D of the current control signal to D + 2% T;
if P-P0 is more than or equal to delta P1, adjusting the duty ratio D of the current control signal to D-2% T;
when Δ P2 < | P-P0| < Δ P1,
if Δ P2 < P0-P < Δ P1, adjusting the duty cycle D of the current control signal to D + 0.5% T;
if Δ P2 < P-P0 < Δ P1, adjusting the duty cycle D of the current control signal to D-0.5% T;
when the | P-P0| is less than or equal to the Δ P2,
if P0-P is less than or equal to delta P2, keeping the duty ratio D of the current control signal unchanged;
if P-P0 ≦ Δ P2, the duty cycle D of the current control signal is maintained as D.
In the present embodiment, the duty ratio D of the control signal is cyclically adjusted by using 2% T and 0.5% T as closed-loop power adjustment steps of one signal period T (e.g., 2% adjustment region and 0.5% adjustment region in fig. 3): when the actual power P is smaller than the target power P0 and is higher than the regulation upper limit critical value (namely P0-P is larger than or equal to delta P1), the duty ratio D of the control signal is cyclically increased by taking 2% T as the regulation step of one signal period T; when the actual power P is smaller than the target power P0 and is higher than the adjustment lower limit critical value (namely delta P2 is more than the P0-P is more than the delta P1), the duty ratio D of the control signal is circularly increased by taking 0.5% as the adjustment step of one signal period T, so that the actual power P and the target power P0 are gradually approximate; stopping adjusting the duty ratio D of the control signal until the actual power P is less than the target power P0 and is below the regulation lower limit critical value (P0-P is less than or equal to delta P2); the same is true for the adjustment mode that the actual power P is larger than the target power P0. The point power closed-loop control method has high control precision and high response speed.
Preferably: the first setting increment delta P1 and the second setting increment delta P2 can be determined according to the precision of the heater, the first setting increment delta P1 is larger than the precision of the heater, and the second setting increment delta P2 is smaller than the precision of the heater, so that the power closed-loop control method meets the precision requirement of the heater, and real closed-loop control and stepless speed regulation are realized.
Preferably: the first set increment Δ P1 and the second set increment Δ P2 may be determined in conjunction with the rated power P of the heater and the accuracy, according to a conventional relationship between the rated power P and the accuracy (typically a higher accuracy is 2% of the rated power P), the present embodiment prefers that the first set increment be 4% of the rated power P of the heater, i.e., Δ P1 is 4% of the rated power P; the second set increment is 1.4% of the rated power P of the heater, i.e., Δ P2 is 1.4% P. For example: the rated power Prating of the heater is 5000W (its precision is 100W), then this control method defines the first set increment Δ P1 to be 4% 5000W 200W, further defines the second set increment Δ P2 to be 1.4% 5000W 70W, at this moment, the precision of this heater is just between the first set increment Δ P1 and the second set increment Δ P2, regard first set increment Δ P1 far away from and greater than this precision value as the upper limit threshold value of regulation, regard second set increment Δ P2 close to and smaller than this precision value as the lower limit threshold value of regulation, make this control method have higher control precision and have faster response speed at the same time.
Preferably: the heater includes a plurality of the heat generating bodies, and in the step S1, a plurality of control signals corresponding to the plurality of the heat generating bodies one to one with a phase difference therebetween are simultaneously sent to the heater.
In the present embodiment, the control logics of the plurality of heating elements are the same, but phase differences are provided between the plurality of control signals for controlling the plurality of heating elements, so that the control signals are sent out simultaneously but the start pulses are asynchronous, thereby ensuring that the power devices IGBT for driving each heating element are not turned on simultaneously to suppress the inrush current.
Specifically, such as: the frequency of the control signal is 20HZ, and the period is 50 ms; when the control is 1 way, only one way is opened within 50 ms; when the control is 2-path control, two paths of starting are needed within 50ms, only one path of starting is needed within 25ms, and the other path of starting is needed within the next 25 ms; when the control is 3-way control, three ways of starting are needed within 50ms, so that only one way of starting is needed within 17ms, the other way of starting is needed within the next 17ms, and the last way of starting is needed within the next 17 ms. Although the duty ratios of the control signals are overlapped with each other as the duty ratios are increased, the control logic is not affected by the overlap.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A heater power closed loop control system, comprising:
the sampling module is used for acquiring the actual power of a heating body in the heater in real time;
the calculating unit is used for calculating the absolute value of the difference value between the actual power and the target power according to the actual power and the set target power, and is connected with the sampling module;
the first judgment unit is used for comparing the absolute value with a first set increment and is connected with the calculation unit;
a second judging unit, configured to compare the absolute value with a second set increment, where the second judging unit is connected to the calculating unit and the first judging unit;
and the signal output unit is used for sending a control signal to enable the heating element to work, carrying out coarse adjustment and fine adjustment on the duty ratio of the current control signal according to the trend that the actual power approaches the target power when the absolute value is larger than or equal to the first set increment and when the absolute value is smaller than the first set increment and larger than the second set increment, sending out the adjusted control signal as a control signal of the next signal period, and is connected with the first judgment unit and the second judgment unit.
