Power control method

Abstract

The invention provides a power control method, and belongs to the technical field of vehicle control, and the power control method comprises the steps: collecting vehicle operation parameters; the vehicle operation parameters at least comprise one of power parameters, vehicle working conditions, navigation information and historical working conditions; determining a power control strategy through the multi-stage judgment condition by using the vehicle operation parameters; the multi-stage judgment condition at least comprises one of a power early warning condition, an energy storage early warning condition and a battery energy saving condition; the power control strategy at least comprises one of target voltage control, charging power control and electric appliance use limitation; and controlling the power according to the power control strategy. According to the method, the power control strategy is confirmed by using the multi-stage judgment condition, the target voltage is controlled, the charging power is controlled, the use of the electric appliances is limited, power management is performed on the low-voltage system, the peak power load is reduced, and the safety and reliability of the system are improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a power control method. Background Technology

[0002] New energy intelligent vehicles are gradually becoming mainstream innovative products in the market. The types and number of electrical appliances on vehicles are increasing, and the demand for low-voltage power is growing. When adding electrical appliances to newly developed models or existing models, it is necessary to re-match the low-voltage power, reselect the parameters of equipment such as DC-DC power and fuses, change the surrounding environmental components, increase costs and matching cycles, and reduce product standardization, which is not conducive to rapid product development and iteration. In addition, automobiles are used in a wide range of environments, including high and low temperatures. Refined protection of low-voltage batteries can extend battery life and reduce energy consumption, avoiding continuous damage to the battery caused by constant charging. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art and proposes a power control method for low-voltage electricity.

[0004] In a first aspect, embodiments of the present invention provide a power control method, comprising: collecting vehicle operating parameters; the vehicle operating parameters including at least one of power parameters, vehicle operating conditions, navigation information, and historical operating conditions; using the vehicle operating parameters to determine a power control strategy through multi-level judgment conditions; the multi-level judgment conditions including at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy including at least one of controlling target voltage, controlling charging power, and limiting the use of electrical appliances; and controlling power according to the power control strategy.

[0005] According to an embodiment of the present invention, vehicle operating parameters are collected, including: using sensors to collect power parameters and vehicle operating conditions; the power parameters include at least one of the following: real-time power of DC-DC converter, power of high-power electrical appliances, and power of low-voltage battery; the high-power electrical appliances include at least one of the following: low-pressure air PTC, seat heater, window heater, air conditioning blower, air compressor, cooling fan, windshield wipers, battery, headlights, and vehicle audio system; the vehicle operating conditions include at least one of the following: vehicle temperature and vehicle operating time; and navigation information and historical operating conditions are collected from a database.

[0006] According to an embodiment of the present invention, a power control strategy is determined using vehicle operating parameters and through multi-level judgment conditions, including: determining whether the vehicle operating parameters meet power warning conditions; the power warning condition is that the warning power is greater than a first preset threshold; the warning power is the real-time power of DC-DC converter or the sum of the real-time power of DC-DC converter and the predicted power; the predicted power is obtained by predicting through navigation information and historical operating conditions; if the power warning condition is met, then it is determined whether the energy storage warning condition is met; if so, then the use of electrical appliances is restricted according to the warning power and the safe power; if not, then a pre-control voltage is calculated based on the remaining battery charge, battery current, real-time voltage, and reserve power to control the target voltage; the energy storage warning condition is that the remaining battery charge is less than a second preset threshold or the low-voltage system voltage is less than a third preset threshold; if the power warning condition is not met, then it is determined whether the battery energy-saving condition is met; if so, then the target voltage is controlled based on the remaining battery charge, battery current, and voltage adjustment based on current; if not, then the target voltage and charging power are controlled according to the battery usage.

[0007] According to an embodiment of the present invention, restricting the use of electrical appliances based on the warning power and the safe power includes: determining whether the degradeable power is greater than the difference between the warning power and the safe power; if so, restricting or disabling a first degradeable electrical appliance based on the power parameters; the first degradeable electrical appliance includes at least one of a low-pressure air PTC, a car audio system, and a seat heater; if not, restricting or disabling a second degradeable electrical appliance; the second degradeable electrical appliance includes at least one of a low-pressure air PTC, a seat heater, a window heater, an air conditioning blower, a cooling fan, a windshield wiper, a headlight, and a car audio system.

