CN116278763B - A redundant power supply system and control method thereof - Google Patents
A redundant power supply system and control method thereof Download PDFInfo
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- CN116278763B CN116278763B CN202310399577.3A CN202310399577A CN116278763B CN 116278763 B CN116278763 B CN 116278763B CN 202310399577 A CN202310399577 A CN 202310399577A CN 116278763 B CN116278763 B CN 116278763B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
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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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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明提供了一种冗余供电系统及其控制方法，其中该系统包括动力电池、DCDC转换器、主蓄电池、电源隔离模块和备用蓄电池，电源隔离模块中设有总线路、并联设置的第一线路和第二线路，第一线路的一端与主供电回路相连，其另一端与总线路相连；第二线路的一端与备用蓄电池相连，其另一端与总线路相连；第一线路上串联设置有MOSFET Q1、MOSFET Q2，第二线路上串联设置有MOSFET Q3、MOSFET Q4；电源隔离模块中还具有第一监控电路、第二监控电路、第一驱动电路和第二驱动电路；备用蓄电池上设有与电源隔离模块通讯连接的电池电量传感器。本发明能够保证整车的正常用电，保证备用蓄电池的可靠性和寿命。
The present invention provides a redundant power supply system and a control method thereof, wherein the system includes a power battery, a DCDC converter, a main battery, a power isolation module and a backup battery, wherein a main circuit, a first circuit and a second circuit arranged in parallel are provided in the power isolation module, one end of the first circuit is connected to the main power supply circuit, and the other end thereof is connected to the main circuit; one end of the second circuit is connected to the backup battery, and the other end thereof is connected to the main circuit; MOSFET Q1 and MOSFET Q2 are arranged in series on the first circuit, and MOSFET Q3 and MOSFET Q4 are arranged in series on the second circuit; the power isolation module also includes a first monitoring circuit, a second monitoring circuit, a first driving circuit and a second driving circuit; and a battery power sensor connected to the power isolation module for communication is provided on the backup battery. The present invention can ensure the normal power consumption of the whole vehicle and the reliability and life of the backup battery.
Description
Technical Field
The invention belongs to the technical field of vehicle power supply systems, and particularly relates to a redundant power supply system and a control method thereof.
Background
Along with the research of the automatic driving technology, the automatic driving and related modules are required to have higher functional safety levels, such as the requirement of braking and steering functions to have backup redundancy, and the network communication has backup redundancy, so that the automatic driving of the level L3 and above needs to have redundant power supply nodes, when the main power supply system fails, the power supply system needs to be immediately switched to the standby power supply system, so that the single point failure in the traditional vehicle power supply system is avoided, multiple functional failures of the whole vehicle are brought, and the safety and the reliability of the standby power supply system are very important.
The main power supply loop in the existing redundant power supply system is a power supply source composed of a DCDC converter and a low-voltage 12V storage battery, and the standby power supply adopts a standby 12V storage battery. When the main power supply loop fails, the main power supply loop needs to be switched to a standby power supply, the reliability and the safety of the standby power supply are very important, and the safety and the reliability of a standby 12V storage battery are not protected by the prior art. Therefore, how to design a redundant power supply system and a control method thereof to realize the backup of the vehicle power supply system and improve the safety and reliability of the standby power supply at the same time is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a redundant power supply system and a control method thereof, which are used for solving the technical problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The redundant power supply system comprises a power battery, a DCDC converter, a main storage battery, a power isolation module, a standby storage battery and a battery electric quantity sensor, wherein the power battery is electrically connected with the DCDC converter, the DCDC converter and the main storage battery are arranged on a main power supply loop in parallel, a main circuit connected with a redundant power supply load, a first circuit and a second circuit which are arranged in parallel are arranged in the power isolation module, one end of the first circuit is connected with the main power supply loop, the other end of the first circuit is connected with the main circuit, the standby storage battery is connected with one end of the second circuit through the standby power supply loop, the other end of the second circuit is connected with the main circuit, a MOSFET Q1 and a MOSFET Q2 are arranged on the first circuit in series, a MOSFET Q3 and a MOSFET Q4 are arranged on the second circuit in series, a first monitoring circuit used for detecting the main power supply loop, a second monitoring circuit used for detecting the standby storage battery and the standby power supply loop, a first MOSFET 3 used for controlling on-off of the MOSFET 1 and the MOSFET 2 are also arranged in the power isolation module, a first MOSFET 3 used for controlling on-off of the standby storage battery and the MOSFET and a second MOSFET 4 is used for controlling on-off of the power supply loop, and a power supply module is connected with the power sensor.
