CN116572931A - Battery electric quantity management method and device for hybrid vehicle, vehicle and medium - Google Patents
Battery electric quantity management method and device for hybrid vehicle, vehicle and medium Download PDFInfo
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- CN116572931A CN116572931A CN202310587294.1A CN202310587294A CN116572931A CN 116572931 A CN116572931 A CN 116572931A CN 202310587294 A CN202310587294 A CN 202310587294A CN 116572931 A CN116572931 A CN 116572931A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2555/00—Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
- B60W2555/20—Ambient conditions, e.g. wind or rain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/24—Energy storage means
- B60W2710/242—Energy storage means for electrical energy
- B60W2710/244—Charge state
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application discloses a battery power management method and device of a hybrid vehicle, the vehicle and a medium. The battery power management method comprises the following steps: acquiring the lowest temperature of the environment where the power battery is located in a preset time period, wherein the preset time period is a time period from the current moment to a future preset moment; determining the lowest state of charge of the power battery required for starting the vehicle according to the lowest temperature; and taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is stopped. According to the application, the charge state of the power battery can be intelligently controlled when the vehicle is parked, and even if the ambient temperature is reduced after the vehicle is parked, the residual electric quantity of the power battery is enough to control the engine to be started again, so that the hybrid vehicle can be normally started under the condition of long-time parking or sudden temperature drop.
Description
Technical Field
The embodiment of the application relates to the technical field of automobiles, in particular to a battery power management method and device for a hybrid electric vehicle, the vehicle and a medium.
Background
In the current conventional hybrid vehicle, the engine is started by the amount of electricity of the power battery. The State-of-Charge (SOC) of the power battery is controlled according to the optimal economy, and in the Charge balance mode, the State of Charge (or remaining Charge) of the power battery usually reaches a lower Charge level at the end of driving and shutdown. When the vehicle is parked for a long time after being parked or the air temperature is suddenly reduced, the problem that the residual electric quantity of the battery is reduced or the discharging power of the battery is reduced at low temperature can occur, and the engine can not be started under the extreme condition, so that the normal starting of the vehicle is influenced.
Disclosure of Invention
The invention provides a battery electric quantity management method, a device, a vehicle and a medium for a hybrid vehicle, which are used for intelligently controlling the charge state of a power battery when the vehicle is parked, so as to ensure that the vehicle can be normally started under the condition of long-time parking or sudden temperature drop.
In a first aspect, an embodiment of the present invention provides a method for managing battery power of a hybrid vehicle, including:
acquiring the lowest temperature of the environment where the power battery is located within a preset period; the preset time period is a time period from the current time to a future preset time;
Determining a minimum state of charge of the power battery required for starting the vehicle according to the minimum temperature;
and taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
In a second aspect, an embodiment of the present invention further provides a battery power management device for a hybrid vehicle, including:
the minimum temperature acquisition module is used for acquiring the minimum temperature of the environment where the power battery is located in a preset period; the preset time period is a time period from the current time to a future preset time;
a minimum state of charge determining module configured to determine a minimum state of charge of the power battery required for vehicle start according to the minimum temperature;
and the control module is used for controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked by taking the lowest state of charge as a target limit value.
In a third aspect, an embodiment of the present invention further provides a hybrid vehicle, including:
one or more processors;
a storage means for storing one or more programs;
the one or more programs are executed by the one or more processors, so that the one or more processors implement the battery power management method for the hybrid vehicle provided by the embodiment of the invention.
In a fourth aspect, the embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the battery power management method of the hybrid vehicle provided by the embodiment of the present invention.
The embodiment of the invention provides a battery power management method of a hybrid vehicle, which comprises the following steps: acquiring the lowest temperature of the environment where the power battery is located in a preset time period, wherein the preset time period is a time period from the current moment to a future preset moment; determining the lowest state of charge of the power battery required for starting the vehicle according to the lowest temperature; and taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is stopped. By using the method, the charge state of the power battery can be intelligently controlled when the vehicle is parked, and even if the ambient temperature is reduced after the vehicle is parked, the residual electric quantity of the power battery is enough to control the engine to be started again; the problem that an engine cannot be started due to power failure of a power battery when an optimal economic control strategy is adopted in the prior art is solved to a great extent, and the mixed motor vehicle can still be normally started under the condition of long-time parking or sudden temperature drop.
