Vehicle charging control method and device, vehicle and storage medium

Abstract

The invention relates to a vehicle charging control method and device, a vehicle and a storage medium, and relates to the technical field of vehicle charging, and the method comprises the steps that the vehicle charging state is determined; in response to the vehicle charging state being a first state, detecting an output current of the charging equipment in a corresponding charging period, determining a maximum output power of the charging equipment, a first power required by a rechargeable battery of the vehicle and a second power required by a charging load of the vehicle, and determining a target current required to be output by the charging equipment; in response to the fact that the vehicle charging state is a second state, target current requesting to be output by the charging equipment is determined with the fact that the average value of input current of the rechargeable battery in the target charging period is smaller than zero as a control target; when the vehicle charging state is a first state, the charging device charges the rechargeable battery. According to the method and the device, the target current can be determined according to different control strategies based on different charging states, so that packet entering current ripples are inhibited, and the vehicle performance and reliability during vehicle charging are ensured.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle charging technology, and in particular to a vehicle charging control method, device, vehicle and storage medium. Background Art

[0002] When charging new energy vehicles, the high-voltage system inside the vehicle is composed of power batteries and high-voltage components. Since the high-voltage components and high-voltage batteries are coupled together through the high-voltage bus to form an independent DC microgrid, if current ripple is generated, it will directly act on the power battery on the same DC bus. The current ripple in the current entering the battery may cause the battery temperature to rise and the reaction rate inside the battery to increase, thereby shortening the battery life, and may also cause instability in the control system and cause some vehicle functions to fail.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a vehicle charging control method, device, equipment and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a vehicle charging control method, comprising:

[0006] Determine vehicle charging status;

[0007] In response to the vehicle charging state being a first state, detecting an output current of a charging device in a corresponding charging cycle, and determining a maximum output power of the charging device, a first power required by a charging battery of the vehicle, and a second power required by a charging load of the vehicle;

[0008] Determine a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power;

[0009] In response to the vehicle charging state being the second state, taking the average value of the input current of the charging battery in a target charging cycle being less than zero as a control target, determining a target current to be output by the charging device;

[0010] The vehicle charging state is the first state, and the charging device charges the rechargeable battery.

[0011] In some embodiments of the present disclosure, determining a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power includes:

[0012] Based on the output current, determining a current ripple state of the output current;

[0013] The target current is determined based on the current ripple state, the maximum output power, the first power, and the second power.

[0014] In some embodiments of the present disclosure, determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power includes:

[0015] In response to the current ripple state being a first target state, determining a charging bus voltage;

[0016] Calculate and determine a first demand current based on the charging bus voltage, the first power, and the second power;

[0017] Calculating and determining a first maximum output current based on the maximum output power and the charging bus voltage;

[0018] The target current is determined by comparing the numerical values ​​of the first demand current and the first maximum output current.

[0019] In some embodiments of the present disclosure, determining the target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power further includes:

[0020] Determine a preset charging output current;

[0021] The step of comparing the first demand current and the first maximum output current to determine the target current includes:

[0022] The target current is determined by comparing the numerical values ​​of the preset charging output current, the first required current and the first maximum output current.

[0023] In some embodiments of the present disclosure, determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power includes:

[0024] In response to the current ripple state being a second target state, determining a charging bus voltage;

[0025] Calculating and determining a second maximum output current based on the maximum output power and the charging bus voltage;

[0026] Calculating and determining a second required current based on the second power and the charging bus voltage;

[0027] Determining the maximum allowable charging current of the rechargeable battery;

[0028] The target current is determined by calculation based on the second required current, the second maximum output current, and the maximum allowable charging current.

[0029] In some embodiments of the present disclosure, determining the target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power further includes:

[0030] Determine a preset charging output current;

[0031] The step of calculating and determining the target current based on the second required current, the second maximum output current, and the maximum allowable charging current includes:

[0032] The target current is calculated and determined based on the preset charging output current, the second required current, the second maximum output current, and the maximum allowable charging current.

[0033] In some embodiments of the present disclosure, calculating and determining the target current based on the second required current, the second maximum output current, and the maximum allowable charging current includes:

[0034] Taking the peak value of the input current of the rechargeable battery as lower than the maximum allowable charging current, based on the second demand current, the range of the average value of the target current is calculated and determined; wherein the peak value of the input current of the rechargeable battery is positively correlated with the average value of the target current; and the peak value of the input current of the rechargeable battery is negatively correlated with the second demand current;

[0035] The target current is determined based on the range of the average value and the second maximum output current.

[0036] In some embodiments of the present disclosure, the charging load includes a positive temperature coefficient resistor.

[0037] In some embodiments of the present disclosure, taking the average value of the input current of the rechargeable battery within the target charging cycle as less than zero as a control target, determining the target current requested to be output by the charging device includes:

[0038] Determining a pulse operating current of a positive temperature coefficient resistor; wherein the charging load includes the positive temperature coefficient resistor;

[0039] Taking the cumulative charging amount of the rechargeable battery within the target charging cycle as less than zero as a target, the target current is calculated and determined based on the pulse working current;

[0040] The accumulated charging capacity is positively correlated with the target current, and the accumulated charging capacity is negatively correlated with the average value of the pulse working current.

[0041] In some embodiments of the present disclosure, taking the average value of the input current of the rechargeable battery within the target charging cycle as less than zero as the control target, determining the target current requested to be output by the charging device further includes:

[0042] Determine the charging mode type corresponding to the charging device;

[0043] Based on the charging mode type, determining an upper threshold value of the target current;

[0044] Based on the upper threshold value, the determined target current is verified.

[0045] In some embodiments of the present disclosure, taking the average value of the input current of the rechargeable battery within the target charging cycle as less than zero as the control target, determining the target current requested to be output by the charging device further includes:

[0046] Determining the input current peak value of the rechargeable battery based on the determined target current and the pulse operating current of the positive temperature coefficient resistor;

[0047] Determining the maximum allowable charging current of the rechargeable battery;

[0048] Check whether the peak value of the input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery.

[0049] According to a second aspect of an embodiment of the present disclosure, there is provided a vehicle charging control device, including:

[0050] a state determination unit, for determining a vehicle charging state;

[0051] a first determining unit, configured to detect an output current of a charging device in a corresponding charging cycle in response to the charging state of the vehicle being a first state, determine a maximum output power of the charging device, a first power required by a charging battery of the vehicle, and a second power required by a charging load of the vehicle; and determine a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power;

[0052] a second determining unit, configured to determine, in response to the vehicle charging state being in the second state, a target current to be output by the charging device with the input current of the charging battery being less than zero as a control target;

[0053] The vehicle charging state is the first state, and the charging device charges the rechargeable battery.

