CN115583163A - Energy management method and device for extended range vehicle at low temperature - Google Patents

Energy management method and device for extended range vehicle at low temperature Download PDF

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Publication number
CN115583163A
CN115583163A CN202211345750.3A CN202211345750A CN115583163A CN 115583163 A CN115583163 A CN 115583163A CN 202211345750 A CN202211345750 A CN 202211345750A CN 115583163 A CN115583163 A CN 115583163A
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China
Prior art keywords
battery
air conditioner
energy management
temperature
upper limit
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CN202211345750.3A
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Chinese (zh)
Inventor
田宇
吴生玉
鲁云
王月成
张迪
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Hozon New Energy Automobile Co Ltd
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Hozon New Energy Automobile Co Ltd
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Priority to CN202211345750.3A priority Critical patent/CN115583163A/en
Publication of CN115583163A publication Critical patent/CN115583163A/en
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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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • 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
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • 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
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/13—Maintaining the SoC within a determined range
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The application discloses energy management method and device for extended range type vehicle at low temperature, relates to the technical field of vehicles, and provides an effective solution for solving the problem of low temperature and low residual power and avoiding vehicle groveling. The main technical scheme of the application is as follows: acquiring the current residual capacity of a vehicle battery; judging whether the current residual capacity is greater than or equal to a preset residual capacity threshold value; if yes, saving the energy consumption of the battery according to the first energy management mode; if not, judging whether the upper limit value of the currently allowed charging power of the battery cell is zero; if so, heating the battery to reach the target temperature to recover charging the vehicle battery according to a second energy management mode; if not, the range extender is used for charging the battery according to a third energy management mode.

Description

Energy management method and device for extended range vehicle at low temperature
Technical Field
The application relates to the technical field of vehicles, in particular to a method and a device for energy management of an extended-range vehicle at a low temperature.
Background
The range extender generally refers to an electric vehicle component which can provide additional electric energy, so that the electric vehicle can increase the driving distance. At present, under the condition of low temperature and low battery residual capacity, the conventional range extender vehicle does not perform special control on the starting of the range extender, such as only performing control according to the current maximum allowable charging capacity of the battery, the electric power consumption condition of the whole vehicle, the vehicle speed and the required target residual capacity value, which is basically the same as the control logic of the range extender at normal temperature.
At present, under the condition that the temperature of a battery cell is low, the maximum allowable charging power of the battery is extremely low, and even the charging current is not allowed at a certain temperature. For example: in winter, a user uses the vehicle to reduce the electric quantity of the battery to be below 20% or even 10% in the previous day, the vehicle is not charged after the vehicle is used, the battery core temperature is reduced to-20 ℃ or even below-30 ℃ due to the low environmental temperature in the next day, the battery does not receive any charging current, the range extender is not allowed to be started in the use process of the vehicle, and the electric quantity is reduced to 0 before the battery core temperature is recovered, so that the groveling is caused.
However, for the condition that the vehicle is in the low residual capacity of low temperature, because the habit has the existence that increases the journey ware, the condition that the low-power does not charge appears very easily when the user uses to when the battery does not accept the condition of charging any charging current, increase the journey ware also be inoperative, can lead to the vehicle to lie prone like this, consequently need promptly to deal with the condition of low residual capacity of low temperature and avoid the effective solution of vehicle to lie prone.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for energy management of an extended range vehicle at a low temperature, and provides an effective solution for avoiding vehicle groveling in response to a low-temperature low-remaining-power condition.
The application mainly provides the following technical scheme:
the application provides a method for energy management of an extended range vehicle at low temperature in a first aspect, and the method comprises the following steps:
acquiring the current residual capacity of a vehicle battery;
judging whether the current residual capacity is greater than or equal to a preset residual capacity threshold value;
if yes, saving the energy consumption of the battery according to the first energy management mode;
if not, judging whether the upper limit value of the currently allowable charging power of the battery cell is zero;
if yes, heating the battery to reach the target temperature according to a second energy management mode to recover charging the vehicle battery; and if not, charging the battery by using the range extender according to a third energy management mode.
