CN119527049B - New energy vehicle solar charging method and device - Google Patents
New energy vehicle solar charging method and deviceInfo
- Publication number
- CN119527049B CN119527049B CN202411925740.6A CN202411925740A CN119527049B CN 119527049 B CN119527049 B CN 119527049B CN 202411925740 A CN202411925740 A CN 202411925740A CN 119527049 B CN119527049 B CN 119527049B
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- battery pack
- capacity
- charging
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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
- B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
- B60L8/003—Converting light into electric energy, e.g. by using photo-voltaic systems
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—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]
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The application discloses a solar charging method and device for a new energy vehicle, and relates to the technical field of automobiles, wherein the solar charging method for the new energy vehicle comprises the following steps of obtaining the photoelectric conversion efficiency of a solar photovoltaic panel; and according to the relation between the residual capacity of the battery pack and the capacity threshold, determining to charge the power battery pack and/or the electric device, and determining to charge the power battery pack and/or the electric device by the relation between the photoelectric conversion efficiency of the solar photovoltaic panel and the residual capacity of the battery pack and the capacity threshold, the solar charging of the power battery pack and/or the electric device can be performed when the ground charging equipment is insufficient, the photoelectric conversion efficiency is sufficient and the battery electric quantity is insufficient, so that the solar charging can be performed for the new energy vehicle, the vehicle can be charged timely, and the charging pressure of the new energy vehicle is reduced.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a solar charging method and device for a new energy vehicle.
Background
The ground direct current charging pile, the alternating current charging pile and the wireless charging equipment are in butt joint with the whole car, so that the whole car can be charged. However, the three charging modes depend on ground charging equipment or ground power supply equipment, and are not suitable for charging scenes of outdoor ground-lack charging equipment or ground power supply equipment. Under outdoor no charging equipment, or holiday charging equipment demand is suddenly increased, the electric car cannot be timely charged, and the charging experience of the electric car is affected.
Disclosure of Invention
The application provides a solar charging method and device for a new energy vehicle, which aim to solve the problem that the vehicle cannot be charged in time.
In a first aspect, the present application provides a solar charging method for a new energy vehicle, including the steps of:
If the photoelectric conversion efficiency of the solar photovoltaic panel is greater than or equal to the photoelectric conversion efficiency threshold value, the residual capacity of the battery pack is obtained;
and determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
According to the application, solar charging is carried out on the power battery pack and/or the power utilization device through the relation between the photoelectric conversion efficiency of the solar photovoltaic panel and the residual capacity of the battery pack and the capacity threshold value, so that the solar charging can be carried out on the new energy vehicle when ground charging equipment is insufficient, the photoelectric conversion efficiency is sufficient and the battery electric quantity is insufficient, the vehicle is timely charged, and the charging pressure of the new energy vehicle is reduced.
The solar charging can be performed when the remaining capacity of the battery pack is below the capacity threshold, the remaining capacity of the battery pack can be generally set to 20% -90% of the capacity threshold, and the solar charging of the battery pack or the electric device is started when the remaining capacity of the battery pack is below 20% of the capacity threshold, because when the remaining capacity of the battery pack is below 20% of the capacity threshold, for example, 10%, the solar charging is performed again, various disadvantages exist, such as large charging amount, long consumed time, influence on the cruising of the vehicle, and rapid light consumption of the vehicle electric quantity may be caused when the progress of the solar charging is slower than the electric quantity consumption speed of the vehicle, and influence on the driving experience. When the residual capacity of the battery pack is above 90% of the capacity threshold, photovoltaic charging is started, so that when the vehicle brakes or descends, enough space is not reserved for energy feedback, therefore, the residual capacity of the battery pack is 20% -90% of the capacity threshold, and more preferably, the residual capacity of the battery pack is 50% -70% of the capacity threshold, the influence on the vehicle endurance can be reduced, and sufficient space can be provided for energy feedback.
Before the photovoltaic charging, it is first determined whether the photovoltaic system can work normally without failure, then whether the whole vehicle works normally without failure, and the photovoltaic charging is performed according to the corresponding conditions under the condition that the photovoltaic system and the whole vehicle have no failure.
In some embodiments, the obtaining the photovoltaic conversion efficiency of the solar photovoltaic panel comprises:
Acquiring illumination intensity and an included angle between the sunlight incidence direction and the photovoltaic panel;
and obtaining the photoelectric conversion efficiency of the solar photovoltaic panel according to the illumination intensity and the included angle between the sunlight incidence direction and the photovoltaic panel.