[0054] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising:

[0055] processor;

[0056] a memory for storing processor-executable instructions;

[0057] Wherein, the processor is configured to: implement the steps of any one of the vehicle charging control methods described in the first aspect above.

[0058] According to a fourth aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of a vehicle, the vehicle is enabled to execute any one of the vehicle charging control methods described in the first aspect above.

[0059] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0060] The present disclosure determines the charging state of the vehicle; in response to the vehicle charging state being the first state, detects the output current of the charging device in the corresponding charging cycle, determines the maximum output power of the charging device, the first power required by the vehicle's charging battery, and the second power required by the vehicle's charging load; when the vehicle charging state is the first state, the charging device charges the charging battery; based on the output current, the maximum output power, the first power, and the second power, determines the target current requested to be output by the charging device; in response to the vehicle charging state being the second state, takes the average value of the input current of the charging battery in the target charging cycle as the control target to determine the target current requested to be output by the charging device. By determining the charging state of the vehicle, based on different charging states, and according to different control strategies, the target current requested to be output by the charging device is determined, thereby ensuring that the current ripple of the input current of the charging battery is suppressed under different charging states, so as to ensure the vehicle performance and reliability when the vehicle is charged.

[0061] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] 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 present disclosure.

[0063] Figure 1 The figure is a flow chart of a vehicle charging control method according to an exemplary embodiment of the present disclosure.

[0064] Figure 2 is a flowchart of the implementation process of step S106 according to an exemplary embodiment of the present disclosure.

[0065] Figure 3 The implementation process flow of step S204 according to an exemplary embodiment of the present disclosure is as follows: Figure 1 .

[0066] Figure 4 The implementation process flow of step S204 according to an exemplary embodiment of the present disclosure is as follows: Figure 2 .

[0067] Figure 5 The implementation process flow of step S204 according to an exemplary embodiment of the present disclosure is as follows: Figure 3 .

[0068] Figure 6 is a flowchart of the implementation process of step S510 according to an exemplary embodiment of the present disclosure.

[0069] Figure 7 The following is a flow chart of an implementation process of step S204 according to an exemplary embodiment of the present disclosure. Figure 4 .

[0070] Figure 8 The following is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 1 .

[0071] Fig. 9 The following is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 2 .

[0072] Fig.10 The following is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 3 .

[0073] Fig.11 It is a schematic diagram of current flow corresponding to a vehicle charging state of a second state according to an exemplary embodiment of the present disclosure.

[0074] Fig.12 It is a schematic diagram of the waveforms of the PTC pulse working current and the input current of the rechargeable battery in a specific embodiment according to an exemplary embodiment of the present disclosure.

[0075] Fig.13 It is a schematic diagram of a simple connection relationship between a charging device, a PTC and a rechargeable battery in a related technology in a specific example of an exemplary embodiment of the present disclosure.

[0076] Fig.14 1 is a schematic diagram of the waveform of the input current of the rechargeable battery of the control group and the experimental group in a specific example of an exemplary embodiment of the present disclosure.

[0077] Fig.15It is a schematic diagram of the current waveform of the charging battery entering the battery pack when the vehicle charging state is in the second state in a specific example of an exemplary embodiment of the present disclosure.

[0078] Fig.16 The present invention is a block diagram of a vehicle charging control device according to an exemplary embodiment of the present invention.

[0079] Fig.17 It is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0080] Here, some exemplary embodiments of the present disclosure will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the methods, devices and / or systems described herein will become apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those orders set forth herein, but can be changed as becomes apparent after understanding the present disclosure, except for operations that must be performed in a specific order. In addition, for the purpose of improving clarity and brevity, descriptions of features known in the art may be omitted.

[0081] The following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0082] The specific implementation of the embodiment of the present disclosure is described in detail below with reference to the accompanying drawings.

[0083] In related technologies, in order to prevent the vehicle's power battery from being disturbed by current ripple, under different working conditions, the main relay between the power battery and the charging device is disconnected or turned off to control whether the power battery is connected to the charging circuit bus. However, since the working conditions may switch frequently, it means that the main relay needs to be turned on and off, which will shorten the service life of the device and change the charging circuit topology, causing certain performance failures of the vehicle and even safety hazards.

[0084] Figure 1 is a flow chart of a vehicle charging control method according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the vehicle charging control method can be used for a vehicle, which can be a new energy vehicle, and a rechargeable battery included in the vehicle can be charged by a charging device, including the following steps.

[0085] In step S102 , the vehicle charging state is determined.

[0086] In an exemplary implementation of the present disclosure, in response to charging the vehicle using a charging device, the vehicle charging state is determined. It should be noted that the charging device can be a charging device that uses direct current, such as a DC FastCharger, a portable charger, etc., or a charging device that uses alternating current, which converts the alternating current into direct current and supplies it to a rechargeable battery in the vehicle, such as an on-board charger, an AC Charging Station, etc. A rechargeable battery is a battery used to store electrical energy and provide power to the vehicle, and can also be called a power battery or a high-voltage battery.

[0087] It should be noted that when the charging device is used to charge the vehicle, the charging device is electrically connected to the vehicle, but the charging device does not always charge the rechargeable battery. It can be divided into at least a first state and a second state. When the vehicle charging state is the first state, the charging device charges the rechargeable battery, that is, the rechargeable battery is allowed to be charged. At this time, the load on the high-voltage side of the vehicle and the rechargeable battery are both powered by the charging device. When the vehicle charging state is the second state, the vehicle can be in an energy replenishment state or a pilot heating state. In this state, the charging device supplies power to the load on the high-voltage side of the vehicle.

[0088] In step S104, in response to the vehicle charging state being the first state, the output current of the charging device in the corresponding charging cycle is detected to determine the maximum output power of the charging device, the first power required by the vehicle's charging battery, and the second power required by the vehicle's charging load.

[0089] It should be noted that the charging device outputs a periodic output current to power the rechargeable battery and the charging load. The charging load refers to the various electrical systems and components in the vehicle that are powered by the rechargeable battery, which may include: electric motors, DC / DC converters (converting high-voltage direct current into low-voltage direct current for powering low-voltage systems in the vehicle, including lighting, audio, air conditioning and other auxiliary equipment), thermal management systems, power electronic controllers, PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), etc. When the vehicle is running, the charging load is powered by the rechargeable battery, and when the charging device is used to charge the vehicle, the charging device can be used to power it.