In some modified embodiments of the first aspect of the present application, the heating the battery to the target temperature to resume charging the vehicle battery in the second energy management mode includes:
the range extender idle heating coolant is used as a heat source to heat the battery to a target temperature to resume charging the vehicle battery.
In some variations of the first aspect of the present application, the second energy management mode further comprises:
the upper limit value of the electric power of the drive motor is linearly decreased to zero as the current remaining capacity of the vehicle battery gradually decreases.
In some modified embodiments of the first aspect of the present application, the saving battery power consumption in the first power management mode includes:
acquiring the temperature in a cab and the set temperature of an air conditioner;
judging whether the difference between the set temperature of the air conditioner and the temperature in the cab is greater than or equal to a first preset difference or not;
if so, selecting first working power from the air conditioner heater on the premise of the upper limit value of the working power of the air conditioner heater, and controlling the air conditioner heater to execute work;
if not, judging whether the difference value is larger than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value;
if so, along with the gradual reduction of the difference value, linearly reducing the upper limit value of the working power of the air conditioner heater to zero, selecting a second working power from the upper limit value of the working power of the air conditioner heater, and controlling the air conditioner heater to execute work;
if not, the upper limit of the operating power of the air conditioner heater is reduced to zero to turn off the air conditioner heater and heat the cab by using the temperature of the coolant of the engine as an alternative heat source, in some modified embodiments of the first aspect of the present application, the saving of battery energy consumption in the first energy management mode further includes:
judging whether the upper limit value of the current allowable charging power of the battery cell is zero;
if so, the idle speed heating cooling liquid of the range extender is used as a heat source to heat the battery to reach the target temperature so as to recover charging the vehicle battery;
and if not, charging the battery by using the range extender according to a third energy management mode.
A second aspect of the present application provides an extended range vehicle low temperature energy management apparatus, the apparatus comprising:
an acquisition unit for acquiring a current remaining capacity of a vehicle battery;
the judging unit is used for judging whether the current residual capacity reaches a preset residual capacity threshold value;
a first execution unit, configured to save battery energy consumption according to a first energy management mode when it is determined that the current remaining power is greater than or equal to a preset remaining power threshold;
the second execution unit is used for judging whether the upper limit value of the currently allowed charging power of the battery cell is zero or not when the current residual capacity is determined to not reach the preset residual capacity threshold value;
a third execution unit, configured to, when it is determined that the current allowable charging power upper limit value of the battery electric core is zero, heat the battery to reach a target temperature according to a second energy management mode to resume charging the vehicle battery;
and the fourth execution unit is used for charging the battery by using the range extender according to the third energy management mode when the current allowable charging power upper limit value of the battery electric core is determined not to be zero.
In some modified embodiments of the second aspect of the present application, the third executing unit is further specifically configured to:
the range extender idle heated coolant is used as a heat source to heat the battery to a target temperature to resume charging the vehicle battery.
In some variations of the second aspect of the present application, the second energy management mode further comprises:
the upper limit value of the electric power of the drive motor is linearly decreased to zero as the current remaining capacity of the vehicle battery is gradually decreased.
In some modified embodiments of the second aspect of the present application, the first execution unit includes:
the acquisition module is used for acquiring the temperature in the cab and the set temperature of the air conditioner;
the first judgment module is used for judging whether the difference value between the set temperature of the air conditioner and the temperature in the cab is greater than or equal to a first preset difference value or not;
the first execution module is used for selecting first working power from the air conditioner heater and controlling the air conditioner heater to execute work on the premise of the upper limit value of the working power of the air conditioner heater when the difference value between the set temperature of the air conditioner and the temperature in the cab is determined to be larger than or equal to a first preset difference value;
the second execution module is used for judging whether the difference value is larger than or equal to a second preset difference value when the difference value between the set temperature of the air conditioner and the temperature in the cab is determined to not reach a first preset difference value, and the second preset difference value is smaller than the first preset difference value;
the third execution module is used for linearly reducing the upper limit value of the working power of the air conditioner heater to zero along with the gradual reduction of the difference value when the difference value is judged to be greater than or equal to a second preset difference value, and selecting second working power from the upper limit value of the working power of the air conditioner heater to control the air conditioner heater to execute work;
and the fourth execution module is used for enabling the working power upper limit value of the air conditioner heater to be zero when the difference value does not reach a second preset difference value, so that the air conditioner heater is turned off to work, and the temperature of the cab is increased by taking cooling liquid of the engine as a substitute heat source.
