Power supply control method and related device

Abstract

A power supply control method and a related device are applied to the field of vehicle intelligent control, in particular to a power supply circuit of a vehicle. The power supply control method comprises the steps that first information is obtained, the first information comprises a load demand of a first vehicle, and target output voltages of two DCDCs are determined to be a first voltage and a second voltage respectively based on the first information; the first voltage and the second voltage are different. By the adoption of the method, the power supply control device can distinguish different DCDC demand scenes based on the first information, in the different DCDC demand scenes, the high target output voltage and the low target output voltage of the two DCDCs are determined, the priority output power of the DCDC with the higher target output voltage is determined, the magnitude of the output power of the DCDC is close to or located in the output power range corresponding to the high-efficiency interval as much as possible, and the output power of the DCDC is improved. And the efficiency of the double-DCDC system is improved.

Description

Technical Field

[0001] This application relates to the field of intelligent vehicle control, and more particularly to a power supply control method and related devices. Background Technology

[0002] A DC-DC converter (DCDC) is an important component of a vehicle. It is mainly used to convert the DC power output from the high-voltage battery into the DC power required by the low-voltage electronic system, thus powering the vehicle's low-voltage electrical equipment and battery.

[0003] With the increasing number of electrical functions in vehicles, such as onboard water dispensers, onboard oxygen generators, and thermal management systems, low-voltage power consumption is high. The low-voltage load power of the entire vehicle exceeds the rated power capacity of a single DC-DC converter in the industry. Therefore, a dual DC-DC solution is needed to power the vehicle's low-voltage electrical equipment and battery. However, the efficiency of current dual DC-DC solutions is relatively low.

[0004] Therefore, a feasible solution is urgently needed to improve the efficiency of dual DC-DC converters. Summary of the Invention

[0005] This application discloses a power supply control method and related apparatus, which can improve the efficiency of a dual DC-DC system.

[0006] In a first aspect, embodiments of this application provide a power supply control method applied to the power supply circuit of a first vehicle. The power supply circuit includes a first DC-DC converter and a second DC-DC converter. For ease of description, a power supply control device is used as an exemplary execution subject in the following description. The power supply control method includes: First information is acquired, including the load requirements of the first vehicle. Based on this first information, the target output voltages of the two DC-DC converters are determined to be a first voltage and a second voltage, respectively. The first voltage and the second voltage are different.

[0007] Due to the inherent characteristics of DC-DC converters, their efficiency is closely related to their output power. A single DC-DC converter cannot achieve high efficiency simultaneously under both light load conditions (lower output power) and heavy load conditions (higher output power). Using the above method, the power supply control device can distinguish different DC-DC demand scenarios based on the first information, and determine the target output voltages of the two DC-DC converters to be high and low under different DC-DC demand scenarios. According to circuit characteristics, the DC-DC converter with the higher output voltage will prioritize outputting power to supply electrical equipment. If the DC-DC converter with the higher output voltage can meet the total load of the electrical equipment in the first vehicle, the DC-DC converter with the lower output voltage will not output power. Therefore, the power supply control device can determine which DC-DC converter has a higher target output voltage under different scenarios based on the first information, and thus prioritize outputting power. For example, when the total load of the first vehicle is small, the target output voltage of the DC-DC converter that achieves high efficiency under light load is determined to be the larger of the first voltage and the second voltage; when the total load of the first vehicle is large, the target output voltage of the DC-DC converter that achieves high efficiency under heavy load is determined to be the larger of the first voltage and the second voltage, so as to prioritize outputting power, so that both DC-DC converters can output with high efficiency when outputting power, thereby improving the efficiency of the dual DC-DC power supply system. Therefore, the power supply control method provided in this application embodiment can improve the efficiency of the dual DC-DC system.

[0008] In one possible implementation of the first aspect, the first efficiency ranges of the two DC-DC converters correspond to different output power ranges, and the first and second voltages are different to control the priority output power of the first or second DC-DC converter. For example, the first efficiency range is a high-efficiency range, such as an efficiency range greater than 90%. The power supply control device can, based on the output power ranges corresponding to the high-efficiency ranges of the two DC-DC converters and considering the current load requirements of the first vehicle, select the DC-DC converter whose output power range corresponding to the high-efficiency range is closer to the load requirements of the first vehicle as the larger of the first and second voltages, to prioritize its output power, thereby making the DC-DC converter more efficient.

[0009] In one possible implementation of the first aspect, the dual DC-DC system further includes a battery, and the first information includes any one or more of the following: the state of the first DC-DC, the state of the second DC-DC, the state of the first vehicle, the charge / discharge state of the battery, the temperature of the battery, and the battery capacity. It is understood that the power supply control device can also more accurately distinguish different DC-DC demand scenarios based on any one or more of the following: the state of the first DC-DC, the state of the second DC-DC, the state of the first vehicle, the charge / discharge state of the battery, the temperature of the battery, and the battery capacity, in order to more accurately adjust the output voltage of the two DC-DCs and improve the efficiency of the dual DC-DC system under various scenarios.

[0010] In one possible implementation of the first aspect, determining the target output voltages of the two DC-DC converters as a first voltage and a second voltage based on the first information includes: determining, based on the first information, that under a first condition, the target output voltage of the first DC-DC converter is the first voltage and the target output voltage of the second DC-DC converter is the second voltage; wherein the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first high efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0011] Specifically, when the power supply control device determines that the first condition is met based on the first information, it prioritizes the output power of the DC-DC (first DC-DC) with a smaller output power range corresponding to the first efficiency range (e.g., a high efficiency range with an efficiency greater than 60%). Therefore, the power supply control device sets the target output voltage of the first DC-DC to a higher voltage, i.e., the first voltage, so that the first DC-DC has higher efficiency under the condition of output power, thereby improving the efficiency of the dual DC-DC system.

[0012] In one possible implementation of the first aspect, the first condition includes one or more of the following: the load requirement of the first vehicle is less than a first power threshold; the second DC-DC converter is in a fault state; and the first vehicle is in a low-power mode.

[0013] For example, given that the load demand of the first vehicle is less than a first power threshold, it can be understood that the output power range corresponding to the first efficiency range of the first DC-DC converter is less than the output power range corresponding to the first high efficiency range of the second DC-DC converter. When the load demand of the first vehicle is less than the first power threshold, it is suitable for the first DC-DC converter to prioritize output power to meet the load demand, making the output power of the first DC-DC converter closer to the output power range corresponding to its first efficiency range, thereby improving working efficiency. For example, the first power threshold is a preset threshold, which can be adjusted according to actual conditions. For example, the first power threshold is less than the rated power of the first DC-DC converter. Also for example, the first power threshold is greater than the minimum output power value of the output power range corresponding to the first efficiency range of the first DC-DC converter.

[0014] For example, if the second DC-DC converter is in a faulty state, it can be understood that for a dual DC-DC system, when the second DC-DC converter is in a faulty state, the output power of the first DC-DC converter is used to meet the load requirements of the first vehicle, so as to ensure the normal operation of the low-voltage power system of the first vehicle.

[0015] For example, when the first vehicle is in a low-power mode, it can be understood that when the first vehicle is in a low-power mode, such as an economy driving mode, the power consumption of the first vehicle is low, and the load demand of the first vehicle is low. Assuming the load demand of the first vehicle is less than the first power threshold, similarly, the output power of the first DC-DC converter with a higher output voltage is selected to improve the efficiency of the first DC-DC converter, thereby improving the efficiency of the dual DC-DC system.

[0016] In one possible implementation of the first aspect, based on the first information, the target output voltages of the two DC-DC converters are determined to be a first voltage and a second voltage, respectively. Specifically, based on the first information, it is determined that, under the condition of satisfying a second condition, the target output voltage of the second DC-DC converter is the first voltage and the target output voltage of the first DC-DC converter is the second voltage; wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0017] Specifically, when the power supply control device determines that the second condition is met based on the first information, it prioritizes the output power of the DC-DC (second DC-DC) with a larger output power range corresponding to the first efficiency range (e.g., a high efficiency range with an efficiency greater than 60%). Therefore, the power supply control device sets the target output voltage of the second DC-DC to a higher voltage, i.e., the first voltage, so that the second DC-DC is more efficient in terms of output power, thereby improving the efficiency of the dual DC-DC system.

[0018] Optionally, the target output voltage of the second DC-DC converter being the first voltage can include at least the following two cases: In scenario one, if the second DC-DC converter can meet the load requirements of the first vehicle, since the target output voltage of the second DC-DC converter is higher than that of the first DC-DC converter, only the output power of the second DC-DC converter supplies power to the electrical equipment and / or the battery, and the first DC-DC converter does not output power.

[0019] In scenario two, if the second DC-DC converter cannot meet the load requirements of the first vehicle, even if the power supply control device determines that the target output voltage of the second DC-DC converter is higher than the target output voltage of the first DC-DC converter, the second DC-DC converter cannot continuously maintain the output of the first voltage because it cannot meet the load requirements of the first vehicle. The actual output voltage of the second DC-DC converter will gradually decrease until it approaches or equals the second voltage. At this time, the first DC-DC converter also outputs power, and both DC-DC converters output power to supply power to the electrical equipment and / or the battery.

[0020] In one possible implementation of the first aspect, the second condition includes one or more of the following: the first DC-DC converter is in a faulty state; the load demand of the first vehicle is greater than the first power threshold; the battery capacity is less than the first capacity threshold and is in a discharging state; the battery temperature is less than the first temperature threshold; and the output power capability of the first DC-DC converter and / or the second DC-DC converter is attenuated.

[0021] For example, if the first DC-DC converter is in a faulty state, in order to ensure the normal operation of the power supply system of the first vehicle, the output power of the second DC-DC converter is prioritized to power the electrical equipment and / or the battery. Therefore, the target output voltage of the second DC-DC converter is determined to be the higher first voltage.

[0022] For example, if the load demand of the first vehicle is greater than the first power threshold, since the output power range corresponding to the first efficiency range of the first DC-DC (e.g., the efficiency range greater than 60%) is smaller than the output power range corresponding to the first efficiency range of the second DC-DC (e.g., the efficiency range greater than 60%), when the load demand of the first vehicle is large, the DC-DC (second DC-DC) with higher efficiency under the condition of higher output power is selected to output power first. This makes the output power of the second DC-DC closer to the output power range corresponding to the high efficiency range, making the second DC-DC more efficient, thereby improving the efficiency of the dual DC-DC system.

[0023] Optionally, if the first power threshold is greater than the rated power of the first DC-DC converter, and the first DC-DC converter alone cannot meet the load requirements of the first vehicle, then the output power of the second DC-DC converter will be prioritized.

