CN112248754A - Pure electric vehicle water heating PTC heater control system and method - Google Patents
Pure electric vehicle water heating PTC heater control system and method Download PDFInfo
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- CN112248754A CN112248754A CN202011189183.8A CN202011189183A CN112248754A CN 112248754 A CN112248754 A CN 112248754A CN 202011189183 A CN202011189183 A CN 202011189183A CN 112248754 A CN112248754 A CN 112248754A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/224—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters automatic operation, e.g. control circuits or methods
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the technical field of new energy pure electric vehicles, in particular to a pure electric vehicle water heating PTC heater control system and a method, which comprises a control module and a water heating system electrically connected with the control module, wherein the control module comprises a micro-control unit, a temperature acquisition module and a power supply module which are electrically connected with the micro-control unit, the water heating system comprises a water pump, a water heating PTC heater and a warm air core body which are circulated through a water pipe, a plurality of three-way valves are arranged on the water pipe, expansion kettles which are communicated with the water pipe in parallel are communicated among all the three-way valves, and the micro-control unit is electrically connected with the water heating PTC heater through an IGBT module. The electric vehicle is beneficial to improving the endurance mileage.
Description
Technical Field
The invention relates to the technical field of new energy pure electric vehicles, in particular to a pure electric vehicle water heating PTC heater control system and method.
Background
With the development of the times, the problem of resource shortage is more and more prominent, and new energy electric automobiles in the automobile industry are produced. At present, the heating scheme of the passenger compartment of the electric automobile is mainly divided into a high-pressure PTC heating scheme and a heat pump heating scheme, and the high-pressure PTC heating scheme is divided into a wind heating PTC and a water heating PTC; the heat pump heating has the defects of high cost, low energy efficiency ratio under extreme cold conditions and incapability of meeting the heating requirement; the air-heating PTC heater has the defects of poor warm air drying comfort and potential safety hazard caused by high-pressure introduction into a cockpit;
disclosure of Invention
The invention aims to provide a pure electric vehicle water heating PTC heater control system and a pure electric vehicle water heating PTC heater control method, which aim to solve the problems in the background technology.
The technical scheme of the invention is as follows:
the utility model provides a electricelectric motor car hot-water heating PTC heater control system, including control module, with control module electric connection's hot-water heating system, control module including little the control unit, all with little the control unit electric connection's temperature acquisition module and power module, hot-water heating system is including water pump, hot-water heating PTC heater and the warm braw core that leads to pipe circulation, be provided with a plurality of three-way valve on the water pipe, the intercommunication has the expansion kettle with the parallelly connected intercommunication of water pipe between all three-way valves, little the control unit passes through IGBT module and hot-water heating PTC heater electric connection.
Furthermore, the output end of the water pump is communicated with the input end of the water heating PTC heater through the first water pipe, the output end of the water heating PTC heater is communicated with the input end of the warm air core body through the second water pipe, the output end of the warm air core body is communicated with the input end of the water pump through the third water pipe, and all the three-way valves are arranged on the third water pipe.
Furthermore, the temperature acquisition module is a temperature sensor, and the IGBT module is an insulated gate bipolar transistor.
Further, a method for controlling a water heating PTC heater control system of a pure electric vehicle comprises the following steps:
step S1: after receiving the opening instruction, the water heating PTC heater firstly detects whether high voltage is input, if no high voltage is input, the PTC heater is closed, and if high voltage is input, the step S2 is executed;
step S2: detecting the temperature of the water outlet of the water heating PTC heater, judging whether the water temperature is higher than 90 ℃, if so, turning off heating, and if not, entering the step S3;
step S3: judging whether the water temperature is higher than 50 ℃, if so, adjusting the PWM duty ratio to perform linear heating, and if not, performing full-power heating;
further, the linear heating power formula of step S3 is:
wherein: in the formula
The duty ratio of PWM during heating is obtained;
in the formula PmaxNamely the rated power of the water heating PTC heater;
in the formula, T is the water temperature of the water outlet of the heater;
t0 in the formula is the base point temperature of the water temperature judgment selected in the text, namely 50 ℃;
in the formula, Δ T is the difference between the maximum heating temperature and the base point temperature, i.e. Δ T ═ Tmax-T0＝90-50＝40℃。
Furthermore, the micro control unit is also electrically connected with a CAN bus communication module.
