CN114750715A - Power management system, management method and device thereof and vehicle - Google Patents
Power management system, management method and device thereof and vehicle Download PDFInfo
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- CN114750715A CN114750715A CN202111481183.XA CN202111481183A CN114750715A CN 114750715 A CN114750715 A CN 114750715A CN 202111481183 A CN202111481183 A CN 202111481183A CN 114750715 A CN114750715 A CN 114750715A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/0315—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using multiplexing techniques
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Abstract
The invention discloses a power management system, a management method and a management device thereof and a vehicle. The system comprises a main power supply loop and a standby power loop; the main power supply supplies power to a load through a main power supply loop, wherein the load comprises an external equipment unit, a vehicle machine unit and an instrument unit; the standby power loop comprises a standby power supply, a first switch and a second switch; the standby power supply is connected with the external equipment unit through a first switch and is connected with the vehicle machine unit and the instrument unit in parallel through a second switch; the vehicle-mounted unit is used for respectively monitoring real-time power supply parameters of a main power supply and a standby power supply and determining the current state information of the main power supply based on the real-time power supply parameters; and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply. Through the system, the main power supply and the standby power supply can be switched to supply power according to the real-time power supply state of the main power supply, so that the power supply stability of the power supply is improved, and the normal operation of the system function of the vehicle is ensured.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a power management system, a management method and a management device thereof and a vehicle.
Background
With the development of intellectualization in the field of vehicles, a vehicle system based on one machine and multiple screens is gradually applied to vehicles, and a display device in the vehicle system and an instrument system of the vehicle are used as safety components for realizing an interactive display function, so that once power supply abnormality occurs in the driving process, great potential safety hazards are brought to drivers. Therefore, ensuring the functional safety of the instrument system and the vehicle machine system is a key technology of power management.
The existing power supply technology mainly considers the requirements of the whole vehicle power distribution and application scenes, and usually switches the power supply state of a vehicle system based on external input signals such as key state signals, CAN network states and the like. However, the power supply method does not consider the influence of the change of the internal operation state of the vehicle system on the power supply of the power supply, so that the functional safety of the vehicle system cannot be fully ensured.
Disclosure of Invention
The invention provides a power supply management system, a management method and a management device thereof and a vehicle, which are used for improving the power supply stability of a power supply and ensuring the functional safety of a vehicle system.
In a first aspect, the present invention provides a power management system, including: a main power supply loop and a standby power supply loop;
the main power supply supplies power to a load through the main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit;
the standby power loop comprises a standby power supply, a first switch and a second switch; wherein the content of the first and second substances,
the standby power supply is connected with the external equipment unit through the first switch, and is connected with the vehicle machine unit and the instrument unit in parallel through the second switch;
the vehicle-mounted unit is used for monitoring real-time power supply parameters of the main power supply and the standby power supply respectively and determining the current state information of the main power supply based on the real-time power supply parameters;
and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
In a possible implementation manner, the car machine unit is specifically configured to:
determining whether the main power supply is abnormal in power supply at present according to the current state information of the main power supply;
when the main power supply is abnormal currently, the first switch is controlled to be switched off, and the second switch is controlled to be switched on.
In a possible implementation manner, the car machine unit is specifically further configured to:
respectively acquiring real-time power supply parameters of the main power supply and the standby power supply;
judging whether the difference value of the real-time power supply parameter of the main power supply and the real-time power supply parameter of the standby power supply exceeds a preset reference threshold value or not;
and if the difference value exceeds a preset reference threshold value, determining that the main power supply is abnormal currently.
In a possible implementation manner, the car machine unit is further configured to:
and when the main power supply is abnormal currently, the main power supply loop between the main power supply and the load is controlled to be disconnected.