[0024] For example, if the battery capacity of the conditional storage battery is less than the first capacity threshold and is in a discharging state, it can be understood that the current output power of the DC-DC converter cannot meet the power demand of the electrical equipment, and the battery needs to discharge to provide power to the electrical equipment. Therefore, in this state, the DC-DC converter needs to output more power to meet the power demand of the electrical equipment. Refer to the relevant description above regarding the case of a large load demand of the first vehicle; it will not be repeated here. Optionally, if the rated output power of the first DC-DC converter is less than the rated output power of the second DC-DC converter, and the first DC-DC converter cannot meet the load demand of the first vehicle, the second DC-DC converter can preferentially output power to meet the load demand of the first vehicle.

[0025] For example, if the temperature of the battery is lower than the first temperature threshold, it can be understood that the low battery temperature affects the battery's discharge capacity. If the power demand of the electrical equipment suddenly increases, the current output power of the DC-DC converter cannot meet the power demand of the electrical equipment. If the battery's discharge capacity is weak at this time, it may lead to insufficient power supply to the power supply system of the first vehicle, affecting the normal power supply of the electrical equipment.

[0026] Optionally, if the rated power of the first DC-DC converter is less than the rated power of the second DC-DC converter, or the output power capability of the first DC-DC converter is less than the output power capability of the second DC-DC converter, in order to ensure the stability of the power supply system of the first vehicle when the battery temperature is low, the output power of the second DC-DC converter is prioritized for the power consumption of the electrical equipment, so as to avoid insufficient output power of the DC-DC converter when the power demand of the electrical equipment suddenly increases.

[0027] Optionally, for case one of the above implementation methods, the second condition may include any one or more of the following: the first DC-DC converter is in a fault state, the load demand of the first vehicle is greater than the first power threshold, and the battery capacity is less than the first capacity threshold and is in a discharging state. In this case, optionally, the first power threshold is less than the rated output power of the second DC-DC converter.

[0028] Alternatively, in case two of the above implementation methods, the second condition may include any one or more of the following: the load demand of the first vehicle is greater than the first power threshold, the battery capacity is less than the first capacity threshold and is in a discharging state, the battery temperature is less than the first temperature threshold, and the output power capability of the first DC-DC and / or the second DC-DC is attenuated.

[0029] In one possible implementation of the first aspect, the first voltage is the replenishment voltage of the battery, and the second voltage is the larger of the first voltage minus the first voltage difference and the minimum replenishment voltage of the battery. It is understood that the power supply control device can adjust the target output voltages of the two DC-DC converters according to the battery's state and charging requirements, so that the first DC-DC converter and / or the second DC-DC converter can replenish the battery, ensuring the normal operation and stability of the power supply system.

[0030] In one possible implementation of the first aspect, the dual DC-DC system further includes an automatic protection switch (APS). When the APS is closed, the first DC-DC converter and the second DC-DC converter are connected in parallel. The first information also includes the state of the APS. It can be understood that introducing an APS into the dual DC-DC system, with the two DC-DC converters connected in parallel to power the electrical equipment and / or battery when the APS is closed, and the APS quickly disconnecting to protect the other DC-DC converter from damage, enhances the isolation performance and stability of the dual DC-DC system. Furthermore, the power supply control device can determine the output voltage of the two DC-DC converters based on the state of the APS to more accurately adjust their output voltages.

[0031] In one possible implementation of the first aspect, based on the first information, the target output voltages of the two DC-DC converters are determined to be a first voltage and a second voltage, respectively. Specifically, this includes: with the APS closed, determining the target output voltages of the two DC-DC converters to be a first voltage and a second voltage, respectively, based on the first information. It can be understood that only when the APS is closed, i.e., when the two DC-DC converters are connected in parallel and output power, will the output voltage difference between the two DC-DC converters affect the priority of their output power; for example, the DC-DC converter with the higher output voltage will have priority in output power.

[0032] In one possible implementation of the first aspect, the power supply control method further includes: detecting a first current flowing through the APS when the APS is closed; if the first current is greater than a first current threshold, controlling the voltage difference across the APS to be less than the first voltage threshold. It is understood that if the current flowing through the APS is too large, or the voltage difference across the APS is too large, it may cause the APS to erroneously disconnect. The power supply control device can detect the magnitude of the current flowing through the APS; if the current is too large, it can adjust the voltage across the APS to reduce the voltage difference across the APS and prevent the APS from erroneously disconnecting.

[0033] In one possible implementation of the first aspect, the power supply control method further includes: when the APS is in the off state, determining that the target output voltage of both DC-DC converters is a first voltage. It can be understood that when the APS is off, the two DC-DC converters independently supply power to the electrical equipment and / or the battery. Therefore, the power supply control device determines the target output voltage of both DC-DC converters to the first voltage, such as the battery's charging voltage, so that both DC-DC converters can charge the battery, ensuring the normal operation of the dual DC-DC system.

[0034] In one possible implementation of the first aspect, the APS disconnection state includes abnormal APS disconnection or erroneous APS disconnection. The power supply control method further includes: in the case of erroneous APS disconnection, detecting a second voltage difference across the APS. If the second voltage difference is less than a first voltage difference threshold, then controlling the APS to close. Using this method, in the case of erroneous APS disconnection, if the power supply control device detects that the APS meets the closing conditions, it controls the APS to close, allowing the two DC-DC converters to output power in parallel to supply power to the electrical equipment and / or the battery. This facilitates the control of the first or second DC-DC converter to prioritize power output for different DC-DC demand scenarios, thereby improving the efficiency of the dual DC-DC system.

[0035] In one possible implementation of the first aspect, obtaining the first information specifically includes: obtaining the first information after the first vehicle has been powered on for a first period of time. Specifically, within the first period of time, the first DC-DC converter enters the power-on state earlier than the second DC-DC converter, and the power-on time of the first DC-DC converter is separated from the power-on time of the second DC-DC converter by a second period of time, which is shorter than the first period of time. For example, after the first vehicle has been powered on for a period of time, and after both DC-DC converters have turned on and the electrical equipment and / or battery have started consuming power, the power supply control device can obtain the first information, such as the load demand of the first vehicle. Optionally, within the first period of time immediately after the first vehicle is powered on, the first DC-DC converter and the second DC-DC converter can turn on sequentially with a second period of time interval to avoid the simultaneous operation of the two DC-DC converters causing excessive instantaneous current in the circuit and triggering the circuit's microsecond-level protection.

[0036] In one possible implementation of the first aspect, the power supply control method further includes: within a first time period, after the first DC-DC converter is turned on, determining the target output voltage of the first DC-DC converter as a first voltage. After the second DC-DC converter is turned on, determining the target output voltage of the second DC-DC converter as a second voltage. Wherein, the first voltage is greater than the second voltage. It can be understood that when the first vehicle is first powered on, the power supply control device has not yet acquired the first information and cannot determine the appropriate DC-DC converter's priority output power based on the first information. Therefore, the voltage of the DC-DC converter that is turned on first can be set as the first voltage to prioritize its output power and ensure the normal power supply of the first vehicle's electrical equipment.

[0037] Optionally, the output power range corresponding to the first efficiency range of the first DC-DC is smaller than the output power range corresponding to the first efficiency range of the second DC-DC. When the first vehicle is powered on, the electrical equipment starts working one after another, and the load demand of the first vehicle is relatively small. The power supply control device can set the voltage of the DC-DC (first DC-DC) that achieves high efficiency under light load conditions to a higher first voltage to prioritize output power and improve the efficiency of the dual DC-DC system.

[0038] In one possible implementation of the first aspect, the DC-DC converter with a target output voltage of the second voltage is in a hot standby state, where hot standby state means that the DC-DC converter is in an unloaded state with output voltage but no output power. Although the DC-DC converter in the hot standby state does not output power, it can quickly start to output power when output power is needed (e.g., when the other DC-DC converter is insufficient or has failed), so as to ensure the stability of the first vehicle power supply system.

[0039] In one possible implementation of the first aspect, the DC-DC converter with a target output voltage of the second voltage is in a cold standby state, or the flyback auxiliary power supply of the DC-DC converter with a target output voltage of the second voltage is turned off; wherein, the cold standby state indicates that the DC-DC converter is in a standby state with no output voltage and current, and the flyback auxiliary power supply is the auxiliary power supply inside the DC-DC converter. In this method, setting the DC-DC converter without output power to a cold standby state or turning off the flyback auxiliary power supply of the DC-DC converter can reduce the power consumption of the DC-DC converter, thereby reducing the power consumption of the power supply system.

[0040] In one possible implementation of the first aspect, the power supply control method further includes: when the target output voltage of the second DC-DC is determined to be the second voltage, obtaining a third duration during which the second DC-DC continuously does not output power; when the third duration is greater than a first duration threshold, determining that the target output voltage of the second DC-DC is the first voltage; obtaining a first amount of power output by the second DC-DC in a non-no-load state; when the first amount of power is greater than a second amount of power threshold, obtaining first information; and based on the first information, determining that the target output voltages of the two DC-DCs are the first voltage and the second voltage, respectively.

[0041] It is understandable that when the target output voltage of the second DC-DC converter is the second voltage and the target output voltage of the first DC-DC converter is the first voltage, the second DC-DC converter will not output power. To avoid the second DC-DC converter's lifespan being reduced due to prolonged periods of no power output, if the power supply control device detects that the second DC-DC converter is in a non-output power state for a long period, the target output voltage of the second DC-DC converter can be determined as the first voltage, allowing the second DC-DC converter to output power. After the second DC-DC converter outputs power for a period of time (after the first output of power), the problem of second DC-DC converter lifespan degradation can be effectively mitigated. Furthermore, the power supply control device can continue to aim at improving the efficiency of the dual DC-DC system, obtaining first information to determine whether the voltage of the first or second DC-DC converter is the first voltage for priority power output. Using this method, not only can the DC-DC converter lifespan degradation problem be mitigated, but the efficiency of the dual DC-DC system can also be improved.

[0042] Secondly, embodiments of this application provide a power supply control device, which includes units for performing the method as described in any of the first aspects.

[0043] In one possible design, the device includes: The acquisition unit is used to acquire first information, which includes the load requirements of the first vehicle.

[0044] The processing unit is used to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, wherein the first voltage and the second voltage are different.

[0045] In one possible implementation, the processing unit is specifically configured to determine, based on first information, that under a first condition, the target output voltage of the first DC-DC converter is a first voltage, and the target output voltage of the second DC-DC converter is a second voltage. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0046] In one possible implementation, the processing unit is specifically configured to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively, including: based on the first information, determining that, under a second condition, the target output voltage of the second DC-DC converter is the first voltage, and the target output voltage of the first DC-DC converter is the second voltage. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0047] In one possible implementation, the processing unit is specifically configured to, when the APS is in the closed state, determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively.