The invention provides a pure electric vehicle water heating PTC heater control system and a method through improvement, compared with the prior art, the pure electric vehicle water heating PTC heater control system has the following improvement and advantages:
one is as follows: the invention receives the command of opening or closing the water heating PTC heater in real time, and adjusts the PWM duty ratio by combining the detected water temperature at the water outlet of the heater, thereby realizing the linear automatic adjustment of the heating output power of the water heating PTC heater, reducing the electric energy loss of a power battery to a certain extent, and having the characteristics of quick heating and uniform temperature rise.
The second step is as follows: the invention realizes the automatic linear adjustment of the heating power corresponding to each temperature point, accurately controls the heating power of the heater, enables the warm air system to be more energy-saving, and is beneficial to improving the endurance mileage of the electric vehicle.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a schematic diagram of the working principle of the present invention;
FIG. 2 is a control block diagram of the present invention;
FIG. 3 is a schematic diagram of the operating program logic of the present invention;
FIG. 4 is a graphical illustration of the linear heating power function of the present invention;
description of the drawings:
the water heater comprises a water pump 1, a warm air core body 2, a water heating PTC heater 3, a three-way valve 4 and an expansion kettle 5.
Detailed Description
The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a pure electric vehicle water heating PTC heater control system and a method through improvement, as shown in figures 1-4, the pure electric vehicle water heating PTC heater control system comprises a control module and a water heating system electrically connected with the control module, wherein the control module comprises a micro control unit, a temperature acquisition module and a power supply module, the temperature acquisition module and the power supply module are electrically connected with the micro control unit, the water heating system comprises a water pump 1, a water heating PTC heater 3 and a warm air core body 2 which are circulated through a water pipe, a plurality of three-way valves 4 are arranged on the water pipe, expansion kettles 5 which are communicated with the water pipe in parallel are communicated among all the three-way valves 4, and the micro control unit is electrically connected with the water heating PTC heater 3.
The water heating PTC heater 3 and the water pump 1 are added on the basis of keeping the loop of the warm air core 2 of the traditional vehicle, the specific working principle is shown in the attached drawing 1, and the water heating PTC heater is characterized in that the surface temperature of the warm air core 2 is comfortable and moderate, the comfort is good, but the common fault of an electric vehicle heating system exists, namely the electric energy consumption of a power battery is extremely high, the endurance mileage is influenced to a certain extent, and therefore, the development of the control mode of the high-efficiency and energy-saving water heating PTC heater 3 has important significance.
The output of water pump 1 is through first water pipe and hot-water heating PTC heater 3's input intercommunication, hot-water heating PTC heater 3's output passes through the input intercommunication of second water pipe and warm braw core 2, the output of warm braw core 2 passes through the input intercommunication of third water pipe and water pump 1, and all three-way valves 4 all set up on the third water pipe.
The invention comprises an MCU control module which takes a singlechip as a control core and is provided with a power supply module, an IGBT module, a temperature acquisition module and a CAN bus communication module, as shown in figure 2, the on-off state of a high-voltage power supply of the water heating PTC heater 3 is regulated and controlled through the on-off state of the IGBT, namely the heating and heating stopping working state of the heater, PWM signals are used as input signals of an IGBT driving circuit, the power of the heater is controlled through the duty ratio of the PWM signals, and thus the automatic linear regulation of the heating power of the water heating PTC heater 3 is realized, and the heating power is accurately controlled.
