CN113492723A - Power battery power distribution method, vehicle and computer readable storage medium - Google Patents
Power battery power distribution method, vehicle and computer readable storage medium Download PDFInfo
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- CN113492723A CN113492723A CN202110834016.2A CN202110834016A CN113492723A CN 113492723 A CN113492723 A CN 113492723A CN 202110834016 A CN202110834016 A CN 202110834016A CN 113492723 A CN113492723 A CN 113492723A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention discloses a power distribution method of a power battery, a vehicle and a computer readable storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining the discharge power of a power battery, limiting the working state of each high-voltage energy consumption component of the vehicle according to a preset power interval and the discharge power, determining the actual working state of each high-voltage energy consumption component according to the limited working state, obtaining all preset powers of each high-voltage energy consumption component according to the actual working state, and determining the power distributed to a driving motor of the vehicle according to the discharge power and each preset power. The working states of the high-voltage energy consumption components of the vehicle are limited by designing the preset power interval, so that the power distributed to the driving motor is determined, the reasonability of the distribution and utilization of the discharge power of the power battery can be improved, and the fluctuation of the power distributed to the driving motor due to the fact that the actual power consumption of the high-voltage energy consumption components is unstable is avoided. Therefore, the utilization rate of the discharge power of the power battery is increased, and the driving comfort of the whole vehicle is improved.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a power battery power distribution method, a vehicle and a computer readable storage medium.
Background
With the increasing importance of the world on the problems of energy safety and environmental protection, the requirements of various countries on pollutant emission of automobiles are more and more strict, and in order to reduce the dependence on energy and realize energy conservation and emission reduction, new energy automobiles become the development trend of the current automobile industry.
In the pure electric vehicle, a power battery is the only power energy source, and the discharge power of the battery directly determines the working performance of each high-voltage energy-consuming component in the vehicle, so that when the discharge power of the power battery fluctuates in different ranges, if the power of the battery is not reasonably distributed, the influence on each high-voltage energy-consuming component in the vehicle in different degrees is generated, especially, if the power distribution method is unreasonable, the actually consumed power of each high-voltage energy-consuming component is unstable, the power distributed to a driving motor is fluctuated, and the vehicle is subjected to pause and frustration in the driving process, and the driving experience of the vehicle is influenced.
Disclosure of Invention
The invention mainly aims to provide a power battery power distribution method. The problem of how to increase the discharge power's of power battery utilization ratio, promote whole car driving comfort is solved.
In order to achieve the above purpose, the invention provides a power distribution method for power batteries, comprising the following steps:
acquiring the discharge power of a power battery;
limiting the working state of each high-voltage energy consumption component of the vehicle according to a preset power interval and the discharge power;
determining the actual working state of each high-voltage energy-consuming component according to the limited working state, and acquiring all preset power of each high-voltage energy-consuming component according to the actual working state;
and determining power distributed to a driving motor of the vehicle according to the discharge power and each preset power.
Optionally, the step of limiting the operating state of each high-voltage energy consumption component of the vehicle according to the preset power interval and the discharge power includes:
classifying the high-voltage energy-consuming components of the vehicle according to a preset priority to obtain first high-voltage energy-consuming components and second high-voltage energy-consuming components;
and limiting the working state of each first high-voltage energy consumption component and each second high-voltage energy consumption component according to a preset power interval and the discharge power.
Optionally, the preset power interval includes a second preset power interval, and the step of limiting the operating state of each of the first high-voltage energy-consuming components and each of the second high-voltage energy-consuming components according to the preset power interval and the discharge power includes:
if the discharge power is greater than a second power maximum value corresponding to the second preset power interval, limiting the working state of each first high-voltage energy consumption component to be an allowable starting state;
and limiting the working state of each second high-voltage energy consumption component to be an opening-allowed state.
Optionally, the preset power interval includes a first preset power interval, a first maximum power value corresponding to the first preset power interval is smaller than a second minimum power value corresponding to the second preset power interval, and after the step of defining the working state of each second high-voltage energy consumption component as an allowable open state, the method further includes:
continuously monitoring the discharge power, and if the discharge power is smaller than a second power minimum value corresponding to a second preset power interval, limiting the working state of the second high-voltage energy consumption component to be a starting prohibition state;
and limiting the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval.