Preferably, the power distribution box further comprises a power distribution box, wherein a plurality of fuses are arranged in parallel in the power distribution box, each redundant power supply load is connected with a main line in the power distribution box through each fuse, and the main line is connected with the main line.
The redundant power supply control method based on the redundant power supply system comprises the following steps:
Under normal conditions, the MOSFET Q1, the MOSFET Q2, the MOSFET Q3 and the MOSFET Q4 in the power isolation module are all conducted, and the whole vehicle is powered by the power battery through the DCDC converter;
When the first monitoring circuit in the power isolation module detects that the main power supply loop is in a failure state, the MOSFET Q1 and the MOSFET Q2 are turned off through the first driving circuit, and the MOSFET Q3 and the MOSFET Q4 are controlled to be both on through the second driving circuit, and the whole vehicle is only powered by the standby storage battery;
When the second monitoring circuit in the power isolation module detects that the standby storage battery or the standby power supply loop is in a failure state, the MOSFET Q3 and the MOSFET Q4 are turned off through the second driving circuit, the MOSFET Q1 and the MOSFET Q2 are controlled to be both on through the first driving circuit, the whole vehicle is only powered by the main power supply loop at the moment, and when the second monitoring circuit detects that the standby power supply loop is restored to a normal state from the failure state, the MOSFET Q3 and the MOSFET Q4 are controlled to be both on through the second driving circuit, so that the power supply of the standby storage battery to the redundant power supply load is restored.
Preferably, when the main power supply loop and the standby power supply loop are normal, when the standby storage battery discharges through an external load, the battery power sensor monitors the power of the standby storage battery in real time and sends power information of the standby storage battery to the power isolation module, when the power isolation module receives that the SOC of the standby storage battery sent by the battery power sensor is smaller than a first set threshold value, the MOSFET Q4 is disconnected through the second driving circuit, the standby storage battery stops discharging, and when the SOC of the storage battery is larger than a second threshold value after the storage battery is charged, the MOSFET Q4 is controlled to be recovered to be on through the second driving circuit, and the standby storage battery is allowed to discharge outwards and be charged.
Preferably, the first set threshold is 69% to 71%, and the second set threshold is 84% to 86%.
Preferably, when the main power supply loop and the standby power supply loop are normal, the DCDC converter continuously charges the standby storage battery, when the SOC of the standby storage battery is larger than a third set threshold value, the MOSFET Q3 is disconnected through the second driving circuit to stop charging the standby storage battery, and when the SOC of the standby storage battery is smaller than the second set threshold value after the standby storage battery is discharged outwards, the MOSFET Q3 is turned on through the second driving circuit to allow the standby storage battery to be discharged outwards and charged.
Preferably, the third set threshold is 94% to 96%.
Preferably, after the vehicle is powered down, the second driving circuit directly turns off the MOSFETs Q3 and Q4, and the whole vehicle is only powered by the main battery.
The invention has the beneficial effects that:
The redundant power supply system and the control method thereof can well realize the switching of the main power supply loop and the standby power supply loop, so that the main power supply loop and the standby power supply loop are mutually backed up, the power utilization of the whole vehicle can be effectively ensured when the main power supply loop or the standby power supply loop fails, namely is in a failure state, meanwhile, the charging and discharging of the standby storage battery can be controlled, the occurrence of overcharge and overdischarge of the standby storage battery is avoided, and the safety, the reliability and the service life of the standby storage battery are ensured.
Drawings
For a clearer description of embodiments of the present application or of the prior art, reference will be made briefly to the accompanying drawings, which are required to be used in the embodiments, and to further detail of specific embodiments of the present application, taken in conjunction with the accompanying drawings, wherein
Fig. 1 is a schematic diagram of a redundant power supply system according to an embodiment of the present invention.
The reference numerals in the drawings:
11. A standby power supply loop 12 and a main power supply loop;
21. Total wiring, 22, first wiring, 23, second wiring, 24, first driving circuit,
25. A second driving circuit;
31. main line, 32, fuse.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present solution will be described in further detail with reference to specific embodiments.
