CN115241954A - Intelligent power distribution management system and method for vehicle - Google Patents
Intelligent power distribution management system and method for vehicle Download PDFInfo
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- CN115241954A CN115241954A CN202210973692.2A CN202210973692A CN115241954A CN 115241954 A CN115241954 A CN 115241954A CN 202210973692 A CN202210973692 A CN 202210973692A CN 115241954 A CN115241954 A CN 115241954A
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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
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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
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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
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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
- B60R16/023—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 transmission of signals between vehicle parts or subsystems
- B60R16/0238—Electrical distribution centers
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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
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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
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- Power Engineering (AREA)
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Abstract
The invention discloses an intelligent power distribution management system and method for a vehicle, wherein the intelligent power distribution management system for the vehicle comprises: the intelligent power distribution system comprises a power isolation unit, a control unit and an intelligent power distribution unit, wherein a first power supply and a second power supply are respectively connected to the power isolation unit and respectively supply power to non-safety related loads and safety related loads; the power isolation unit is electrically connected with the control unit and is used for transmitting the first detection parameter to the control unit; the intelligent power distribution unit is electrically connected with the control unit and is used for transmitting the second detection parameter to the control unit; the control unit is used for controlling the power isolation unit and the intelligent power distribution unit to be switched on or switched off respectively according to the first detection parameter and the second detection parameter; wherein, the intelligent power distribution unit is used for external load power distribution. The technical scheme of the invention can isolate the redundant power supply of the safety-related load from the redundant power supply of the non-safety-related load.
Description
Technical Field
The embodiment of the invention relates to the technical field of automobiles, in particular to an intelligent power distribution management system and method for an automobile.
Background
With the development trend of automobile electromotion, intellectualization and sharing in recent years, the electrical architecture of the whole automobile evolves along with the development trend, and the evolution puts higher requirements on the low-voltage power supply of the whole automobile, particularly the intelligent development of the automobile, and the requirement on the controllability, safety and reliability of the low-voltage power supply of the whole automobile is met.
Currently, designs with less inefficient electronics and structurally redundant power supplies are often employed. However, the conventional entire vehicle power supply basically comprises a wire harness (copper bar), a connector, a fuse and a screw fastener, and lacks monitoring and protection for the whole power supply network, so that the power supply function failure caused by reasons such as the failure of the conventional fuse, the loosening of the fastener, the over-temperature fusing caused by overcurrent of the wire harness and the like often occurs. In addition, for a redundant power supply structure, a high-voltage power battery and a low-voltage battery are used for supplying power to loads such as an electronic control unit and an actuator of the whole vehicle together through a direct-current converter, and some safety-related controllers or actuators are isolated from non-safety-related controllers or actuators, so that the power supply failure of the non-safety-related loads is prevented from influencing the power supply of the safety-related loads, and therefore the redundant power supply of the safety-related loads needs to be isolated.
Disclosure of Invention
The invention provides an intelligent power distribution management system and method for a vehicle, which are used for realizing the isolation of a redundant power supply of safety-related loads and a redundant power supply of non-safety-related loads and avoiding the influence of power failure of the non-safety-related loads on the power supply of the safety-related loads.
In a first aspect, an embodiment of the present invention provides an intelligent power distribution management system for a vehicle, including: the intelligent power distribution system comprises a power isolation unit, a control unit and an intelligent power distribution unit; the first end of the power isolation unit is connected with a first power supply and a non-safety related load, the second end of the power isolation unit is connected with the intelligent power distribution unit and a second power supply, and the intelligent power distribution unit is in power supply connection with the safety related load; the control unit is connected with the power isolation unit and the intelligent power distribution unit and is used for controlling the power isolation unit to connect or disconnect the first end and the second end; the control unit is used for controlling the power isolation unit to disconnect the first end and the second end when the non-safety related load side has an abnormal condition, so that the second power supply source can independently supply power for the safety related load. Transmitting the first detection parameter to the control unit; the intelligent power distribution unit is electrically connected with the control unit and is used for transmitting the second detection parameter to the control unit; the control unit is used for controlling the power isolation unit and the intelligent power distribution unit to be switched on or switched off respectively according to the first detection parameter and the second detection parameter; wherein, the intelligent power distribution unit is used for external load power distribution. Optionally, the first detection parameter includes: a first current-related parameter and a first temperature-related parameter; the second detection parameter includes: a second current-related parameter and a second temperature-related parameter.
Optionally, the power isolation unit includes: the first power supply comprises a high-voltage power battery, the second power supply comprises a low-voltage storage battery, and the high-voltage power battery is connected with the first end of the power isolation unit; the first end of the intelligent power distribution unit is connected with the second end of the power isolation unit and the second power supply source, and the second end of the intelligent power distribution unit is connected with the safety-related load.
