CN219499028U - Redundant low-voltage power supply device and vehicle - Google Patents

Abstract

The utility model provides a redundant low-voltage power supply device and a vehicle, comprising: the DCDC conversion module is used for converting the power supply voltage into a power supply voltage which can be normally started by the vehicle; one end of the first power supply module is connected with the DCDC conversion module, the other end of the first power supply module is connected with the vehicle electric load and the safety control load and is used for forming a first power supply loop so as to supply power for the vehicle electric load and the safety control load, and the other end of the first power supply module is connected with the standby safety load and is used for forming a second power supply loop so as to supply power for the standby safety load; the isolation module is used for switching on or switching off the first power supply module to supply power for the standby safety load; the second power supply module is conducted when the first power supply loop fails to supply power for the standby safety load. The utility model can automatically stop the vehicle by the side or stop the vehicle in an emergency way, thereby meeting the power supply redundancy requirement of the vehicle and improving the safety of automatic driving.

Description

Redundant low-voltage power supply device and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a redundant low-voltage power supply device and a vehicle.

Background

With the continuous development of intelligent and automatic driving of vehicles, the demands of users for driving comfort and safety are continuously increasing, for example, hands and eyes of a driver are liberated, and automatic driving of the vehicles is realized.

However, with the low-voltage power grid system, when the main power supply circuit fails, the whole vehicle is powered off, and all the electric system functions fail, so that the availability requirement of the electric functions of the vehicle cannot be met, the autonomous driving control part of the vehicle cannot work normally, the vehicle is at a risk of out of control, and the automatic driving safety is affected.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art.

It is therefore an object of the present utility model to provide a redundant low voltage power supply device that can improve the safety of automatic driving while meeting the power redundancy requirements of a vehicle.

To this end, a second object of the utility model is to propose a vehicle.

In order to achieve the above object, an embodiment of a first aspect of the present utility model proposes a redundant low-voltage power supply apparatus including: the DCDC conversion module is used for converting the power supply voltage into a power supply voltage which can be normally started by the vehicle; the system comprises a DCDC conversion module, a first power supply module, a second power supply module and a second power supply module, wherein one end of the first power supply module is connected with the DCDC conversion module, the other end of the first power supply module is connected with a vehicle electric load and a safety control load and is used for forming a first power supply loop so as to supply power for the vehicle electric load and the safety control load, and the other end of the first power supply module is connected with a standby safety load and is used for forming a second power supply loop so as to supply power for the standby safety load; the isolation module is connected with the DCDC conversion module and the first power supply module at one end and used for switching on or switching off the power supply of the first power supply module for the standby safety load; the second power supply module, the one end of second power supply module with the other end of isolation module is connected, the other end of second power supply module with reserve safety load is connected, the second power supply module switches on when first power supply return circuit trouble, in order to supply power for reserve safety load.

According to the redundant low-voltage power supply device provided by the embodiment of the utility model, the isolation module and the second power supply module are added, when the power supply device is normal, the first power supply module is used for supplying power to a vehicle load, when any power supply loop fails, the second power supply module is controlled to be closed, the isolation module is controlled to be opened, the failure loop is opened, the second power supply module is used for supplying power to a standby safety load, and the braking or steering control of the vehicle is realized through the standby safety load, so that the vehicle can automatically stop by the side or stop in an emergency way, and the safety of automatic driving is improved while the power supply redundancy requirement of the vehicle is met.

In some embodiments, the isolation module comprises: one end of the first switching tube is connected with one end of the first power supply module, and the other end of the first switching tube is connected with one end of the second power supply module and is used for switching on or switching off the first power supply module to supply power for the standby safety load; and one end of the first control unit is connected with one end of the first switching tube, and the other end of the first control unit is connected with the other end of the first switching tube and is used for receiving a fault signal of the first power supply loop.

In some embodiments, the first power module includes: one end of the first battery unit is connected with one end of the isolation module, and the other end of the first battery unit is grounded and is used for supplying power to the first power supply loop and the second power supply loop when the isolation module is conducted; and one end of the first battery monitoring unit is connected with one end of the isolation module, and the other end of the first battery monitoring unit is connected with one end of the first battery unit and is used for monitoring state parameters of the first battery unit.