As shown in FIG. 1, the embodiment of the invention provides a redundant power supply system, which comprises a power battery, a DCDC (direct current/direct current) converter, a main storage battery, a power isolation module, a standby storage battery and a battery electric quantity sensor, wherein the power battery is electrically connected with the DCDC converter, the DCDC converter and the main storage battery are arranged on a main power supply loop in parallel, a main circuit 21 connected with a redundant power supply load, a first circuit 22 and a second circuit 23 which are arranged in parallel are arranged in the power isolation module, one end of the first circuit 22 is connected with the main power supply loop 12, the other end of the first circuit 22 is connected with one end of the main circuit 21, the standby storage battery is connected with one end of the second circuit 23 through the standby power supply loop 11, the other end of the second circuit 23 is connected with the main circuit 21, MOSFETs Q1 and Q2 are arranged on the first circuit 23 in series, a first monitoring circuit used for detecting the main power supply loop, a second monitoring circuit used for detecting the standby storage battery and a second power supply loop and a second SFETQ2 used for controlling the on-off of the power supply loop, and a first sensor and a second sensor used for controlling the on-off of the power supply loop 1 and the SFETQ2 are arranged on the first circuit and the second sensor.
The redundant power supply system provided by the embodiment of the invention can well realize the switching of the main power supply loop and the standby power supply loop, so that the main power supply loop and the standby power supply loop are mutually backed up, the power consumption of the whole vehicle can be effectively ensured when the main power supply loop or the standby power supply loop fails, meanwhile, the charge and discharge of the standby storage battery can be controlled, the overcharge and the overdischarge of the standby storage battery are avoided, and the safety, the reliability and the service life of the standby storage battery are ensured.
Further, the redundant power supply system further comprises a distribution box, wherein a plurality of fuses 32 are arranged in parallel in the distribution box, each redundant power supply load is connected with a main circuit 31 in the distribution box through each fuse, and the main circuit 31 is connected with the main circuit 21. With this arrangement, each redundant power supply load is short-circuited by each fuse. Preferably, the battery power sensor (IBS for short) is in communication connection with the power isolation module through a LIN bus. It will be appreciated that in the embodiment of the present invention, the power battery, the DCDC converter and the main battery are used as the main power source, and the backup battery is used as the backup power source. The power isolation module controls the charge and discharge of the standby storage battery according to the electric quantity information of the standby storage battery sent by the battery electric quantity sensor so as to avoid the phenomenon of overcharge and overdischarge of the standby storage battery, and improve the reliability and service life of the standby storage battery.
The MOSFET is called Metal-Oxide-Semiconductor Field-Effect Transistor, and the Chinese MOSFET is called Metal-Oxide semiconductor field effect transistor, which is a controllable switch commonly used in the prior art.
The embodiment of the invention also provides a redundant power supply control method based on the redundant power supply system, which comprises the following steps:
Under normal conditions, namely the main power supply loop and the standby power supply loop have no faults, namely when the main power supply loop and the standby power supply loop are in a normal state, the MOSFET Q1, the MOSFET Q2, the MOSFET Q3 and the MOSFET Q4 in the power isolation module are all conducted, and the whole vehicle is powered by the power battery through the DCDC converter;
When the first monitoring circuit in the power isolation module detects that the main power supply loop 12 is in a failure state, the MOSFET Q1 and the MOSFET Q2 are turned off through the first driving circuit 24, when the second monitoring circuit detects that the standby storage battery and the standby power supply loop are in a normal state, the MOSFET Q3 and the MOSFET Q4 are both turned on through the second driving circuit 25, and the whole vehicle is only powered by the standby storage battery;
When the second monitoring circuit in the power isolation module detects that the standby storage battery or the standby power supply loop 11 breaks down, namely is in a failure state, the MOSFET Q3 and the MOSFET Q4 are turned off through the second driving circuit 25, when the first monitoring circuit detects that the main power supply loop is in a normal state, the MOSFET Q1 and the MOSFET Q2 are controlled to be both on through the first driving circuit, the whole vehicle is only powered by the main power supply at the moment, when the second monitoring circuit detects that the standby power supply loop is restored to the normal state from the failure state, the MOSFET Q3 and the MOSFET Q4 are controlled to be both on through the second driving circuit 25, so that the power supply of the standby storage battery to the redundant power supply load is restored.
