CN220314925U - Low-voltage power supply system and vehicle - Google Patents
Low-voltage power supply system and vehicle Download PDFInfo
- Publication number
- CN220314925U CN220314925U CN202320801832.8U CN202320801832U CN220314925U CN 220314925 U CN220314925 U CN 220314925U CN 202320801832 U CN202320801832 U CN 202320801832U CN 220314925 U CN220314925 U CN 220314925U
- Authority
- CN
- China
- Prior art keywords
- low
- voltage power
- power supply
- vehicle
- storage battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000036541 health Effects 0.000 claims description 34
- 230000003862 health status Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a low-voltage power supply system and a vehicle, wherein the low-voltage power supply system comprises: a main battery and a backup battery; and the controller is connected with the main storage battery and the standby storage battery and is used for controlling the main storage battery and/or the standby storage battery to supply power to the low-voltage power utilization system according to the power supply request of the vehicle. The low-voltage power supply system can ensure the normal operation of the low-voltage power utilization system when the main storage battery fails, avoid serious accidents of vehicles, improve the reliability and safety of power supply of the low-voltage power supply system, and meet the power utilization requirement of the low-voltage power utilization system under extreme power utilization conditions.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a low-voltage power supply system and a vehicle.
Background
The low-voltage power system related to safety on the vehicle normally operates through the power supply of the low-voltage power system, wherein the low-voltage power system comprises a braking system, a steering system, a power system, a lighting system, a wiper control system and the like, and when the power supply of the low-voltage power system fails, the low-voltage power system cannot normally work, so that serious accidents of the vehicle, such as braking failure, failure in steering, failure of light at night, failure of wiper in rainy days and the like, are further caused, and the reliability and the safety of the power supply of the low-voltage power system are ensured.
In the related art, a low-voltage power consumption system of a vehicle supplies power through a storage battery of a low-voltage power supply system, the working voltage of the storage battery is 12V, the storage battery can output larger current for a short time to meet the power consumption requirement of the low-voltage power consumption system, that is, after an engine drives a generator to charge the storage battery or a high-voltage battery performs voltage conversion through a DC module and then supplies power to the storage battery, the electric energy of the storage battery is distributed to the low-voltage power consumption system through a low-voltage distribution box, wherein the low-voltage distribution box is subjected to fuse protection, but in the power supply mode of the low-voltage power supply system, when the storage battery fails, such as a pole short circuit or an open circuit, the vehicle is immediately powered down, at the moment, the low-voltage power consumption system cannot work normally, so that serious accidents occur to the vehicle, in addition, when the vehicle is converted from a pure electric driving mode to a hybrid driving mode, the load of the low-voltage power supply system is rapidly increased, or a plurality of subsystems of the low-voltage power consumption system can simultaneously run at full load under extreme electric conditions, at the moment, the peak current required by a plurality of subsystems of the low-voltage power consumption system can reach hundreds of amperes in a short time, and the low-voltage power consumption system cannot meet the requirements of the low-voltage power consumption system.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a low voltage power supply system, by which the low voltage power supply system can be ensured to operate normally when the main battery fails, so as to avoid serious accident of the vehicle, improve the reliability and safety of power supply of the low voltage power supply system, and meet the power demand of the low voltage power supply system under extreme power utilization conditions.
A second object of the utility model is to propose a vehicle.
In order to solve the above-mentioned problems, an embodiment of a first aspect of the present utility model proposes a low-voltage power supply system for a vehicle including a low-voltage power consumption system, the low-voltage power supply system comprising: a main battery and a backup battery; and the controller is connected with the main storage battery and the standby storage battery and is used for controlling the main storage battery and/or the standby storage battery to supply power to the low-voltage power utilization system according to the power supply request of the vehicle.
According to the low-voltage power supply system disclosed by the utility model, the standby storage battery is added on the basis of the main storage battery, the controller switches the power supply mode of the low-voltage power supply system through the power supply request of the vehicle so as to control the main storage battery and/or the standby storage battery to supply power to the low-voltage power supply system, namely, when the main storage battery fails, the standby storage battery is controlled to supply power to the low-voltage power supply system, so that the low-voltage power supply system can normally operate when the main storage battery fails, serious accidents of the vehicle are avoided, the reliability and the safety of the power supply of the low-voltage power supply system are improved, and the main storage battery and the standby storage battery are controlled to supply power to the low-voltage power supply system under extreme power utilization conditions, so that the power utilization requirement of the low-voltage power supply system under extreme power utilization conditions can be met.