In some modified embodiments of the second aspect of the present application, the first execution unit further includes:
the second judgment module is used for judging whether the upper limit value of the currently allowed charging power of the battery cell is zero or not;
and the fifth execution module is used for heating the battery to reach the target temperature by using the idle-speed heating coolant of the range extender as a heat source when judging that the upper limit value of the current allowable charging power of the battery electric core is zero so as to recover charging to the vehicle battery.
And the sixth execution module is used for charging the battery by using the range extender according to the third energy management mode when the current allowable charging power upper limit value of the battery electric core is judged not to be zero.
A third aspect of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the extended range vehicle low temperature energy management method as described above.
A fourth aspect of the present application provides an electronic device, comprising: the energy management system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the energy management method of the extended range vehicle at low temperature.
By means of the technical scheme, the technical scheme provided by the application at least has the following advantages:
the application provides a low-temperature energy management method and device for a range-extended vehicle, and the method and device are used for judging whether the current residual electric quantity is larger than or equal to a preset residual electric quantity threshold value or not under the condition that the vehicle is at a low temperature and low residual electric quantity, if so, saving the energy consumption of a battery according to a first energy management mode, and if not, judging whether the upper limit value of the current allowable charging power of a battery cell is zero or not; and if the upper limit value of the current allowable charging power of the battery cell is judged to be zero, heating the battery to reach the target temperature to recover charging the vehicle battery according to the second energy management mode, otherwise, charging the battery by using the range extender according to the third energy management mode. Compare in prior art, this application utilizes three kinds of energy management modes, can effectively avoid the vehicle to be in the low residual capacity of low temperature and the unable circumstances of accepting any charging current, and the reply solution that this application provided can effectively avoid the vehicle nest of lying prone under the low residual capacity of low temperature circumstances.
The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
Fig. 1 is a flowchart of a method for energy management of an extended range vehicle at low temperature according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for low temperature energy management of an extended range vehicle according to an embodiment of the present disclosure;
fig. 3 is a block diagram illustrating an energy management device of an extended range vehicle at low temperature according to an embodiment of the present disclosure;
fig. 4 is a block diagram of another energy management device for an extended range vehicle at low temperature according to an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The embodiment of the present application provides a method for energy management of an extended range vehicle at a low temperature, as shown in fig. 1, for the embodiment of the present application, the following specific steps are provided:
101. the current remaining capacity of the vehicle battery is acquired.
102. And judging whether the current residual capacity is greater than or equal to a preset residual capacity threshold value or not.
The scheme provided by the embodiment of the application is suitable for a vehicle running application scene or a vehicle stopping application scene in a low-temperature environment, and the core of the scheme provided by the embodiment of the application is as follows: and performing energy management by utilizing three different energy management modes based on the current residual capacity and whether the battery accepts charging current or not so as to prevent the vehicle from groveling.
The preset residual capacity threshold value is obtained based on historical driving and driving experience of historical residual capacity, and has the following functions: for measuring whether the vehicle is in a low remaining capacity state, for example, the preset remaining capacity threshold is 10%.
103a, if the current residual capacity is determined to be larger than or equal to the preset residual capacity threshold value, saving the energy consumption of the battery according to the first energy management mode.
In the embodiment of the present application, if the current remaining power reaches the preset remaining power threshold, that is, is greater than or equal to the preset remaining power threshold, it indicates that the power is sufficient to support driving power, but should save battery energy consumption, for example, the first energy management mode is used to save energy consumption of the whole vehicle on the premise of providing basic driving power, for example, in a low-temperature environment, the air conditioner heater is a main consumption object of power, so it can be used sparingly.