[0048] In one possible implementation, the processing unit is specifically configured to detect a first current flowing through the APS when the APS is closed; if the first current is greater than a first current threshold, control the voltage difference across the APS to be less than a first voltage threshold.

[0049] In one possible implementation, the processing unit is specifically configured to determine, when the APS is in the off state, that the target output voltages of both DC-DC converters are the first voltage.

[0050] In one possible implementation, the processing unit is specifically configured to detect a second voltage difference across the APS in the event of an APS erroneously disconnecting, and if the second voltage difference is less than a first voltage difference threshold, control the APS to close.

[0051] In one possible implementation, the processing unit is specifically configured to, within a first time period, determine the target output voltage of the first DC-DC converter as a first voltage after the first DC-DC converter is powered on; and determine the target output voltage of the second DC-DC converter as a second voltage after the second DC-DC converter is powered on. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0052] In one possible implementation, the acquisition unit is specifically used to acquire a third duration of continuous no power output by the second DC-DC when the target output voltage of the second DC-DC is determined to be a second voltage.

[0053] The processing unit is specifically used to determine the target output voltage of the second DC-DC converter as the first voltage when the third time is greater than the first time duration threshold.

[0054] The acquisition unit can also be used to acquire the first charge output by the second DC-DC converter when it is in a non-no-load state.

[0055] The acquisition unit can also be used to acquire first information when the first power level is greater than the second power level threshold. The processing unit can also be used to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively.

[0056] The steps performed by the acquisition unit and processing unit described in the second aspect and any possible implementation can be referred to the corresponding implementations in the first aspect.

[0057] For the technical effects of the second aspect and any possible implementation, please refer to the description of the technical effects corresponding to the first aspect and the corresponding implementation.

[0058] Optionally, in the power supply control device described in the second aspect above and any possible implementation: In one implementation, the power supply control device is a power supply control equipment. When the power supply control device is a power supply control equipment, the acquisition unit can be a transceiver or an input / output interface; the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0059] In another implementation, the power supply control device is a chip (system) or circuit used in a power supply control device. When the power supply control device is a chip (system) or circuit used in a power supply control device, the acquisition unit can be a communication interface (input / output interface), interface circuit, output circuit, input circuit, pin, or related circuit on the chip (system) or circuit; the processing unit can be at least one processor, processing circuit, or logic circuit.

[0060] Thirdly, embodiments of this application provide a power supply control device, which includes a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the methods described in the first aspect and any of the possible implementations. Optionally, the power supply control device further includes a memory. Optionally, the power supply control device further includes a communication interface, and the processor is coupled to the communication interface.

[0061] Fourthly, embodiments of this application provide a chip, including: logic circuitry and a communication interface. The communication interface is used to receive or send information; the logic circuitry is used to receive or send information through the communication interface, causing the chip to execute the methods described in the first aspect and any of the possible implementations.

[0062] Fifthly, embodiments of this application provide a power supply control system, which includes a power supply control device and a power supply circuit, the power supply circuit including a first DC-DC converter and a second DC-DC converter; wherein the power supply control device is used to perform the method as described in any one of the first aspects to achieve priority output power of the first DC-DC converter and / or the second DC-DC converter.

[0063] Sixthly, embodiments of this application provide a terminal, which includes the power supply control device described in any of the second aspects, or the power supply control device described in the third aspect, or the chip described in the fourth aspect, or the power supply control system described in the fifth aspect.

[0064] Optionally, the terminal can be a means of transportation, such as a vehicle, truck, aircraft, drone, slow transport vehicle, spacecraft, or ship, or any other possible means of transportation used in any possible scenario. This application embodiment does not limit this.

[0065] Optionally, the terminal is used to implement the method described in the first aspect and any possible implementation.

[0066] In a seventh aspect, embodiments of this application provide a computer-readable storage medium for storing a computer program (also referred to as code or instructions); when the computer program is run on a computer, the methods described in the first aspect and any possible implementation are implemented.

[0067] Eighthly, embodiments of this application provide a computer program product comprising: a computer program (also referred to as code or instructions); and, when the computer program is run, causing a computer to perform the methods described in the first aspect and any of the possible implementations.

[0068] Furthermore, in the process of performing the method described in the first aspect and any possible implementation above, the processes related to sending and / or receiving information in the above methods can be understood as the process of the processor outputting information, and / or the process of the processor receiving input information. When outputting information, the processor can output the information to a transceiver (or communication interface, or transmitting module) so that the transceiver can transmit it. After the information is output by the processor, it may need to undergo other processing before reaching the transceiver. Similarly, when the processor receives input information, the transceiver (or communication interface, or transmitting module) receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may need to undergo other processing before being input to the processor.

[0069] Based on the above principles, for example, the information sent mentioned in the aforementioned method can be understood as information output by the processor. Similarly, the information received can be understood as information received by the processor from input.

[0070] Optionally, unless otherwise specified, or unless they contradict their actual function or internal logic in the relevant description, the operations of the processor, such as transmitting, sending, and receiving, can be more generally understood as processor output and receiving, input, and other operations.

[0071] Optionally, in performing the methods described in the first aspect and any possible implementation above, the processor may be a processor specifically designed to perform these methods, or it may be a processor that performs these methods by executing computer instructions stored in memory, such as a general-purpose processor. The memory may be a non-transitory memory, such as read-only memory (ROM), which may be integrated with the processor on the same chip or disposed on different chips. This application does not limit the type of memory or the arrangement of the memory and processor.

[0072] In one possible implementation, at least one of the aforementioned memories is located outside the device.

[0073] In yet another possible implementation, at least one of the aforementioned memories is located within the device.

[0074] In another possible implementation, a portion of the memory of the at least one memory is located inside the device, while another portion is located outside the device.

[0075] In this application, the processor and memory may also be integrated into a single device, that is, the processor and memory can be integrated together. Attached Figure Description

[0076] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0077] Figure 1 This is a schematic diagram comparing the efficiency curves of two DC-DC converters provided in an embodiment of this application; Figure 2 This is a schematic diagram of the architecture of a power supply circuit provided in an embodiment of this application; Figure 3 This is a schematic diagram of another power supply circuit architecture provided in the embodiments of this application; Figure 4 This is a schematic flowchart of a power supply control method provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a power supply control device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described below with reference to the accompanying drawings.

[0079] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0080] The term "embodiment" as used herein means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the various embodiments of this application are consistent and can be mutually referenced, and technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0081] It should be understood that in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0082] It should be noted that, in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of instructing A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A.

[0083] In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is a correlation between the other information and the information to be instructed. It can also indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various information, thereby reducing instruction overhead to some extent. The information to be instructed can be sent as a whole or divided into multiple sub-information units, and the sending period and / or timing of these sub-information units can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information units can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0084] It should be noted that in this application, "send" can be understood as "output" and "receive" can be understood as "input". "Send information to A", where "to A" simply indicates the direction of information transmission, and A is the destination, does not limit "send information to A" to a direct transmission over the air interface. "Send information to A" includes sending information directly to A, as well as sending information indirectly to A through a transmitter. Therefore, "send information to A" can also be understood as "outputting information destined for A". Similarly, "receive information from A" indicates that the source of the information is A, including receiving information directly from A, as well as receiving information indirectly from A through a receiver. Therefore, "receive information from A" can also be understood as "inputting information from A".

[0085] This application provides a power control method and related apparatus, applied in the field of vehicle intelligent control, such as DC-DC output power control of vehicles. To better understand the technical solution of this application, the relevant terms and concepts that may be involved in the embodiments of this application are introduced below.

[0086] DC-DC (or DC-DC converter): A DC-DC converter is a high-frequency power conversion device that mainly utilizes switching devices (such as MOSFETs). By periodically controlling the switching of these devices, pulse modulation of the input voltage is achieved to realize voltage conversion and automatic voltage regulation. A DC-DC converter is a switching power supply with both input and output voltage types being DC. It is used to convert high-voltage DC to low-voltage DC, for example, to stably convert the high-voltage DC (e.g., 300V-500V) from a vehicle's power battery into low-voltage DC (e.g., 12V) to power low-voltage electrical equipment and the battery in the vehicle. The efficiency of a DC-DC converter is the ratio of its output power to its input power. In other words, the higher the efficiency of the DC-DC converter, the higher its power conversion efficiency.

[0087] For multi-DC-CDC systems, such as dual-DC-CDC systems, the efficiency of a dual-DC-CDC system is the ratio of the sum of the output power of the two DC-CDCs to the sum of their input power. It can be understood that when both DC-CDCs output power, the higher the efficiency of each DC-CDC, the higher the efficiency of the dual-DC-CDC system. When only one of the two DC-CDCs outputs power, the efficiency of the dual-DC-CDC system is equal to the efficiency of the DC-CDC with that output power; the higher the efficiency of that DC-CDC with that output power, the higher the efficiency of the dual-DC-CDC system.

[0088] Intelligent charging scenario: Intelligent charging scenario is a proactive management strategy of modern vehicle energy management systems. Its core lies in continuously monitoring multi-dimensional information such as battery status, vehicle operating conditions, and user habits. For example, when the vehicle is parked, it continuously monitors the battery status, intelligently predicts potential battery depletion risks, and automatically selects the optimal time (such as during efficient cruising or kinetic energy recovery) and the optimal strategy (such as adjusting the DC-DC output voltage for constant voltage fast charging or float charging) to replenish the battery in a seamless manner. This not only ensures the battery is always in optimal working condition, effectively preventing breakdowns due to depletion, but also significantly improves overall vehicle energy efficiency and extends battery life by optimizing the charging process, ultimately providing users with a more reliable and worry-free driving experience.

[0089] With the increasing number of electrical functions in vehicles, such as onboard water dispensers, onboard oxygen generators, and thermal management systems, the power consumption of low-voltage electrical equipment is increasing. The low-voltage load power of the entire vehicle exceeds the rated power capability of a single DC-DC converter (i.e., the maximum power that a single DC-DC converter can stably output). Therefore, a multi-DC-DC solution, such as a dual-DC-DC solution, is needed to power low-voltage electrical equipment and batteries. How to improve the efficiency of dual-DC-DC systems is a pressing problem and challenge that needs to be solved.