[0090] In an exemplary embodiment of the present disclosure, the corresponding charging cycle may be the last complete charging cycle closest to the current control moment. For example, if the charging cycle duration is 0.5s and the charging start time is marked as 0, then when the charging duration corresponding to the current control moment is 1.1s, the corresponding charging cycle is the second charging cycle. Detecting the output current of the charging device in the corresponding charging cycle means detecting the instantaneous value of the output current of the charging device in the corresponding charging cycle, or detecting the waveform of the output current of the charging device in the corresponding charging cycle.

[0091] In an exemplary embodiment of the present disclosure, the maximum output power of a charging device refers to the highest power transmission rate that the charging device can provide within a safe operating range. For example, the maximum output power of a fast DC charging pile can be 50kW, 150kW, or 600kW. The first power required by a vehicle's charging battery refers to the power required when the charging battery is charged, which is related to factors such as battery capacity, desired charging time requirements, charging efficiency, and type of charging equipment, and can be determined by the vehicle management system according to actual operating conditions. The second power required by a vehicle's charging load refers to the power required when the charging load is powered, which is related to the operating conditions of the charging load, and can be determined by the vehicle management system according to actual operating conditions.

[0092] In step S106 , a target current that the charging device is requested to output is determined based on the output current, the maximum output power, the first power, and the second power.

[0093] In some exemplary embodiments of the present disclosure, when the vehicle charging state is the first state, the target current requested to be output by the charging device can be determined based on the output current of the charging device in the corresponding charging cycle, the maximum output power of the charging device, the first power required by the charging battery of the vehicle, and the second power required by the charging load of the vehicle. It should be noted that the target current requested to be output by the charging device is the current that the vehicle requests the charging device to output to the vehicle.

[0094] In step S108 , in response to the vehicle charging state being the second state, the target current to be output by the charging device is determined with the average value of the input current of the charging battery within the target charging cycle being less than zero as a control target.

[0095] It should be noted that when the vehicle's charging state is the second state, the vehicle can be in a recharging state or in a pilot heating state. The vehicle is in a pilot heating state when the temperature of the rechargeable battery cell is too low, for example, below minus twenty degrees Celsius, and the vehicle's heating function is activated to meet the heating needs of the battery and the interior of the vehicle to improve the vehicle's performance in low temperature environments. The vehicle is in a recharging state when it is waiting for charging, charging is stopped, and charging is completed but the connection with the charging device is not disconnected. In this state, the charging load still has power requirements. For example, when the vehicle is still plugged in the charging gun, the vehicle continues to provide functions such as air conditioning and battery heating. In order to ensure that the rechargeable battery does not lose power, a charging pile is used to supply energy to the charging load.

[0096] In some exemplary embodiments of the present disclosure, the target charging cycle may be every charging cycle when the vehicle charging state is in the second state.

[0097] It can be seen from the above steps that the vehicle charging control method provided in the embodiment of the present disclosure determines the vehicle charging state; in response to the vehicle charging state being the first state, detects the output current of the charging device in the corresponding charging cycle, determines the maximum output power of the charging device, the first power required by the vehicle's charging battery, and the second power required by the vehicle's charging load; the vehicle charging state is the first state, and the charging device charges the charging battery; based on the output current, the maximum output power, the first power, and the second power, determines the target current requested to be output by the charging device; in response to the vehicle charging state being the second state, takes the average value of the input current of the charging battery in the target charging cycle as the control target to determine the target current requested to be output by the charging device. By determining the vehicle charging state, based on different charging states, and according to different control strategies, the target current requested to be output by the charging device is determined, thereby ensuring that the current ripple of the input current of the charging battery is suppressed under different charging states, so as to ensure the vehicle performance and reliability when the vehicle is charged.

[0098] It should be noted that in some embodiments of the present disclosure, the implementation process of step S106 is as follows: Figure 2 As shown, a flowchart for illustrating an implementation process of determining a target current requested to be output by a charging device includes the following steps.

[0099] In step S202 , based on the output current, a current ripple state of the output current is determined.

[0100] In step S204, a target current is determined based on the current ripple state, the maximum output power, the first power, and the second power.

[0101] It should be noted that in some optional embodiments of the present disclosure, the current ripple state can be determined based on the difference between the maximum and minimum values ​​of the output current in the corresponding charging cycle. It is understandable that the current output by the charging device in an ideal state is direct current, but due to the existence of ripple current, the output current may not be a constant direct current, so the output current at this time has current value fluctuations. By determining the maximum and minimum values ​​of the current value, the current ripple state can be determined by making a difference.

[0102] In some embodiments of the present disclosure, comparing the above difference with a preset current difference threshold to determine the current ripple state may include: when the above difference is less than or equal to the current difference threshold, the current ripple state is a first target state, indicating that the output current does not have current ripple or the current ripple is small and can be ignored; when the above difference is greater than the current difference threshold, the current ripple state is a second target state, indicating that the output current has a large current ripple. Accordingly, the control strategies corresponding to the two states may also be different to adapt to different working conditions.

[0103] In some exemplary embodiments of the present disclosure, an implementation process flow of step S204 is Figure 1 like Figure 3 As shown, the following steps are included.

[0104] In step S302 , in response to the current ripple state being the first target state, the charging bus voltage is determined.

[0105] It should be noted that the charging bus voltage can be determined by detecting the voltage at the DC bus used for charging.

[0106] In step S304 , a first demand current is calculated and determined based on the charging bus voltage, the first power, and the second power.

[0107] It should be noted that the sum of the first power required by the vehicle's charging battery and the second power required by the vehicle's charging load is the sum of the energy required by the charging device. Combined with the charging bus voltage, the first required current of the energy required by the charging device can be calculated. In other words, the first required current is obtained by adding the first power to the second power and dividing it by the charging bus voltage.

[0108] In step S306 , a first maximum output current is calculated and determined based on the maximum output power and the charging bus voltage.

[0109] It should be noted that the first maximum output current can be obtained by dividing the maximum output power by the charging bus voltage, that is, the maximum current that the charging device can output in this case.

[0110] In step S308, the first demand current and the first maximum output current are compared to determine the target current.

[0111] It should be noted that, by comparing the numerical values ​​of the first demand current and the first maximum output current, the smaller value is used as the target current. Specifically, if the first demand current is greater than the first maximum output current, it indicates that the power supply capacity of the charging device is limited, and the charging device cannot supply power according to the current expected by the rechargeable battery and the charging load, so the target current requested to be output by the charging device is the first maximum output current. If the first demand current is less than the first maximum output current, it indicates that the power supply capacity of the charging device is sufficient and the demand is lower, and the charging device can supply power according to the current expected by the rechargeable battery and the charging load, so the target current requested to be output by the charging device is the first demand current.

