CN115946561A - Charging method, charging device, storage medium and vehicle - Google Patents
Charging method, charging device, storage medium and vehicle Download PDFInfo
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- CN115946561A CN115946561A CN202310124723.1A CN202310124723A CN115946561A CN 115946561 A CN115946561 A CN 115946561A CN 202310124723 A CN202310124723 A CN 202310124723A CN 115946561 A CN115946561 A CN 115946561A
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- 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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The disclosure relates to a charging method, a charging device, a storage medium and a vehicle. The maximum output power of the charging pile is determined in the vehicle charging process, so that the maximum output power of the charging pile can be exerted to stably operate during boosting charging. The charging method comprises the following steps: determining an initial required power, wherein the initial required power is smaller than a vehicle battery end required power and smaller than the maximum boosting power of a boosting DCDC converter of the vehicle; on the basis of the initial required power, requesting to boost the charging output power of an external charging device connected with the vehicle through a preset boosting mode, and determining the maximum output power of the external charging device according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time; requesting the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputable power.
Description
Technical Field
The present disclosure relates to the field of electric vehicles, and in particular, to a charging method, a charging device, a storage medium, and a vehicle.
Background
Current electric automobile fills electric pile has different voltage platforms, in order to make electric automobile compatible and discern the electric pile that fills of different voltage platforms to and in order to improve the charging speed, electric automobile possesses the function of charging that steps up usually. For example, the voltage platform of 500V or 750V is boosted to 800V to charge the power battery.
In the related art, a constant current mode is generally adopted for boosting and charging of an electric vehicle, that is, a vehicle obtains the maximum charging current of a charging pile during message interaction, then requests the charging pile to output the maximum charging current at a constant current, and a boosting DCDC converter in a boosting module also works in the constant current mode to output a current request value of a battery end constantly. In addition, in the charging process, the boosting module, the power battery and the high-voltage accessories on the electric automobile are all loads of the charging pile, and along with the power change of the loads of the charging pile, the power of the boosting DCDC converter is required to be adjusted so as to ensure the voltage stability of the charging port.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a charging method, apparatus, storage medium, and vehicle.
According to a first aspect of the embodiments of the present disclosure, there is provided a charging method, including:
determining an initial required power, wherein the initial required power is smaller than a vehicle battery end required power and smaller than the maximum boosting power of a boosting DCDC converter of the vehicle;
on the basis of the initial required power, requesting to boost the charging output power of an external charging device connected with the vehicle through a preset boosting mode, and determining the maximum output power of the external charging device according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputtable power.
Optionally, on the basis of the initial required power, requesting to boost a charging output power of an external charging device connected to the vehicle by a preset boost mode, and determining a maximum outputtable power of the external charging device according to a voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time, where the method includes:
requesting to increase the initial required power according to the increasing mode to obtain a first output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the first output power and determining a first voltage of the charging port;
determining whether the first voltage is less than a preset voltage threshold;
determining the initial required power as the maximum outputtable power if it is determined that the first voltage is less than the voltage threshold.
Optionally, the method further comprises:
under the condition that the first voltage is determined to be larger than or equal to the voltage threshold, requesting to increase the first output power according to the increasing mode to obtain a second output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the second output power and determining a second voltage of the charging port;
determining whether the second voltage is less than the voltage threshold;
determining the second output power as the maximum outputtable power if it is determined that the second voltage is less than the voltage threshold.
Optionally, the determining the initial required power as the maximum outputtable power in the case that it is determined that the first voltage is less than the voltage threshold includes:
requesting the external charging device to charge the vehicle in a constant voltage mode according to the initial required power, and determining a third voltage of the charging port;
determining whether the third voltage is less than the voltage threshold;
determining the initial required power as a maximum outputtable power of the external charging device if it is determined that the third voltage is equal to or greater than the voltage threshold.
Optionally, the method further comprises:
requesting to reduce the initial required power in a preset reducing mode to obtain third output power under the condition that the third voltage is smaller than the voltage threshold;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the third output power and determining a fourth voltage of the charging port;
determining whether the fourth voltage is less than the voltage threshold;
determining the initial required power as the maximum outputtable power if it is determined that the fourth voltage is equal to or greater than the voltage threshold.
Optionally, the method further comprises:
determining whether a de-rating of a voltage of the charging port occurs;
under the condition that the voltage of the charging port is derated, adjusting the maximum output power to obtain the adjusted maximum output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the adjusted maximum outputtable power.
Optionally, the adjusting the maximum outputtable power to obtain the adjusted maximum outputtable power when the voltage of the charging port is derated includes:
determining a voltage difference when the voltage is de-rated;
calculating to obtain a derating coefficient according to the voltage difference and a preset voltage threshold;
and determining the product of the maximum outputtable power and the de-rating coefficient as the de-rated maximum outputtable power.