103b, if the current residual capacity is determined not to reach the preset residual capacity threshold value, judging whether the upper limit value of the current allowable charging power of the battery electric core is zero.
In this embodiment of the application, if the current remaining power does not reach the preset remaining power threshold, that is, is less than the preset remaining power threshold, it indicates that the vehicle is in a low power state, and because the vehicle is in a low temperature environment, it should be detected whether the battery can still receive charging, that is, it is determined whether the current allowable charging power upper limit value of the battery electric core is zero.
104bc, if the upper limit value of the current allowable charging power of the battery cell is determined to be zero, heating the battery to reach the target temperature according to a second energy management mode so as to recover charging the vehicle battery.
104bd, if it is determined that the current allowable charging power upper limit value of the battery electric core is not zero, charging the battery by using the range extender according to a third energy management mode.
For the embodiment of the present application, if the current allowable charging power upper limit value of the battery electric core is zero, it indicates that the low-temperature environment affects the battery electric core, so that the battery electric core cannot accept any charging, measures should be taken immediately to recover charging, otherwise, a vehicle recess risk may occur, for example, according to the second energy management mode, the battery is heated to reach the target temperature to recover charging the vehicle battery.
However, if the upper limit value of the currently allowable charging power of the battery cell is not zero, but the battery charging power is very low due to a low-temperature environment, a third management mode is adopted to process, for example, the range extender is used to charge the battery, and it should be noted that although the range extender should be used to charge the battery in time, care should be taken to prevent overcharging and damage to the battery (which results in a reduction in battery life).
In the embodiment of the application, when the vehicle is in a low-temperature low-remaining-power state, whether the current remaining power is greater than or equal to a preset remaining power threshold value is judged, if yes, battery energy consumption is saved according to a first energy management mode, and if not, whether the upper limit value of the current allowable charging power of a battery cell is zero is judged; and if the upper limit value of the current allowable charging power of the battery cell is judged to be zero, heating the battery to reach the target temperature to recover charging the vehicle battery according to the second energy management mode, otherwise, charging the battery by using the range extender according to the third energy management mode. Compared with the prior art, the embodiment of the application utilizes three energy management modes, can effectively avoid the condition that the vehicle is in low-temperature low residual capacity and cannot accept any charging current, and the coping solution provided by the application can effectively avoid the vehicle lying prone under the condition of low-temperature low residual capacity.
Further, for more detailed explanation, the embodiment of the present application provides another method for energy management of an extended range vehicle at low temperature, as shown in fig. 2, and the following steps are provided for the embodiment of the present application:
201. the current remaining capacity of the vehicle battery is acquired.
202. And judging whether the current residual capacity is greater than or equal to a preset residual capacity threshold value.
In the embodiment of the present application, the steps 201 to 201 are explained with reference to the steps 101 to 102, which are not described herein again.
203a, if the current residual capacity is determined to be larger than or equal to the preset residual capacity threshold value, acquiring the temperature in the cab and the set temperature of the air conditioner.
In the embodiment of the present application, since the air conditioner heater is in a low temperature environment and the air conditioner heater is in a main power consumption, the embodiment of the present application takes the air conditioner heater as an example, and the explanation is made on the energy saving processing in the first energy management mode, as shown in steps 204a, 205ac, 205ad, 206ade and 206adf.
204a, judging whether the difference between the air conditioner set temperature and the temperature in the cab is larger than or equal to a first preset difference.
In order to provide an application scenario requiring heating at a low temperature, the difference between the set temperature of the air conditioner and the temperature in the cab needs to be calculated to further determine how to control the vehicle to heat.
In the embodiment of the present application, a first preset difference value is "30 degrees", and a second preset difference value is "15 degrees", so as to exemplarily obtain three temperature difference scenarios: the temperature difference is more than 30 ℃; the temperature difference is between 15 degrees and 30 degrees; the temperature difference is less than 15 ℃; the numerical value boundary may be further defined as which temperature difference scene according to actual requirements, and no special limitation is required herein.
