CN111959347B - Control method of parking heater for battery pack - Google Patents
Control method of parking heater for battery pack Download PDFInfo
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- CN111959347B CN111959347B CN202010812986.8A CN202010812986A CN111959347B CN 111959347 B CN111959347 B CN 111959347B CN 202010812986 A CN202010812986 A CN 202010812986A CN 111959347 B CN111959347 B CN 111959347B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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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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- 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
- H01M10/635—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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a control method of a parking heater for a battery pack, which is characterized by comprising the following steps: the method comprises the following steps: 1) after the parking heater is powered on, entering an initialization state and waiting for a starting signal; 2) after receiving the starting signal, controlling the parking heater to enter a starting state, and controlling the heating match to start electrifying to enter a preheating state; 3) after preheating is finished, controlling a fuel pump to start oil injection and simultaneously controlling an air inlet fan to start working; 4) and judging whether the parking heater is started or not, and controlling the parking heater to enter a full-load working state after the parking heater is started. The purpose of shortening the starting time of the heater is achieved by controlling the cooperative work of the heating plug, the fuel pump and the air inlet fan, and the defect of black smoke emission during starting can be further controlled and reduced.
Description
Technical Field
The invention relates to the field of temperature control of automobile battery packs, in particular to a control method of a parking heater for a battery pack.
Background
At present, a parking heater is widely used for warming a cab and preheating an engine cooling system in a low-temperature environment on the vehicle types such as a truck, a passenger car, a motor home and the like, so that the problem of difficulty in cold start of the engine is solved, and the emission of cold start is reduced.
Under the severe cold environment of polar region, the very low discharge current of battery package temperature receives very big restriction, and electric heating thermal management system performance also can receive very big restriction, can do benefit to parking heater and replace electric heating system for electric motor car battery package coolant liquid heating, can make battery package temperature rise as fast as possible reach normal discharge power, improve electric motor car startability to can improve the continuation of the journey mileage of whole car under extremely cold temperature by a wide margin. But the problem that the current parking heater ubiquitous start-up time overlength and start and emit black cigarette is unfavorable for cooling system rapid heating up under extremely cold weather, brings not good experience for the driver.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control method of a parking heater for a battery pack, which achieves the purpose of shortening the starting time of the heater and further can control and reduce the defect of black smoke during starting by controlling the cooperative work of a heating plug, a fuel pump and an air inlet fan.
In order to achieve the purpose, the invention adopts the technical scheme that: a control method of a parking heater for a battery pack includes the steps of:
1) after the parking heater is powered on, entering an initialization state and waiting for a starting signal;
2) after receiving the starting signal, controlling the parking heater to enter a starting state, and controlling the heating plug to start electrifying to enter a preheating state at the moment;
3) after preheating is finished, controlling a fuel pump to start oil injection and simultaneously controlling an air inlet fan to start working;
4) and judging whether the parking heater is started or not, and controlling the parking heater to enter a full-load working state after the parking heater is started.
And in step 3), when the fuel pump is controlled to start fuel injection, the fuel pump injects fuel at a low-frequency fuel injection frequency, and the air inlet fan is controlled to work at a low rotating speed.
In step 4), the method for determining completion of activation of the parking heater includes: the exhaust temperature data of the combustion chamber of the parking heater is detected through the exhaust temperature sensor, whether the parking heater is started or not is judged according to the temperature data, and when the temperature rising rate is larger than a set temperature rate threshold value, the parking heater is judged to be started.
And after the parking heater is judged to be started completely in the step 4), the heating plug is controlled to be closed.
In step 4, controlling the parking heater to enter the full load operating state after the completion of the start-up includes: and controlling the oil injection frequency and the rotating speed of the fan to be slowly increased to a frequency calibration value and a rotating speed calibration value corresponding to the full load respectively.
Step 4), after the parking heater is controlled to enter a full-load working state, monitoring the temperature of cooling liquid heated by the parking heater, and after the temperature of the cooling liquid is greater than a cooling liquid temperature calibration value, controlling the parking heater to enter a low-load working state, and controlling the oil injection frequency and the rotating speed of the fan to be slowly reduced to a frequency calibration value and a rotating speed calibration value corresponding to the low load; and when the temperature of the cooling liquid is less than the low-temperature calibration value, controlling the parking heater to enter a full-load working state.