[0090] It is worth noting that different DC-DC converters may have the same or different characteristics (e.g., rated power, efficiency curves, etc.). See also Figure 1 , Figure 1 This is a schematic diagram comparing the efficiency curves of two DC-DC converters provided in an embodiment of this application, such as... Figure 1 As shown, the first and second DC-DC converters have different rated power. The first DC-DC converter has a rated power of 2kW, meaning it can continuously and stably output a maximum power of 2kW, while the second DC-DC converter has a rated power of 3.5kW. Furthermore, the efficiency curves of the first and second DC-DC converters are different (or, the output power range corresponding to their high efficiency ranges are different), as shown below. Figure 1 As shown, the output power ranges corresponding to the high efficiency ranges of the first DC-DC and the second DC-DC are different. For example, the first DC-DC is more efficient under light load conditions (lower output power), while the second DC-DC is more efficient under heavy load conditions (higher output power).

[0091] In some dual-DC-CDC systems, a single main DC-CDC output power is primarily used. If this main DC-CDC cannot meet the vehicle's load requirements, a backup DC-CDC is activated, and multiple DC-CDCs output power together. However, this approach does not offer effective methods to improve the efficiency of multi-DC-CDC systems.

[0092] Therefore, this application proposes a power supply control method to improve the efficiency of a dual DC-DC system.

[0093] The following provides an exemplary description of the systems and scenarios in which this application may be applied. It should be noted that the system architecture and business scenarios described in this application are for the purpose of more clearly illustrating the technical solutions of this application and do not constitute a limitation on the technical solutions provided in this application. Those skilled in the art will understand that, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in this application are equally applicable to similar technical problems.

[0094] Please see Figure 2 , Figure 2 This is a schematic diagram of the architecture of a power supply circuit according to an embodiment of this application, as shown below. Figure 2 As shown, the power supply circuit includes a power battery 101, a first DC-DC converter (102), a second DC-DC converter (103), a storage battery 104, a controller 105, and an electrical device 106.

[0095] The following is about Figure 2 The various devices included herein are described by way of example: Among them, the power battery 101 is used to store high-voltage direct current, directly providing high-voltage and high-current to the drive motor to ensure the vehicle's power performance, or to supply power to the vehicle's high-voltage electrical equipment, serving as the vehicle's energy source.

[0096] The first DC-DC converter (102) and the second DC-DC converter (103) are used to convert the high-voltage electricity output from the power battery 101 into low-voltage electricity to power the storage battery 104 and the electrical equipment 106. The first DC-DC converter (102) and the second DC-DC converter (103) together constitute a dual DC-DC system 1000. Based on the circuit characteristics of the dual DC-DC system, in... Figure 2 In the system architecture of dual DC-DC parallel connection shown, both the first DC-DC (102) and the second DC-DC (103) can supply power to electrical equipment and batteries. When the output voltages of the first DC-DC (102) and the second DC-DC (103) are different (there is a voltage difference), the DC-DC with the larger output voltage will output power first. Therefore, the output power of the two DC-DCs can be adjusted by adjusting the output voltage of the two DC-DCs.

[0097] The battery 104 serves as a backup power source for the voltage power supply system. When the vehicle is in sleep mode or the DC-DC converter is not working or malfunctioning, it provides power to the electrical equipment 106 (such as headlights, dashboard, key receiver, etc.) to ensure that the vehicle can be unlocked, started, and parked safely. The number of batteries 104 can be one or more, and there is no specific limitation here.

[0098] The controller 105 has the ability to adjust the output voltage of the first DC-DC converter (102) and the second DC-DC converter (103). Optionally, the controller 105 can also acquire the status information of the battery 104. The controller 105 can dynamically adjust the output voltage of the first DC-DC converter (102) and the second DC-DC converter (103) according to the status of the battery 104. For example, when the controller 105 acquires that the voltage or charge of the battery 104 is low, that is, when the battery 104 needs a large current for fast charging, it can adjust the output voltage of the first DC-DC converter and / or the second DC-DC converter to be higher than the voltage of the battery and the voltage difference is large. It can be understood that the larger the voltage difference between the output voltage of the DC-DC converter and the voltage of the battery, the larger the current and the faster the charging speed. Correspondingly, when the controller acquires that the battery 104 needs a small current for slow charging, it can adjust the output voltage of the first DC-DC converter and / or the second DC-DC converter to be slightly higher than the voltage of the battery.

[0099] Furthermore, according to the circuit characteristics of a dual DC-DC system, the DC-DC with the higher output voltage prioritizes output power. Therefore, the controller 105 can adjust the output power of the first DC-DC (102) and the second DC-DC (103) by adjusting the output voltages of the two DC-DCs. For example, the output voltage V_1 of the first DC-DC (102) can be adjusted by sending signal a to the first DC-DC (102), and the output voltage V_2 of the second DC-DC (103) can be adjusted by sending signal b to the second DC-DC (103). Specifically, the controller 105 may include software modules and / or hardware modules. For example, the controller 105 may include at least one processor, which is a module with processing capabilities, such as a central processing unit (CPU), microprocessor (MPU), microcontroller unit (MCU), graphics processing unit (GPU), application-specific integrated circuit (ASIC), programmable logic device (PLD), etc. As another example, power supply control may include software modules, such as one or more of an executable computer program, computer code, or computer instructions.

[0100] As one possible implementation example, controller 105 can be located in a vehicle, such as an on-board component. Exemplarily, controller 105 may include one or more of a domain controller (DC), a battery management system (BMS), etc. The domain controller includes a vehicle domain controller (VDC), but may also be a domain controller under other functional domain partitioning architectures.

[0101] In one possible implementation, the controller 105 may also have the ability to acquire data, such as first information, which includes one or more of the following: information about the first vehicle, information about the first DC-DC converter, information about the second DC-DC converter, and information about the battery.

[0102] Of course, the above description assumes that the controller 105 is an in-vehicle device. In some solutions, the controller 105 can be a physical device located outside the vehicle, such as a server, cloud, or host, which communicates and transmits information with the vehicle. As one possible implementation, the controller 105 can be a software module, such as a virtual machine, software, program code, or container.

[0103] In one possible example, Figure 2 The dual DC-DC system shown may also include an automatic protection switch (APS). The first DC-DC (102) and the second DC-DC (103) are connected in parallel when the APS is closed, that is, the APS is located on the parallel branch of the first DC-DC (102) and the second DC-DC (103). The APS is used to monitor the current and voltage in the circuit and quickly cut off the power supply in case of excessive current, abnormal voltage, or short circuit, so as to protect the circuit and provide isolation performance guarantee.

[0104] See Figure 3 , Figure 3 This is a schematic diagram of another power supply circuit architecture provided in the embodiments of this application, such as... Figure 3 As shown, the dual DC-DC system 3000 also includes an APS. Under normal conditions, the APS is in a closed state, and the first DC-DC (102) and the second DC-DC (103) are connected in parallel to supply power to the battery 104 and the electrical equipment 106. In this case, the system adopts an APS redundant power distribution scheme, and the first DC-DC (102) and the second DC-DC (103) are interconnected or isolated through the APS. For example, if the first DC-DC (102) fails and cannot output power normally, the second DC-DC (103) can supply power to both circuits through the APS branch. When the current flowing through the APS or the voltage across the APS is abnormal, the APS is in the off state, and the first DC-DC (102) and the second DC-DC (103) are powered independently. For example, if the first DC-DC (102) is short-circuited, resulting in an excessive instantaneous current, the APS will quickly disconnect to protect the second DC-DC (103), so that the redundant second DC-DC (103) can output power normally, avoiding the simultaneous shutdown of the two DC-DCs and improving the reliability of the system.

[0105] Figure 3This example illustrates the concept of APS located in the first DC-DC converter (102). In some schemes, APS may also be located in the second DC-DC converter (103), and its working state and basic principle can be found in the above description. In other schemes, APS is neither located in the first DC-DC converter (102) nor in the second DC-DC converter (103), but is located in a parallel branch between the first DC-DC converter (102) and the second DC-DC converter (103). In still other schemes, APS may be included in both the first DC-DC converter (102) and the second DC-DC converter (103), which will not be described in detail here.

[0106] The methods of the embodiments of this application will be described in detail below.

[0107] See Figure 4 , Figure 4 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. This power supply control method can be applied to... Figure 2 or Figure 3 The architecture shown, for example, is applied to Figure 3 The method described is a dual-DC-CDC system designed to improve its efficiency. This method can also be applied to other dual-DC-CDC system architectures.

[0108] This power supply control method is applied to the dual DC-DC system of a first vehicle. The dual DC-DC system includes a first DC-DC converter, a second DC-DC converter, and a battery. The method includes steps S401 to S402, which are as follows: Step S401: The power supply control device acquires the first information.

[0109] It is understood that the power supply control device in the embodiments of this application can be a device equipped with a processor / chip that can execute computer execution instructions, or it can be a processor / chip that can execute computer execution instructions. Optionally, the power supply control device can be an electronic device, or it can be a processor / chip within an electronic device. Optionally, the power supply control device can specifically be a computing device in a vehicle, or a software tool and / or hardware module in a computing device that can be used for power supply control. Optionally, the power supply control device can be a controller in a vehicle, such as an advanced driving assistance system (ADAS) and / or an autonomous driving system (ADS), or a mobile data center (MDC) (or autonomous driving domain controller), a domain controller (DC), an electronic control unit (ECU), etc., wherein the DC is such as a motion domain controller (MDC), a vehicle domain controller (VDC), etc. Exemplarily, the power supply control device can be the above-mentioned Figure 2 The controller 105 in the present application is used to execute the power supply control method in the embodiment of the present application, which can improve the efficiency of the dual DC-DC system.

[0110] Optionally, the power supply control device and power supply control method in the embodiments of this application can be applied to, but are not limited to, vehicle systems. The vehicle equipped with the vehicle system is an intelligent driving vehicle and can be replaced by a terminal device. The terminal device can be, but is not limited to, vehicles such as commercial vehicles, passenger cars, trains, etc., industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), robots, etc. The embodiments of this application do not specifically limit this.

[0111] In one implementation, the power supply control device can be a device capable of acquiring first information, for example, for... Figure 2 The controller 105 shown obtains the first information from the power supply control device. In another possible embodiment, the first information may also be obtained by another device and then sent to the power supply control device.

[0112] The first piece of information includes the load requirements of the first vehicle.

[0113] For example, the load demand of the first vehicle can be the total load demand of the dual DC-DC power supply system of the first vehicle, or the load demand of the first vehicle can be the total power output of the first DC-DC and the second DC-DC. For example, in Figure 2 In the dual DC-DC system shown, the output power of the first and second DC-DC converters is... Figure 2 If the electrical equipment 106 and the battery 104 in the first vehicle are powered, then the load requirements of the first vehicle include... Figure 2 The power demand of the electrical equipment 106 and the power demand of the storage battery 104.

[0114] For example, the load requirement of the first vehicle can be the average total output power of the first DC-DC converter and the second DC-DC converter within a first time period (e.g., 60 seconds).

