CN117713321A - Vehicle DCDC output voltage control method, storage medium and electronic equipment - Google Patents
Vehicle DCDC output voltage control method, storage medium and electronic equipment Download PDFInfo
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Abstract
The invention provides a vehicle DCDC output voltage control method, a storage medium and electronic equipment, comprising the following steps: acquiring current DCDC converter information of a DCDC converter and low-voltage storage battery information of a low-voltage storage battery in real time; calculating the current low-voltage load power of the low-voltage load according to the current DCDC converter information and the low-voltage storage battery information; respectively obtaining a temperature output voltage corresponding to the current battery temperature, an electric quantity output voltage corresponding to the electric quantity of the current battery and a power output voltage corresponding to the current low-voltage load power; if the current battery power is larger than a preset first power threshold and the current low-voltage load power is smaller than the preset first power threshold, taking the maximum value of the temperature output voltage, the power output voltage and the power output voltage as the output voltage of the DCDC converter, otherwise taking the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter. The invention realizes the dynamic adjustment of the output voltage of the DCDC converter, improves the working efficiency of the DCDC converter and reduces the power consumption.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a vehicle DCDC output voltage control method, a storage medium and electronic equipment.
Background
The direct current-direct current Converter (DC-to-DC Converter, DCDC) is also called DCDC Converter, and the DCDC Converter is a core component for normal power supply of low-voltage components for electric vehicles, and is mainly used for converting high-voltage direct current of a whole vehicle high-voltage power battery into 12V or 24V low-voltage direct current to provide power for stable operation of whole vehicle low-voltage electric appliances, such as charging of a low-voltage storage battery.
The prior output voltage control strategy of the DCDC converter mainly ensures the service lives of the high-voltage power battery and the low-voltage storage battery by a power reduction operation method, for example, the Chinese patent publication No. CN104859466B discloses a control method and a device for the output voltage of the DC/DC converter, and the control method and the device are used for acquiring a real-time temperature value of the low-voltage storage battery and a real-time state of charge (SOC) value of the high-voltage power battery and acquiring a first judgment value V of the output voltage corresponding to the real-time temperature value batt Output voltage second judgment value V corresponding to real-time state of charge SOC value out Then according to the first judgment value V of the output voltage batt Output voltage second judgment value V out And the output voltage of the DC/DC converter is regulated by the upper limit value or the lower limit value of the voltage regulating range of the DC/DC converter, so that the output voltage of the DC/DC converter is gradually reduced when the SOC of the high-voltage power battery is low, the output power of the DC/DC converter is linearly reduced, and the high-voltage power battery can provide more power for a motor to improve the power performance of the vehicle or the electric quantity of the high-voltage power battery is reduced more slowly.
However, the low-voltage storage battery is not considered in the output voltage control strategy of the existing DCDC converter, and the existing DCDC converter is always in a state of being charged by the low-voltage storage battery, so that the low-voltage storage battery is in a full-power state for a long time, the actual working efficiency of the DCDC converter is in a low-power state for a long time, the DCDC converter is caused to work in a low-efficiency section for a long time, and the power consumption is high.
Disclosure of Invention
The invention aims to overcome the defects that a DCDC converter in the prior art is in a low-efficiency working state for a long time and has high power consumption, and provides a vehicle DCDC output voltage control method, a storage medium and electronic equipment.
The technical scheme of the invention provides a vehicle DCDC output voltage control method, which comprises the following steps:
acquiring current DCDC converter information of a DCDC converter and low-voltage storage battery information of a low-voltage storage battery in real time, wherein the current DCDC converter information comprises current output voltage and current output current, and the low-voltage storage battery information comprises current battery temperature, current battery electric quantity, current battery current and current battery voltage of the low-voltage storage battery;
calculating the current low-voltage load power of a low-voltage load according to the current DCDC converter information and the low-voltage storage battery information;
respectively acquiring a temperature output voltage corresponding to the current battery temperature, an electric quantity output voltage corresponding to the current battery electric quantity and a power output voltage corresponding to the current low-voltage load power;
if the current battery power is greater than a preset first power threshold and the current low-voltage load power is less than a preset first power threshold, taking the maximum value of the temperature output voltage, the power output voltage and the power output voltage as the output voltage of the DCDC converter; and if the current battery power is smaller than or equal to a preset first power threshold or the current low-voltage load power is larger than or equal to a preset first power threshold, taking the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter.
