Power conversion system for autonomous driving and control method thereof

Abstract

A power conversion system for autonomous driving and a control method thereof are disclosed. The system includes a first battery and a second battery, an LDC configured to convert a magnitude of a voltage, output the voltage, and charge the first battery with an output of the LDC, an autonomous driving load electrically connected to the LDC and the first battery and configured to be provided with a power voltage from the LDC or the first battery, and an autonomous driving controller electrically connected to the LDC, the first battery, and the second battery and configured to be provided with a power voltage from one of the LDC, the first battery, or the second battery, wherein the LDC is configured to determine an output of the LDC based on a control parameter including a load amount of the autonomous driving load and a state of charge of the first battery and a state of charge of the second battery.

Description

Technical Field

[0001] This invention relates to a power conversion system and control method for autonomous driving, and more specifically, to a power conversion system and control method for autonomous driving, wherein, in conjunction with controlling the application and vehicle to which the autonomous driving system is applied, not only the state of charge of a first battery is used but also control parameters including the load required by the autonomous driving system are used to improve battery efficiency and lifespan and improve fuel efficiency of the vehicle and application. Background Technology

[0002] In conjunction with the vehicle and application to which the autonomous driving system is applied (hereinafter referred to as "vehicle, etc."), the output required by the autonomous driving controller is typically supplied from the main battery after voltage conversion via a low-voltage DC-DC converter (LDC) for autonomous driving loads, thereby supplying the power required by the electronic equipment of the vehicle, etc.

[0003] Therefore, in the case of autonomous driving of vehicles, or when using electronic devices without autonomous driving, existing systems operate the main battery to supply power to all loads connected to the main battery (including electronic devices and autonomous driving loads). In other words, the problem with conventional systems is that because the main battery is connected to autonomous driving loads, it always continuously supplies power to the autonomous driving system, even when it is not necessary, thereby degrading the overall fuel efficiency of the vehicle.

[0004] Furthermore, even when the vehicle or other vehicles experience a power outage, the current required for the instantaneous start-up and the current required by the autonomous driving controller (also known as dark current) are continuously supplied. Therefore, conventional systems, including a main battery configured to supply power to autonomous driving loads, suffer from the problem that the supply of dark current poses a risk of discharge.

[0005] The information included in the background section of this invention is intended only to enhance the understanding of the general background of the invention and should not be construed as forming prior art known to those skilled in the art or any form of suggestion thereof. Summary of the Invention

[0006] Various aspects of the present invention relate to providing a power conversion system and control method for autonomous driving, wherein, in conjunction with controlling the application and vehicle to which the autonomous driving system is applied, not only the state of charge of a first battery is used but also control parameters including the load required by the autonomous driving system are used to improve the efficiency and life of the battery and improve the fuel efficiency of the vehicle and the application.

[0007] A power conversion system for autonomous driving according to an exemplary embodiment of the present invention may include: a first battery and a second battery; an LDC configured to convert a voltage magnitude, output a converted voltage, and charge the first battery using the output of the LDC; an autonomous driving load electrically connected to the LDC and the first battery and configured to provide a power supply voltage from the LDC or the first battery; and an autonomous driving controller electrically connected to the LDC, the first battery, and the second battery and configured to provide a power supply voltage from one of the LDC, the first battery, or the second battery, wherein the LDC is configured to determine its output based on control parameters including the load of the autonomous driving load, the state of charge of the first battery, and the state of charge of the second battery.

[0008] When the state of charge of the second battery is equal to or greater than the first reference value, the output of LDC can be determined based on the state of charge of the first battery and the value obtained by subtracting the load of the autonomous driving controller from the load of the autonomous driving load. When the state of charge of the second battery is less than the first reference value, the output of LDC can be determined based on the control parameters.

[0009] When the state of charge of the second battery is equal to or greater than the first reference value, the output of the LDC can be determined as the sum of the value obtained by subtracting the load required by the autonomous driving controller from the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the second battery is less than the first reference value, the output of the LDC can be determined based on the control parameters.