After the parking heater enters a low-load state, if the temperature of the cooling liquid continuously rises to exceed a high-temperature limit calibration value, the heater enters an automatic closing state, at the moment, the oil injector stops injecting oil, the fan slowly passes to a lower rotating speed to radiate heat of the heater, and the rotating speed is kept to work continuously; after the heater enters the automatic closing state, the heater enters the starting state again after the temperature is lower than the low-temperature limit calibration value.
If a shutdown signal or a secondary fault signal is received in the working process of the heater, a normal shutdown process is carried out: the heater enters a closed state, the oil injector stops injecting oil, and the fan slowly and excessively rotates to a high rotating speed and continuously works for a period of time and then is closed.
If three-level faults occur in the working period of the parking heater, the process is immediately closed: at the moment, the fuel injector and the fan are controlled to stop working immediately, and the heater can be powered on again only after the fault is removed, so that the fuel injector and the fan can be operated again.
The invention has the advantages that: the temperature of the cooling liquid in the vehicle-mounted battery heating system is heated by the parking heater, so that the starting work of the automobile under a cold condition can be better realized, the parking heater can be favorable for heating the cooling liquid of the battery pack of the electric vehicle instead of an electric heating system, the temperature of the battery pack can be increased as fast as possible to reach the normal discharge power, the starting performance of the electric vehicle is improved, and the cruising mileage of the whole vehicle at an extremely cold temperature can be greatly improved; meanwhile, the defect that the starting time is slow when the parking heater is started is overcome, and the purpose of quickly starting and shortening the starting time is achieved by controlling the cooperative work of the heating plug, the fuel pump and the air inlet fan through software; and reach the defect that reduces the smoking when starting through the collaborative work through control heating stopper, fuel pump, air intake fan for the parking heater starts more reliably and promotes user experience.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic diagram of a control logic of the parking heater.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The invention aims at the defects that when the parking heater is used for heating the cooling liquid in the battery heating system, the starting time of the heater is slow and dense smoke is generated, and the starting time of the heater is shortened and the black smoke generated during starting is reduced by controlling the starting of the heater. Meanwhile, a set of control method is provided for the temperature of the cooling liquid to heat the cooling liquid, so that the cooling liquid in a power battery heating system of the automobile can be heated more quickly in cold weather, and the automobile can be better adapted to quick start and use in cold weather.
The battery package possesses battery heating system in this application, contains in this system with owing to carry out the coolant liquid that heats and the heating tube who corresponds to the battery package, and this application heats the coolant liquid through the parking heater, can reduce the unable reliable operation of the electric automobile that the unable rapid heating of battery caused under the extremely cold weather.
As shown in fig. 1, a control method of a parking heater for a battery pack includes the steps of:
1. when the parking heater is electrified, the parking heater enters an initialization state and waits for receiving a control signal all the time, and when a heater starting signal is received, the parking heater firstly enters a heater starting state, and at the moment, the heating plug starts to be electrified and preheated, the preheating aims at heating a combustion chamber, fuel oil atomization is facilitated, and the heating plug can ignite mixed gas in the shortest time under a low-temperature environment, so that the starting time is shortened; after the preheating is completed, the next step is carried out, and the preheating completion generally means that the preheating of the heating plug reaches a certain temperature (can be set) or the preheating time reaches a set time (can be set).
2. After preheating is finished, the fuel pump is controlled to start fuel injection, in order to reduce the situation of black smoke emission in the starting process, fuel injection is just started to start to perform fuel injection at a lower fuel injection frequency (a specific fuel injection frequency value with a low frequency can be set and can be calibrated), the air inlet fan also works at a lower rotating speed (the rotating speed of the fan can be calibrated, and a specific rotating speed value with a low rotating speed is calibrated according to actual conditions), so that the situation of black smoke emission caused by over-concentration of mixed gas can be effectively prevented, and the heating plug is continuously heated during the period.