[0008] According to an embodiment of the present invention, controlling a target voltage based on the remaining battery capacity, battery current, and current-based voltage adjustment includes: determining whether the remaining battery capacity is within a first preset range; if so, calculating the current-based voltage adjustment based on the current at the current moment, the battery voltage at zero moment, and the battery voltage and current at a preset moment; querying a pre-controlled voltage based on the remaining battery capacity; summing the current-based voltage adjustment and the pre-controlled voltage to obtain the target voltage; if not, querying the pre-controlled voltage based on the remaining battery capacity to obtain the target voltage.

[0009] According to an embodiment of the present invention, controlling the target voltage and charging power based on battery usage includes: determining whether planned power consumption conditions are met; the planned power consumption conditions are that the expected driving time is greater than a fourth preset threshold, or the expected battery temperature is greater than a fifth preset threshold, or the remaining battery charge is greater than a sixth preset threshold; if so, then using vehicle operating conditions, navigation information, and historical operating conditions, a power prediction planning strategy is obtained for use as a power control strategy; the prediction planning strategy is the control of charging power and the restriction of electrical appliance usage during each period of vehicle operation; if not, then the target voltage is compensated based on the battery temperature.

[0010] According to an embodiment of the present invention, a power prediction planning strategy is obtained using vehicle operating conditions, navigation information, and historical operating conditions, including: obtaining prediction parameters based on vehicle operating conditions, navigation information, and historical operating conditions; the prediction parameters include at least the expected cold-start usage time, the expected warm-start usage time, the expected total driving time, and the expected electrical appliance usage information; determining a first time period and a second time period using the expected cold-start usage time, the expected warm-start usage time, and the expected total driving time to determine the prediction planning strategy; wherein, the prediction planning strategy is as follows: during the first time period, limiting the battery charging power and operating short-term high-power devices; the short-term high-power devices are determined by the expected electrical appliance usage information; during the second time period, increasing the battery charging power; when the battery temperature is in a second preset range, increasing the battery charging power to the maximum power charging voltage; and in response to the remaining battery charge reaching a seventh preset threshold, performing the step of determining the target output voltage based on the remaining battery charge, battery current, and current-regulated voltage.

[0011] Secondly, the present invention provides a power control system capable of implementing the above-mentioned method. The system includes: a data acquisition module for acquiring vehicle operating parameters; the vehicle operating parameters include at least one of power parameters, vehicle operating conditions, navigation information, and historical operating conditions; a judgment module for determining a power control strategy using the vehicle operating parameters through multi-level judgment conditions; the multi-level judgment conditions include at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy includes at least one of controlling target voltage, controlling charging power, and limiting the use of electrical appliances; and an execution module for controlling power according to the power control strategy.

[0012] Thirdly, the present invention provides an electronic device, comprising: one or more processors; and a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors perform the power control method described above.

[0013] Fourthly, the present invention also provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, cause the processor to perform the power control method described above.

[0014] The power control method provided by this invention matches complex operating conditions and adapts to changes in system electrical components through multi-level condition judgment. By planning and controlling the power usage of the low-voltage system according to the power control strategy, it at least partially solves the technical problems of difficulty in adapting to the original power control strategy when new DC-DC converters and related accessories are added to new energy vehicles, and the continuous damage to the battery caused by constant charging, thus achieving the technical effect of optimizing the power consumption of the low-voltage system. Attached Figure Description

[0015] Figure 1 A schematic flowchart of a power control method provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the information principle of a low-voltage system provided in an embodiment of the present invention;

[0017] Figure 3 This is a block diagram of a low-voltage system power management strategy provided in an embodiment of the present invention;

[0018] Figure 4 A structural block diagram of a power control system provided in an embodiment of the present invention;

[0019] Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0021] Where there is no conflict, the various embodiments of the present invention and the features thereof may be combined with each other.

[0022] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0023] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Terms such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art and the invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein.