[0112] In some exemplary embodiments of the present disclosure, an implementation process flow of step S204 is Figure 2 like Figure 4 As shown, Figure 4 Steps S402 to S406 are Figure 3 The steps S302 to S306 in the above method correspond to each other and are not repeated here. The following steps are also included.

[0113] In step S408 , a preset charging output current is determined.

[0114] It should be noted that the preset charging output current is the charging output current set by the user. In some embodiments of the present disclosure, in order to avoid overload, user personalized needs, economical charging or fast charging needs, etc., the vehicle and its supporting applications may provide a relevant interface for users to set charging options to set the charging output current to limit the maximum charging current that the user can accept.

[0115] In step S410, the preset charging output current, the first required current and the first maximum output current are compared to determine the target current.

[0116] In some exemplary embodiments of the present disclosure, the numerical values ​​of the preset charging output current, the first demand current and the first maximum output current are compared, and the smallest value is used as the target current. The preset charging output current represents the maximum value of the current set by the user to be output by the desired charging device. By comparing with the first demand current and the first maximum output current, the smallest value is selected as the target current requested to be output by the charging device to meet the user's needs.

[0117] In some exemplary embodiments of the present disclosure, an implementation process flow of step S204 is Figure 3 like Figure 5 As shown, the following steps are included.

[0118] In step S502 , in response to the current ripple state being the second target state, the charging bus voltage is determined.

[0119] It should be noted that when the current ripple state is the second target state, it indicates that there is a large current ripple in the output current of the charging device, and the charging bus voltage can be determined by detecting the voltage at the DC bus used for charging.

[0120] In step S504, a second maximum output current is calculated and determined based on the maximum output power and the charging bus voltage.

[0121] It should be noted that the maximum output power can be divided by the charging bus voltage to obtain the second maximum output current, that is, the maximum current that the charging device can output in this case.

[0122] In step S506 , a second required current is calculated and determined based on the second power and the charging bus voltage.

[0123] It should be noted that the second required current is obtained by dividing the second power by the charging bus voltage, that is, the current that the charging load expects to be supplied by the charging device.

[0124] In step S508, the maximum allowable charging current of the rechargeable battery is determined.

[0125] It should be noted that the maximum allowable charging current of the rechargeable battery is determined by the characteristics of the rechargeable battery, for example, it is related to the current temperature and the battery state of charge (SoC). The maximum allowable charging current corresponding to the current temperature and battery state of charge can be found based on the preset charging strategy table corresponding to the rechargeable battery.

[0126] In step S510 , a target current is calculated based on the second required current, the second maximum output current, and the maximum allowable charging current.

[0127] In some exemplary embodiments of the present disclosure, the implementation process of step S510 is as follows: Figure 6 As shown, the following steps are included.

[0128] In step S602 , the peak value of the input current of the charging battery is set to be lower than the maximum allowable charging current, and the range of the average value of the target current is calculated and determined based on the second required current.

[0129] It should be noted that the peak value of the input current of the rechargeable battery is positively correlated with the average value of the target current; the peak value of the input current of the rechargeable battery is negatively correlated with the second demand current. The target current not only needs to provide the input current of the rechargeable battery but also needs to provide the second demand current, that is, the target current minus the second demand current is the input current of the rechargeable battery. The peak value of the input current of the rechargeable battery is equal to the peak value of the target current minus the second demand current. Taking into account the worst working conditions, the waveform of the target current fluctuates back and forth between 0 and the peak value, so the average value of the target current is half of the peak value of the target current.

[0130] It should be noted that the peak value of the input current of the rechargeable battery must be lower than the maximum allowable charging current to ensure normal charging of the rechargeable battery. That is to say, the value of twice the average value of the target current minus the second required current is less than or equal to the maximum allowable charging current. The second required current and the maximum allowable charging current are known quantities, and the range of the average value of the target current can be determined.

[0131] In step S604 , a target current is determined based on the range of the average value and the second maximum output current.

[0132] It should be noted that the average value of the target current must be less than or equal to the second maximum output current. Combined with the range of the average value, the first final range of the average value of the target current can be determined. In specific implementation, the average value of the target current can be determined by taking a value in the first final range based on the working condition requirements, such as taking the maximum value in the first final range. The peak value of the target current is twice the average value, so that the waveform of the target current can be determined to control the vehicle to request the charging device to output the corresponding target current.

[0133] In some exemplary embodiments of the present disclosure, an implementation process flow of step S204 is Figure 4 like Figure 7 As shown, Figure 4 Steps S702 to S708 are Figure 5 The steps S502 to S508 in the above method correspond to each other and are not repeated here. The following steps are also included.

[0134] In step S710 , a preset charging output current is determined.

[0135] It should be noted that the preset charging output current is the charging output current set by the user. In some embodiments of the present disclosure, in order to avoid overload, user personalized needs, economical charging or fast charging needs, etc., the vehicle and its supporting applications may provide a relevant interface for users to set charging options to set the charging output current to limit the maximum charging current that the user can accept.

[0136] In step S712, a target current is calculated and determined based on a preset charging output current, a second required current, a second maximum output current, and a maximum allowable charging current.

[0137] In an exemplary embodiment of the present disclosure, the implementation process of step S712 includes: implementing the range of the average value obtained in accordance with step S602, and determining the target current based on the range of the average value, the preset charging output current, and the second maximum output current. The average value of the target current must also be less than or equal to the second maximum output current and must also be less than or equal to the preset charging output current. In combination with the range of the average value, the second final range of the average value of the target current can be determined. In specific implementation, the average value of the target current can be determined by taking a value in the second final range based on the operating condition requirements, such as taking the maximum value in the second final range. The peak value of the target current is twice the average value, so that the waveform of the target current can be determined to control the vehicle to request the charging device to output the corresponding target current.

[0138] For example, let the target current be I0 and the average value of the target current be I 0avg , the second demand current is recorded as I 2d , the preset charging output current is recorded as I set , the second maximum output current is recorded as I 2outmax , the maximum allowable charging current is recorded as I map Then 2×I 0avg -I 2d ≤I map , and I 0avg ≤I set And I 0avg ≤I 2outmax . Solve I according to the above three inequalities 0avg The value range of I 0avg =min{I set ,I 2outmax ,1 / 2(I map +I 2d )}.