Optionally, the step of defining the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval includes:
if the discharge power is larger than a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
and continuously monitoring the discharge power, and if the discharge power is smaller than a first power minimum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be a starting prohibition state.
Optionally, after the step of defining the operating state of the first high-voltage energy-consuming component as the opening prohibition state, the method further includes:
continuously monitoring the discharge power, and if the discharge power is greater than or equal to a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
judging whether the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval;
and if the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval, limiting the working state of the second high-voltage energy consumption component to be an allowable starting state.
Optionally, the step of obtaining all preset powers of the high-voltage energy consumption components according to the actual working state includes:
determining all operating high-voltage energy-consuming components of which the actual working states are opening states in all the high-voltage energy-consuming components;
and determining the preset power corresponding to each running high-voltage energy consumption component except the driving motor.
Optionally, the step of determining the power distributed to the driving motor of the vehicle according to the discharge power and the preset powers includes:
calculating the sum of the preset powers, calculating the difference between the discharge power and the sum, and taking the difference as a power difference;
and taking the product of the power difference value and a preset driving efficiency value as a power value distributed to a driving motor of the vehicle.
In addition, to achieve the above object, the present invention further provides a vehicle including a memory, a processor, and a power battery power distribution program stored on the memory and operable on the processor, wherein: the power battery power distribution program when executed by the processor implements the steps of the power battery power distribution method as described above.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, on which a power battery power distribution program is stored, which when executed by a processor implements the steps of the power battery power distribution method as described above.
According to the power battery power distribution method, the vehicle and the computer readable storage medium, after the discharge power of the power battery is obtained, the working state of each high-voltage energy consumption component of the vehicle is limited according to the preset power interval and the discharge power, the actual working state of each high-voltage energy consumption component and each preset power corresponding to the actual working state are obtained, and the power distributed to the driving motor is determined according to the discharge power and each preset power. The working state of each high-voltage energy consumption component of the vehicle is limited by designing a preset power interval, and the power distributed to the driving motor is determined, so that the discharge power of the power battery is reasonably utilized, and the fluctuation of the power distributed to the driving motor caused by the instability of the actual power consumption of each high-voltage energy consumption component is avoided. Therefore, the utilization rate of the discharge power of the power battery is increased, and the driving comfort of the vehicle is improved.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a power distribution method for power cells according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a power battery power distribution scheme of a second embodiment of the power battery power distribution method of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a vehicle. As shown in fig. 1, the vehicle may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen based on the ambient light level and a proximity sensor that turns off the display screen and/or backlight when the hardware device is moved to the ear. Of course, the hardware device may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and so on, which are not described herein again.
Those skilled in the art will appreciate that the configuration of the terminal shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, memory 1005, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a power battery power distribution program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and processor 1001 may be configured to invoke a power battery power distribution program stored in memory 1005 and perform the following operations:
acquiring the discharge power of a power battery;
limiting the working state of each high-voltage energy consumption component of the vehicle according to a preset power interval and the discharge power;
determining the actual working state of each high-voltage energy-consuming component according to the limited working state, and acquiring all preset power of each high-voltage energy-consuming component according to the actual working state;
and determining power distributed to a driving motor of the vehicle according to the discharge power and each preset power.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
classifying the high-voltage energy-consuming components of the vehicle according to a preset priority to obtain first high-voltage energy-consuming components and second high-voltage energy-consuming components;
and limiting the working state of each first high-voltage energy consumption component and each second high-voltage energy consumption component according to a preset power interval and the discharge power.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
if the discharge power is larger than a second power maximum value corresponding to the second preset power interval, limiting the working state of each first high-voltage energy consumption component to be an allowable starting state;
and limiting the working state of each second high-voltage energy consumption component to be an opening-allowed state.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
continuously monitoring the discharge power, and if the discharge power is smaller than a second power minimum value corresponding to a second preset power interval, limiting the working state of the second high-voltage energy consumption component to be a starting prohibition state;
and limiting the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
if the discharge power is larger than a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
and continuously monitoring the discharge power, and if the discharge power is smaller than a first power minimum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be a starting prohibition state.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
continuously monitoring the discharge power, and if the discharge power is greater than or equal to a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
judging whether the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval;
and if the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval, limiting the working state of the second high-voltage energy consumption component to be an allowable starting state.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
determining all operating high-voltage energy-consuming components of which the actual working states are opening states in all the high-voltage energy-consuming components;
and determining the preset power corresponding to each running high-voltage energy consumption component except the driving motor.