In a second aspect, the present invention provides a power management method, including:
respectively monitoring real-time power supply parameters of a main power supply and a standby power supply; wherein the content of the first and second substances,
the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit;
the standby power supply is connected with the external equipment unit through a first switch of a standby power loop, and is connected with the vehicle unit and the instrument unit in parallel through a second switch of the standby power loop;
determining current state information of the main power supply based on the real-time power supply parameters;
and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
In a possible implementation manner, the controlling the on/off states of the first switch and the second switch according to the current state information of the main power supply specifically includes:
determining whether the main power supply is abnormal currently or not according to the current state information of the main power supply;
when the main power supply is abnormal currently, the first switch is controlled to be switched off, and the second switch is controlled to be switched on.
In a possible implementation manner, the determining, according to the current state information of the main power supply, whether the main power supply is currently abnormal in power supply includes:
respectively acquiring real-time power supply parameters of the main power supply and the standby power supply;
judging whether the difference value of the real-time power supply parameter of the main power supply and the real-time power supply parameter of the standby power supply exceeds a preset reference threshold value or not;
and if the difference value exceeds a preset reference threshold value, determining that the main power supply is abnormal currently.
In one possible implementation, the method further includes:
and when the main power supply is abnormal currently, the main power supply loop between the main power supply and the load is controlled to be disconnected.
In a third aspect, the present invention provides a power management device, including:
the monitoring module is used for respectively monitoring the real-time power supply parameters of the main power supply and the standby power supply; the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle unit and an instrument unit; the standby power supply is connected with the external equipment unit through a first switch of a standby power loop, and is connected with the vehicle machine unit and the instrument unit in parallel through a second switch of the standby power loop;
the determining module is used for determining the current state information of the main power supply based on the real-time power supply parameters;
and the control module is used for controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
In a fourth aspect, the present invention provides a vehicle comprising:
one or more processors;
a memory coupled to the processor for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the power management method of the second aspect.
Compared with the prior art, the invention has the following beneficial effects:
according to the power management system and the power management device provided by the invention, by realizing the power management method provided by the invention, the power supply state of the main power supply of the vehicle machine can be monitored in real time, and when the power supply of the main power supply is abnormal, the standby power supply is timely switched to supply power for the vehicle machine system and the instrument system, so that the vehicle still keeps the system function normal operation under the condition of abnormal power failure of the main power supply, and the power supply stability is effectively improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a state diagram of vehicle power management provided by an embodiment of the present invention;
FIG. 2 is a flow chart of a power management method according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a power management device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power management system according to an embodiment of the present invention;
FIG. 5 is an electrical schematic of a power management system provided by one embodiment of the present invention;
fig. 6 is a block diagram of a power management device according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and the detailed description to provide a power management system, a management method, a device and a vehicle thereof.
With the rapid development of vehicles in the direction of networking and intellectualization, a vehicle-mounted system with multiple screens is gradually applied to vehicles to provide more comprehensive interactive display and interactive functions for drivers and passengers. Therefore, based on the management requirement of vehicle functional safety, it is often necessary to ensure that related fault and warning content can still be normally displayed through an instrument system or a vehicle machine system within a short time when a vehicle system has abnormal power supply, so as to ensure that a driver and a passenger can obtain fault information in real time and drive to a safe area. Therefore, the embodiment of the invention provides a power supply management method based on vehicle system function safety.
Please refer to fig. 1 and fig. 2. In this embodiment, a car power management state diagram may be determined according to a power on/off management logic, as specifically shown in fig. 1. The vehicle power management state type CAN be divided into a power off state, a power connection state, a cold start, an initialization, a normal mode, a partial function mode, a standby mode, a quick start mode, a power-down mode, a sleep mode and a function safety mode.
The vehicle-mounted device power management state diagram is a vehicle-mounted device power management state diagram shown in fig. 1, wherein the power state signal is determined according to a connection state between the vehicle-mounted device and a power supply, and when the vehicle-mounted device state signal indicates that the vehicle-mounted device is powered on, the power state corresponds to a power connection state in the vehicle-mounted device power management state diagram shown in fig. 1; and when the vehicle machine state signal indicates that the vehicle machine is powered off, the power off state in the power management state diagram corresponds to.
