Vehicle lamp derating method and device, vehicle, medium and program product

Abstract

The invention relates to the technical field of vehicle lamp derating, in particular to a vehicle lamp derating method and device, a vehicle, a medium and a program product, and the method comprises the steps that based on the current working condition, the positive electrode voltage value, the internal negative temperature coefficient voltage value and the external negative temperature coefficient voltage value of a storage battery of a vehicle lamp are obtained; and determining a final current share value of the vehicle lamp based on a first current share value corresponding to the storage battery positive electrode voltage value, a second current share value corresponding to the internal negative temperature coefficient voltage value and a third current share value corresponding to the external negative temperature coefficient voltage value, and derating to the final current share value. Therefore, the problems that in the related technology, a hardware implementation scheme needs additional hardware resources and is relatively difficult to modify, and a software implementation scheme needs higher processor speed and larger memory capacity, so that the two technical schemes are poor in flexibility and response speed, and the hardware implementation scheme cannot be modified easily are solved. And the vehicle lamp performance requirements in different use scenes cannot be met.

Description

Technical Field

[0001] This application relates to the technical field of headlight derating, and particularly relates to a headlight derating method, device, vehicle, medium and program product. Background Art

[0002] With the rapid development of the vehicle industry, as an important component, the performance and safety of headlights have been increasingly emphasized. Headlights not only provide lighting and signal indication for drivers, but also directly affect driving safety and the appearance design of vehicles. However, a large amount of heat is generated during the operation of headlights. If effective heat dissipation cannot be achieved, it will lead to a decline in headlight performance and even cause failures.

[0003] In the related art, in terms of dynamically and stably reducing the current of headlights, it can mainly be solved through software implementation solutions and hardware implementation solutions. Among them, the hardware implementation solution adjusts the output dimming current by adjusting the voltage division ratio of the constant current output terminal through a hardware circuit, and the software implementation solution is achieved by adjusting the output current according to the differences in the algorithm end. Specifically, the software implementation solution can, based on derating data and actual derating data, through complex calculations and analyses, accurately predict and determine the next derating time and the corresponding derating method to ensure stable current derating while maintaining efficient lighting of the headlights; while the hardware implementation solution more relies on the optimized design of the headlight heat dissipation system. This system usually consists of key components such as a circuit board, a light source, a radiator, a reflector, an air duct baffle, and a air supply device. By optimizing the structure and performance of the heat dissipation system, it provides strong support for the stable derating of the current.

[0004] However, in the related art, the hardware implementation solution requires additional hardware resources and is relatively difficult to modify once determined. The software implementation solution requires a higher processor speed and a larger memory capacity when dealing with high-speed or high-load tasks, increasing the difficulty of development and maintenance, resulting in poor flexibility and response speed and being unable to meet the headlight performance requirements in different usage scenarios, thus urgent improvement is needed. Summary of the Invention

[0005] This application provides a headlight derating method, device, vehicle, medium and program product to solve the problems in the related art that the hardware implementation solution requires additional hardware resources and is relatively difficult to modify, and the software implementation solution requires a higher processor speed and a larger memory capacity, resulting in poor flexibility and response speed of these two technical solutions and being unable to meet the headlight performance requirements in different usage scenarios.

[0006] The first aspect of the present application provides a method for derating a vehicle lamp, including the following steps: detecting the current working condition of the vehicle lamp; obtaining at least one of the battery positive voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp based on the current working condition; determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the battery positive voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, and derating the current value of the vehicle lamp to the final current share value.

[0007] Through the above technical solution, according to the current working condition of the vehicle lamp, the battery positive voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp can be obtained. Then, the final current share value of the vehicle lamp is determined by using different current share values, and the current value of the vehicle lamp is derated to the final current share value to complete the derating of the vehicle lamp. It can achieve precise derating of the vehicle lamp current, help prevent the vehicle lamp from being damaged due to excessive current, ensure that the vehicle lamp can work stably under various working conditions, extend the service life of the vehicle lamp, and perform dynamic adjustment according to the working condition of the vehicle lamp. This not only improves the lighting effect of the vehicle lamp but also enhances the driving experience of users and improves driving safety.

[0008] Optionally, in an embodiment of the present application, the derating the current value of the vehicle lamp to the final current share value includes: obtaining the resistance value corresponding to the vehicle lamp; determining the current value of the vehicle lamp by using the resistance value; reducing the current value at a preset derating rate or a preset derating step until the final current share value is reached.

[0009] Through the above technical solution, the current value of the vehicle lamp can be determined according to the resistance value corresponding to the vehicle lamp, and the current value is reduced according to certain current reduction conditions until the final current share value is reached. Based on the accurate calculation of the resistance value, the derating process can be precisely controlled, avoiding the impact on the vehicle lamp caused by sudden changes in the current value and extending its service life. Flexibly setting certain current reduction conditions according to the actual working conditions and requirements of the vehicle lamp helps improve the efficiency and accuracy of derating and maintain the stable lighting effect of the vehicle lamp under various working conditions, thereby improving driving safety.

[0010] Optionally, in an embodiment of the present application, before determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, it further includes: determining whether at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value is in the corresponding derating range; if the positive battery voltage value is in the derating range, determining the first current share value as a first preset current share value according to the derating range, otherwise, determining the first current share value as a first target current share value according to the target current fraction, where the target current fraction is obtained by equally dividing the current value according to the target current share value; if the internal negative temperature coefficient voltage value is in the derating range, determining the second current share value as a second preset current share value according to the derating range, otherwise, determining the second current share value as a second target current share value according to the target current fraction; if the external negative temperature coefficient voltage value is in the derating range, determining the third current share value as a third preset current share value according to the derating range, otherwise, determining the third current share value as a third target current share value according to the target current fraction.

[0011] Through the above technical solution, the value of the current share can be determined according to the relationship between the positive battery voltage value, the internal negative temperature coefficient voltage value, the external negative temperature coefficient voltage value, and the derating range, making the current control more precise, capable of adapting to voltage changes under different working conditions, thereby improving the flexibility and adaptability of the current control, and enhancing the stability and reliability of the system.

[0012] Optionally, in an embodiment of the present application, determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value includes: comparing the magnitudes of the first current share value, the second current share value, and the third current share value; determining the final current share value according to the comparison result.