Optionally, the first end of the intelligent power distribution unit is connected to the second end of the power isolation unit; the second power supply is connected with the second end of the power isolation unit; the safety-related load is connected with the second end of the intelligent power distribution unit; the first detection parameter includes: a first current-related parameter and a first temperature-related parameter; the second detection parameter includes: a second current-related parameter and a second temperature-related parameter.
Optionally, the power isolation unit includes: the temperature sensor comprises a first switch, a second switch, a first sampling resistor, a first temperature sensor and a first driving chip; the first switch, the second switch and the first adoption resistor are connected in series between the first end and the second end of the power isolation unit; the first driving chip is used for controlling the on and off of the first switch and the second switch.
Optionally, the first sampling resistor converts a current flowing through the first switch and the second switch into a first voltage signal; the first driving chip performs differential sampling and amplifies the first voltage signal to obtain a first current related parameter, and sends the first current related parameter to a control unit; if the first current-related parameter is greater than a first current threshold, the control unit controls the first driving chip to disconnect the first switch and the second switch; if the first current-related parameter is less than or equal to the first current threshold, the control unit controls the first driving chip to close the first switch and the second switch.
Optionally, the first temperature sensor is configured to measure the first temperature-related parameter of the first switch and the second switch, and send the first temperature-related parameter to the control unit through the first driving chip; if the first temperature-related parameter is greater than a first temperature threshold, the control unit controls the first driving chip to disconnect the first switch and the second switch; if the first temperature-related parameter is less than or equal to the first temperature threshold, the control unit controls the first charging unit to close the first switch and the second switch.
Optionally, the intelligent power distribution unit includes a third switch, a second sampling resistor, a second temperature sensor, and a second driver chip.
Optionally, the second sampling resistor converts a current flowing through the third switch into a second voltage signal; the second driving chip differentially samples and amplifies the second voltage signal to obtain a second current related parameter, and the second current related parameter is sent to a control unit; if the second current-related parameter is greater than a second current threshold, the control unit controls the second driving chip to disconnect the third switch; if the second current-related parameter is less than or equal to the second current threshold, the control unit controls the second driving chip to close the third switch.
Optionally, the second temperature sensor is configured to measure the second temperature-related parameter of the third switch, and send the second temperature-related parameter to the control unit through the second driving chip; if the second temperature-related parameter is greater than a second temperature threshold, the control unit controls the second driving chip to disconnect the third switch; if the second temperature-related parameter is less than or equal to the second temperature threshold, the control unit controls the second driving chip to close the third switch.
Optionally, the control unit is further configured to collect a current of the intelligent power distribution unit, and perform integration in time to evaluate a power consumption state of the load.
In a second aspect, the present invention provides an intelligent power distribution management method for a vehicle, including: connecting a first end of a power isolation unit with a first power supply and a non-safety related load, connecting a second end of the power isolation unit with the intelligent power distribution unit and a second power supply, and connecting the intelligent power distribution unit with a safety related load in a power supply manner; the control unit is connected with the power isolation unit and the intelligent power distribution unit and controls the power isolation unit to connect or disconnect the first end and the second end; when the abnormal condition occurs at the non-safety related load side, the control unit controls the power isolation unit to disconnect the first end and the second end so that the second power supply source independently supplies power for the safety related load; transmitting the first detection parameter to the control unit; the intelligent power distribution unit is electrically connected with the control unit, and second detection parameters are transmitted to the control unit; the control unit respectively controls the power isolation unit and the intelligent power distribution unit to be switched on or switched off according to the first detection parameter and the second detection parameter;
wherein, the intelligent power distribution unit is used for external load distribution.