205ac, if the difference between the set temperature of the air conditioner and the temperature in the cab is determined to be greater than or equal to a first preset difference, selecting first working power from the set temperature of the air conditioner and the temperature in the cab on the premise of the upper limit value of the working power of the air conditioner heater, and controlling the air conditioner heater to work.
In the embodiment of the present application, the step is an application scenario of "the temperature difference is greater than 30 degrees", and since the remaining power is greater than or equal to the preset remaining power threshold at this time, which indicates that the power is sufficient to support the operation of the air conditioner heater, the operation is performed at the upper limit of the operating power of the air conditioner heater, with the purpose that: the temperature in the cab is heated as soon as possible to reach the set temperature of the air conditioner, so that the comfort degree of a user in the cab is ensured.
However, it should be noted that the heating operation may not necessarily be performed at the upper limit of the operating power of the air conditioner heater due to cooperation with other components in the vehicle, but in order to satisfy the condition of increasing the heating speed, the embodiment of the present invention is limited to selecting the first operating power within the upper limit range to perform the operation, for example, the upper limit is 5kw, and the first operating power is selected to be 3kw. It should be noted that the embodiments of the present application aim to use the upper limit value to expand the corresponding selectable range of the first operating power.
205ad, if it is determined that the difference between the temperature in the cab and the air conditioner set temperature does not reach a first preset difference, determining whether the difference is greater than or equal to a second preset difference, the second preset difference being less than the first preset difference.
206ade, if the difference value is determined to reach the second preset difference value, linearly reducing the upper limit value of the working power of the air conditioner heater to zero, selecting the second working power from the upper limit value, and controlling the air conditioner heater to execute work.
In the embodiment of the present application, the step is an application scenario such as "the temperature difference is between 15 degrees and 30 degrees", because the temperature difference is smaller than that, and along with the operation of the air conditioner heater, the temperature difference is smaller and smaller, so that in consideration of energy saving, the embodiment of the present application can linearly decrease the upper limit value of the operating power of the air conditioner heater to zero, that is, linearly decrease the range of the selectable operating power of the air conditioner heater, thereby achieving the purpose of reducing the operating power of the air conditioner heater during the operation time of the air conditioner heater, that is, selecting the second operating power to perform the heating operation within the linearly decreased range of the operating power, and thus continuously reducing the power consumption of the operation of the air conditioner heater.
206adf, if the difference value is determined not to reach the second preset difference value, the upper limit value of the working power of the air conditioner heater is reduced to zero to close the working of the air conditioner heater, and the temperature of the coolant of the engine is used as a substitute heat source to heat the cab.
In the embodiment of the present application, the step is an application scenario of "the temperature difference is less than 15 degrees", because the temperature difference is very small, the requirement for heating the cab is not so urgent, and in comparison, the operation in the cab can be completed without consuming electric quantity, so the upper limit value of the operating power of the air conditioner heater is zero, so as to turn off the operation of the air conditioner heater.
However, in addition, for extended range vehicle types, the temperature of the engine coolant can be used as an alternative heat source during driving to raise the temperature in the cab, so that the heating purpose can be achieved on the premise of reducing the power consumption as much as possible.
It should be noted that, in the process of using the air conditioner heater, if necessary, the water liquid inside the battery or the heating film may be used to assist the heating operation.
203b, if it is determined that the current residual capacity does not reach the preset residual capacity threshold, determining whether the current allowable charging power upper limit value of the battery electric core is zero.
204bc, if the current allowable charging power upper limit value of the battery cell is determined to be zero, the heating battery reaches the target temperature so as to recover charging the vehicle battery.
In this embodiment of the application, this step is the second energy management mode, and if the current allowable charging power upper limit value of judging battery electricity core is zero, it indicates that low temperature environment causes the influence to battery electricity core for the battery does not accept any charge, should take measures to handle this moment in time, so as to avoid the electric quantity to exhaust and lead to the vehicle nest of lying prone.
For example, in the embodiment of the application, in order to avoid the situation that too much electricity is consumed, the range extender idle speed heating cooling liquid is selected as a heat source to heat the battery to reach the target temperature so as to recover the charging of the vehicle battery.
