Automobile direct current converter control method and device and vehicle

Abstract

The embodiment of the invention provides an automobile direct-current converter control method and device and a vehicle, relates to the technical field of automobile electronics and electricities, and mainly comprises the steps of intermittently detecting a current enable signal state according to a preset period, obtaining a power demand of a whole vehicle load and the electric quantity of a storage battery, responding to the current enable signal state, and controlling the direct-current converter of the vehicle. After determining the detection sequence of the electricity demand and the electric quantity and the corresponding judgment strategy, executing the detection judgment strategy and deciding whether to adjust the enable signal; and finally, outputting a target enable signal to the direct current converter according to the decision result, wherein the target enable signal can comprise a first enable signal for triggering the direct current converter to enter a preset activation mode and a second enable signal for triggering the direct current converter to enter a preset standby mode. According to real-time feedback, the working state of the direct-current converter is flexibly regulated and controlled, so that an electrical system of the whole vehicle has higher adaptability, and power requirements under different working conditions can be effectively met.

Description

[Technical field]

[0001] The embodiments of the present application relate to the field of automotive electronic and electrical technology, and in particular, to a method and device for controlling an automotive direct current converter, and a vehicle. [Background technology]

[0002] At present, DC / DC converters (referred to as DC converters in this application) play a vital role in modern automotive electronic systems, responsible for converting high-voltage battery voltage into 12V low voltage to charge lead-acid batteries and meet the power demand of vehicle equipment. The efficiency of the DC converter is strongly related to the load, that is, the efficiency characteristics will be significantly affected by the load conditions: for example, under low load conditions, the efficiency of the DC converter is usually low because the control circuit and switch losses are relatively large; while under high load, the efficiency of the DC converter is significantly improved because the loss in the energy conversion process is relatively small and the components work in a relatively better characteristic range.

[0003] Therefore, improving the conversion efficiency of DC converters has become the focus of the industry. First of all, this not only helps to reduce energy loss and improve the overall efficiency of the system, but also prolongs the battery life and reduces heat generation, thereby improving the reliability of the system. At the same time, under today's increasingly stringent automotive energy efficiency standards, efficient power management solutions help reduce carbon emissions and improve the environmental performance of vehicles. Therefore, optimizing the working efficiency of DC converters is of great significance to improving the overall performance and sustainability of automotive electronic systems. [Summary of the invention]

[0004] The embodiments of the present application propose a method, device and vehicle for controlling an automotive DC converter, which relate to the field of automotive electronic and electrical technology. The method and device can operate the DC converter only when needed through an intermittent working mode, thereby reducing energy loss and improving the energy efficiency of the overall system. The method can monitor and control the charging and discharging process of the battery in real time to avoid excessive discharge and charging, promote the health of the battery, and improve its reliability and durability. The working state of the DC converter can be dynamically adjusted according to load demand, making the electrical system of the entire vehicle more adaptable and better able to cope with power demands under different working conditions.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling a DC converter of an automobile, the method comprising:

[0006] Intermittently detect the current enabling signal status according to the preset cycle, and obtain the power demand of the vehicle load and the battery power;

[0007] In response to the current state of the enable signal, determining a detection order of the power demand and the power quantity and a corresponding judgment strategy;

[0008] According to the detection order and the judgment strategy, decide whether to adjust the enable signal;

[0009] Based on the decision result, a target enable signal is output to the DC converter, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode and a second enable signal for triggering the DC converter to enter a preset standby mode.

[0010] In at least one possible implementation, in response to the current enable signal state, determining the detection order of the power demand and the power quantity and the corresponding judgment strategy includes at the beginning of each cycle detection:

[0011] If the current enable signal is the first enable signal, the power demand represented by the electric power is detected first and a corresponding judgment strategy is executed;

[0012] If the current enable signal is the second enable signal, the electrical quantity represented by the SOC is detected first and a corresponding determination strategy is executed.