[0025] In the technical solution of this invention, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information all comply with relevant laws and regulations and do not violate public order and good morals. The use of user data in this technical solution follows relevant national laws and regulations (e.g., the "Information Security Technology - Personal Information Security Specification"). For example: appropriate measures are taken for personal information access control; restrictions are imposed on the display of personal information; the purpose of using personal information does not exceed the scope of direct or reasonable association; and explicit identity targeting is eliminated when using personal information to avoid precisely locating a specific individual.

[0026] The low-voltage electrical system of a vehicle is a fundamental component of the automotive electronic architecture, responsible for powering all electronic devices except for the drive system, ensuring the normal operation of vehicle control, safety, and comfort functions. Its core characteristics include 12V / 24V DC low-voltage power supply, single-wire layout (negative ground), dual power supply redundancy, and parallel connection of equipment. Controlling the power of the low-voltage electrical system helps ensure stable system operation, improve energy efficiency, protect batteries and extend their lifespan, achieve safe redundancy design, and meet the needs of different vehicle operating modes.

[0027] This invention provides a power control method. Figure 1 This is a flowchart illustrating a power control method provided in an embodiment of the present invention, as shown below. Figure 1 As shown, a power control method includes: collecting vehicle operating parameters; the vehicle operating parameters include at least one of power parameters, vehicle operating conditions, navigation information, and historical operating conditions; using the vehicle operating parameters, determining a power control strategy through multi-level judgment conditions; the multi-level judgment conditions include at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy includes at least one of controlling target voltage, controlling charging power, and limiting the use of electrical appliances; and controlling the power according to the power control strategy.

[0028] Figure 2 This is a schematic diagram of the information principle of a low-voltage system provided in an embodiment of the present invention, such as... Figure 2As shown, this invention designs a low-voltage power control method based on a vehicle low-voltage power monitoring module, a vehicle trajectory monitoring module, a low-voltage power prediction and planning module, a low-voltage power control module, and an execution module. The vehicle low-voltage power monitoring module is used for DC-DC power monitoring, monitoring of high-power electrical appliances in the vehicle, and monitoring of low-voltage battery power. The vehicle trajectory monitoring module is used for monitoring vehicle operating conditions such as vehicle temperature / running time, user navigation information, and historical user usage records to collect and analyze user vehicle usage data. The low-voltage power prediction and planning module analyzes and plans the above information to obtain a prediction and planning strategy. The low-voltage power control module designs a low-voltage power control management strategy, determining the power control strategy based on multi-level judgment conditions.

[0029] Through embodiments of this invention, multi-level condition judgment is used to match complex operating conditions and adapt to changes in system electrical components. Based on a power control strategy, the power usage of the low-voltage system is planned and controlled, ensuring that the overall power consumption of low-voltage electrical components is lower than the rated power of the DC-DC converter, thereby increasing the versatility and coverage of DC-DC products. Simultaneously, the power usage of the low-voltage system is specifically planned and controlled according to the user's operating environment and conditions, reducing system energy consumption. This invention can improve the versatility of DC-DC converters and related accessories for new energy vehicles, reduce redundant product development, and optimize the energy consumption of low-voltage systems.

[0030] Based on the above embodiments, vehicle operating parameters are collected, including: using sensors to collect power parameters and vehicle operating conditions; power parameters include at least one of the following: real-time power of DC-DC converter, power of high-power electrical appliances, and power of low-voltage battery; high-power electrical appliances include at least one of the following: low-pressure air PTC, seat heater, window heater, air conditioning blower, air compressor, cooling fan, windshield wipers, battery, headlights, and vehicle audio system; vehicle operating conditions include at least one of the following: vehicle temperature and vehicle operating time; navigation information and historical operating conditions are collected from the database; historical operating conditions include at least the user's historical vehicle usage records.

[0031] Through embodiments of this invention, the power consumption of low-voltage electrical systems is identified, a management list of high-power electrical appliances in the low-voltage system is established, power management is performed on controllable power devices such as batteries that do not affect the user experience, and the operating status of low-voltage power devices in vehicles is monitored in real time. Vehicle operating conditions, navigation information, and historical operating conditions are collected and analyzed to understand the user's vehicle usage.

