CN116691453A - Method, device and equipment for reutilizing pre-waste heat of engine after vehicle stopping and vehicle - Google Patents
Method, device and equipment for reutilizing pre-waste heat of engine after vehicle stopping and vehicle Download PDFInfo
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- CN116691453A CN116691453A CN202310797083.0A CN202310797083A CN116691453A CN 116691453 A CN116691453 A CN 116691453A CN 202310797083 A CN202310797083 A CN 202310797083A CN 116691453 A CN116691453 A CN 116691453A
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000002918 waste heat Substances 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 141
- 238000011084 recovery Methods 0.000 claims abstract description 118
- 238000004064 recycling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 13
- 238000004891 communication Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
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- 238000005265 energy consumption Methods 0.000 description 2
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- 238000012546 transfer Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- 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
- B60L2240/44—Drive Train control parameters related to combustion engines
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a method, a device, equipment and a vehicle for recycling pre-waste heat of an engine after the vehicle is stopped, when the engine is in a flameout state and a battery pack is higher than a first heating temperature, the battery pack is not required to be heated and an engine loop cannot effectively heat a heat recovery device, whether the temperature of the heat recovery device is lower than the engine temperature is continuously judged, when the temperature of the heat recovery device is lower than the engine temperature, whether the temperature of the battery pack is higher than a second preset temperature is judged, when the temperature of the heat recovery device is lower than the engine temperature, the engine loop is adopted to heat the battery pack, and when the temperature of the heat recovery device is lower than the second preset temperature, the engine waste heat is adopted to heat the battery pack, so that the battery pack can quickly reach an optimal working temperature, the output efficiency of the battery pack is improved, and the performance of the battery pack is improved while the waste of heat resources is reduced.
Description
Technical Field
The application relates to the technical field of vehicle control, in particular to a method, a device and equipment for reutilizing pre-waste heat of an engine after a vehicle is stopped and a vehicle.
Background
The current automotive industry is working to reduce the energy consumption of vehicles to accommodate the increasingly severe energy crisis, including the development of new energy vehicles and the adoption of new technologies, but often at higher cost.
The problem of host factories is always plagued by the attenuation of the endurance mileage of pure electric vehicles in winter, the heating of batteries and the heating of passenger cabins are all from the batteries, so that less energy is stored per se, the front part of the vehicle is caught up with the elbow, and therefore, how to improve the energy utilization rate of the heating of the batteries and the passenger cabins becomes the problem overcome by engineers, so that the vehicle has longer endurance mileage when the electric quantity is equal, and the vehicle has more competitiveness.
The energy-saving technology and the technology convenient for customer experience have positive effects on the energy consumption of the whole vehicle.
For the existing hybrid vehicle type, the waste heat of the engine is only used for heating the member cabin when the engine works, and a few technologies use the engine for heating the battery, but after the engine is stopped, the waste heat of the engine body is wasted, and how to fully utilize the wasted heat so as to improve the vehicle performance is one of topics continuously researched by the technicians in the field.
Disclosure of Invention
In view of the above, the embodiments of the present application provide a method, an apparatus, a device, and a vehicle for recycling engine pre-waste heat after a vehicle is stopped, so as to recycle the engine waste heat, and through these engine waste heat, the temperature of a battery pack is increased, so that the temperature of the battery pack is closer to an optimal working temperature.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
a method for reutilizing pre-waste heat of an engine after a vehicle is stopped comprises the following steps:
when the engine enters a flameout state from a starting state, judging whether the temperature of the battery pack is higher than a first heating temperature or not;
when the temperature of the battery pack is higher than the first heating temperature, judging whether the engine can heat a heat recovery device or not, wherein the heat recovery device is used for recovering heat of a vehicle;
when the engine cannot heat the heat recovery device, judging whether the temperature of the heat recovery device is higher than the temperature of the engine;
when the temperature of the heat recovery device is smaller than the temperature of the engine, judging whether the temperature of the battery pack is lower than a second heating temperature or not, wherein the second heating temperature is larger than the first heating temperature;
and when the temperature of the battery pack is lower than the second heating temperature, controlling the engine loop to heat the battery pack.
Optionally, in the method for reutilizing pre-waste heat of an engine after stopping the vehicle, when the temperature of the battery pack is lower than the first heating temperature, the engine loop is controlled to heat the battery pack.