Further, the calculating the current low-voltage load power of the low-voltage load according to the current DCDC converter information and the low-voltage battery information includes:
and calculating the sum of the product of the current battery voltage and the current battery current and the product of the current output voltage and the current output current to obtain the current low-voltage load power.
Further, the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power respectively includes:
if the current low-voltage load power is greater than or equal to a preset second power threshold value and the current low-voltage load power is smaller than the preset first power threshold value, taking a preset first sub-power output voltage as the power output voltage, wherein the preset first sub-power output voltage is smaller than the preset normal output voltage;
if the current low-voltage load power is greater than or equal to a preset third power threshold value and the current low-voltage load power is smaller than the preset second power threshold value, taking a preset second sub-power output voltage as the power output voltage, wherein the preset second sub-power output voltage is smaller than the preset first sub-power output voltage;
and if the current low-voltage load power is smaller than the preset third power threshold, taking a preset third sub-power output voltage as the power output voltage, wherein the preset third sub-power output voltage is smaller than the preset second sub-power output voltage.
Further, the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power respectively includes:
if the current battery temperature is greater than or equal to a preset first temperature threshold and the current battery temperature is less than a preset second temperature threshold, taking a preset first sub-temperature output voltage as the temperature output voltage;
if the current battery temperature is greater than or equal to the preset second temperature threshold and the current battery temperature is less than a preset third temperature threshold, taking a preset second sub-temperature output voltage as the temperature output voltage;
and if the current battery temperature is greater than or equal to the preset third temperature threshold and the current battery temperature is less than or equal to the preset fourth temperature threshold, taking the preset third sub-temperature output voltage as the temperature output voltage.
Further, the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power respectively includes:
if the current battery power is greater than the preset first power threshold and the current battery power is less than or equal to a preset second power threshold, taking a preset first sub-power output voltage as the power output voltage, wherein the preset first sub-power output voltage is less than the preset normal output voltage;
if the current battery power is greater than the preset second power threshold and the current battery power is less than or equal to a preset third power threshold, taking a preset second sub-power output voltage as the power output voltage, wherein the preset second sub-power output voltage is less than the preset first sub-power output voltage;
if the current battery power is greater than the preset third power threshold and the current battery power is less than or equal to a preset fourth power threshold, taking a preset third sub-power output voltage as the power output voltage, wherein the preset third sub-power output voltage is less than the preset second sub-power output voltage;
and if the current battery power is greater than the preset fourth power threshold and the current battery power is less than or equal to 100%, taking a preset fourth sub-power output voltage as the power output voltage, wherein the preset fourth sub-power output voltage is less than the preset third sub-power output voltage.
The technical solution of the present invention also provides a storage medium storing computer instructions for executing all the steps of the vehicle DCDC output voltage control method as described above when the computer executes the computer instructions.
The technical scheme of the invention also provides electronic equipment, which comprises:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the vehicle DCDC output voltage control method as previously described.
After the technical scheme is adopted, the method has the following beneficial effects: by controlling the output voltage of the DCDC converter according to the current DCDC converter information and the low-voltage storage battery information, when the low-voltage storage battery is in a full-power state and the low-voltage load is small, the output voltage of the DCDC converter is reduced, and if the low-voltage load is increased, the output voltage of the DCDC converter is increased, so that the DCDC converter can supply power for the low-voltage load without the need of supplying power for the low-voltage storage battery; or if the current electric quantity of the low-voltage storage battery is reduced and is lower than a preset first electric quantity threshold value, the output voltage of the DCDC converter is increased; or if the low-voltage load is reduced, the output voltage of the DCDC converter is reduced, and the dynamic adjustment of the output voltage of the DCDC converter is realized, so that the DCDC converter is prevented from being in a low-efficiency working state for a long time, the working efficiency of the DCDC converter is improved, and the power consumption is reduced.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. It should be understood that: the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention. In the figure:
FIG. 1 is a flowchart of a method for controlling a DC output voltage of a vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for controlling a DC output voltage of a vehicle according to another embodiment of the present invention;
FIG. 3 is a flowchart of a method for controlling a DC output voltage of a vehicle according to still another embodiment of the present invention;
FIG. 4 is a flowchart of a method for controlling a DC output voltage of a vehicle according to another embodiment of the present invention;
fig. 5 is a schematic hardware structure of an electronic device for DCDC output voltage control of a vehicle according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the accompanying drawings.