[0032] Based on the above embodiments, a power control strategy is determined using vehicle operating parameters and multi-level judgment conditions, including: determining whether the vehicle operating parameters meet the power warning conditions (low-voltage power warning zone judgment); the power warning condition is that the warning power is greater than a first preset threshold; the warning power is the real-time power of DC-DC converter or the sum of the real-time power of DC-DC converter and the predicted power; the predicted power is obtained through navigation information and historical operating conditions; if the power warning condition is met, then it is determined whether the energy storage warning condition is met (low-voltage energy storage warning zone judgment); if so, then the use of electrical appliances is restricted according to the warning power and the safe power (low-voltage system degradeable power zone judgment); if not, then the pre-control voltage is calculated based on the remaining battery charge, battery current, real-time voltage and reserve power to control the target voltage; the energy storage warning condition is that the remaining battery charge is less than a second preset threshold or the low-voltage system voltage is less than a third preset threshold; if the power warning condition is not met, then it is determined whether the battery energy-saving condition is met (battery energy-saving zone judgment); if so, then the target voltage is controlled according to the remaining battery charge, battery current and voltage adjustment based on current; if not, then the target voltage and charging power are controlled according to the battery usage (low-voltage system planned power consumption zone judgment).

[0033] Figure 3 A block diagram of a low-voltage system power management strategy provided in an embodiment of the present invention, such as... Figure 3 As shown, the low-voltage system operating conditions are divided into seven types through four levels of judgment, and seven power control strategies are provided: low-voltage system reserve mode, low-voltage system power balance mode, low-voltage system protection mode, low-voltage system energy-saving mode, low-voltage system planning mode, and low-voltage system compensation mode.

[0034] In this embodiment, the power warning condition (low-voltage power warning zone judgment) can optionally be that the real-time DC-DC power is greater than 90% of the maximum DC-DC power or the sum of the real-time DC-DC power and the predicted power is greater than 95% of the maximum DC-DC power; the real-time DC-DC power or the sum of the real-time DC-DC power and the predicted power is defined as the system warning power; when the system warning power is detected to be in the low-voltage power warning zone, the system enters the low-voltage reserve warning zone monitoring; otherwise, the system enters the battery energy-saving zone; the predicted power is monitored by the vehicle's high-power electrical appliance signal.

[0035] In this embodiment, the energy storage early warning condition (low-voltage energy storage early warning zone judgment) can be optionally that the battery SOC is in the power-discharge zone (less than 30%) or the low-voltage system voltage has reached the low limit voltage value (11V); when it is detected that the current low-voltage reserve early warning zone is in the low-voltage system degradeable power zone; otherwise, the system executes the low-voltage system reserve mode.

[0036] In this embodiment, the battery energy-saving condition (battery energy-saving zone judgment) can be optionally defined as the battery temperature being between 10 and 40°C; when the system is in the battery energy-saving zone, the system enters the low-voltage system energy-saving mode; otherwise, the system enters the low-voltage system planned power consumption zone.

[0037] It should be noted that, based on the remaining battery charge, battery current, real-time voltage, and reserve power, a pre-control voltage is calculated to control the target voltage (i.e., low-voltage system reserve mode). Specifically, the system reserve power is calculated based on the battery SOC, battery current, system real-time voltage, and pre-control voltage. When the system reserve power equals the system warning power minus the system safety power, the system can be considered to be in a safe zone. This pre-control voltage can be used as the final DC-DC target control voltage of the system output.

[0038] Wherein, the system safe power is defined as 85% of the maximum power of DC-DC converter, the system reserve power is defined as the battery real-time power minus the battery expected power; the battery real-time power fi = f(VI, I) = I × VI, where the battery current is defined as I and the system real-time voltage is VI; the battery expected power fw = f(Vt, SOC), obtained based on Table 1 (battery parameters need to be actually calibrated), where Vt is the system pre-control voltage and SOC is the battery capacity.

[0039] Table 1

[0040]

[0041] Through the embodiments of the present invention, based on power warning conditions, energy storage warning conditions, and battery energy saving conditions, the operating conditions of low-voltage electrical systems are initially classified, and corresponding solutions are provided for low-voltage reserve warning / safety and battery energy saving warning / safety situations.

[0042] Based on the above embodiments, the use of electrical appliances is restricted according to the warning power and the safe power, including: determining whether the degradeable power is greater than the difference between the warning power and the safe power; if so, then the use of a first degradeable electrical appliance (i.e., low-voltage system power balance mode) is restricted or disabled according to the power parameters; the first degradeable electrical appliance includes at least one of the following: low-pressure air PTC, car audio, and seat heater; if not, the use of a second degradeable electrical appliance (i.e., low-voltage system protection mode) is restricted or disabled; the second degradeable electrical appliance includes at least one of the following: low-pressure air PTC, seat heater, window heater, air conditioning blower, cooling fan, windshield wipers, headlights, and car audio.

[0043] In this embodiment, a degradeable power zone for the low-voltage system is defined. When the degradeable power of the system is greater than or equal to the system warning power minus the system safety power, the system enters the low-voltage system power balance mode; otherwise, the system enters the low-voltage system protection mode. The degradeable power devices include power devices that do not affect vehicle driving safety, such as low-pressure air PTC, car audio, and seat heating.

[0044] In this embodiment, the low-voltage system power balancing mode limits or disables the power of the low-pressure air PTC, car audio system, and seat heater based on the existing vehicle signal and electrical component power parameters, so that the low-voltage system power is within a safe power range. Generally, the power of the low-pressure air PTC is 700~1000W, the power of the car audio system is 200~400W, and the power of the seat heater is around 100W.

[0045] In this embodiment, the low-voltage system protection mode prioritizes ensuring vehicle power supply and operation, while limiting the power of low-pressure air PTC, seat heaters, window heaters, air conditioning blowers, cooling fans, windshield wipers, headlights, and car audio systems; this condition generally occurs in fault mode.

[0046] Through the embodiments of the present invention, based on the difference between the warning power and the safety power, the power that the current system needs to be downgraded to is determined, and electrical appliances are restricted accordingly to prioritize the safe driving of the vehicle.

[0047] Based on the above embodiments, the target voltage (i.e., low-voltage system energy-saving mode) is controlled according to the remaining battery power, battery current, and current-based voltage adjustment, including: determining whether the remaining battery power is in a first preset range; if so, calculating the current-based voltage adjustment based on the current at the current moment, the battery voltage at zero moment, and the battery voltage and current at a preset moment; querying the pre-controlled voltage based on the remaining battery power; summing the current-based voltage adjustment and the pre-controlled voltage to provide the target voltage; if not, querying the pre-controlled voltage based on the remaining battery power to provide the target voltage.

[0048] In this embodiment, the target voltage of the low-voltage system is controlled based on the battery SOC and the real-time battery current I. The target control voltage Vtar is equal to the pre-control voltage V(SOC) plus the voltage amount V(I) based on the current. The pre-control voltage V(SOC) is obtained from Table 2. The target voltage of the system is increased when the SOC is low and decreased when the SOC is high.

[0049] Table 2

[0050]

[0051] The voltage V(I) based on current regulation is expressed as V(I) = I × (V0 - V1) / I1, where I is the real-time battery sensor current, V0 is the voltage at the moment when the battery current is 0, and V1 is the voltage at the moment when the battery current is I1; V0 and V1 are detected and corrected at a certain frequency; V(I) ≤ 2V, and the rate of change of V(I) < 0.1V / s; this correction is only for voltage pre-control in the range of 70% to 80% of battery SOC, so that SOC is in a relatively constant range.

[0052] Through embodiments of the present invention, the State of Charge (SOC) is controlled to remain relatively constant, avoiding repeated charging and discharging from affecting battery life and charging efficiency.

[0053] Based on the above embodiments, the target voltage and charging power are controlled according to battery usage, including: determining whether the planned power consumption conditions are met; the planned power consumption conditions are that the expected driving time is greater than a fourth preset threshold, or the expected battery temperature is greater than a fifth preset threshold, or the remaining battery charge is greater than a sixth preset threshold; if so, a power prediction planning strategy is obtained using vehicle operating conditions, navigation information, and historical operating conditions to serve as a power control strategy (low-voltage system planning mode); the prediction planning strategy is the control of charging power and the restriction of electrical appliance usage during each period of vehicle operation; if not, the target voltage is compensated according to the battery temperature (low-voltage system compensation mode).

[0054] In this embodiment, the planned power consumption conditions can be optionally defined as the customer's expected driving time being greater than 25 minutes, the expected battery temperature being able to rise to 10°C, or the battery charge SOC being greater than or equal to 45%.

[0055] In this embodiment, the low-voltage system compensation mode compensates the target voltage based on the battery temperature, specifically including compensating the charging voltage based on the battery temperature. The system target voltage V (SOC) is obtained from Table 3.

[0056] Table 3

[0057]

[0058] Through the embodiments of the present invention, in the low-voltage system planning mode, since the battery temperature and battery charge have not yet reached the conditions requiring energy saving, but it is expected that energy saving may be required, the power is planned based on a preset predictive planning strategy; in the low-voltage system compensation mode, the system target voltage under low SOC is increased at low temperatures to enhance the battery power preservation capability at low temperatures; and the system maximum target voltage is reduced at high temperatures to reduce the battery charging current and ensure safety.

[0059] Based on the above embodiments, a power prediction and planning strategy is obtained using vehicle operating conditions, navigation information, and historical operating conditions. This includes: obtaining prediction parameters based on vehicle operating conditions, navigation information, and historical operating conditions; the prediction parameters include at least the expected cold-start usage time, the expected warm-start usage time, the expected total driving time, and the expected electrical appliance usage information; using the expected cold-start usage time, the expected warm-start usage time, and the expected total driving time, a first time period and a second time period are determined to determine the prediction and planning strategy; wherein the prediction and planning strategy is as follows: during the first time period, the battery charging power is limited and short-term high-power devices are operated; the short-term high-power devices are determined by the expected electrical appliance usage information; during the second time period, the battery charging power is increased; when the battery temperature is within a second preset range, the battery charging power is increased to the maximum power charging voltage; in response to the remaining battery charge reaching a seventh preset threshold, the step of determining the target output voltage based on the remaining battery charge, battery current, and current-adjusted voltage is executed.

[0060] In this embodiment, vehicle operating conditions, navigation information, and historical operating conditions are analyzed and planned to compile the customer's expected cold-start usage time, expected warm-start usage time, expected total driving time, and electrical appliance usage information, including battery charge, expected seat heating, and expected PTC activation. The predictive planning strategy is as follows: During driving time period 'a', the battery charging power is limited, prioritizing short-term operation of high-power devices (such as seat heating and PTC heating); the peak power of the low-voltage network is reduced; during driving time period 'b', the battery charging power is gradually increased to allow the battery temperature to rise slowly and reduce battery resistance; once the battery temperature is within a suitable range, the maximum power charging voltage is increased.

[0061] For example, based on a predictive planning strategy, the expected driving time T is defined. Within the time period min (T / 3, 10 min), the target voltage of the DC-DC converter is controlled at 13V to limit the low-temperature peak power and preheat the battery. Within the time period min (2T / 3, 15 min), the target voltage of the DC-DC converter is controlled at 14V to accelerate the battery temperature rise. After the time period min (2T / 3, 15 min), the target voltage of the DC-DC converter is controlled at 15.5V to increase the battery charging power until the battery SOC reaches 80% and then enters the low-voltage system energy-saving mode.

[0062] Through the embodiments of the present invention, a charging strategy based on stroke segmentation can be formulated to improve battery charging efficiency, reduce low-voltage charging loss at low temperatures, optimize the power consumption of low-voltage systems, improve the durability of low-voltage batteries, and enhance the low-voltage power retention capability under high and low temperatures.

[0063] Based on the above power control method, this disclosure also provides a power control system. The following will be combined with... Figure 4 The system is described in detail.

[0064] like Figure 4 As shown, the power control system of this embodiment can be used to implement the above method. The system includes: a data acquisition module for acquiring vehicle operating parameters; the vehicle operating parameters include at least one of power parameters, vehicle operating conditions, navigation information, and historical operating conditions; a judgment module for determining a power control strategy using the vehicle operating parameters through multi-level judgment conditions; the multi-level judgment conditions include at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy includes at least one of controlling the target voltage, controlling the charging power, and limiting the use of electrical appliances; and an execution module for controlling the power according to the power control strategy.

[0065] Based on the same inventive concept, embodiments of the present invention also provide an electronic device. Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of the present invention. Figure 5 As shown, an embodiment of the present invention provides an electronic device including: one or more processors 101, a memory 102, and one or more I / O interfaces 103. The memory 102 stores one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement any of the power control methods described in the above embodiments; the one or more I / O interfaces 103 are connected between the processor and the memory, configured to enable information interaction between the processor and the memory.

[0066] The processor 101 is a device with data processing capabilities, including but not limited to a central processing unit (CPU); the memory 102 is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and flash memory (FLASH); the I / O interface (read / write interface) 103 is connected between the processor 101 and the memory 102, and can realize information interaction between the processor 101 and the memory 102, including but not limited to a data bus (Bus).

[0067] In some embodiments, the processor 101, memory 102, and I / O interface 103 are interconnected via bus 104, and thus connected to other components of the computing device.

[0068] In some embodiments, the one or more processors 101 include a field-programmable gate array.

[0069] This invention also provides a computer-readable medium. The computer-readable medium stores a computer program, which, when executed by a processor, implements the steps of any of the power control methods described in the above embodiments. The computer-readable storage medium may be volatile or non-volatile.

[0070] This invention also provides a computer program product, including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code. When the computer-readable code is run in the processor of an electronic device, the processor in the electronic device executes the power control method described above.

[0071] Those skilled in the art will understand that all or some of the steps, systems, and apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software can be distributed on a computer-readable storage medium, which may include computer storage media (or non-transitory media) and communication media (or transient media).

[0072] As is known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable program instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), flash memory or other memory technologies, portable compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, it is known to those skilled in the art that communication media typically contain computer-readable program instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0073] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0074] The computer program instructions used to perform the operations of this invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the computer-readable program instructions. This electronic circuitry can execute the computer-readable program instructions to implement various aspects of the invention.

[0075] The computer program product described herein can be implemented specifically through hardware, software, or a combination thereof. In one alternative embodiment, the computer program product is specifically embodied in a computer storage medium; in another alternative embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0076] Various aspects of the present invention are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0077] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device is generated that implements the functions / actions specified in one or more blocks in the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium, where these instructions cause the computer, programmable data processing device, and / or other device to operate in a specific manner. Thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing various aspects of the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0078] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0079] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction, which contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0080] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for illustrative purposes only and should be construed as such, and is not intended to be limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the invention as set forth in the appended claims.

Claims

1. A power control method, characterized in that, include: Collect vehicle operating parameters; the vehicle operating parameters include at least one of the following: power parameters, vehicle operating conditions, navigation information, and historical operating conditions; Using the vehicle operating parameters, a power control strategy is determined through multi-level judgment conditions; the multi-level judgment conditions include at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy includes at least one of controlling the target voltage, controlling the charging power, and limiting the use of electrical appliances. The power is controlled according to the power control strategy.

2. The method according to claim 1, wherein, The collected vehicle operating parameters include: The power parameters and vehicle operating conditions are collected using sensors; the power parameters include at least one of the following: real-time power of DC-DC converter, power of high-power electrical appliances, and power of low-voltage battery; the high-power electrical appliances include at least one of the following: low-pressure air PTC, seat heater, window heater, air conditioning blower, air compressor, cooling fan, windshield wipers, battery, headlights, and vehicle audio system; the vehicle operating conditions include at least one of the following: vehicle temperature and vehicle operating time. The navigation information and historical operating conditions are collected from the database.