Further, processor 1001 may invoke a power battery power distribution program stored in memory 1005, and also perform the following operations:
calculating the sum of the preset powers, calculating the difference between the discharge power and the sum, and taking the difference as a power difference;
and taking the product of the power difference value and a preset driving efficiency value as a power value distributed to a driving motor of the vehicle.
The specific embodiment of the present invention applied to the vehicle is substantially the same as the following embodiments applied to the power distribution method of the power battery, and the detailed description thereof is omitted here.
Referring to fig. 2, fig. 2 is a schematic flow chart of a power battery power distribution method according to a first embodiment of the present invention, wherein the power battery power distribution method includes the following steps:
step S100, acquiring the discharge power of the power battery;
in this embodiment, the power BATTERY is used as the only power energy source of the pure electric Vehicle, and the discharge power of the power BATTERY is affected by factors such as the SOC (State of Charge), the temperature, and the sustained discharge time of the power BATTERY, and the BMS (BATTERY management system) may calculate the discharge power of the power BATTERY in real time and send the discharge power to a Controller Area Network (CAN) Network (Controller Area Network), and after receiving the signal, the VCU (Vehicle control unit, complete Vehicle control module) allocates the discharge power of the power BATTERY to each high-voltage component according to a preset power allocation strategy and an opening condition of the high-voltage component. The discharge power value of the power battery is changed in real time, so that the whole power battery power distribution method runs in real time, and the accuracy of power distribution is ensured. The power distribution system of the power battery obtains the discharge power of the power battery of the vehicle.
Step S200, limiting the working state of each high-voltage energy consumption component of the vehicle according to a preset power interval and the discharge power;
in the pure electric vehicle, the working state can be a state allowing working, namely a state allowing starting, and under the state allowing starting, a switch of the high-voltage energy consumption component is started, and the high-voltage energy consumption component works normally; the working state may also be a state in which the working is not allowed, that is, an on-prohibited state, in which the switch of the high-voltage energy consumption component is turned on or off, and the high-voltage energy consumption component is not operable. Under normal operation, high-voltage components directly consuming power of the power battery are used as high-voltage energy consumption components, such as a driving motor for converting electric energy of the power battery into mechanical energy and outputting torque to drive a vehicle to run, a DC/DC converter (voltage converter) used as a bridge for connecting the high-voltage components and the low-voltage components and used for charging the low-voltage storage battery and supplying power to low-voltage electric appliances, and an air conditioner AC (air conditioning), a fan heater (ptc heater), a DC/AC (DC-Direct current, AC-Alternating current, Direct current/Alternating current) converter and the like. The power interval for limiting the working state of each high-voltage energy-consuming component is preset and used as the preset power interval, so that the phenomenon that the power battery and each high-voltage energy-consuming component are influenced to different degrees due to the fact that part of the high-voltage energy-consuming components are switched back and forth between the working state and the non-working state due to the fluctuation of the power battery discharging power when the power value of the power battery allowed to be opened or closed is completely limited or not limited is avoided. And limiting the working state of each high-voltage energy consumption component according to the preset power interval and the discharge power of the power battery, so that the actual working state of the high-voltage energy consumption component can be obtained according to the limiting result. In an embodiment, the preset power interval may be a preset power interval between a power value for allowing the high-voltage energy-consuming component to be turned on and a power value for prohibiting the high-voltage energy-consuming component from being turned on.
Step S300, determining the actual working state of each high-voltage energy-consuming component according to the limited working state, and acquiring all preset power of each high-voltage energy-consuming component according to the actual working state;
the working state of each high-voltage energy consumption component is in a state of allowing to be started or forbidding to be started under the limitation of a preset power interval, wherein in the working state of allowing to be started, all switches of the high-voltage energy consumption components allowed to be started are not necessarily started, namely at the moment, the actual working state of the high-voltage energy consumption components started by the switches is in a starting state, and the actual working state of the high-voltage energy consumption components closed by the switches is in a closing state; when the switch is on or off, the high-voltage energy consumption component is in a stop working state, namely the actual working state of the high-voltage energy consumption component is in the off state under the working state of forbidding to be on. The method comprises the steps of presetting power values of all high-voltage energy consumption components, obtaining actual working states of the high-voltage energy consumption components, and obtaining the preset power values corresponding to the high-voltage energy consumption components when the obtained actual working states of the high-voltage energy consumption components are in an opening state. And acquiring each preset power corresponding to each high-voltage energy consumption component according to the actual working state of each high-voltage energy consumption component.
It can be understood that the preset power of each high-voltage energy consumption component may be a maximum power value that each high-voltage energy consumption component can reach when operating, or may be a power value that is obtained according to a large number of experiments or working experiences and is set for each high-voltage energy consumption component to avoid that the preset power is constant due to unstable actual power consumption of each high-voltage energy consumption component, so as to ensure normal operation of each high-voltage energy consumption component.
And step S400, determining power distributed to a driving motor of the vehicle according to the discharge power and each preset power.
The pure electric vehicle takes the power battery as the only power energy source, the power battery provides electric energy for the driving motor, the driving motor converts the electric energy into mechanical energy,the wheels and the working device are driven by a transmission device or directly.According to the discharge power and the position of the power batteryAnd determining the power distributed to a driving motor of the vehicle according to the acquired preset power of each high-voltage energy consumption component. The power distributed to the driving motor of the vehicle is determined through the acquired preset powers, so that the fluctuation of the power distributed to the driving motor caused by the instability of the power actually consumed by each high-voltage energy consumption component can be avoided, and the vehicle can be prevented from being subjected to suspension feeling during running. In an embodiment, the determining the power distributed to the driving motor according to the discharging power and the preset powers may be a difference value obtained by subtracting the preset powers of the high-voltage energy consumption components one by one from the discharging power of the power battery, and the power distributed to the driving motor is obtained according to the difference value.
In the embodiment of the invention, after the discharging power of the power battery is obtained, the working state of each high-voltage energy consumption component of the vehicle is limited according to the preset power interval and the discharging power, the actual working state of each high-voltage energy consumption component and each preset power corresponding to the actual working state are obtained, and the power distributed to the driving motor of the vehicle is determined according to the discharging power and each preset power. The working state of each high-voltage energy consumption component of the vehicle is limited by designing a preset power interval, and the power distributed to the driving motor of the vehicle is determined, so that the discharge power of the power battery is reasonably utilized, and the fluctuation of the power distributed to the driving motor caused by the instability of the actual power consumption of each high-voltage energy consumption component is avoided. Therefore, the utilization rate of the discharge power of the power battery is increased, and the driving comfort of the whole vehicle is improved.
Further, based on the first embodiment of the present invention, a second embodiment of the power battery power distribution method of the present invention is provided, in this embodiment, the step S200 of the above embodiment is a refinement of the step of defining the operating states of the high-voltage energy consumption components of the vehicle according to the preset power interval and the discharge power, and includes:
step a, classifying the high-voltage energy-consuming components of the vehicle according to a preset priority to obtain first high-voltage energy-consuming components and second high-voltage energy-consuming components;
in this embodiment, a priority rule is preset, and each high-voltage energy consumption component is classified and determined as each first high-voltage energy consumption component and each second high-voltage energy consumption component. The preset priority rule may be set for the working purpose of each high-voltage energy-consuming component, or may be set for the user requirement, or may be set for the power consumption of each high-voltage energy-consuming component during working. In one embodiment, a driving motor for driving a vehicle to run and a DC/DC converter for charging a low-voltage storage battery and supplying power to an on-board low-voltage electric appliance are used as a first high-voltage energy consumption component, and in order to ensure normal running of the vehicle and normal use of functions of the on-board low-voltage electric appliance, preferential distribution of power of the first high-voltage energy consumption component is ensured; other high-voltage energy consumption components which are not necessary to work when the vehicle runs, such as an air conditioner AC, a warm air blower PTC, a DC/AC converter and the like, are used as the second high-voltage energy consumption component. The first high-voltage high-energy component has a high power distribution priority and the second high-voltage energy-consuming component has a high power distribution priority. In another embodiment, there may be more high voltage energy consuming component divisions, such as a third high voltage energy consuming component, a fourth high voltage energy consuming component, and so on.