In some embodiments, the controller comprises: the input end of the first switch unit is connected with the main storage battery, and the output end of the first switch unit is suitable for being connected with the low-voltage power utilization system; the first control unit is connected with the main storage battery and the control end of the first switch unit, and is used for controlling the conduction state of the first switch unit according to the power supply request of the vehicle, monitoring the health state of the main storage battery and sending an enabling request for the standby storage battery according to the health state of the main storage battery.
In some embodiments, the controller further comprises: the input end of the second switch unit is connected with the standby storage battery, and the output end of the second switch unit is suitable for being connected with the low-voltage power utilization system; the second control unit is connected with the standby storage battery and the control end of the second switch unit, and is used for controlling the conduction state of the second switch unit according to the power supply request and the starting request of the vehicle and monitoring the health state of the standby storage battery.
In some embodiments, the main storage battery is connected with the second control unit, and the main storage battery is used for supplying power to the first control unit and the second control unit; the standby storage battery is connected with the first control unit and is used for supplying power to the first control unit and the second control unit.
In some embodiments, the first control unit is connected to a vehicle controller of the vehicle through a CAN bus, and is configured to report a health status of the main battery to the vehicle controller; the second control unit is connected with the whole vehicle controller of the vehicle through a CAN bus and is used for reporting the health state of the standby storage battery to the whole vehicle controller.
In some embodiments, further comprising: the low-voltage distribution box comprises a first distribution group and a second distribution group, wherein the input end of the first distribution group is connected with the output end of the first switch unit, the output end of the first distribution group is connected with the low-voltage power utilization system, the input end of the second distribution group is connected with the output end of the second switch unit, and the output end of the second distribution group is connected with the low-voltage power utilization system.
In some embodiments, further comprising: the first end of the OBC module is connected with the charging port; the DC module is arranged in the OBC module, a first end of the DC module is connected with the OBC module, and a second end of the OBC module is connected with the standby storage battery and an input end of the first power distribution group and is used for converting a high-voltage signal into a low-voltage signal so as to supply power for the low-voltage power utilization system and charge the standby storage battery.
In some embodiments, further comprising: and the generator is connected with the engine of the vehicle and the main storage battery and is used for charging the main storage battery under the action of the engine.
An embodiment of a second aspect of the present utility model provides a vehicle including: a low voltage power system; the low-voltage power supply system according to the above embodiment, wherein the low-voltage power supply system is connected to the low-voltage power consumption system.
According to the vehicle provided by the utility model, through the low-voltage power utilization system, when the main storage battery fails, the normal operation of the low-voltage power utilization system can be ensured, serious accidents of the vehicle are avoided, the reliability and the safety of power supply of the low-voltage power supply system are improved, and the power utilization requirement of the low-voltage power utilization system under the extreme power utilization condition is met.
In some embodiments, the main battery of the low voltage power supply system is provided in a front compartment of the vehicle, and the backup battery of the low voltage power supply system is provided in a rear compartment of the vehicle.
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 block diagram of a low voltage power supply system according to one embodiment of the utility model;
FIG. 2 is a schematic diagram of a conventional low voltage power supply system;
FIG. 3 is a schematic diagram of a low voltage power supply system according to one embodiment of the utility model;
FIG. 4 is a flow chart of a controller control process according to one embodiment of the utility model;
FIG. 5 is a flow chart of a controller control process according to another embodiment of the utility model;
fig. 6 is a block diagram of a vehicle according to an embodiment of the utility model.
Reference numerals:
existing low voltage power supply systems: a high voltage battery 1'; a DC module 2'; a generator 3'; an engine 4'; a battery 5'; a low voltage distribution box 6';
a vehicle 100; a low voltage power supply system 90; a low voltage power system 80;
a main battery 1; a backup battery 2; a controller 3; a low voltage distribution box 4; an OBC module 5; a DC module 6; a generator 71; an engine 72; a motor 73; a contactor 74; a high voltage battery pack 75; a charging port 76; a first switching unit 31; a first control unit 32; a second switching unit 33; a second control unit 34; a first power distribution group 41; a second power distribution group 42.
Detailed Description
Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.