The photoelectric conversion efficiency of the solar photovoltaic panel is related to the illumination intensity and the included angle between the sunlight incident direction and the photovoltaic panel, and specifically, the calculation formula of the photoelectric conversion efficiency is as follows:
η=V*I*F/(P*S),
Where η is photoelectric conversion efficiency, V is open-circuit voltage, I is current that the solar photovoltaic panel can output through 1 short-circuit load, I is a ratio of output power of the solar photovoltaic panel to product of the short-circuit current and the open-circuit voltage, P is energy density of incident solar light, i.e. illumination intensity, and S is a surface area of an irradiated area of the solar photovoltaic panel converted to be perpendicular to an incident direction of solar light.
The included angle is generally within the range of 15-85 degrees, the illumination intensity is within the range of 600-1000W/m 2, and the solar photovoltaic panel has good photoelectric conversion efficiency.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
acquiring current output by a solar panel and rated charging current of a battery pack;
If the ratio of the current output by the solar panel to the rated charging current of the battery pack is greater than a ratio threshold;
and determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
According to the ratio of the current output by the solar panel to the rated charging current of the battery pack, whether the vehicle is charged by solar energy is confirmed, the efficiency of solar energy charging can be improved, the new energy vehicle can be charged only when the current output by the solar panel is enough and the charging time for charging the battery is in a proper range, the efficiency of solar energy charging can be improved, and the low-efficiency long-time solar energy charging is reduced. The ratio threshold value of the current output by the solar panel to the rated charging current of the battery pack is 5% -10%.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
obtaining a bus voltage value and a photovoltaic boosting output voltage value of a battery pack;
and if the bus voltage value of the battery pack is smaller than the photovoltaic boosting output voltage value, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
Generally, only the equipment with high voltage value can be charged with low voltage value, therefore, photovoltaic charging can be realized only when the bus voltage value of the battery pack is smaller than the photovoltaic boost output voltage value, namely the photovoltaic boost output voltage value is high and the bus voltage value of the battery pack is low by acquiring the bus voltage value and the photovoltaic boost output voltage value of the battery pack and comparing the bus voltage value and the photovoltaic boost output voltage value.
The working principle of the photovoltaic boosting is that the output voltage of the photovoltaic system is boosted to the bus voltage of the battery pack through a boosting DC/DC voltage converter.
In some embodiments, the obtaining the bus voltage value and the photovoltaic boost output voltage value of the battery pack includes:
acquiring an output voltage of a solar photovoltaic panel and a photovoltaic boosting input voltage threshold;
And if the output voltage of the solar photovoltaic panel is greater than or equal to the photovoltaic boosting input voltage threshold value, acquiring a bus voltage value and a photovoltaic boosting output voltage value of the battery pack.
The photovoltaic boosting has a certain working voltage interval, and only when the output voltage of the solar photovoltaic panel is greater than or equal to the threshold value of the photovoltaic boosting input voltage, namely the minimum value of the interval, the photovoltaic boosting can be performed, the battery pack is charged, and the minimum value of the photovoltaic boosting input voltage is the lowest output voltage of the photovoltaic system.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
Acquiring a discharge state of a battery pack;
If the battery pack is in a non-discharge state, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
The battery pack has a charge state and a discharge state, and thus it is necessary to acquire the discharge state of the battery pack, and charge the battery pack in a non-discharge state. It should be noted that, solar charging may be charging in a parking mode or charging in a driving mode, when charging in the parking mode, the battery pack is usually discharged in an air conditioner on state, and in this case, photovoltaic may be used to supply power to the air conditioner, and the redundant electric quantity supplies power to the battery pack, while the battery pack does not separately supply power to the air conditioner. When charging in the drive mode, the battery pack is typically required to provide power for the vehicle and to power the air conditioning system, and in order to charge the battery pack, the power of the vehicle and the energy consumption of the air conditioner may be provided by solar energy, with the battery pack being charged only.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
acquiring the charging state of a battery pack;
And if the battery pack is in a non-charging state, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
Because the battery pack has multiple charging modes, such as charging pile charging, wireless charging, energy feedback charging and photovoltaic charging, but only one charging mode can be used for charging at a time, before solar charging, whether the battery pack has other forms of charging needs to be judged, and if not, solar charging can be performed.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
If the residual capacity of the battery pack is smaller than the first capacity threshold, solar charging is carried out on the battery pack;
obtaining the residual capacity of a battery pack;
If the residual capacity of the battery pack is larger than the second capacity threshold value, stopping solar charging of the battery pack;
Wherein the second capacity threshold is greater than the first capacity threshold.