It is to be readily understood that, according to the technical solutions of the present invention, those skilled in the art may replace various structural modes and implementation modes with each other without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.
The control method of the DCDC output voltage of the vehicle is mainly applied to a whole vehicle controller (Vehicle Control Uni t, VCU) of an electric vehicle.
As shown in fig. 1, fig. 1 is a flowchart of a method for controlling DCDC output voltage of a vehicle according to an embodiment of the present invention, including:
step S101: acquiring current DCDC converter information of a DCDC converter and low-voltage storage battery information of a low-voltage storage battery in real time;
step S102: calculating the current low-voltage load power of the low-voltage load according to the current DCDC converter information and the low-voltage storage battery information;
step S103: respectively obtaining a temperature output voltage corresponding to the current battery temperature, an electric quantity output voltage corresponding to the electric quantity of the current battery and a power output voltage corresponding to the current low-voltage load power;
step S104: judging whether the current battery electric quantity is larger than a preset first electric quantity threshold value and whether the current low-voltage load power is smaller than a preset first power threshold value;
step S105: taking the maximum value of the temperature output voltage, the electric quantity output voltage and the power output voltage as the output voltage of the DCDC converter;
step S106: and taking the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter.
Specifically, the VCU monitors states of the DCDC converter and the low-voltage battery in real time, and executes step S101 to obtain current DCDC converter information of the DCDC converter and low-voltage battery information of the low-voltage battery in real time, where the current DCDC converter information includes a current output voltage and a current output current, and the low-voltage battery information includes a current battery temperature, a current battery power, a current battery current and a current battery voltage of the low-voltage battery; step S102 is executed to calculate the current low-voltage load power of the low-voltage load according to the current DCDC converter information and the low-voltage storage battery information; step S103-step S104 are then executed, in step S104, whether the current battery power is smaller than or equal to a preset first power threshold or whether the current low-voltage load power is larger than or equal to a preset first power threshold is judged, if yes, step S105 is executed to take the maximum value of the temperature output voltage, the power output voltage and the power output voltage as the output voltage of the DCDC converter, otherwise, step S106 is executed to take the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter.
The following describes the principle of the vehicle DCDC output voltage control method provided in the present application, taking the state of battery power of the low-voltage storage battery as an example, specifically as follows:
when the current battery electric quantity of the low-voltage storage battery is smaller than or equal to a preset first electric quantity threshold value, the current battery electric quantity is low, the maximum value of the temperature output voltage and the preset normal output voltage is used as the output voltage of the DCDC converter, the output voltage of the DCDC converter is improved, and the DCDC converter charges the low-voltage storage battery until the low-voltage storage battery is full; when the current battery electric quantity of the low-voltage storage battery is larger than a preset first electric quantity threshold value and the current low-voltage load power is smaller than a preset first power threshold value, the current battery electric quantity is in a full-power state or is close to the full-power state, the low-voltage load is small, the maximum value of the temperature output voltage, the electric quantity output voltage and the power output voltage is taken as the output voltage of the DCDC converter, the output voltage of the DCDC converter is reduced, the DCDC converter is not used for charging the low-voltage storage battery, and at the moment, if the low-voltage load is increased, the output voltage of the DCDC converter is increased, so that the DCDC converter can supply power for the low-voltage load without the power supply of the low-voltage storage battery; or if the current electric quantity of the low-voltage storage battery is reduced and is lower than a preset first electric quantity threshold value, taking the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter, and improving the output voltage of the DCDC converter, so that the DCDC converter is prevented from being in a low-efficiency working state for a long time, the working efficiency of the DCDC converter is improved, and the power consumption is reduced.