Optionally, in the method for reutilizing pre-waste heat of an engine after stopping a vehicle, when the temperature of the heat recovery device is greater than the temperature of the engine, the method further includes:
judging whether the temperature of the battery pack is lower than a third heating temperature or not, wherein the third heating temperature is higher than the second heating temperature;
and when the temperature of the battery pack is lower than the third heating temperature, heating the battery pack by adopting the heat recovery device.
Optionally, in the method for reutilizing pre-waste heat of an engine after stopping a vehicle, when the battery pack is heated, the method further includes:
judging whether the temperature of the battery pack reaches a target temperature;
judging whether the fluctuation range of the battery pack temperature is within a target range or not;
and stopping heating the battery pack when the temperature of the battery pack reaches the target temperature or the fluctuation range is within the target range.
Optionally, in the method for recycling pre-waste heat of an engine after stopping the vehicle, after determining that the temperature of the battery pack is lower than the second heating temperature, before controlling the engine loop to heat the battery pack, the method further includes:
judging whether the water temperature of the engine is higher than a preset temperature;
and when the temperature of the engine water is higher than the preset temperature, continuing to execute the subsequent steps.
Optionally, in the method for reutilizing pre-waste heat of an engine after stopping a vehicle, after the engine enters a flameout state from a start state, before judging whether the temperature of a battery pack is higher than a first heating temperature, the method further includes:
and judging whether the current state of the vehicle meets the battery pack heating condition, and continuously executing the follow-up steps when the current state of the vehicle meets the battery pack heating condition.
Optionally, in the method for recycling pre-waste heat of an engine after stopping the vehicle, determining whether the current state of the vehicle meets the heating condition of the battery pack includes:
judging whether the environmental temperature of the vehicle is greater than a preset environmental temperature;
and/or judging whether the residual capacity of the battery pack is larger than a preset residual capacity.
An engine pre-heat recycling device after a vehicle is stopped, comprising:
the engine state monitoring unit is used for detecting whether the engine enters a flameout state from a starting state;
a first judging unit for judging whether the temperature of the battery pack is higher than a first heating temperature when the engine enters a flameout state from a start state;
a second judging unit configured to judge whether the engine can heat a heat recovery device for recovering heat from the vehicle when the battery pack temperature is higher than the first heating temperature;
a third judging unit configured to judge whether the temperature of the heat recovery device is higher than the temperature of the engine when the engine cannot heat the heat recovery device, the heat recovery device being configured to recover heat from the vehicle;
and the fourth judging unit is used for judging whether the temperature of the battery pack is lower than a second heating temperature or not when the temperature of the heat recovery device is lower than the temperature of the engine, the second heating temperature is higher than the first heating temperature, and controlling the engine loop to heat the battery pack when the temperature of the battery pack is lower than the second heating temperature.
An engine pre-waste heat recycling device after vehicle stopping comprises a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute the program to implement each step of the method for reutilizing pre-waste heat of an engine after stopping the vehicle according to any one of the above.
A vehicle is provided with the device for reutilizing the pre-waste heat of the engine after the vehicle is stopped.
Based on the above technical scheme, when the engine is turned off and the battery pack is higher than the first heating temperature, the battery pack is not required to be heated and the engine loop cannot effectively heat the heat recovery device, whether the temperature of the heat recovery device is lower than the engine temperature is continuously judged, when the temperature of the heat recovery device is lower than the engine temperature, whether the temperature of the battery pack is higher than the second preset temperature is judged, when the temperature of the heat recovery device is lower than the second preset temperature, the engine loop is adopted to heat the battery pack, and the engine waste heat is adopted to heat the battery pack so that the battery pack can quickly reach the optimal working temperature, thereby improving the output efficiency of the battery pack, reducing the heat resource waste and improving the performance of the battery pack. Compared with the prior art, the application fully utilizes the waste heat after the engine is shut down.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for reutilizing pre-waste heat of an engine after a vehicle is parked, according to an embodiment of the application;
FIG. 2 is a schematic flow chart of a method for recycling pre-heat of an engine after a vehicle is parked according to another embodiment of the present application;
FIG. 3 is a schematic flow chart of a method for recycling pre-heat of an engine after a vehicle is parked according to another embodiment of the present application;
FIG. 4 is a schematic flow chart of a method for recycling pre-heat of an engine after a vehicle is parked according to another embodiment of the present application;
FIG. 5 is a schematic flow chart of a method for recycling pre-heat of an engine after a vehicle is parked according to another embodiment of the present application;
FIG. 6 is a schematic structural diagram of an engine pre-heat recycling device after a vehicle is parked according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus for recycling pre-waste heat of an engine after a vehicle is stopped according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the scheme, in order to improve the utilization rate of recovered heat and improve the vehicle performance, the application discloses a method for recycling the pre-waste heat of an engine after the vehicle is stopped.