In order to solve the above-mentioned problems, an embodiment of a first aspect of the present utility model provides a low-voltage power supply system for a vehicle, where the vehicle includes a low-voltage power supply system, and the low-voltage power supply system can ensure that the low-voltage power supply system operates normally when a main battery fails, so as to avoid serious accidents of the vehicle, improve reliability and safety of power supply of the low-voltage power supply system, and meet power requirements of the low-voltage power supply system under extreme power utilization conditions.
A low voltage power supply system 90 according to an embodiment of the present utility model is described below with reference to fig. 1, and as shown in fig. 1, the low voltage power supply system 90 includes: a main battery 1, a backup battery 2, and a controller 3.
The controller 3 is connected to the main battery 1 and the backup battery 2, and is configured to control the main battery 1 and/or the backup battery 2 to supply power to the low-voltage power consumption system 90 according to a power supply request of the vehicle.
As shown in fig. 2, the low-voltage power supply system is a power supply schematic diagram of the existing low-voltage power supply system, the low-voltage power supply system supplies power to the low-voltage power supply system through a storage battery, the engine 4 'drives the generator 3' to charge the storage battery or the high-voltage battery 1 'supplies power to the storage battery 5' after voltage conversion through the DC module 2', the electric energy of the storage battery is distributed to the low-voltage power supply system through the low-voltage distribution box 6', the low-voltage power supply system comprises a VCU (Vehicular Communication Unit), a vehicle communication unit, an MCU (Microcontroller Unit, a micro control unit), a BMS (Battery Management System, a battery management system) and an ECU (Electronic Control Unit, and an electronic control unit), but in the power supply mode of the low-voltage power supply system, when the storage battery fails, such as a pole short circuit or an open circuit, the vehicle immediately fails, and serious accidents occur in the vehicle, in addition, when the vehicle is converted from a pure electric driving mode to a hybrid driving mode, the load of the low-voltage power supply system is required to be restarted, at this moment, the load of the low-voltage power supply system is rapidly increased, or a plurality of subsystems of the low-voltage power supply system are simultaneously operated under extreme electrical conditions, the low-voltage power supply system is fully loaded, and the low-voltage power supply system can not meet the low-voltage power supply system in a few hundred amperes of peak current requirements in a short-time.
In order to solve the above problem, in the present application, the low-voltage power supply system 90 adds the backup battery 2 on the basis of setting the main battery 1, and the controller 3 controls the main battery 1 and/or the backup battery 2 to supply power to the low-voltage power consumption system 80 according to the power supply request of the vehicle, that is, after the controller 3 receives the power supply request of the main battery 1 sent by the vehicle, the controller controls the main battery 1 to supply power to the low-voltage power consumption system 80; when the main battery 1 fails, after the controller 3 receives a power supply request of the standby battery 2 sent by the vehicle, the standby battery 2 is controlled to supply power to the low-voltage power utilization system 80, so that the low-voltage power utilization system 80 can be ensured to normally operate when the main battery 1 fails, serious accidents of the vehicle are avoided, the reliability and safety of power supply of the low-voltage power utilization system 90 are improved, for example, when the vehicle is converted from a pure electric mode to a hybrid driving mode or under extreme power utilization conditions, the controller 3 controls the main battery 1 and the standby battery 2 to supply power to the low-voltage power utilization system 80 according to the received power supply request sent by the vehicle, and the low-voltage power utilization system 90 meets the power utilization requirement of the low-voltage power utilization system 80. From this low-voltage power supply system 90 can switch main battery 1 and/or reserve battery 2 according to the power supply request intelligence of vehicle to low-voltage power consumption system 80 in this application for low-voltage power consumption system 80 can normal operating, avoids the vehicle to take place serious accident, has improved reliability and the security of low-voltage power supply system 90 power supply, and satisfies the power consumption demand of low-voltage power consumption system 80 under the extreme power consumption condition, has improved the power supply ability of low-voltage power consumption system 80.
In addition, when the vehicle is in a parked state, the backup battery 2 is controlled not to supply power to the low-voltage power consumption system 80, so as to prevent the backup battery 2 from consuming power due to long-time parking of the vehicle. The operating voltage of the main battery 1 and the backup battery 2 was 12V.