[0013] In at least one possible implementation manner, the deciding whether to adjust the enable signal according to the detection order and the judgment strategy includes:

[0014] If the current enable signal is the first enable signal, determining whether the power demand is greater than or equal to a predetermined first power threshold;

[0015] If the power demand is greater than or equal to a predetermined first power threshold, maintaining the output of the first enable signal;

[0016] If the power demand is less than the first power threshold, detecting whether the power is greater than a predetermined first SOC threshold;

[0017] If the electric quantity is greater than the first SOC threshold, the first enable signal is changed into a second enable signal and outputted;

[0018] If the electric quantity is less than or equal to the first SOC threshold, the first enable signal is kept output.

[0019] In at least one possible implementation manner, the deciding whether to adjust the enable signal according to the detection order and the judgment strategy includes:

[0020] If the current enable signal is the second enable signal, determining whether the power is less than a predetermined second SOC threshold;

[0021] If the electric quantity is less than the second SOC threshold, the second enable signal is changed into the first enable signal and outputted;

[0022] If the power level is greater than or equal to a second SOC threshold, detecting whether the power demand is greater than a predetermined second power threshold;

[0023] If the power demand is greater than the second power threshold, the second enable signal is changed into the first enable signal and outputted;

[0024] If the power demand is less than or equal to the second power threshold, the second enable signal is kept output.

[0025] In at least one possible implementation manner, the control method further includes: after outputting the target enable signal to the DC converter, receiving a current or voltage signal fed back by the DC converter for determining a working state of the DC converter.

[0026] In at least one possible implementation, before entering the periodic continuous detection phase, the control method may further include: after the vehicle is powered on and completes self-test, setting an initial enable signal; the initial enable signal is a first enable signal.

[0027] The technical effects of this solution can be referred to as follows: This application uses periodic continuous monitoring and dynamic control to identify load demand and battery status, thereby dynamically adjusting the enable signal for different working modes of the DC converter. On the one hand, the DC converter can only work when needed, reducing energy loss and improving the energy efficiency of the overall system; on the other hand, it can effectively manage the charging and discharging process of the battery, avoid excessive discharge and charging, promote the health of the battery, and improve its reliability and durability. Through the above-mentioned optimized power supply management, the DC converter can always work in the high-efficiency zone under different load conditions in a dynamic adjustment manner.

[0028] In a second aspect, an embodiment of the present application provides a vehicle DC converter control device, the device comprising:

[0029] The cycle detection module is used to intermittently detect the current enable signal status according to a preset cycle and obtain the power demand of the vehicle load and the battery power;

[0030] A detection judgment strategy determination module, used to determine the detection order of the power demand and the power quantity and the corresponding judgment strategy in response to the current enable signal state;

[0031] An enable signal adjustment decision module, used to decide whether to adjust the enable signal according to the detection order and the judgment strategy;

[0032] An enable signal output module is used to output a target enable signal to the DC converter based on the decision result, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode, and a second enable signal for triggering the DC converter to enter a preset standby mode.

[0033] In a third aspect, an embodiment of the present application provides an electronic device, comprising: one or more processors, a memory, and one or more computer programs, wherein the memory may adopt a non-volatile storage medium, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the device, the electronic device performs the method as described in the first aspect or any possible implementation manner of the first aspect.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer-readable storage medium is run on a computer, the computer executes the method as described in the first aspect or any possible implementation of the first aspect.

[0035] In a fifth aspect, an embodiment of the present application provides a vehicle, comprising the electronic device in the embodiment of the third aspect and the computer-readable storage medium in the embodiment of the fourth aspect.

[0036] It should be understood that the second to fifth aspects of the embodiments of the present application are consistent with the technical solutions of the first aspect of the embodiments of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic flow chart of a method for controlling a DC converter of an automobile provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of an automotive DC converter control device provided in an embodiment of the present application. [Specific implementation method]

[0040] In order to better understand the technical solution of this specification, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0042] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit this specification. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] In view of the working status of the automotive DC / DC mentioned above, the embodiment of the present application provides a method for controlling an automotive DC converter. The method is periodically and continuously monitored and dynamically controlled to identify load requirements and battery status, thereby dynamically adjusting the enable signal for different working modes of the DC converter. On the one hand, the DC converter can work only when needed, reducing energy loss and improving the energy efficiency of the overall system; on the other hand, it can effectively manage the charging and discharging process of the battery, avoid excessive discharge and charging, promote the health of the battery, and improve its reliability and durability. Through the above-mentioned optimized power supply management, the DC converter can always work in the high-efficiency zone under different load conditions in a dynamic adjustment manner.