Specifically, the application discloses a method for reutilizing pre-waste heat of an engine after a vehicle is stopped, which is shown in fig. 1 and comprises steps S101-S105.
Step S101: when the engine enters a flameout state from a starting state, whether the temperature of the battery pack is higher than a first heating temperature or not is judged.
In this step, the engine state is detected in real time, when the engine is in a working state, the engine is in a high-temperature state after working for a period of time due to heat released during the working process of the engine, and when the engine is switched from the working state to a flameout state, a large amount of heat is accumulated on the engine, and if the heat is not processed, the heat can be automatically dissipated into the air. Of course, if the engine is in a flameout state for a predetermined period of time (for example, within 30 minutes), the engine must be in a lower temperature state, and there is no heat on the engine that can be recovered, and no subsequent action is required.
In this scheme, in order to timely and fully utilize this part of heat, the working state of the engine needs to be detected, when the engine is detected to enter a flameout state from a starting state, it is indicated that a large amount of heat is available for the engine, at this time, it is determined whether the battery pack is in a low-temperature state, and when the battery pack is in a low-temperature state, step S102 is continuously executed. In this scheme, whether the battery package is in the low temperature state can be confirmed through the mode that compares battery package temperature with first heating temperature, specifically, can set for first heating temperature in advance, first heating temperature's value can be 5 ℃, 10 ℃ or 15 ℃ etc. compare the battery package temperature who gathers with first heating temperature, when judging battery package temperature is less than first heating temperature, indicate that the battery package is in the low temperature state, have the demand of urgent intensification heating, need heat the battery package.
The heat recovery device is used for recovering heat of the vehicle, the recovered heat can include but is not limited to heat of engine exhaust, the specific expression of the heat recovery device can be a heat collection tank or other equipment capable of storing heat energy, and the heat recovery device can be used for heating a target object through a high-temperature medium stored in the heat collection tank.
Step S102: when the temperature of the battery pack is higher than the first heating temperature, judging whether the engine can heat the heat recovery device or not;
in this step, when the temperature of the battery pack is higher than the first heating temperature, the battery pack does not have an urgent heating requirement, and at this time, the recycling direction of the engine waste heat may be divided into three directions, one of which is to heat the heat recovery device, the other is to respond to the acquired heating request, and the third is to continue heating the battery pack. When the heating request is not obtained in the process, judging whether the engine can heat the heat recovery device or not, referring to fig. 2, if the engine can heat the heat recovery device, controlling the engine to heat the heat recovery device, and judging whether the temperature difference between the engine and the heat recovery device is larger than a preset temperature difference or not when judging whether the engine can heat the heat recovery device or not. If the temperature of the engine is lower than that of the heat recovery device, the engine is controlled to exchange heat with the heat recovery device, and the engine cannot transfer heat to the heat recovery device because the engine is at the lower temperature. At this time, the engine cannot heat the heat recovery device. If the temperature of the engine is higher than the heat recovery device, but the temperature difference between the engine and the heat recovery device is smaller than the preset temperature difference, the engine is controlled to perform heat exchange with the heat recovery device, the heating effect on the heat recovery device is limited, and even in the heat exchange process, certain heat dissipation can be caused due to the fact that a heat exchange medium flows in a pipeline, the temperature of the heat recovery device can possibly not rise and fall, and at the moment, the engine can be considered as incapable of heating the heat recovery device. If the temperature of the engine is higher than the heat recovery device and the temperature difference between the engine and the heat recovery device is larger than the preset temperature difference, in the state, if the engine is controlled to transfer a part of heat to the heat recovery device in the heat exchange process with the heat recovery device, the heat recovery device is in a heated state at the moment, which indicates that the engine can heat the heat recovery device, at the moment, a water pump in the heat recovery device or a water pump of the engine is controlled to work at a fixed rotating speed or to gradually increase the rotating speed, and meanwhile, an electromagnetic valve in a heat recovery pipeline between the heat recovery device and the engine is controlled to be gradually opened until the maximum opening degree, and a low-temperature medium in the heat recovery device flows through the heat recovery pipeline to the engine under the driving of the water pump to exchange heat with the engine, absorb the heat of the engine and flow back to the heat recovery device until the engine cannot effectively heat the heat recovery device, so that the heat recovery device is heated by the engine. Of course, when the engine is used for heating the heat recovery device, the high-temperature medium in the engine loop can flow to the heat recovery device under the drive of the water pump, heat exchange is carried out at the heat recovery device, and after the heat exchange is completed, the medium flows back to the engine loop, so that the engine can heat the heat recovery device. When the engine cannot heat the heat recovery device, at this time, it may be further determined whether the battery pack has a need to continue heating, and step S103 is executed at this time;
step S103: and judging whether the temperature of the heat recovery device is higher than the temperature of the engine, wherein the heat recovery device is used for recovering heat of the vehicle.