[0139] In an exemplary embodiment of the present disclosure, in response to the current ripple state being the second target state, and the charging load including a positive temperature coefficient resistor PTC, that is, the vehicle is in a charging state but the vehicle turns on the heating function. Since PTC is a pulse current rather than a constant DC current, when calculating the second demand current, the sum of the powers of other charging loads except PTC, P1, can be determined, and the first load current is obtained by dividing P1 by the charging bus voltage. Combined with the pulse current waveform of PTC, the effective value of the pulse current of PTC is calculated as the second load current, and the first load current and the second load current are added to obtain the second demand current.

[0140] The present disclosure distinguishes different working conditions by determining the current ripple state of the output current of the charging device in the corresponding charging cycle when the vehicle charging state is the first state. When the current ripple state is the first target state, two or three limiting conditions of the target current are determined, and the one with the smallest value is selected to meet the limitation of the target current. When the current ripple state is the second target state, it is analyzed whether PTC is put into use. When PTC is put into use, the second demand current is calculated by the effective value of the pulse current of PTC, and the target current is controlled by combining the second demand current and the maximum allowable charging current of the rechargeable battery, so that the input current peak of the rechargeable battery is lower than the maximum allowable charging current, so as to ensure the charging safety of the rechargeable battery. By dividing the various working conditions that may occur when the vehicle charging state is the first state, and proposing a corresponding control strategy for each working condition, the corresponding target current requested to be output by the charging device is obtained, so as to ensure that the voltage ripple in the high-voltage system of the vehicle is small when the vehicle charging state is the first state, and reduce the impact on the life of high-voltage components and small batteries.

[0141] like Figure 8 FIG. 1 is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 1 , comprising the following steps.

[0142] In step S802, the pulse operating current of the positive temperature coefficient resistor is determined.

[0143] It should be noted that, in response to the vehicle charging state being the second state, the charging load includes a positive temperature coefficient resistor PTC. The working characteristics of the PTC make its working current present a pulse form, that is, the pulse working current of the PTC can be determined, the pulse working current has a peak value, and the minimum value of the pulse working current is 0.

[0144] In step S804, the target current is calculated and determined based on the pulse working current, with the goal of the cumulative charging amount of the rechargeable battery within the target charging cycle being less than zero.

[0145] It should be noted that when the vehicle charging state is the second state, the rechargeable battery is not allowed to be charged, but the rechargeable battery is still connected to the charging bus. In order to ensure the safe use of the rechargeable battery, it is necessary to ensure that the rechargeable battery is in a micro-discharge state, that is, the cumulative charging capacity of the rechargeable battery within the target charging cycle is less than zero.

[0146] It should be noted that the cumulative charging capacity is the integral of the average value of the charging current of the rechargeable battery relative to the target charging cycle, and the average value of the charging current of the rechargeable battery is positively correlated with the target current and negatively correlated with the average value of the pulse working current, that is, the cumulative charging capacity is positively correlated with the target current, and the cumulative charging capacity is negatively correlated with the average value of the pulse working current. The value range of the target current can be calculated based on the established inequality, and the value of the target current can be selected within this value range according to actual needs.

[0147] For example, the target current is recorded as I0, and the average value of the pulse working current is recorded as I pTC,avg The target charging cycle duration is recorded as T, and the cumulative charging capacity is (I0-I PTC,avg )×T, let (I0-I PTC,avg )×T<0, and solve for the value range of I0.

[0148] The present disclosure controls the cumulative charging amount of the rechargeable battery within the target charging cycle to be less than zero, so that when the vehicle charging state is in the second state, the charging device can only supply power to the charging load, and the rechargeable battery is in a slightly discharged state, thereby avoiding overcharging of the rechargeable battery in this case.

[0149] In an exemplary embodiment of the present disclosure, Fig. 9 FIG. 1 is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 2 , Figure 8 Steps S802 to S804 are Fig. 9 The steps S902 to S904 in the embodiment correspond to each other and are not repeated here, and the following steps are also included.

[0150] In step S906, the charging mode type corresponding to the charging device is determined.

[0151] It should be noted that the charging methods corresponding to charging equipment can be divided into DC direct charging (such as DC charging piles) and AC to DC charging (such as OBC), and the current margins required to be reserved for the two charging methods may be different.

[0152] In step S908 , based on the charging mode type, an upper threshold of the target current is determined.

[0153] In some exemplary embodiments of the present disclosure, a third power required by other charging loads other than PTC is determined, and the charging bus voltage is determined. The third power is divided by the charging bus voltage to obtain a current value, and the current value is added to the average value of the pulse working current to obtain a threshold reference current value. In response to the charging mode type being direct current charging, the upper limit threshold is the threshold reference current value minus the margin value corresponding to direct current charging, for example, the threshold reference current value minus 1 ampere. In response to the charging mode type being AC to DC charging, the upper limit threshold is the threshold reference current value minus the margin value corresponding to AC to DC charging, for example, the threshold reference current value minus 0.5 ampere.

[0154] In step S910 , the determined target current is checked based on the upper threshold value.

[0155] It should be noted that the target current must be less than or equal to the upper threshold, that is, a new value range limit is given to the target current, and the value of the target current determined in step S804 is checked to see if it meets the new value range limit. If the check is successful, the corresponding target current output by the charging device is requested. If the check fails, the value of the target current is adjusted based on the new value range limit, or an error prompt is given to remind the user or the vehicle management system to troubleshoot.

[0156] The present disclosure further verifies the target current by reserving margins corresponding to different charging modes to ensure that the determined target current is not too large, thereby avoiding damage to the rechargeable battery.

[0157] In an exemplary embodiment of the present disclosure, another implementation process of step S108 in the vehicle charging control method is provided. Figure 8 or Fig. 9 On the basis of the implementation process shown, it also includes: determining the peak input current of the rechargeable battery based on the determined target current and the pulse working current of the positive temperature coefficient resistor; determining the maximum allowable charging current of the rechargeable battery; and verifying whether the peak input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery.

[0158] In Figure 8 The implementation process shown is based on an example, such as Fig.10 FIG. 1 is a flow chart of an implementation process of step S108 according to an exemplary embodiment of the present disclosure. Figure 3 , Figure 8 Steps S802 to S804 are Fig.10 The steps S1002 to S1004 in the embodiment correspond to each other and are not repeated here, and also include the following steps.

[0159] In step S1006, based on the determined target current and the pulse operating current of the positive temperature coefficient resistor, the input current peak value of the rechargeable battery is determined.

[0160] In step S1008, the maximum allowable charging current of the rechargeable battery is determined.