The invention provides an intelligent power distribution management system and method for a vehicle, wherein the system comprises: the intelligent power distribution system comprises a power isolation unit, a control unit and an intelligent power distribution unit, wherein a first power supply and a second power supply are respectively connected to the power isolation unit and respectively supply power to non-safety related loads and safety related loads, the power isolation unit is electrically connected with the control unit and is used for transmitting a first detection parameter to the control unit, the intelligent power distribution unit is electrically connected with the control unit and is used for transmitting a second detection parameter to the control unit, and the control unit is used for respectively controlling the on/off of the power isolation unit and the intelligent power distribution unit according to the first detection parameter and the second detection parameter; wherein, the intelligent power distribution unit is used for external load power distribution. Compared with the prior art, the power supply isolation unit is controlled to be switched on or switched off, so that redundant power supply isolation between the first power supply for supplying power to the non-safety-related load and the second power supply for supplying power to the safety-related load is controlled, the power supply failure of the non-safety-related load is prevented from influencing the power supply of the safety-related load, and the power supply safety of the safety-related load is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent power distribution management system for a vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an intelligent power distribution management system for a vehicle in a complete vehicle redundant power supply scenario according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another vehicle intelligent power distribution management system in a complete vehicle redundant power supply scenario according to an embodiment of the present invention;
fig. 4 is a hardware schematic diagram of an intelligent power distribution management system for a vehicle according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an operating state of an intelligent power distribution management system for a vehicle according to an embodiment of the present invention;
fig. 6 is a diagram illustrating an intelligent power distribution management method for a vehicle according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of an intelligent power distribution management system 50 for a vehicle according to an embodiment of the present invention, where fig. 1 is only used to show a connection relationship of the intelligent power distribution management system 50 for a vehicle, and a specific connection structure of the intelligent power distribution management system 50 is not limited, and a person skilled in the art may select a connection structure as needed. Referring to fig. 1, the intelligent power distribution management system 50 for a vehicle includes: a power isolation unit 510, a control unit 530, and an intelligent power distribution unit 520; a first end of the power isolation unit 510 is connected to a first power supply a and a non-safety-related load 40, a second end of the power isolation unit 510 is connected to the intelligent power distribution unit 520 and a second power supply B, and the intelligent power distribution unit 520 is in power supply connection with a safety-related load 60; the control unit 530 is connected to the power isolation unit 510 and the intelligent power distribution unit 520, and is configured to control the power isolation unit 510 to connect or disconnect the first terminal and the second terminal; the control unit 530 is configured to control the power isolation unit 510 to disconnect the first terminal and the second terminal when an abnormal condition occurs on the non-safety-related load 40 side, so that the second power supply B independently supplies power to the safety-related load 60.
Specifically, the safety-related load 60 refers to components related to securing safe driving of the automobile, such as: traction Control System (TCS), tire pressure detection System, electronic vehicle Stability Control System (ESP), and the like; the non-safety-related load 40 refers to a component not related to safe driving of the automobile, for example: air conditioning systems, electrical seat heating systems, and the like.
The control unit 530, the power isolation unit 510 is electrically connected to the control unit 530, and is configured to transmit the first detection parameter to the control unit 530; the intelligent power distribution unit 520 is electrically connected with the control unit 530, and is used for transmitting the second detection parameter to the control unit 530;
specifically, the first detection parameter refers to a parameter obtained by performing relevant data detection on the power isolation unit 510, and may be multiple, for example: the current flowing through the power isolation unit 510 and the temperature of some components in the power isolation unit 510 are respectively transmitted to the control unit 530 through a plurality of channels.
Specifically, the external load refers to a load externally connected to the automobile, and may be one or more of: mobile phones and other electric devices.
Illustratively, the control unit 530 may control the power isolation unit 510 to be turned on or turned off according to whether the first detection parameter is greater than a preset threshold, and control the intelligent power distribution unit 520 to be turned on or turned off according to whether the second detection parameter is greater than the preset threshold, so as to find out whether the power isolation unit 510 and the intelligent power distribution unit 520 are abnormal in time, and perform corresponding operations, thereby improving the safety of the operation of the power isolation unit 510 and the intelligent power distribution unit 520.
Wherein, the intelligent power distribution unit 520 is used for external load power distribution.
Optionally, the first power supply a includes a high-voltage power battery, and the second power supply B includes a low-voltage storage battery, and the high-voltage power battery is connected to the first end of the power isolation unit 510; the first end of the intelligent power distribution unit 520 is connected to the second end of the power isolation unit 510 and the second power supply B, and the second end of the intelligent power distribution unit 520 is connected to the safety-related load 60.
Fig. 2 is a schematic structural diagram of an intelligent power distribution management system 50 in a vehicle redundant power supply scenario according to an embodiment of the present invention. Referring to fig. 2, a first power supply a is a high voltage power battery pack 10, the first power supply a adjusts a high voltage into a low voltage through a dc converter 20 and is connected to a power isolation unit 510, the power isolation unit 510 is connected to a fuse box 30 connected to a safety-related load 60 to provide redundant power for the safety-related load 60, and simultaneously adjusts the high voltage into a low voltage through the dc converter 20 and is connected to another fuse box 30 connected to a non-safety-related load 40 to provide power for the non-safety-related load 40; the second power supply B is a low voltage battery 70 connected to the first end of the intelligent power distribution unit 520, and the second end of the intelligent power distribution unit 520 supplies power to the safety-related loads 60. When a short circuit to ground fault occurs on one side of the non-safety related load 40, the power isolation unit 510 is disconnected, and the safety related load 60 is powered by the low-voltage storage battery 70, so that the condition that the power supply failure of the non-safety related load 40 affects the power supply of the safety related load 60 is avoided; accordingly, when a short-to-ground fault occurs on one side of the safety-related load 60, the power isolation unit 510 will also be turned off, preventing the functions between the safety-related loads 60 from being affected by each other, and preventing the power supply to the non-safety-related loads 40 from being affected.