In this case, the heat source is mainly selected to select whether to use the engine circuit or the heat recovery device to heat the battery pack, and in this case, the higher temperature side is preferably selected as the heat source, so that it is necessary to determine in advance whether the heat recovery device temperature is higher than the engine temperature.
Step S104: and when the temperature of the heat recovery device is smaller than the temperature of the engine, judging whether the temperature of the battery pack is lower than a second heating temperature, wherein the second heating temperature is larger than the first heating temperature.
Generally, when the engine is just flameout, the temperature of the engine is higher than the temperature of the heat recovery device, and at this time, the temperature of the battery pack is in a state with lower temperature, the engine temperature gradually decreases, the temperature of the battery pack gradually increases, in this process, the battery pack has a certain heating requirement, in this time period, because the engine temperature is higher, the heating speed of the engine loop is higher than the heating speed of the heat recovery device, therefore, when the temperature of the heat recovery device is lower than the engine temperature, the engine loop is preferentially adopted to heat the battery pack, that is, in this step, when the temperature of the heat recovery device is lower than the engine temperature, the engine waste heat is indicated to be higher, at this time, the engine loop is preferentially adopted to heat the battery pack, whether the battery pack temperature is lower than the second heating temperature is firstly judged, the value of the second heating temperature is higher than the first heating temperature, the value of the second heating temperature is lower than the third heating temperature in the following, the second heating temperature is lower than the third heating temperature, the specific value of the battery pack can be 20 ℃, 25 ℃, 30 ℃ or the third heating temperature, as long as the battery pack temperature is lower than the second heating temperature, in this time, the engine loop is not required to heat the engine loop, the engine loop can be adopted, the engine loop can be heated, the engine heat is not required to heat, and the engine heat is not required to be recovered, and the engine heat is required to be recovered when the engine heat is higher than the second heating temperature, for the engine temperature, for example, and the engine is required to heat has a special heating condition, and the engine has a high temperature.
Step S105: and when the temperature of the battery pack is lower than the second heating temperature, controlling the engine loop to heat the battery pack.
In this step, when the temperature of the battery pack is detected to be lower than the second heating temperature, it is indicated that the battery pack has a certain temperature, but the difference between the optimal working temperatures corresponding to the highest working efficiency of the battery pack is large, the battery pack is difficult to quickly reach the optimal working temperature, and the battery pack still has a heating requirement, so that the engine loop needs to be controlled to heat the battery pack. Referring to fig. 2, if the battery pack temperature is higher than the second heating temperature, it is indicated that the battery pack itself is high in temperature, and the battery pack itself can be rapidly warmed up to the optimal operating temperature when operating, at which time the flow may be ended.
In this scheme, a first battery pack heating loop may be configured between a battery pack and an engine loop, where the first battery pack heating loop is configured with an electromagnetic valve, the on-off state of the first battery pack heating loop is controlled by the electromagnetic valve, the larger the opening of the electromagnetic valve is, the larger the medium flow in the first battery pack heating loop is, the faster the temperature rising speed of the battery pack is, in this scheme, when the engine loop is controlled to heat the battery pack, the electromagnetic valve may be controlled to enter the initial opening first, then the opening step of the electromagnetic valve is controlled based on the temperature difference between a heat source (engine loop or heat recovery device) and the battery pack, the larger the temperature difference is, the larger the opening step of the electromagnetic valve is, the shorter the time for the electromagnetic valve to reach full open from the initial opening is, and by gradually controlling the opening angle of the electromagnetic valve, the temperature change of the power battery is not too severe, so that the temperature rising speed of the battery pack is controllable.