And b, limiting the working state of each first high-voltage energy consumption component and each second high-voltage energy consumption component according to a preset power interval and the discharge power.
And limiting the working states of each first high-voltage energy consumption component and each second high-voltage energy consumption component according to the preset power interval and the discharge power of the power battery. The operating states of the first high-voltage energy consumption components and the second high-voltage energy consumption components may be limited by setting a preset power interval, or different preset power intervals may be set for the first high-voltage energy consumption components and the second high-voltage energy consumption components, respectively. The range of the preset power interval can be calibrated according to the maximum discharge power of the power battery, and can also be a calibration mode which can be limited according to the working state of each high-voltage energy consumption component, such as a large number of experiments, working experience calibration and the like.
Through the division of the high-voltage energy consumption components, the power distribution priority of the high-voltage energy consumption components is set according to different division categories, and the discharge power can be utilized to the maximum extent under the condition that the discharge power of the power battery is limited, so that the comprehensive driving range of the vehicle is improved, and the driving experience is improved.
Further, the step of limiting the operating state of each of the first high-voltage energy-consuming components and each of the second high-voltage energy-consuming components according to a preset power interval and the discharge power includes:
step c, if the discharge power is larger than a second power maximum value corresponding to the second preset power interval, limiting the working state of each first high-voltage energy consumption component to be an allowable starting state; and limiting the working state of each second high-voltage energy consumption component to be an opening-allowed state.
The preset power interval includes a first preset power interval and a second preset power interval, the first preset power interval is a power interval set for limiting the working state of the first high-voltage energy consumption component, and the second preset power interval is a power interval set for limiting the working state of the second high-voltage energy consumption component. The preset power interval represents a value range from a power value minimum value to a power value maximum value in the interval, and a first power maximum value corresponding to a first preset power interval is smaller than a second power minimum value corresponding to a second preset power interval. The working state of the high-voltage energy consumption component can be an opening allowing state and an opening forbidding state, wherein the high-voltage energy consumption component determines the working state along with the switch state under the opening allowing state, namely the high-voltage energy consumption component is in normal working when the switch is opened, and stops working when the switch is closed; under the state of forbidding opening, the high-voltage energy consumption component does not determine the working state along with the opening and closing state, namely the high-voltage energy consumption component is in the working stop state when the opening and closing state is opened or closed. In another embodiment, the limitation of the operating state may also be other limitation modes such as a closing permission state and a closing prohibition state. When the discharge power of the power cell is at a maximum value at the beginning, for example, 30kW, the discharge power of the power cell will be in a state of consumption at this time.
And obtaining the discharge power of the power battery, comparing the discharge power with a second power maximum value corresponding to a second preset power interval, and limiting the working states of each first high-voltage energy consumption component and each second high-voltage energy consumption component to be an allowable opening state when the discharge power is greater than the second power maximum value corresponding to the second preset power interval.
D, continuously monitoring the discharge power, and limiting the working state of the second high-voltage energy consumption component to be a starting prohibition state when the discharge power is smaller than a second power minimum value corresponding to a second preset power interval;
and when the monitored discharge power is smaller than a second power minimum value corresponding to a second preset power interval, limiting the working state of the second high-voltage energy consumption component to be a starting prohibition state. When the power of the power battery is monitored to be in a back-up state and to be greater than or equal to a second power minimum value corresponding to a second preset power interval or to be consumed all the time and to be still greater than or equal to a second power minimum value corresponding to a second preset power interval, the working states of the first high-voltage energy-consuming component and the second high-voltage energy-consuming component are kept to be in an opening-allowed state.
And e, limiting the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval.
And when the monitored discharge power is smaller than a second power minimum value corresponding to a second preset power interval, limiting the working state of the first high-voltage energy consumption component according to the discharge power of the power battery and the first preset power interval.
The discharging power of the power battery is changed in real time, when the discharging power is smaller than a second power minimum value corresponding to a second preset power interval, the discharge power of the power battery does not necessarily completely supply the power consumption of all high-voltage energy consumption components, wherein, part of the high-voltage energy consumption components are switched back and forth between the working state and the non-working state along with the fluctuation of the discharge power of the power battery, and through setting a second preset interval, when the discharge power is smaller than a second power minimum value corresponding to a second preset power interval, setting the working state of the second high-voltage energy consumption component to be in a starting prohibition state, preferentially distributing the discharge power of the power battery to the first high-voltage energy consumption component, the normal running of the vehicle is ensured, the discharge power of the power battery is reasonably distributed, and the influence of the back-and-forth switching of the working states of the second part of high-voltage energy consumption components on the power battery and the high-voltage energy consumption components is reduced.
Specifically, the step of defining the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval includes:
step f, if the discharge power is larger than a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
when the discharge power is smaller than a second power minimum value corresponding to a second preset power interval, the discharge power of the power battery is continuously monitored, the discharge power of the power battery is obtained, the discharge power is compared with a first power maximum value corresponding to a first preset power interval, and when the discharge power is larger than a first power maximum value corresponding to a first preset power interval, the working states of all the first high-voltage energy consumption components are limited to be in an allowable starting state.
And g, continuously monitoring the discharge power, and limiting the working state of the first high-voltage energy consumption component to be a starting prohibition state if the discharge power is smaller than a first power minimum value corresponding to a first preset power interval.
And when the working state of the first high-voltage energy consumption component is the starting-allowed state, the discharging power of the power battery is consumed all the time, the discharging power of the power battery is continuously detected, the discharging power of the power battery is obtained, the discharging power is compared with a first power minimum value corresponding to a first preset power interval, and when the discharging power of the power battery is smaller than the first power minimum value corresponding to the first preset power interval, the working state of the first high-voltage energy consumption component is limited to be the starting-forbidden state. When the working state of the first high-voltage energy consumption component is the opening-allowed state, when the power of the power battery is monitored to be in the back-up state and is larger than or equal to a first power minimum value corresponding to a first preset power interval or is always consumed and is still larger than or equal to a first power minimum value corresponding to a first preset power interval, the working states of the first high-voltage energy consumption component and the first high-voltage energy consumption component are kept to be the opening-allowed state.
Through setting up first predetermined power interval, set up the operating condition of first high pressure power consumption part, can avoid when the power battery discharge power is not enough because the first high pressure power consumption part of power battery full power section is all in the open mode, and lead to the overdischarge of battery power to avoid causing irreversible harm to power battery, prolong power battery's life, ensure driving safety.
Further, after the step of defining the operating state of the first high-voltage energy-consuming component as the opening prohibition state, the method further includes:
step h, continuously monitoring the discharge power, and if the discharge power is greater than or equal to a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
when the discharge power of the power battery is increased to some extent and the discharge power of the power battery is greater than or equal to the first power maximum value corresponding to the first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an opening-allowed state; when the discharging power of the power battery is increased to some extent, but the discharging power of the power battery is still smaller than the first power maximum value corresponding to the first preset power interval, the working state of the first high-voltage energy consumption component is kept in the starting prohibition state.
Step i, judging whether the discharge power is larger than or equal to a second power maximum value corresponding to the second preset power interval;
and if the discharge power of the power battery rises back to some extent and the discharge power of the power battery is greater than or equal to a first power maximum value corresponding to a first preset power interval, performing numerical judgment between the discharge power of the power battery and a second power maximum value corresponding to a second preset power interval, and judging whether the discharge power is greater than or equal to the second power maximum value corresponding to the second preset power interval.
And j, if the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval, limiting the working state of the second high-voltage energy consumption component to be an allowable starting state.
If the discharge power of the power battery is greater than or equal to a second power maximum value corresponding to a second preset power interval, limiting the working state of the second high-voltage energy consumption component to be an allowable starting state; and if the discharge power of the power battery is still smaller than a second power maximum value corresponding to a second preset power interval, keeping the working state of the second high-voltage energy consumption component in a starting prohibition state, and limiting the working state of the second high-voltage energy consumption component to be in a starting permission state when the discharge power of the power battery is larger than or equal to the second power maximum value corresponding to the second preset power interval.
The working states of the first high-voltage energy consumption components and the second high-voltage energy consumption components are limited through the first preset power interval and the second preset power interval, the discharge power of the power battery is reasonably distributed, the discharge power of the power battery is preferentially distributed to the first high-voltage energy consumption components, so that the normal running of a vehicle is ensured, the influence on the power battery and the high-voltage energy consumption components due to the fact that the working states of the second part of the high-voltage energy consumption components are switched back and forth is reduced, the service life of the power battery is prolonged, and the driving safety is ensured.