The temperature output voltage, the electric quantity output voltage and the power output voltage can be obtained through a table lookup mode, such as searching a preset battery temperature and temperature output voltage relation table, a battery electric quantity and electric quantity output voltage relation table and a low-voltage load power and power output voltage relation table; or searching a preset temperature voltage curve, an electric quantity voltage curve and a power voltage curve, and fitting the temperature voltage curve according to the historical battery temperature and the historical temperature output voltage of the low-voltage storage battery to obtain the temperature voltage curve; fitting an electric quantity voltage curve according to the historical battery electric quantity of the low-voltage storage battery and the historical electric quantity output voltage to obtain the electric quantity voltage curve; and fitting a power voltage curve according to the historical low-voltage load power and the historical power output voltage of the low-voltage load.
The preset normal output voltage is the output voltage set by the DCDC converter in the normal working voltage interval, and the preset normal output voltage is only required to ensure that the output voltage of the DCDC converter is larger than the charging voltage of the low-voltage storage battery when a high-power-consumption load exists, so that the output voltage of the DCDC converter is prevented from being pulled down to be incapable of normally charging the low-voltage storage battery.
The preset first electric quantity threshold and the preset first power threshold can be set according to user requirements, the preset first electric quantity threshold can be set to be an electric quantity value when the low-voltage storage battery is in a full-power state or is close to the full-power state, and the preset first power threshold can be set to be a power value when the low-voltage load is in a high-power state.
According to the embodiment, the output voltage of the DCDC converter is controlled according to the current DCDC converter information and the low-voltage storage battery information, when the low-voltage storage battery is in a full-power state and the low-voltage load is small, the output voltage of the DCDC converter is reduced, and at the moment, if the low-voltage load is increased, the output voltage of the DCDC converter is increased, so that the DCDC converter can supply power for the low-voltage load without the need of supplying power for the low-voltage storage battery; or if the current electric quantity of the low-voltage storage battery is reduced and is lower than a preset first electric quantity threshold value, the output voltage of the DCDC converter is increased; or if the low-voltage load is reduced, the output voltage of the DCDC converter is reduced, and the dynamic adjustment of the output voltage of the DCDC converter is realized, so that the DCDC converter is prevented from being in a low-efficiency working state for a long time, the working efficiency of the DCDC converter is improved, and the power consumption is reduced.
In one embodiment, in order to improve accuracy, step S102 includes:
and calculating the sum of the product of the current battery voltage and the current battery current and the product of the current output voltage and the current output current to obtain the current low-voltage load power.
Specifically, the following formula is adopted to calculate the current low-voltage load power:
P＝U 1 ×I 1 +U 2 ×I 2
wherein P is the current low-voltage load power; u (U) 1 Is the current battery voltage; i 1 Is the current of the battery; u (U) 2 Is the current output voltage; i 2 Is the current output.
It should be noted that, when calculating the current low-voltage load power P, the charge and discharge states of the low-voltage storage battery need to be distinguished, and the current battery current I 1 The positive voltage is applied when the low-voltage battery is discharged, and the negative voltage is applied when the low-voltage battery is charged.
On the basis of the above embodiment, as shown in fig. 2, step S103 includes:
step S201: judging whether the current low-voltage load power is larger than or equal to a preset second power threshold value or not, and judging whether the current low-voltage load power is smaller than a preset first power threshold value or not;
step S202: taking a preset first sub-power output voltage as a power output voltage, wherein the preset first sub-power output voltage is smaller than a preset normal output voltage;
step S203: judging whether the current low-voltage load power is larger than or equal to a preset third power threshold value or not, and judging whether the current low-voltage load power is smaller than the preset second power threshold value or not;
step S204: taking a preset second sub-power output voltage as a power output voltage, wherein the preset second sub-power output voltage is smaller than the preset first sub-power output voltage;
step S205: judging whether the current low-voltage load power is smaller than a preset third power threshold value or not;
step S206: and taking the preset third sub-power output voltage as the power output voltage, wherein the preset third sub-power output voltage is smaller than the preset second sub-power output voltage.