[0013] Through the above technical solution, the final current share value can be determined by comparing the magnitudes of the first current share value, the second current share value, and the third current share value. By comprehensively considering multiple factors such as the positive electrode voltage of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage, and comparing their corresponding current share values, it is possible to more comprehensively reflect the current working state and requirements of the vehicle lamp, avoid errors caused by a single factor, improve the accuracy and rationality of current control, and promptly detect and handle potential faults or abnormal conditions, thereby enhancing the robustness and stability of the system.

[0014] Optionally, in an embodiment of the present application, before reducing the current value of the vehicle lamp to the final current share value, it further includes: obtaining the truth table corresponding to the vehicle lamp; based on the truth table and the current working condition, determining whether the working state of the vehicle lamp is a normal working state; if the working state is the normal working state, allowing the current reduction operation to be performed according to the final current share value; if the working state is not the normal working state, not allowing the current reduction operation to be performed according to the final current share value.

[0015] Through the above technical solution, the working state of the vehicle lamp can be determined according to the truth table corresponding to the vehicle lamp, and in the normal working state, the current reduction operation is performed, while in the non-normal working state, the current reduction operation is not performed. This can accurately determine the working state of the vehicle lamp, ensure the accuracy and reliability of the determination result, avoid unnecessary operations caused by misjudgment, improve the overall performance and stability of the system, avoid the risks that may be brought by performing the current reduction operation when the vehicle lamp is in an abnormal working state, and improve the energy utilization efficiency.

[0016] Optionally, in an embodiment of the present application, the obtaining at least one of the positive electrode voltage value of the storage battery of the vehicle lamp, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value based on the current working condition includes: based on the current working condition, determining the acquisition time for obtaining at least one of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value; based on the acquisition time, periodically obtaining at least one of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value.

[0017] Through the above technical solution, the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value can be periodically obtained, and the acquisition time of the voltage value is determined based on the current working condition, which can ensure data acquisition at an appropriate time, ensure the timeliness of the data, improve the accuracy and reliability of the data, reduce unnecessary acquisitions, lower energy consumption and costs, and improve the processing efficiency.

[0018] In the second aspect of the present application, an embodiment provides a headlight derating device, including: a detection module for detecting the current working condition of the headlight; a first acquisition module for acquiring at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight based on the current working condition; a derating module for determining the final current share value of the headlight based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, and derating the current value of the headlight to the final current share value.

[0019] Through the above technical solution, the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight can be acquired according to the current working condition of the headlight, and then the final current share value of the headlight can be determined by using different current share values, and the current value of the headlight can be derated to the final current share value to complete the derating of the headlight, which can achieve precise derating of the headlight current, help prevent the headlight from being damaged due to excessive current, ensure that the headlight can work stably under various working conditions, extend the service life of the headlight, and perform dynamic adjustment according to the working condition of the headlight, not only improving the lighting effect of the headlight, but also enhancing the driving experience of users and improving driving safety.

[0020] Optionally, in an embodiment of the present application, the derating module includes: a first acquisition unit for acquiring the resistance value corresponding to the headlight; a first determination unit for determining the current value of the headlight by using the resistance value; a derating unit for reducing the current value at a preset derating rate or a preset derating step until the final current share value is reached.

[0021] Through the above technical solution, the current value of the headlight can be determined according to the resistance value corresponding to the headlight, and the current value can be reduced under certain current reduction conditions until the final current share value is reached. Based on the accurate calculation of the resistance value, the derating process can be precisely controlled, avoiding the impact on the headlight caused by sudden changes in the current value, extending its service life, and flexibly setting certain current reduction conditions according to the actual working conditions and requirements of the headlight, which helps to improve the efficiency and accuracy of derating, maintain the stable lighting effect of the headlight under various working conditions, and thus improve driving safety.

[0022] Optionally, in an embodiment of the present application, it further includes: a first determination module, configured to determine whether at least one of the battery positive voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value is in a corresponding derating range before determining the final current share value of the headlight based on at least one of the first current share value corresponding to the battery positive voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value; a first generation module, configured to, when the battery positive voltage value is in the derating range, determine the first current share value as a first preset current share value according to the derating range, otherwise, determine the first current share value as a first target current share value according to the target current number of shares, where the target current number of shares is obtained by equally dividing the current value according to the target current share value; a second generation module, configured to, when the internal negative temperature coefficient voltage value is in the derating range, determine the second current share value as a second preset current share value according to the derating range, otherwise, determine the second current share value as a second target current share value according to the target current number of shares; a third generation module, configured to, when the external negative temperature coefficient voltage value is in the derating range, determine the third current share value as a third preset current share value according to the derating range, otherwise, determine the third current share value as a third target current share value according to the target current number of shares.

[0023] Through the above technical solution, the value of the current share value can be determined according to the relationship between the battery positive voltage value, the internal negative temperature coefficient voltage value, the external negative temperature coefficient voltage value, and the derating range, making the current control more precise, capable of adapting to voltage changes under different working conditions, thereby improving the flexibility and adaptability of the current control, and enhancing the stability and reliability of the system.

[0024] Optionally, in an embodiment of the present application, the derating module includes: a comparison unit, configured to compare the magnitudes of the first current share value, the second current share value, and the third current share value; a second determination unit, configured to determine the final current share value according to the comparison result.

[0025] Through the above technical solution, the final current share value can be determined by comparing the magnitudes of the first current share value, the second current share value, and the third current share value, comprehensively considering multiple factors such as the battery positive voltage, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage, and comparing the corresponding current share values, which can more comprehensively reflect the current working state and requirements of the headlight, avoid errors caused by a single factor, improve the accuracy and rationality of the current control, and timely detect and handle potential faults or abnormal conditions, improving the robustness and stability of the system.

[0026] Optionally, in an embodiment of the present application, it further includes: a second acquisition module, configured to acquire the truth table corresponding to the vehicle lamp before reducing the current value of the vehicle lamp to the final current share value; a second judgment module, configured to judge whether the working state of the vehicle lamp is a normal working state based on the truth table and the current working condition; a first execution module, configured to allow the current reduction operation to be performed according to the final current share value when the working state is the normal working state; a second execution module, configured to not allow the current reduction operation to be performed according to the final current share value when the working state is not the normal working state.