[0115] Optionally, the first efficiency ranges of the two DC-DC converters correspond to different output powers, and the first voltage and the second voltage are different to control the priority output power of the first or second DC-DC converter. For example, the first efficiency range is a high-efficiency range, such as an efficiency range with an efficiency greater than 90%.

[0116] Optionally, the first information may also include any one or more of the following: the status of the first DC-DC converter, the status of the second DC-DC converter, the status of the first vehicle, the charging and discharging status of the battery, the temperature of the battery, and the battery capacity.

[0117] For example, the status of the first DC-DC includes status information such as whether the first DC-DC is faulty (e.g., the first DC-DC is short-circuited, the first DC-DC cannot work, etc.) and whether the rated output power of the first DC-DC has decreased.

[0118] For example, the status of the second DC-DC includes status information such as whether the second DC-DC is faulty (e.g., the second DC-DC is short-circuited, the second DC-DC cannot work, etc.) and whether the rated output power of the second DC-DC is attenuated.

[0119] For example, the state of the first vehicle may include one or more of the following: the driving state of the first vehicle, the driving mode of the first vehicle, the charging state of the first vehicle, and the intelligent charging scenario of the first vehicle. For example, the first vehicle may be in an economy driving mode, or the first vehicle may be in a charging and discharging state (e.g., AC / DC charging and discharging state).

[0120] For example, the charge / discharge state of a battery includes a charging state and a discharging state. The battery temperature (e.g., the average temperature of the battery in a short period of time) affects the battery's performance; for example, excessively low battery temperatures can affect the battery's discharge capacity. The battery capacity can also be referred to as the battery's remaining charge.

[0121] Optionally, the power supply control device can acquire characteristic information of the first DC-DC converter and the second DC-DC converter, such as the output power range corresponding to the first efficiency range of the first DC-DC converter and the output power range corresponding to the first efficiency range of the second DC-DC converter. For example, the first efficiency range is a high-efficiency range with an efficiency greater than 90%. If the output power of the first DC-DC converter or the second DC-DC converter is within or close to the output power range corresponding to the first efficiency range, then the efficiency of the first DC-DC converter or the second DC-DC converter is relatively high. For example, the first efficiency range of the second DC-DC converter is the same as the first efficiency range of the first DC-DC converter, such as a high-efficiency range with an efficiency greater than 90%. In this case, the power supply control device can determine the demand scenarios of the first DC-DC converter and the second DC-DC converter through the characteristic information of the first DC-DC converter and the second DC-DC converter, that is, determine whether the first DC-DC converter and the second DC-DC converter achieve high efficiency under light load conditions (low output power), medium load conditions (moderate output power), or heavy load conditions (high output power). For example, the high-efficiency range of the first DC-DC converter, with an efficiency greater than 90%, corresponds to an output power range of 700W~1500W (light load condition), while the high-efficiency range of the second DC-DC converter, with an efficiency greater than 90%, corresponds to an output power range of 2500W~3000W (heavy load condition). Therefore, to improve the efficiency of the dual DC-DC system, the first DC-DC converter should operate under light load conditions, i.e., an output power range of 700W~1500W or close to 700W~1500W, while the second DC-DC converter should operate under heavy load conditions, i.e., an output power range of 2500W~3000W or close to 2500W~3000W.

[0122] Optionally, the power supply control device may pre-acquire the characteristic information of the first DC-DC converter and the second DC-DC converter. Alternatively, the first information may include the characteristic information of the first DC-DC converter and the second DC-DC converter, and the power supply control device may acquire the characteristic information of the first DC-DC converter and the second DC-DC converter when acquiring the first information.

[0123] The method in the embodiments of this application is applied to Figure 3In the illustrated dual-DC-CDC system architecture, the system also includes an APS (Automatic Power Supply). When the APS is closed, the first and second DC-CDCs are connected in parallel to power the electrical equipment and / or battery. In this case, the output voltage difference between the first and second DC-CDCs can affect the priority output power of either the first or second DC-CDC. When the APS is open, the first and second DC-CDCs independently power the electrical equipment and / or battery. Optionally, the first information also includes the state of the APS, which may be either closed or open (e.g., abnormal or accidental disconnection).

[0124] It is understood that the first information may also include other information about the first vehicle. The above examples are merely illustrative and the scope of the embodiments in this application is not specifically limited.

[0125] In one possible implementation, step S401 specifically involves: after the first vehicle has been powered on for a first period of time, the power supply control device acquires the first information.

[0126] It is understandable that when the first vehicle is first powered on, the first DC-DC converter and the second DC-DC converter are turned on one after another, and the electrical equipment of the first vehicle also starts to work one after another. The load demand of the first vehicle gradually increases and tends to stabilize. The power supply control device can only obtain the first information after the first vehicle has been powered on for a first period of time (e.g., 60 seconds).

[0127] Optionally, during the first power-on period of the first vehicle, the first DC-DC converter and the second DC-DC converter are turned on sequentially at a second time interval. For example, the first DC-DC converter enters the power-on state earlier than the second DC-DC converter, and the power-on time of the first DC-DC converter and the power-on time of the second DC-DC converter are separated by the second time interval to avoid excessive instantaneous current in the circuit due to simultaneous power-on. The second time interval is shorter than the first time interval.

[0128] Step S402: Based on the first information, the power supply control device determines the target output voltages of the two DC-DC converters as the first voltage and the second voltage, respectively.

[0129] The first voltage and the second voltage are different.

[0130] In one exemplary scheme, the first voltage is greater than the second voltage. For example, the first voltage is the battery's replenishment voltage, and the second voltage is the larger of the first voltage minus the first voltage difference and the battery's minimum replenishment voltage. The battery's replenishment voltage is the voltage (or bus voltage) that the DC-DC converter needs to output, determined by the power supply control device based on the battery's state. The DC-DC converter with the first voltage output replenishes (or charges) the battery. The battery's minimum replenishment voltage is the minimum operating voltage of the dual DC-DC system. It can be understood that the power supply control device adjusts the DC-DC converter's output voltage to charge the battery based on its state; therefore, the minimum battery replenishment voltage is the minimum DC-DC converter output voltage. When the voltage value after subtracting the first voltage difference from the first voltage is greater than the battery's minimum replenishment voltage, the second voltage is equal to the first voltage minus the first voltage difference; when the voltage value after subtracting the first voltage difference from the first voltage is less than the battery's minimum replenishment voltage, the second voltage is equal to the battery's minimum replenishment voltage. Optionally, the battery's minimum replenishment voltage is a preset value.

[0131] Optionally, the first differential pressure is pre-calibrated, for example, obtained through prior testing. For example, multiple differential pressures are measured in advance under different load conditions, and the first differential pressure is one of the differential pressures corresponding to the load requirements of the first vehicle. That is, under different load conditions, the voltage difference between the first voltage and the second voltage set by the power supply control device may be different.

[0132] The power supply control device can determine, based on the first information, whether the current operating scenario is suitable for prioritizing the output power of the first or second DC-DC converter. This applies to a dual DC-DC system architecture where two DC-DC converters are connected in parallel to power electrical equipment and / or batteries, for example... Figure 1 The illustrated dual-DCDDC system architecture prioritizes power output from the DC-DC converter when a voltage difference exists between the two converters' output voltages. Therefore, when the first voltage is greater than the second voltage, the power supply control device sets the target output voltage of the DC-DC converter prioritizing power output as the first voltage, and the target output voltage of the other DC-DC converter as the second voltage, to ensure that the first and / or second DC-DC converters operate within their respective high-efficiency ranges. For example, if the first efficiency range is greater than 90%, the power supply control device determines that the first DC-DC converter should prioritize power output based on the load demand of the first vehicle in the first information, so that the output power of the first DC-DC converter is close to the output power range corresponding to its first efficiency range.

[0133] In one possible implementation, the power supply control device, based on first information, determines that, under a first condition, the target output voltage of the first DC-DC converter is a first voltage, and the target output voltage of the second DC-DC converter is a second voltage. The first voltage is greater than the second voltage, and the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter. It can be understood that, under the first condition, prioritizing power output by increasing the output voltage of the first DC-DC converter helps improve the efficiency of the dual DC-DC system. For example, if the power supply control device determines that the first DC-DC converter is more efficient under light load conditions because the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than that corresponding to the first efficiency range of the second DC-DC converter, and if the power supply control device determines, based on the first information, that the load demand of the first vehicle is relatively small, then the first DC-DC converter is selected to prioritize power output for the electrical equipment and / or battery. If the first DC-DC converter alone can meet the load demand of the first vehicle, only the first DC-DC converter outputs power, and the second DC-DC converter does not output power. In this case, the first DC-DC converter has higher efficiency, thus making the dual DC-DC system more efficient.

[0134] For example, the first condition includes one or more of the following: the load requirement of the first vehicle is less than a first power threshold, the second DC-DC converter is in a faulty state, and the first vehicle is in a low-power mode.

[0135] It is understandable that, since the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first high efficiency range of the second DC-DC converter, the first DC-DC converter can be considered to achieve high efficiency with lower output power compared to the second DC-DC converter. Therefore, when the load demand of the first vehicle is less than the first power threshold, that is, when the load demand of the first vehicle is low, it is appropriate for the first DC-DC converter to prioritize output power to meet the load demand, so that the output power of the first DC-DC converter is closer to or within the output power range corresponding to the first efficiency range of the first DC-DC converter, thereby improving the efficiency of the first DC-DC converter and thus improving the efficiency of the dual DC-DC converter system.

[0136] For example, the first power threshold is a preset threshold, which can be adjusted according to the actual situation.

[0137] For example, the first power threshold is less than or equal to the rated output power of the first DC-DC converter.

[0138] For example, the first power threshold is greater than the minimum output power of the output power range corresponding to the first efficiency interval of the first DC-DC converter. In this case, if the load demand of the first vehicle is less than the first power threshold, the load demand of the first vehicle may fall within the output power range corresponding to the first efficiency interval of the first DC-DC converter.

[0139] It is understandable that for a dual DC-DC system, if the second DC-DC fails, the output power of the first DC-DC can only meet the load requirements of the first vehicle. Therefore, the power supply control device determines the target output voltage of the first DC-DC as the first voltage to ensure the normal operation of the low-voltage power system of the first vehicle.

[0140] It is understandable that when the first vehicle is in a low-power mode, such as an economy driving mode, the power consumption of the first vehicle is lower, meaning the load demand of the first vehicle is smaller. Referring to the explanation that the load demand of the first vehicle is less than a first power threshold, similarly, the output voltage of the first DC-DC converter is set to a higher voltage to prioritize power output, improve the efficiency of the first DC-DC converter, and thus improve the efficiency of the dual DC-DC system. Optionally, the low-power mode may also include intelligent charging scenarios, AC or DC charging scenarios, etc.