Drawings
Fig. 1 is a flowchart of a battery power management method for a hybrid vehicle according to an embodiment of the present invention;
fig. 2 is a flow chart of a battery power management method for a hybrid vehicle according to a second embodiment of the present invention;
fig. 3 is a flow chart of a battery power management method of a hybrid vehicle according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of a first preset correspondence relationship according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of a second preset correspondence relationship according to a third embodiment of the present invention;
fig. 6 is a flow chart of a battery power management method for a hybrid vehicle according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a battery power management device for a hybrid vehicle according to a fifth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently, or at the same time. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
The term "comprising" and variants thereof as used herein is intended to be open ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment".
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between corresponding contents and not for defining a sequential or interdependent relationship.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
Example 1
Fig. 1 is a schematic flow chart of a battery power management method for a hybrid vehicle according to an embodiment of the present invention, where the method may be applicable to managing power battery power of any type of hybrid vehicle (i.e. hybrid vehicle), and the method may be performed by a battery power management device of the hybrid vehicle, where the device may be implemented by software and/or hardware and is generally integrated in the hybrid vehicle.
As shown in fig. 1, a battery power management method for a hybrid vehicle according to an embodiment of the present invention includes the following steps:
S110, acquiring the lowest temperature of the environment where the power battery is located in a preset period.
The preset time period is a time period from the current time to a future preset time, that is, a time period from the current time to a future time.
Specifically, a hybrid vehicle is provided with two power sources, one of which is electric power and motor drive, and the other of which is fuel and engine drive. As described in the background art, in general, an engine in a hybrid vehicle is started by means of the electric quantity of a power battery, and if the environmental temperature is too low, the residual electric quantity and the discharge power of the power battery are seriously attenuated after the vehicle is parked for one night; when the residual electric quantity of the power battery is attenuated to an electric quantity which can not be started to meet the requirement of engine starting, the vehicle can not be started normally. In view of this, the present application proposes that the minimum temperature of the environment where the power battery is located in the preset period of time can be obtained in advance, and then the state of charge of the power battery is adjusted based on the minimum temperature, so that the remaining power of the power battery can meet the low temperature requirement when the vehicle is parked.
The minimum temperature of the environment where the power battery is located may be the minimum temperature of the weather, and the preset period may be a period of time, for example, several hours, one day or three days in the future, but is not limited thereto. The minimum temperature of the environment where the power battery is located can be obtained according to weather forecast or inferred according to the change condition of the temperature of the weather in the last days.
And S120, determining the lowest charge state of the power battery required for starting the vehicle according to the lowest temperature.
Further, the corresponding relation between the ambient temperature where the power battery is located and the state of charge of the power battery can be obtained in advance according to actual tests or calculation in the vehicle design stage, namely, a plurality of states of charge of the power battery meeting the vehicle starting requirement under different ambient temperatures are obtained, and the corresponding relation is stored in the battery power management device. And after the lowest temperature of the power battery is determined in the actual running process of the vehicle, searching the lowest state of charge corresponding to the lowest temperature in the corresponding relation.
And S130, taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
Further, the lowest state of charge of the power battery determined in the step is taken as a target state of charge, and the lowest state of charge is taken as a control target to control, so that the residual electric quantity of the power battery is larger than or equal to the lowest state of charge of the power battery when the vehicle is stopped after driving.
As known to those skilled in the art, the hybrid vehicle may be driven by an engine and a power battery during running, and the limitation of the minimum state of charge as a target may refer to adjusting the driving mode or the energy recovery condition of the vehicle so that the remaining power of the power battery meets the minimum state of charge requirement of the power battery, for example, when the remaining power of the power battery approaches the minimum state of charge, the hybrid vehicle may be driven by the engine as much as possible and no longer be driven by the power battery.
The embodiment of the present invention is not limited, and a person skilled in the art may set the power supply according to actual requirements.
Because the lowest state of charge of the power battery meets the starting requirement of the engine at the lowest temperature in a preset time period in the future, even if the ambient temperature drops after the vehicle is stopped, the residual electric quantity of the power battery is enough to control the engine to start again. The problem that an engine cannot be started due to power failure of a power battery when an optimal economic control strategy is adopted in the prior art is solved to a great extent, and the mixed motor vehicle can be normally started under the condition of long-time parking or sudden temperature drop.