According to the low-voltage power supply system 90 disclosed by the utility model, the low-voltage power supply system 90 is provided with the standby storage battery 2 on the basis of arranging the main storage battery 1, the controller 3 switches the power supply mode of the low-voltage power supply system 90 through the power supply request of the vehicle so as to control the main storage battery 1 and/or the standby storage battery 2 to supply power to the low-voltage power utilization system 80, namely, when the main storage battery 1 fails, the standby storage battery 2 is controlled to supply power to the low-voltage power utilization system 80 so as to ensure that the low-voltage power utilization system 80 can normally operate when the main storage battery 1 fails, serious accidents of the vehicle are avoided, the reliability and the safety of the power supply of the low-voltage power supply system 90 are improved, and the main storage battery 1 and the standby storage battery 2 are controlled to supply power to the low-voltage power utilization system 80 under extreme power utilization conditions, so that the power utilization requirement of the low-voltage power utilization system 80 under extreme power utilization conditions can be met.
In some embodiments, as shown in fig. 3, the controller 3 includes: a first switching unit 31 and a first control unit 32.
Wherein the input end of the first switch unit 31 is connected with the main storage battery 1, and the output end of the first switch unit 31 is suitable for being connected with the low-voltage power utilization system 80; the first control unit 32 is connected to the main battery 1 and a control terminal of the first switch unit 31, and the first control unit 32 is configured to control a conductive state of the first switch unit 31 according to a power supply request of the vehicle, monitor a health state of the main battery 1, and send an activation request for the backup battery 2 according to the health state of the main battery 1.
Specifically, in the prior art, the state of the main battery 1 cannot be diagnosed in real time, in order to solve the problem, the low-voltage power supply system 90 of the present application adds the first control unit 32, the first control unit 32 monitors the health state of the main battery 1 in real time, that is, when the low-voltage power supply system 80 receives a power-on instruction, the first control unit 32 diagnoses the health state of the main battery 1 in real time, thereby judging whether the main battery 1 is available, that is, the first control unit 32 collects the voltage, the current and the internal resistance value of the main battery 1 through the singlechip, monitors the health state of the main battery 1 in real time, if the voltage of the main battery 1 is undervoltage or overvoltage, or the internal resistance value of the main battery 1 is too large or too small, the health state of the main battery 1 is monitored to be a fault state, the main battery 1 is determined to be unavailable, that the main battery 1 cannot supply power to the low-voltage power supply system 80, that is sent an enabling request for the standby battery 2 is sent, and the first switch unit 31 is controlled to be turned off in a preset time period, if the voltage of the main battery 1 is automatically monitored to be the voltage of the main battery 1, the voltage of the first control unit 1 is not available, when the low-voltage power supply system 80 is received to be connected to the low-voltage power supply system 80 is determined, the first power supply system 1 is normally is turned on, when the power supply system 1 is connected to the low power supply system 1 is determined to be connected to be the low power supply system 80, and the first power supply system 1 is determined to be normally is connected to be connected to the low power supply system 80, when the low-voltage power consumption system 80 is powered on, the on state of the first switch unit 31 is in a normally closed state, so that the health state of the main storage battery 1 is monitored by the first control unit 32 in the application, and the power supply safety of the low-voltage power supply system 90 is improved.
Further, the first switching unit 31 is in a normally closed state after the first control unit 32 completes monitoring the health state of the main battery 1 by default. Since the main battery 1 assumes the role of restarting the engine 72 when the vehicle is shifted from the pure electric mode to the hybrid drive mode in operation, the state of health of the main battery 1 is diagnosed online at a high diagnosis frequency, which may be 10 times/hour, to improve the diagnosis coverage.
In some embodiments, as shown in fig. 3, the controller 3 further comprises: a second switching unit 33 and a second control unit 34.
The input end of the second switch unit 33 is connected with the standby storage battery 2, and the output end of the second switch unit 33 is suitable for being connected with the low-voltage power utilization system 80; the second control unit 34 is connected to the backup battery 2 and a control terminal of the second switch unit 33, and the second control unit 34 is configured to control a conductive state of the second switch unit 33 according to a power supply request and an activation request of the vehicle, and to monitor a health state of the backup battery 2.