According to a second aspect of the embodiments of the present disclosure, there is provided a charging device including:
a first determination module configured to determine an initial required power, the initial required power being less than a vehicle battery-side required power and less than a maximum boost power of a boost DCDC converter of the vehicle;
a second determining module, configured to request to boost charging output power of an external charging device connected to the vehicle through a preset boosting mode on the basis of the initial required power, and determine maximum outputtable power of the external charging device according to a voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time;
a charging module configured to request the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputtable power.
According to a third aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the charging method provided by the first aspect of the present disclosure.
According to a fourth aspect of an embodiment of the present disclosure, there is provided a vehicle including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of the first aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: based on an initial required power which is smaller than the required power of a vehicle battery end and smaller than the maximum boosting power of a boosting DCDC converter of the vehicle, the charging output power of an external charging device connected with the vehicle is requested to be boosted through a preset boosting mode, the maximum output power of the external charging device is determined according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted every time, and the external charging device is requested to charge the vehicle in a constant voltage mode according to the maximum output power. Therefore, the maximum output power of the external charging device can be determined in the vehicle charging process, and the external charging device can be stably operated by the maximum output power of the external charging device during boosting charging. In addition, the external charging device works in a constant voltage mode, so that the stability of the voltage of the charging port is ensured, and for the boost DCDC converter, the charging current only needs to be output according to the request value of the vehicle battery end, the voltage of the charging port is kept stable without adjusting power, and the control logic of the boost DCDC converter is simplified.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is an architectural diagram illustrating an 800V platform electric vehicle according to an exemplary embodiment.
FIG. 2 is a schematic illustrating a boost charging energy flow according to an exemplary embodiment.
FIG. 3 is a simplified schematic diagram illustrating a boost charge, according to an exemplary embodiment.
Fig. 4 is a flow chart illustrating a charging method according to an example embodiment.
Fig. 5 is a flow chart illustrating a charging method according to another exemplary embodiment.
Fig. 6 is a block diagram illustrating a charging device according to an exemplary embodiment.
FIG. 7 is a block diagram of an electronic device shown in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The inventor finds that in the related art, the boosting charging generally adopts a constant current mode, namely, the vehicle obtains the maximum charging current of the charging pile during message interaction. For example, an electric vehicle of an 800V platform requests a constant current mode from a 500V/750V charging pile, with voltage as a protection value and current as a request value. The boost DCDC converter also operates in the constant current mode. Since the boost DCDC converter needs to have the capability of stabilizing the voltage of the charging port at a predetermined value during boosting, the input-side voltage of the boost DCDC converter is limited by the predetermined value of the voltage of the charging port in addition to the output-side voltage of the boost DCDC converter being limited by the voltage of the high-voltage battery during boosting charging. Therefore, in the charging process, the power of the load of the charging pile changes, wherein the power of the load of the charging pile includes the charging power of the battery, the power consumption power of the high-voltage accessory and the like.
Moreover, the maximum current, the maximum voltage and the nameplate information records of most of the charging piles are inconsistent at present, and the maximum output power of the charging pile cannot be directly obtained or calculated according to messages of interaction between the charging pile and a vehicle in the related technology. Therefore, by adopting the related technology, the maximum output power output by the charging pile can not be ensured to charge the vehicle, and the charging efficiency of the vehicle is influenced.
In view of this, the present disclosure provides a charging method, a charging apparatus, a storage medium, and a vehicle, so as to determine the maximum outputtable power of a charging pile in a vehicle charging process, and enable the charging pile to stably operate with the maximum outputtable power during boost charging.
It should be understood at first that the charging method provided by the present disclosure may be applied to a scenario in which a 500V/750V charging pile charges an 800V platform electric vehicle, and may also be applied to other boosting charging scenarios, which is not limited in the embodiment of the present disclosure. Taking an 800V platform electric vehicle as an example, as shown in fig. 1, the architecture of the 800V platform electric vehicle includes an 800V power battery (800 VBattery), a 400V/800V boost DCDC converter (400V/800 VDCDC), a Power Distribution Unit (PDU), a direct current charging port (DCPort), and other high voltage accessories (800 vhvaccensories) included in the electric vehicle. Other high-voltage accessories may include, among others, air conditioning systems, electric drive systems, on-board chargers OBC and boost DCDC converters, and the like.
Illustratively, as shown in FIG. 2, the dashed arrows represent 500V/750V energy flow, and the solid arrows represent 800V energy flow. The boost charging energy flow direction is: the 500V/750V charging pile is connected to the 800V electric automobile direct current charging port, switches K5 and K6 of a vehicle are disconnected, switches K1 and K2 of the charging pile are closed, the 500V/750V voltage output by the charging pile is boosted to the specified battery voltage through the 400V/800V boosting DCDC converter, and the 800V high-voltage battery and the high-voltage accessory are charged and/or powered. In this case, as shown in fig. 3, the charging pile is equivalent to a voltage source, and as long as the connected load power does not exceed the maximum output power of the charging pile, the charging pile can stably output the voltage requested by the vehicle, and the current is the ratio of the power of the load to the voltage of the charging pile. Therefore, when the charging pile is requested to charge the vehicle in the constant voltage mode, the request current is the maximum charging current of the charging pile in the interactive message, the request voltage is limited by the maximum output voltage of the charging pile and the boosting efficiency of the boosting DCDC converter, and the voltage difference of the input/output sides of the boosting DCDC converter is different, so that the boosting efficiency is different. On this basis, the request voltage can be selected according to the voltage difference corresponding to the optimal boosting efficiency and the battery voltage.