[0044] The technical solution protected by the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1 , is a flow chart of a method for controlling a DC converter of an automobile provided in an embodiment of the present application. The flow chart of the method is described as follows:

[0046] Step S1, intermittently detect the current enabling signal state according to a preset period, and obtain the power demand of the vehicle load and the power of the battery;

[0047] Step S2, in response to the current state of the enable signal, determining the detection order of the power demand and the power quantity and the corresponding judgment strategy;

[0048] Step S3, deciding whether to adjust the enable signal according to the detection order and the judgment strategy;

[0049] Step S4: output a target enable signal to the DC converter based on the decision result, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode and a second enable signal for triggering the DC converter to enter a preset standby mode.

[0050] That is, the DC converter can determine its operating mode according to the target enable signal (EN) currently sent by the charging control system. From this, two operating modes, an activation mode and a standby mode, can be preset for the DC converter in advance, and the corresponding target enable signals include a first enable signal and a second enable signal.

[0051] The first enable signal triggers the DC converter to enter the preset activation mode:

[0052] The charging control system sends a first enable signal EN=1, and the DC converter enters a normal working state (activation mode) after receiving the first enable signal EN=1, that is, outputs current and voltage to provide power to the entire vehicle and charges the lead-acid battery at the same time. At this time, since the DC converter simultaneously provides power to the entire vehicle and charges the lead-acid battery, its output load is large and the conversion efficiency is high.

[0053] The second enable signal triggers the DC converter to enter the preset standby mode:

[0054] The charging control system sends a second enable signal EN = 0, and the DC converter enters the standby state (standby mode) after receiving the second enable signal EN = 0, that is, stops outputting current and voltage to the outside; at this time, the lead-acid battery discharges to the outside to provide power for the whole vehicle. In this mode, the DC converter does not work, so there is no need to calculate its conversion efficiency.

[0055] The above two mode designs enable electric vehicles to intelligently manage their power systems, ensuring that the enable signal can be reasonably adjusted under different working conditions, thereby extending battery life and improving energy efficiency. The charging control system can integrate battery power information and complex power demand information of the entire vehicle, automatically respond to different power requirements and battery status, and make decisions to output different target enable signals, thereby ensuring a balance between safety and performance. And because it adopts a periodic continuous monitoring and feedback mechanism, the device can effectively prevent excessive discharge of the battery while ensuring its operating capacity under high load conditions. The feedback mechanism mentioned here, in other embodiments of the present application, can also include: after outputting the target enable signal to the DC converter, receiving the current and voltage signal fed back by the DC converter, that is, the charging control system monitors the actual working state of the DC converter to confirm what working mode it is in or whether it is working.

[0056] The above embodiment can be further expanded to include that, in response to the current enable signal state, determining the detection order of the power demand and the power quantity and the corresponding judgment strategy includes at the beginning of each cycle detection: if the current enable signal is the first enable signal, then the power demand represented by electric power is detected first and the corresponding judgment strategy is executed; if the current enable signal is the second enable signal, then the power quantity represented by SOC is detected first and the corresponding judgment strategy is executed.

[0057] Based on this concept, the decision on whether to adjust the enable signal according to the detection order and the judgment strategy mentioned above includes: if the current enable signal is the first enable signal, then determine whether the power demand is greater than or equal to the established first power threshold; if so, maintain the output of the first enable signal; if not (that is, the demand power corresponding to the current vehicle load is less than the first power threshold), then detect whether the power is greater than the established first SOC threshold; if yes, change the first enable signal to the second enable signal and output it; if not, maintain the output of the first enable signal.

[0058] This also includes another situation, that is, if the current enable signal is the second enable signal, then determine whether the power is less than a predetermined second SOC threshold (the second SOC threshold is less than the first SOC threshold); if so, change the second enable signal to the first enable signal and output it; if not (that is, the current battery power is greater than or equal to the second SOC threshold), then detect whether the power demand is greater than a predetermined second power threshold (the second power threshold is greater than the first power threshold); if yes, change the second enable signal to the first enable signal and output it; if not, keep the second enable signal output.