In some embodiments, the second power module includes: one end of the second battery unit is connected with the other end of the isolation module, and the other end of the second battery unit is grounded and is used for supplying power to the second power supply loop when the isolation module is disconnected; and one end of the second battery monitoring unit is connected with the other end of the isolation module, and the other end of the second battery monitoring unit is connected with one end of the second battery unit and is used for monitoring the state parameters of the second battery unit.

In some embodiments, the first battery monitoring unit includes: one end of the second switching tube is connected with one end of the isolation module, and the other end of the second switching tube is connected with one end of the first battery unit and used for switching on or switching off the first battery unit; and one end of the second control unit is connected with one end of the second switching tube, and the other end of the second control unit is connected with the other end of the second switching tube and is used for switching on or switching off the second switching tube.

In some embodiments, the second battery monitoring unit includes: one end of the third switching tube is connected with the other end of the isolation module, and the other end of the third switching tube is connected with one end of the second battery unit and used for switching on or switching off the second battery unit; and one end of the third control unit is connected with one end of the third switching tube, and the other end of the third control unit is connected with the other end of the third switching tube and used for switching on or switching off the third switching tube.

In some embodiments, the safety control load comprises at least one of the following: the automatic driving controller is connected with one end of the first power supply module; the automatic driving sensor is connected with one end of the first power supply module; the brake system is connected with one end of the first power supply module; and one end of the steering system is connected with one end of the first power supply module.

In some embodiments, the backup safety load comprises at least one of the following: the auxiliary driving controller is connected with one end of the first power supply module; the auxiliary driving sensor is connected with one end of the first power supply module; the redundant braking system is connected with one end of the first power supply module; and one end of the redundant steering system is connected with one end of the first power supply module.

In some embodiments, the second battery cell is configured as a lithium battery.

In order to achieve the above object, an embodiment of a second aspect of the present utility model proposes a vehicle including the redundant low-voltage power supply apparatus of the above embodiment.

According to the vehicle provided by the embodiment of the utility model, the isolation module and the second power supply module are added, when the power supply device is normal, the first power supply module is used for supplying power to the vehicle load, when any power supply loop fails, the second power supply module is controlled to be closed, the isolation module is controlled to be opened, the failure loop is opened, the second power supply module is used for supplying power to the standby safety load, and the braking or steering control of the vehicle is realized through the standby safety load, so that the vehicle can automatically stop by the side or stop in an emergency way, and the safety of automatic driving is improved while the power redundancy requirement of the vehicle is met.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a related art low voltage power grid system;

FIG. 2 is a schematic diagram of a redundant low voltage power supply in accordance with one embodiment of the present utility model;

FIG. 3 is a flowchart of the operation of a redundant low voltage power supply according to one embodiment of the present utility model;

FIG. 4 is a schematic diagram of a redundant low voltage power supply in accordance with one embodiment of the present utility model;

FIG. 5 is a flowchart of the operation of a redundant low voltage power supply in accordance with one embodiment of the present utility model;

FIG. 6 is a schematic diagram of a redundant low voltage power supply in accordance with one embodiment of the present utility model;

FIG. 7 is a flowchart of the operation of a redundant low voltage power supply in accordance with one embodiment of the present utility model;

fig. 8 is a block diagram of a vehicle according to one embodiment of the utility model.

Reference numerals: a redundant low voltage power supply 10; a DCDC conversion module 1; an isolation module 2; a first switching tube 21; a first control unit 22; a first power supply module 3; a first battery cell 31; a first battery monitoring unit 32; a second switching tube 321, a second control unit 322; a second power supply module 4; a second battery cell 41; a second battery monitoring unit 42; a third switching tube 421; a third control unit 422; a safety control load 5; an autopilot controller 51; an autopilot sensor 52; a braking system 53; a steering system 54; a standby safety load 6; an assist drive controller 61; an assist drive sensor 62; a redundant braking system 63; a redundant steering system 64; a vehicle 20.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a low-voltage power grid system in the related art. The 12V low-voltage power grid is used as a basic power supply guarantee of a whole vehicle functional component, when failure conditions such as short circuit or open circuit occur in a 12V low-voltage power grid system, a driver is reminded to take over the vehicle in time, and meanwhile, the redundant system controls the vehicle to automatically park on a vehicle lane or close to the side.