Specifically, after the VCU calculates the current low-voltage load power according to the current DCDC converter information and the low-voltage battery information, step S201 is executed to determine whether the current low-voltage load power is greater than or equal to a preset second power threshold, and whether the current low-voltage load power is less than a preset first power threshold, if yes, step S202 is executed; otherwise, executing step S203 to determine whether the current low-voltage load power is greater than or equal to the preset third power threshold, and whether the current low-voltage load power is less than the preset second power threshold, if yes, executing step S204; otherwise, executing step S205 to determine whether the current low-voltage load power is less than the preset third power threshold, if yes, executing step S206, otherwise, executing step S201 to implement adjusting the output voltage of the DCDC converter according to the current low-voltage load power of the low-voltage load, and if the current low-voltage load power is increased, increasing the output voltage of the DCDC converter, so that the DCDC converter supplies power to the low-voltage load; if the current low-voltage load power is reduced, the output voltage of the DCDC converter is reduced, the DCDC converter is prevented from being in a low-efficiency working state for a long time, the working efficiency of the DCDC converter is improved, and the power consumption is reduced.
On the basis of the above embodiment, as shown in fig. 3, step S103 includes:
step S301: judging whether the current battery temperature is greater than or equal to a preset first temperature threshold value or not, and judging whether the current battery temperature is less than a preset second temperature threshold value or not;
step S302: taking a preset first sub-temperature output voltage as a temperature output voltage;
step S303: judging whether the current battery temperature is greater than or equal to a preset second temperature threshold value or not, and judging whether the current battery temperature is less than a preset third temperature threshold value or not;
step S304: taking the preset second sub-temperature output voltage as a temperature output voltage;
step S305: judging whether the current battery temperature is greater than or equal to a preset third temperature threshold value or not, and judging whether the current battery temperature is less than or equal to a preset fourth temperature threshold value or not;
step S306: and taking the preset third sub-temperature output voltage as a temperature output voltage.
Specifically, after the VCU obtains the current battery temperature of the low-voltage storage battery, step S301 is executed to determine whether the current battery temperature is greater than or equal to a preset first temperature threshold, and whether the current battery temperature is less than a preset second temperature threshold, if yes, step S302 is executed; otherwise, step S303 is executed to determine whether the current battery temperature is greater than or equal to the preset second temperature threshold, and whether the current battery temperature is less than the preset third temperature threshold, if yes, step S304 is executed; otherwise, executing step S305 to determine whether the current battery temperature is greater than or equal to the preset third temperature threshold, and whether the current battery temperature is less than or equal to the preset fourth temperature threshold, if yes, executing step S306, otherwise executing step S301 to adjust the output voltage of the DCDC converter according to the current battery temperature of the low-voltage storage battery, and if the current battery temperature is increased, reducing the output voltage of the DCDC converter and reducing the power consumption; if the current battery temperature is reduced, the output voltage of the DCDC converter is improved, so that the working efficiency of the DCDC converter is improved on the premise of ensuring the service life of the low-voltage storage battery, and the DCDC converter is prevented from being in a low-efficiency working state for a long time.
On the basis of the above embodiment, as shown in fig. 4, step S103 includes:
step S401: judging whether the current battery electric quantity is larger than a preset first electric quantity threshold value or not, and judging whether the current battery electric quantity is smaller than or equal to a preset second electric quantity threshold value or not;
step S402: taking the preset first sub-electric quantity output voltage as an electric quantity output voltage, wherein the preset first sub-electric quantity output voltage is smaller than a preset normal output voltage;
step S403: judging whether the current battery electric quantity is larger than a preset second electric quantity threshold value or not, and judging whether the current battery electric quantity is smaller than or equal to a preset third electric quantity threshold value or not;
step S404: taking the preset second sub-electric quantity output voltage as an electric quantity output voltage, wherein the preset second sub-electric quantity output voltage is smaller than the preset first sub-electric quantity output voltage;
step S405: judging whether the current battery electric quantity is larger than a preset third electric quantity threshold value or not, and judging whether the current battery electric quantity is smaller than or equal to a preset fourth electric quantity threshold value or not;
step S406: taking the preset third sub-electric quantity output voltage as an electric quantity output voltage, wherein the preset third sub-electric quantity output voltage is smaller than the preset second sub-electric quantity output voltage;
step S407: judging whether the current battery electric quantity is larger than a preset fourth electric quantity threshold value or not, and judging whether the current battery electric quantity is smaller than or equal to 100%;
step S408: and taking the preset fourth sub-electric quantity output voltage as an electric quantity output voltage, wherein the preset fourth sub-electric quantity output voltage is smaller than the preset third sub-electric quantity output voltage.