[0027] Through the above technical solution, the working state of the vehicle lamp can be judged according to the truth table corresponding to the vehicle lamp, and the current reduction operation is performed when it is in the normal working state, and the current reduction operation is not performed when it is not in the normal working state. The working state of the vehicle lamp can be accurately judged, ensuring the accuracy and reliability of the judgment result, avoiding unnecessary operations caused by misjudgment, improving the overall performance and stability of the system, avoiding the risks that may be brought by performing the current reduction operation when the vehicle lamp is in an abnormal working state, and improving the energy utilization efficiency.

[0028] Optionally, in an embodiment of the present application, the first acquisition module includes: a third determination unit, configured to determine the acquisition time of at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value based on the current working condition; a second acquisition unit, configured to periodically acquire at least one of the positive battery voltage value, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value based on the acquisition time.

[0029] Through the above technical solution, the positive battery voltage value, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value can be periodically acquired, and the acquisition time of the voltage value is determined based on the current working condition, which can ensure data acquisition at an appropriate time, ensure the timeliness of the data, improve the accuracy and reliability of the data, reduce unnecessary acquisitions, reduce energy consumption and costs, and improve the processing efficiency.

[0030] An embodiment of the third aspect of the present application provides a vehicle, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the vehicle lamp current reduction method as described in the above embodiment.

[0031] An embodiment of the fourth aspect of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program, and when the program is executed by a processor, it implements the above vehicle lamp current reduction method.

[0032] A computer program product according to an embodiment of the fifth aspect of the present application includes a computer program which, when executed, implements the above-mentioned headlight derating method.

[0033] Embodiments of the present application can obtain the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight according to the current operating condition of the headlight, and then use different current share values to determine the final current share value of the headlight, and derate the current value of the headlight to the final current share value to complete the derating of the headlight, which can achieve precise derating of the headlight current, help prevent the headlight from being damaged due to excessive current, ensure that the headlight can work stably under various operating conditions, extend the service life of the headlight, and dynamically adjust according to the operating condition of the headlight, which not only improves the lighting effect of the headlight, but also enhances the driving experience of the user and improves driving safety. Thus, the problems in the related art are solved. In the hardware implementation solution, additional hardware resources are required and it is relatively difficult to modify. In the software implementation solution, higher processor speed and larger memory capacity are required, resulting in poor performance in terms of flexibility and response speed for these two technical solutions and inability to meet the headlight performance requirements in different usage scenarios.

[0034] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0036] Figure 1 is a hardware schematic diagram of a derating scheme in the related art;

[0037] Figure 2 is a flowchart of the working principle of a derating scheme in the related art;

[0038] Figure 3 is a hardware schematic diagram of a derating scheme in the related art;

[0039] Figure 4 is a block schematic diagram of a headlight drive system according to an embodiment of the present application;

[0040] Figure 5 is a flowchart of a headlight derating method according to an embodiment of the present application;

[0041] Figure 6 is a flowchart of the current share value according to an embodiment of the present application;

[0042] Figure 7A flowchart of the working principle of the headlight derating method provided according to an embodiment of the present application;

[0043] Figure 8 A logical schematic diagram of the working principle of the headlight derating method provided according to an embodiment of the present application;

[0044] Figure 9 A block schematic diagram of a derating curve provided according to an embodiment of the present application;

[0045] Figure 10 A block schematic diagram of the headlight derating device provided according to an embodiment of the present application;

[0046] Figure 11 A structural schematic diagram of a vehicle provided according to an embodiment of the present application. Detailed implementation manners

[0047] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, but should not be construed as a limitation to the present application.

[0048] The headlight derating method, device, vehicle, medium and program product of the embodiments of the present application will be described below with reference to the accompanying drawings. In view of the problem that the hardware implementation solution mentioned in the above background technology requires additional hardware resources and is relatively difficult to modify, and the software implementation solution requires a higher processor speed and a larger memory capacity, resulting in poor flexibility and response speed of these two technical solutions and unable to meet the headlight performance requirements in different usage scenarios, the present application provides a headlight derating method. In this method, the positive battery voltage value, the internal negative temperature coefficient voltage value and the external negative temperature coefficient voltage value of the headlight can be obtained according to the current working condition of the headlight, and then the final current share value of the headlight can be determined by using different current share values, and the current value of the headlight can be derated to the final current share value to complete the derating of the headlight, which can achieve accurate derating of the headlight current, help prevent the headlight from being damaged due to excessive current, ensure the stable operation of the headlight under various working conditions, extend the service life of the headlight, and perform dynamic adjustment according to the working condition of the headlight, which not only improves the lighting effect of the headlight, but also enhances the driving experience of the user and improves driving safety. Thus, the problems in the related technology that the hardware implementation solution requires additional hardware resources and is relatively difficult to modify, and the software implementation solution requires a higher processor speed and a larger memory capacity, resulting in poor flexibility and response speed of these two technical solutions and unable to meet the headlight performance requirements in different usage scenarios are solved.

[0049] Before introducing the headlight derating method proposed in the embodiments of the present application, other derating solutions will be briefly introduced first.

[0050] Solution 1:

[0051] Specifically, Figure 1 It is a hardware schematic diagram of a derating solution in the related art.

[0052] As Figure 1 shown, the headlight drive system 10 may but is not limited to include a BUCK (Buck Converter) constant current drive module 101, an MCU (Microcontroller Unit) 102, an internal power supply LDO (Low Dropout Regulator) 103, an internal negative temperature coefficient 104, and a light source board 105.

[0053] Furthermore, the embodiments of the present application will introduce the working principle of the headlight drive system in combination with Figure 2 shown.

[0054] Among them, Figure 2 It is a flowchart of the working principle of a derating solution in the related art.

[0055] Step S201: Set the parameters of the headlight heat dissipation system and calibrate the standard derating data of the headlight according to the initial state of the headlight.

[0056] Step S202: Count the number of times the headlight heat dissipation system is triggered to derate the headlight temperature within a single ignition cycle, and record the actual derating data each time the headlight is triggered to derate.

[0057] Step S203: Calculate the next derating time and derating method according to the standard derating data and actual derating data of the headlight.

[0058] Step S204: Continuously adjust the derating method of the headlight according to the change trend of the derating slope during the derating process and the change of the headlight temperature.