The redundant power supply control method provided by the embodiment of the invention has the technical effects as well.
Further, when the main power supply loop and the standby power supply loop are normal, when the standby storage battery discharges through an external load, the electric quantity of the standby storage battery is gradually reduced, the battery electric quantity sensor monitors the electric quantity of the standby storage battery in real time, when the power isolation module receives that the standby storage battery SOC sent by the battery electric quantity sensor is smaller than a first set threshold value, the MOSFET Q4 is disconnected through the second driving circuit (at the moment, the MOSFET Q3 is still on), the standby storage battery stops discharging so as to avoid the standby storage battery in an overdischarge state, and the service life of the standby storage battery is ensured, after the storage battery is charged (at the moment, the DCDC converter can charge the standby storage battery through the body diodes of the MOSFET Q3 and the MOSFET Q4), and when the standby storage battery SOC is larger than a second threshold value, the second driving circuit controls the MOSFET Q4 to be on, and the standby storage battery is allowed to discharge and be charged outwards.
It can be understood that when the standby battery and the standby power supply loop are in a normal state, the standby battery can supply power to the redundant power supply load and can charge the standby battery at the same time when the MOSFET Q3 and the MOSFET Q4 are both on, when the MOSFET Q4 is on and the MOSFET Q3 is off, the current of the standby battery can also supply power to the redundant power supply load through the body diodes of the MOSFET Q4 and the MOSFET Q3, and when the MOSFET Q4 is off and the MOSFET Q3 is on, the main power supply can charge the standby battery through the body diodes of the MOSFET Q3 and the MOSFET Q4.
Specifically, the first set threshold is 69% to 71%, and may preferably be 70%, and the second set threshold is 84% to 86%, and may preferably be 85%. It can be understood that SOC (State Of Charge), which is a State Of Charge, is used to reflect the remaining capacity Of a battery, and is defined numerically as the ratio Of the remaining capacity to the battery capacity, and is usually expressed as a percentage.
Further, when the main power supply loop and the standby power supply loop are normal, the DCDC converter continuously charges the standby storage battery, when the power isolation module receives that the standby storage battery SOC sent by the IBS is larger than a third set threshold, the MOSFET Q3 is disconnected through the second driving circuit (when the MOSFET Q4 is still on), the standby storage battery is stopped to charge, so that the standby storage battery is prevented from being in an overcharged state, the service life of the standby storage battery is ensured, the reliability of the standby storage battery is improved, at the moment, if the standby storage battery is required to discharge outwards, the conducting state of the MOSFET Q4 is unchanged, the standby storage battery can supply power to a redundant power supply load through the body diodes of the MOSFET Q4 and the MOSFET Q3, if the standby storage battery is not required to discharge outwards, the MOSFET Q4 is controlled to be disconnected through the second driving circuit, and after the standby storage battery discharges outwards, when the standby storage battery SOC is detected to be smaller than the second set threshold, the MOSFET Q3 is turned on through the second driving circuit, and the standby storage battery is allowed to discharge outwards and be charged.
Specifically, the third set threshold is 94% to 96%, and may be preferably 95%.
Further, after the vehicle is powered down, that is, the whole vehicle needs to enter a dormant state, the whole vehicle is powered down under high voltage, that is, the DCDC converter also stops working, the whole vehicle is powered by the low-voltage storage battery only, at this time, in order to prevent electric quantity loss caused by the fact that the electric quantity of the main storage battery is inconsistent with that of the standby storage battery, the two storage batteries are mutually charged, and in order to ensure that the standby storage battery is in the high-electric quantity state, after the vehicle is powered down, the second driving circuit directly turns off the MOSFET Q3 and the MOSFET Q4, so that the whole vehicle is powered by the main storage battery only.
It can be understood that the invention considers the charge and discharge protection of the standby storage battery, because the standby storage battery can only provide power when the main power supply loop fails, and the vehicle can only travel safely and temporarily only by the standby power supply, because the storage battery has very limited electric quantity, the electric quantity and the service life of the standby storage battery are extremely important for ensuring the vehicle to travel safely to the roadside for parking, and does not consider the charge and discharge protection of the main storage battery, because if the standby power supply fails, the whole vehicle can still be powered by the DCDC converter and the main storage battery, and the DCDC converter can ensure the vehicle to travel normally for a long time.