Fig. 4 is a flow chart illustrating a charging method according to an exemplary embodiment, as shown in fig. 4, the charging method including the steps of:
in step S101, an initial required power is determined, which is smaller than the vehicle battery-side required power and smaller than the maximum boost power of the boost DCDC converter of the vehicle.
In step S102, on the basis of the initial required power, a request is made to boost the charging output power of an external charging device connected to the vehicle in a preset boosting manner, and the maximum outputtable power of the external charging device is determined according to the voltage variation of the charging port of the vehicle after the charging output power of the external charging device is boosted each time.
In step S103, the external charging device is requested to charge the vehicle in the constant voltage mode according to the maximum outputtable power.
It should be understood that if the boost power of the boost DCDC converter exceeds the maximum output power of the external charging device, the external charging device in the constant voltage mode may cause a voltage drop due to an output overload. The higher the power exceeding the boost power of the boost DCDC converter, the higher the voltage dropped by the external charging device, and if the voltage is too low, the charging may fail. Therefore, the step-up power of the step-up DCDC converter at the time of charging the vehicle can be controlled to a small value at the start so as not to exceed the external charging device power.
The boost power of the boost DCDC converter is limited by three power values: (1) required power when the vehicle is charged; (2) boosting the maximum boost power of the DCDC converter; and (3) the maximum output power of the external charging device. When the external charging device charges the vehicle in the constant voltage mode, the external charging device is equivalent to a voltage source, the vehicle is equivalent to a load of the external charging device, and the current is the ratio of the power of the load to the voltage of the external charging device. Therefore, in the case where the required power and the maximum boost power of the boost DCDC converter are known when the vehicle is charged, it is possible to determine an approximate value of the true maximum output power of the external charging device by defining the output power of a smaller external charging device and performing power boosting based on the smaller output power, and request the external charging device to charge the vehicle in the constant voltage mode according to the approximate value.
Specifically, when the output power of the small external charging device is larger than the boost power of the boost DCDC converter and the power required by the battery terminal when the vehicle is charged, the boost DCDC converter charging power is not limited by the output power of the small external charging device, and the charging can be performed normally. In the case where both the boost power of the boost DCDC converter and the power required by the battery terminal when the vehicle is charged are larger than the output power of the small external charging device, the boost DCDC converter charging power is limited by the output power of the small external charging device, and in this case, although the external charging device does not drop in voltage and fail to be charged, the maximum charging capability of the external charging device cannot be exhibited, and at this time, the small output power can be increased to exhibit the true output power of the external charging device.
Therefore, the output power of the external charging device can be gradually increased according to a preset power increasing mode, the maximum output power of the external charging device is determined in the process, the maximum output power value is locked, and the external charging device is requested to charge the battery pack of the vehicle according to the maximum output power. The external charging device may be a charging pile or other power supply equipment that can supply power to the vehicle provided by the present disclosure, which is not limited in the embodiments of the present disclosure.
The preset power boosting mode can be determined according to parameters such as the charging performance of the external charging device, the minimum controllable boosting power of the boosting DCDC converter, the battery end required power when the vehicle is charged and the like. For example, a constant value may be determined so that the output power of the electric pile can be increased several times, and it should be noted that, in order to make the finally determined maximum outputtable power of the external charging device closer to the true maximum outputtable power of the external charging device, the constant value may be set to a smaller value such as 2KW or 3KW so that the charging port voltage does not drop too much after each power increase. Of course, the constant value may also be reduced in the event that the charging port voltage drops too much after the power boost is performed (e.g., the dropped voltage value is greater than the drop threshold). The constant value may be increased after a preset number of power boosts according to the constant value, without the charge port voltage falling yet. The power boosting method is not particularly limited in the embodiments of the present disclosure.
In addition, the power demand of the vehicle battery end can be the sum of the charging power of the vehicle battery and the power corresponding to other high-voltage accessories which need electricity and are included in the vehicle. The high-voltage accessories may include an air conditioning system, an electric drive system, an on-board charger OBC, a boost DCDC converter, and the like, which are not limited in this disclosure.
According to the technical scheme, based on the initial required power which is smaller than the required power of the battery end of the vehicle and smaller than the maximum boosting power of the boosting DCDC converter of the vehicle, the charging output power of the external charging device connected with the vehicle is requested to be boosted through the preset boosting mode, and the maximum outputtable power of the external charging device is determined according to the voltage change condition of the charging port of the vehicle after the charging output power of the external charging device is boosted every time, and the external charging device is requested to charge the vehicle in a constant voltage mode according to the maximum outputtable power. Therefore, the maximum output power of the external charging device can be determined in the vehicle charging process, and the stable operation of the maximum output power of the external charging device can be achieved in the boosting charging process. In addition, the external charging device works in a constant voltage mode, so that the stability of the voltage of the charging port is ensured, and for the boost DCDC converter, the charging current only needs to be output according to the request value of the vehicle battery end, the voltage of the charging port is kept stable without adjusting power, and the control logic of the boost DCDC converter is simplified.