In addition, when the key state signal is sent and changed, the vehicle machine is switched to a corresponding power management state according to the key state signal. Illustratively, when the key state signal is ACC/ON/Crank, the vehicle power supply starts to be in a cold start state, then the vehicle power supply is initialized, and finally the vehicle power supply enters a normal working mode. When the vehicle runs in a normal working mode, if the key state signal is switched to OFF at the moment, the vehicle is correspondingly switched to a partial function mode, and in the mode, the vehicle machine only allows partial functions to work, such as alarming, making an emergency call and the like; when the vehicle runs in a partial function mode, the key state signal is switched back to ACC/ON/Crank, and the vehicle machine power supply returns to a normal mode; when the vehicle is in a quick starting mode, and the key state signal is ACC/ON/Crank, the vehicle machine power supply quickly returns to a normal mode.
The CAN network is a network for real-time communication of the vehicle machine, and when the CAN network is in an activated state and completes initialization, the vehicle machine power management CAN enter a normal mode, a partial function mode or a standby mode. When the vehicle-mounted power management state is in a standby mode, if the CAN network is not activated, the vehicle-mounted power management enters a quick start mode.
It should be noted that, in this embodiment, it is considered that when the vehicle needs to be restarted again after powering off, the number of loading contents is often large, which easily results in a long vehicle start time, so a fast start mode is correspondingly added in the vehicle power management, so that the vehicle system can be started quickly when the vehicle is restarted after powering off, thereby providing a good interaction experience for the driver.
On the other hand, in the embodiment, when power supply abnormality of the vehicle-mounted machine power supply occurs, it is generally difficult to ensure the functional safety of the vehicle-mounted machine and the instrument panel, so that a functional safety mode is added in vehicle-mounted machine power supply management, when the power supply of the vehicle system is abnormal, the vehicle-mounted machine power supply can enter the functional safety mode, and at this time, the vehicle-mounted machine system is switched to the standby power supply to supply power until the vehicle is powered off.
In the above functional safety mode, the method for managing the car machine power supply specifically includes the following steps:
s1: respectively monitoring real-time power supply parameters of a main power supply and a standby power supply; the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit; the standby power supply is connected with the external equipment unit through a first switch of the standby power circuit, and connected with the vehicle unit and the instrument unit in parallel through a second switch of the standby power circuit.
In this embodiment, the car machine power supply consists of a main power supply and a standby power supply, wherein the main power supply is used for supplying power to the car machine and associated external equipment, display equipment and the like, so that the car machine system runs normally; the backup power supply is used to provide a short-time power supply in case of an abnormal condition of the main power supply.
It can be understood that, after the vehicle is powered on, when the vehicle-mounted power supply is in the non-functional safety mode, the current power supply parameters of the main power supply and the standby power supply need to be monitored in real time, so as to ensure that the vehicle-mounted power supply management can quickly enter the functional safety mode when the monitoring result is abnormal.
S2: determining current status information of the primary power source based on the real-time power supply parameters.
In this embodiment, the monitored real-time power supply parameter specifically refers to current output voltage values of the main power supply and the standby power supply, and specifically, the current operating state of the main power supply can be determined in real time based on the current output voltage value of the standby power supply and the current output voltage value of the main power supply by taking the current output voltage value of the standby power supply as a power supply reference value.
In some optional embodiments, when receiving the current output voltage values of the main power supply and the standby power supply, it is necessary to determine in real time whether a difference between the current output voltage value of the main power supply and the current output voltage value of the standby power supply exceeds a preset reference threshold, and if the difference exceeds the preset reference threshold, it is determined that a power supply abnormal condition currently occurs in the main power supply, and at this time, the vehicle-mounted power supply management needs to enter a functional safety mode.