Specifically, after the VCU obtains the current battery power of the low-voltage storage battery, step S401 is executed to determine whether the current battery power is greater than a preset first power threshold, and whether the current battery power is less than or equal to a preset second power threshold, if yes, step S402 is executed; otherwise, step S403 is executed to determine whether the current battery power is greater than a preset second power threshold, and whether the current battery power is less than or equal to a preset third power threshold, if yes, step S404 is executed; otherwise, executing step S405 to determine whether the current battery power is greater than a preset third power threshold, and whether the current battery power is less than or equal to a preset fourth power threshold, if yes, executing step S406, otherwise, executing step S401 to adjust the output voltage of the DCDC converter according to the current battery power of the low-voltage storage battery, and if the current battery power is in a full power state, reducing the output voltage of the DCDC converter, and reducing power consumption; if the current battery power is in a state of not being full of electricity, the output voltage of the DCDC converter is improved, so that the DCDC converter charges the low-voltage storage battery, and the working efficiency of the DCDC converter is improved on the premise of ensuring the service life of the low-voltage storage battery, and the DCDC converter is prevented from being in a low-efficiency working state for a long time.
An embodiment of the invention provides a storage medium for storing computer instructions that, when executed by a computer, are adapted to carry out all the steps of a vehicle DCDC output voltage control method in any of the method embodiments described above.
As shown in fig. 5, a hardware configuration diagram of an electronic device for DCDC output voltage control of a vehicle according to an embodiment of the present invention includes:
at least one processor 501; the method comprises the steps of,
a memory 502 communicatively coupled to the at least one processor 501; wherein,
the memory 502 stores instructions executable by the at least one processor 501 to enable the at least one processor 501 to perform the vehicle DCDC output voltage control method as previously described.
One processor 501 is illustrated in fig. 5.
The electronic device is preferably an electronic control unit (Electronic Control Unit, ECU).
The electronic device may further include: an input device 503 and an output device 504.
The processor 501, memory 502, input device 503, and output device 504 may be connected by a bus or other means, the connection being illustrated as a bus.
The memory 502 is used as a non-volatile computer readable storage medium, and may be used to obtain a non-volatile software program, a non-volatile computer executable program, and modules, such as program instructions/modules corresponding to the DCDC output voltage control method of the vehicle in the embodiments of the present application, for example, the method flows shown in fig. 1-4. The processor 501 executes various functional applications and data processing by running nonvolatile software programs, instructions and modules acquired in the memory 502, that is, implements the vehicle DCDC output voltage control method in the above-described embodiment.
Memory 502 may include an acquisition program area and an acquisition data area, wherein the acquisition program area may acquire an operating system, at least one application program required for a function; the acquisition data area may acquire data or the like created according to the use of the vehicle DCDC output voltage control method. In addition, memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 502 may optionally include memory remotely located with respect to processor 501, which may be connected via a network to a device performing the vehicle DCDC output voltage control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 503 may receive user clicks of inputs and generate signal inputs related to user settings and function controls of the vehicle DCDC output voltage control method. The output 504 may include a display device such as a display screen.
The vehicle DCDC output voltage control method in any of the method embodiments described above is performed in the one or more modules retrieved in the memory 502 when executed by the one or more processors 501.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present application.