By way of example, prior to determining the initial required power, further comprising:
the external charging device is requested to charge the vehicle in a constant voltage mode, and then the boost DCDC converter is requested to boost the voltage output from the external charging device in a constant current mode. When the external charging device charges the vehicle in the constant voltage mode, the voltage is a designated voltage, and the current is the maximum current of the external charging device. When the boost DCDC converter is requested to boost the voltage output by the external charging device in the constant current mode, the voltage is the maximum voltage of the vehicle battery end, and the current is the ratio of the minimum value of the required power when the vehicle is charged, the maximum boost power of the boost DCDC converter and the maximum output power of the external charging device to the current voltage of the vehicle battery end.
In a possible mode, on the basis of the initial required power, requesting to boost the charging output power of an external charging device connected with the vehicle through a preset boosting mode, and determining the maximum outputtable power of the external charging device according to the voltage change condition of a charging port of the vehicle after boosting the charging output power of the external charging device every time, wherein the method comprises the following steps of:
requesting to increase the initial required power according to the increasing mode to obtain a first output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the first output power and determining a first voltage of the charging port;
determining whether the first voltage is less than a preset voltage threshold;
in a case where it is determined that the first voltage is less than the voltage threshold, the initial required power is determined as the maximum outputtable power.
It should be understood that, since the external charging device operates in the constant voltage mode, when the power of the boost DCDC converter connected to the external charging device is greater than the maximum power of the external charging device, the output voltage of the external charging device may drop, and therefore, it may be determined whether the charging power of the boost DCDC converter is greater than the maximum outputtable power of the external charging device by determining whether the charging voltage of the charging port drops. That is, after the charging power of the external charging device is raised each time, the external charging device may be controlled to charge the power battery of the vehicle according to the raised charging power, and determine whether the charging voltage of the charging port falls, and if the charging voltage of the charging port falls, it indicates that the charging power of the boost DCDC converter is greater than the maximum outputtable power of the external charging device.
For example, the voltage threshold may be determined according to a boosting ratio of the boosted DCDC and a charge demand voltage at the vehicle battery side, and in the case where the first voltage is less than the voltage threshold, the initial demand power may be determined as the maximum outputable power.
It should also be understood that, the external charging device may be connected to a plurality of electric devices at the same time, that is, the external charging device may charge the power batteries of a plurality of vehicles at the same time, and therefore, in the process of charging the vehicle in the constant voltage mode by the external charging device according to the maximum outputable power, the external charging device may be disconnected from other vehicles, and stop charging the power batteries of other vehicles, which may increase the maximum outputable power of the external charging device, and at this time, the maximum outputable power of the external charging device charging the vehicle is smaller than the actual maximum outputable power of the external charging device.
Therefore, in order to improve the charging efficiency of the vehicle, in the process of determining the initial required power as the maximum outputable power and charging the vehicle in a constant voltage mode according to the maximum outputable power, the charging output power of the external charging device can be continuously increased for multiple times, and after each time of increasing, the voltage change condition of the charging port of the vehicle is verified based on the increased output power until the charging voltage of the charging port is smaller than the voltage threshold, which indicates that the maximum outputable power of the external charging device is increased, and at this moment, the maximum outputable power of the external charging device can be updated based on the increased output power.
For example, in the process of charging the vehicle in the constant voltage mode according to the initial required power, the first output power may be requested to be increased according to the increasing mode, the fourth output power is obtained, the external charging device is requested to charge the vehicle in the constant voltage mode according to the fourth output power, the fifth voltage of the charging port is determined, and then whether the fifth voltage is less than the preset voltage threshold is determined.
If the fifth voltage is less than the voltage threshold, it indicates that the maximum outputtable power of the external charging device is increased, and at this time, the fourth output power may be determined as the maximum outputtable power. If the fifth voltage is greater than or equal to the voltage threshold, it is determined that the maximum outputtable power of the external charging device is not increased, the fourth output power continues to be increased according to the increasing mode request until the voltage of the charging port corresponding to the increased output power is less than the voltage threshold, it is determined that the maximum outputtable power of the external charging device is increased, and at this time, the output power of the current increase after the previous increase can be determined as the maximum outputtable power.
In a possible manner, the charging method further comprises:
under the condition that the first voltage is determined to be larger than or equal to the voltage threshold, requesting to increase the first output power according to the increasing mode to obtain second output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the second output power and determining a second voltage of the charging port;
determining whether the second voltage is less than a voltage threshold;
and determining the second output power as the maximum outputtable power under the condition that the second voltage is determined to be smaller than the voltage threshold.