S3: and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
Specifically, whether the power supply abnormality occurs to the main power supply can be determined according to the current state information of the main power supply; when the main power supply is abnormal, the car machine power supply management enters a functional safety mode, at the moment, the main power supply loop between the main power supply and the load needs to be controlled to be disconnected, and is synchronously switched to a standby power supply to supply power to the car machine system and the instrument system until a key state signal is received, and at the moment, the car machine system is directly powered OFF.
It should be noted that, when the standby power is switched to perform short-time power supply, the first switch in the synchronous control preparation circuit is turned off, and the second switch is turned on, so that the functions of the vehicle system are maintained to operate normally, and the driving safety is ensured.
The backup power supply is used as a short-time power supply device, and the electric quantity of the backup power supply is often limited, so that when the power supply of the main power supply is abnormal, the electric quantity of the backup power supply needs to ensure that the core function of the vehicle system can be normally performed. That is to say, the standby power supply needs to be used for supplying power to the microprocessor (MCU chip), the system on chip (SOC chip), the CAN bus, the display screen, the memory, and the instrument display screen of the vehicle that maintain the normal operation of the core function of the vehicle system, therefore, while this embodiment switches to the standby power supply to supply power to the vehicle unit and the instrument unit, the vehicle system still needs to control the speaker of the vehicle to mute, and synchronously disconnect the path between each external device and the vehicle power supply, that is, all the external devices of the vehicle system are powered off, so as to reduce the loss of the external devices to the electric quantity of the standby power supply, and ensure the functional safety of the vehicle system and the instrument system.
In summary, the power management method provided by the above embodiment of the present invention can complete the switching between the main power source and the standby power source based on the real-time monitoring result of the main power source, so that the main power source can be switched to the standby power source in time to supply power to the vehicle system and the instrument system when the power supply of the main power source is abnormal, and the vehicle system and the instrument screen can still keep normal operation under the condition of abnormal power failure of the main power source, thereby effectively improving the stability of power supply of the vehicle system.
Referring to fig. 3, another embodiment of the present invention further provides a power management apparatus, which includes a monitoring module 101, a determining module 102, and a control module 103.
The monitoring module 101 is used for monitoring real-time power supply parameters of a main power supply and a standby power supply respectively; the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit; the standby power supply is connected with the external equipment unit through a first switch of the standby power circuit, and connected with the vehicle machine unit and the instrument unit in parallel through a second switch of the standby power circuit.
In this embodiment, the car machine power supply is composed of a main power supply and a standby power supply. The main power supply is used for supplying power to the vehicle machine and associated external equipment, display equipment and the like, so that a vehicle machine system can normally run; the backup power supply is used to provide a short-time power supply in case of an abnormal condition of the main power supply.
It can be understood that, after the vehicle is powered on, when the vehicle-mounted device power supply is in the non-functional safety mode, the monitoring module 101 needs to monitor the current power supply parameters of the main power supply and the standby power supply in real time, so as to ensure that the vehicle-mounted device power supply management can quickly enter the functional safety mode when the monitoring result is abnormal.
The determining module 102 is configured to determine the current status information of the main power source 11 based on the real-time power supply parameter.
In this embodiment, the real-time power supply parameter monitored by the monitoring module 101 specifically refers to the current output voltage values of the main power supply and the standby power supply, and specifically, the current working state of the main power supply is determined in real time based on the current output voltage value of the standby power supply and the current output voltage value of the main power supply by taking the current output voltage value of the standby power supply as a power supply reference value.
In some optional embodiments, when the monitoring module 101 receives current output voltage values of the main power supply and the backup power supply, the determining module 102 needs to determine in real time whether a difference between the current output voltage value of the main power supply and the current output voltage value of the backup power supply exceeds a preset reference threshold, and if the difference exceeds the preset reference threshold, it is determined that a power supply abnormal condition currently occurs in the main power supply, and at this time, the vehicle power supply management needs to enter a functional safety mode.