According to the technical scheme disclosed by the embodiment of the application, when the engine is shut down and the battery pack is higher than the first heating temperature, the battery pack is not required to be heated and the engine loop cannot effectively heat the heat recovery device, whether the temperature of the heat recovery device is lower than the engine temperature is continuously judged, when the temperature of the heat recovery device is lower than the engine temperature, whether the temperature of the battery pack is higher than the second preset temperature is judged, when the temperature of the heat recovery device is lower than the second preset temperature, the engine loop is adopted to heat the battery pack, and the engine waste heat is adopted to heat the battery pack so that the battery pack can quickly reach the optimal working temperature, thereby improving the output efficiency of the battery pack, reducing the heat resource waste and improving the performance of the battery pack.
In this embodiment, referring to fig. 2, when the temperature of the battery pack is lower than the first heating temperature in the above-mentioned method in step S101, it is indicated that the battery pack is in a low temperature state, and the battery pack needs to be heated rapidly, so, referring to fig. 2, the battery pack may be heated directly by using an engine circuit, when heating is started, the battery water pump or the engine water pump is controlled to work at a constant rotation speed or to increase the rotation speed gradually, then the electromagnetic valve in the heating circuit of the first battery pack is controlled to be opened gradually, the high temperature medium in the engine circuit flows to the battery pack, and the battery pack absorbs the heat of the high temperature medium flowing through a part of the battery pack, so as to increase the temperature of the battery pack.
Here, the engine loop can be directly selected to heat the battery pack, because the scene corresponding to the state is that the engine is just flameout and the battery pack just begins to work, the temperature of the battery pack in the period of time is lower than the first heating temperature, and the engine has higher residual temperature, so the engine loop can be directly selected to heat the battery pack, and the temperature of the battery pack is quickly separated from a low-temperature stage.
In this embodiment, when the temperature of the battery pack is greater than the first heating temperature and less than the second heating temperature, before the engine circuit is used to heat the battery pack, the method may further include step S1041: judging whether the engine circuit can effectively heat the battery pack, referring to fig. 2, in this embodiment, a preset temperature may be preset, where the preset temperature is higher than the second heating temperature, for example, may be 28 ℃, 30 ℃, 32 ℃, and the like, judging whether the engine temperature is greater than the preset temperature, when the engine temperature is greater than the preset temperature, it indicates that the engine circuit can effectively heat the battery pack, and then the actions are continuously performed: the battery pack is heated using the engine circuit.
In this embodiment, when it is determined in step S103 that the temperature of the heat recovery device is greater than the engine temperature, the heat recovery device may be used to heat the battery pack, and when the heat recovery device is used to heat the battery, referring to fig. 3, the method further includes: step S1031: judging whether the temperature of the battery pack is lower than a third heating temperature, wherein the third heating temperature is higher than the second heating temperature, the third heating temperature is a temperature value close to the optimal working temperature of the battery pack, but the third heating temperature is lower than the optimal working temperature of the battery pack, when the temperature of the battery pack is judged to be lower than the third heating temperature, the battery pack is not up to the optimal working temperature, and at the moment, a heat recovery device can be used for heating the battery pack so that the battery pack can be up to the optimal working temperature quickly. Further, when the heat recovery device is used for heating the battery pack, whether the heat recovery device can effectively heat the battery pack can be judged in advance, and specifically, when the temperature of the heat recovery device is larger than that of the battery pack and the temperature difference of the heat recovery device and the battery pack is larger than the preset temperature difference, the heat recovery device can effectively heat the battery pack, when the heat recovery device can effectively heat the battery pack, the water pump in the heat recovery device is controlled to work at a constant speed, the electromagnetic valve in the heating pipeline between the heat recovery device and the battery pack is controlled to be gradually opened, the high-temperature medium in the heat recovery device circulates to the battery pack under the driving of the water pump in the heat recovery device, heat exchange is carried out between the high-temperature medium and the battery pack, and the high-temperature medium flows back to the heat recovery device after the heat exchange is completed.