Specifically, in the prior art, the state of the backup battery 2 cannot be diagnosed in real time, in order to solve the problem, the low-voltage power supply system 90 of the present application adds the second control unit 34, monitors the health state of the backup battery 2 through the second control unit 34, that is, after the low-voltage power supply system 80 receives the power-on instruction, the second control unit 34 diagnoses the health state of the backup battery 2, so as to determine whether the backup battery 2 is available, that is, the second control unit 34 collects the voltage, the current and the internal resistance value of the backup battery 2 through the singlechip to monitor the health state of the backup battery 2 in real time, if the voltage of the backup battery 2 is under-voltage or over-voltage, or the internal resistance value of the backup battery 2 is too large or too small, the health state of the backup battery 2 is monitored to be a fault state, the low-voltage power supply system 80 is determined to be unavailable, if the voltage, the current and the resistance value of the backup battery 2 are normal, the health state of the backup battery 2 is monitored to be normal, if the low-voltage power supply system 2 is available, the low-voltage power supply system 2 is determined to be unavailable, and if the low-voltage power supply system 2 is required to be turned on, and if the low-voltage power supply system 2 is required to be turned on, and the low power supply system 33 is requested to be turned on; if there is no power supply request or start request of the vehicle, the on state of the second switch unit 33 is kept in the off state, that is, the power supply connection between the backup battery 2 and the low-voltage power consumption system 80 is disconnected, the backup battery 2 does not supply power to the low-voltage power consumption system 80, and after the power-up of the low-voltage power consumption system 80 is completed, the on state of the second switch unit 33 is in the normally open state. The state of health of the backup battery 2 is thereby monitored by the second control unit 34 in the present application, which improves the power supply safety of the low-voltage power supply system 90.
In addition, the backup battery need only be detected when the low voltage power system 80 is first powered up during each drive cycle. The first and second switching units may be contactors, which is not limited.
In some embodiments, the main battery 1 is connected to the second control unit 34, and the main battery 1 is used to power the first control unit 32 and the second control unit 34; the backup battery 2 is connected to the first control unit 32, and the backup battery 2 is used to supply power to the first control unit 32 and the second control unit 34. Specifically, as shown in fig. 3, since the positive electrode of the main battery 1 is connected to the first control unit 32 and the second control unit 34 through the power supply harness, the main battery 1 can supply power to the first control unit 32 and the second control unit 34 through the power supply harness, and since the positive electrode of the backup battery 2 is connected to the first control unit 32 and the second control unit 34 through the power supply harness, the positive electrode of the backup battery 2 supplies power to the first control unit 32 and the second control unit 34 through the power supply harness, whereby the power supply to the control units by the main battery 1 and the backup battery 2 in this application can ensure the reliability of the power supply of the first control unit 32 and the second control unit 34.
In some embodiments, the first control unit 32 is connected to the vehicle controller of the vehicle through a CAN bus (Controller Area Network, controller area network bus) for reporting the health status of the main battery 1 to the vehicle controller; the second control unit 34 is connected with the whole vehicle controller of the vehicle through the CAN bus, and is used for reporting the health state of the standby storage battery 2 to the whole vehicle controller.
Specifically, if the first control unit 32 monitors that the health status of the main battery 1 is a fault status, the health status of the main battery 1 is reported to the vehicle controller through the CAN bus, the CAN bus is a dotted line in fig. 3, that is, fault information of the main battery 1 is reported to the vehicle controller, and an enabling request for the spare battery 2 is sent to the vehicle controller; if the first control unit 32 monitors that the health state of the main storage battery 1 is in a normal state, reporting the health state of the main storage battery 1 to the whole vehicle controller through the CAN bus; if the second control unit 34 monitors that the health state of the backup battery 2 is a fault state, the health state of the backup battery 2 is reported to the vehicle controller through the CAN bus, i.e. fault information of the backup battery 2 is reported to the vehicle controller.
In some embodiments, as shown in fig. 3, the low voltage power supply system 90 further includes a low voltage distribution box 4, the low voltage distribution box 4 including a first distribution group 41 and a second distribution group 42.
The input end of the first power distribution group 41 is connected with the output end of the first switch unit 31, the output end of the first power distribution group 41 is connected with the low-voltage power utilization system 80, the input end of the second power distribution group 42 is connected with the output end of the second switch unit 33, and the output end of the second power distribution group 42 is connected with the low-voltage power utilization system 80.