It should be understood that, in the process of increasing the output power of the external charging device according to the increasing manner, because it is uncertain how many times the power increase needs to be performed to increase the charging power of the boost DCDC converter to be greater than the maximum outputtable power of the external charging device, it is possible to determine whether the charging voltage of the charging port drops after each power increase, perform the power increase again under the condition that the charging voltage does not drop, and continue to determine whether the charging voltage of the charging port drops until the charging voltage of the charging port drops, and then do not perform the power increase.
Therefore, when the charging voltage of the charging port is judged not to drop, namely, when the first voltage is greater than or equal to the voltage threshold, the second output power can be increased according to the increasing mode to obtain the second output power, then the external charging device is requested to charge the vehicle in the constant voltage mode, the second voltage of the charging port is determined, whether the second voltage drops or not is judged, namely, whether the second voltage is smaller than the voltage threshold or not is determined, and when the second voltage is smaller than the voltage threshold, the second output power is determined as the maximum outputtable power.
In a possible manner, in a case where it is determined that the first voltage is less than the voltage threshold, determining the initial required power as the maximum outputable power includes:
requesting an external charging device to charge the vehicle in a constant voltage mode according to the initial required power, and determining a third voltage of a charging port;
determining whether the third voltage is less than a voltage threshold;
in a case where it is determined that the third voltage is equal to or greater than the voltage threshold, the initial required power is determined as the maximum outputtable power of the external charging device.
For example, in order to ensure the accuracy of the maximum outputtable power and further ensure that the external charging device exerts the maximum charging capability, the determined maximum outputtable power may be subjected to secondary verification. Therefore, the charging output power of the external charging device can be adjusted to be low, and verification can be performed based on the voltage change condition of the charging port of the vehicle after the output power is adjusted to be low.
Specifically, the charging output power of the external charging device may be adjusted to the initial required power, the external charging device may be requested to charge the vehicle in a constant voltage mode according to the initial required power, a third voltage of the charging port is determined, then it is determined whether the third voltage is smaller than a voltage threshold, if the third voltage is greater than or equal to the voltage threshold, it is described that the charging output power based on the external charging device is adjusted to be low, the charging voltage of the charging port rises, and it is further described that the initial required power determined this time is close to the true maximum outputtable power of the external charging device, and neither the external charging device nor the boost DCDC converter fails, and in this case, the initial required power may be determined as the maximum outputtable power of the external charging device.
In a possible manner, the charging method further includes:
under the condition that the third voltage is smaller than the voltage threshold value, requesting to reduce the initial required power through a preset reducing mode to obtain third output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the third output power, and determining a fourth voltage of the charging port;
determining whether the fourth voltage is less than a voltage threshold;
and determining the initial required power as the maximum outputtable power under the condition that the fourth voltage is determined to be greater than or equal to the voltage threshold.
For example, since the charging performance and/or the charging scenario of the external charging device are different, there may be a delay in the time when the charging voltage of the charging port rises back in the above-described secondary verification of the determined maximum outputable power. In order to ensure the charging efficiency of the vehicle, the charging output power of the external charging device can be reduced for multiple times, and after each time of reduction, the voltage change condition of the charging port of the vehicle is verified based on the reduced output power until the charging voltage of the charging port rises, and then the power is not reduced.
Therefore, when the third voltage is smaller than the voltage threshold, the initial required power can be requested to be reduced through a preset reducing mode to obtain third output power, then the external charging device is requested to charge the vehicle in a constant voltage mode according to the third output power, the fourth voltage of the charging port is determined, whether the fourth voltage is smaller than the voltage threshold is determined, if the fourth voltage is larger than or equal to the voltage threshold, the charging voltage of the charging port rises back, the initial required power determined at this time is close to the real maximum output power of the external charging device, and the external charging device and the boost DCDC converter do not have faults. The preset lowering mode can be consistent with the preset lifting mode, for example, the lifting mode is set to be a constant value of 2KW, and the lowering mode can be set to be a constant value of-2 KW.
It should be noted that the charging voltage of the charging port does not rise (i.e., the third voltage is smaller than the voltage threshold), and does not indicate that the initial required power cannot be determined as the maximum outputtable power, and only indicates that the charging voltage of the charging port rises. Therefore, when the charging voltage of the charging port is raised after the charging output power of the external charging device is adjusted down for a plurality of times, the initial required power is still determined as the maximum outputtable power. Of course, in order to avoid wasting unnecessary waiting time, a preset turn-down number may be set, and after the charging output power of the external charging device is turned down by the preset turn-down number, an abnormal prompt message may be sent when the charging voltage of the charging port is not yet raised, so that the driver may replace the external charging device for charging.
For example, the initial required power is 100KW, the first output power is 102KW, and the constant value of the lowering mode is-2 KW. When the charging output power of the external charging device is adjusted to be 100KW from 102KW, the charging voltage of the charging port is not increased, and the charging output power of the external charging device is continuously adjusted to be low according to the constant value-2 KW of the adjustment mode. If the charging voltage at the charging port rises back when the charging output power of the external charging device is adjusted to be 80KW, it still means that 100KW is close to the real maximum outputtable power of the external charging device, and neither the external charging device nor the boost DCDC converter fails, then 100KW is still determined as the maximum outputtable power of the external charging device.