The invention adopts a novel whole-vehicle redundant power supply scheme, when a main power supply loop fails, the standby power supply can immediately and continuously supply power reliably, so that the driving safety of L3 and above automatic driving vehicles is ensured; the invention adopts a power supply scheme with a standby power supply protection function, the main control unit is a power supply isolation module, the charging and discharging of the standby power supply are protected by judging the electric quantity information of the standby storage battery sent by the IBS, the safety and reliability of the standby power supply are ensured, meanwhile, the residual electric quantity of the standby power supply is controlled to be not less than 70%, the deep discharging of the standby storage battery is avoided, and the service life of the standby power supply is greatly prolonged.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that these examples are only for illustrating the present application and are not intended to limit the scope of the present application, and that various changes and modifications may be made by one skilled in the art after reading the contents of the present application, and the equivalent forms are also within the scope of the present application as defined in the appended claims.
Claims (2)
1. A redundant power supply control method of a redundant power supply system, comprising:
Under normal conditions, the MOSFET Q1, the MOSFET Q2, the MOSFET Q3 and the MOSFET Q4 in the power isolation module are all conducted, and the whole vehicle is powered by the power battery through the DCDC converter;
When the first monitoring circuit in the power isolation module detects that the main power supply loop is in a failure state, the MOSFET Q1 and the MOSFET Q2 are turned off through the first driving circuit, and the MOSFET Q3 and the MOSFET Q4 are controlled to be both on through the second driving circuit, and the whole vehicle is only powered by the standby storage battery;
When the second monitoring circuit in the power isolation module detects that the standby storage battery or the standby power supply loop is in a failure state, the MOSFET Q3 and the MOSFET Q4 are turned off through the second driving circuit, the MOSFET Q1 and the MOSFET Q2 are controlled to be both on through the first driving circuit, and the whole vehicle is only powered by the main power supply loop at the moment;
When the standby storage battery is discharged through an external load, the battery electric quantity sensor monitors the electric quantity of the standby storage battery in real time and sends electric quantity information of the standby storage battery to the power isolation module, when the power isolation module receives that the SOC of the standby storage battery sent by the battery electric quantity sensor is smaller than a first set threshold value, the MOSFET Q4 is disconnected through the second driving circuit, and the standby storage battery stops discharging;
The first set threshold value is 69-71%, and the second threshold value is 84-86%;
When the standby storage battery is discharged outwards, when the SOC of the standby storage battery is smaller than the second set threshold value, the MOSFET Q3 is conducted through the second driving circuit, and the standby storage battery is allowed to be discharged outwards and charged;
the third set threshold is 94% to 96%.
2. The redundant power supply control method according to claim 1, wherein the second drive circuit directly turns off the MOSFETs Q3, Q4 after the power down of the vehicle, and the entire vehicle is supplied with power only from the main battery.
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| CN202310399577.3A CN116278763B (en) | 2023-04-14 | 2023-04-14 | A redundant power supply system and control method thereof |
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| CN112193183B (en) * | 2020-09-28 | 2022-04-01 | 长城汽车股份有限公司 | Isolation component, autonomous vehicle redundancy architecture and isolation component control method |
| WO2022241800A1 (en) * | 2021-05-21 | 2022-11-24 | 华为技术有限公司 | Power distribution device, vehicle, and fault processing method |
| CN114614542A (en) * | 2022-03-28 | 2022-06-10 | 智己汽车科技有限公司 | Intelligent power distribution module and power supply system |
| CN115085356A (en) * | 2022-06-22 | 2022-09-20 | 智己汽车科技有限公司 | New energy vehicle and low-voltage redundant power supply system and power supply method thereof |
| CN115042627A (en) * | 2022-07-22 | 2022-09-13 | 北京经纬恒润科技股份有限公司 | Low-voltage dual-power system of electric vehicle and control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085360A (en) * | 2022-06-29 | 2022-09-20 | 中国第一汽车股份有限公司 | A controller power supply system, electronic equipment and storage medium |
| CN115257599A (en) * | 2022-08-19 | 2022-11-01 | 奇瑞汽车股份有限公司 | Power supply method and system for automatic driving vehicle type |
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