[0010] When the state of charge of the first battery is less than the second reference value, the output of LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the first battery is equal to or greater than the second reference value, the output of LDC can be determined based on the control parameters.

[0011] When the state of charge of the first battery is equal to or greater than the fourth reference value, the LDC is configured to set its output to 0, and when the state of charge of the first battery is less than the fourth reference value, the output of the LDC can be determined based on control parameters.

[0012] When the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is equal to or greater than the predetermined reference output, the output of the LDC can be determined as the LDC output with the maximum efficiency in the relationship between the output and efficiency of the LDC. When the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the output of the LDC can be determined as 0.

[0013] When the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is equal to or greater than the predetermined reference output, the output of the LDC can be determined by the LDC as the sum of the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the output of the LDC can be determined as the LDC output with the maximum efficiency in the relationship between the output of the LDC and the efficiency.

[0014] A method for controlling a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is a power conversion method using a power conversion system according to claim 1, the method comprising: receiving inputs of the load amount of the autonomous driving load and the state of charge of the first battery and the state of charge of the second battery; and determining the output of the LDC based on the load amount of the autonomous driving load, the state of charge of the first battery and the state of charge of the second battery.

[0015] When determining the output of the LDC, if the state of charge of the second battery is equal to or greater than the first reference value, the output of the LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery, with the load required by the autonomous driving controller already subtracted from the load of the autonomous driving load. If the state of charge of the second battery is less than the first reference value, the output of the LDC can be determined based on the control parameters.

[0016] When determining the output of the LDC, if the state of charge of the first battery is less than the second reference value, the output of the LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery. If the state of charge of the first battery is equal to or greater than the second reference value, the output of the LDC can be determined based on the control parameters.

[0017] When determining the output of the LDC, the output of the LDC can be set to 0 when the state of charge of the first battery is equal to or greater than the fourth reference value, and the output of the LDC can be determined based on the control parameters when the state of charge of the first battery is less than the fourth reference value.

[0018] When determining the output of the LDC, if the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is equal to or greater than the predetermined reference output, the output of the LDC with the maximum efficiency in the relationship between the output and efficiency of the LDC can be determined, and if the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the output of the LDC can be determined to be 0.

[0019] When determining the output of the LDC, when the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is equal to or greater than the predetermined reference output, the output of the LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the output of the LDC can be determined as the LDC output with the maximum efficiency in the relationship between the output and efficiency of the LDC.

[0020] The advantages of the power conversion system and control method for autonomous driving according to an exemplary embodiment of the present invention are that, in conjunction with the application and vehicle to which the autonomous driving system is applied, not only the state of charge of the first battery is used, but also control parameters including the load required by the autonomous driving system are used to improve the efficiency and life of the battery and improve the fuel efficiency of the vehicle and the application.

[0021] The methods and apparatus of the present invention have other features and advantages, which will be apparent or set forth in more detail in conjunction with the accompanying drawings and the following detailed description, which together serve to explain certain principles of the invention. Attached Figure Description

[0022] Figure 1 The configuration of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is shown;

[0023] Figure 2 This is a current efficiency curve of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention.

[0024] Figure 3 This is a graph illustrating the mechanism of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention; and

[0025] Figure 4 This is a flowchart illustrating a method for controlling a power conversion system for autonomous driving according to an exemplary embodiment of the present invention.

[0026] It is understood that the accompanying drawings are not necessarily drawn to scale and present slightly simplified representations of various features illustrating the basic principles of the invention. Specific design features of the invention as included herein (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific intended application and environment of use.

[0027] Throughout the accompanying drawings, reference numerals refer to the same or equivalent parts of the invention. Detailed Implementation

[0028] Reference will now be made in detail to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments thereof, it will be understood that this specification is not intended to limit the invention to those exemplary embodiments. On the other hand, the invention is intended to cover not only the exemplary embodiments thereof, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0029] To describe exemplary embodiments of the invention, specific structural or functional descriptions of embodiments of the invention included in the specification or this application are shown, and embodiments of exemplary embodiments of the invention may be implemented in various forms. It may not be construed that embodiments of exemplary embodiments of the invention are limited to those described in the specification or application. Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0030] Figure 1 The configuration of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is shown. Figure 2 This is a current efficiency curve of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. Figure 3 This is a graph illustrating the mechanism of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. Figure 4 This is a flowchart illustrating a method for controlling a power conversion system for autonomous driving according to an exemplary embodiment of the present invention.

[0031] Figure 1 The configuration of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is shown. The power conversion system for autonomous driving according to an exemplary embodiment of the present invention may include: a first battery 110 and a second battery 120; an LDC 130 configured to convert the magnitude of a voltage, output a voltage, and charge the first battery using the output of the LDC; an autonomous driving load 11 configured to be supplied with a power supply voltage from the LDC or the first battery; and an autonomous driving controller 10 configured to be supplied with a power supply voltage from one of the LDC, the first battery, or the second battery, wherein the output of the LDC 130 is determined based on control parameters including the load of the autonomous driving load 11 and the charging state of the first battery 110 and the second battery 120.

[0032] Figure 1The configuration of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is shown. When the state of charge of the second battery is equal to or greater than a first reference value, the output of the LDC is determined based on the state of charge of the first battery and a value obtained by subtracting the load of the autonomous driving controller from the load of the autonomous driving load. When the state of charge of the second battery is less than the first reference value, the output of the LDC can be determined based on control parameters. Furthermore, when the state of charge of the second battery is equal to or greater than the first reference value, the output of the LDC can be determined as the sum of a value obtained by subtracting the load required by the autonomous driving controller from the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the second battery is less than the first reference value, the output of the LDC can be determined based on control parameters. That is, in an exemplary embodiment of the present invention, when the state of charge of the second battery, which serves as a backup battery, is sufficient, the second battery is provided with power for autonomous driving, and the power efficiency of the entire system is reconsidered by determining the output to be consumed from the main battery (excluding the second battery) based on the state of charge of the battery used for autonomous driving and the load of the autonomous driving load.

[0033] like Figure 1 As shown, the power conversion system for autonomous driving according to an exemplary embodiment of the present invention is divided into three systems, mainly including: a first battery 110, which is configured to provide power to the autonomous driving load 11; an LDC 130, which is configured to convert the voltage values ​​of the first battery 110 and the main battery 210, which are responsible for the power of the autonomous driving load 11 and the autonomous driving controller 10, and perform output; and a main battery LDC 220 and a second battery 120, which are backup power sources mainly responsible for the power of electronic devices such as vehicles and partially responsible for the power of the autonomous driving controller 10.

[0034] The LDC controller 100, configured to control the current of LDC 130, receives input from the autonomous driving controller 10 regarding information related to the load amount of the autonomous driving load 11, and increases or decreases the current based on factors such as time, the amount or sequence of load distribution, etc. Furthermore, the LDC controller 100 receives input from the first and second batteries regarding information related to their state of charge / discharge, degradation state, charge / discharge rate, usage time, etc. Subsequently, the LDC controller 100 determines the output of LDC 130 based on control parameters including the load amount of the autonomous driving load 11 and the state of charge of the first battery 110 and the second battery 120 to control the current of LDC 130.

[0035] In the lower levels of driver assistance and partial automation within existing autonomous driving assistance systems, the object of monitoring the driving environment is the human, and therefore, the current dark current does not account for a significant load in autonomous driving systems that assist steering or acceleration and deceleration. However, autonomous driving systems that remain at Level 2 have evolved. Therefore, even when the engine of the vehicle, etc., is off, the current required for the immediate subsequent restart of the engine and autonomous driving controller (also known as dark current) can further increase. However, in the case of conditional automation or high automation where the autonomous driving system fully monitors the driving environment, a significant amount of energy is required for driving maneuvers or driving environment monitoring before a request for driver intervention is made.

[0036] In existing systems, the main battery 210, which supplies power to electronic devices such as vehicles, converts the voltage value via a low-voltage DC-DC converter (LDC) 130 for autonomous driving loads and provides voltage through a fixed output. Therefore, in autonomous driving systems, loads due to excessive dark current may continuously occur in the main battery, posing a risk of battery discharge. Furthermore, existing systems rely on the main battery, and thus operate it even when only electronic devices are used, supplying power to all connected loads (including electronic devices and autonomous driving loads). In other words, conventional systems connect the main battery to autonomous driving loads, and therefore the main battery is always continuously supplying power to the autonomous driving system (even when unnecessary), leading to a reduction in the vehicle's overall fuel efficiency.

[0037] Therefore, in the power conversion system for autonomous driving according to an exemplary embodiment of the present invention, the LDC controller 100 combines the operation of all electrical devices except the main battery of the vehicle, etc., and controls the output based on control parameters, thereby solving the above-mentioned problems.

[0038] First, the LDC controller 100 excludes the main battery from the parameters that should be considered for controlling the LDC output. Therefore, an exemplary embodiment of the present invention can stably supply the LDC output according to the autonomous driving load, independent of the main battery's state of discharge. The LDC controller 100 determines the LDC 130 output based on control parameters of the autonomous driving load 11, in addition to the charging states of the first battery 110 (serving as the main power source for the autonomous driving load 11) and the second battery 120 (serving as a backup power source).

[0039] Therefore, exemplary embodiments of the present invention prevent inefficiencies caused by controlling the LDC output solely based on the battery's state of charge (regardless of the vehicle's condition). If the LDC controller 100 performs control that sets the LDC 130 output to 0 (i.e., discharge control) solely based on the high state of charge of the first battery 110 or the second battery 120, this is inefficient. On the other hand, performing control that maximizes the LDC 130 output (i.e., charge control) solely based on the very low state of charge of the first battery 110 or the second battery 120 is even less desirable in terms of efficiency and reduced lifespan, especially due to prolonged exposure to high temperatures.

[0040] Therefore, in the power conversion system for autonomous driving according to an exemplary embodiment of the present invention, the LDC controller 100 determines the output of the LDC based on control parameters including the autonomous driving load 11 for evaluating the state of the vehicle, etc., thereby greatly improving the state of health (SOH) of the batteries 110 and 120 and the LDC 130 in addition to improving the fuel efficiency of the vehicle, etc.

[0041] Figure 2 This is a current efficiency curve of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. Figure 2 The horizontal axis of the graph indicates the output current of the LDC 130, and the vertical axis indicates the efficiency of the LDC. For example... Figure 2 As shown, as the current of the LDC increases, the efficiency of the LDC 130 increases to near its maximum efficiency point and then decreases from the overcurrent point. Therefore, in terms of fuel efficiency, the output of the LDC 130 can be controlled at the maximum efficiency point current when an autonomous driving load occurs (hereinafter, this is referred to as "maximum efficiency point control" or "LDC maximum efficiency point current control"). When the first battery 110 emits and provides discharge current to the autonomous driving load, the LDC 130 can be controlled to not provide output (hereinafter, this is referred to as "discharge control" or "LDC discharge current control"). Furthermore, the LDC 130 can be controlled such that, in the absence of autonomous mode, the LDC 130 only provides the autonomous driving controller 10 load as a minimum autonomous driving load, and other loads are provided by the second battery 120. The LDC 130 can be controlled such that the current is maximized to charge the first battery 110 responsible for the autonomous driving load, regardless of maximum efficiency, or corresponding to the sum of the output current required for charging and the load of the autonomous driving load (hereinafter, this is referred to as "charging control" or "LDC charging current control"). An embodiment of a control mode in which the LDC output is selectively executed based on control parameters will be described below.

[0042] Figure 3This is a graph illustrating the mechanism of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. When the state of charge of the first battery 110 is less than a second reference value, the output of the LDC 130 can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery. When the state of charge of the first battery is equal to or greater than the second reference value, the output of the LDC 130 can be determined based on control parameters. Furthermore, when the state of charge of the first battery is equal to or greater than a fourth reference value, the output of the LDC 130 is determined to be 0, and when the state of charge of the first battery 110 is less than the fourth reference value, the output of the LDC can be determined based on control parameters. That is, the power conversion system for autonomous driving according to an exemplary embodiment of the present invention can measure only the state of charge of the first battery 110 to perform LDC charging control and discharging control for the state of charge of the first battery 110, and can centralize the autonomous driving load through the first battery 110.

[0043] Figure 3 This is a graph illustrating the mechanism of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. When the state of charge of the first battery is equal to or greater than a third reference value and the load of the autonomous driving load is equal to or greater than a first reference output, the output of the LDC can be determined as the LDC output with maximum efficiency in the relationship between LDC output and efficiency, and when the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the first reference output, the output of the LDC can be determined as 0. In other words, the power conversion system for autonomous driving according to an exemplary embodiment of the present invention measures the state of charge of the first battery 110 and the load of the autonomous driving load 11 to perform maximum efficiency point control or discharge control of the LDC 130, thereby increasing fuel efficiency.

[0044] Figure 3 This is a graph illustrating the mechanism of a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. When the state of charge of the first battery is less than a third reference value and the load of the autonomous driving load is equal to or greater than the first reference output, the output of the LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery. Furthermore, when the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the first reference output, the output of the LDC can be determined as the LDC output with maximum efficiency in the relationship between LDC output and efficiency. Therefore, the power conversion system for autonomous driving according to an exemplary embodiment of the present invention measures the state of charge of the first battery 110 and the load of the autonomous driving load 11 to perform maximum efficiency point control or charging control of the LDC 130, thereby increasing fuel efficiency.

[0045] Figure 4This is a flowchart illustrating a method for controlling a power conversion system for autonomous driving according to an exemplary embodiment of the present invention. The method for controlling a power conversion system for autonomous driving according to an exemplary embodiment of the present invention is a power conversion method using the power conversion system, the power conversion method including: a step (S100) of receiving inputs of the load amount of the autonomous driving load 11 and the charging state of the first battery 110 and the second battery 120; and a step of determining the output of LDC 130 based on the load amount of the autonomous driving load 11 and the charging state of the first battery 110 and the second battery 120.

[0046] The next step is to supply power to the autonomous driving controller via the backup power control of the second battery 120 (S204). In the step of determining the output of LDC, when the state of charge of the second battery is equal to or greater than the first reference value (S202), the LDC is configured to determine the output of the LDC as the sum of the load of the autonomous driving load and the output required to charge the first battery, having already subtracted the load required by the autonomous driving controller from the load of the autonomous driving load, and when the state of charge of the second battery is less than the first reference value, the output of the LDC can be determined based on control parameters (S200).

[0047] The next step corresponds to discharge control that prioritizes the discharge of the first battery. In the step of determining the output of LDC, when the state of charge of the first battery is equal to or greater than the fourth reference value (S302), the output of LDC can be determined to be 0 (S300), and when the state of charge of the first battery is less than the fourth reference value, the output of LDC can be determined based on the control parameters.

[0048] The next step corresponds to charging control that prioritizes the charging of the first battery 110. In the step of determining the output of LDC, when the state of charge of the first battery is less than the second reference value (S304), the output of LDC can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery (S400), and when the state of charge of the first battery is equal to or greater than the second reference value, the output of LDC can be determined based on the control parameters.