When the residual capacity of the battery pack is smaller than the first capacity threshold, the current residual capacity of the battery pack is indicated to possibly influence the cruising, solar charging is needed to be carried out on the battery pack, when the residual capacity of the battery pack after charging is larger than the second capacity threshold, the residual capacity of the battery pack is indicated to not influence the cruising mileage, a storage space can be reserved for energy feedback at the moment, and solar charging on the battery pack is stopped. Typically, the first capacity threshold is 30% -50% of the total capacity of the battery pack, and the second capacity threshold is 60% -90% of the total capacity of the battery pack.
In some embodiments, determining solar charging of the power pack and/or the powered device based on the remaining capacity of the pack versus the capacity threshold comprises:
If the residual capacity of the battery pack is smaller than the third capacity threshold value, solar charging is preferably carried out on the battery pack;
if the residual capacity of the battery pack is larger than the fourth capacity threshold value, solar charging is preferentially carried out on the electric device;
If the residual capacity of the battery pack is larger than or equal to the third capacity threshold and smaller than or equal to the fourth capacity threshold, solar charging is carried out on the battery pack and the power utilization device at the same time;
wherein the third capacity threshold is less than the fourth capacity threshold.
When the battery pack and the electricity utilization device are required to be charged at the same time in solar charging, the residual capacity of the current battery pack and the electricity utilization requirement of the electric equipment are required to be comprehensively considered, the residual capacity of the battery pack is smaller than a third capacity threshold, the endurance is influenced, and the battery pack is charged preferentially at the moment. When the remaining capacity of the battery pack is greater than the fourth capacity threshold, the remaining capacity of the battery pack is indicated not to affect the cruising duration, and the electric device can be charged with priority. When the remaining capacity of the battery pack is greater than or equal to the third capacity threshold and less than or equal to the fourth capacity threshold, the remaining capacity of the battery pack is not particularly sufficient although the endurance is not affected, and at this time, solar charging can be performed on the battery pack and the power utilization device at the same time, so that the solar charging efficiency is improved. Typically the third capacity threshold is 20% of the total battery pack capacity and the fourth capacity threshold is 40% of the total battery pack capacity.
It should be noted that, when the battery pack is sufficient and the photoelectric conversion efficiency of the solar energy is sufficient, the solar charging may also charge a 12V auxiliary battery in the vehicle, such as a lead-acid battery or a display screen battery.
It should be noted that, when the photovoltaic charging is finished, the charging may reach the battery capacity threshold, for example, 90% -95% of the total capacity, and the photovoltaic charging is finished, and meanwhile, an energy storage space is provided for energy feedback.
In a second aspect, the present application provides a new energy vehicle solar charging apparatus, comprising:
an acquisition unit for acquiring a remaining capacity of the battery pack, and
And the control unit is used for determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 2 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 3 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 4 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 5 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 6 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 7 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 8 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 9 is a flowchart of a solar charging method for a new energy vehicle according to an embodiment of the application.
Fig. 10 is a schematic diagram of a solar charging device for a new energy vehicle according to an embodiment of the application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The ground direct current charging pile, the alternating current charging pile and the wireless charging equipment are in butt joint with the whole car, so that the whole car can be charged. However, the three charging modes depend on ground charging equipment or ground power supply equipment, and are not suitable for charging scenes of outdoor ground-lack charging equipment or ground power supply equipment. Under outdoor no charging equipment, or holiday charging equipment demand is suddenly increased, the electric car cannot be timely charged, and the charging experience of the electric car is affected.
In view of the above, the application provides a solar charging method and device for a new energy vehicle, which are used for solving the problem that the vehicle cannot be charged in time.