According to the redundant low-voltage power supply device, the isolation module is arranged to diagnose the main power supply loop, and when the main loop fails, the isolation module is controlled to be disconnected so as to rapidly cut off the failed loop, so that the damage caused by the failure of the power supply system in the power supply system is eliminated, and the driving safety is improved.

The redundant low voltage power supply 10 according to the embodiment of the present utility model is illustrated in the following with reference to fig. 2 to 7.

As shown in fig. 2, the redundant low-voltage power supply apparatus 10 of the embodiment of the present utility model includes: a DCDC conversion module 1, a first power supply module 3, an isolation module 2 and a second power supply module 4, wherein,

the DCDC conversion module 1 is used for converting the power supply voltage into the power supply voltage which can be normally started by the vehicle; one end of the first power supply module 3 is connected with the DCDC conversion module 1, the other end of the first power supply module 3 is connected with the vehicle electric load and the safety control load 5 to form a first power supply loop for supplying power to the vehicle electric load and the safety control load 5, and the other end of the first power supply module 3 is connected with the standby safety load 6 to form a second power supply loop for supplying power to the standby safety load 6; one end of the isolation module 2 is connected with the DCDC conversion module 1 and the first power supply module 3, and is used for switching on or switching off the first power supply module 3 to supply power for the standby safety load 6; one end of the second power supply module 4 is connected with the other end of the isolation module 2, the other end of the second power supply module 4 is connected with the standby safety load 6, and the second power supply module 4 is conducted when the first power supply loop fails so as to supply power for the standby safety load 6.

In the embodiment, the DCDC conversion module 1 is a high-low voltage conversion device of a vehicle, and after the vehicle is started, converts a power supply voltage into a power supply voltage that the vehicle can normally start, so as to supply power to electric equipment of the vehicle, and simultaneously charges the first power supply module 3.

One end of the first power supply module 3 is connected with the DCDC conversion module 1, the other end of the first power supply module 3 is connected with the vehicle electric load and the safety control load 5 to form a first power supply loop, and before the vehicle is started, the power is supplied to the vehicle electric load and the safety control load 5 so as to ensure that the high-voltage system can be reliably electrified under various conditions; and the other end of the first power supply module 3 is connected with the standby safety load 6 to form a second power supply loop for supplying power to the standby safety load 6, so that part or all of electric energy required by other important systems can be ensured in a certain time. The vehicle electric load is an electric load connected with the normal operation of the vehicle, and comprises a power system, a lighting system, a comfortable entertainment system and other vehicle electric devices, and it can be understood that when the normal operation of the first power supply module 3 does not fail, the first power supply module 3 supplies power to the vehicle electric load and the safety control load 5 through the first power supply loop, and simultaneously supplies power to the standby safety load 6 through the second power supply loop.

One end of the isolation module 2 is connected with the DCDC conversion module 1 and the first power supply module 3, the first power supply module 3 is controlled to be turned on or turned off to supply power to the standby safety load 6, under normal conditions, the power consumption of the standby safety load 6 is provided by the first power supply module 3, however, when a power supply device fails, the second power supply module 4 is controlled to be closed, the isolation module 2 is controlled to be opened, a fault loop is cut off, the second power supply loop is conducted, after the second power supply loop is conducted, the second power supply module 4 is used for supplying power to the standby safety load 6, the problem that the safety control load 5 in the power supply device cannot work normally, and the vehicle is out of control is avoided, and when the power supply device fails, the second power supply module 4 is used for supplying power to the standby safety load 6, so that the power redundancy requirements of functions such as steering and braking of an automatic driving vehicle are met.

Specifically, the first power supply module 3 supplies power to a vehicle load, when any power supply loop fails, the second power supply module 4 is closed to participate in work, the isolation module 2 rapidly responds to and breaks the failure loop, one path of normal power supply in the loop is ensured, and automatic side parking or emergency parking of the vehicle is realized.