[0161] In step S1010, it is checked whether the peak value of the input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery.

[0162] It should be noted that the peak input current of the rechargeable battery can be derived based on the determined target current. In order to avoid damaging the rechargeable battery, it is checked whether the peak input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery. If it is lower, it indicates that the target current at this time is appropriate. If it is not lower than the target current, it indicates that if the charging device outputs the current according to the target current, the current entering the battery pack of the rechargeable battery will be higher than the maximum allowable charging current, and there is a risk of battery damage. At this time, the value of the target current is adjusted, or an error prompt is issued to remind the user or the vehicle management system to troubleshoot.

[0163] In an exemplary embodiment of the present disclosure, Fig.11 The figure shows the current flow direction when the vehicle is in the second charging state. Assuming that the target current output by the charging device is I0, the current flowing to the PTC is I PTC , the current flowing to other charging loads is I other , the current flowing to the charging battery is I battery As can be seen from the figure, I battery =I0-I PTC -I other , where I0 and I other Is a constant value.

[0164] like Fig.12 As shown, I PTC There are two current forms. When the PTC is working, the two circuits work in parallel and are both intermittently put into use. One working condition is as follows Fig.12 The non-overlapping image in the figure, that is, as shown in (3), the two PTCs are put into use intermittently, then the corresponding I battery The waveform diagram is as follows Fig.12 As shown in (5) in the figure. The minimum value of the PTC pulse working current is 0. At this moment, I battery The peak value of the input current of the rechargeable battery is greater than 0 and can be recorded as I battery,peak , I battery,peak =I0-I other In order to simplify the verification process, we can assume the most extreme working condition. other is 0, then I battery,peak =I0.

[0165] Another working situation is Fig.12The overlapping image in the figure, that is, as shown in (4), the two PTCs are put into use alternately but there is a period of time when the two PTCs are put into use at the same time. The corresponding I battery The waveform diagram is as follows Fig.12 As shown in (6) in the figure. The minimum value of the PTC pulse operating current is half of the peak value of the PTC pulse operating current, which can be expressed as 1 / 2×I PTC,peak , at this moment I battery The peak value of the input current of the rechargeable battery is greater than 0 and can be recorded as I battery,peak , I battery,peak =I0-I other -1 / 2×I PTC,peak In order to simplify the verification process, we can assume the most extreme working condition. other is 0, then I battery,peak =I0-1 / 2×I PTC,peak .

[0166] That is to say, check the I calculated in the above two working conditions battery,peak Whether it is less than the maximum allowable charging current of the rechargeable battery, the verification result is obtained. Figure 8 The control strategy shown has controlled the rechargeable battery to be in a slightly discharged state, but when the pulse operating current of the PTC is minimum, there is still input current entering the battery pack of the rechargeable battery. The present invention further ensures the safe use of the rechargeable battery by verifying that the peak value of the input current entering the battery pack is lower than the maximum allowable charging current.

[0167] A specific example of the vehicle charging control method provided by the embodiment of the present disclosure is now provided for further explanation.

[0168] In order to better explain the vehicle charging control method provided by the embodiment of the present disclosure, the control scheme for vehicle charging in the related art is first explained in order to control the battery pack to minimize the interference of current ripple. Fig.13 As shown, it is a schematic diagram of the simple connection relationship between the charging device, PTC and rechargeable battery in the related art. After the vehicle is in the energy replenishment condition, the main relay connected to the rechargeable battery is disconnected, that is, the main positive and main negative in the figure are disconnected, and the rechargeable battery is disconnected from the charging bus.

[0169] Since the vehicle state may change between charging and replenishing conditions, this control scheme requires the relay to be opened and closed back and forth, which not only makes the control process complicated and has low robustness, but also affects the working life of the relay. In addition, the voltage ripple on the bus is large, which will affect the life of the high-voltage components and the small battery on the low-voltage side powered by the high-voltage side. In addition, since the DC / DC converter that powers the small battery on the low-voltage side needs to be temporarily cut off during the process of the relay switching from closed to open, there is a risk of undervoltage feeding of the small battery. In addition, since the thermal management module needs to be temporarily cut off during the process of the relay switching from closed to open, the function of the on-board air conditioner will be stopped, affecting the user experience. In addition, when the state of the relay changes, the topology of the circuit connection changes, but the output power of the charging device depends on the load size and its rate of change, which will cause the charging device to delay the output power or the output power to be unstable, resulting in power failure due to undervoltage in the charging circuit.

[0170] When this specific example is implemented, the vehicle charging state is determined. When the vehicle charging state is the first state, two working conditions are divided based on the ripple state of the output current of the charging device.

[0171] In the first working condition, when the current ripple is small or does not exist, the preset charging output current I set 、The first demand current I 1d and the first maximum output current I 1outmax The value of the target current I0 is determined by the value of set , I 1d , I 1outmax}.

[0172] In the second working condition, when the current ripple is large, the input current peak of the rechargeable battery is set to be lower than the maximum allowable charging current. Based on the second demand current I 2d , calculate and determine the range of the average value of the target current, combining the range of the average value, the preset charging output current and the second maximum output current I 2ootmax , determine the target current. That is, I 0avg =min{I set ,I 2outmax ,1 / 2(I map +I 2d )}.

[0173] like Fig.14 As shown, it is a waveform diagram of the input current of the rechargeable battery of the experimental group controlled according to the control strategy provided by the embodiment of the present disclosure and the control group not controlled according to the control strategy provided by the embodiment of the present disclosure under the second working condition. As shown in the figure, the left side of the figure is the control group and the right side is the experimental group. It can be seen that the input current peak of the control group exceeds the maximum allowable charging current Imap , while the experimental group did not exceed, ensuring the charging safety of the rechargeable battery.

[0174] In particular, in the second operating condition, when the charging load includes PTC, I 2d The calculation is based on the effective value of the PTC pulse current.

[0175] When the vehicle charging state is the second state, the charging load includes PTC, which has a greater impact on the DC charging circuit. The target current is calculated based on the PTC pulse working current, with the cumulative charging power of the rechargeable battery within the target charging cycle being less than zero. In other words, Fig.12 In the input current waveform diagrams of the rechargeable battery shown in (5) and (6), the area enclosed by the waveform on the negative half axis of the ordinate is larger than the area enclosed by the waveform on the positive half axis of the ordinate, so that the rechargeable battery is in a slightly discharged state, avoiding overcharging of the rechargeable battery in this case.