The first embodiment of the invention provides a battery power management method for a hybrid vehicle, which includes the steps of firstly, obtaining the lowest temperature of an environment where a power battery is located in a preset time period, wherein the preset time period is a time period from a current time to a future preset time; secondly, determining the lowest charge state of the power battery required by starting the vehicle according to the lowest temperature; and then taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is stopped. By using the method, the charge state of the power battery can be intelligently controlled when the vehicle is parked, and even if the ambient temperature is reduced after the vehicle is parked, the residual electric quantity of the power battery is enough to control the engine to be started again; the problem that an engine cannot be started due to power failure of a power battery when an optimal economic control strategy is adopted in the prior art is solved to a great extent, and the mixed motor vehicle can still be normally started under the condition of long-time parking or sudden temperature drop.
On the basis of the above embodiments, modified embodiments of the above embodiments are proposed, and it is to be noted here that only the differences from the above embodiments are described in the modified embodiments for the sake of brevity of description.
Example two
Fig. 2 is a flow chart of a battery power management method for a hybrid vehicle according to a second embodiment of the present invention, where the second embodiment is optimized based on the above embodiment. In this embodiment, before S110 in the above embodiment and the lowest temperature of the environment where the power battery is located in the preset period is obtained, S200 may be further executed to query the weather temperature change condition in the preset period, and S110 may be further specified as: s211, determining the lowest temperature of the environment where the power battery is located in a preset period according to the weather temperature change condition.
As shown in fig. 2, a battery power management method for a hybrid vehicle according to a second embodiment of the present invention includes the following steps:
s200, inquiring weather temperature change conditions within a preset period.
Wherein, the background weather forecast inquiry can be carried out at least once every 6 hours to inquire the weather temperature change condition of a preset period (for example, 3 days in the future),
s211, determining the lowest temperature of the environment where the power battery is located in a preset period according to the weather temperature change condition.
In this embodiment, the minimum weather temperature in the preset period can be determined according to the queried weather temperature change condition in the preset period, where the minimum weather temperature is the minimum temperature of the environment where the power battery is located.
S220, determining the lowest charge state of the power battery required for starting the vehicle according to the lowest temperature.
And S230, taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
The specific implementation manners of S220 and S230 are the same as those in the foregoing embodiments, and are not repeated here. In addition, the present embodiment is not described in detail with reference to the first embodiment.
According to the battery power management method for the hybrid vehicle, which is provided by the embodiment of the invention, the lowest possible temperature of the power battery is determined according to the future weather forecast queried by the background networking of the vehicle, the determination mode of the lowest temperature is relatively direct and accurate, and the lowest state of charge of the power battery is further ensured to meet the power required by the engine when the engine is started at the lowest temperature.
Example III
In this embodiment, the temperature of the environment where the power battery is located and the starting power of the vehicle satisfy a first preset corresponding relationship, and the temperature of the environment where the power battery is located, the discharging power of the power battery, and the state of charge of the power battery satisfy a second preset corresponding relationship. S120 in the above embodiment, determining the lowest state of charge of the power battery required for starting the vehicle according to the lowest temperature may be further refined as follows: s321, determining starting power corresponding to the lowest temperature according to a first preset corresponding relation; s322, taking the discharge power equal to the starting power as the lowest discharge power, and determining the lowest charge state of the power battery corresponding to the lowest discharge power and the lowest temperature according to the second preset corresponding relation.
Specifically, fig. 3 is a flow chart of a battery power management method for a hybrid vehicle according to a third embodiment of the present invention, and referring to fig. 3, the battery power management method includes the following steps:
s310, acquiring the lowest temperature of the environment where the power battery is located in a preset period.
The preset time period is a time period from the current time to a future preset time. The specific implementation of this step is the same as that in the above embodiment, and will not be repeated here.
S321, determining starting power corresponding to the lowest temperature according to the first preset corresponding relation.
In general, as the ambient temperature decreases, the engine intake temperature decreases, the viscosity of the lubricating oil in the engine increases, the engine starting resistance increases, starting becomes more difficult, and the required starting power increases. In this embodiment, the first preset correspondence relationship between different temperatures of the environment where the power battery is located and the engine starting power (i.e., the vehicle starting power) may be pre-stored in the battery power management device.
Fig. 4 is a schematic diagram of a first preset corresponding relationship provided in the third embodiment of the present invention, and as shown in fig. 4, in the first preset corresponding relationship, the temperature of the environment where the power battery is located and the starting power of the vehicle are in a one-to-one corresponding relationship, and when the temperature is lower than 0 ℃, the starting power gradually increases with the decrease of the temperature. Wherein the values shown in fig. 4 are only examples and are not limiting of the temperature and start-up power values.
After the lowest temperature is determined, the starting power of the engine corresponding to the lowest temperature can be obtained by inquiring the first preset corresponding relation.
S322, taking the discharge power equal to the starting power as the lowest discharge power, and determining the lowest charge state of the power battery corresponding to the lowest discharge power and the lowest temperature according to the second preset corresponding relation.
The power battery has a fixed discharge power, and the inherent discharge power is related to the temperature of the environment where the power battery is located and the state of charge (residual capacity) of the power battery. In general, a decrease in temperature and/or a decrease in the remaining power of the power battery may cause a decrease in the discharge power of the power battery. In this embodiment, the battery power management device may pre-store different temperatures of the environment where the power battery is located, and second preset corresponding relations between different states of charge of the power battery and discharge power of the power battery.
Fig. 5 is a schematic diagram of a second preset correspondence relationship provided in the third embodiment of the present invention, as shown in fig. 5, where different discharge powers are corresponding to different temperatures and different states of charge under the second preset correspondence relationship. When the state of charge is greater than or equal to 50%, the temperature has little effect on the discharge power of the power battery, and when the state of charge is less than 50%, the discharge power gradually decreases along with the decrease of the temperature. The values shown in fig. 5 are only examples, and are not limited to the values of temperature, state of charge, and discharge power.
Further, when the discharge power of the power battery is greater than or equal to the start power of the engine, the engine can be started normally, so in this embodiment, the discharge power of the power battery equal to the start power of the engine corresponding to the lowest temperature is taken as the lowest discharge power, and after the lowest temperature and the lowest discharge power are determined, the lowest charge state of the corresponding power battery can be obtained by querying a second preset corresponding relationship.
For example, if it is found that the minimum temperature in three days in the future is-20 ℃ according to the weather forecast in three days in the future, the minimum starting power required by the engine is determined to be 3KW according to the first preset corresponding relation, and the minimum discharging power is 3KW. And determining that the state of charge of the power battery required for 3KW starting at the temperature of minus 20 ℃ is 10 percent according to the second preset corresponding relation, so that the lowest state of charge of 10 percent can be used as a control target, and the residual electric quantity of the power battery when the vehicle is controlled to stop is more than or equal to 10 percent.
In addition, it should be noted that, fig. 4 and fig. 5 only show values of several parameters by way of example, in the actual design process, the first preset corresponding relationship may include starting power corresponding to any temperature, and the second preset corresponding relationship may include discharging power under any temperature and any state of charge. Alternatively, the parameter values not shown in fig. 4 and 5 may be interpolated from the existing parameter values, which will not be described in detail in the present embodiment.
S330, taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
The specific implementation of this step is the same as that in the above embodiment, and will not be repeated here.
In this embodiment, the lowest state of charge of the power battery is determined by a table look-up method according to the first preset corresponding relationship and the second preset corresponding relationship, which is simple and convenient. And the first preset corresponding relation and the second preset corresponding relation can be updated by a vehicle maintainer through the background according to the vehicle use state, so that the accurate correspondence of each parameter is ensured.
The embodiment of the invention provides several specific implementation modes based on the technical scheme of each embodiment.
As a specific implementation manner of this implementation manner, after determining the minimum state of charge of the power battery required for starting the vehicle according to the minimum temperature in S120 in the foregoing embodiment, the method may further include: acquiring a target state of charge of a power battery under an existing state of charge control strategy; when the target state of charge is greater than the lowest state of charge at the lowest temperature, the target state of charge is taken as the lowest state of charge required for subsequent control, and when the target state of charge is less than or equal to the lowest state of charge at the lowest temperature, the lowest state of charge at the lowest temperature is still taken as the lowest state of charge required for subsequent control.
Under the setting mode, the state of charge of the power battery with larger value can be used as a control target, so that the residual electric quantity of the power battery can meet the requirement of restarting the engine when the vehicle is stopped.
Example IV
In the battery power management method of a hybrid vehicle provided in this embodiment, in the above embodiment, after taking the lowest state of charge as the target limit value and controlling the power battery of the vehicle to be greater than or equal to the lowest state of charge when the vehicle is parked, the following steps may be added: s440, acquiring the current electric quantity of the power battery after parking, a threshold temperature corresponding to the current electric quantity and the current temperature of the environment where the power battery is located; the threshold temperature is the lower limit temperature of the power battery required by restarting the vehicle under the current electric quantity; s450, when the current temperature is less than or equal to the threshold temperature, controlling the vehicle self-starting engine to charge the power battery.
Fig. 6 is a flowchart of a battery power management method for a hybrid vehicle according to a fourth embodiment of the present invention, where, as shown in fig. 6, the battery power management method includes:
s410, acquiring the lowest temperature of the environment where the power battery is located in a preset period.
The preset time period is a time period from the current time to a future preset time.
S420, determining the lowest charge state of the power battery required for starting the vehicle according to the lowest temperature.
S430, taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
The specific implementation manner of the above steps is the same as that of the above embodiments, and will not be repeated here.
S440, acquiring the current electric quantity of the power battery after parking, the threshold temperature corresponding to the current electric quantity and the current temperature of the environment where the power battery is located.
The threshold temperature is the lower limit temperature of the power battery required for restarting the vehicle under the current electric quantity.
If the temperature is further reduced or the environmental temperature is lower than the originally determined minimum temperature due to sudden weather changes when the vehicle is parked for a long time, the minimum state of charge of the power battery may not meet the actual low-temperature requirement, and further the risk that the engine cannot be started also exists. In order to avoid the above problems, in this embodiment, after the vehicle is parked, the current electric quantity of the power battery after parking can be obtained, which can also be understood as the real-time state of charge in the parked state of the vehicle. While determining the lower limit temperature of the power battery required to control the restarting of the engine (vehicle) at the current electric quantity. In combination with fig. 4 and fig. 5 in the third embodiment, the temperature required for starting the power battery corresponding to the current electric quantity (state of charge) (i.e., the current temperature) can be determined through the first preset corresponding relationship and the second preset corresponding relationship, for example, when the current electric quantity is 10%, the minimum temperature is-20 ℃, and the threshold temperature corresponding to 10% is-20 ℃. Meanwhile, the current temperature of the environment where the power battery is located, namely the real-time weather temperature in the parking state of the vehicle, can be obtained and determined.
S450, when the current temperature is less than or equal to the threshold temperature, controlling the vehicle self-starting engine to charge the power battery.
Further, if the current temperature of the power battery is continuously reduced when the vehicle is parked, the remaining power of the power battery may be reduced continuously, so as to avoid the continuous reduction of the power battery power.
As a specific refinement of the fourth embodiment, in an alternative embodiment, when the current temperature is less than or equal to the threshold temperature, the vehicle self-starting engine is controlled to charge the power battery, which may be thinned: when the current temperature is equal to the threshold temperature, controlling the vehicle to enter an engine preparation starting state; when the vehicle meets the self-starting charging condition, the current temperature is smaller than the threshold temperature, and the difference value between the threshold temperature and the current temperature is larger than or equal to the preset temperature difference value, the self-starting engine of the vehicle is controlled to charge the power battery; the self-starting charging conditions include: the vehicle fuel tank fuel level is greater than a fuel level threshold, the cabin cover of the vehicle engine is in a closed state, the vehicle door is in a locked state, and the vehicle key is not in the vicinity of the vehicle.
Specifically, in this embodiment, when it is detected that the current temperature at which the power battery is located is reduced to be equal to the threshold temperature, it may be controlled to enter the engine ready-to-start state; and under the condition that the engine is ready to be started, controlling the vehicle to perform self-checking, and judging whether the vehicle meets the self-starting charging condition according to the self-checking result. After the vehicle is judged to meet the self-starting condition, if the current temperature of the power battery is continuously reduced to be lower than the threshold temperature (or lower than the threshold temperature by a certain value, for example, lower than the threshold temperature by 2 ℃), the engine is controlled to be started to charge the power battery.
Wherein, the self-checking project includes: whether the vehicle fuel tank fuel level is greater than a fuel level threshold, whether the cabin cover of the vehicle engine is in a closed state, whether the vehicle door is in a locked state, and whether the vehicle key is not in the vicinity of the vehicle. When the vehicle meets the self-starting charging conditions that the oil quantity of the oil tank of the vehicle is larger than the oil quantity threshold, the engine cabin cover of the vehicle engine is in a closed state, the vehicle door is in a locking state and the vehicle key is not in the vicinity of the vehicle, the double-flash lamp of the vehicle can be controlled to be started, and the engine is started to charge the power battery after a delay of a few seconds. If the vehicle does not meet any self-starting charging condition, the engine is exited from the ready-to-start state, and the current temperature is not monitored.