[0059] Step S205: The headlight heat dissipation system derates the headlight according to the adjusted derating method.

[0060] Solution 2:

[0061] Specifically, Figure 3 It is a hardware schematic diagram of a derating solution in the related art.

[0062] As Figure 3As shown, the headlight driving system 30 may but is not limited to include a BUCK constant current driving module 301, an MCU 302, an internal power supply LDO 303, and a light source board 304.

[0063] Further, in the embodiment of the present application, the working principle of the headlight driving system 30 is as follows: the MCU 302 collects the output enables of different channels corresponding to the headlights, and through cooperation with external resistors for adjustment, the purpose of modifying the output current is achieved, thereby realizing the hardware derating of the corresponding channels.

[0064] Before introducing the headlight derating method mentioned in the embodiment of the present application, the headlight driving system involved in the embodiment of the present application will be introduced first.

[0065] Next, in conjunction with Figure 4 As shown, the headlight driving system involved in the embodiment of the present application will be introduced.

[0066] Among them, Figure 4 is a block diagram of a headlight driving system provided according to an embodiment of the present application.

[0067] As Figure 4 shown, the headlight driving system 40 may but is not limited to include a BUCK constant current driving module 401, an MCU 402, an internal power supply LDO 403, an internal negative temperature coefficient and an external negative temperature coefficient 404, and a light source board 405.

[0068] Among them, the BUCK constant current driving module 401 is used to provide a stable current output to ensure that the input voltage is converted into a stable output current.

[0069] The MCU 402 is used to receive various sensor signals from the vehicle (such as a light sensor, a vehicle speed sensor, etc., which are not specifically limited in the present application), and process them according to the preset program logic to realize functions such as automatic switching and brightness adjustment of the headlights.

[0070] The internal power supply LDO 403 is used to provide a stable low-voltage power supply to ensure that each circuit module can work properly.

[0071] The internal negative temperature coefficient and the external negative temperature coefficient 404 are used to be installed at key parts of the LED (Light Emitting Diode) headlights or the driving circuit to monitor the working temperature in real time.

[0072] The light source board 405 includes LEDs, negative temperature coefficient resistors, etc., which are not specifically limited in the present application, and is used to convert electrical energy into light energy.

[0073] In addition, in the embodiments of the present application, voltage monitoring is performed through AD sampling (Analog-to-Digital Sampling). Since the BUCK constant current driving module 401 is a buck constant current, when the voltage of the positive pole of the power supply battery drops, the load current will increase. The increase in power will cause the temperature of the BUCK chip to rise rapidly. When lighting the lamp under the condition of low voltage for a long time (when the battery is almost out of power), the chip temperature may exceed 145 degrees Celsius, exceeding the safe junction temperature of the chip, which may cause the chip to burn out and be unable to drive the LED, and then lose the lighting function, bringing driving risks.

[0074] Based on the above problems of the vehicle lamp driving system, the present application proposes a vehicle lamp derating method. The vehicle lamp derating method mentioned in the embodiments of the present application will be introduced in detail below.

[0075] Specifically, Figure 5 FIG. is a flowchart of a vehicle lamp derating method provided according to an embodiment of the present application.

[0076] As Figure 5 shown, the vehicle lamp derating method includes the following steps:

[0077] In step S501, detect the current working condition of the vehicle lamp.

[0078] It can be understood that in the embodiments of the present application, the vehicle lamp may include, but is not limited to, low beam, high beam, turn signal, position lamp, daytime running lamp, etc. Specifically, it can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0079] Furthermore, the current working condition of the vehicle lamp in the embodiments of the present application may include, but is not limited to, working state, vehicle lamp operating parameters, vehicle lamp operating environment, etc. The present application does not make specific limitations.

[0080] Among them, the working state may include, but is not limited to, normal working state, shutdown working state, standby working state, fault working state, etc. The present application does not make specific limitations.

[0081] The vehicle lamp operating parameters may include, but are not limited to, internal temperature, internal pressure, etc. The present application does not make specific limitations.

[0082] The vehicle lamp operating environment may include, but is not limited to, external temperature, external altitude, etc. The present application does not make specific limitations.

[0083] In addition, it should be noted that the method for detecting the current working condition of the vehicle lamp in the embodiments of the present application may include, but is not limited to, visual inspection, instrument inspection, function inspection, etc. The present application does not make specific limitations.

[0084] As a possible implementation, embodiments of the present application can obtain the working state, internal temperature, external temperature, etc. of the vehicle lamp by detecting the current working condition of the vehicle lamp, and the present application does not make specific limitations.

[0085] Exemplarily, in embodiments of the present application, when the low beam and high beam switches are turned on, the working states of the low beam and high beam can be determined by observing the lighting range and brightness of the light, the internal temperature of the low beam and high beam can be determined by an internal negative temperature coefficient, and the external temperature of the low beam and high beam can be determined by an external negative temperature coefficient.

[0086] In step S502, based on the current working condition, at least one of the positive battery voltage value, internal negative temperature coefficient voltage value, and external negative temperature coefficient voltage value of the vehicle lamp is obtained.

[0087] It can be understood that the positive battery voltage value in embodiments of the present application can be understood as the power supply voltage of the battery, that is, the power supply directly led out from the positive pole of the battery, so as to provide stable low-voltage power supply for each system on the vehicle and ensure the normal operation of each system. Its voltage range can be set to 11V to 15V. However, in order to cope with overcharging and over-discharging situations, in embodiments of the present application, the voltage range of a 12V lead-acid battery can be 0V to 16V (the deviation is controlled within ±5V, and the present application does not make specific limitations), and specifically, it can be set by those skilled in the art according to actual situations, and the present application does not make specific limitations.

[0088] In addition, embodiments of the present application monitor the positive battery voltage value in real time, and when the voltage drops to a dangerous threshold, the drive of the BUCK chip is configured to derate (artificially reduce the output current) to ensure that the temperature on the drive chip does not continue to rise and to ensure the safety of the circuit.

[0089] In addition, embodiments of the present application can directly measure the positive battery voltage value with a voltmeter or an oscilloscope, or can also read the positive battery voltage value using an on-vehicle diagnostic system. Specifically, it can be set by those skilled in the art according to actual situations, and the present application does not make specific limitations.

[0090] Furthermore, in embodiments of the present application, the internal negative temperature coefficient voltage value is related to the resistance value of the internal negative temperature coefficient and changes with temperature. Among them, the internal negative temperature coefficient can be installed inside the vehicle lamp to monitor the internal temperature of the vehicle lamp, so as to trigger a protection mechanism when the temperature is too high to prevent the vehicle lamp from being damaged.

[0091] The external negative temperature coefficient voltage value is related to the resistance value of the external negative temperature coefficient and changes with temperature. Among them, the external negative temperature coefficient can be used to monitor the temperature of the vehicle lamp housing or the surrounding environment.

[0092] It should be noted that in the embodiments of the present application, the internal negative temperature coefficient voltage value can be obtained by reading the resistance value of the internal negative temperature coefficient or the corresponding temperature information, and the external negative temperature coefficient voltage value can be obtained by reading the resistance value of the external negative temperature coefficient or the corresponding temperature information. Specifically, those skilled in the art can set it according to the actual situation, and the present application does not make specific limitations.

[0093] In the actual execution process, in the embodiments of the present application, when obtaining the current working condition of the vehicle lamp, the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp can be obtained simultaneously.

[0094] Exemplarily, in the embodiments of the present application, when the low beam and high beam switches are turned on, the positive battery voltage value can be obtained in real time through a digital multimeter, the voltage value of the internal negative temperature coefficient can be obtained in real time through a digital multimeter, and then the internal negative temperature coefficient voltage value can be obtained. The voltage value of the external negative temperature coefficient can be obtained in real time through a digital multimeter, and then the external negative temperature coefficient voltage value can be obtained.

[0095] Optionally, in an embodiment of the present application, before determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, it further includes: judging whether at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value is in the corresponding derating range; if the positive battery voltage value is in the derating range, then determine the first current share value as the first preset current share value according to the derating range, otherwise, determine the first current share value as the first target current share value according to the target current number, where the target current number is obtained by equally dividing the current value according to the target current share value; if the internal negative temperature coefficient voltage value is in the derating range, then determine the second current share value as the second preset current share value according to the derating range, otherwise, determine the second current share value as the second target current share value according to the target current number; if the external negative temperature coefficient voltage value is in the derating range, then determine the third current share value as the third preset current share value according to the derating range, otherwise, determine the third current share value as the third target current share value according to the target current number.

[0096] It can be understood that in the embodiments of the present application, the derating ranges corresponding to the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value can be the same derating range or different derating ranges. Specifically, those skilled in the art can set it according to the actual situation, and the present application does not make specific limitations.

[0097] Further, in the embodiments of the present application, the determination of the derating range can be based on the rated voltage, rated current, power derating curve, ambient temperature, working load, etc. of the headlight, and the present application does not make specific limitations.

[0098] In some embodiments, the embodiments of the present application can determine whether the positive battery voltage value is within the corresponding derating range. If it is, the first current share value is determined according to the derating range, which can be the first preset current share value; if not, the first current share value is determined according to the target current number of parts, which can be the first target current share value. Among them, the target current number of parts is obtained by equally dividing the current value according to the target current share value. The first preset current share value, the first target current share value, and the target current share value can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0099] In some embodiments, the embodiments of the present application can determine whether the internal negative temperature coefficient voltage value is within the corresponding derating range. If it is, the second current share value is determined according to the derating range, which can be the second preset current share value; if not, the second current share value is determined according to the target current number of parts, which can be the second target current share value. Among them, the second preset current share value and the second target current share value can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0100] In some embodiments, the embodiments of the present application can determine whether the external negative temperature coefficient voltage value is within the corresponding derating range. If it is, the third current share value is determined according to the derating range, which can be the third preset current share value; if not, the third current share value is determined according to the target current number of parts, which can be the third target current share value. Among them, the third preset current share value and the third target current share value can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0101] Exemplarily, the process of determining the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value in the embodiments of the present application is as Figure 6 shown, and its main content is:

[0102] Step S601: Determine whether the positive battery voltage value is within the derating range.

[0103] Among them, in the embodiments of the present application, if it is, step S602 is executed; otherwise, step S603 is executed.

[0104] Step S602: Trigger the voltage derating curve and output the corresponding first preset current share value.

[0105] Step S603: Do not trigger the voltage derating curve and output the corresponding first target current share value.

[0106] Step S604: Determine whether the internal negative temperature coefficient voltage value is within the derating range.

[0107] Wherein, in the embodiment of the present application, if it is, execute Step S605, otherwise, execute Step S606.

[0108] Step S605: Trigger the voltage derating curve and output the corresponding second preset current share value.

[0109] Step S606: Do not trigger the voltage derating curve and output the corresponding second target current share value.

[0110] Step S607: Combine the headlight information filtered by the truth table and determine whether the external negative temperature coefficient voltage value is within the derating range.

[0111] Wherein, in the embodiment of the present application, if it is, execute Step S608, otherwise, execute Step S609.

[0112] Step S608: Trigger the voltage derating curve and output the corresponding third preset current share value.

[0113] Step S609: Do not trigger the voltage derating curve and output the corresponding third target current share value.

[0114] Step S610: Arbitrate the three curves of the battery positive voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value, select the most severe working condition curve, and output the final current share value.

[0115] In Step S503, based on at least one of the first current share value corresponding to the battery positive voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, determine the final current share value of the headlight, and derate the current value of the headlight to the final current share value.

[0116] It can be understood that the first current share value, the second current share value, and the third current share value can be understood as the current share that the headlight should receive under different voltage conditions. In order to ensure that the headlight works at a safe temperature, the embodiment of the present application can adjust the working current share value of the headlight through the final current share value, thereby reducing the working current of the headlight, achieving headlight derating, reducing headlight heat generation, and extending the service life.

[0117] As a possible implementation manner, embodiments of the present application may determine the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive electrode voltage value of the storage battery, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, and derate the current value of the vehicle lamp to the final current share value.

[0118] Exemplarily, embodiments of the present application may map the curves of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value through a software algorithm. After mapping the current corresponding to the final current share value, check the current output, and approximate the final current share value at a certain derating rate and step size until the final current share value is reached, so as to achieve dynamic arbitration derating. Among them, a certain derating rate and step size can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0119] Optionally, in an embodiment of the present application, determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive electrode voltage value of the storage battery, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value includes: comparing the magnitudes of the first current share value, the second current share value, and the third current share value; determining the final current share value according to the comparison result.

[0120] It can be seen from the above analysis that in embodiments of the present application, the most severe working condition curve can be determined by comparing the magnitudes of the first current share value, the second current share value, and the third current share value, and then the final current share value is determined according to the comparison result.

[0121] Exemplarily, if the first current share value in embodiments of the present application is 30%, the second current share value is 50%, and the third current share value is 70%, it can be determined that the curve corresponding to the positive electrode voltage value of the storage battery is the most severe working condition curve, and the final current share value is determined to be the first current share value.

[0122] Optionally, in an embodiment of the present application, obtaining at least one of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp based on the current working condition includes: determining the acquisition time for obtaining at least one of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value based on the current working condition; periodically obtaining at least one of the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value based on the acquisition time.

[0123] It can be understood that in the embodiments of the present application, the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value can be obtained periodically. Herein, "periodically" can be understood as obtaining the positive electrode voltage value of the storage battery, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value again every acquisition time period. Among them, the periodic acquisition time can be determined according to the current working condition, and specifically can be set by those skilled in the art according to the actual situation. The present application does not make specific limitations.

[0124] For example, in the current working condition, if both the internal environmental temperature and the external environmental temperature of the vehicle lamp are relatively high, the embodiments of the present application can appropriately shorten the acquisition time, such as 3 ms; if both the internal environmental temperature and the external environmental temperature of the vehicle lamp are relatively low, the embodiments of the present application can appropriately increase the acquisition time, such as 10 ms.

[0125] Optionally, in an embodiment of the present application, before reducing the current value of the vehicle lamp to the final current share value, it further includes: obtaining the truth table corresponding to the vehicle lamp; based on the truth table and the current working condition, determining whether the working state of the vehicle lamp is a normal working state; if the working state is a normal working state, allowing the current reduction operation to be performed according to the final current share value; if the working state is not a normal working state, not allowing the current reduction operation to be performed according to the final current share value.

[0126] It can be understood that in the embodiments of the present application, the truth tables of different vehicle models may be somewhat different. Therefore, the embodiments of the present application can obtain the truth table corresponding to the vehicle lamp according to different vehicle models. Among them, the truth table is a logic table used to represent the output values of a logical expression under all possible input combinations, thereby describing the working state of the vehicle lamp under different working conditions.

[0127] In some embodiments, the embodiments of the present application can determine whether the working state of the vehicle lamp is a normal working state by obtaining the truth table corresponding to the vehicle lamp and the current working condition. In the case of a normal working state, allowing the current reduction operation to be performed according to the final current share value; otherwise, not allowing the current reduction operation to be performed according to the final current share value.

[0128] Exemplarily, the embodiments of the present application collect the signals of the low beam lamp, high beam lamp, turn signal lamp, position lamp, daytime running lamp, etc., and confirm the vehicle lamps in the normal working state through truth table filtering. The result can be a combined result of the low beam lamp, high beam lamp, turn signal lamp, position lamp, daytime running lamp.

[0129] Optionally, in an embodiment of the present application, reducing the current value of the vehicle lamp to the final current share value includes: obtaining the resistance value corresponding to the vehicle lamp; using the resistance value to determine the current value of the vehicle lamp; reducing the current value according to a preset current reduction rate or a preset current reduction step until the final current share value is reached.

[0130] It can be understood that in the embodiments of the present application, the resistance value can be a binary-coded resistance value. Among them, the meaning of the binary-coded resistance value can be: the production of LEDs is to peel off countless small wafers from a large 12-inch wafer. Due to the current production process and cost limitations of LEDs, it is impossible to achieve complete consistency, which will result in wafers produced from the same wafer having a deviation in drive current to achieve the same color gamut. However, since it is impossible to ensure that the drive current of each batch of LEDs is the same, binary coding is used for distinction.

[0131] In addition, in order not to waste and ensure supply, LED manufacturers select the wafers that meet the vehicle temperature conditions here, with a target color gamut, and then conduct automated tests one by one through equipment to try different currents to achieve the same target color gamut, and divide the LEDs into several different current batches. The naming of this batch distinction is binary coding. In this way, the drive current of each batch of supplied LEDs may be different. Among them, the specification will mention how many binary codings an LED has, that is, how many batches it is divided into. Therefore, the embodiments of the present application can combine the resistance value to determine the current value of the vehicle lamp.

[0132] In the actual execution process, the embodiments of the present application can use the resistance value corresponding to the vehicle lamp to determine the current value of the vehicle lamp, and reduce the current value at a certain derating rate or a certain derating step until it is derated to the final current share value. Among them, a certain derating rate or a certain derating step can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0133] Exemplarily, the embodiments of the present application can collect the binary-coded resistance value after the vehicle lamp is powered on, confirm the current value of the corresponding vehicle lamp, and equally divide the current value of the vehicle lamp into target current share values, such as 100 parts or an integer multiple of 100. Specifically, it can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0134] For example, the low beam is powered by channel 1, the high beam is powered by channel 2, the turn signal is powered by channel 3, and the position lamp is powered by channel 4. The embodiments of the present application can equally divide the current value of channel 1 into 100 parts, the current value of channel 2 into 200 parts, the current value of channel 3 into 100 parts, and the current value of channel 4 into 100 parts through the binary-coded resistance values corresponding to different channels. In the case where channel 2 needs to be derated, the current value corresponding to channel 2 is reduced at a derating rate of one part every 2 seconds until the final target share is reached.

[0135] The working principle of the headlight derating method proposed in the embodiments of the present application will be introduced below in combination with multiple embodiments.

[0136] Embodiment 1:

[0137] Among them, Figure 7 is a flowchart of the working principle of the headlight derating method provided according to an embodiment of the present application.

[0138] Step S701: After the headlight is powered on, detect the resistance value to determine the current value of the headlight, and equally divide it into the target current share value.

[0139] Step S702: Periodically collect the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value.

[0140] Step S703: Determine whether the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value are in the corresponding derating intervals, and derate only in the derating intervals.

[0141] Among them, the embodiments of the present application are combined with Figure 6 , if the positive battery voltage value is in the derating interval, trigger the voltage derating curve and output the first preset current share value; if not, do not trigger the voltage derating curve and output the first target current share value; if the internal negative temperature coefficient voltage value is in the derating interval, trigger the voltage derating curve and output the second preset current share value; if not, do not trigger the voltage derating curve and output the second target current share value; if the external negative temperature coefficient voltage value is in the derating interval, trigger the voltage derating curve and output the third preset current share value; if not, do not trigger the voltage derating curve and output the third target current share value.

[0142] Step S704: Combine the headlight information filtered by the truth table to determine whether the voltage derating curve is triggered.

[0143] Step S705: Arbitrate the three curves of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value, select the most severe operating condition curve, and output the final current share value.

[0144] Among them, the embodiments of the present application determine the final current share value by comparing the magnitudes of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value.

[0145] Exemplarily, in the embodiment of the present application, the first current share value is 30%, the second current share value is 50%, and the third current share value is 70%. Then, the curve corresponding to the positive voltage value of the storage battery can be determined as the most severe working condition curve, and the final current share value is determined as the first current share value.

[0146] Step S706: According to the final current share value, through the mapping algorithm, make the current value approach the current value corresponding to the final current share value according to a certain current reduction condition.

[0147] Embodiment 2:

[0148] Among them, Figure 8 is a logical schematic diagram of the working principle of the headlight derating method provided according to an embodiment of the present application.

[0149] Step S801: The controller is powered on.

[0150] Step S802: The controller is initialized.

[0151] Step S803: Determine the current value of the headlight by detecting the resistance value.

[0152] Step S804: Periodically collect the positive voltage value of the storage battery, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value.

[0153] Step S805: Determine whether it is in the derating range.

[0154] Among them, if it is in the derating range, execute Step S807; otherwise, execute Step S806.

[0155] Step S806: Turn off the light.

[0156] Step S807: Filter the headlight information through the truth table.

[0157] Step S808: Determine whether the voltage derating curve is triggered.

[0158] Among them, in the embodiment of the present application, a schematic diagram of a derating curve is as Figure 9 shown.

[0159] Step S809: Arbitrate the voltage curve.

[0160] Step S810: Output the final current share value.

[0161] Step S811: Through the mapping algorithm, make the current value approach the current value corresponding to the final current share value according to a certain current reduction condition.

[0162] In summary, the embodiments of the present application can periodically collect the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value in real time. After filtering through the truth table and curve arbitration, the drive current of the corresponding load is adjusted, and the detection and arbitration adjustment are repeated to achieve dynamic derating.

[0163] According to the headlight derating method proposed by the embodiments of the present application, the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight can be obtained according to the current working condition of the headlight. Furthermore, the final current share value of the headlight is determined by using different current share values, and the current value of the headlight is derated to the final current share value to complete the derating of the headlight. It can achieve precise derating of the headlight current, help prevent the headlight from being damaged due to excessive current, ensure that the headlight can work stably under various working conditions, extend the service life of the headlight, and perform dynamic adjustment according to the working condition of the headlight. This not only improves the lighting effect of the headlight, but also enhances the driving experience of the user and improves driving safety. Thus, in the related art, the hardware implementation solution requires additional hardware resources and is relatively difficult to modify, and the software implementation solution requires higher processor speed and larger memory capacity, resulting in poor performance in terms of flexibility and response speed for these two technical solutions and being unable to meet the headlight performance requirements in different usage scenarios and other problems are solved.

[0164] Next, a headlight derating device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0165] Figure 10 It is a block diagram of a headlight derating device provided according to an embodiment of the present application.

[0166] As Figure 10 shown, the headlight derating device 100 includes: a detection module 1001, a first acquisition module 1002, and a derating module 1003.

[0167] Among them, the detection module 1001 is used to detect the current working condition of the headlight.

[0168] The first acquisition module 1002 is used to acquire at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight based on the current working condition.

[0169] The derating module 1003 is used to determine the final current share value of the headlight based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, and derate the current value of the headlight to the final current share value.

[0170] Optionally, in an embodiment of the present application, the derating module 1003 includes: a first acquisition unit, a first determination unit, and a derating unit.

[0171] Among them, the first acquisition unit is configured to acquire the resistance value corresponding to the vehicle lamp.

[0172] The first determination unit is configured to determine the current value of the vehicle lamp by using the resistance value.

[0173] The derating unit is configured to reduce the current value at a preset derating rate or a preset derating step until the final current share value is reached.

[0174] Optionally, in an embodiment of the present application, it further includes: a first judgment module, a first generation module, a second generation module, and a third generation module.

[0175] Among them, the first judgment module is configured to judge whether at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value is in the corresponding derating range before determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value.

[0176] The first generation module is configured to, when the positive battery voltage value is in the derating range, determine the first current share value as the first preset current share value according to the derating range; otherwise, determine the first current share value as the first target current share value according to the target current number, where the target current number is obtained by equally dividing the current value according to the target current share value.

[0177] The second generation module is configured to, when the internal negative temperature coefficient voltage value is in the derating range, determine the second current share value as the second preset current share value according to the derating range; otherwise, determine the second current share value as the second target current share value according to the target current number.

[0178] The third generation module is configured to, when the external negative temperature coefficient voltage value is in the derating range, determine the third current share value as the third preset current share value according to the derating range; otherwise, determine the third current share value as the third target current share value according to the target current number.

[0179] Optionally, in an embodiment of the present application, the derating module 1003 includes: a comparison unit and a second determination unit.

[0180] Among them, the comparison unit is configured to compare the magnitudes of the first current share value, the second current share value, and the third current share value.

[0181] A second determination unit, configured to determine a final current share value according to the comparison result.

[0182] Optionally, in an embodiment of the present application, it further includes: a second acquisition module, a second judgment module, a first execution module, and a second execution module.

[0183] The second acquisition module is configured to acquire a truth table corresponding to the vehicle lamp before reducing the current value of the vehicle lamp to the final current share value.

[0184] The second judgment module is configured to judge whether the working state of the vehicle lamp is a normal working state based on the truth table and the current working condition.

[0185] The first execution module is configured to allow the current reduction operation to be performed according to the final current share value when the working state is a normal working state.

[0186] The second execution module is configured to not allow the current reduction operation to be performed according to the final current share value when the working state is not a normal working state.