In the technical solution disclosed in this embodiment, in the process of heating the battery pack, real-time monitoring is required for the temperature of the battery pack, when the temperature of the battery pack has reached the target temperature (the optimal working temperature of the battery pack) or is the temperature of the battery pack is stable, the specific value of the target temperature varies with the type and specification of the battery pack, in this embodiment, the target temperature may be set to 40 ℃ or other, and after the target temperature is reached or the temperature of the battery pack is stable, the heating of the battery pack may be stopped, and in particular, referring to fig. 4, the method may further include:
step S401: and judging whether the temperature of the battery pack is less than the target temperature.
The target temperature is a preset optimal operating temperature of the battery pack, and when the battery pack is in operation, the temperature of the battery pack is preferably not higher than the optimal operating temperature, and if the temperature is higher than the optimal operating temperature, the output efficiency of the battery pack may be reduced, or the service life of the battery pack may be affected, so that it is required to detect whether the temperature of the battery pack reaches the target temperature or not during the process of heating the battery pack.
Step S402: and when the temperature of the battery pack is smaller than the target temperature, judging whether the fluctuation range of the temperature of the battery pack is in a target range in the current period.
In this step, considering that the temperature of the battery pack does not reach the target temperature, which may be caused by the fact that the temperature of the engine loop is too low or the heat exchange efficiency between the engine loop and the battery pack is too low, the temperature of the battery pack needs to be continuously judged, in this step, whether the temperature of the battery pack has reached stability is continuously judged, if the temperature of the battery pack is highest in the current period, even if the battery pack is heated again, the temperature of the battery pack only fluctuates in a small range, and the temperature of the battery pack does not further increase, and based on this step, whether the temperature of the battery pack has reached the highest is judged by judging whether the fluctuation range of the temperature of the battery pack is within the target range (for example, the fluctuation range does not exceed + -2 ℃) in the current period (which may be 10 minutes or other periods), and if the battery pack has reached the highest, the heating of the battery pack needs to be stopped.
If the fluctuation range of the battery pack temperature is not within the target range, the temperature of the heat collection tank can be further increased, and the process returns to the step S401 to perform analysis of the next period.
Step S403: and stopping heating the battery pack when the battery pack temperature is greater than the target temperature or the fluctuation range of the battery pack temperature is within a target range.
In this step, when it is detected that the battery pack temperature has reached the target temperature or that the battery pack temperature has reached the highest temperature (the fluctuation range of the temperature of the battery pack is within the target range in the current cycle), the heating of the battery pack is stopped.
In this embodiment, before the battery pack is heated after the engine is turned off, it may be further determined in advance whether the current state of the vehicle satisfies the battery pack heating condition, when the battery pack heating condition is not satisfied, no subsequent procedure is required to be executed, the heating condition of the battery pack may be set according to the user requirement, for example, determining whether the current state of the vehicle satisfies the battery pack heating condition may include any one or a combination of three of the following three items, and in the embodiment shown in fig. 5, three items are simultaneously used as the determining conditions for determining whether the current state of the vehicle satisfies the battery pack heating condition, as referring to fig. 5, determining whether the current state of the vehicle satisfies the battery pack heating condition includes:
step S501: and judging whether the environmental temperature of the vehicle is greater than a preset environmental temperature.
The value of the preset ambient temperature can be set to 20 ℃, namely, when the ambient temperature of the vehicle is lower than 20 ℃, the engine loop or the heat recovery device can be adopted to heat the battery pack, and when the ambient temperature of the vehicle is higher than 20 ℃, the battery pack can quickly reach the optimal working temperature without heating, and at the moment, the process is required to be ended.
Step S502: and judging whether the residual electric quantity of the battery pack is larger than a preset residual electric quantity or not.
In this step, the remaining power refers to the remaining power of the battery pack, for example, the value of the preset remaining power may be 30% or 20%, and in the implementation process of this scheme, it is required to ensure that the remaining power of the battery pack is greater than the preset remaining power, and it is required to ensure that the battery pack supplies power to the small storage battery, so as to avoid the feeding situation of the small storage battery when executing the policy;
step S503: and judging whether the heat recovery device is in a starting state or not.
If the heat recovery device is not started, the requirement of the user for heat recovery is not needed, and all the follow-up schemes disclosed in the embodiment of the application cannot be executed at the moment, and of course, the scheme of heating the battery pack by adopting the engine loop in the scheme can be executed at the moment.