The isolation module 2 has logic diagnosis and operation capability, the internal main loop is in a normally closed state, and when faults such as overvoltage, undervoltage and short circuit occur in the low-voltage power grid system are detected, the internal main loop is disconnected, so that the first power supply loop is disconnected, and the relative independence and no mutual influence of the low-voltage power grid systems at two ends of the isolation module 2 are ensured.

According to the redundant low-voltage power supply device 10 provided by the embodiment of the utility model, the isolation module 2 and the second power supply module 4 are added, the first power supply module 3 supplies power to the whole vehicle load, when any power supply loop fails, the second power supply module 4 is controlled to be closed, the isolation module 2 is opened to disconnect the failure loop, the second power supply module 4 is used for supplying power to the standby safety load 6, and the braking or steering control of the vehicle is realized through the standby safety load 6, so that the vehicle can automatically stop by side or stop in an emergency way, and the safety of automatic driving is improved while the power supply redundancy requirement of the vehicle is met.

In some embodiments, the isolation module 2 comprises a first switching tube 21 and a first control unit 22, wherein,

one end of the first switching tube 21 is connected with one end of the first power supply module 3, and the other end of the first switching tube 21 is connected with one end of the second power supply module 4, and is used for switching on or switching off the power supply of the first power supply module 3 for the standby safety load 6; one end of the first control unit 22 is connected with one end of the first switching tube 21, and the other end of the first control unit 22 is connected with the other end of the first switching tube 21, and is used for receiving a fault signal of the first power supply loop.

In an embodiment, as shown in fig. 2, the first switch tube 21 and the first control unit 22 are disposed in the isolation module 2, the first control unit 22 receives a fault signal of the first power supply loop, the first switch tube 21 turns on or off the first power supply module 3 to supply power to the standby safety load 6, for example, when the first power supply loop fails in overvoltage, undervoltage, short circuit, etc., the first control unit 22 in the isolation module 2 receives the fault signal of the first power supply loop, then controls the first switch tube 21 in the isolation module 2 to be opened, turns off the first power supply module 3 to supply power to the standby safety load 6, and the second power supply module 4 supplies power to the standby safety load 6. Through setting up isolation module 2, carry out the diagnosis to first power supply loop and second power supply loop, when any main power supply loop breaks down, isolation module 2 fast response cuts off the fault loop to use second power supply module 4 to supply power for reserve safety load 6, thereby guarantee that there is still normal power supply all the way in the vehicle electric power network, guarantee the stability of vehicle electric power network, avoided leading to the condition that the vehicle is out of control because of the unable normal work of autonomous driving control part of the vehicle of power failure in the low-voltage grid system.

In some embodiments, the first power supply module 3 comprises: a first battery unit 31 and a first battery monitoring unit 32, wherein,

one end of the first battery unit 31 is connected with one end of the isolation module 2, and the other end of the first battery unit 31 is grounded and used for supplying power to the first power supply loop and the second power supply loop when the isolation module 2 is conducted; one end of the first battery monitoring unit 32 is connected with one end of the isolation module 2, and the other end of the first battery monitoring unit 32 is connected with one end of the first battery unit 31 for monitoring a state parameter of the first battery unit 31.

In the embodiment, as shown in fig. 2, a first battery unit 31 and a first battery monitoring unit 32 are disposed in a first power supply module 3, where the first battery unit 31 supplies power to a first power supply loop and a second power supply loop when a vehicle is started, so as to ensure that a high-voltage system can be reliably powered on under various conditions; the first battery monitoring unit 32 monitors a state parameter of the first battery unit 31, for example, monitors parameters such as a current, a voltage, a temperature, a remaining capacity, etc. of the first battery unit 31, and monitors whether a loop connected to the first battery unit 31 is turned on, and transmits monitored data to the second control unit 322 in real time, so that when the first battery unit 31 fails, the power is timely turned off.