In a first aspect, as shown in fig. 1, the present application provides a solar charging method for a new energy vehicle, including the following steps:
s100, if the photoelectric conversion efficiency of the solar photovoltaic panel is greater than or equal to a photoelectric conversion efficiency threshold value, acquiring the residual capacity of the battery pack;
And S200, determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
According to the application, solar charging is carried out on the power battery pack and/or the power utilization device through the relation between the photoelectric conversion efficiency of the solar photovoltaic panel and the residual capacity of the battery pack and the capacity threshold value, so that the solar charging can be carried out on the new energy vehicle when ground charging equipment is insufficient, the photoelectric conversion efficiency is sufficient and the battery electric quantity is insufficient, the vehicle is timely charged, and the charging pressure of the new energy vehicle is reduced.
The solar charging can be performed when the remaining capacity of the battery pack is below the capacity threshold, the remaining capacity of the battery pack can be generally set to 20% -90% of the capacity threshold, and the solar charging of the battery pack or the electric device is started when the remaining capacity of the battery pack is below 20% of the capacity threshold, because when the remaining capacity of the battery pack is below 20% of the capacity threshold, for example, 10%, the solar charging is performed again, various disadvantages exist, such as large charging amount, long consumed time, influence on the cruising of the vehicle, and rapid light consumption of the vehicle electric quantity may be caused when the progress of the solar charging is slower than the electric quantity consumption speed of the vehicle, and influence on the driving experience. When the residual capacity of the battery pack is above 90% of the capacity threshold, photovoltaic charging is started, so that when the vehicle brakes or descends, enough space is not reserved for energy feedback, therefore, the residual capacity of the battery pack is 20% -90% of the capacity threshold, and more preferably, the residual capacity of the battery pack is 50% -70% of the capacity threshold, the influence on the vehicle endurance can be reduced, and sufficient space can be provided for energy feedback.
Before the photovoltaic charging, it is first determined whether the photovoltaic system can work normally without failure, then whether the whole vehicle works normally without failure, and the photovoltaic charging is performed according to the corresponding conditions under the condition that the photovoltaic system and the whole vehicle have no failure.
With reference to the first aspect, as shown in fig. 2, in some embodiments provided by the present application, the obtaining the photoelectric conversion efficiency of the solar photovoltaic panel includes:
s101, acquiring illumination intensity and an included angle between the incident direction of sunlight and a photovoltaic panel;
s102, obtaining the photoelectric conversion efficiency of the solar photovoltaic panel according to the illumination intensity and the included angle between the sunlight incidence direction and the photovoltaic panel.
The photoelectric conversion efficiency of the solar photovoltaic panel is related to the illumination intensity and the included angle between the sunlight incident direction and the photovoltaic panel, and specifically, the calculation formula of the photoelectric conversion efficiency is as follows:
η=V*I*F/(P*S),
Where η is photoelectric conversion efficiency, V is open-circuit voltage, I is current that the solar photovoltaic panel can output through 1 short-circuit load, I is a ratio of output power of the solar photovoltaic panel to product of the short-circuit current and the open-circuit voltage, P is energy density of incident solar light, i.e. illumination intensity, and S is a surface area of an irradiated area of the solar photovoltaic panel converted to be perpendicular to an incident direction of solar light.
The included angle is generally within the range of 15-85 degrees, the illumination intensity is within the range of 600-1000W/m 2, and the solar photovoltaic panel has good photoelectric conversion efficiency.
With reference to the first aspect, as shown in fig. 3, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
s201, acquiring current output by a solar panel and rated charging current of a battery pack;
S202, if the ratio of the current output by the solar panel to the rated charging current of the battery pack is greater than a ratio threshold;
And S203, determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
According to the ratio of the current output by the solar panel to the rated charging current of the battery pack, whether the vehicle is charged by solar energy is confirmed, the efficiency of solar energy charging can be improved, the new energy vehicle can be charged only when the current output by the solar panel is enough and the charging time for charging the battery is in a proper range, the efficiency of solar energy charging can be improved, and the low-efficiency long-time solar energy charging is reduced. The ratio threshold value of the current output by the solar panel to the rated charging current of the battery pack is 5% -10%.
With reference to the first aspect, as shown in fig. 4, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
s204, obtaining a bus voltage value and a photovoltaic boosting output voltage value of the battery pack;
And S205, if the bus voltage value of the battery pack is smaller than the photovoltaic boosting output voltage value, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
Generally, only the equipment with high voltage value can be charged with low voltage value, therefore, photovoltaic charging can be realized only when the bus voltage value of the battery pack is smaller than the photovoltaic boost output voltage value, namely the photovoltaic boost output voltage value is high and the bus voltage value of the battery pack is low by acquiring the bus voltage value and the photovoltaic boost output voltage value of the battery pack and comparing the bus voltage value and the photovoltaic boost output voltage value.