[0141] In another possible implementation, the power supply control device, based on the first information, determines that, under the condition of satisfying the second condition, the target output voltage of the second DC-DC converter is a first voltage, and the target output voltage of the first DC-DC converter is a second voltage. The first voltage is greater than the second voltage, and the output power range corresponding to the first efficiency range of the first DC-DC converter is less than the output power range corresponding to the first efficiency range of the second DC-DC converter. It can be understood that the power supply control device's determination to prioritize output power by increasing the output voltage of the second DC-DC converter under the second condition helps improve the efficiency of the dual DC-DC system. For example, if the power supply control device determines that the second DC-DC converter is more efficient under heavy load conditions because the output power range corresponding to the first efficiency range of the first DC-DC converter is less than that corresponding to the first efficiency range of the second DC-DC converter, and if the power supply control device determines, based on the first information, that the load demand of the first vehicle is large, then it selects the second DC-DC converter to prioritize output power to supply power to the electrical equipment and / or the battery, thereby increasing the efficiency of the second DC-DC converter during operation and thus improving the efficiency of the dual DC-DC system.

[0142] For example, the second condition includes one or more of the following: the first DC-DC converter is in a faulty state; the load demand of the first vehicle is greater than the first power threshold; the battery capacity is less than the first capacity threshold and is in a discharging state; the battery temperature is less than the first temperature threshold; and the output power capability of the first DC-DC converter and / or the second DC-DC converter is attenuated.

[0143] Optionally, the target output voltage of the second DC-DC converter being the first voltage can include at least the following two cases: In scenario one, if the second DC-DC converter can meet the load requirements of the first vehicle, since the target output voltage of the second DC-DC converter is higher than that of the first DC-DC converter, only the output power of the second DC-DC converter supplies power to the electrical equipment and / or the battery, and the first DC-DC converter does not output power.

[0144] For example, in case one, the second condition includes any one or more of the following: the first DC-DC converter is in a fault state, the load demand of the first vehicle is greater than the first power threshold, and the battery capacity is less than the first capacity threshold and is in a discharging state.

[0145] When the first DC-DC converter is in a faulty state, only the second DC-DC converter can work normally. In order to ensure the normal operation of the power supply system of the first vehicle, the output power of the second DC-DC converter is prioritized to power the electrical equipment and / or the battery. Therefore, the target output voltage of the second DC-DC converter is determined to be the higher first voltage.

[0146] Optionally, the first power threshold is less than the rated output power of the second DC-DC converter, meaning the load demand of the first vehicle is greater than the first power threshold but less than the rated output power of the second DC-DC converter. It can be understood that when the load demand of the first vehicle is less than the rated output power of the second DC-DC converter, the target output voltage of the second DC-DC converter is higher than the target output voltage of the first DC-DC converter, thus enabling the second DC-DC converter to prioritize power output and only output power from the second DC-DC converter.

[0147] Alternatively, the first power threshold may be greater than the maximum output power of the output power range corresponding to the first efficiency range of the first DC-DC, and / or the first power threshold may be less than the minimum output power of the output power range corresponding to the first efficiency range of the second DC-DC. For example, if the load demand of the first vehicle is located within the output power range corresponding to the first efficiency range of the second DC-DC, prioritizing the output power of the second DC-DC can enable the second DC-DC to operate within its first efficiency range. If the first efficiency range is a high-efficiency range (efficiency greater than 90%), then the efficiency of the second DC-DC is higher, thereby making the efficiency of the dual DC-DC system higher.

[0148] For example, typically, the output power of the first DC-DC converter and / or the second DC-DC converter can simultaneously power both the electrical equipment and the battery. Therefore, if the battery capacity is less than a first capacity threshold and is in a discharging state, it can be understood that the power output of the current DC-DC converter is insufficient to meet the power demand of the electrical equipment, so the battery needs to discharge to power the electrical equipment. One possible explanation is that in this case, the power demand of the electrical equipment suddenly increases, i.e., the load demand of the first vehicle suddenly increases. Therefore, the target output voltage of the second DC-DC converter is determined to be a higher first voltage, so that the second DC-DC converter prioritizes output power.

[0149] For example, when the first DC-DC converter prioritizes output power to supply power to the electrical equipment (when the target output voltage of the first DC-DC converter is a higher first voltage), if the battery capacity is less than the first capacity threshold and is in a discharging state, it indicates that the power output of the first DC-DC converter cannot meet the power demand of the electrical equipment. Therefore, the power supply control device adjusts the target output voltage of the two DC-DC converters and determines that the target output voltage of the second DC-DC converter is a higher first voltage so as to prioritize output power.

[0150] In scenario two, if the second DC-DC converter cannot meet the load demand of the first vehicle, even if the power supply control device determines that the target output voltage of the second DC-DC converter is higher than the target output voltage of the first DC-DC converter, the second DC-DC converter cannot continuously maintain the output of the first voltage because it cannot meet the load demand of the first vehicle. The actual output voltage of the second DC-DC converter will gradually decrease until it is close to or equal to the second voltage. At this time, the first DC-DC converter also outputs power to supply power to the electrical equipment and / or the battery, and the two DC-DC converters share the load demand of the first vehicle.

[0151] For scenario two, for example, the second condition may include any one or more of the following: the load demand of the first vehicle is greater than the first power threshold, the battery capacity is less than the first capacity threshold and is in a discharging state, the battery temperature is less than the first temperature threshold, and the output power capability of the first DC-DC and / or the second DC-DC is attenuated.

[0152] Optionally, if the first power threshold is greater than the rated output power of the second DC-DC converter, then the output power of the second DC-DC converter alone cannot meet the load requirements of the first vehicle. Therefore, both the first and second DC-DC converters need to output power to supply the electrical equipment. For example, if the target output voltage of the second DC-DC converter is higher than the target output voltage of the first DC-DC converter, the second DC-DC converter will first output power to supply the electrical equipment. Since the second DC-DC converter cannot meet the power requirements of the electrical equipment, the actual output voltage of the second DC-DC converter will gradually decrease and gradually approach the output voltage of the first DC-DC converter (such as approaching the second voltage). Then, the first DC-DC converter will then gradually output power to supply the electrical equipment.

[0153] For example, if the battery capacity is less than the first capacity threshold and is in a discharging state, one possible explanation is that the target output voltage of the second DC-DC converter was originally higher than the target output voltage of the first DC-DC converter, and only the second DC-DC converter output power to power the electrical equipment. However, the power demand of the electrical equipment suddenly increases, and the second DC-DC converter alone cannot meet the power demand of the electrical equipment. Therefore, the battery discharges to power the electrical equipment in the short term. Subsequently, the actual output voltage of the second DC-DC converter gradually decreases until it approaches or equals the actual output voltage of the first DC-DC converter, and the first DC-DC converter begins to output power to power the electrical equipment.

[0154] For example, when the battery temperature is below a first temperature threshold, the battery's discharge capacity decreases. If the power demand of electrical equipment suddenly increases, the battery may not be able to discharge in time to supply power, affecting the stability of the power supply system. Therefore, the second DC-DC converter can be prioritized for power output, or both DC-DC converters can output power, to ensure the power consumption of electrical equipment and the stability of the power supply system.

[0155] For example, the output power of the first DC-DC and / or the second DC-DC may be attenuated. In this case, the output power of the first DC-DC and / or the second DC-DC alone may not be able to meet the power demand of the electrical equipment. Therefore, both DC-DCs can output power to supply power to the electrical equipment.

[0156] In one possible implementation, the method of this application embodiment is applied to Figure 3 The dual DC-DC system architecture shown also includes an APS. When the APS is closed, the first DC-DC and the second DC-DC are connected in parallel to power the electrical equipment and / or the battery.

[0157] Optionally, step S402 specifically involves: when the APS is in the closed state, the power supply control device determines, based on the first information, the target output voltages of the two DC-DC converters as the first voltage and the second voltage, respectively.

[0158] It is understandable that when the first DC-DC converter and the second DC-DC converter are connected in parallel, the power supply control device can control the voltage difference between the output voltages of the first DC-DC converter and the second DC-DC converter, so that the DC-DC converter with the higher output voltage will give priority to output power. This can be done by controlling the first DC-DC converter or the second DC-DC converter to give priority to output power to electrical equipment and / or batteries according to different DC-DC demand scenarios.

[0159] Optionally, the first information may also include the status of the APS, which can be either closed or open. The open state can be further categorized as either an erroneous APS opening or an abnormal APS opening. In the case of an erroneous APS opening, for example, due to an excessive voltage difference across the APS terminals, the APS itself functions normally, and the power supply control device can control the APS to close under conditions that meet the APS closing requirements. However, in the case of an abnormal APS opening, such as an APS malfunction, the APS cannot be controlled to close.

[0160] Optionally, to prevent the APS from erroneously disconnecting, the power supply control method may further include: when the APS is closed, the power supply control device detects a first current flowing through the APS; if the first current is greater than a first current threshold, then the voltage difference across the APS is controlled to be less than the first voltage threshold. It is understood that when the power supply control device detects that the current flowing through the APS is too large, or detects that the voltage difference across the APS is too large, the APS is at risk of erroneously disconnecting. To avoid erroneous disconnection of the APS, the voltage difference across the APS can be reduced until it is less than the first voltage threshold. For example, the power supply control device can lower the voltage at the higher of the voltages across the APS. For example, in... Figure 3 In the dual DC-DC system shown, when the output voltage of the first DC-DC is higher than that of the second DC-DC, the voltage difference across the APS can be reduced by lowering the output voltage of the first DC-DC.

[0161] Optionally, the first current threshold is a preset threshold that can be adjusted according to the actual scenario and requirements.

[0162] Optionally, the method may further include: when the APS is in an off state (including APS accidental disconnection or APS abnormal disconnection), the power supply control device determines that the target output voltage of both DC-DC converters is a first voltage (e.g., the battery charging voltage). It can be understood that when the APS is off, the circuits containing the first and second DC-DC converters are two independent circuit branches. Therefore, the power supply control device determines the target output voltage of both the first and second DC-DC converters as the first voltage to ensure that both DC-DC converters can supply power to the electrical equipment and the battery.

[0163] Optionally, when the APS is in a falsely disconnected state, the method further includes: the power supply control device detecting a second voltage difference across the APS; if the second voltage difference is less than a first voltage difference threshold, then controlling the APS to close. It is understood that when the APS is in a falsely disconnected state and its function is normal, the power supply control device can control the APS to close if it detects that the APS meets the closing conditions, for example, if the voltage difference across the APS is small (less than the first voltage difference threshold). Optionally, the power supply control device can also control the APS to close if it detects the current flowing through the APS and the current flowing through the APS is less than a second current threshold.