In some embodiments, the second power supply module 4 comprises: a second battery unit 41, and a second battery monitoring unit 42, wherein,

one end of the second battery unit 41 is connected with the other end of the isolation module 2, and the other end of the second battery unit 41 is grounded and used for supplying power to the second power supply loop when the isolation module 2 is disconnected; one end of the second battery monitoring unit 42 is connected with the other end of the isolation module 2, and the other end of the second battery monitoring unit 42 is connected with one end of the second battery unit 41 for monitoring a state parameter of the second battery unit 41.

In an embodiment, as shown in fig. 2, the second battery unit 41 and the second battery monitoring unit 42 are provided in the second power supply module 4, wherein the second battery unit 41 supplies power to the second power supply circuit when the isolation module 2 is in the off state; the second battery monitoring unit 42 monitors a state parameter of the second battery unit 41, for example, monitors parameters such as a current, a voltage, a temperature, a remaining capacity, etc. of the second battery unit 41, and monitors whether a loop connected to the second battery unit 41 is turned on, and transmits monitored data to the third control unit 422 in real time, so that when the first battery unit 31 fails, the second battery unit 41 can normally supply power, and a failure condition of the vehicle due to a power failure is avoided.

In some embodiments, the first battery monitoring unit 32 includes: a second switching tube 321, and a second control unit 322, wherein,

one end of the second switching tube 321 is connected with one end of the isolation module 2, and the other end of the second switching tube 321 is connected with one end of the first battery unit 31 and used for switching on or switching off the first battery unit 31; one end of the second control unit 322 is connected with one end of the second switching tube 321, and the other end of the second control unit 322 is connected with the other end of the second switching tube 321, and is used for switching on or off the second switching tube 321.

In an embodiment, as shown in fig. 2, the second switching tube 321 and the second control unit 322 are disposed in the first battery monitoring unit 32, where the second control unit 322 detects the voltage value and the health status of the second power supply module 4, and whether the first power supply loop is turned on, so as to control the on or off of the second switching tube 321; the on or off of the second switch 321 controls the power supply of the first battery unit 31, so as to realize the voltage and current monitoring and loop control of the first battery monitoring unit 32 on the first power supply loop.

In some embodiments, the second battery monitoring unit 42 includes: a third switching tube 421, and a third control unit 422, wherein,

one end of the third switch tube 421 is connected with the other end of the isolation module 2, and the other end of the third switch tube 421 is connected with one end of the second battery unit 41, and is used for switching on or switching off the second battery unit 41; one end of the third control unit 422 is connected to one end of the third switching tube 421, and the other end of the third control unit 422 is connected to the other end of the third switching tube 421, for turning on or off the third switching tube 421.

In an embodiment, as shown in fig. 2, a third switch tube 421 and a third control unit 422 are disposed in the second battery monitoring unit 42, where the third control unit 422 detects a voltage value and a health status of the second power supply module 4, and whether the first power supply loop is turned on, and monitors whether an automatic driving mode of the vehicle is turned on, so as to control the third switch tube 421 to be turned on or turned off; the third switch 421 is turned on or off to control the power supply of the second battery unit 41, when the vehicle is in an automatic driving mode and a fault is detected in the low-voltage power supply system, the third switch 421 is closed in advance, so that the second power supply loop supplies power to the vehicle, and the voltage and current monitoring and loop control of the second battery monitoring unit 42 on the second power supply loop are realized.

In some embodiments, the safety control load 5 comprises at least one of the following: an autopilot controller 51, autopilot sensor 52, a brake system 53 and a steering system 54, wherein,

one end of the autopilot controller 51 is connected to one end of the first power supply module 3; one end of the autopilot sensor 52 is connected to one end of the first power supply module 3; one end of the braking system 53 is connected with one end of the first power supply module 3; one end of the steering system 54 is connected to one end of the first power supply module 3.

In the embodiment, the autopilot controller 51 is used as a main controller for autopilot, one end of the autopilot controller is connected with one end of the first power supply module 3, and interacts with other controller modules of the whole vehicle through collecting sensor signals to perform autopilot logic judgment, so as to realize autopilot control of the vehicle, for example, when a fault affecting the realization of the autopilot function is detected, a customer is prompted to take over the vehicle, and if the driver does not take over, the autopilot vehicle is automatically controlled to realize side parking or emergency braking of the lane.