[0059] Finally, it can be added that in some preferred embodiments of the present application, before entering the periodic continuous detection phase, the control method can also include: after the vehicle is powered on and completes the self-test, setting an initial enable signal; the initial enable signal is the first enable signal.

[0060] The following is a more detailed description (taking 1500W DC converter as an example, the conversion efficiency is higher above 500W), which gradually explains how to initialize after power-on, set the conditional judgment of the enable signal EN, and the entire process of periodic detection.

[0061] 1. Initialization process

[0062] Power-on startup: After the vehicle is powered on, it first enters the initialization phase. At this time, the charging control system will perform a basic self-test to ensure that all hardware components are operating normally. Set the enable signal: After the self-test is successful, the charging control system will initialize the enable signal EN to 1, so that the DC converter is ready for operation and power output.

[0063] 2. Periodic testing

[0064] Entering the monitoring loop: The charging control system enters a continuous monitoring loop, and the charging control system will periodically read the values ​​of the vehicle's power (P) and battery charge (SOC). These values ​​are critical to determining the state of the system. Detection interval: Between each detection, the charging control system will pause for a certain period of time (for example, a few seconds) to avoid reading data too frequently, which helps reduce system resource consumption and improve stability.

[0065] 3. Conditional judgment logic

[0066] In each cycle, the charging control system determines subsequent operations according to the current value of the enable signal EN.

[0067] When EN is 1, the power is detected first, and the charging control system reads the current vehicle power consumption P. Power judgment: If P>=500W, EN continues to be 1, the DC converter remains in operation, and provides normal power output; if P<500W, the charging control system then checks the battery power SOC: If SOC>80%, the battery power is sufficient, so EN is set to 0, the DC converter stops power output, prevents unnecessary energy consumption, and protects the battery; if SOC<=80%, the battery power is relatively low, EN continues to be 1, the DC converter continues to run, and provides power.

[0068] When EN is 0, the battery power is first detected, and the charging control system checks the battery power SOC value. Power judgment: If SOC < 20%, the battery power is very low, the charging control system sets EN to 1, restarts the power output to ensure that the device can continue to operate under low power conditions; if SOC >= 20%, the charging control system will further check the vehicle power consumption P: If P > 1000W, when the power consumption is high, the charging control system will set EN to 1, re-enable the device, and ensure normal operation under high load conditions; if P <= 1000W, continue to keep EN at 0, and the DC converter is in a stopped state to prevent excessive discharge of the battery.

[0069] 4. End the test and repeat the process

[0070] Wait and repeat: After each detection and judgment, the charging control system will pause according to the preset time interval. After that, the charging control system will restart the cycle and continue to monitor the vehicle's power consumption and battery level to ensure that it is always in the best working condition.

[0071] See also Figure 2 Based on the same inventive concept, the embodiment of the present application further provides a vehicle DC converter control device, the device comprising:

[0072] The cycle detection module 201 is used to intermittently detect the current enabling signal state according to a preset cycle, and obtain the power demand of the vehicle load and the power of the battery;

[0073] A detection judgment strategy determination module 202, for determining a detection order of the power demand and the power quantity and a corresponding judgment strategy in response to a current enable signal state;

[0074] An enable signal adjustment decision module 203, used to decide whether to adjust the enable signal according to the detection order and the judgment strategy;

[0075] The enable signal output module 204 is used to output a target enable signal to the DC converter based on the decision result, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode, and a second enable signal for triggering the DC converter to enter a preset standby mode.

[0076] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including at least one processor, which is used to execute a computer program stored in a memory to implement the flow chart steps of the above-mentioned automotive DC converter control method provided in an embodiment of the present application.

[0077] Optionally, the processor may specifically be a central processing unit, a specific ASIC, or one or more integrated circuits for controlling program execution.

[0078] Optionally, the electronic device may further include a memory connected to at least one processor, and the memory may include ROM, RAM, and disk storage. The memory is used to store data required by the processor when it is running, that is, it stores instructions that can be executed by at least one processor, and at least one processor executes the methods mentioned in the above embodiments by executing the instructions stored in the memory. Among them, the number of memories is one or more. Among them, the number of memories is one or more.