[0049] The next step corresponds to selective control of maximum efficiency point control and discharge control. In the step of determining the LDC output, when the state of charge of the first battery is equal to or greater than the third reference value (S306) and the load of the autonomous driving load is equal to or greater than the first reference output (S402), the LDC output with maximum efficiency in the relationship between LDC output and efficiency can be determined (S500), and when the state of charge of the first battery is equal to or greater than the third reference value (S308) and the load of the autonomous driving load is less than the first reference output (S402), the LDC output can be determined to be 0 (S300).

[0050] The next step corresponds to selective control of maximum efficiency point control and charging control. In the step of determining the LDC output, when the state of charge of the first battery is less than the third reference value (S400) and the load of the autonomous driving load is equal to or greater than the first reference output (S402), the LDC output can be determined as the sum of the load of the autonomous driving load and the output required to charge the first battery (S400). And when the state of charge of the first battery is less than the third reference value (S308) and the load of the autonomous driving load is less than the first reference output (S402), the LDC output can be determined as the LDC output with maximum efficiency in the relationship between LDC output and efficiency (S500).

[0051] This invention relates to a power conversion system and control method for autonomous driving, wherein the output of the LDC is determined by control parameters indicating the external environment of the vehicle or the like and the state of its power supply equipment.

[0052] In existing systems, the main battery 210, which supplies power to electronic devices such as vehicles, converts the voltage value via a low-voltage DC-DC converter (LDC) 130 for autonomous driving loads, and the power is supplied as a fixed output. Therefore, the autonomous driving system is at risk of battery discharge due to excessive dark current in the main battery. Furthermore, existing systems rely on the main battery, and thus, when power is supplied to electronic devices, power is always continuously supplied to the autonomous driving system, even when autonomous driving control is not required, leading to a reduction in the vehicle's overall fuel efficiency.

[0053] However, the power conversion system and control method for autonomous driving according to an exemplary embodiment of the present invention control the output of the LDC not only by using the state of charge of the first battery but also by using control parameters including the load required by the autonomous driving system. The LDC controller 100 determines the output of the LDC 130 based not only on the state of charge of the first battery 110, which serves as the main power source for the autonomous driving load 11, and the second battery 120, which serves as the backup power source, but also on the control parameters including the autonomous driving load 11. Therefore, the exemplary embodiment minimizes the low efficiency and reduced lifespan of the LDC caused by controlling the output of the LDC solely based on the state of charge of the batteries (regardless of the state of the vehicle, etc.). Therefore, in the power conversion system for autonomous driving according to an exemplary embodiment of the present invention, the LDC controller 100 determines the output of the LDC based on the control parameters including the autonomous driving load 11 used to evaluate the state of the vehicle, etc., thereby greatly improving the state of health (SOH) of the batteries 110 and 120 and the LDC 130, in addition to improving the fuel efficiency of the vehicle, etc.

[0054] Furthermore, terms related to control devices, such as "controller," "control device," "control unit," "control equipment," "control module," or "server," refer to hardware devices including a memory and a processor configured to execute one or more steps interpreted as an algorithmic structure. The memory stores the algorithmic steps, and the processor executes the algorithmic steps to perform one or more processes of methods according to various exemplary embodiments of the present invention. A control device according to exemplary embodiments of the present invention may be implemented by: a non-volatile memory configured to store algorithms for controlling the operation of various components of a vehicle or data relating to software commands for executing the algorithms; and a processor configured to perform the aforementioned operations using the data stored in the memory. The memory and processor may be separate chips. Alternatively, the memory and processor may be integrated into a single chip. The processor may be implemented as one or more processors. The processor may include various logic circuits and operational circuits that can process data according to a program provided from the memory and generate control signals based on the processing results.

[0055] The control device may be at least one microprocessor operated by a predetermined program, which may include a series of commands for executing the methods included in the various exemplary embodiments of the present invention described above.

[0056] The invention described above can also be embodied as computer-readable code on a computer-readable recording medium. A computer-readable recording medium is any data storage device capable of storing data that can subsequently be read by a computer system, and storing and executing program instructions that can subsequently be read by a computer system. Examples of computer-readable recording media include hard disk drives (HDDs), solid-state drives (SSDs), silicon disk drives (SDDs), read-only memory (ROM), random access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, etc., and are implemented as carrier waves (e.g., transmitted over the Internet). Examples of program instructions include machine language code generated by a compiler, and high-level language code that can be executed by a computer using an interpreter.

[0057] In various exemplary embodiments of the present invention, each of the above operations may be performed by a control device, and the control device may be configured by multiple control devices or a single integrated control device.

[0058] In various exemplary embodiments of the present invention, the control device may be implemented in hardware or software, or in a combination of hardware and software.

[0059] Furthermore, terms such as “unit” and “module” included in the specification mean a unit for performing at least one function or operation, which may be implemented by hardware, software or a combination thereof.

[0060] For ease of interpretation and precise definition in the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “up,” “lower,” “upward,” “downward,” “front,” “back,” “inner,” “outer,” “inward,” “outer,” “inward,” “inner,” “external,” “forward,” and “backward” are used to describe features of exemplary embodiments with reference to the positions of such features shown in the accompanying drawings. It will be further understood that the term “connection” or its derivatives refer to both direct and indirect connections.

[0061] For purposes of illustration and description, the foregoing description of specific exemplary embodiments of the invention has been presented. These descriptions are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and it will be apparent that many modifications and variations are possible in accordance with the foregoing teachings. Exemplary embodiments were chosen and described to explain certain principles of the invention and its practical application, so that others skilled in the art can make and utilize various exemplary embodiments of the invention, as well as various alternatives and modifications thereof. The scope of the invention is intended to be defined by the appended claims and their equivalents.

Claims

1. A power conversion system for autonomous driving, the power conversion system comprising: First battery and second battery; A low-voltage DC-DC converter (LDC) is configured to convert the magnitude of the voltage, outputs the converted voltage, and uses the output of the LDC to charge the first battery. An autonomous driving load, which is electrically connected to the LDC and the first battery, and is configured to be supplied with a power supply voltage from the LDC or the first battery; as well as An autonomous driving controller, electrically connected to the LDC, the first battery, and the second battery, and configured to provide a power supply voltage from one of the LDC, the first battery, or the second battery. The LDC is configured to determine its output based on control parameters, including the load of the autonomous driving payload, the state of charge of the first battery, and the state of charge of the second battery. When the state of charge of the second battery is equal to or greater than the first reference value, the LDC is configured to determine the output of the LDC based on a value obtained by subtracting the load of the autonomous driving controller from the load of the autonomous driving load.

2. The power conversion system of claim 1, wherein when the state of charge of the second battery is equal to or greater than the first reference value, the LDC is configured to determine the output of the LDC based on the state of charge of the first battery and the value, and when the state of charge of the second battery is less than the first reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

3. The power conversion system of claim 1, wherein when the state of charge of the second battery is equal to or greater than the first reference value, the LDC is configured to determine the output of the LDC as the sum of the value and the output required to charge the first battery, and when the state of charge of the second battery is less than the first reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

4. The power conversion system of claim 3, wherein when the state of charge of the first battery is equal to or greater than the fourth reference value, the LDC is configured to determine the output of the LDC as 0, and when the state of charge of the first battery is less than the fourth reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

5. The power conversion system according to claim 4, When determining the output of the LDC, if the state of charge of the first battery is equal to or greater than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine its output as the LDC output with maximum efficiency in the relationship between LDC output and efficiency. Conversely, if the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine its output as 0. The fourth reference value is greater than the third reference value.

6. The power conversion system according to claim 4, Specifically, when determining the output of the LDC, if the state of charge of the first battery is less than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine its output as the sum of the load of the autonomous driving load and the output required to charge the first battery. Furthermore, if the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine its output as the LDC output with the maximum efficiency in the relationship between LDC output and efficiency. The fourth reference value is greater than the third reference value.