The autopilot sensor 52 is used as a main sensor for autopilot, one end of which is connected to one end of the first power supply module 3, and includes an autopilot sensor and a camera, and provides accurate vehicle and road condition information to the autopilot controller 51 in an autopilot function scenario.

The brake system 53 is used as a main brake system for automatic driving, one end of the brake system is connected with one end of the first power supply module 3, and comprises a brake system sensor, a brake system controller and a brake system actuator, and receives a brake operation instruction sent by the automatic driving controller 51 or the auxiliary driving controller 61 under the automatic driving function scene to realize the automatic braking and parking functions of the vehicle.

The steering system 54 is used as a main steering control system for automatic driving, one end of the steering system 54 is connected with one end of the first power supply module 3, and comprises a steering system sensor, a steering system controller and a steering system actuator, and receives a steering work instruction sent from the automatic driving controller 51 or the auxiliary driving controller 61 under the automatic driving function scene to realize the automatic steering function of the vehicle.

In some embodiments, the back-up safety load 6 comprises at least one of the following: a driver assist controller 61, a driver assist sensor 62, a redundant brake system 63, and a redundant steering system 64, wherein,

one end of the auxiliary driving controller 61 is connected to one end of the first power supply module 3; one end of the driving assistance sensor 62 is connected to one end of the first power supply module 3; one end of the redundant brake system 63 is connected to one end of the first power supply module 3; one end of the redundant steering system 64 is connected to one end of the first power supply module 3.

In the embodiment, the auxiliary driving controller 61 is used as an auxiliary controller for automatic driving, one end of the auxiliary driving controller is connected with one end of the first power supply module 3, and interacts with other controller modules of the whole vehicle through collecting sensor signals, for example, when the automatic driving controller 51 is abnormal, the auxiliary driving controller 61 of the vehicle automatically controls the vehicle to realize side parking or emergency braking of the lane.

The auxiliary driving sensor 62 is used as an auxiliary sensor for automatic driving, one end of the auxiliary driving sensor is connected with one end of the first power supply module 3, and the auxiliary driving sensor comprises an auxiliary sensor and a camera, so that accurate vehicle and road condition information is provided for the auxiliary driving controller 61 under the automatic driving function scene.

The redundant brake system 63 is used as an auxiliary brake system for automatic driving, one end of the redundant brake system 63 is connected with one end of the first power supply module 3, and comprises a brake system sensor, an auxiliary brake system controller and an auxiliary brake system actuator, and in an automatic driving function scene, when the brake system and a loop fail, the redundant brake system 63 receives a brake working instruction sent by the automatic driving controller 51 or the auxiliary driving controller 61, so that the automatic braking and parking functions of the vehicle are realized.

The redundant steering system 64 is used as an automatic steering auxiliary steering control system, one end of the redundant steering system is connected with one end of the first power supply module 3, and comprises a backup steering system sensor, a backup steering system controller and a backup steering system actuator, and receives a steering work instruction sent by the automatic steering controller 51 or the auxiliary steering controller 61 in an automatic steering function scene, and is connected to the DCDC conversion module 1 through a steering motor with a double winding to participate in work, and when any steering system fails, the other steering system controller controls the steering system actuator to degrade work, so that the automatic steering function of the vehicle is realized.

In some embodiments, the second battery cell 41 is configured as a lithium battery.

In an embodiment, as shown in fig. 2, the second battery unit 41 is configured as a lithium battery, and exists together with the existing architecture as a cold backup, so as to reduce the conflict with the existing architecture, and by providing the second battery unit 41 as a lithium battery, the power supply is provided for the vehicle standby safety load 6, such as the auxiliary driving controller 61, the auxiliary driving sensor 62, the redundant braking system 63, the redundant steering system 64 and the like, so as to meet the power redundancy requirements of the functions of controlling, braking, steering and the like of the autonomous vehicle.