The above embodiments are only for illustrating the technical solution of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A vehicle DCDC output voltage control method, characterized by comprising:
acquiring current DCDC converter information of a DCDC converter and low-voltage storage battery information of a low-voltage storage battery in real time, wherein the current DCDC converter information comprises current output voltage and current output current, and the low-voltage storage battery information comprises current battery temperature, current battery electric quantity, current battery current and current battery voltage of the low-voltage storage battery;
calculating the current low-voltage load power of a low-voltage load according to the current DCDC converter information and the low-voltage storage battery information;
respectively acquiring a temperature output voltage corresponding to the current battery temperature, an electric quantity output voltage corresponding to the current battery electric quantity and a power output voltage corresponding to the current low-voltage load power;
if the current battery power is greater than a preset first power threshold and the current low-voltage load power is less than a preset first power threshold, taking the maximum value of the temperature output voltage, the power output voltage and the power output voltage as the output voltage of the DCDC converter; and if the current battery power is smaller than or equal to a preset first power threshold or the current low-voltage load power is larger than or equal to a preset first power threshold, taking the maximum value of the temperature output voltage and the preset normal output voltage as the output voltage of the DCDC converter.
2. The vehicle DCDC output voltage control method of claim 1, wherein said calculating a current low-voltage load power of a low-voltage load from said current DCDC converter information and said low-voltage battery information includes:
and calculating the sum of the product of the current battery voltage and the current battery current and the product of the current output voltage and the current output current to obtain the current low-voltage load power.
3. The vehicle DCDC output voltage control method of claim 2, wherein the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power, respectively, includes:
if the current low-voltage load power is greater than or equal to a preset second power threshold value and the current low-voltage load power is smaller than the preset first power threshold value, taking a preset first sub-power output voltage as the power output voltage, wherein the preset first sub-power output voltage is smaller than the preset normal output voltage;
if the current low-voltage load power is greater than or equal to a preset third power threshold value and the current low-voltage load power is smaller than the preset second power threshold value, taking a preset second sub-power output voltage as the power output voltage, wherein the preset second sub-power output voltage is smaller than the preset first sub-power output voltage;
and if the current low-voltage load power is smaller than the preset third power threshold, taking a preset third sub-power output voltage as the power output voltage, wherein the preset third sub-power output voltage is smaller than the preset second sub-power output voltage.
4. The vehicle DCDC output voltage control method of claim 1, wherein the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power, respectively, includes:
if the current battery temperature is greater than or equal to a preset first temperature threshold and the current battery temperature is less than a preset second temperature threshold, taking a preset first sub-temperature output voltage as the temperature output voltage;
if the current battery temperature is greater than or equal to the preset second temperature threshold and the current battery temperature is less than a preset third temperature threshold, taking a preset second sub-temperature output voltage as the temperature output voltage;
and if the current battery temperature is greater than or equal to the preset third temperature threshold and the current battery temperature is less than or equal to the preset fourth temperature threshold, taking the preset third sub-temperature output voltage as the temperature output voltage.
5. The DCDC output voltage control method of any of claims 1 to 4, wherein the obtaining the temperature output voltage corresponding to the current battery temperature, the power output voltage corresponding to the current battery power, and the power output voltage corresponding to the current low-voltage load power, respectively, includes:
if the current battery power is greater than the preset first power threshold and the current battery power is less than or equal to a preset second power threshold, taking a preset first sub-power output voltage as the power output voltage, wherein the preset first sub-power output voltage is less than the preset normal output voltage;
if the current battery power is greater than the preset second power threshold and the current battery power is less than or equal to a preset third power threshold, taking a preset second sub-power output voltage as the power output voltage, wherein the preset second sub-power output voltage is less than the preset first sub-power output voltage;
if the current battery power is greater than the preset third power threshold and the current battery power is less than or equal to a preset fourth power threshold, taking a preset third sub-power output voltage as the power output voltage, wherein the preset third sub-power output voltage is less than the preset second sub-power output voltage;
and if the current battery power is greater than the preset fourth power threshold and the current battery power is less than or equal to 100%, taking a preset fourth sub-power output voltage as the power output voltage, wherein the preset fourth sub-power output voltage is less than the preset third sub-power output voltage.
6. A storage medium storing computer instructions which, when executed by a computer, are adapted to carry out all the steps of the vehicle DCDC output voltage control method of any one of claims 1 to 5.
7. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the vehicle DCDC output voltage control method of any one of claims 1-5.
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