Further, the step of obtaining all preset powers of the high-voltage energy consumption components according to the actual working state includes:
k, determining all operating high-voltage energy-consuming components of which the actual working states are opening states in all the high-voltage energy-consuming components;
the working state of each high-voltage energy consumption component is in a state of allowing to be started or forbidding to be started under the limitation of a preset power interval, wherein in the working state of allowing to be started, all switches of the high-voltage energy consumption components allowed to be started are not necessarily started, namely at the moment, the actual working state of the high-voltage energy consumption components started by the switches is in a starting state, and the actual working state of the high-voltage energy consumption components closed by the switches is in a closing state; when the switch is on or off, the high-voltage energy consumption component is in a stop working state, namely the actual working state of the high-voltage energy consumption component is in the off state under the working state of forbidding to be on. And acquiring the actual working state of each high-voltage energy consumption component, and determining each high-voltage energy consumption component corresponding to the actual working state as an opening state.
And step l, determining preset power corresponding to each running high-voltage energy consumption component except the driving motor.
And acquiring each preset power value corresponding to each high-voltage energy consumption component except the driving motor according to each high-voltage energy consumption component in the opening state in the determined actual working state. In this embodiment, the preset power value refers to a maximum power value of the high-voltage energy consumption component during normal operation, where the maximum power value is a power value calibrated before the vehicle leaves the factory for the working performance of each high-voltage energy consumption component, which is obtained through a large number of experiments and working experiences.
Through directly obtaining the preset power of each high-voltage energy consumption component, the calculation is not carried out according to the power actually consumed, the power fluctuation distributed to the driving motor due to the fact that the power actually consumed is unstable can be avoided, the vehicle is prevented from running with pause and frustration, and the driving comfort is improved.
Specifically, the step of determining the power distributed to the drive motor of the vehicle from the discharge power and each of the preset powers includes:
step m, calculating the sum of all the preset powers, calculating the difference between the discharge power and the sum, and taking the difference as a power difference;
and n, taking the product of the power difference value and a preset driving efficiency value as a power value distributed to a driving motor of the vehicle.
Referring to fig. 3, fig. 3 is a schematic diagram of a power distribution scheme of a power battery, including a total discharge power of the power battery, a first preset power interval, a preset driving efficiency value, a driving motor power, a preset power of a DC/DC converter, a preset power of an air conditioner AC, a preset power of a warm air blower PTC, and a preset power of the DC/AC converter. And calculating a power difference value according to the discharge power of the power battery and the acquired preset power of each high-voltage energy consumption component except the driving motor, so as to determine the power distributed to the driving motor according to the power difference value and the preset driving efficiency value. In one embodiment, the specific calculation of the power allocated to the driving motor is PM ＝(PB－P1－P2－P3－P4 )μ, wherein PMRepresents the power distributed to the drive motor; pBRepresenting the total discharge power of the power battery; p1Represents a preset power distributed to the DC/DC converter; p2Represents a preset power distributed to the air conditioner AC; p3Represents a preset power distributed to the PTC of the fan heater; p4Representing a preset power distributed to the DC/AC converter; μ denotes a preset driving efficiency value. In another embodiment, the sum of the preset powers of the high voltage energy consuming components may be calculated, and after the sum is obtained, the difference between the discharge power of the power battery and the sum is calculated, and the difference is taken as the power difference, thereby calculating the product of the power difference and the preset driving efficiency value, and taking the product as the power value allocated to the driving motor. The preset driving efficiency value is a preset driving system efficiency value which is a fixed value and is obtained through a large number of experiments and working experiences and calibrated before leaving a factory. In another embodiment, the drive system efficiency rate may also be a non-fixed rate that is set based on the actual operating conditions of the vehicle.
The power distributed to the driving motor is calculated through the discharging power of the power battery and the preset power corresponding to each high-voltage energy consumption component in the actual working state except the driving motor, the power of the power battery is reasonably distributed, the power is calculated according to the preset power of each high-voltage energy consumption component, the power which is not actually consumed is not calculated, the power fluctuation distributed to the driving motor due to the fact that the actually consumed power is unstable can be avoided, the vehicle is prevented from being subjected to pause and contusion, and the driving experience is improved.