In the process of charging the power battery by using the engine, an appropriate charging power can be selected according to the performance of the power battery and/or the engine, and the specific implementation manner of the step can be set by a person skilled in the art according to actual requirements.
In this embodiment, the vehicle is self-inspected, and under the condition that the vehicle meets the self-starting charging condition, the engine is started to charge the power battery, so that the normal application of the engine is not influenced after the engine charges the power battery, the potential safety hazard in the self-starting charging process can be avoided, and the vehicle and personal safety are ensured.
Optionally, as a specific refinement of the fourth embodiment, in another alternative embodiment, after controlling the vehicle self-starting engine to charge the power battery, the method further includes: stopping charging the power battery when the current electric quantity of the power battery is increased to be greater than or equal to the target electric quantity; the target electric quantity is the electric quantity required by the starting of the vehicle at the current temperature.
Specifically, in the self-starting charging process, when the real-time electric quantity of the power battery is detected to be increased to be greater than the target electric quantity required by starting the automobile at the current temperature, the engine can be controlled to stop, the self-starting charging mode is exited, and the power battery is not charged any more. For example, when the current temperature is less than-20 ℃, if the current charge of the power battery is increased to 20%, the self-starting charging mode can be deduced.
Further, after the engine is stopped, the current temperature of the environment where the power battery is located can be continuously monitored, if the current temperature is lower than the threshold temperature corresponding to the target electric quantity (namely the current electric quantity after charging) again, the self-starting charging mode is entered, and the power battery is charged by the engine.
In addition, it should be noted that, in general, after the engine is used to charge the power battery 1-2 times, the power battery power can meet the starting requirement, and if the number of times of self-starting charging is too large, it is indicated that the vehicle engine and/or the power battery and/or other components of the vehicle may be abnormal. Therefore, as a preferred embodiment, if the number of times of self-starting charging exceeds two in the same parking period, the current temperature is not monitored after the completion of the second time of self-starting charging, the self-starting charging mode is not entered, and a prompt is made through a man-machine interaction module in the vehicle.
Optionally, in a possible embodiment, before obtaining the minimum temperature of the environment in which the power battery is located within the preset period of time, the method further includes: acquiring a navigation address input by a user; the navigation address is determined to be a non-chargeable address.
In general, a user may start a navigation function before driving a vehicle, and in this embodiment, after the vehicle starts navigation, it may be determined whether a navigation address input by the user is a chargeable address. If the navigation address is a chargeable address, the battery electric quantity management method provided by the first, second or third embodiment of the invention is not executed, and the battery electric quantity is still controlled according to the existing state of charge control strategy; if the navigation address is an uncharged address or an ambiguous chargeable address, the battery power management method provided by the embodiment of the invention is executed.
In addition, the user can manually maintain the ambiguous chargeable address, namely, the user can customize the ambiguous chargeable address on the map to determine whether the chargeable address can be charged.
Optionally, in a possible embodiment, the user may set the lowest state of charge of the power battery according to his own judgment, and the battery power management device compares the user-set value with the lowest state of charge automatically determined in the above embodiment, and selects the larger state of charge value of the two as the new lowest state of charge. For example, when the user judges that the vehicle is to be parked for a long time, a higher lowest state of charge can be set, so that the problem that the engine cannot be started due to electric quantity reduction caused by long-time parking is avoided.
In addition, the battery power management device can provide reasonable setting suggestions for users according to the power battery power consumption speed of the vehicle under different parking times. For example, in the vehicle specification, it is indicated that the lowest state of charge should be set when the user intends to rest the vehicle for 1 to 12 months, respectively.
Example five
Fig. 7 is a schematic structural diagram of a battery power management device for a hybrid vehicle according to a fifth embodiment of the present invention, where the device may be used to execute the battery power management method for a hybrid vehicle according to any embodiment of the present invention. As shown in fig. 7, the apparatus includes:
The minimum temperature acquisition module 100 is used for acquiring the minimum temperature of the environment where the power battery is located within a preset period; the preset time period is a time period from the current time to a future preset time;
a minimum state of charge determination module 200 for determining a minimum state of charge of the power battery required for vehicle start based on a minimum temperature;
the control module 300 is configured to control the electric quantity of the power battery to be greater than or equal to the minimum state of charge when the vehicle is parked, with the minimum state of charge as a target limit value.