And, at this time, as the current remaining capacity of the vehicle battery gradually decreases, the electric power upper limit value of the drive motor is linearly decreased to zero, with the object of: the vehicle driving power is reduced, the electric quantity consumption is saved, the vehicle battery charging device is applied to timely charging, the battery can receive charging until the temperature of the battery cell rises, and accordingly the vehicle groveling is effectively avoided.
204bd, if it is determined that the current allowable charging power upper limit value of the battery electric core is not zero, charging the battery by using the range extender.
In this embodiment of the application, the step is a third energy management mode, and if it is determined that the upper limit value of the currently allowed charging power of the battery electric core is not zero, it indicates that the battery electric core is not yet adversely affected by a low-temperature environment, and the range extender should be used to charge the battery in time.
In the embodiments of the present application, the exemplary low temperature environment is zero degree or less. In addition, regardless of the first energy management mode, the second energy management mode, or the third energy management mode, if it is detected that the current remaining capacity is still sufficient (i.e., higher than 10%, for example), the battery internal heating film enable may be turned on and made to rise faster so as to avoid too low a battery temperature decrease even in a low temperature environment, but if the current remaining capacity is low (e.g., equal to or lower than 10%), the battery internal heating film enable should be turned off, in view of saving the capacity.
Further, as an implementation of the method shown in fig. 1 and fig. 2, the embodiment of the present application provides a low-temperature energy management device for an extended range vehicle. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. The device is applied to and prevents the vehicle nest of lying prone under the low residual capacity of low temperature, specifically as shown in fig. 3, the device includes:
an acquisition unit 31 for acquiring a current remaining capacity of a vehicle battery;
a determining unit 32, configured to determine whether the current remaining power is greater than or equal to a preset remaining power threshold;
a first executing unit 33, configured to save battery energy consumption according to a first energy management mode when it is determined that the current remaining power is greater than or equal to a preset remaining power threshold;
a second executing unit 34, configured to, when it is determined that the current remaining power does not reach a preset remaining power threshold, determine whether a current allowable charging power upper limit value of the battery electric core is zero;
a third executing unit 35, configured to, when it is determined that the current allowable charging power upper limit value of the battery electric core is zero, heat the battery to reach the target temperature according to the second energy management mode to resume charging the vehicle battery;
and the fourth execution unit 36 is configured to, when it is determined that the current allowable charging power upper limit value of the battery electric core is not zero, charge the battery by using the range extender according to the third energy management mode.
Further, as shown in fig. 4, the third executing unit 35 is further specifically configured to:
the range extender idle heated coolant is used as a heat source to heat the battery to a target temperature to resume charging the vehicle battery.
Further, as shown in fig. 4, the second energy management mode further includes:
the upper limit value of the electric power of the drive motor is linearly decreased to zero as the current remaining capacity of the vehicle battery is gradually decreased.
Further, as shown in fig. 4, the first execution unit 33 includes:
the acquiring module 331 is configured to acquire an indoor temperature and an air conditioner setting temperature;
a first determining module 332, configured to determine whether a difference between the set temperature of the air conditioner and the temperature in the cab is greater than or equal to a first preset difference;
a first executing module 333, configured to select a first operating power from the set air conditioner temperature and the set cabin interior temperature on the premise of an upper limit of an operating power of an air conditioner heater, and control the air conditioner heater to execute operation when it is determined that a difference between the set air conditioner temperature and the temperature in the cabin is greater than or equal to a first preset difference;
a second execution module 334, configured to determine whether the difference between the air conditioner set temperature and the cabin interior temperature is greater than or equal to a second preset difference when it is determined that the difference does not reach a first preset difference, where the second preset difference is smaller than the first preset difference;
a third executing module 335, configured to, when it is determined that the difference is greater than or equal to a second preset difference, gradually decrease the upper limit of the operating power of the air conditioning heater to zero along with the decrease of the difference, and select a second operating power from the upper limit of the operating power of the air conditioning heater, so as to control the air conditioning heater to perform operation;
and the fourth execution module 336 is used for setting the upper limit value of the working power of the air conditioner heater to zero when the difference value does not reach the second preset difference value, so as to close the work of the air conditioner heater, and taking the cooling liquid of the engine as a substitute heat source to heat the cab.