Specifically, since the input end of the first power distribution group 41 is connected to the output end of the first switch unit 31, the output end of the first power distribution group 41 is connected to the low-voltage power consumption system 80, after the power supply request of the vehicle is received by the first control unit 32, the on state of the first switch unit 31 is controlled to be in the closed state, the power supply connection between the main storage battery 1 and the first power distribution group 41 is turned on, the main storage battery 1 supplies power to the first power distribution group 41, the first power distribution group 41 supplies power to the low-voltage power consumption system 80 through the power supply wire harness, the low-voltage power consumption system 80 comprises a power subsystem and a chassis subsystem, the power subsystem comprises MCU, BMS, VCU and an ECU, and the chassis subsystem comprises ABS (antilock brake system, an antilock brake system), ESP (Electronic Stability Program, a vehicle body electronic stability system) and EPS (Electric Power Steering, an electric power steering gear); since the input end of the second power distribution group 42 is connected to the output end of the second switch unit 33, the output end of the second power distribution group 42 is connected to the low-voltage power consumption system 80, and the second control unit 33 determines that there is a power supply request and an enabling request of the vehicle, then the on state of the second switch unit 33 is controlled to be in the closed state, the power connection between the backup battery 2 and the low-voltage power consumption system 80 is turned on, then the power connection between the backup battery 2 and the second power distribution group 42 is turned on, the backup battery 2 supplies power to the second power distribution group 42, and the second power distribution group 42 supplies power to the low-voltage power consumption system 80 through the power supply harness, so that the first power distribution group 41 and the second power distribution group 42 of the low-voltage power distribution box 4 can independently supply power to the low-voltage power consumption system 80.
In some embodiments, as shown in fig. 3, the low voltage power supply system 90 further includes an OBC module 5 and a DC module 6.
Wherein, a first end of an OBC (On Board Charger) module is connected with the charging port 76; the DC module is arranged in the OBC, a first end of the DC module 6 is connected with the OBC module 5, and a second end of the OBC module 5 is connected with the standby storage battery 2 and an input end of the first power distribution group 41 for converting a high-voltage signal into a low-voltage signal so as to supply power for the low-voltage power utilization system 80 and charge the standby storage battery 2.
Specifically, the low voltage power supply system 90 further includes a high voltage battery pack 75, the first end of the OBC module 5 is connected to the charging port 76, the OBC module 5 stores electric energy in the national power grid to the high voltage battery pack 75 through the charging port 76, the high voltage battery pack 75 is connected to the high voltage network by a contactor 74 to provide electric energy for the high voltage network, the DC module 6 disposed in the OBC module 5 converts high voltage signals in the high voltage network into low voltage signals, and since the second end of the OBC module 5 is connected to the standby battery 2 and the input end of the first distribution group 41, the OBC module 5 provides low voltage signals for the standby battery 2 and the first distribution group 41 to supply power to the low voltage power utilization system 80 and to charge the standby battery 2.
In addition, the motor 73, which is an integral driving motor and generator, supplies electric power to the high voltage network, and the motor controller MCU controls the operation mode of the motor, and if the operation mode is the driving mode, the motor consumes electric power in the high voltage battery pack 75, and if the operation mode is the generating mode, the high voltage battery pack 75 is charged with electric power by the electric power of the motor. The opening or closing of the contactor 74 is controlled by the BMS controller to cut off or switch on the power connection between the high voltage battery pack 75 and the high voltage network.
The control process of the controller is illustrated with reference to fig. 4, and the details are as follows.
Step S1, starting.
And S2, the low-voltage power utilization system receives a power-on instruction.
Step S3, the first control unit monitors the health state of the main storage battery.
And S4, the first control unit judges whether the main storage battery is in fault, if so, the step S5 is executed, and otherwise, the step S6 is executed.
And S5, the first control unit reports the fault information of the main storage battery to the whole vehicle controller, and sends an enabling request for the standby storage battery to the whole vehicle controller, and step S15 is executed.
And S6, reporting the health state of the main storage battery to the whole vehicle controller by the first control unit, and controlling the first switch unit to be closed.
And S7, supplying power to the low-voltage power utilization system by the main storage battery, and executing the step S15.
In step S8, the second control unit monitors the state of health of the backup battery.
Step S9, the second control unit determines whether the backup battery is faulty, if yes, step S10 is executed, and otherwise step S11 is executed.
And step S10, the second control unit reports fault information of the standby storage battery to the whole vehicle controller, and step S15 is executed.
And S11, reporting the state of health of the standby storage battery to the whole vehicle controller by the second control unit, and keeping the second switch unit to be disconnected.
In step S12, the second control unit determines whether the vehicle has a power supply request, and if so, executes step S13, otherwise executes step S14.
And S13, the second control unit controls the second switch unit to be closed, the standby storage battery supplies power for the low-voltage power utilization system, and step S15 is executed.