3. The method according to claim 1, wherein, The process of determining a power control strategy using the vehicle operating parameters and multiple decision conditions includes: Determine whether the vehicle operating parameters meet the power warning condition; the power warning condition is that the warning power is greater than a first preset threshold; the warning power is the real-time DC-DC power or the sum of the real-time DC-DC power and the predicted power; the predicted power is obtained by predicting through navigation information and historical operating conditions; If the power warning condition is met, then determine whether the energy storage warning condition is met; if so, then restrict the use of electrical appliances according to the warning power and the safe power; if not, then calculate the pre-control voltage according to the remaining battery power, battery current, real-time voltage and reserve power to control the target voltage; the energy storage warning condition is that the remaining battery power is less than the second preset threshold or the low-voltage system voltage is less than the third preset threshold. If the power warning conditions are not met, determine whether the battery energy-saving conditions are met; if so, control the target voltage based on the remaining battery power, battery current, and voltage adjustment based on current; if not, control the target voltage and charging power based on battery usage.

4. The method according to claim 3, wherein, The restriction of electrical appliance use based on the warning power and safe power includes: Determine whether the degradeable power is greater than the difference between the warning power and the safe power; If so, then based on the power parameters, the first degradeable appliance is restricted or disabled; the first degradeable appliance includes at least one of the following: low-pressure air PTC, car audio system, and seat heater. If not, then the second degradeable electrical appliance shall be restricted or disabled; the second degradeable electrical appliance shall include at least one of the following: low-pressure air PTC, seat heater, window heater, air conditioning blower, cooling fan, windshield wipers, headlights and car audio system.

5. The method according to claim 3, wherein, The step of controlling the target voltage based on the remaining battery power, battery current, and voltage adjustment based on current includes: Determine if the remaining battery power is within the first preset range; If so, then based on the current at the current moment, the battery voltage at zero moment, and the battery voltage and current at the preset moment, calculate the current-based voltage adjustment amount; query the pre-controlled voltage based on the remaining battery power; sum the current-based voltage adjustment amount and the pre-controlled voltage to provide the target voltage; If not, the pre-controlled voltage is queried based on the remaining battery power to serve as the target voltage.

6. The method according to claim 3, wherein, The control of target voltage and charging power based on battery usage includes: Determine whether the planned power consumption conditions are met; the planned power consumption conditions are that the expected driving time is greater than the fourth preset threshold, or the expected battery temperature is greater than the fifth preset threshold, or the remaining battery power is greater than the sixth preset threshold. If so, the vehicle operating conditions, the navigation information, and the historical operating conditions are used to obtain a power prediction and planning strategy for use as a power control strategy; the prediction and planning strategy is to control the charging power and limit the use of electrical appliances at different times of vehicle operation. If not, compensate the target voltage based on the battery temperature.

7. The method according to claim 6, wherein, The power prediction and planning strategy obtained by utilizing the vehicle operating conditions, the navigation information, and the historical operating conditions includes: Based on the vehicle operating conditions, the navigation information, and the historical operating conditions, prediction parameters are obtained; the prediction parameters include at least the expected cold start usage time, the expected warm start usage time, the expected total driving time, and the expected electrical appliance usage information. Using the expected cold-time usage, expected warm-time usage, and expected total driving time, a first time period and a second time period are determined to determine the predictive planning strategy. The predictive planning strategy is as follows: During the first time period, the battery charging power is limited and short-term high-power devices are operated; the short-term high-power devices are determined by the expected appliance usage information; During the second time period, the battery charging power is increased; When the battery temperature is in the second preset range, the battery charging power is increased to the maximum power charging voltage; In response to the remaining battery charge reaching the seventh preset threshold, the step of determining the target output voltage based on the remaining battery charge, battery current, and current-regulated voltage is executed.

8. A power control system, characterized in that, The system is capable of implementing the method as described in any one of claims 1 to 7, and the system comprises: The data acquisition module is used to collect vehicle operating parameters; the vehicle operating parameters include at least one of the following: power parameters, vehicle operating conditions, navigation information, and historical operating conditions. The judgment module is used to determine a power control strategy by using the vehicle operating parameters and through multi-level judgment conditions; the multi-level judgment conditions include at least one of power warning conditions, energy storage warning conditions, and battery energy-saving conditions; the power control strategy includes at least one of controlling the target voltage, controlling the charging power, and limiting the use of electrical appliances. An execution module is used to control the power according to the power control strategy.

9. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1 to 7.

10. A computer-readable medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 7.

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