3. When the exhaust temperature sensor detects the rapid temperature rise (the exhaust temperature sensor is used for detecting the exhaust temperature (detecting the temperature of the exhausted combustion exhaust gas), the rapid temperature rise can be judged according to the temperature rise rate, a rise rate threshold value is set, when the rise rate is larger than the set threshold value, the rapid temperature rise is considered, the rise rate refers to the temperature rising in unit time, the fuel oil is judged to start to burn, then the heating plug is controlled to close, the heater enters the full-load working state, the fuel injection frequency and the fan rotating speed are slowly raised to the fuel injection frequency calibration value and the rotating speed calibration value (the fuel injection frequency calibration value in the full-load state and the rotating speed calibration value in the full-load state are calibrated/set according to the actual working requirements) in the full-load working state, closed-loop control can be formed by adding the exhaust temperature sensor, whether the fuel oil starts to burn or not is judged in the shortest time, and the starting time of the heater is shortened.
Controlling the parking heater to enter a full load operating state after the completion of the starting includes: and controlling the oil injection frequency and the rotating speed of the fan to be slowly increased to a frequency calibration value and a rotating speed calibration value corresponding to the full load respectively.
After the parking heater is controlled to enter a full-load working state, monitoring the temperature of cooling liquid heated by the parking heater, and when the temperature of the cooling liquid is greater than a cooling liquid temperature calibration value, controlling the parking heater to enter a low-load working state, and controlling the oil injection frequency and the rotating speed of the fan to be slowly reduced to a frequency calibration value and a rotating speed calibration value corresponding to the low load; and when the temperature of the cooling liquid is less than the low-temperature calibration value, controlling the parking heater to enter a full-load working state. The low temperature calibration value and the cooling liquid temperature calibration value can be set according to requirements and can be generally set to be the same numerical value, so that the continuous working of the heater can be realized, and the cooling liquid temperature is controlled to be kept around the calibration value as far as possible. That is, when the temperature of the cooling liquid is greater than the calibrated value, the heater enters a low-load working state, the oil injection frequency and the rotating speed of the fan are slowly reduced to the calibrated value, and the temperature of the cooling liquid is maintained. If the temperature of the cooling liquid begins to drop and is lower than the calibrated value, the heater enters the full load state again.
After the parking heater enters a low-load state, if the temperature of the cooling liquid continuously rises to exceed a high-temperature limit calibration value, the heater enters an automatic closing state, at the moment, the oil injector stops injecting oil, the fan slowly passes to a lower rotating speed to radiate heat of the heater, and the rotating speed is kept to work continuously; after the heater enters the automatic closing state, the heater enters the starting state again after the temperature is lower than the low-temperature limit calibration value. The high-temperature defined calibration value of the cooling liquid is that when the temperature is higher than the preset temperature, the temperature required by heating the battery pack is exceeded, heating is not needed at the moment, the temperature can be calibrated in a specific environment, the low-temperature defined calibration value is similar, and when the temperature is lower than the preset value, restarting is needed, so that the problem of battery performance caused by the fact that the battery cannot be heated by the refrigerating liquid is solved. That is, if the temperature of the cooling liquid is monitored to continuously rise to exceed the calibrated value after the low-load state is entered, the heater enters the automatic closing state, the oil injector stops injecting oil, the fan slowly overruns to a lower rotating speed to radiate heat to the heater, and the rotating speed is kept to continuously work. And after the heater enters an automatic closing state, when the temperature is monitored to be lower than a calibrated value, the heater enters a starting state again.
If a shutdown signal or a secondary fault is received in the working process of the heater, a normal shutdown process is carried out: and controlling the heater to enter a closed state, stopping oil injection by the oil injector, slowly enabling the fan to work at a higher rotating speed for a period of time to discharge residual waste gas and cool the heater, then closing the heater, and restarting the heater only after the fan is completely stopped working and the closing is finished. The secondary fault refers to a fault that the heater needs to be shut down, such as a heater fire fault, fuel oil is not ignited, shutdown and restart are needed, and a normal shutdown process is taken.
If three-stage failure occurs during the operation, the fuel injector and the fan stop working immediately, and the heater can be powered on again to work again only when the failure is removed. The three-level fault refers to a fault that the heater needs to be immediately turned off, a normal turn-off process is not carried out, for example, the voltage of the low-voltage storage battery is too low, and the like, and the fault needs to be immediately stopped at the moment.