The battery power management device for the hybrid vehicle provided by the embodiment can intelligently control the charge state of the power battery when the vehicle is parked, and even if the ambient temperature is reduced after the vehicle is parked, the residual power of the power battery is enough to control the engine to be restarted; the problem that an engine cannot be started due to power failure of a power battery when an optimal economic control strategy is adopted in the prior art is solved to a great extent, and the mixed motor vehicle can be normally started under the condition of long-time parking or sudden temperature drop.
Further, in a possible embodiment, the battery power management device of the hybrid vehicle may further include: the weather temperature change condition query module is used for querying weather temperature change conditions in a preset period; the minimum temperature acquisition module is particularly used for determining the minimum temperature of the environment where the power battery is located in a preset period according to the weather temperature change condition.
Further, in a possible embodiment, the lowest state of charge determination module may comprise a start-up power determination unit and a lowest state of charge determination unit. The starting power determining unit is used for determining the starting power corresponding to the lowest temperature according to the first preset corresponding relation; the minimum state of charge determining unit is used for taking the discharge power equal to the starting power as the minimum discharge power and determining the minimum state of charge of the power battery corresponding to the minimum discharge power and the minimum temperature according to a second preset corresponding relation.
Further, in a possible embodiment, the battery power management device of the hybrid vehicle may further include: the parking parameter acquisition module and the self-starting charging module. The parking parameter acquisition module is used for acquiring the current electric quantity of the power battery after parking, the threshold temperature corresponding to the current electric quantity and the current temperature of the environment where the power battery is located; the threshold temperature is the lower limit temperature of the power battery required by restarting the vehicle under the current electric quantity; and when the current temperature is less than or equal to the threshold temperature, the self-starting charging module controls the self-starting engine of the vehicle to charge the power battery.
Further, in a possible embodiment, the self-starting charging module may be further configured to control the vehicle to enter the engine-ready-to-start state when the current temperature is equal to the threshold temperature; when the vehicle meets the self-starting charging condition, the current temperature is smaller than the threshold temperature, and the difference value between the threshold temperature and the current temperature is larger than or equal to the preset temperature difference value, the self-starting engine of the vehicle is controlled to charge the power battery; the self-starting charging conditions include: the vehicle fuel tank fuel level is greater than a fuel level threshold, the cabin cover of the vehicle engine is in a closed state, the vehicle door is in a locked state, and the vehicle key is not in the vicinity of the vehicle.
Further, in a possible embodiment, the battery power management device of the hybrid vehicle may further include a self-starting charge stopping module for stopping charging the power battery when the current power level of the power battery increases to be greater than or equal to the target power level; the target electric quantity is the electric quantity required by the starting of the vehicle at the current temperature.
Further, in a possible embodiment, the battery power management device of the hybrid vehicle may further include a navigation address acquisition module and a navigation address determination module. The navigation address acquisition module is used for acquiring a navigation address input by a user; the navigation address judging module is used for determining the navigation address as a non-chargeable address.
The battery power management device for a hybrid vehicle can execute the battery power management method for a hybrid vehicle provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method, and the description is not given here.
Example six
An embodiment of the present invention provides a hybrid vehicle, including: one or more processors and storage devices; the processor in the hybrid vehicle may be one or more; the storage device is used for storing one or more programs; the one or more programs are executed by the one or more processors to cause the one or more processors to implement a method for battery level management of a hybrid vehicle as provided by any embodiment of the present invention. The hybrid vehicle may be any type of hybrid vehicle, such as, but not limited to, an extended range hybrid vehicle.
The storage device in the hybrid vehicle is used as a computer readable storage medium for storing one or more programs, which may be software programs, computer executable programs, and modules. The processor executes various functional applications and data processing of the hybrid vehicle by running the software programs, instructions and modules stored in the storage device, that is, implements the battery power management method of the hybrid vehicle in the above method embodiment.
The storage device may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the hybrid vehicle, or the like. Further, the storage means may comprise high speed random access memory, and may also comprise non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device may further include a memory remotely located with respect to the processor, the remote memory being connectable to the hybrid vehicle via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Example seven
A seventh embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program for executing the battery power management method of the hybrid vehicle provided by any embodiment of the present invention when executed by a processor.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to: electromagnetic signals, optical signals, or any suitable combination of the preceding. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio frequency (RadioFrequency, RF), and the like, or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A battery power management method of a hybrid vehicle, comprising:
acquiring the lowest temperature of the environment where the power battery is located within a preset period; the preset time period is a time period from the current time to a future preset time;
determining a minimum state of charge of the power battery required for starting the vehicle according to the minimum temperature;
and taking the lowest state of charge as a target limit value, and controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked.