The control module 103 is configured to control the on/off states of the first switch and the second switch according to the current state information of the main power supply 11.
Specifically, the control module 103 may determine whether the power supply abnormality occurs to the main power supply according to the current state information of the main power supply; when the main power supply is abnormal, the car machine power supply management enters a functional safety mode, at this time, the control module 103 needs to control the disconnection of a main power supply loop between the main power supply and the load, and synchronously switches to a standby power supply to supply power to the car machine system and the instrument system until a key state signal is received, and at this time, the car machine system is directly powered OFF.
It should be noted that, in the embodiment, when the control module 103 switches the backup power supply to perform short-time power supply, the first switch in the backup circuit is synchronously controlled to be turned off, and the second switch is synchronously controlled to be turned on, so that the functions of the vehicle system are maintained to operate normally, and the driving safety is ensured.
The backup power supply is used as a short-time power supply device, and the electric quantity of the backup power supply is often limited, so that when the power supply of the main power supply is abnormal, the electric quantity of the backup power supply needs to ensure that the core function of the vehicle system can be normally performed. That is to say, the standby power supply needs to be used for supplying power to the microprocessor (MCU chip), the system on chip (SOC chip), the CAN bus, the display screen, the memory, and the instrument display screen of the vehicle, which maintain the normal operation of the core function of the vehicle system, so that the control module 103 in this embodiment switches to the standby power supply to supply power to the vehicle unit and the instrument unit, and simultaneously controls the speaker of the vehicle to mute, and synchronously disconnects the path between each external device and the vehicle power supply, that is, all the external devices of the vehicle system are powered off, so as to reduce the loss of the external devices to the power of the standby power supply, and ensure the functional safety of the vehicle system and the instrument system.
The power management device provided by the embodiment of the invention can complete the switching between the main power supply and the standby power supply based on the real-time monitoring result of the main power supply, so that the main power supply can be switched to the standby power supply to supply power to the vehicle machine system and the instrument system in time when the power supply of the main power supply is abnormal, and the vehicle machine and the instrument screen can still keep normal operation under the condition of abnormal power failure of the main power supply, thereby effectively improving the power supply stability of the vehicle system.
Referring to fig. 4, an embodiment of the present invention further provides a power management system, which includes a main power supply loop and a standby power supply loop. The main power supply 11 supplies power to a load 13 through the main power supply loop, and the load 13 includes an external device unit 131, a vehicle unit 132, and a meter unit 133.
Under the condition that the power supply is normally supplied, the main power supply 11 is mainly used for supplying power to the vehicle machine, the instrument panel and the external equipment so as to ensure that each function of a vehicle system is safe and normally operated.
In order to ensure that the vehicle system can still stably operate under the condition of abnormal power supply, the power management system provided by the embodiment is provided with a standby power loop for the load 13, wherein the standby power loop comprises a standby power supply 12, a first switch and a second switch; the standby power supply 12 is connected to the external device unit 131 through the first switch, and is connected to the in-vehicle unit 132 and the meter unit 133 in parallel through the second switch.
In this embodiment, the car-on-board unit 132 is configured to monitor real-time power supply parameters of the main power supply 11 and the standby power supply 12, and determine current state information of the main power supply 11 based on the monitored real-time power supply parameters of the main power supply 11 and the monitored real-time power supply parameters of the standby power supply 12; and controlling the on/off states of the first switch and the second switch according to the current state information of the main power supply 11.
In some optional embodiments, the in-vehicle unit 132 is specifically configured to: determining whether the main power supply 11 is abnormal in power supply currently according to the current state information of the main power supply 11; when the power supply abnormality currently occurs in the main power supply 11, the first switch is controlled to be turned off, and the second switch is controlled to be turned on.
Specifically, the car machine unit 132 may respectively obtain real-time power supply parameters of the main power supply 11 and the standby power supply 12, and determine whether a difference between the real-time power supply parameter of the main power supply 11 and the real-time power supply parameter of the standby power supply 12 exceeds a preset reference threshold, and if the difference exceeds the preset reference threshold, determine that the main power supply 11 is currently abnormal in power supply.