Exemplarily, fig. 3 is a schematic structural diagram of another intelligent power distribution management system 50 provided in the embodiment of the present invention in a vehicle redundant power supply scenario. Referring to fig. 3, when the first power supply a is a low-voltage battery a80, the low-voltage battery a80 supplies power to the non-safety-related load 40 through the fuse box 30, and is connected to the power isolation unit 510, and the power isolation unit 510 is connected to the fuse box 30 to which the safety-related load 60 is connected, so as to provide redundant power to the safety-related load 60; the second power supply B is a low-voltage battery B90, which is connected to the fuse box 30 to which the safety-related load 60 is connected, and supplies power to the safety-related load 60. When a short-circuit to ground fault occurs on one side of the non-safety related load 40, the power isolation unit 510 is disconnected, and the safety related load 60 is powered by the low-voltage storage battery B90, so that the condition that the power supply failure of the non-safety related load 40 affects the power supply of the safety related load 60 is avoided; accordingly, when a short-to-ground fault occurs on one side of the safety-related load 60, the power isolation unit 510 will also be turned off, preventing the functions between the safety-related loads 60 from being affected by each other, and preventing the power supply to the non-safety-related loads 40 from being affected.
Optionally, the first end of the intelligent power distribution unit 520 is connected to the second end of the power isolation unit 510; the second power supply B is connected to the second end of the power isolation unit 510; the safety related load 60 is connected to a second end of the intelligent power distribution unit; the first detection parameter includes: a first current-related parameter and a first temperature-related parameter; the second detection parameter includes: a second current-related parameter and a second temperature-related parameter.
Specifically, the first current-related parameter refers to data representing the magnitude of the current flowing through the power isolation unit 510, and the first temperature-related parameter refers to data representing the temperature of the components in the power isolation unit 510; the second current-related parameter is data indicating the magnitude of the current flowing through the intelligent power distribution unit 520, and the second temperature-related coefficient is data indicating the temperature of the components in the intelligent power distribution unit 520.
Optionally, the power isolation unit 510 includes: the device comprises a first switch S1, a second switch S2, a first sampling resistor RS1, a first temperature sensor RT1 and a first driving chip; the first driving chip is used for controlling the on and off of the first switch and the second switch.
Specifically, fig. 4 is a hardware schematic diagram of an intelligent power distribution management system for a vehicle according to an embodiment of the present invention. Referring to fig. 4, the first switch S1 and the second switch S2 may be mosfets, and the first switch S1 and the second switch S2 are connected in series; the first sampling resistor RS1 is connected in series between the first switch S1 and the second switch S2, and is connected in parallel with the first driver chip 5101; the first temperature sensor RT1 may be a temperature sensitive resistor with a negative temperature coefficient, connected in parallel with the first sampling resistor RS1, and connected in parallel with the first driver chip 5101; the first driver chip 5101 is connected in parallel to two ends of the first switch S1 and the second switch S2, and the first driver chip 5101 may perform data transmission with the control unit 530 through a plurality of paths, and control the first switch and the second switch to be turned on and off according to a received instruction of the control unit 530.
Wherein the plurality of passages includes a first passage FS1, a second passage FS2, a third passage FS3, a fourth passage CS1, and a fifth passage CS2.
Optionally, the first sampling resistor RS1 converts the current flowing through the first switch S1 and the second switch S2 into a first voltage signal; the first driver chip 5101 differentially samples and amplifies the first voltage signal to obtain a first current-related parameter, and transmits the first current-related parameter to the control unit 530; if the first current-related parameter is greater than the first current threshold, the control unit 530 controls the first driving chip 5101 to turn off the first switch S1 and the second switch S2; if the first current-related parameter is less than or equal to the first current threshold, the control unit 530 controls the first driving chip 5101 to close the first switch S1 and the second switch S2.
Specifically, after the first sampling resistor RS1 converts the current flowing through the first switch S1 and the second switch S2 into a first voltage signal, the first driving chip 5101 samples the first voltage signal through difference and amplifies the first voltage signal to obtain a first current-related parameter, the control unit 530 receives the first current-related parameter through the first path FS1 and compares the first current-related parameter with a prestored first current threshold, if the first current-related parameter is greater than the first current threshold, a first disconnection instruction and a second disconnection instruction are generated and sent to the first driving chip 5101 through the fourth path CS1 and the fifth path CS2, respectively, and the first driving chip 5101 controls the first switch S1 and the second switch S2 to be disconnected according to the first disconnection instruction and the second disconnection instruction, so that the first switch and the second switch are prevented from being damaged due to overcurrent due to excessive current, monitoring of the current isolation unit is achieved, and the operation safety of the current isolation unit is improved; meanwhile, the direction of the current is judged according to the first current related parameter, namely, whether the current flows from the first switch S1 to the second switch S2 or from the second switch S2 to the first switch S1.