2. The battery power management method of a hybrid vehicle according to claim 1, further comprising, before acquiring the lowest temperature of the environment in which the power battery is located within the preset period of time:
Inquiring weather temperature change conditions in the preset period;
obtaining the lowest temperature of the environment where the power battery is located in a preset period of time comprises the following steps:
and determining the lowest temperature of the environment where the power battery is located in the preset period according to the weather temperature change condition.
3. The battery power management method of a hybrid vehicle according to claim 1, wherein a temperature of an environment in which the power battery is located and a starting power of the vehicle satisfy a first preset correspondence, and a temperature of the environment in which the power battery is located, a discharge power of the power battery, and a state of charge of the power battery satisfy a second preset correspondence;
determining a minimum state of charge of the power battery required for vehicle start-up based on the minimum temperature, comprising:
determining the starting power corresponding to the lowest temperature according to the first preset corresponding relation;
and taking the discharge power equal to the starting power as the lowest discharge power, and determining the lowest charge state of the power battery corresponding to the lowest discharge power and the lowest temperature according to the second preset corresponding relation.
4. The battery charge management method of a hybrid vehicle according to claim 1, characterized by further comprising, after taking the lowest state of charge as a target limit value, controlling the power battery to have a charge of the power battery greater than or equal to the lowest state of charge when the vehicle is stopped:
Acquiring the current electric quantity of the power battery after parking, a threshold temperature corresponding to the current electric quantity and the current temperature of the environment where the power battery is located; the threshold temperature is the lower limit temperature of the power battery required by restarting the vehicle under the current electric quantity;
and when the current temperature is less than or equal to the threshold temperature, controlling a vehicle self-starting engine to charge the power battery.
5. The battery charge management method of a hybrid vehicle of claim 4, wherein controlling a vehicle self-starting engine to charge the power battery when the current temperature is less than or equal to the threshold temperature comprises:
when the current temperature is equal to the threshold temperature, controlling the vehicle to enter an engine preparation starting state;
when the vehicle meets the self-starting charging condition, the current temperature is smaller than the threshold temperature, and the difference value between the threshold temperature and the current temperature is larger than or equal to a preset temperature difference value, controlling a self-starting engine of the vehicle to charge the power battery; the self-starting charging condition includes: the vehicle fuel tank fuel level is greater than a fuel level threshold, the cabin cover of the vehicle engine is in a closed state, the vehicle door is in a locked state, and the vehicle key is not in the vicinity of the vehicle.
6. The battery charge management method of a hybrid vehicle according to claim 4, further comprising, after controlling a vehicle self-starting engine to charge the power battery:
stopping charging the power battery when the current electric quantity of the power battery is increased to be greater than or equal to the target electric quantity; the target electric quantity is the electric quantity required by starting the vehicle at the current temperature.
7. The battery power management method of a hybrid vehicle according to claim 1, further comprising, before acquiring the lowest temperature of the environment in which the power battery is located within the preset period of time:
acquiring a navigation address input by a user;
the navigation address is determined to be a non-chargeable address.
8. A battery power management apparatus of a hybrid vehicle, comprising:
the minimum temperature acquisition module is used for acquiring the minimum temperature of the environment where the power battery is located in a preset period; the preset time period is a time period from the current time to a future preset time;
a minimum state of charge determining module configured to determine a minimum state of charge of the power battery required for vehicle start according to the minimum temperature;
and the control module is used for controlling the electric quantity of the power battery to be larger than or equal to the lowest state of charge when the vehicle is parked by taking the lowest state of charge as a target limit value.
9. A hybrid vehicle, characterized by comprising:
one or more processors;
a storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the battery level management method of a hybrid vehicle as set forth in any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the battery level management method of a hybrid vehicle according to any one of claims 1 to 7.
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| CN202310587294.1A CN116572931A (en) | 2023-05-23 | 2023-05-23 | Battery electric quantity management method and device for hybrid vehicle, vehicle and medium |
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| CN202310587294.1A CN116572931A (en) | 2023-05-23 | 2023-05-23 | Battery electric quantity management method and device for hybrid vehicle, vehicle and medium |
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