7. The power conversion system of claim 1, wherein when the state of charge of the first battery is less than a second reference value, the LDC is configured to determine the output of the LDC as the sum of the load of the autonomous driving load and the output required to charge the first battery, and when the state of charge of the first battery is equal to or greater than the second reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

8. The power conversion system according to claim 7, Wherein, when the state of charge of the first battery is equal to or greater than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine the output of the LDC as the LDC output with maximum efficiency in the relationship between the LDC output and efficiency; and when the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine the output of the LDC as 0. The third reference value is greater than the second reference value.

9. The power conversion system according to claim 7, Wherein, when the state of charge of the first battery is less than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine the output of the LDC as the sum of the load of the autonomous driving load and the output required to charge the first battery; and when the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine the output of the LDC as the LDC output with the maximum efficiency in the relationship between the output and efficiency of the LDC. The third reference value is greater than the second reference value.

10. A method for controlling a power conversion system for autonomous driving, the power conversion system comprising a first battery and a second battery, a low-voltage DC-DC converter (LDC), an autonomous driving load, and an autonomous driving controller, the method comprising: Receives inputs of the load amount of the autonomous driving load and the charging status of the first battery and the charging status of the second battery; as well as The output of the LDC is determined based on control parameters, including the load of the autonomous driving payload, the state of charge of the first battery, and the state of charge of the second battery. Wherein: the LDC is configured to convert the magnitude of the voltage, output the converted voltage, and use the output of the LDC to charge the first battery. The autonomous driving load is electrically connected to the LDC and the first battery, and is configured to receive a power supply voltage from the LDC or the first battery. The autonomous driving controller is electrically connected to the LDC, the first battery, and the second battery, and is configured to receive a power supply voltage from one of the LDC, the first battery, or the second battery. The determination of the LDC output includes: when the state of charge of the second battery is equal to or greater than the first reference value, the LDC output is determined by the LDC based on the value obtained by subtracting the load of the autonomous driving controller from the load of the autonomous driving load.

11. The method of claim 10, wherein when determining the output of the LDC, when the state of charge of the second battery is equal to or greater than the first reference value, the LDC is configured to determine the output of the LDC as the sum of the value and the output amount required to charge the first battery, and when the state of charge of the second battery is less than the first reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

12. The method of claim 10, wherein when determining the output of the LDC, when the state of charge of the first battery is less than a second reference value, the LDC is configured to determine the output of the LDC as the sum of the load of the autonomous driving load and the output required to charge the first battery, and when the state of charge of the first battery is equal to or greater than the second reference value, the LDC is configured to determine the output of the LDC based on the control parameters.

13. The method according to claim 12, Specifically, when determining the output of the LDC, if the state of charge of the first battery is equal to or greater than the fourth reference value, the LDC is configured to set its output to 0; and if the state of charge of the first battery is less than the fourth reference value, the LDC is configured to determine its output based on the control parameters. The fourth reference value is greater than the second reference value.

14. The method according to claim 13, When determining the output of the LDC, if the state of charge of the first battery is equal to or greater than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine its output as the LDC output with maximum efficiency in the relationship between LDC output and efficiency. Conversely, if the state of charge of the first battery is equal to or greater than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine its output as 0. The fourth reference value is greater than the third reference value, and the third reference value is greater than the second reference value.

15. The method according to claim 13, Specifically, when determining the output of the LDC, if the state of charge of the first battery is less than a third reference value and the load of the autonomous driving load is equal to or greater than a predetermined reference output, the LDC is configured to determine its output as the sum of the load of the autonomous driving load and the output required to charge the first battery. Furthermore, if the state of charge of the first battery is less than the third reference value and the load of the autonomous driving load is less than the predetermined reference output, the LDC is configured to determine its output as the LDC output with the maximum efficiency in the relationship between LDC output and efficiency. The fourth reference value is greater than the third reference value, and the third reference value is greater than the second reference value.

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