Optionally, the first temperature sensor RT1 is configured to measure a first temperature-related parameter of the first switch S1 and the second switch S2, and send the first temperature-related parameter to the control unit 530 through the first driving chip; if the first temperature-related parameter is greater than the first temperature threshold, the control unit 530 controls the first driver chip 5101 to turn off the first switch S1 and the second switch S2; if the first temperature-related parameter is less than or equal to the first temperature threshold, the control unit 530 controls the first driving unit 5101 to close the first switch S1 and the second switch S2.
Specifically, the first temperature sensor RT1 may be a negative temperature coefficient temperature sensitive resistor, and the first driver chip 5101 obtains a corresponding first temperature related parameter according to a voltage value of the negative temperature coefficient temperature sensitive resistor by detecting the voltage value of the negative temperature coefficient temperature sensitive resistor, and sends the first temperature related parameter to the control unit 530 through the second path FS 2. If the first temperature-related parameter received by the control unit 530 is greater than the first temperature threshold, a first turn-off instruction and a second turn-off instruction are generated, and the first turn-off instruction and the second turn-off instruction are sent to the first driver chip 5101 through the fourth path CS1 and the fifth path CS2, and the first driver chip 5101 turns off the first switch S1 and the second switch S2 according to the first turn-off instruction and the second turn-off instruction, respectively.
Optionally, the intelligent power distribution unit 520 includes a third switch, a second sampling resistor, a second temperature sensor, and a second driving chip.
With continued reference to fig. 4, in particular, the third switch S3 may be a Mosfet; the third switch S3 is connected in series with the second sampling resistor RS2, and the second sampling resistor RS2 is connected in parallel with the second driving chip 5201. The second temperature sensor RT2 may be a negative temperature coefficient temperature sensitive resistor, and the second temperature sensor RT2 is connected in parallel with the second driving chip 5201.
When the third switch is turned on, the third switch can be used for supplying power to an external load.
Optionally, the second sampling resistor RS2 converts the current flowing through the third switch S3 into a second voltage signal; the second driving chip 5201 performs differential sampling and amplifies the second voltage signal to obtain a second current-related parameter, and sends the second current-related parameter to the control unit 530; if the second current-related parameter is greater than the second current threshold, the control unit 530 controls the second driving chip 5201 to open the third switch S3; if the second current-related parameter is smaller than or equal to the second current threshold, the control unit 530 controls the second driving chip 5201 to close the third switch S3.
Among them, signals are transmitted between the second driving chip 5201 and the control unit 530 through the sixth path FB1, the seventh path FB2, the eighth path FB3 and the ninth path CC 1.
Specifically, after the second sampling resistor RS2 converts the current flowing through the third switch S3 into a second voltage signal, the second driving chip 5201 samples the second voltage signal through a difference, and amplifies the second voltage signal to obtain a first current-related parameter, the control unit 530 receives the second current-related parameter through the sixth path FB1, compares the second current-related parameter with a prestored second current threshold, and if the second current-related parameter is greater than the second current threshold, it indicates that the intelligent power distribution unit is over-current and a short-to-ground fault occurs in the power supply circuit, generates a third disconnection instruction, and sends the third disconnection instruction to the second driving unit 5201 through the ninth path CC1, and the second driving unit 5201 controls the third switch S3 to be disconnected according to the disconnection instruction, thereby avoiding the over-current damage of the third switch, realizing monitoring of the intelligent power distribution unit, and improving the safety of the operation of the intelligent power distribution unit.
Optionally, the second temperature sensor RT2 is configured to measure a second temperature-related parameter of the third switch S3, and send the second temperature-related parameter to the control unit 530 through the second driving chip 5201; if the second temperature-related parameter is greater than the second temperature threshold, the control unit 530 controls the second driving chip 5201 to open the third switch S3; if the second temperature-related parameter is less than or equal to the second temperature threshold, the control unit 530 controls the second driving chip 5201 to close the third switch S3.
Specifically, the second temperature sensor RT2 may be a negative temperature coefficient temperature-sensitive resistor, and the second driving chip 5201 obtains a corresponding second temperature-related parameter by detecting a voltage value of the negative temperature coefficient temperature-sensitive resistor, and sends the second temperature-related parameter to the control unit 530 through the seventh path FB 2. If the control unit 530 receives that the second temperature-related parameter is greater than the second temperature threshold, a third turn-off instruction is generated and sent to the second driving chip 5201 through the ninth channel CC1, and the second driving chip 5201 turns off the third switch S3 according to the third turn-off instruction, so that the third switch is prevented from being damaged due to over-temperature caused by over-high temperature, the temperature monitoring of the intelligent power distribution unit is realized, and the operation safety of the intelligent power distribution unit is improved.