It can be understood that, if it is determined that the main power supply 11 is in a normal power supply state for the load 13 based on the current state information of the main power supply 11, the in-vehicle unit 132 keeps monitoring the real-time power supply parameters of the main power supply 11 and the standby power supply 12 to ensure that the power supply abnormality of the main power supply 11 can be found in time; when it is determined that the power supply of the main power supply 11 is abnormal currently according to the real-time monitoring result, the in-vehicle unit 132 controls the main power supply loop between the main power supply 11 and the load 13 to be disconnected, and synchronously switches to the standby power supply 12 to supply power to the in-vehicle unit 132 and the meter unit 133.
FIG. 5 is a schematic diagram illustrating an electrical layout of a power management system in accordance with an exemplary embodiment. As shown in fig. 5, the power management system includes a backup power source and a backup power loop; the standby power supply controls the power supply of the external equipment through one group of diodes and is connected with the vehicle unit and the instrument unit in parallel through the other group of diodes so as to realize the switching power supply between the main power supply and the standby power supply.
Specifically, the meter unit described in this embodiment includes a meter screen; the external equipment unit comprises external equipment such as a USB, a loudspeaker, a DSP and the like; the vehicle unit comprises a voltage comparator, a micro processor unit (MCU chip), a system on chip (SOC chip) and a CAN bus. The MCU chip is used for carrying out system control and external communication; the CAN bus is connected with the MCU chip and used for receiving signals of the whole vehicle and transmitting the signals to the MCU chip; and the voltage comparator is connected with the MCU chip and is used for comparing the acquired current power supply parameters of the main power supply and the current power supply parameters of the standby power supply in real time.
It can be understood that the main power supply normally supplies power to each external device, the vehicle unit and the instrument unit through the main power supply loop, and when the current power supply state of the main power supply is determined to be abnormal according to the output result of the voltage comparator, the MCU chip responds to a power supply switching instruction, disconnects the main power supply loop between the main power supply and the load, and simultaneously switches on the standby power supply and diodes between the vehicle unit and the instrument unit so as to provide short-time power supply for the vehicle unit and the instrument unit through the standby power supply. Meanwhile, the diode between the standby power supply and the external equipment unit is in a disconnected state, so that the external equipment does not consume the electric quantity of the standby power supply, and the safe and normal running of the vehicle system is guaranteed.
It should be noted that, the abnormal current power supply state of the main power supply includes, but is not limited to, the abnormal power off of the main power supply, and other abnormal power supply situations of the main power supply also fall within the scope of the description of the present invention.
In this embodiment, the main power supply and the backup power supply are both 12V batteries, and therefore, when the main power supply or the backup power supply is used to supply power to the load, power conversion is required.
The power management system provided by the embodiment of the invention can realize stable power supply to the car machine and the instrument panel and ensure the driving safety of the car by accurately monitoring the power supply state of the main power supply in real time.
Referring to fig. 6, a vehicle is further provided in an embodiment of the present invention. As shown in fig. 6, the vehicle may include: one or more processors, and a memory. A memory is coupled to the processor for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the power management method according to any of the embodiments, and achieve the technical effects consistent with the method.
The processor is used for controlling the overall operation of the vehicle so as to complete all or part of the steps of the power management method. The memory is used to store various types of data to support operation at the vehicle, which may include, for example, instructions for any application or method operating on the vehicle, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk.
In an exemplary embodiment, the vehicle may be implemented by one or more Application Specific 1 integrated circuits (AS 1C), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described power management methods and achieving technical effects consistent with the above-described methods.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the power management method described above is also provided. For example, the computer readable storage medium may be the memory described above that includes program instructions executable by a processor of a vehicle to perform the power management method described above and to achieve technical effects consistent with the method described above.