In a possible manner, the charging method further includes:
determining whether the voltage of the charging port is derated;
under the condition that the voltage of the charging port is derated, adjusting the maximum output power to obtain the adjusted maximum output power;
and requesting the external charging device to charge the vehicle in a constant voltage mode according to the adjusted maximum outputtable power.
For example, during the process that the external charging device charges the vehicle in the constant voltage mode according to the maximum outputable power, the maximum outputable power of the external charging device may be reduced due to some uncertain factors (such as overheating of the external charging device, or charging of another vehicle by the external charging device while charging a plurality of vehicles), so that the voltage of the charging port may be pulled down, and further, the charging may fail.
Therefore, whether the voltage of the charging port is derated or not can be monitored in real time in the process that the external charging device charges the vehicle in the constant voltage mode according to the maximum outputable power, if the derating of the voltage of the charging port is monitored, the maximum outputable power of the external charging device is reduced, at the moment, the charging output power of the external charging device can be adjusted, and the external charging device is requested to charge the vehicle in the constant voltage mode according to the adjusted charging output power. The monitoring mode of the voltage of the charging port is not particularly limited in the embodiments of the present disclosure.
In a possible mode, when the voltage at the charging port is derated, the maximum output power is adjusted to obtain the adjusted maximum output power, and the method comprises the following steps:
determining a voltage difference when the voltage is de-rated;
calculating to obtain a derating coefficient according to the voltage difference and a preset voltage threshold;
and determining the product of the maximum outputable power and the de-rating coefficient as the de-rated maximum outputable power.
For example, when the voltage at the charging port is derated, the voltage difference when the voltage is derated may be determined, and then the derating coefficient may be calculated according to the voltage difference and a preset voltage threshold. Voltage difference when voltage derates = actual voltage of charging port/voltage threshold, derating coefficient = N × (1-voltage difference). N is a preset coefficient, where N may be determined according to charging performance of an external charging device, required power of a vehicle charging port, and boost performance of a boost DCDC converter, and may be set to a fixed value before charging, or may be adaptively adjusted according to a preset voltage threshold of a voltage difference when voltage derates during charging, which is not limited in the embodiment of the present disclosure.
Fig. 5 is a flow chart illustrating a charging method according to another exemplary embodiment, as shown in fig. 5, the charging method including the steps of:
in step S201, an initial required power, which is smaller than the vehicle battery-side required power and smaller than the maximum boost power of the boost DCDC converter of the vehicle, is determined.
In step S202, an initial required power is requested to be increased according to the increasing manner, so as to obtain a first output power.
In step S203, the external charging device is requested to charge the vehicle in the constant voltage mode according to the first output power, and a first voltage of the charging port is determined.
In step S204, it is determined whether the first voltage is less than a preset voltage threshold, if the first voltage is less than the voltage threshold, step S205 is executed, otherwise, the step S202 is returned to.
In step S205, the external charging device is requested to charge the vehicle in the constant voltage mode according to the initial required power, and the second voltage of the charging port is determined.
In step S206, it is determined whether the second voltage is less than a voltage threshold. If the second voltage is smaller than the voltage threshold, step S207 is executed, otherwise step S210 is executed.
In step S207, the initial required power is requested to be reduced through a preset reduction mode, so as to obtain a second output power.
In step S208, the external charging device is requested to charge the vehicle in the constant voltage mode according to the second output power, and a third voltage of the charging port is determined.
In step S209, it is determined whether the third voltage is less than the voltage threshold, and if the third voltage is less than the voltage threshold, the process returns to step S207, otherwise step S210 is executed.
Step S210, determining the initial required power as the maximum outputtable power.
And step S211 of requesting the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputtable power.
In step S212, it is determined whether the voltage of the charging port is derated. If the voltage of the charging port is derated, go to step S214, otherwise return to step S212.
In step S214, the voltage difference when the voltage is de-rated is determined.
Step S215, calculating to obtain a derating coefficient according to the voltage difference and a preset voltage threshold.
In step S216, the product of the maximum outputable power and the derating coefficient is determined as the derated maximum outputable power.
And step S217 of requesting the external charging device to charge the vehicle in the constant voltage mode according to the adjusted maximum outputable power.
According to the technical scheme, based on the initial required power which is smaller than the required power of the battery end of the vehicle and smaller than the maximum boosting power of the boosting DCDC converter of the vehicle, the charging output power of the external charging device connected with the vehicle is requested to be boosted through a preset boosting mode, the maximum output power of the external charging device is determined according to the voltage change condition of the charging port of the vehicle after the charging output power of the external charging device is boosted every time, and the external charging device is requested to charge the vehicle in a constant voltage mode according to the maximum output power. Therefore, the maximum output power of the external charging device can be determined in the vehicle charging process, and the external charging device can be stably operated by the maximum output power of the external charging device during boosting charging. In addition, the external charging device works in a constant voltage mode, so that the stability of the voltage of the charging port is ensured, and for the boost DCDC converter, the charging current only needs to be output according to the request value of the vehicle battery end, the voltage of the charging port is kept stable without adjusting power, and the control logic of the boost DCDC converter is simplified. Further, in the process that the external charging device charges the vehicle in a constant voltage mode according to the maximum outputable power, when the voltage of the charging port is monitored to be derated, the maximum outputable power can be adjusted according to the voltage difference and a preset voltage threshold, and charging failure caused by the fact that the voltage of the charging port is pulled down due to derating of the power of the external charging device is avoided.