Optionally, the control unit 530 is further configured to collect the current of the intelligent power distribution unit 520, and perform integration in time to evaluate the power consumption state of the load.
Specifically, the control unit 530 obtains the amount of current flowing through the second sampling resistor by integrating the current flowing through the second sampling resistor RS2 in time, and is used for evaluating the power consumption state of the load. When the amount of current flowing through the second sampling resistor RT2 is greater than the first threshold, it indicates that the power consumption of the external load is abnormal, and at this time, the current amount information is sent to the vehicle controller (not shown in the figure), the vehicle controller generates a turn-off command according to the current amount information, and sends the turn-off command to the control unit 530, and the control unit 530 turns off the third switch S3 according to the turn-off command, and stops supplying power to the external load.
The intelligent power distribution unit can be a plurality of units, and the external load can also be a plurality of units. When the external loads are multiple, the vehicle control unit can also determine one or more external loads with high power consumption according to the current magnitude information and generate multiple turn-off instructions, and the controller turns off the corresponding intelligent power distribution module according to the turn-off instructions and stops supplying power to the external loads with high power consumption; illustratively, the vehicle control unit sorts the power consumption states of the loads according to the current amount information from high to low, and stops supplying power to the first or the first to the nth external loads in the sorting, wherein N is the total number of the external loads, so that the monitoring of the power consumption of the external loads and the reasonable distribution of the power consumption are realized.
Fig. 5 is a schematic diagram of an operating state of the vehicle intelligent power distribution management system 50 according to this embodiment. Referring to fig. 5, the intelligent power distribution management system 50 for a vehicle includes five operating states, specifically, a system initialization state, a power distribution starting state, a normal operating state, a fault handling state and a low power consumption operating state, wherein the fault handling state is divided into a fault level L state and a fault level H state.
Illustratively, when the key ignition signal of the entire vehicle is valid for the first time, the vehicle intelligent power distribution management system 50 starts initialization, the initialization process mainly includes software boot program start, chip initialization configuration and system self-check, and the system enters a power distribution start state only when the system initialization is successful and the self-check is passed. The distribution starting state is mainly a process from opening to closing of S1 and S2 in the power isolation unit 510, when RS1 overcurrent occurs three times in the closing process, the state of the system is switched to a fault level H state, otherwise, the state of the system is switched to a normal working state, wherein the number of times of RS1 overcurrent occurring in the closing process can be set according to an actual situation, and no specific limitation is made here. And F1 is a condition that the power distribution starting state jumps to the fault level H state, the condition is that RS1 overcurrent occurs for three times continuously, S1 and S2 are disconnected under the fault level H state, the fault level H flag bit is set and the fault timer starts to time, when the F2 condition is met, namely the fault timer is greater than Th (can be calibrated), the system jumps back to the power distribution starting state from the fault level H state, and meanwhile, the fault level H flag bit is cleared. And when the RS1 is over-current less than three times, the system jumps to a normal working state, S1 and S2 are closed in the normal working state, S3 is also switched from open to closed in the state, and when the F3 condition is met, namely the S1, S2 or S3 is over-current or over-temperature once, the system jumps to a fault level L state from the normal working state. And in the state of the fault level L, S1 and S2 are closed, S3 is opened, the flag bit of the fault level L is set, and the fault timer corresponding to S1 and S2 starts to time. And when the F4 condition is met, namely the S1, the S2 or the S3 is over-current or over-temperature disappears, the system jumps to a normal working state from a fault level L state, and meanwhile, the fault level L flag bit is cleared. And when the F5 condition is met, namely the timer corresponding to the overcurrent or overtemperature generated in S1 and S2 is greater than Ts (can be calibrated), the system jumps from the fault level L state to the fault level H state.
For example, when the key ignition signal is invalid, the system jumps from the normal operating state to the low power consumption operating state, and the system runs at low power consumption. When the key ignition signal is effective again, the system is directly jumped from the low-power consumption working state to the power distribution starting state, so that the system can enter the normal working state as soon as possible to realize the power supply of the power supply.