The working principle of the photovoltaic boosting is to boost the output voltage of the photovoltaic system to the voltage of the bus of the battery pack through a boosting DC/DC voltage converter.
With reference to the first aspect, as shown in fig. 5, in some embodiments provided by the present application, the obtaining a bus voltage value and a photovoltaic boost output voltage value of the battery pack includes:
s2041, obtaining output voltage of a solar photovoltaic panel and a photovoltaic boosting input voltage threshold;
S2042, if the output voltage of the solar photovoltaic panel is greater than or equal to the photovoltaic boosting input voltage threshold value, obtaining a bus voltage value and a photovoltaic boosting output voltage value of the battery pack.
The photovoltaic boosting has a certain working voltage interval, and only when the output voltage of the solar photovoltaic panel is greater than or equal to the threshold value of the photovoltaic boosting input voltage, namely the minimum value of the interval, the photovoltaic boosting can be performed, the battery pack is charged, and the minimum value of the photovoltaic boosting input voltage is the lowest output voltage of the photovoltaic system.
With reference to the first aspect, as shown in fig. 6, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
S206, acquiring a discharge state of the battery pack;
and S207, if the battery pack is in a non-discharge state, determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
The battery pack has a charge state and a discharge state, and thus it is necessary to acquire the discharge state of the battery pack, and charge the battery pack in a non-discharge state. It should be noted that, solar charging may be charging in a parking mode or charging in a driving mode, when charging in the parking mode, the battery pack is usually discharged in an air conditioner on state, and in this case, photovoltaic may be used to supply power to the air conditioner, and the redundant electric quantity supplies power to the battery pack, while the battery pack does not separately supply power to the air conditioner. When charging in the drive mode, the battery pack is typically required to provide power for the vehicle and to power the air conditioning system, and in order to charge the battery pack, the power of the vehicle and the energy consumption of the air conditioner may be provided by solar energy, with the battery pack being charged only.
With reference to the first aspect, as shown in fig. 7, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
S208, acquiring the charging state of the battery pack;
And S209, if the battery pack is in a non-charging state, determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
Because the battery pack has multiple charging modes, such as charging pile charging, wireless charging, energy feedback charging and photovoltaic charging, but only one charging mode can be used for charging at a time, before solar charging, whether the battery pack has other forms of charging needs to be judged, and if not, solar charging can be performed.
With reference to the first aspect, as shown in fig. 8, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
s210, if the residual capacity of the battery pack is smaller than a first capacity threshold, solar charging is conducted on the battery pack;
S211, acquiring the residual capacity of the battery pack;
s212, stopping solar charging of the battery pack if the residual capacity of the battery pack is greater than a second capacity threshold;
Wherein the second capacity threshold is greater than the first capacity threshold.
When the residual capacity of the battery pack is smaller than the first capacity threshold, the current residual capacity of the battery pack is indicated to possibly influence the cruising, solar charging is needed to be carried out on the battery pack, when the residual capacity of the battery pack after charging is larger than the second capacity threshold, the residual capacity of the battery pack is indicated to not influence the cruising mileage, a storage space can be reserved for energy feedback at the moment, and solar charging on the battery pack is stopped. Typically, the first capacity threshold is 30% -50% of the total capacity of the battery pack, and the second capacity threshold is 60% -90% of the total capacity of the battery pack.
With reference to the first aspect, as shown in fig. 9, in some embodiments provided by the present application, the determining solar charging the power battery pack and/or the electric device according to the relationship between the remaining capacity of the battery pack and the capacity threshold includes:
s213, if the residual capacity of the battery pack is smaller than the third capacity threshold, solar charging is preferentially performed on the battery pack;
S214, if the residual capacity of the battery pack is larger than a fourth capacity threshold, solar charging is preferentially carried out on the electric device;
S215, if the residual capacity of the battery pack is greater than or equal to the third capacity threshold and less than or equal to the fourth capacity threshold, solar charging is carried out on the battery pack and the power utilization device at the same time;
wherein the third capacity threshold is less than the fourth capacity threshold.