Fig. 6 is a block diagram illustrating a charging device according to an exemplary embodiment. Referring to fig. 6, the charging apparatus 300 includes a first determining module 301, a second determining module 302, and a charging module 303.
A first determination module 301 configured to determine an initial required power, which is less than a vehicle battery-side required power and less than a maximum boost power of a boost DCDC converter of the vehicle;
a second determining module 302, configured to request to boost the charging output power of an external charging device connected to the vehicle through a preset boosting mode on the basis of the initial required power, and determine the maximum outputtable power of the external charging device according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time;
a charging module 303 configured to request the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputtable power.
Optionally, the second determining module 302 is configured to:
the first lifting module is configured to request to lift the initial required power according to the lifting mode to obtain first output power;
a third determination module configured to request the external charging device to charge the vehicle in a constant voltage mode according to the first output power and determine a first voltage of the charging port;
a fourth determination module configured to determine whether the first voltage is less than a preset voltage threshold;
a fifth determination module configured to determine the initial required power as the maximum outputtable power if it is determined that the first voltage is less than the voltage threshold.
Optionally, the charging device 300 further comprises:
the second boosting module is configured to request to boost the first output power according to the boosting mode to obtain a second output power under the condition that the first voltage is determined to be greater than or equal to the voltage threshold;
a sixth determination module configured to request the external charging device to charge the vehicle in a constant voltage mode according to the second output power and determine a second voltage of the charging port;
a seventh determination module configured to determine whether the second voltage is less than the voltage threshold;
an eighth determination module configured to determine the second output power as the maximum outputtable power if it is determined that the second voltage is less than the voltage threshold.
Optionally, the fifth determining module is configured to:
requesting the external charging device to charge the vehicle in a constant voltage mode according to the initial required power, and determining a third voltage of the charging port;
determining whether the third voltage is less than the voltage threshold;
determining the initial required power as a maximum outputtable power of the external charging device if it is determined that the third voltage is equal to or greater than the voltage threshold.
Optionally, the charging device 300 further comprises:
the reducing module is configured to request to reduce the initial required power in a preset reducing mode to obtain third output power under the condition that the third voltage is determined to be smaller than the voltage threshold;
a ninth determination module configured to request the external charging device to charge the vehicle in a constant voltage mode according to the third output power and determine a fourth voltage of the charging port;
a tenth determination module configured to determine whether the fourth voltage is less than the voltage threshold;
an eleventh determination module configured to determine the initial required power as the maximum outputtable power if it is determined that the fourth voltage is equal to or greater than the voltage threshold.
Optionally, the charging device 300 further comprises:
a twelfth determination module configured to determine whether a de-rating of the voltage of the charging port occurs;
the adjusting module is configured to adjust the maximum output power under the condition that the voltage of the charging port is derated to obtain the adjusted maximum output power;
a charging submodule configured to request the external charging device to charge the vehicle in a constant voltage mode according to the adjusted maximum outputtable power.
Optionally, the adjusting module is configured to:
determining a voltage difference when the voltage is de-rated;
calculating to obtain a derating coefficient according to the voltage difference and a preset voltage threshold;
and determining the product of the maximum outputtable power and the de-rating coefficient as the de-rated maximum outputtable power.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the charging method provided by the present disclosure.
The present disclosure also provides a vehicle comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the charging method provided by the present disclosure.
FIG. 7 is a block diagram illustrating an electronic device in accordance with an example embodiment. For example, the electronic device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 7, electronic device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output interface 812, a sensor component 814, and a communications component 816.
The processing component 802 generally controls overall operation of the electronic device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the charging method described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 806 provides power to the various components of the electronic device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 800.
The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the electronic device 800 is in an operation mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The input/output interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the electronic device 800. For example, the sensor assembly 814 may detect an open/closed state of the electronic device 800, the relative positioning of components, such as a display and keypad of the electronic device 800, the sensor assembly 814 may also detect a change in the position of the electronic device 800 or a component of the electronic device 800, the presence or absence of user contact with the electronic device 800, orientation or acceleration/deceleration of the electronic device 800, and a change in the temperature of the electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the electronic device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the charging method described above.