It will be appreciated that the second battery unit 41 is configured as a lithium battery, and the first battery unit 31 may be configured as a lead-acid storage battery, or as a lithium battery.

The following is an illustration of the operation of the vehicle in different modes.

Referring to fig. 2 and 3, when the vehicle is in a normal state, for example, the power mode of the vehicle is OFF, or the power mode is ON, or the vehicle is not in a high voltage state, the second switch 321 of the first power supply module 3 is closed to conduct the power supply of the first battery unit 31, and the first power supply module 3 is conducted to supply power to the vehicle electric load and the safety control load 5, and the first switch 21 of the isolation module 2 is closed to conduct the second power supply loop; the third switch tube 421 of the second power supply module 4 is disconnected to turn off the power supply of the second battery unit 41, the second power supply module 4 is turned off to supply power to the standby safety load 6, the first power supply module 3 supplies power to the vehicle power load and the safety control load 5 through the first power supply loop, and meanwhile, the second power supply loop supplies power to the standby safety load 6 to ensure normal operation of the vehicle.

As shown in fig. 4 and fig. 5, when the vehicle is in a fault state, for example, the power mode of the vehicle is ON, and the vehicle is in an automatic driving mode, and when the first power supply circuit has faults such as overvoltage, undervoltage and the like, the third switch tube 421 of the second power supply module 4 is controlled to be closed, the power supply of the second battery unit 41 is conducted, and the second power supply module 4 is conducted to supply power to the standby safety load 6; the first switch tube 21 of the isolation module 2 is controlled to be disconnected to cut off a fault circuit, the first power supply module 3 is turned off to supply power to the standby safety load 6, the second power supply module 4 supplies power to the standby safety load 6 through a second power supply loop, and the standby safety load 6 controls the vehicle to automatically park the vehicle on the lane or close to the side, so that the risk of losing control is avoided.

As shown in fig. 6 and 7, when the vehicle is in an open state, for example, when the first power supply circuit of the vehicle is open, the second switching tube 321 of the first power supply module 3 is opened, the power supply of the first battery unit 31 is turned off, and the first power supply module 3 is turned off to supply power to the vehicle electric load and the safety control load 5; the first switch tube 21 of the isolation module 2 is closed, so that the second power supply loop is conducted; the third switch tube 421 of the second power supply module 4 is closed to conduct the power supply of the second battery unit 41, conduct the power supply of the second power supply module 4 to supply power to the standby safety load 6, the second power supply module 4 supplies power to the vehicle power load and the safety control load 5 through the first power supply loop, and meanwhile, the second power supply loop supplies power to the standby safety load 6, so that one path of normal power supply in the loop is ensured, and automatic side parking of the vehicle or emergency parking of the vehicle is realized.

According to the redundant low-voltage power supply device 10 provided by the embodiment of the utility model, the isolation module 2 and the second power supply module 4 are added, the first power supply module 3 supplies power to the whole vehicle load, when any power supply loop fails, the second power supply module 4 is controlled to be closed, the isolation module 2 is opened to disconnect the failure loop, the second power supply module 4 is used for supplying power to the standby safety load 6, and the braking or steering control of the vehicle is realized through the standby safety load 6, so that the vehicle can automatically stop by side or stop in an emergency way, and the safety of automatic driving is improved while the power supply redundancy requirement of the vehicle is met.

A vehicle 20 according to an embodiment of the present utility model is described below with reference to fig. 8.

As shown in fig. 8, the vehicle 20 of the embodiment of the utility model employs the redundant low-voltage power supply apparatus 10 of the above-described embodiment.