Further, as shown in fig. 4, the first executing unit 33 further includes:
the second judging module 337 is configured to judge whether the current allowable charging power upper limit of the battery electric core is zero;
and a fifth executing module 338, configured to, when it is determined that the current allowable charging power upper limit value of the battery electric core is zero, use the idle-speed heating coolant of the range extender as a heat source to heat the battery to reach the target temperature, so as to resume charging the vehicle battery.
A sixth executing module 339, configured to, when it is determined that the current allowable upper limit of charging power of the battery electric core is not zero, charge the battery by using the range extender according to the third energy management mode.
To sum up, the embodiment of the present application provides a method and a device for energy management of a range-extended vehicle at a low temperature, where the embodiment of the present application determines whether a current remaining power is greater than or equal to a preset remaining power threshold value when the vehicle is at a low temperature and a low remaining power, if so, saves battery energy consumption according to a first energy management mode, and if not, determines whether an upper limit value of a current allowable charging power of a battery electric core is zero; and if the upper limit value of the current allowable charging power of the battery cell is judged to be zero, heating the battery to reach the target temperature to recover charging the vehicle battery according to the second energy management mode, otherwise, charging the battery by using the range extender according to the third energy management mode. Compared with the prior art, the embodiment of the application utilizes three energy management modes, can effectively avoid the condition that the vehicle is in low-temperature low residual capacity and cannot accept any charging current, and the coping solution provided by the embodiment of the application can effectively avoid the vehicle lying prone under the condition of low-temperature low residual capacity.
The extended range vehicle low-temperature energy management device provided by the embodiment of the application comprises a processor and a memory, wherein the acquisition unit, the judgment unit, the first execution unit, the second execution unit, the third execution unit, the fourth execution unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can set one or more than one, and an effective solution for avoiding the groveling of the vehicle by coping with the condition of low temperature and low residual capacity is provided by adjusting the parameters of the kernel.
Embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements the method for low-temperature energy management of an extended-range vehicle as described above.
An embodiment of the present application provides an electronic device, including: the energy management system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the energy management method of the extended range vehicle at low temperature.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a device includes one or more processors (CPUs), memory, and a bus. The device may also include input/output interfaces, network interfaces, and the like.
The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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 phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims (11)

1. A method of low temperature energy management for an extended range vehicle, the method comprising:
acquiring the current residual capacity of a vehicle battery;
judging whether the current residual capacity is greater than or equal to a preset residual capacity threshold value;
if yes, saving the energy consumption of the battery according to the first energy management mode;
if not, judging whether the upper limit value of the currently allowed charging power of the battery cell is zero;
if yes, heating the battery to reach the target temperature according to a second energy management mode to recover charging the vehicle battery; and if not, charging the battery by using the range extender according to a third energy management mode.
2. The method of claim 1, wherein said heating the battery to the target temperature to resume charging the vehicle battery in the second energy management mode comprises:
the range extender idle heating coolant is used as a heat source to heat the battery to a target temperature to resume charging the vehicle battery.
3. The method of claim 2, wherein the second energy management mode further comprises:
the upper limit value of the electric power of the drive motor is linearly decreased to zero as the current remaining capacity of the vehicle battery gradually decreases.
4. The method of claim 1, wherein saving battery power consumption in the first energy management mode comprises:
acquiring the temperature in a cab and the set temperature of an air conditioner;
judging whether the difference between the set temperature of the air conditioner and the temperature in the cab is greater than or equal to a first preset difference;
if so, selecting first working power from the air conditioner heater on the premise of the upper limit value of the working power of the air conditioner heater, and controlling the air conditioner heater to execute work;
if not, judging whether the difference value is larger than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value;
if so, along with the gradual reduction of the difference value, linearly reducing the upper limit value of the working power of the air conditioner heater to zero, selecting a second working power from the upper limit value of the working power of the air conditioner heater, and controlling the air conditioner heater to execute work;
if not, the upper limit value of the working power of the air conditioner heater is reduced to zero to shut off the air conditioner heater, and the temperature of the cooling liquid of the engine is used as a substitute heat source to heat the cab.