According to the technical scheme, after the engine is turned off, the engine waste heat is collected by judging the temperature of the heat recovery device, the temperature of the engine and the temperature of the battery pack, and reasonably arranging the heat recovery device or the battery pack, so that the engine waste heat can be more effectively recycled, the engine loop or the waste of the engine waste heat is avoided, the heating energy is saved, and the vehicle performance is improved.
Corresponding to the method, the embodiment also discloses a device for reutilizing the pre-waste heat of the engine after the vehicle is stopped, and specific working contents of each unit in the device are disclosed, please refer to the contents of the embodiment of the method.
The device for recycling the pre-waste heat of the engine after the vehicle is stopped, which is provided by the embodiment of the application, can be correspondingly referred to the method for recycling the pre-waste heat of the engine after the vehicle is stopped.
Referring to fig. 6, the apparatus may include:
an engine state monitoring unit 10 for detecting whether the engine enters a flameout state from a start state;
a first judging unit 20, corresponding to step S101 in the above method, for judging whether the temperature of the battery pack is higher than the first heating temperature when the engine enters a flameout state from a start state;
a second judging unit 30, corresponding to step S102 in the above method, for judging whether the engine can heat the heat recovery device for recovering heat from the vehicle when the battery pack temperature is higher than the first heating temperature;
a third judging unit 40, corresponding to step S103 in the above method, for judging whether the temperature of the heat recovery device is greater than the engine temperature when the engine is unable to heat the heat recovery device, the heat recovery device being used for recovering heat from the vehicle;
and a fourth judging unit 50, corresponding to step S104 and step S105 in the above method, for judging whether the battery pack temperature is lower than a second heating temperature, which is higher than the first heating temperature, when the heat recovery device temperature is lower than the engine temperature, and controlling the engine circuit to heat the battery pack when the battery pack temperature is lower than the second heating temperature.
Corresponding to the above method, the present application also discloses a device for recycling pre-waste heat of an engine after a vehicle is parked, and fig. 7 is a hardware structure diagram of the device for recycling pre-waste heat of an engine after a vehicle is parked, which may be loaded in a driving computer, as shown in fig. 7, and the device may include: at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;
in the embodiment of the present application, the number of the processor 100, the communication interface 200, the memory 300 and the communication bus 400 is at least one, and the processor 100, the communication interface 200 and the memory 300 complete the communication with each other through the communication bus 400; it will be apparent that the communication connection schematic shown in the processor 100, the communication interface 200, the memory 300 and the communication bus 400 shown in fig. 7 is only optional;
alternatively, the communication interface 200 may be an interface of a communication module, such as an interface of a GSM module;
the processor 100 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present application.
Memory 300 may comprise high-speed RAM memory or may further comprise non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 100 is specifically configured to perform the steps of the method for recycling pre-waste heat of an engine after a vehicle is parked according to any one of the above embodiments of the present application, for example, the processor is configured to:
when the engine enters a flameout state from a starting state, judging whether the temperature of the battery pack is higher than a first heating temperature or not;
when the temperature of the battery pack is higher than the first heating temperature, judging whether the engine can heat a heat recovery device or not, wherein the heat recovery device is used for recovering heat of a vehicle;
when the engine cannot heat the heat recovery device, judging whether the temperature of the heat recovery device is higher than the temperature of the engine;
when the temperature of the heat recovery device is smaller than the temperature of the engine, judging whether the temperature of the battery pack is lower than a second heating temperature or not, wherein the second heating temperature is larger than the first heating temperature;
and when the temperature of the battery pack is lower than the second heating temperature, controlling the engine loop to heat the battery pack.
Corresponding to the device, the application also discloses a vehicle, which can be applied to the device for reutilizing the pre-waste heat of the engine after the vehicle is stopped, and can be a hybrid electric vehicle.
For convenience of description, the above system is described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … ·" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. 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 application. Thus, the present application 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 (10)
1. The method for reutilizing the pre-waste heat of the engine after the vehicle is stopped is characterized by comprising the following steps of:
when the engine enters a flameout state from a starting state, judging whether the temperature of the battery pack is higher than a first heating temperature or not;
when the temperature of the battery pack is higher than the first heating temperature, judging whether the engine can heat a heat recovery device or not, wherein the heat recovery device is used for recovering heat of a vehicle;
when the engine cannot heat the heat recovery device, judging whether the temperature of the heat recovery device is higher than the temperature of the engine;
when the temperature of the heat recovery device is smaller than the temperature of the engine, judging whether the temperature of the battery pack is lower than a second heating temperature or not, wherein the second heating temperature is larger than the first heating temperature;
and when the temperature of the battery pack is lower than the second heating temperature, controlling an engine loop to heat the battery pack.