The MCU control module is the core of the whole control system, and is mainly used for carrying out logic analysis processing on received information and carrying out information feedback and control according to program convention, and the MCU control module is mainly used for receiving and processing temperature data fed back by the temperature detection module, judging and sending PWM (pulse width modulation) signals with adjustable duty ratio according to the acquired temperature, and further realizing the linear adjustment of the heating output power of the water heating PTC heater 3.
The power module comprises a low-voltage power supply part and a high-voltage power supply part, wherein the low-voltage power supply part is mainly used for providing working voltage for the MCU module and other chip sensors, and the high-voltage power supply part is mainly used for providing a direct-current high-voltage power supply for the IGBT driving circuit to heat the PTC.
The temperature acquisition module is a temperature sensor, the IGBT module is an insulated gate bipolar transistor, the IGBT module is a voltage-driven power transistor, when the received PWM signal is at a high level, the IGBT is conducted, and a high-voltage power supply is loaded to the PTC to perform heating work; when the received PWM signal is at a low level, the IGBT is cut off, and the high-voltage power supply loaded on the PTC is cut off to stop heating.
The temperature acquisition module mainly refers to an NTC temperature sensor at the water outlet of the water heating PTC heater 3, the temperature corresponding to the resistance value measured by the NTC thermistor is fed back to the MCU controller module by utilizing the characteristic that the resistance value rapidly drops along with the temperature rise of the NTC thermistor under certain measurement power, and the MCU adjusts the heating power or controls the working state of the heater according to the acquired temperature.
The specific implementation manner of the linear adjustment heating power provided by the invention is shown in the attached figure 3, after receiving a starting instruction, the water heating PTC heater 3 firstly detects whether a high voltage is input, if no high voltage exists, the PTC heater is closed, and if the high voltage is input, the temperature of the water outlet of the water heating PTC heater 3 is detected:
if the water temperature T is more than 90 ℃, the heating is closed;
if the water temperature T is less than 50 ℃, full-power heating is carried out, and the temperature can be quickly raised;
if the water temperature is more than or equal to 50 ℃ and T is less than or equal to 90 ℃, adjusting the PWM duty ratio to carry out linear heating;
a method for a pure electric vehicle water heating PTC heater control system comprises the following steps:
step S1: after receiving the start command, the water heating PTC heater 3 first detects whether there is a high voltage input, if there is no high voltage input, the PTC heater is turned off, if there is a high voltage input, the process goes to step S2;
step S2: detecting the temperature of the water outlet of the water heating PTC heater 3, judging whether the water temperature is higher than 90 ℃, if so, turning off heating, and if not, entering step S3;
step S3: judging whether the water temperature is higher than 50 ℃, if so, adjusting the PWM duty ratio to perform linear heating, and if not, performing full-power heating; as shown in fig. 3;
the linear heating power formula of step S3 is:
wherein: in the formula
The duty ratio of PWM during heating is obtained;
in the formula PmaxNamely the rated power of the water heating PTC heater 3;
in the formula, T is the water temperature of the water outlet of the heater;
t0 in the formula is the base point temperature of the water temperature judgment selected in the text, namely 50 ℃;
in the formula, Δ T is the difference between the maximum heating temperature and the base point temperature, i.e. Δ T ═ Tmax-T0＝90-50＝40℃。
The control scheme provided by the invention can realize the linear regulation of the heating power of the water heating PTC heater 3, can reduce the electric energy loss of the power battery to a certain extent, and has the characteristics of quick heating and slow and uniform temperature rise.
The micro control unit is also electrically connected with a CAN bus communication module, the CAN bus communication module is a serial communication field bus, any node on the bus CAN be used as a host or a slave, data CAN be sent to other nodes at any time, a mode of simultaneously working a plurality of hosts is supported, and the CAN communication function CAN be used as a bridge for communicating with a VCU (vehicle control unit) or a CLM (air conditioner control panel).