Step S14, the second control unit works normally, and the second control unit controls the second switch unit to be switched off, so that step S15 is executed.
Step S15, ends.
In some embodiments, as shown in fig. 3, the low voltage power supply system further includes a generator 71. The generator 71 is connected to an engine 72 and the main battery 1 of the vehicle, and is configured to charge the main battery 1 by the engine 72. That is, the engine 72 is started and operated, and then the belt drives the generator 71 to generate electricity, and the main battery 1 is charged with the generated electricity of the generator 71 by the engine 72.
The control process of the controller is illustrated below with reference to fig. 5, and the details are as follows.
Step S16, start.
And S17, the first switch unit is in a normally closed state, the second switch unit is in a normally open state, and the main storage battery supplies power for the low-voltage power utilization system.
Step S18, the generator charges the main storage battery under the action of the engine.
In step S19, the DC module converts the electrical energy into a low voltage signal to power the low voltage electrical system and charge the backup battery.
In step S20, the BMS controller determines whether the high-voltage battery pack is defective, and if so, performs step S28, otherwise, performs step S21.
In step S21, the BMS controller controls the contactor to be opened, and the main storage battery individually supplies power to the low voltage power system.
In step S22, the first control unit determines whether the main battery is faulty, if yes, step S28 is executed, and otherwise step S23 is executed.
Step S23, transmitting an enabling request for the standby storage battery and controlling the first switch unit to be turned off in a preset time period
In step S24, the second control unit receives an enabling request of the backup battery.
In step S25, the second control unit determines whether the backup battery is faulty, if so, step S27 is executed, and otherwise, step S26 is executed.
Step S26, the low-voltage power consumption system loses power, and step S28 is executed.
And S27, controlling the second switch unit to be closed, and supplying power for the low-voltage power utilization system by using the standby storage battery.
Step S28, the low-voltage power utilization system operates normally.
Step S29, ends.
A second aspect of the present utility model provides a vehicle 100, as shown in fig. 6, the vehicle 100 including: the low voltage power system 80 and the low voltage power supply system 90 of the above embodiment, wherein the low voltage power supply system 90 is connected to the low voltage power system 80.
According to the vehicle provided by the utility model, through the low-voltage power supply system 90 in the embodiment, the normal operation of the low-voltage power utilization system 80 can be ensured when the main storage battery 1 fails, serious accidents of the vehicle are avoided, the reliability and the safety of power supply of the low-voltage power supply system 90 are improved, and the power utilization requirement of the low-voltage power utilization system 80 under the extreme power utilization condition is met.
In some embodiments, as shown in fig. 3, the main battery 1 of the low-voltage power supply system 90 is provided in the front compartment of the vehicle, and the backup battery 2 of the low-voltage power supply system 90 is provided in the rear compartment of the vehicle, so that the probability of damage to the main battery 1 and the backup battery 2 is reduced when a rear-end collision or a rear-end collision of the vehicle occurs. For example, the main battery 1 is provided in the cabin of the engine 72, and the backup battery 2 is provided in the trunk of the vehicle
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 low voltage power supply system for a vehicle, the vehicle including a low voltage power usage system, the low voltage power supply system comprising:
a main battery and a backup battery;
the controller comprises a first control unit and a second control unit;
the first control unit is connected with the main storage battery, and is used for monitoring the health state of the main storage battery and sending an enabling request for the standby storage battery according to the power supply request of the vehicle and the health state of the main storage battery;
the second control unit is connected with the standby storage battery and is used for monitoring the health state of the standby storage battery and controlling the standby storage battery to supply power to the low-voltage power utilization system according to the power supply request of the vehicle, the health state of the standby storage battery and the starting request.
2. The low voltage power supply system of claim 1, wherein the controller further comprises:
the input end of the first switch unit is connected with the main storage battery, and the output end of the first switch unit is suitable for being connected with the low-voltage power utilization system;
the first control unit is connected with the control end of the first switch unit and is used for controlling the conduction state of the first switch unit according to the power supply request of the vehicle.
3. The low voltage power supply system of claim 2, wherein the controller further comprises:
the input end of the second switch unit is connected with the standby storage battery, and the output end of the second switch unit is suitable for being connected with the low-voltage power utilization system;
the second control unit is connected with the control end of the second switch unit and is used for controlling the conduction state of the second switch unit according to the power supply request and the starting request of the vehicle.