2. The heater power closed loop control system of claim 1 wherein: a first adjustment amount for coarse adjustment and a second adjustment amount for fine adjustment are arranged in the signal output unit, the first adjustment amount is 2% of one signal period, and the second adjustment amount is 0.5% of one signal period.
3. The heater power closed loop control system of claim 1 wherein: the first set increment is greater than the accuracy of the heater and the second set increment is less than the accuracy of the heater.
4. The heater power closed loop control system of claim 1 wherein: the first set increment is 4% of the rated power of the heater and the second set increment is 1.4% of the rated power of the heater.
5. The heater power closed loop control system of claim 1 wherein: the heater comprises a plurality of heating elements, and the power closed-loop control system comprises a plurality of sampling modules, a plurality of calculating units, a plurality of first judging units, a plurality of second judging units and a plurality of signal output units, wherein the sampling modules correspond to the heating elements one to one.
6. A method for closed loop control of heater power, comprising the steps of:
s1, sending a control signal to the heater to enable the heating element of the heater to start working;
s2, acquiring the actual power of the heating element in real time in the working process of the heating element, and calculating the absolute value of the difference between the actual power and the target power according to the actual power and the set target power;
s3, comparing the absolute value with a first set increment:
when the absolute value is larger than or equal to the first set increment, roughly adjusting the duty ratio of the current control signal according to the trend that the actual power approaches the target power, and returning to the step S1;
when the absolute value is less than the first set increment, comparing the absolute value to a second set increment:
when the absolute value is smaller than the first set increment and larger than the second set increment, finely adjusting the duty ratio of the current control signal according to the trend that the actual power approaches the target power, and returning to the step S1;
when the absolute value is equal to or smaller than the second set increment, the process returns to step S1.
7. The heater power closed-loop control method according to claim 6, wherein in step S3:
roughly adjusting the duty ratio of the current control signal to increase or decrease the duty ratio of the current control signal by 2% of a signal period;
and the duty ratio of the current control signal is finely adjusted by increasing or decreasing the duty ratio of the current control signal by 0.5% of a signal period.
8. The heater power closed loop control method of claim 6, wherein: the first set increment is greater than the accuracy of the heater and the second set increment is less than the accuracy of the heater.
9. The heater power closed loop control method of claim 6, wherein: the first set increment is 4% of the rated power of the heater and the second set increment is 1.4% of the rated power of the heater.
10. The heater power closed loop control method of claim 1, wherein: the heater includes a plurality of the heat-generating bodies, and in the step S1, a plurality of control signals, which are in one-to-one correspondence with the plurality of the heat-generating bodies and have a phase difference therebetween, are simultaneously sent to the heater.
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Cited By (2)
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| CN112428876A (en) * | 2020-11-20 | 2021-03-02 | 宝能(广州)汽车研究院有限公司 | Electric vehicle charging heating control method and device, storage medium and electric vehicle |
| CN117394834A (en) * | 2023-12-08 | 2024-01-12 | 深圳和而泰汽车电子科技有限公司 | Switch tube control method, domain controller and automobile |
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| CN111086551A (en) * | 2019-11-26 | 2020-05-01 | 东方久乐汽车电子（上海）股份有限公司 | Steering wheel heating control method based on temperature closed-loop adjustment |
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| CN103576723A (en) * | 2013-11-20 | 2014-02-12 | 李高升 | Temperature control module of glass electric kettle |
| CN110580073A (en) * | 2018-06-11 | 2019-12-17 | 周小辉 | Novel experiment temperature analog control device |
| CN109578129A (en) * | 2018-12-20 | 2019-04-05 | 东风汽车集团有限公司 | A kind of engine coolant temperature control system and method |
| CN111086551A (en) * | 2019-11-26 | 2020-05-01 | 东方久乐汽车电子（上海）股份有限公司 | Steering wheel heating control method based on temperature closed-loop adjustment |
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| CN112428876A (en) * | 2020-11-20 | 2021-03-02 | 宝能(广州)汽车研究院有限公司 | Electric vehicle charging heating control method and device, storage medium and electric vehicle |
| CN117394834A (en) * | 2023-12-08 | 2024-01-12 | 深圳和而泰汽车电子科技有限公司 | Switch tube control method, domain controller and automobile |
| CN117394834B (en) * | 2023-12-08 | 2024-04-05 | 深圳和而泰汽车电子科技有限公司 | Switch tube control method, domain controller and automobile |
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