[0176] After the target current is determined, the upper limit threshold of the target current determined by the charging mode type is used for verification. After the verification is passed, the peak value of the input current of the rechargeable battery is checked to see if it is lower than the maximum allowable charging current of the rechargeable battery. After the verification is passed, the charging device is requested to use the target current as the output current.

[0177] like Fig.15 As shown, when the vehicle is in the second state of charge, the current entering the battery pack of the two rechargeable batteries, that is, the input current, is obtained after the control strategy provided in the embodiment of the present disclosure. The waveform with a larger duty cycle corresponds to an embodiment in which the rechargeable battery has a larger power, and the bus voltage is larger. The waveform with a smaller duty cycle corresponds to an embodiment in which the rechargeable battery has a smaller power, and the bus voltage is smaller. It can be seen that in each cycle, it is ensured that the accumulated power entering the battery is a negative value, and the peak value is lower than the maximum allowable charging current corresponding to the battery.

[0178] Compared with the solutions provided by the related technologies introduced above, it can be seen that in this specific example, even if the vehicle state may change between the charging condition and the energy replenishing condition, there is no need to open and close the action relay back and forth, and the control process is highly robust; the voltage ripple on the charging bus is small, reducing the impact on the life of high-voltage components and small batteries; because the relay is continuously closed, there is no need to disconnect the DC / DC converter, and the risk of undervoltage feeding of the small battery can be avoided; because the relay is always closed, there is no need for thermal management, and the load is uninterrupted when the air conditioner is turned on, the function is not affected, and the user experience is good; because the relay is always closed, the circuit topology connected to the charging device does not change, even if the power is unstable, it can avoid power failure due to undervoltage in the charging circuit.

[0179] It should be noted that the acquisition, storage, use, and processing of information or data in the technical solution disclosed in this disclosure are in compliance with the relevant provisions of national laws and regulations.

[0180] Fig.16 1 is a block diagram of a vehicle charging control device according to some exemplary embodiments of the present disclosure. Fig.16 The device includes: a state determining unit 1601, a first determining unit 1602 and a second determining unit 1603.

[0181] A state determination unit 1601 is used to determine the charging state of the vehicle;

[0182] The first determining unit 1602 is used for detecting the output current of the charging device in the corresponding charging cycle in response to the vehicle charging state being the first state, determining the maximum output power of the charging device, the first power required by the charging battery of the vehicle, and the second power required by the charging load of the vehicle; and determining the target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power;

[0183] A second determining unit 1603 is used to determine a target current to be output by the charging device in response to the vehicle charging state being the second state, taking the input current of the charging battery being less than zero as a control target;

[0184] Among them, the vehicle charging state is a first state, and the charging device charges the rechargeable battery.

[0185] In some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0186] Based on the output current, determining a current ripple state of the output current;

[0187] A target current is determined based on the current ripple state, the maximum output power, the first power, and the second power.

[0188] In some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0189] In response to the current ripple state being a first target state, determining a charging bus voltage;

[0190] Calculate and determine a first demand current based on the charging bus voltage, the first power, and the second power;

[0191] Calculate and determine a first maximum output current based on the maximum output power and the charging bus voltage;

[0192] The first demand current and the first maximum output current are compared to determine the target current.

[0193] Further, in some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0194] Determine a preset charging output current;

[0195] The preset charging output current, the first required current and the first maximum output current are compared to determine the target current.

[0196] In some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0197] In response to the current ripple state being a second target state, determining a charging bus voltage;

[0198] Calculate and determine a second maximum output current based on the maximum output power and the charging bus voltage;

[0199] Calculating and determining a second required current based on the second power and the charging bus voltage;

[0200] Determine the maximum allowable charging current for rechargeable batteries;

[0201] The target current is determined by calculation based on the second required current, the second maximum output current, and the maximum allowable charging current.

[0202] Further, in some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0203] Determine a preset charging output current;

[0204] The target current is calculated and determined based on the preset charging output current, the second required current, the second maximum output current, and the maximum allowed charging current.

[0205] In some embodiments of the present disclosure, the first determining unit 1602 is configured to:

[0206] Specifically, the first determining unit 1602 is configured to:

[0207] With the goal of making the peak value of the input current of the charging battery lower than the maximum allowable charging current, based on the second demand current, the range of the average value of the target current is calculated and determined; wherein the peak value of the input current of the charging battery is positively correlated with the average value of the target current; the peak value of the input current of the charging battery is negatively correlated with the second demand current; the target current is determined based on the range of the average values ​​and the second maximum output current.

[0208] In some embodiments of the present disclosure, the charging load includes a positive temperature coefficient resistor.

[0209] In some embodiments of the present disclosure, the second determining unit 1603 is configured to:

[0210] Determining a pulse operating current of a positive temperature coefficient resistor; wherein the charging load includes a positive temperature coefficient resistor;

[0211] Taking the cumulative charging amount of the rechargeable battery within a target charging cycle as less than zero as a target, and calculating and determining a target current based on the pulse working current;

[0212] Among them, the cumulative charging capacity is positively correlated with the target current, and the cumulative charging capacity is negatively correlated with the average value of the pulse working current.

[0213] In some embodiments of the present disclosure, the second determining unit 1603 is further configured to:

[0214] Determine the type of charging method corresponding to the charging device;

[0215] Based on the type of charging mode, determine the upper threshold of the target current;

[0216] Based on the upper threshold value, the determined target current is verified.

[0217] In some embodiments of the present disclosure, the second determining unit 1603 is further configured to:

[0218] Determine the peak value of the input current of the charging battery based on the determined target current and the pulse working current of the positive temperature coefficient resistor;

[0219] Determine the maximum allowable charging current for rechargeable batteries;

[0220] Check whether the peak value of the input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery.

[0221] Regarding the device in the above embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.

[0222] Fig.17 1 is a block diagram of a vehicle 1700 according to an exemplary embodiment. For example, the vehicle 1700 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 1700 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0223] Reference Fig.17, the vehicle 1700 may include various subsystems, for example, an infotainment system 1710, a perception system 1720, a decision control system 1730, a drive system 1740, and a computing platform 1750. The vehicle 1700 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 1700 may be interconnected by wire or wireless means.

[0224] In some embodiments, the infotainment system 1710 may include a communication system, an entertainment system, and a navigation system, among others.

[0225] The perception system 1720 may include several sensors for sensing information about the environment around the vehicle 1700. For example, the perception system 1720 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0226] The decision control system 1730 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0227] The drive system 1740 may include components that provide powered motion for the vehicle 1700. In one embodiment, the drive system 1740 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0228] Some or all functions of the vehicle 1700 are controlled by a computing platform 1750. The computing platform 1750 may include at least one processor 1751 and a memory 1752, and the processor 1751 may execute instructions 1753 stored in the memory 1752.

[0229] The processor 1751 may be any conventional processor, such as a commercially available CPU. The processor may also include a data processor (Graphic Process Unit, GPU), a Field Programmable Gate Array (Field Programmable Gate Array, FPGA), a System on Chip (System on Chip, SOC), an Application Specific Integrated Circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0230] Memory 1752 can be implemented by any type of volatile or nonvolatile storage device or a combination thereof, 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 storage, flash memory, magnetic disk or optical disk.

[0231] In addition to instructions 1753 , memory 1752 may also store data, such as road maps, route information, vehicle location, direction, speed, etc. The data stored in memory 1752 may be used by computing platform 1750 .

[0232] In the embodiment of the present disclosure, the processor 1751 can execute instruction 1753 to complete all or part of the steps of the above-mentioned data processing method.

[0233] In some embodiments of the present disclosure, a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of a vehicle, enables the vehicle to perform the above-mentioned vehicle charging control method.

[0234] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0235] It should be understood that the present disclosure is not limited to the exact structures that have been 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

1. A vehicle charging control method, characterized in that: include: Determine vehicle charging status; In response to the vehicle charging state being a first state, detecting an output current of a charging device in a corresponding charging cycle, and determining a maximum output power of the charging device, a first power required by a charging battery of the vehicle, and a second power required by a charging load of the vehicle; Determine a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power; In response to the vehicle charging state being the second state, taking the average value of the input current of the charging battery in a target charging cycle being less than zero as a control target, determining a target current to be output by the charging device; The vehicle charging state is the first state, and the charging device charges the rechargeable battery.

2. The vehicle charging control method according to claim 1, characterized in that: Determining a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power includes: Based on the output current, determining a current ripple state of the output current; The target current is determined based on the current ripple state, the maximum output power, the first power, and the second power.

3. The vehicle charging control method according to claim 2, characterized in that: Determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power includes: In response to the current ripple state being a first target state, determining a charging bus voltage; Calculate and determine a first demand current based on the charging bus voltage, the first power, and the second power; Calculating and determining a first maximum output current based on the maximum output power and the charging bus voltage; The target current is determined by comparing the numerical values ​​of the first demand current and the first maximum output current.

4. The vehicle charging control method according to claim 3, characterized in that: Determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power, further comprising: Determine a preset charging output current; The step of comparing the first demand current and the first maximum output current to determine the target current includes: The target current is determined by comparing the numerical values ​​of the preset charging output current, the first required current and the first maximum output current.

5. The vehicle charging control method according to claim 2, characterized in that: Determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power includes: In response to the current ripple state being a second target state, determining a charging bus voltage; Calculating and determining a second maximum output current based on the maximum output power and the charging bus voltage; Calculating and determining a second required current based on the second power and the charging bus voltage; Determining the maximum allowable charging current of the rechargeable battery; The target current is determined by calculation based on the second required current, the second maximum output current, and the maximum allowable charging current.

6. The vehicle charging control method according to claim 5, characterized in that: Determining a target current requested to be output by the charging device based on the current ripple state, the maximum output power, the first power, and the second power, further comprising: Determine a preset charging output current; The step of calculating and determining the target current based on the second required current, the second maximum output current, and the maximum allowable charging current includes: The target current is calculated and determined based on the preset charging output current, the second required current, the second maximum output current, and the maximum allowable charging current.

7. The vehicle charging control method according to claim 5, characterized in that: The step of calculating and determining the target current based on the second required current, the second maximum output current, and the maximum allowable charging current includes: Taking the peak value of the input current of the rechargeable battery as lower than the maximum allowable charging current, based on the second demand current, the range of the average value of the target current is calculated and determined; wherein the peak value of the input current of the rechargeable battery is positively correlated with the average value of the target current; and the peak value of the input current of the rechargeable battery is negatively correlated with the second demand current; The target current is determined based on the range of the average value and the second maximum output current.

8. The vehicle charging control method according to claim 5, characterized in that: The charging load includes a positive temperature coefficient resistor.

9. The vehicle charging control method according to claim 1, characterized in that: Taking the average value of the input current of the rechargeable battery within the target charging cycle as less than zero as a control target, determining the target current requested to be output by the charging device includes: Determining a pulse operating current of a positive temperature coefficient resistor; wherein the charging load includes the positive temperature coefficient resistor; Taking the cumulative charging amount of the rechargeable battery within the target charging cycle as less than zero as a target, the target current is calculated and determined based on the pulse working current; The accumulated charging capacity is positively correlated with the target current, and the accumulated charging capacity is negatively correlated with the average value of the pulse working current.

10. The vehicle charging control method according to claim 9, characterized in that: Taking the average value of the input current of the rechargeable battery in the target charging cycle as less than zero as the control target, determining the target current requested to be output by the charging device, further comprising: Determine the charging mode type corresponding to the charging device; Based on the charging mode type, determining an upper threshold value of the target current; Based on the upper threshold value, the determined target current is verified.

11. The vehicle charging control method according to claim 9 or 10, characterized in that: Taking the average value of the input current of the rechargeable battery in the target charging cycle as less than zero as the control target, determining the target current requested to be output by the charging device, further comprising: Determining the input current peak value of the rechargeable battery based on the determined target current and the pulse operating current of the positive temperature coefficient resistor; Determining the maximum allowable charging current of the rechargeable battery; Check whether the peak value of the input current of the rechargeable battery is lower than the maximum allowable charging current of the rechargeable battery.

12. A vehicle charging control device, characterized in that: include: a state determination unit, for determining a vehicle charging state; a first determining unit, configured to detect an output current of a charging device in a corresponding charging cycle in response to the charging state of the vehicle being a first state, and determine a maximum output power of the charging device, a first power required by a charging battery of the vehicle, and a second power required by a charging load of the vehicle; Determine a target current requested to be output by the charging device based on the output current, the maximum output power, the first power, and the second power; a second determining unit, configured to determine, in response to the vehicle charging state being in the second state, a target current to be output by the charging device with the input current of the charging battery being less than zero as a control target; The vehicle charging state is the first state, and the charging device charges the rechargeable battery.

13. A vehicle, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Implement the steps of the vehicle charging control method described in any one of claims 1 to 11.

14. A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of a vehicle, the vehicle is enabled to execute a vehicle charging control method according to any one of claims 1 to 11.

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