5. The method of claim 4, wherein saving battery power consumption in the first energy management mode further comprises:
judging whether the upper limit value of the current allowable charging power of the battery cell is zero;
if so, using the idle speed heating cooling liquid of the range extender as a heat source to heat the battery to reach the target temperature so as to recover charging the vehicle battery;
and if not, charging the battery by using the range extender according to a third energy management mode.
6. An extended range vehicle low temperature energy management device, the device comprising:
an acquisition unit for acquiring a current remaining capacity of a vehicle battery;
the judging unit is used for judging whether the current residual capacity reaches a preset residual capacity threshold value;
a first execution unit, configured to save battery energy consumption according to a first energy management mode when it is determined that the current remaining power is greater than or equal to a preset remaining power threshold;
the second execution unit is used for judging whether the upper limit value of the currently allowed charging power of the battery cell is zero or not when the current residual capacity is determined not to reach the preset residual capacity threshold value;
the third execution unit is used for heating the battery to reach the target temperature to recover charging the vehicle battery according to the second energy management mode when the current allowable charging power upper limit value of the battery electric core is determined to be zero;
and the fourth execution unit is used for charging the battery by using the range extender according to a third energy management mode when the current allowable charging power upper limit value of the battery electric core is determined not to be zero.
7. The apparatus of claim 6, wherein the third execution unit is further specifically configured to:
the range extender idle heated coolant is used as a heat source to heat the battery to a target temperature to resume charging the vehicle battery.
8. The apparatus of claim 7, wherein the second energy management mode further comprises:
the upper limit value of the electric power of the drive motor is linearly decreased to zero as the current remaining capacity of the vehicle battery is gradually decreased.
9. The apparatus of claim 6, wherein the first execution unit comprises:
the acquisition module is used for acquiring the temperature in the cab and the set temperature of the air conditioner;
the first judgment module is used for judging whether the difference value between the set temperature of the air conditioner and the temperature in the cab is greater than or equal to a first preset difference value or not;
the first execution module is used for selecting first working power from the air conditioner heater and controlling the air conditioner heater to execute work on the premise of the upper limit value of the working power of the air conditioner heater when the difference value between the set temperature of the air conditioner and the temperature in the cab is determined to be larger than or equal to a first preset difference value;
the second execution module is used for judging whether the difference value is larger than or equal to a second preset difference value when the difference value between the set temperature of the air conditioner and the temperature in the cab is determined to not reach a first preset difference value, and the second preset difference value is smaller than the first preset difference value;
the third execution module is used for linearly reducing the upper limit value of the working power of the air conditioner heater to zero along with the gradual reduction of the difference value when the difference value is judged to be greater than or equal to a second preset difference value, and selecting second working power from the upper limit value of the working power of the air conditioner heater to control the air conditioner heater to execute work;
and the fourth execution module is used for enabling the working power upper limit value of the air conditioner heater to be zero when the difference value does not reach a second preset difference value, so that the air conditioner heater is turned off to work, and the temperature of the cab is increased by taking cooling liquid of the engine as a substitute heat source.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, implements the extended range vehicle low temperature energy management method according to any one of claims 1 to 5.
11. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the extended range vehicle low temperature energy management method of any of claims 1-5.
CN202211345750.3A 2022-10-31 2022-10-31 Energy management method and device for extended range vehicle at low temperature Pending CN115583163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211345750.3A CN115583163A (en) 2022-10-31 2022-10-31 Energy management method and device for extended range vehicle at low temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211345750.3A CN115583163A (en) 2022-10-31 2022-10-31 Energy management method and device for extended range vehicle at low temperature

Publications (1)

Publication Number Publication Date
CN115583163A true CN115583163A (en) 2023-01-10

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Country Link
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