According to the vehicle 20 of the embodiment of the utility model, according to the redundant low-voltage power supply device 10 of the embodiment of the utility model, the isolation module 2 and the second power supply module 4 are added, the first power supply module 3 supplies power to the whole vehicle load, when any power supply loop fails, the second power supply module 4 is controlled to be closed, the isolation module 2 is opened to disconnect the failure loop, the second power supply module 4 is used for supplying power to the standby safety load 6, and the braking or steering control of the vehicle is realized through the standby safety load 6, so that the vehicle can automatically stop by side or stop in emergency in the lane, and the safety of automatic driving is improved while the power redundancy requirement of the vehicle is met.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A redundant low voltage power supply comprising:

the DCDC conversion module is used for converting the power supply voltage into a power supply voltage which can be normally started by the vehicle;

the system comprises a DCDC conversion module, a first power supply module, a second power supply module and a second power supply module, wherein one end of the first power supply module is connected with the DCDC conversion module, the other end of the first power supply module is connected with a vehicle electric load and a safety control load and is used for forming a first power supply loop so as to supply power for the vehicle electric load and the safety control load, and the other end of the first power supply module is connected with a standby safety load and is used for forming a second power supply loop so as to supply power for the standby safety load;

the isolation module is connected with the DCDC conversion module and the first power supply module at one end and used for switching on or switching off the power supply of the first power supply module for the standby safety load;

the second power supply module, the one end of second power supply module with the other end of isolation module is connected, the other end of second power supply module with reserve safety load is connected, the second power supply module switches on when first power supply return circuit trouble, in order to supply power for reserve safety load.

2. The redundant low voltage power supply of claim 1, wherein the isolation module comprises:

one end of the first switching tube is connected with one end of the first power supply module, and the other end of the first switching tube is connected with one end of the second power supply module and is used for switching on or switching off the first power supply module to supply power for the standby safety load;

and one end of the first control unit is connected with one end of the first switching tube, and the other end of the first control unit is connected with the other end of the first switching tube and is used for receiving a fault signal of the first power supply loop.

3. The redundant low voltage power supply of claim 1, wherein the first power supply module comprises:

one end of the first battery unit is connected with one end of the isolation module, and the other end of the first battery unit is grounded and is used for supplying power to the first power supply loop and the second power supply loop when the isolation module is conducted;

and one end of the first battery monitoring unit is connected with one end of the isolation module, and the other end of the first battery monitoring unit is connected with one end of the first battery unit and is used for monitoring state parameters of the first battery unit.

4. The redundant low voltage power supply of claim 1, wherein the second power supply module comprises:

one end of the second battery unit is connected with the other end of the isolation module, and the other end of the second battery unit is grounded and is used for supplying power to the second power supply loop when the isolation module is disconnected;

and one end of the second battery monitoring unit is connected with the other end of the isolation module, and the other end of the second battery monitoring unit is connected with one end of the second battery unit and is used for monitoring the state parameters of the second battery unit.

5. A redundant low voltage power supply according to claim 3 wherein the first battery monitoring unit comprises:

one end of the second switching tube is connected with one end of the isolation module, and the other end of the second switching tube is connected with one end of the first battery unit and used for switching on or switching off the first battery unit;

and one end of the second control unit is connected with one end of the second switching tube, and the other end of the second control unit is connected with the other end of the second switching tube and is used for switching on or switching off the second switching tube.

6. The redundant low voltage power supply of claim 4, wherein the second battery monitoring unit comprises:

one end of the third switching tube is connected with the other end of the isolation module, and the other end of the third switching tube is connected with one end of the second battery unit and used for switching on or switching off the second battery unit;

and one end of the third control unit is connected with one end of the third switching tube, and the other end of the third control unit is connected with the other end of the third switching tube and used for switching on or switching off the third switching tube.

7. The redundant low voltage power supply of claim 1, wherein the safety control load comprises at least one of:

the automatic driving controller is connected with one end of the first power supply module;

the automatic driving sensor is connected with one end of the first power supply module;

the brake system is connected with one end of the first power supply module;

and one end of the steering system is connected with one end of the first power supply module.

8. The redundant low voltage power supply of claim 1, wherein the backup safety load comprises at least one of:

the auxiliary driving controller is connected with one end of the first power supply module;

the auxiliary driving sensor is connected with one end of the first power supply module;

the redundant braking system is connected with one end of the first power supply module;

and one end of the redundant steering system is connected with one end of the first power supply module.

9. The redundant low voltage power supply of claim 4, wherein the second battery cell is configured as a lithium battery.

10. A vehicle, characterized by comprising: a redundant low voltage power supply according to any one of claims 1-9.