The control method can well control the heater, realize good heating effect, respond to fault conditions in time and protect the heater and vehicle personnel safety, and meanwhile, the mode realizes that the heater is started quickly and simultaneously reduces the defect of smoke.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A control method of a parking heater for a battery pack is characterized in that: the method comprises the following steps:
1) after the parking heater is powered on, entering an initialization state and waiting for a starting signal;
2) after receiving the starting signal, controlling the parking heater to enter a starting state, and controlling the heating plug to start electrifying to enter a preheating state at the moment;
3) after preheating is finished, controlling a fuel pump to start oil injection and simultaneously controlling an air inlet fan to start working;
4) judging whether the parking heater is started or not, and controlling the parking heater to enter a full-load working state after the parking heater is started;
step 4) monitoring the temperature of the cooling liquid heated by the parking heater after controlling the parking heater to enter a full-load working state, and controlling the parking heater to enter a low-load working state after the temperature of the cooling liquid is greater than a cooling liquid temperature calibration value, wherein the oil injection frequency and the rotating speed of the fan are controlled to be slowly reduced to a frequency calibration value and a rotating speed calibration value corresponding to the low load; when the temperature of the cooling liquid is less than a low-temperature calibration value, controlling the parking heater to enter a full-load working state;
after the parking heater enters a low-load state, if the temperature of the cooling liquid continuously rises to exceed a high-temperature limit calibration value, the heater enters an automatic closing state, at the moment, the oil injector stops injecting oil, the fan slowly passes to a lower rotating speed to radiate heat of the heater, and the rotating speed is kept to work continuously; after the heater enters the automatic closing state, the heater enters the starting state again after the temperature is lower than the low-temperature limit calibration value.
2. The control method of a parking heater for a battery pack according to claim 1, characterized in that: and 3) controlling the fuel pump to start oil injection, wherein the fuel pump injects oil at a low-frequency oil injection frequency and the air inlet fan is controlled to work at a low rotating speed.
3. The control method of a parking heater for a battery pack according to claim 1 or 2, characterized in that: in step 4), the method for determining completion of activation of the parking heater includes: the method comprises the steps of detecting exhaust temperature data of the parking heater through an exhaust temperature sensor, judging whether the parking heater is started or not according to the temperature data, and judging whether the parking heater is started or not when the temperature rising rate is larger than a set temperature rate threshold value.
4. The control method of a parking heater for a battery pack according to claim 1 or 2, characterized in that: and after the parking heater is judged to be started completely in the step 4), the heating plug is controlled to be closed.
5. The control method of a parking heater for a battery pack according to claim 1 or 2, characterized in that: in step 4), the controlling the parking heater to enter the full-load operating state after the completion of the starting includes: and controlling the oil injection frequency and the rotating speed of the fan to be slowly increased to a frequency calibration value and a rotating speed calibration value corresponding to the full load respectively.
6. The control method of a parking heater for a battery pack according to claim 1 or 2, characterized in that: if a closing signal or a secondary fault signal is received in the working process of the heater, the heater enters a closing state, the oil injector stops injecting oil, and the fan slowly and excessively rotates to a high rotating speed and continuously works for a period of time and then is closed.
7. The control method of a parking heater for a battery pack according to claim 6, wherein: if a three-level fault occurs during the operation of the parking heater, the fuel injector and the fan are controlled to stop working immediately, and the heater is electrified again only after the fault is removed, so that the parking heater can work again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010812986.8A CN111959347B (en) | 2020-08-13 | 2020-08-13 | Control method of parking heater for battery pack |
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| CN202010812986.8A CN111959347B (en) | 2020-08-13 | 2020-08-13 | Control method of parking heater for battery pack |
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| CN111959347A CN111959347A (en) | 2020-11-20 |
| CN111959347B true CN111959347B (en) | 2022-08-26 |
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| CN114320702B (en) * | 2021-12-17 | 2023-05-16 | 中国北方发动机研究所(天津) | Air inlet heating control method for diesel engine |
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