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a pure electric motor car hot-water heating PTC heater control system which characterized in that: including control module, with control module electric connection's hot-water heating system, control module including little the control unit, all with little the control unit electric connection's temperature acquisition module and power module, hot-water heating system is including water pump (1), hot-water heating PTC heater (3) and warm braw core (2) that lead to the pipe circulation, be provided with a plurality of three-way valve (4) on the water pipe, the intercommunication has expansion kettle (5) with the parallelly connected intercommunication of water pipe between all three-way valve (4), little the control unit passes through IGBT module and hot-water heating PTC heater (3) electric connection.
2. The pure electric vehicle water heating PTC heater control system and method according to claim 1, characterized in that: the output of water pump (1) is through the input intercommunication of first water pipe with hot-water heating PTC heater (3), the output of hot-water heating PTC heater (3) is through the input intercommunication of second water pipe with warm braw core (2), the output of warm braw core (2) is through the input intercommunication of third water pipe with water pump (1), and all three-way valves (4) all set up on the third water pipe.
3. The pure electric vehicle water heating PTC heater control system and method according to claim 1, characterized in that: the temperature acquisition module is a temperature sensor, and the IGBT module is an insulated gate bipolar transistor.
4. A method of a pure electric vehicle water heating PTC heater control system according to claims 1-3, characterized in that: the method comprises the following steps:
step S1: after receiving the opening instruction, the water heating PTC heater (3) firstly detects whether high voltage is input, if no high voltage is input, the PTC heater is closed, and if high voltage is input, the step S2 is executed;
step S2: detecting the temperature of the water outlet of the water heating PTC heater (3), judging whether the water temperature is higher than 90 ℃, if so, turning off heating, and if not, entering step S3;
step S3: and judging whether the water temperature is higher than 50 ℃, adjusting the PWM duty ratio to perform linear heating if the water temperature is higher than 50 ℃, and performing full-power heating if the water temperature is lower than 50 ℃.
5. A method of a pure electric vehicle water heating PTC heater control system according to claim 4, characterized in that: the linear heating power formula of step S3 is:
wherein: in the formula
The duty ratio of PWM during heating is obtained;
in the formula PmaxNamely the rated power of the water heating PTC heater (3);
in the formula, T is the water temperature of the water outlet of the heater;
t0 in the formula is the base point temperature of the water temperature judgment selected in the text, namely 50 ℃;
in the formula, delta T is the maximum heating temperature and the base point temperature selected in the textThe difference in degrees, i.e. Δ T ═ Tmax-T0＝90-50＝40℃。
6. A method of a pure electric vehicle water heating PTC heater control system according to claim 5, characterized in that: the micro control unit is also electrically connected with a CAN bus communication module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011189183.8A CN112248754A (en) | 2020-10-30 | 2020-10-30 | Pure electric vehicle water heating PTC heater control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011189183.8A CN112248754A (en) | 2020-10-30 | 2020-10-30 | Pure electric vehicle water heating PTC heater control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023026871A1 (en) * | 2021-08-24 | 2023-03-02 | 株式会社ヴァレオジャパン | Heating control device and control program, fluid heating unit, heating cycle device, and vehicle air conditioning device comprising same |
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| CN111342081A (en) * | 2020-03-04 | 2020-06-26 | 广西玉柴机器股份有限公司 | Waste heat management system of fuel cell |
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2020
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Patent Citations (7)
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| CN1600589A (en) * | 2003-09-22 | 2005-03-30 | 凯特姆两合公司 | Electric heating apparatus with integrated temperature sensor |
| CN102529641A (en) * | 2011-11-15 | 2012-07-04 | 中国第一汽车集团公司新能源汽车分公司 | Automobile warm air control method and automobile warm air control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023026871A1 (en) * | 2021-08-24 | 2023-03-02 | 株式会社ヴァレオジャパン | Heating control device and control program, fluid heating unit, heating cycle device, and vehicle air conditioning device comprising same |
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Application publication date: 20210122 |
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