[0187] Optionally, in an embodiment of the present application, the first acquisition module 1002 includes: a third determination unit and a second acquisition unit.

[0188] The third determination unit is configured to determine the acquisition time of at least one of the battery positive voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value based on the current working condition.

[0189] The second acquisition unit is configured to periodically acquire at least one of the battery positive voltage value, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value based on the acquisition time.

[0190] It should be noted that the foregoing explanation of the embodiment of the vehicle lamp derating method also applies to the vehicle lamp derating device of this embodiment, and will not be elaborated here.

[0191] The headlight derating device proposed according to the embodiments of the present application can obtain the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the headlight according to the current working condition of the headlight, and then use different current share values to determine the final current share value of the headlight, and derate the current value of the headlight to the final current share value to complete the derating of the headlight, which can achieve precise derating of the headlight current, help prevent the headlight from being damaged due to excessive current, ensure that the headlight can work stably under various working conditions, extend the service life of the headlight, and perform dynamic adjustment according to the working condition of the headlight, which not only improves the lighting effect of the headlight, but also enhances the driving experience of users and improves driving safety. Thus, it solves the problems in the related art that the hardware implementation scheme requires additional hardware resources and is relatively difficult to modify, and the software implementation scheme requires a higher processor speed and a larger memory capacity, resulting in poor performance in terms of flexibility and response speed of these two technical solutions and being unable to meet the headlight performance requirements in different usage scenarios.

[0192] Figure 11 The structure diagram of a vehicle provided according to an embodiment of the present application. The vehicle may include:

[0193] A memory 1101, a processor 1102, and a computer program stored on the memory 1101 and executable on the processor 1102.

[0194] When the processor 1102 executes the program, it implements the headlight derating method provided in the above embodiment.

[0195] Furthermore, the vehicle further includes:

[0196] A communication interface 1103 for communication between the memory 1101 and the processor 1102.

[0197] The memory 1101 is used to store a computer program executable on the processor 1102.

[0198] The memory 1101 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0199] If the memory 1101, the processor 1102, and the communication interface 1103 are implemented independently, the communication interface 1103, the memory 1101, and the processor 1102 can be interconnected through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 11 only a thick line is used in Figure 11 , but it does not mean that there is only one bus or one type of bus.

[0200] Optionally, in a specific implementation, if the memory 1101, the processor 1102, and the communication interface 1103 are integrated on a single chip, the memory 1101, the processor 1102, and the communication interface 1103 can communicate with each other through an internal interface.

[0201] The processor 1102 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0202] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned headlight derating method is implemented.

[0203] The embodiments of the present application also provide a computer program product, including a computer program, and when the program is executed, the above-mentioned headlight derating method is implemented.

[0204] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0205] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0206] Any process or method description shown in a flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or N executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of this application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of this application pertain.

[0207] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part (electronic device) having one or N wirings, a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically by optically scanning the paper or other media, followed by editing, interpretation, or other appropriate processing as necessary, and then stored in a computer memory.

[0208] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0209] Those of ordinary skill in the art of the present technology can understand that all or part of the steps carried by the methods of the above-described embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0210] In addition, each functional unit in various embodiments of the present application may be integrated into one processing module, may exist physically alone for each unit, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0211] The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A headlight derating method, characterized in that, Including the following steps: Detect the current working condition of the vehicle lamp; Based on the current working condition, obtain at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp; Based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, determine the final current share value of the vehicle lamp, and derate the current value of the vehicle lamp to the final current share value.

2. The method according to claim 1, wherein The derating of the current value of the vehicle lamp to the final current share value includes: Obtain the resistance value corresponding to the vehicle lamp; Use the resistance value to determine the current value of the vehicle lamp; Reduce the current value at a preset derating rate or a preset derating step until the final current share value is reached.

3. The method according to claim 1, wherein Before determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, it further includes: Judge whether at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value is in the corresponding derating range; If the positive battery voltage value is in the derating range, determine the first current share value as the first preset current share value according to the derating range, otherwise, determine the first current share value as the first target current share value according to the target current share, where the target current share is obtained by equally dividing the current value according to the target current share value; If the internal negative temperature coefficient voltage value is in the derating range, determine the second current share value as the second preset current share value according to the derating range, otherwise, determine the second current share value as the second target current share value according to the target current share; If the external negative temperature coefficient voltage value is in the derating range, determine the third current share value as the third preset current share value according to the derating range, otherwise, determine the third current share value as the third target current share value according to the target current share.

4. The method according to claim 1, wherein The determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value includes: Compare the magnitudes of the first current share value, the second current share value, and the third current share value; Determine the final current share value according to the comparison result.

5. The method according to claim 1, wherein Before derating the current value of the vehicle lamp to the final current share value, it further includes: Obtain the truth table corresponding to the vehicle lamp; Based on the truth table and the current working condition, judge whether the working state of the vehicle lamp is a normal working state; If the working state is the normal working state, a current reduction operation is allowed to be performed according to the final current share value; If the working state is not the normal working state, a current reduction operation is not allowed to be performed according to the final current share value.

6. The method according to claim 1, characterized in that The obtaining, based on the currently encountered working condition, of at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp includes: Based on the currently encountered working condition, determining the obtaining time for obtaining at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value; Based on the obtaining time, periodically obtaining at least one of the positive battery voltage value, the internal negative temperature coefficient voltage, and the external negative temperature coefficient voltage value.

7. A headlight derating device, characterized in that Includes: A detection module for detecting the currently encountered working condition of the vehicle lamp; A first obtaining module for obtaining, based on the currently encountered working condition, at least one of the positive battery voltage value, the internal negative temperature coefficient voltage value, and the external negative temperature coefficient voltage value of the vehicle lamp; A derating module for determining the final current share value of the vehicle lamp based on at least one of the first current share value corresponding to the positive battery voltage value, the second current share value corresponding to the internal negative temperature coefficient voltage value, and the third current share value corresponding to the external negative temperature coefficient voltage value, and derating the current value of the vehicle lamp to the final current share value.

8. A vehicle, characterized in that, Includes: A memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the vehicle lamp derating method according to any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to be used for implementing the vehicle lamp derating method according to any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program which, when executed, is used for implementing the vehicle lamp derating method according to any one of claims 1-6.

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