[0164] Optionally, the first differential pressure threshold is a preset threshold that can be adjusted according to the actual scenario and requirements.

[0165] In one possible implementation, if the power supply control device has not acquired the first information, for example, during the first period after the first DC-DC converter is powered on, the power supply control device determines the target output voltage of the first DC-DC converter as the first voltage after the first DC-DC converter is powered on, and determines the target output voltage of the second DC-DC converter as the second voltage after the second DC-DC converter is powered on. It can be understood that when the first vehicle is just powered on, the power supply control device has not yet acquired the first information and cannot determine the appropriate DC-DC converter priority output power based on the first information. Therefore, the voltage of the DC-DC converter that is powered on first can be set as the first voltage to prioritize output power and ensure normal power supply to the electrical equipment of the first vehicle.

[0166] Optionally, when the first vehicle is powered on, the electrical equipment starts working one after another. The load demand of the first vehicle is relatively small. The power supply control device can set the voltage of the DC-DC converter (e.g., the first DC-DC converter) that achieves high efficiency under light load conditions to a higher first voltage to prioritize power output and improve the efficiency of the dual DC-DC system.

[0167] Optionally, in any of the above possible implementations, the DC-DC converter with a target output voltage of the second voltage is in a hot standby state, where the hot standby state indicates that the DC-DC converter is in an unloaded state with output voltage but no output power. Although the DC-DC converter in the hot standby state does not output power, it can quickly start to output power when power is needed (e.g., when the other DC-DC converter is insufficient or has failed), to ensure the stability of the first vehicle's power supply system. For example, when the first vehicle is in driving conditions and not in a low-power mode (e.g., economy driving mode), the DC-DC converter that is not outputting power can be set to a hot standby state.

[0168] Optionally, when the first vehicle is in a low-power mode, such as in an intelligent charging scenario or an AC or DC charging / discharging scenario, the power supply control device can set the DC-DC converter with a target output voltage of the second voltage (the DC-DC converter that is not outputting power) to a cold backup state. The cold backup state indicates that the DC-DC converter is in a standby state with no output voltage and current. Alternatively, it can shut down the flyback auxiliary power supply of the DC-DC converter with a target output voltage of the second voltage (the DC-DC converter that is not outputting power). The flyback auxiliary power supply is the auxiliary power supply inside the DC-DC converter, thereby reducing power consumption. Optionally, the power supply control device can also shut down the DC-DC converter that is not outputting power, or put it into a sleep state.

[0169] In one possible implementation, the power supply control method further includes: when the target output voltage of the second DC-DC is determined to be the second voltage, obtaining a third duration during which the second DC-DC continuously does not output power; and when the third duration is greater than a first duration threshold, determining the target output voltage of the second DC-DC to be the first voltage. It can be understood that when the target output voltage of the second DC-DC is the second voltage and the target output voltage of the first DC-DC is the first voltage, the second DC-DC does not output power. To avoid the second DC-DC's lifespan decreasing due to prolonged periods without power output, if the power supply control device obtains a long duration of the second DC-DC in a non-power-output state, the target output voltage of the second DC-DC can be determined to be the first voltage, allowing the second DC-DC to output power. After the second DC-DC outputs power for a period of time (after the first output of power), the lifespan degradation problem of the second DC-DC can be effectively alleviated.

[0170] Optionally, after mitigating the lifespan degradation issue of the second DC-DC converter, the power supply control device can continue to repeat steps S401 and S402 with the goal of improving the efficiency of the dual DC-DC system. For example, the power supply control device continues to acquire the first charge output by the second DC-DC converter in a non-no-load state; if the first charge is greater than a second charge threshold, it acquires first information; and then, based on the first information, it determines the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively. For details regarding acquiring the first information and determining the output voltages of the two DC-DC converters based on the first information, please refer to the above description, which will not be repeated here.

[0171] The method provided in the embodiments of this application can effectively improve the efficiency of a dual DC-DC system and effectively alleviate the problem of lifespan degradation caused by prolonged periods of no power output from the DC-DC converter. Furthermore, in certain scenarios, it can also reduce the power consumption of the dual DC-DC system.

[0172] In another possible implementation, considering that in practical applications, the load demand of the first vehicle is low in most scenarios, and the output power range corresponding to the first efficiency range (e.g., high efficiency range) of the first DC-DC is less than the output power range corresponding to the first efficiency range (e.g., high efficiency range) of the second DC-DC, for example, when the first DC-DC achieves high efficiency under light load, the power supply control device can always set the target output voltage of the first DC-DC to a higher first voltage, so that the first DC-DC outputs power first. This can achieve high efficiency of the dual DC-DC system in most scenarios, and simplify the operation of the power supply control device, avoiding frequent adjustment of the target output voltage of the two DC-DCs.

[0173] The methods of the embodiments of this application have been described in detail above. The following provides an apparatus for implementing any one of the methods in the embodiments of this application. For example, an apparatus is provided that includes a unit (or means) for implementing the steps performed by the device in any of the above methods.

[0174] Please see Figure 5 , Figure 5 This is a schematic diagram of a power supply control device provided in an embodiment of this application.

[0175] like Figure 5 As shown, the power supply control device 50 may include an acquisition unit 501 and a processing unit 502. The acquisition unit 501 and the processing unit 502 may be software, hardware, or a combination of software and hardware.

[0176] The acquisition unit 501 can implement sending and / or receiving functions, and can also be described as a transceiver unit. The acquisition unit 501 can also be a unit integrating an acquisition unit and a sending unit, wherein the acquisition unit is used to implement the receiving function, and the sending unit is used to implement the sending function. Optionally, the acquisition unit 501 can be used to receive information sent by other devices, and can also be used to send information to other devices.

[0177] In one possible design, the power supply control device 50 may correspond to the above. Figure 4 The power supply control device in the illustrated method embodiment, such as power supply control device 50, can be an electronic device or a chip within an electronic device. The power supply control device 50 may include components for performing the above-described... Figure 4 The unit in the method embodiment shown is the one whose operation is performed by the power supply control device, and each unit in the power supply control device 50 is respectively for implementing the above-mentioned... Figure 4 The operation performed by the power supply control device in the illustrated method embodiment is described below: The acquisition unit is used to acquire first information, which includes the load requirements of the first vehicle.

[0178] The processing unit is used to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, wherein the first voltage and the second voltage are different.

[0179] In one possible implementation, the processing unit is specifically configured to determine, based on first information, that under a first condition, the target output voltage of the first DC-DC converter is a first voltage, and the target output voltage of the second DC-DC converter is a second voltage. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0180] In one possible implementation, the processing unit is specifically configured to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively, including: based on the first information, determining that, under a second condition, the target output voltage of the second DC-DC converter is the first voltage, and the target output voltage of the first DC-DC converter is the second voltage. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0181] In one possible implementation, the processing unit is specifically configured to, when the APS is in the closed state, determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively.

[0182] In one possible implementation, the processing unit is specifically configured to detect a first current flowing through the APS when the APS is closed; if the first current is greater than a first current threshold, control the voltage difference across the APS to be less than a first voltage threshold.

[0183] In one possible implementation, the processing unit is specifically configured to determine, when the APS is in the off state, that the target output voltages of both DC-DC converters are the first voltage.

[0184] In one possible implementation, the processing unit is specifically configured to detect a second voltage difference across the APS in the event of an APS erroneously disconnecting, and if the second voltage difference is less than a first voltage difference threshold, control the APS to close.

[0185] In one possible implementation, the processing unit is specifically configured to, within a first time period, determine the target output voltage of the first DC-DC converter as a first voltage after the first DC-DC converter is powered on; and determine the target output voltage of the second DC-DC converter as a second voltage after the second DC-DC converter is powered on. Wherein, the output power range corresponding to the first efficiency range of the first DC-DC converter is smaller than the output power range corresponding to the first efficiency range of the second DC-DC converter, and the first voltage is greater than the second voltage.

[0186] In one possible implementation, the acquisition unit is specifically used to acquire a third duration of continuous no power output by the second DC-DC when the target output voltage of the second DC-DC is determined to be a second voltage.

[0187] The processing unit is specifically used to determine the target output voltage of the second DC-DC converter as the first voltage when the third time is greater than the first time duration threshold.

[0188] The acquisition unit can also be used to acquire the first charge output by the second DC-DC converter when it is in a non-no-load state.

[0189] The acquisition unit can also be used to acquire first information when the first power level is greater than the second power level threshold. The processing unit can also be used to determine, based on the first information, the target output voltages of the two DC-DC converters as a first voltage and a second voltage, respectively.

[0190] The steps performed by the acquisition unit 501 and processing unit 502 described in this design can be referred to the steps corresponding to the above. Figure 4 The implementation method corresponding to the power supply control device in the illustrated method embodiment.

[0191] Regarding the technical effects brought about by the implementation methods performed by the acquisition unit 501 and processing unit 502 described in this design, please refer to the corresponding methods described above. Figure 4 The technical effects of the illustrated method embodiments are described below.

[0192] According to the embodiments of this application, Figure 5 The various units in the illustrated device can be individually or entirely combined into one or more other units, or some of the units can be further divided into multiple functionally smaller units. This achieves the same operation without affecting the technical effects of the embodiments of this application. The above-mentioned units are based on logical function division. In practical applications, the function of one unit can also be implemented by multiple units, or the function of multiple units can be implemented by one unit. In other embodiments of this application, the electronic device may also include other units. In practical applications, these functions can also be implemented with the assistance of other units, and can be implemented collaboratively by multiple units.

[0193] It should be noted that the implementation of each unit can also refer to the above. Figure 4 The corresponding description of the method embodiments shown.

[0194] For cases where the aforementioned power supply control device 50 can be an electronic device, please refer to [reference needed]. Figure 6 The diagram shows the structure of the electronic device.

[0195] It should be understood that Figure 6 The electronic device 60 shown is merely an example; the electronic device in this application embodiment may also include other components, or include components related to... Figure 6 Components with similar functions, or not necessarily including Figure 6 All components.

[0196] Electronic device 60 includes a transceiver interface 601 and at least one processor 602.

[0197] The electronic device 60 can correspond to a power supply control device. The transceiver interface 601 is used for transmitting and receiving signals, and at least one processor 602 executes program instructions, causing the electronic device 60 to implement the corresponding process of the method executed by the corresponding device in the above method embodiments.

[0198] In one possible design, the electronic device 60 may correspond to the above. Figure 4 The power supply control device in the illustrated method embodiment, such as the electronic device 60, can be a power supply control device or a chip within the power supply control device. The electronic device 60 may include components for performing the operations executed by the power supply control device in the above method embodiment, and each component in the electronic device 60 is specifically designed to implement the operations executed by the power supply control device in the above method embodiment. Specifically, it can be as follows: The transceiver interface 601 is used to obtain first information, which includes the load requirements of the first vehicle.

[0199] Processor 602 is used to determine, based on first information, the target output voltages of two DC-DC converters as a first voltage and a second voltage, wherein the first voltage and the second voltage are different.

[0200] Regarding the transceiver interface 601 and at least one processor 602 described in this design, the steps they perform can be referred to the corresponding steps described above. Figure 4 The implementation method corresponding to the power supply control device in the illustrated method embodiment.

[0201] Regarding the technical effects of the transceiver interface 601 and the implementation methods performed by at least one processor 602 described in this design, please refer to the corresponding descriptions above. Figure 4 The technical effects of the illustrated method embodiments are described below.

[0202] For cases where the aforementioned power supply control device 50 can be a chip or a chip system, please refer to [reference needed]. Figure 7 The diagram shows the structure of the chip.

[0203] like Figure 7 As shown, chip 70 includes a processor 701 and an interface 702. The number of processors 701 can be one or more, and the number of interfaces 702 can be multiple. It should be noted that the functions of each processor 701 and interface 702 can be implemented through hardware design, software design, or a combination of both; no restrictions are placed here.

[0204] Optionally, chip 70 may also include memory 703 for storing necessary program instructions and data.

[0205] In this application, processor 701 can be used to call the implementation program of the power supply control method provided in one or more embodiments of this application in the power supply control device from memory 703, and execute the instructions included in the program. Interface 702 can be used to output the execution result of processor 701. In this application, interface 702 can be specifically used to output various messages or information of processor 701.

[0206] The power supply control method provided in one or more embodiments of this application can be referred to the foregoing. Figure 4 The various embodiments shown are not described in detail here.

[0207] The processor in this application embodiment can be a central processing unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0208] The memory in this application embodiment is used to provide storage space, in which data such as operating system and computer programs can be stored. The memory includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM).

[0209] According to the method provided in the embodiments of this application, the embodiments of this application also provide a computer-readable storage medium storing a computer program. When the computer program is run on one or more processors, it can implement the above-mentioned... Figure 4 The method shown.

[0210] According to the method provided in the embodiments of this application, the embodiments of this application also provide a computer program product, which includes a computer program. When the computer program runs on a processor, it can achieve the above-mentioned... Figure 4 The method shown.

[0211] This application provides a power supply control system, which includes a power supply control device and a power supply circuit. The power supply control device is used to perform the above-described... Figure 4 The method shown.

[0212] This application embodiment also provides a terminal, which includes at least one power supply control device 50, or electronic device 60, or chip 70.

[0213] Optionally, the terminal can be a means of transportation in a broad sense, such as a vehicle, truck, aircraft, drone, slow transport vehicle, spacecraft, or ship, etc., for any possible scenario. This application embodiment does not limit this.

[0214] Optionally, the terminal is used to implement the above. Figure 4 The implementation method corresponding to the power supply control device in the illustrated method embodiment.

[0215] This application also provides a processing apparatus, including a processor and an interface; the processor is used to execute the method in any of the above method embodiments.

[0216] It should be understood that the above-described processing device can be a chip. The units in the various device embodiments and the electronic devices in the method embodiments correspond completely, with corresponding modules or units executing corresponding steps. For example, the communication unit (transceiver) executes the receiving or sending steps in the method embodiments, while other steps besides sending and receiving can be executed by the processing unit (processor). The specific functions of each unit can be found in the corresponding method embodiments. There can be one or more processors.

[0217] It is understood that in the embodiments of this application, the electronic device may perform some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the steps may be performed in different orders as presented in the embodiments of this application, and it is not necessarily necessary to perform all the operations in the embodiments of this application.

[0218] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0219] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0220] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0221] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the contributing part, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0222] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A power supply control method characterized by, A power supply circuit applied to a first vehicle, the power supply circuit comprising a first DCDC and a second DCDC, the method comprising: obtaining first information, the first information comprising load demand of the first vehicle; determining target output voltages of the two DCDCs as a first voltage and a second voltage respectively based on the first information, the first voltage and the second voltage being different.

2. The method of claim 1, wherein, The first efficiency interval of the two DCDCs corresponds to different output powers, and the first voltage and the second voltage are different for controlling the first DCDC or the second DCDC to preferentially output power.

3. The method according to claim 1 or 2, characterized in that, The power supply circuit further comprises a battery, and the first information further comprises any one or more of the state of the first DCDC, the state of the second DCDC, the state of the first vehicle, the charge and discharge state of the battery, the temperature of the battery, and the battery capacity of the battery.

4. The method according to any one of claims 1 to 3, characterized in that, The determining target output voltages of the two DCDCs as a first voltage and a second voltage respectively based on the first information comprises: determining that the target output voltage of the first DCDC is the first voltage and the target output voltage of the second DCDC is the second voltage based on the first information under the condition that a first condition is met; The output power range corresponding to the first efficiency interval of the first DCDC is smaller than the output power range corresponding to the first efficiency interval of the second DCDC, and the first voltage is greater than the second voltage.

5. The method of claim 4, wherein, The first condition comprises one or more of: The load demand of the first vehicle is less than a first power threshold; The second DCDC is in a fault state; The first vehicle is in a low power consumption mode.

6. The method according to any one of claims 1 to 3, characterized in that, The determining target output voltages of the two DCDCs as a first voltage and a second voltage respectively based on the first information comprises: determining that the target output voltage of the second DCDC is the first voltage and the target output voltage of the first DCDC is the second voltage based on the first information under the condition that a second condition is met; The output power range corresponding to the first efficiency interval of the first DCDC is smaller than the output power range corresponding to the first efficiency interval of the second DCDC, and the first voltage is greater than the second voltage.

7. The method of claim 6, wherein, The second condition comprises one or more of: The first DCDC is in a fault state; The load demand of the first vehicle is greater than the first power threshold; The battery capacity of the battery is less than a first capacity threshold and is in a discharge state; The temperature of the battery is less than a first temperature threshold; The first DCDC and / or the second DCDC output power has a decay condition.

8. The method according to any one of claims 1 to 7, characterized in that, The first voltage is the battery compensation voltage, and the second voltage is the greater voltage value between the voltage obtained by subtracting a first voltage difference from the first voltage and the minimum battery compensation voltage of the battery.

9. The method according to any one of claims 1 to 8, characterized in that, The power supply circuit further comprises an automatic protection switch APS, and when the APS is in a closed state, the first DCDC and the second DCDC are connected in parallel; and the first information further comprises the state of the APS.

10. The method of claim 9, wherein, The step of determining the target output voltages of the two DC-DC converters, namely the first voltage and the second voltage, based on the first information, includes: With the APS closed, based on the first information, the target output voltages of the two DC-DC converters are determined to be the first voltage and the second voltage, respectively.

11. The method according to claim 9 or 10, characterized in that, The method further includes: When the APS is closed, a first current flowing through the APS is detected; If the first current is greater than the first current threshold, the voltage difference across the APS is controlled to be less than the first voltage threshold.

12. The method according to any one of claims 9-11, characterized in that, The method further includes: When the APS is in the off state, the target output voltage of both DC-DC converters is determined to be the first voltage.

13. The method of claim 12, wherein, The disconnection status of the APS includes abnormal disconnection or accidental disconnection of the APS, and the method further includes: In the event of an erroneous disconnection of the APS, the second voltage difference across the APS is detected. If the second voltage difference is less than the first voltage difference threshold, then the APS is controlled to close.

14. The method according to any one of claims 1 to 13, characterized in that, The acquisition of the first information includes: The first information is acquired after the first vehicle has been powered on for a first period of time; Within the first duration, the first DC-DC converter enters the power-on state earlier than the second DC-DC converter enters the power-on state, and the power-on time of the first DC-DC converter and the power-on time of the second DC-DC converter are separated by a second duration, which is shorter than the first duration.

15. The method of claim 14, wherein, The method further includes: Within the first time period, after the first DC-DC converter is powered on, the target output voltage of the first DC-DC converter is determined to be the first voltage; After the second DC-DC converter is powered on, the target output voltage of the second DC-DC converter is determined to be the second voltage.

16. The method according to any one of claims 1 to 15, characterized in that, The DC-DC converter with the target output voltage of the second voltage is in a hot standby state, wherein the hot standby state means that the DC-DC converter is in an unloaded state with output voltage but no output power.

17. The method according to any one of claims 1 to 15, characterized in that, The DC-DC converter with the target output voltage of the second voltage is in a cold backup state, or the flyback auxiliary source of the DC-DC converter with the target output voltage of the second voltage is turned off; The cold backup state indicates that the DC-DC converter is in a standby state with no output voltage and current, and the flyback auxiliary power source is the auxiliary power supply inside the DC-DC converter.

18. The method according to any one of claims 1 to 17, characterized in that, The method further includes: If the target output voltage of the second DC-DC is determined to be the second voltage, then the third duration during which the second DC-DC continuously does not output power is obtained; If the third time is greater than the first duration threshold, the target output voltage of the second DC-DC converter is determined to be the first voltage; Obtain the first charge output by the second DC-DC converter when it is in a non-idle state; If the first power level is greater than the second power level threshold, obtain the first information; Based on the first information, the target output voltages of the two DC-DC converters are determined to be the first voltage and the second voltage, respectively.

19. A power supply control device characterized by comprising: Includes units for performing the method as described in any one of claims 1-18.

20. A power supply control device characterized by comprising: Includes a processor for performing the method as described in any one of claims 1-18.

21. A chip, characterized by It includes logic circuits and interfaces, wherein the logic circuits and the interfaces are coupled; The interface is configured to input and / or output information, and the logic circuit is configured to perform the method of any one of claims 1-18.

22. A power supply control system characterized by comprising: The power supply control system comprises a power supply control device and a power supply circuit, the power supply circuit comprising a first DCDC and a second DCDC; wherein the power supply control device is configured to perform the method of any one of claims 1-18 to enable the first DCDC and / or the second DCDC to preferentially output power.

23. A terminal, characterized by The power supply control device of claim 19 or 20, or the chip of claim 21, or the power supply control system of claim 22.

24. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, the computer program being configured to perform the method of any one of claims 1-18 when executed.

25. A computer program product, characterised in that, The computer program product comprises a computer program, the computer program being configured to perform the method of any one of claims 1-18 when executed.

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