2. The method for pre-waste heat reuse of an engine after stopping a vehicle according to claim 1, wherein the engine circuit is controlled to heat the battery pack when the battery pack temperature is lower than the first heating temperature.
3. The method for pre-waste heat reuse of an engine after stopping a vehicle according to claim 1, characterized by further comprising, when the heat recovery device temperature is greater than the engine temperature:
judging whether the temperature of the battery pack is lower than a third heating temperature or not, wherein the third heating temperature is higher than the second heating temperature;
and when the temperature of the battery pack is lower than the third heating temperature, heating the battery pack by adopting the heat recovery device.
4. The method for reutilization of pre-heat of engine after stopping of vehicle according to claim 1, further comprising, when the battery pack is heated:
judging whether the temperature of the battery pack reaches a target temperature;
judging whether the fluctuation range of the battery pack temperature is within a target range or not;
and stopping heating the battery pack when the temperature of the battery pack reaches the target temperature or the fluctuation range is within the target range.
5. The method for pre-heat recovery of an engine after stopping a vehicle according to claim 1, wherein after determining that the battery pack temperature is lower than the second heating temperature, before controlling the engine circuit to heat the battery pack, further comprising:
judging whether the water temperature of the engine is higher than a preset temperature;
and when the temperature of the engine water is higher than the preset temperature, continuing to execute the subsequent steps.
6. The method for pre-waste heat reuse of an engine after stopping a vehicle according to claim 1, wherein after the engine is put into a flameout state from a start state, before judging whether the battery pack temperature is higher than the first heating temperature, further comprising:
and judging whether the current state of the vehicle meets the battery pack heating condition, and continuously executing the follow-up steps when the current state of the vehicle meets the battery pack heating condition.
7. The method for pre-waste heat reuse of an engine after stopping a vehicle according to claim 8, wherein determining whether the current state of the vehicle satisfies a battery pack heating condition comprises:
judging whether the environmental temperature of the vehicle is greater than a preset environmental temperature;
and/or judging whether the residual capacity of the battery pack is larger than a preset residual capacity.
8. An engine pre-heat recycling device after a vehicle is stopped, comprising:
the engine state monitoring unit is used for detecting whether the engine enters a flameout state from a starting state;
a first judging unit for judging whether the temperature of the battery pack is higher than a first heating temperature when the engine enters a flameout state from a start state;
a second judging unit configured to judge whether the engine can heat a heat recovery device for recovering heat from the vehicle when the battery pack temperature is higher than the first heating temperature;
a third judging unit configured to judge whether the temperature of the heat recovery device is higher than the temperature of the engine when the engine cannot heat the heat recovery device, the heat recovery device being configured to recover heat from the vehicle;
and the fourth judging unit is used for judging whether the temperature of the battery pack is lower than a second heating temperature or not when the temperature of the heat recovery device is lower than the temperature of the engine, wherein the second heating temperature is higher than the first heating temperature, and controlling an engine loop to heat the battery pack when the temperature of the battery pack is lower than the second heating temperature.
9. The device for reutilizing the pre-waste heat of the engine after the vehicle is stopped is characterized by comprising a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute the program to implement the respective steps of the method for reutilizing engine pre-heat after stopping the vehicle according to any one of claims 1 to 7.
10. A vehicle, characterized in that the apparatus for reutilizing pre-waste heat of an engine after stopping the vehicle according to claim 9 is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797083.0A CN116691453A (en) | 2023-06-30 | 2023-06-30 | Method, device and equipment for reutilizing pre-waste heat of engine after vehicle stopping and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797083.0A CN116691453A (en) | 2023-06-30 | 2023-06-30 | Method, device and equipment for reutilizing pre-waste heat of engine after vehicle stopping and vehicle |
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| Publication Number | Publication Date |
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| CN116691453A true CN116691453A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310797083.0A Pending CN116691453A (en) | 2023-06-30 | 2023-06-30 | Method, device and equipment for reutilizing pre-waste heat of engine after vehicle stopping and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116691453A (en) |
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2023
- 2023-06-30 CN CN202310797083.0A patent/CN116691453A/en active Pending
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