This embodiment provides an automobile-used intelligent power distribution management system, includes: power isolation unit, the control unit and intelligent power distribution unit, first power supply and non-safety related load are connected to the first end of power isolation unit, the second end of power isolation unit is connected intelligent power distribution unit and second power supply, intelligent power distribution unit is connected with the power supply of safety related load, the control unit with power isolation unit with intelligent power distribution unit connects, is used for control power isolation unit communicates between with first end and the second end or breaks off, the control unit is used for when non-safety related load side appears the abnormal conditions, control power isolation unit breaks off between with first end and the second end to make second power supply independently supply power for safety related load, transmit first detection parameter to the control unit, intelligent power distribution unit with the control unit electricity is connected for detect the parameter with the second and transmit to the control unit, the control unit be used for the basis first detection parameter with the second detects the closed or the disconnection that the parameter controlled power isolation unit and intelligent power distribution unit respectively, wherein, intelligent power distribution unit is used for external load distribution. By controlling the on/off of the power supply isolation unit, redundant power supply isolation between the first power supply source supplying power to the non-safety related load and the second power supply source supplying power to the safety related load is controlled, the power supply failure of the non-safety related load is prevented from affecting the power supply of the safety related load, and the power supply safety of the safety related load is ensured.
Example two
Fig. 6 is a diagram illustrating an intelligent power distribution management method for a vehicle according to a second embodiment of the present invention. Referring to fig. 6, the method includes:
s110, respectively connecting a first power supply and a second power supply to a power supply isolation unit 510;
s120, acquiring a first detection parameter and a second detection parameter through the power isolation unit 510, and sending the first detection parameter and the second detection parameter to the control unit 530;
specifically, the first detection parameter refers to a parameter obtained by detecting relevant data of the power isolation unit 510, and may be a plurality of parameters, for example: the current flowing through the power isolation unit 510 and the temperature of some components in the power isolation unit 510 transmit the plurality of first control parameters to the control unit 530 through a plurality of channels, respectively.
S130, the control unit 530 controls the power isolation unit 510 and the intelligent power distribution unit 520 to be turned on or off according to the first detection parameter and the second detection parameter.
Illustratively, the power isolation unit 510 is controlled to be turned on or turned off according to whether the first detection parameter is greater than a preset threshold value, or the intelligent power distribution unit 520 is controlled to be turned on or turned off according to whether the second detection parameter is greater than a preset threshold value, so that whether the power isolation unit 510 and the intelligent power distribution unit 520 are abnormal or not can be found in time, corresponding operations are performed, and the operation safety of the power isolation unit 510 and the intelligent power distribution unit 520 is improved.
Optionally, the first end of the intelligent power distribution unit 520 is connected to the second end of the power isolation unit 510; the second power supply and the safety-related load 60 are connected to a second terminal of the power isolation unit 510. The first detection parameter includes: a first current-related parameter and a first temperature-related parameter; the second detection parameter includes: a second current-related parameter and a second temperature-related parameter.
The embodiment provides an intelligent power distribution management method for a vehicle, which comprises the following steps: the power isolation unit is used for respectively connecting a first power supply source and a second power supply source to the power isolation unit, acquiring a first detection parameter and a second detection parameter through the power isolation unit, sending the first detection parameter and the second detection parameter to the control unit, and controlling the power isolation unit and the intelligent power distribution unit to be closed or opened by the control unit according to the first detection parameter and the second detection parameter. The power isolation unit and the intelligent power distribution unit are controlled to be switched on or switched off according to the first detection parameter and the second detection parameter, so that redundant power supply isolation between a first power supply for supplying power to non-safety related loads and a second power supply for supplying power to safety related loads is controlled, the power supply failure of the non-safety related loads is prevented from influencing the power supply of the safety related loads, and the power supply safety of the safety related loads is ensured.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. An automotive intelligent power distribution management system, comprising: the power supply isolation unit, the control unit and the intelligent power distribution unit are arranged on the power supply;
the first end of the power isolation unit is connected with a first power supply and a non-safety related load, the second end of the power isolation unit is connected with the intelligent power distribution unit and a second power supply, and the intelligent power distribution unit is in power supply connection with a safety related load; the control unit is connected with the power isolation unit and the intelligent power distribution unit and is used for controlling the power isolation unit to connect or disconnect the first end and the second end; the control unit is used for controlling the power isolation unit to disconnect the first end and the second end when the non-safety related load side has an abnormal condition, so that the second power supply source independently supplies power for the safety related load;
transmitting the first detection parameter to the control unit; the intelligent power distribution unit is electrically connected with the control unit and is used for transmitting the second detection parameter to the control unit;
the control unit is used for controlling the power isolation unit and the intelligent power distribution unit to be switched on or switched off respectively according to the first detection parameter and the second detection parameter;
wherein, the intelligent power distribution unit is used for external load power distribution.
2. The intelligent power distribution management system for vehicles of claim 1,
the first power supply comprises a high-voltage power battery, the second power supply comprises a low-voltage storage battery, and the high-voltage power battery is connected with the first end of the power isolation unit;
the first end of the intelligent power distribution unit is connected with the second end of the power isolation unit and the second power supply source, and the second end of the intelligent power distribution unit is connected with the safety-related load.