4. A low voltage power supply system according to claim 3, wherein the main battery is connected to the second control unit, the main battery being adapted to power the first control unit, the second control unit;
the standby storage battery is connected with the first control unit and is used for supplying power to the first control unit and the second control unit.
5. The low voltage power supply system according to claim 3, wherein the first control unit is connected to a vehicle controller of the vehicle through a CAN bus, and is configured to report a health status of the main battery to the vehicle controller;
the second control unit is connected with the whole vehicle controller of the vehicle through a CAN bus and is used for reporting the health state of the standby storage battery to the whole vehicle controller.
6. The low voltage power supply system of any of claims 3-5, further comprising:
the low-voltage distribution box comprises a first distribution group and a second distribution group, wherein the input end of the first distribution group is connected with the output end of the first switch unit, the output end of the first distribution group is connected with the low-voltage power utilization system, the input end of the second distribution group is connected with the output end of the second switch unit, and the output end of the second distribution group is connected with the low-voltage power utilization system.
7. The low voltage power supply system of claim 6, further comprising:
the first end of the OBC module is connected with the charging port;
the DC module is arranged in the OBC module, a first end of the DC module is connected with the OBC module, and a second end of the OBC module is connected with the standby storage battery and an input end of the first power distribution group and is used for converting a high-voltage signal into a low-voltage signal so as to supply power for the low-voltage power utilization system and charge the standby storage battery.
8. The low voltage power supply system of claim 1, further comprising:
and the generator is connected with the engine of the vehicle and the main storage battery and is used for charging the main storage battery under the action of the engine.
9. A vehicle, characterized by comprising:
a low voltage power system;
the low voltage power supply system of any one of claims 1-8, connected to the low voltage power system.
10. The vehicle of claim 9, wherein a main battery of the low voltage power supply system is provided in a front compartment of the vehicle and a backup battery of the low voltage power supply system is provided in a rear compartment of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320801832.8U CN220314925U (en) | 2023-04-03 | 2023-04-03 | Low-voltage power supply system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320801832.8U CN220314925U (en) | 2023-04-03 | 2023-04-03 | Low-voltage power supply system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220314925U true CN220314925U (en) | 2024-01-09 |
Family
ID=89418714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320801832.8U Active CN220314925U (en) | 2023-04-03 | 2023-04-03 | Low-voltage power supply system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220314925U (en) |
-
2023
- 2023-04-03 CN CN202320801832.8U patent/CN220314925U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100829307B1 (en) | Fault diagnosis control method for high voltage relay of hybrid electric vehicle | |
| CN209534756U (en) | Highly integrated auxiliary drive controller, control system and new-energy automobile | |
| CN211032455U (en) | Double-storage-battery electric energy management system | |
| CN112751408A (en) | Power supply circuit and power supply method | |
| CN111546938B (en) | Vehicle hybrid storage battery management system and method | |
| CN112659969A (en) | Double-branch power battery control system and method | |
| CN112018750A (en) | Vehicle-mounted dual-power supply system | |
| CN114475483A (en) | Function safety-based complete vehicle low-voltage power supply redundant loop, control method and vehicle | |
| CN112895902B (en) | Power distribution system, control method of power distribution system and new energy automobile | |
| CN220314925U (en) | Low-voltage power supply system and vehicle | |
| CN115366833B (en) | Redundant power supply controller of mine unmanned vehicle | |
| CN116141974A (en) | Vehicle power supply device, power supply method and vehicle | |
| CN116141965A (en) | Low-voltage power supply device and method for electric vehicle and electric vehicle | |
| CN215452535U (en) | Battery system | |
| CN112072630B (en) | Control device and method for automobile high-voltage power distribution system and automobile | |
| CN114243824A (en) | Electric automobile power management module, electric automobile and power management method | |
| CN106915316A (en) | For the power-supply system and power control method of idling start and stop vehicle | |
| CN111634247A (en) | Vehicle double-battery energy supply system and control method thereof | |
| CN218141048U (en) | Electric automobile power supply system and electric automobile | |
| CN212695713U (en) | Vehicle-mounted dual-power supply system | |
| CN216709035U (en) | Power control system and car | |
| CN221188429U (en) | Regional power distribution system and vehicle | |
| CN115743004A (en) | Redundant power supply system of commercial vehicle and control method | |
| CN113212167B (en) | Relay closing auxiliary system and method | |
| CN115257581B (en) | High-voltage electrical architecture of electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |