CN-114785119-B - Output voltage regulating method of DCDC converter and related device

Abstract

The embodiment of the application provides an output voltage regulating method and a related device of a DCDC converter, wherein the method comprises the steps of obtaining the current output current value of the DCDC converter; the method comprises the steps of judging whether a current output current value is larger than a preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter if the current output current value is larger than the preset current threshold value, determining a required voltage value of a load as the target output voltage value of the DCDC converter if the current output current value is smaller than or equal to the preset current threshold value, adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter, and determining the current output voltage value according to the current output current of the DCDC converter, so that the output current of the DCDC converter is automatically balanced, and the stability of a system is improved.

Inventors

• Shi Lianzhi
• Xiao Zuxun
• LIU PENGFEI
• WU RENHUA

Assignees

• 深圳欣锐科技股份有限公司

Dates

Publication Date

20260508

Application Date

20220326

Claims (8)

1. 1. A method of regulating an output voltage of a DCDC converter, the method comprising: Acquiring a current output current value of a DCDC converter; if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter; if the current output current value is smaller than or equal to the preset current threshold value, determining that the required voltage value of the load is the target output voltage value of the DCDC converter; Adjusting a current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter; The parameter information comprises a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a lowest output voltage value of the DCDC converter and a required voltage value of a load, and the determining the target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter comprises the following steps: acquiring a first difference value between a peak output current value and the current output current value of the DCDC converter; Acquiring a second difference value between the peak output current value and the rated output current value; And determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
2. 2. The method of claim 1, wherein the determining the target output voltage value of the DCDC converter based on the first difference value, the second difference value, the lowest output voltage value, and the required voltage value of the load comprises: Obtaining a target output voltage value of the DCDC converter by a method shown in the following formula: , Wherein Vset is a target output voltage value of the DCDC converter, imax is a peak output current value, I ref is a rated output current value, vmin is a minimum output voltage value, vsetcan is a required voltage value of the load, and Io is a current output current value.
3. 3. The method according to any one of claims 1-2, wherein the present output current value is greater than the preset current threshold value, the adjusting the present output voltage value of the DCDC converter to the target output voltage value of the DCDC converter comprising: Acquiring an absolute value of a difference value between the target output voltage value and a loop target output voltage value; Determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval; and according to the regulating step length, regulating the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter.
4. 4. The method according to any one of claims 1-2, wherein the present output current value is less than or equal to the preset current threshold value, the adjusting the present output voltage value of the DCDC converter to the target output voltage value of the DCDC converter comprising: acquiring a preset adjusting step length; and according to the preset regulating step length, regulating the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter.
5. 5. An output voltage regulation device of a DCDC converter, the device comprising: An acquisition unit configured to acquire a current output current value of the DCDC converter; the judging unit is used for judging whether the current output current value is larger than a preset current threshold value or not; a first determining unit, configured to determine a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter if the current output current value is greater than the preset current threshold; a second determining unit, configured to determine that a required voltage value of a load is a target output voltage value of the DCDC converter if the current output current value is less than or equal to the preset current threshold value; an adjusting unit for adjusting a current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter; the parameter information includes a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a minimum output voltage value of the DCDC converter, and a required voltage value of a load, and the first determining unit includes: A first obtaining module, configured to obtain a first difference between a peak output current value of the DCDC converter and the current output current value; A second obtaining module, configured to obtain a second difference between the peak output current value and the rated output current value; and the first determining module is used for determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
6. 6. The apparatus of claim 5, wherein the first determining unit is configured to: the target output voltage value is obtained by a method shown in the following formula: , Wherein Vset is a target output voltage value of the DCDC converter, imax is a peak output current value, I ref is a rated output current value, vmin is a minimum output voltage value, vsetcan is a required voltage value of the load, and Io is a current output current value.
7. 7. A terminal comprising a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory being interconnected, wherein the memory is adapted to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the method of any of claims 1-4.
8. 8. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of any of claims 1-4.

Description

Output voltage regulating method of DCDC converter and related device Technical Field The application relates to the technical field of data processing, in particular to an output voltage regulating method of a DCDC converter and a related device. Background Because of the complex conditions of the low voltage load system in the vehicle, transient over-current conditions, such as continuous rotation of the steering wheel, ABS actuation, etc., are present, requiring the DC/DC converter to have the capability of assuming a far over-rated output current in a short period of time. For example, in the existing scheme, the rated capacity of the DCDC controller is 2kW, the rated output voltage is 14V, and the rated output current is 140A, but in the scenes of continuously rotating the steering wheel, ABS braking and the like, the demand of the output current is greater than 140A in several seconds, and the system cannot stably operate due to the fact that the output current exceeds the rated output current of the DCDC controller, so that the stability of the system is poor. Disclosure of Invention The embodiment of the application provides an output voltage regulating method and a related device of a DCDC converter, which can determine the current output voltage value according to the current output current of the DCDC converter, so that the output current of the DCDC converter can be automatically balanced, and the stability of a system is further improved. A first aspect of an embodiment of the present application provides a method for adjusting an output voltage of a DCDC converter, the method including: Acquiring a current output current value of a DCDC converter; if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter; if the current output current value is smaller than or equal to the preset current threshold value, determining that the required voltage value of the load is the target output voltage value of the DCDC converter; and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter. In one possible implementation, the parameter information includes a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a minimum output voltage value of the DCDC converter, and a required voltage value of a load, and the determining the target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter includes: acquiring a first difference value between a peak output current value and the current output current value of the DCDC converter; Acquiring a second difference value between the peak output current value and the rated output current value; And determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load. In one possible implementation, the parameter information includes a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a minimum output voltage value of the DCDC converter, and a required voltage value of a load, and the determining the target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter includes: Obtaining a target output voltage value of the DCDC converter by a method shown in the following formula: Wherein Vset is a target output voltage value of the DCDC converter, imax is a peak output current value, I ref is a rated output current value, vmin is a minimum output voltage value, vsetcan is a required voltage value of the load, and Io is a current output current value. In one possible implementation, the current output current value is greater than the preset current threshold, and the adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter includes: Acquiring an absolute value of a difference value between the target output voltage value and a loop target output voltage value; Determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval; and according to the regulating step length, regulating the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter. In one possible implementation, the current output current value is less than or equal to the preset current threshold, and the adjusting the current output voltage value of the DCDC converter to the target output voltage v