3. The vehicular intelligent power distribution management system according to claim 1, wherein a first end of the intelligent power distribution unit is connected to a second end of the power isolation unit;
the second power supply is connected with the second end of the power isolation unit;
the safety-related load is connected with the second end of the intelligent power distribution unit;
the first detection parameter includes: a first current-related parameter and a first temperature-related parameter; the second detection parameter includes: a second current-related parameter and a second temperature-related parameter.
4. The vehicular intelligent power distribution management system according to claim 1, wherein the power isolation unit comprises: the temperature sensor comprises a first switch, a second switch, a first sampling resistor, a first temperature sensor and a first driving chip; the first switch, the second switch and the first adoption resistor are connected in series between the first end and the second end of the power isolation unit;
the first driving chip is used for controlling the on and off of the first switch and the second switch.
5. The intelligent power distribution management system for the vehicle according to claim 4, wherein the first sampling resistor converts a current flowing through the first switch and the second switch into a first voltage signal;
the first driving chip differentially samples and amplifies the first voltage signal to obtain a first current related parameter, and the first current related parameter is sent to a control unit;
if the first current-related parameter is greater than a first current threshold, the control unit controls the first driving chip to disconnect the first switch and the second switch;
if the first current-related parameter is less than or equal to the first current threshold, the control unit controls the first driving chip to close the first switch and the second switch.
6. The vehicular intelligent power distribution management system according to claim 4, wherein the first temperature sensor is configured to measure the first temperature-related parameter of the first switch and the second switch, and send the first temperature-related parameter to the control unit through the first driving chip;
if the first temperature-related parameter is greater than a first temperature threshold, the control unit controls the first driving chip to disconnect the first switch and the second switch;
if the first temperature-related parameter is less than or equal to the first temperature threshold, the control unit controls the first charging unit to close the first switch and the second switch.
7. The intelligent power distribution management method for the vehicle according to claim 1, wherein the intelligent power distribution unit further comprises a third switch, a second sampling resistor, a second temperature sensor and a second driving chip.
8. The intelligent power distribution management method for the vehicle of claim 7, wherein the second sampling resistor converts the current flowing through the third switch into a second voltage signal;
the second driving chip differentially samples and amplifies the second voltage signal to obtain a second current related parameter, and the second current related parameter is sent to a control unit;
if the second current-related parameter is greater than a second current threshold, the control unit controls the second driving chip to disconnect the third switch;
if the second current-related parameter is less than or equal to the second current threshold, the control unit controls the second driving chip to close the third switch.
9. The vehicular intelligent power distribution management system according to claim 7, wherein the second temperature sensor is configured to measure the second temperature-related parameter of the third switch, and send the second temperature-related parameter to the control unit through the second driving chip;
if the second temperature-related parameter is greater than a second temperature threshold, the control unit controls the second driving chip to disconnect the third switch;
if the second temperature-related parameter is less than or equal to the second temperature threshold, the control unit controls the second driving chip to close the third switch.
10. The vehicle intelligent power distribution management system of claim 1, wherein the control unit is further configured to collect current of the intelligent power distribution unit and perform integration in time for estimating a power utilization state of the load.
11. An intelligent power distribution management method for a vehicle is characterized by comprising the following steps:
connecting a first end of a power isolation unit with a first power supply and a non-safety related load, connecting a second end of the power isolation unit with an intelligent power distribution unit and a second power supply, and connecting the intelligent power distribution unit with a safety related load in a power supply manner; the control unit is connected with the power isolation unit and the intelligent power distribution unit and controls the power isolation unit to connect or disconnect the first end and the second end; when the abnormal condition occurs at the non-safety related load side, the control unit controls the power isolation unit to disconnect the first end and the second end so that the second power supply source independently supplies power for the safety related load;
transmitting the first detection parameter to a control unit; the intelligent power distribution unit is electrically connected with the control unit, and second detection parameters are transmitted to the control unit;
the control unit respectively controls the power isolation unit and the intelligent power distribution unit to be switched on or switched off according to the first detection parameter and the second detection parameter;
wherein, the intelligent power distribution unit is used for external load power distribution.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115635851A (en) * | 2022-10-31 | 2023-01-24 | 重庆长安新能源汽车科技有限公司 | Vehicle-mounted intelligent power distribution system, control method and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115635851A (en) * | 2022-10-31 | 2023-01-24 | 重庆长安新能源汽车科技有限公司 | Vehicle-mounted intelligent power distribution system, control method and storage medium |
| CN115635851B (en) * | 2022-10-31 | 2024-06-04 | 深蓝汽车科技有限公司 | Vehicle-mounted intelligent power distribution system, control method and storage medium |
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