In addition, the invention also provides a computer readable storage medium, wherein the power battery power distribution program is stored on the computer readable storage medium. The computer-readable storage medium may be the Memory 20 in the terminal of fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes instructions for causing a vehicle with a processor to execute the power distribution method of the power battery according to the embodiments of the present invention.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power battery power distribution method is characterized by comprising the following steps:
acquiring the discharge power of a power battery;
limiting the working state of each high-voltage energy consumption component of the vehicle according to a preset power interval and the discharge power;
determining the actual working state of each high-voltage energy-consuming component according to the limited working state, and acquiring all preset power of each high-voltage energy-consuming component according to the actual working state;
and determining power distributed to a driving motor of the vehicle according to the discharge power and each preset power.
2. The power battery power distribution method according to claim 1, wherein the step of defining the operating states of the high-voltage energy-consuming components of the vehicle according to the preset power interval and the discharge power comprises:
classifying the high-voltage energy-consuming components of the vehicle according to a preset priority to obtain first high-voltage energy-consuming components and second high-voltage energy-consuming components;
and limiting the working state of each first high-voltage energy consumption component and each second high-voltage energy consumption component according to a preset power interval and the discharge power.
3. The power battery power distribution method according to claim 2, wherein the preset power interval comprises a second preset power interval, and the step of limiting the working state of each first high-voltage energy-consuming component and each second high-voltage energy-consuming component according to the preset power interval and the discharge power comprises:
if the discharge power is greater than a second power maximum value corresponding to the second preset power interval, limiting the working state of each first high-voltage energy consumption component to be an allowable starting state;
and limiting the working state of each second high-voltage energy consumption component to be an opening-allowed state.
4. The power battery power distribution method according to claim 3, wherein the preset power interval includes a first preset power interval, a first maximum power value corresponding to the first preset power interval is smaller than a second minimum power value corresponding to the second preset power interval, and after the step of limiting the operating state of each second high-voltage energy-consuming component to be an open-allowed state, the method further includes:
continuously monitoring the discharge power, and if the discharge power is smaller than a second power minimum value corresponding to a second preset power interval, limiting the working state of the second high-voltage energy consumption component to be a starting prohibition state;
and limiting the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval.
5. The power battery power distribution method according to claim 4, wherein the step of defining the working state of the first high-voltage energy consumption component according to the discharge power and the first preset power interval comprises:
if the discharge power is larger than a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
and continuously monitoring the discharge power, and if the discharge power is smaller than a first power minimum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be a starting prohibition state.
6. The power battery power distribution method according to claim 5, wherein after the step of defining the operation state of the first high-voltage energy-consuming component as an on-prohibition state, the method further comprises:
continuously monitoring the discharge power, and if the discharge power is greater than or equal to a first power maximum value corresponding to a first preset power interval, limiting the working state of the first high-voltage energy consumption component to be an allowable starting state;
judging whether the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval;
and if the discharge power is greater than or equal to a second power maximum value corresponding to the second preset power interval, limiting the working state of the second high-voltage energy consumption component to be an allowable starting state.
7. The power battery power distribution method according to any one of claims 1 to 5, wherein the step of obtaining all preset powers of the high-voltage energy consumption components according to the actual working state comprises:
determining all operating high-voltage energy-consuming components of which the actual working states are opening states in all the high-voltage energy-consuming components;
and determining the preset power corresponding to each running high-voltage energy consumption component except the driving motor.
8. The power battery power distribution method according to claim 7, wherein the step of determining the power distributed to the drive motor of the vehicle based on the discharge power and the respective preset powers includes:
calculating the sum of the preset powers, calculating the difference between the discharge power and the sum, and taking the difference as a power difference;
and taking the product of the power difference value and a preset driving efficiency value as a power value distributed to a driving motor of the vehicle.
9. A vehicle comprising a memory, a processor, and a power cell power distribution program stored on the memory and operable on the processor, wherein: the power battery power distribution program when executed by the processor implements the steps of the power battery power distribution method of any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that a power battery power distribution program is stored on the computer-readable storage medium, which when executed by a processor implements the steps of the power battery power distribution method according to any one of claims 1 to 8.
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