[0079] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer executes the methods mentioned in the above embodiments.

[0080] Based on the same inventive concept, the embodiment of the present application further provides a vehicle, comprising at least the above electronic device and / or computer-readable storage medium. The selection of the vehicle can be determined based on the correct understanding and reasonable implementation of the above solution by those skilled in the art.

[0081] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A method for controlling a DC converter of an automobile, characterized in that: The method comprises: Intermittently detect the current enabling signal status according to the preset cycle, and obtain the power demand of the vehicle load and the battery power; In response to the current state of the enable signal, determining a detection order of the power demand and the power quantity and a corresponding judgment strategy; According to the detection order and the judgment strategy, decide whether to adjust the enable signal; Based on the decision result, a target enable signal is output to the DC converter, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode and a second enable signal for triggering the DC converter to enter a preset standby mode.

2. The automotive DC converter control method according to claim 1, characterized in that: The determining of the detection order of the power demand and the power quantity and the corresponding judgment strategy in response to the current enable signal state includes at the beginning of each cycle detection: If the current enable signal is the first enable signal, the power demand represented by the electric power is detected first and a corresponding judgment strategy is executed; If the current enable signal is the second enable signal, the electrical quantity represented by the SOC is detected first and a corresponding determination strategy is executed.

3. The automotive DC converter control method according to claim 2, characterized in that: The decision of whether to adjust the enable signal according to the detection order and the judgment strategy includes: If the current enable signal is the first enable signal, determining whether the power demand is greater than or equal to a predetermined first power threshold; If the power demand is greater than or equal to a predetermined first power threshold, maintaining the output of the first enable signal; If the power demand is less than the first power threshold, detecting whether the power is greater than a predetermined first SOC threshold; If the electric quantity is greater than the first SOC threshold, the first enable signal is changed into a second enable signal and outputted; If the electric quantity is less than or equal to the first SOC threshold, the first enable signal is kept output.

4. The automotive DC converter control method according to claim 2, characterized in that: The decision of whether to adjust the enable signal according to the detection order and the judgment strategy includes: If the current enable signal is the second enable signal, determining whether the power is less than a predetermined second SOC threshold; If the electric quantity is less than the second SOC threshold, the second enable signal is changed into the first enable signal and outputted; If the power level is greater than or equal to a second SOC threshold, detecting whether the power demand is greater than a predetermined second power threshold; If the power demand is greater than the second power threshold, the second enable signal is changed into the first enable signal and outputted; If the power demand is less than or equal to the second power threshold, the second enable signal is kept output.

5. The automotive DC converter control method according to claim 1, characterized in that: The control method further includes: after outputting the target enable signal to the DC converter, receiving a current or voltage signal fed back by the DC converter for determining the working state of the DC converter.

6. The automotive DC converter control method according to any one of claims 1 to 5, characterized in that: Before entering the periodic continuous detection phase, the control method may further include: after the vehicle is powered on and completes the self-test, setting an initial enable signal; the initial enable signal is a first enable signal.

7. A vehicle DC converter control device, characterized in that: The device comprises: The cycle detection module is used to intermittently detect the current enable signal status according to a preset cycle and obtain the power demand of the vehicle load and the battery power; A detection judgment strategy determination module, used to determine the detection order of the power demand and the power quantity and the corresponding judgment strategy in response to the current enable signal state; An enable signal adjustment decision module, used to decide whether to adjust the enable signal according to the detection order and the judgment strategy; An enable signal output module is used to output a target enable signal to the DC converter based on the decision result, wherein the target enable signal includes a first enable signal for triggering the DC converter to enter a preset activation mode, and a second enable signal for triggering the DC converter to enter a preset standby mode.

8. An electronic device, characterized in that: include: One or more processors, a memory and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the electronic device, the electronic device executes the automotive DC converter control method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the automobile DC converter control method according to any one of claims 1 to 6 is implemented.

10. A vehicle, characterized in that: The vehicle is provided with the electronic device of claim 8 or the computer-readable storage medium of claim 9.

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