When the battery pack and the electricity utilization device are required to be charged at the same time in solar charging, the residual capacity of the current battery pack and the electricity utilization requirement of the electric equipment are required to be comprehensively considered, the residual capacity of the battery pack is smaller than a third capacity threshold, the endurance is influenced, and the battery pack is charged preferentially at the moment. When the remaining capacity of the battery pack is greater than the fourth capacity threshold, the remaining capacity of the battery pack is indicated not to affect the cruising duration, and the electric device can be charged with priority. When the remaining capacity of the battery pack is greater than or equal to the third capacity threshold and less than or equal to the fourth capacity threshold, the remaining capacity of the battery pack is not particularly sufficient although the endurance is not affected, and at this time, solar charging can be performed on the battery pack and the power utilization device at the same time, so that the solar charging efficiency is improved. Typically the third capacity threshold is 20% of the total battery pack capacity and the fourth capacity threshold is 40% of the total battery pack capacity.
It should be noted that, when the battery pack is sufficient and the photoelectric conversion efficiency of the solar energy is sufficient, the solar charging may also charge a 12V auxiliary battery in the vehicle, such as a lead-acid battery or a display screen battery.
It should be noted that, when the photovoltaic charging is finished, the charging may reach the battery capacity threshold, for example, 90% -95% of the total capacity, and the photovoltaic charging is finished, and meanwhile, an energy storage space is provided for energy feedback.
In a second aspect, as shown in fig. 10, the present application provides a new energy vehicle solar charging apparatus, comprising:
an acquisition unit for acquiring a remaining capacity of the battery pack, and
And the control unit is used for determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
The solar energy charging of the power battery pack and/or the power utilization device is determined through the relation between the photoelectric conversion efficiency of the solar photovoltaic panel and the residual capacity of the battery pack and the capacity threshold value, so that the solar energy charging can be carried out on the new energy vehicle when ground charging equipment is insufficient, the photoelectric conversion efficiency is sufficient and the battery power is insufficient, the vehicle is timely charged, and the charging pressure of the new energy vehicle is reduced.
The terms "comprising" and "having" and any variations thereof in the description and claims of the application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not limited to the list of steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, method, article, or device. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In describing embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiment of the present application, "/" means or, for example, a/B may mean a or B, and "and/or" in the text is merely an association relationship describing an association object, means that three relationships may exist, for example, a and/or B, three cases where a exists alone, a and B exist together, and B exists alone, and further, in the description of the embodiment of the present application, "a plurality" means two or more.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that the operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. The solar charging method for the new energy vehicle is characterized by comprising the following steps of:
Acquiring the photoelectric conversion efficiency of a solar photovoltaic panel;
If the photoelectric conversion efficiency of the solar photovoltaic panel is greater than or equal to the photoelectric conversion efficiency threshold value, the residual capacity of the battery pack is obtained;
determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value;
The solar charging of the power battery pack and/or the electricity utilization device is determined according to the relation between the remaining capacity of the battery pack and the capacity threshold, wherein the solar charging of the power battery pack and/or the electricity utilization device comprises the steps of preferentially charging the battery pack if the remaining capacity of the battery pack is smaller than a third capacity threshold, preferentially charging the electricity utilization device if the remaining capacity of the battery pack is larger than a fourth capacity threshold, and simultaneously charging the battery pack and the electricity utilization device if the remaining capacity of the battery pack is larger than or equal to the third capacity threshold and smaller than or equal to the fourth capacity threshold.
2. The method for charging a new energy vehicle according to claim 1, wherein the obtaining the photoelectric conversion efficiency of the solar photovoltaic panel comprises:
Acquiring illumination intensity and an included angle between the sunlight incidence direction and the photovoltaic panel;
and obtaining the photoelectric conversion efficiency of the solar photovoltaic panel according to the illumination intensity and the included angle between the sunlight incidence direction and the photovoltaic panel.