It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. The terms "first", "second", and the like in the present invention are used for distinguishing different objects, not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The above description is only an 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 performed by the present invention and the contents of the attached 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 management system, comprising: a main power supply loop and a standby power loop;
the main power supply supplies power to a load through the main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit;
the standby power loop comprises a standby power supply, a first switch and a second switch; wherein the content of the first and second substances,
the standby power supply is connected with the external equipment unit through the first switch, and is connected with the vehicle machine unit and the instrument unit in parallel through the second switch;
the vehicle-mounted unit is used for monitoring real-time power supply parameters of the main power supply and the standby power supply respectively and determining the current state information of the main power supply based on the real-time power supply parameters;
and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
2. The power management system of claim 1, wherein the in-vehicle unit is specifically configured to:
determining whether the main power supply is abnormal currently or not according to the current state information of the main power supply;
when the power supply of the main power supply is abnormal, the first switch is controlled to be switched off, and the second switch is controlled to be switched on.
3. The power management system of claim 2, wherein the in-vehicle unit is further configured to:
respectively acquiring real-time power supply parameters of the main power supply and the standby power supply;
judging whether the difference value of the real-time power supply parameter of the main power supply and the real-time power supply parameter of the standby power supply exceeds a preset reference threshold value or not;
and if the difference value exceeds a preset reference threshold value, determining that the main power supply is abnormal currently.
4. The power management system of claim 2 or 3, wherein the in-vehicle unit is further configured to:
when the power supply of the main power supply is abnormal, the main power supply loop between the main power supply and the load is controlled to be disconnected.
5. A method of power management, comprising:
respectively monitoring real-time power supply parameters of a main power supply and a standby power supply; wherein the content of the first and second substances,
the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle machine unit and an instrument unit;
the standby power supply is connected with the external equipment unit through a first switch of a standby power loop, and is connected with the vehicle machine unit and the instrument unit in parallel through a second switch of the standby power loop;
determining current state information of the main power supply based on the real-time power supply parameters;
and controlling the on-off state of the first switch and the second switch according to the current state information of the main power supply.
6. The power management method according to claim 5, wherein the controlling the on/off states of the first switch and the second switch according to the current state information of the main power supply specifically comprises:
determining whether the main power supply is abnormal currently or not according to the current state information of the main power supply;
when the power supply of the main power supply is abnormal, the first switch is controlled to be switched off, and the second switch is controlled to be switched on.
7. The power management method according to claim 6, wherein the determining whether the main power source is currently in power supply abnormality according to the current state information of the main power source specifically includes:
respectively acquiring real-time power supply parameters of the main power supply and the standby power supply;
judging whether the difference value of the real-time power supply parameter of the main power supply and the real-time power supply parameter of the standby power supply exceeds a preset reference threshold value or not;
and if the difference value exceeds a preset reference threshold value, determining that the main power supply is abnormal currently.
8. The power management method according to claim 6 or 5, further comprising:
when the power supply of the main power supply is abnormal, the main power supply loop between the main power supply and the load is controlled to be disconnected.
9. A power management device, comprising:
the monitoring module is used for respectively monitoring the real-time power supply parameters of the main power supply and the standby power supply; the main power supply supplies power to a load through a main power supply loop, and the load comprises an external equipment unit, a vehicle unit and an instrument unit; the standby power supply is connected with the external equipment unit through a first switch of a standby power loop, and is connected with the vehicle machine unit and the instrument unit in parallel through a second switch of the standby power loop;
the determining module is used for determining the current state information of the main power supply based on the real-time power supply parameters;
and the control module is used for controlling the on-off states of the first switch and the second switch according to the current state information of the main power supply.
10. A vehicle, characterized by comprising,
one or more processors;
a memory coupled to the processor for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a power management method as claimed in any one of claims 5 to 8.
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| CN202111481183.XA CN114750715A (en) | 2021-12-06 | 2021-12-06 | Power management system, management method and device thereof and vehicle |
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