In an exemplary embodiment, a non-transitory computer readable storage medium including instructions, such as the memory 804 including instructions, executable by the processor 820 of the electronic device 800 to perform the charging method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
The apparatus may be a part of a stand-alone electronic device, for example, in an embodiment, the apparatus may be an Integrated Circuit (IC) or a chip, where the IC may be one IC or a collection of multiple ICs; the chip may include, but is not limited to, the following categories: a GPU (Graphics Processing Unit), a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an SOC (System on Chip, SOC, system on Chip, or System on Chip), and the like. The integrated circuit or chip may be configured to execute executable instructions (or code) to implement the charging method. Where the executable instructions may be stored in the integrated circuit or chip or may be retrieved from another device or apparatus, for example, where the integrated circuit or chip includes a processor, a memory, and an interface for communicating with other devices. The executable instructions may be stored in the memory, and when executed by the processor, implement the charging method described above; alternatively, the integrated circuit or chip may receive executable instructions through the interface and transmit the executable instructions to the processor for execution, so as to implement the charging method.
In another exemplary embodiment, a computer program product is also provided, which contains a computer program executable by a programmable apparatus, the computer program having code portions for performing the charging method described above when executed by the programmable apparatus.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A method of charging, comprising:
determining an initial required power, wherein the initial required power is smaller than a vehicle battery end required power and smaller than the maximum boosting power of a boosting DCDC converter of the vehicle;
on the basis of the initial required power, requesting to boost the charging output power of an external charging device connected with the vehicle through a preset boosting mode, and determining the maximum outputtable power of the external charging device according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputtable power.
2. The charging method according to claim 1, wherein the requesting, based on the initial required power, to boost the charging output power of an external charging device connected to the vehicle by a preset boosting mode, and determining the maximum outputtable power of the external charging device according to a voltage change condition of a charging port of the vehicle after each boosting of the charging output power of the external charging device comprises:
requesting to boost the initial required power according to the boosting mode to obtain first output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the first output power and determining a first voltage of the charging port;
determining whether the first voltage is less than a preset voltage threshold;
determining the initial required power as the maximum outputtable power if it is determined that the first voltage is less than the voltage threshold.
3. The charging method according to claim 2, further comprising:
under the condition that the first voltage is determined to be larger than or equal to the voltage threshold, requesting to increase the first output power according to the increasing mode to obtain a second output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the second output power and determining a second voltage of the charging port;
determining whether the second voltage is less than the voltage threshold;
determining the second output power as the maximum outputtable power if it is determined that the second voltage is less than the voltage threshold.
4. The charging method according to claim 2, wherein the determining the initial required power as the maximum outputtable power in the case where it is determined that the first voltage is less than the voltage threshold includes:
requesting the external charging device to charge the vehicle in a constant voltage mode according to the initial required power, and determining a third voltage of the charging port;
determining whether the third voltage is less than the voltage threshold;
determining the initial required power as a maximum outputtable power of the external charging device if it is determined that the third voltage is equal to or greater than the voltage threshold.
5. The charging method according to claim 4, further comprising:
requesting to reduce the initial required power in a preset reducing mode to obtain third output power under the condition that the third voltage is smaller than the voltage threshold;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the third output power and determining a fourth voltage of the charging port;
determining whether the fourth voltage is less than the voltage threshold;
determining the initial required power as the maximum outputable power if it is determined that the fourth voltage is greater than or equal to the voltage threshold.
6. The charging method according to claim 1, further comprising:
determining whether a derating of a voltage of the charging port occurs;
under the condition that the voltage of the charging port is derated, adjusting the maximum output power to obtain the adjusted maximum output power;
requesting the external charging device to charge the vehicle in a constant voltage mode according to the adjusted maximum outputable power.
7. The charging method according to claim 6, wherein the adjusting the maximum outputtable power when the voltage at the charging port is de-rated to obtain the adjusted maximum outputtable power comprises:
determining a voltage difference when the voltage is de-rated;
calculating to obtain a derating coefficient according to the voltage difference and a preset voltage threshold;
and determining the product of the maximum outputtable power and the de-rating coefficient as the de-rated maximum outputtable power.
8. A charging device, comprising:
a first determination module configured to determine an initial required power that is less than a vehicle battery-side required power and less than a maximum boost power of a boost DCDC converter of the vehicle;
a second determining module, configured to request to boost the charging output power of an external charging device connected to the vehicle through a preset boosting mode on the basis of the initial required power, and determine the maximum outputtable power of the external charging device according to the voltage change condition of a charging port of the vehicle after the charging output power of the external charging device is boosted each time;
a charging module configured to request the external charging device to charge the vehicle in a constant voltage mode according to the maximum outputable power.
9. A computer-readable storage medium, on which computer program instructions are stored, which program instructions, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 7.
10. A vehicle, characterized by comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any one of claims 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116169758A (en) * | 2023-04-25 | 2023-05-26 | 厦门英麦科芯集成科技有限公司 | Output power adjusting method and charger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116169758A (en) * | 2023-04-25 | 2023-05-26 | 厦门英麦科芯集成科技有限公司 | Output power adjusting method and charger |
| CN116169758B (en) * | 2023-04-25 | 2024-05-03 | 厦门英麦科芯集成科技有限公司 | Output power adjusting method and charger |
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