3. The method of claim 1, wherein determining solar charging of the power pack and/or the electricity device based on a relationship between a remaining capacity of the battery pack and a capacity threshold comprises:
acquiring current output by a solar panel and rated charging current of a battery pack;
If the ratio of the current output by the solar panel to the rated charging current of the battery pack is greater than a ratio threshold;
and determining to charge the power battery pack and/or the electric device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
4. The method of claim 1, wherein determining solar charging of the power pack and/or the electricity device based on a relationship between a remaining capacity of the battery pack and a capacity threshold comprises:
obtaining a bus voltage value and a photovoltaic boosting output voltage value of a battery pack;
and if the bus voltage value of the battery pack is smaller than the photovoltaic boosting output voltage value, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
5. The method for charging a new energy vehicle according to claim 4, wherein the step-up photovoltaic output voltage value and the bus voltage value of the battery pack are obtained by:
acquiring an output voltage of a solar photovoltaic panel and a photovoltaic boosting input voltage threshold;
And if the output voltage of the solar photovoltaic panel is greater than or equal to the photovoltaic boosting input voltage threshold value, acquiring a bus voltage value and a photovoltaic boosting output voltage value of the battery pack.
6. The method of claim 1, wherein determining solar charging of the power pack and/or the electricity device based on a relationship between a remaining capacity of the battery pack and a capacity threshold comprises:
Acquiring a discharge state of a battery pack;
If the battery pack is in a non-discharge state, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
7. The method of claim 1, wherein determining solar charging of the power pack and/or the electricity device based on a relationship between a remaining capacity of the battery pack and a capacity threshold comprises:
acquiring the charging state of a battery pack;
And if the battery pack is in a non-charging state, determining to charge the power battery pack and/or the power utilization device by solar energy according to the relation between the residual capacity of the battery pack and the capacity threshold value.
8. The method of claim 1, wherein determining solar charging of the power pack and/or the electricity device based on a relationship between a remaining capacity of the battery pack and a capacity threshold comprises:
If the residual capacity of the battery pack is smaller than the first capacity threshold, solar charging is carried out on the battery pack;
obtaining the residual capacity of a battery pack;
If the residual capacity of the battery pack is larger than the second capacity threshold value, stopping solar charging of the battery pack;
Wherein the second capacity threshold is greater than the first capacity threshold.
9. A new energy vehicle solar charging device, comprising:
The first acquisition unit acquires the photoelectric conversion efficiency of the solar photovoltaic panel;
a second acquisition unit for acquiring the residual capacity of the battery pack if the photoelectric conversion efficiency of the solar photovoltaic panel is greater than or equal to the photoelectric conversion efficiency threshold value, and
The control unit is used for determining solar charging of the power battery pack and/or the power utilization device according to the relation between the residual capacity of the battery pack and the capacity threshold value;
The solar charging of the power battery pack and/or the electricity utilization device is determined according to the relation between the remaining capacity of the battery pack and the capacity threshold, wherein the solar charging of the power battery pack and/or the electricity utilization device comprises the steps of preferentially charging the battery pack if the remaining capacity of the battery pack is smaller than a third capacity threshold, preferentially charging the electricity utilization device if the remaining capacity of the battery pack is larger than a fourth capacity threshold, and simultaneously charging the battery pack and the electricity utilization device if the remaining capacity of the battery pack is larger than or equal to the third capacity threshold and smaller than or equal to the fourth capacity threshold.
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| CN109941118A (en) * | 2019-04-12 | 2019-06-28 | 万帮之星新能源科技(上海)有限公司 | New-energy automobile power supply system |
| CN114940075A (en) * | 2021-02-16 | 2022-08-26 | 丰田自动车株式会社 | Vehicle-mounted solar charging control system, vehicle-mounted solar charging control method, and recording medium |
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| US9948136B2 (en) * | 2014-01-02 | 2018-04-17 | Enow, Inc. | Solar charging of multiple battery banks |
| CN108791139B (en) * | 2017-05-03 | 2022-01-11 | 上海汽车集团股份有限公司 | Automobile energy management system |
| CN114552670A (en) * | 2022-04-22 | 2022-05-27 | 沃太能源股份有限公司 | Control method of light storage firewood off-grid parallel operation system |
| CN116345627B (en) * | 2023-03-31 | 2025-08-15 | 上汽通用五菱汽车股份有限公司 | Vehicle-mounted solar charging method and related equipment |
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| CN109941118A (en) * | 2019-04-12 | 2019-06-28 | 万帮之星新能源科技(上海)有限公司 | New-energy automobile power supply system |
| CN114940075A (en) * | 2021-02-16 | 2022-08-26 | 丰田自动车株式会社 | Vehicle-mounted solar charging control system, vehicle-mounted solar charging control method, and recording medium |
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