CN110103855B - Power distribution system and method for hybrid vehicle - Google Patents
Power distribution system and method for hybrid vehicle Download PDFInfo
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- CN110103855B CN110103855B CN201910312587.2A CN201910312587A CN110103855B CN 110103855 B CN110103855 B CN 110103855B CN 201910312587 A CN201910312587 A CN 201910312587A CN 110103855 B CN110103855 B CN 110103855B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
Abstract
The invention relates to the technical field of hybrid vehicles, in particular to a power distribution system and a power distribution method of a hybrid vehicle. The system comprises a controller, an isolating switch and a power distribution control module, wherein the isolating switch and the power distribution control module are connected with the controller; the high-voltage power supply distribution module is connected with the first wiring contact of the isolating switch; the low-voltage power supply is connected with the second wiring contact of the isolating switch; the high-voltage power supply distribution module is used for being connected with a starter of a hybrid vehicle through the isolating switch so as to supply power to the starter; the low-voltage power supply is used for supplying power to the starter connected with the low-voltage power supply in series; the power distribution control module is used for acquiring working condition information of the hybrid vehicle and controlling the on-off of the isolating switch based on the working condition information. The invention ensures the voltage stability of the whole vehicle through reasonable power distribution, prevents the faults of instrument black screen or engine flameout and the like caused by insufficient power or starting voltage drop, and can improve the running stability of the hybrid vehicle.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a power distribution system and a power distribution method of a hybrid vehicle.
Background
With the stricter and stricter environmental protection measures in various countries in the world, hybrid vehicles become one of the key points of research and development of various automobile factories due to the characteristics of energy conservation, low emission and the like. Unlike the transmission automobile model, the hybrid automobile generally has two sets of power supply devices, namely a high-voltage power supply and a low-voltage power supply. Therefore, the power distribution system needs to reasonably distribute power according to the running state of the vehicle and the electric quantity reserve of the power supply, and is compatible with the high-voltage power supply to charge the low-voltage power supply so as to meet the requirements of different running modes and endurance of the power system.
The power system start of the hybrid vehicle comprises pure electric start (a high-voltage power supply drives a motor and a gearbox) and starter start (consistent with the traditional vehicle type). Under some special working conditions, such as during a vehicle jam, the peak power of a high-voltage power supply is insufficient, and the like, the starter needs to be frequently used for starting, so that the electric quantity (SOC) of the power supply is rapidly reduced, the voltage of a starting loop of the starter and the voltage of a whole vehicle loop are too low, and further, part of electric equipment involved in starting, such as an Electronic Control Unit (ECU), cannot normally work, and the problems of instrument black screen, fault report, abnormal starting and the like occur.
Therefore, a power distribution system capable of reasonably distributing power and ensuring the voltage stability of the whole vehicle needs to be designed to avoid the problems and improve the running stability of the hybrid vehicle.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a power distribution system and method for a hybrid vehicle, and the specific technical solution of the present invention is as follows:
in a first aspect, a power distribution system of a hybrid vehicle is provided, which comprises a controller, an isolating switch and a power distribution control module, wherein the isolating switch and the power distribution control module are connected with the controller; the high-voltage power supply distribution module is connected with the first wiring contact of the isolating switch; the low-voltage power supply is connected with the second wiring contact of the isolating switch; the high-voltage power supply distribution module is used for being connected with a starter of a hybrid vehicle through the isolating switch so as to supply power to the starter; the low-voltage power supply is used for supplying power to the starter connected with the low-voltage power supply in series; the power distribution control module is used for acquiring working condition information of the hybrid vehicle and controlling the on-off of the isolating switch based on the working condition information.
In a second aspect, a power distribution method for a hybrid vehicle is provided, including: the power distribution control module acquires working condition information of the hybrid vehicle; and the power distribution control module controls the on-off of the isolating switch based on the working condition information so as to enable the high-voltage power supply power distribution module and/or the low-voltage power supply to supply power to a starter of the hybrid vehicle.
In a third aspect, a hybrid vehicle is provided that includes the above power distribution system and power distribution method.
By adopting the technical scheme, the power distribution system and the method of the hybrid vehicle provided by the invention have the following beneficial effects:
the power distribution system of the hybrid vehicle is communicated with or isolates the engine starting loop and the whole vehicle loop through the isolating switch, so that sudden voltage drop or voltage fluctuation of the whole vehicle loop caused by starting of the starter can be prevented; the power distribution control module reasonably distributes power according to the working condition information of the hybrid vehicle, ensures the voltage stability of the whole vehicle, prevents the problems of instrument black screen, fault misinformation, engine flameout and the like caused by insufficient power or starting voltage drop, and improves the running stability of the hybrid vehicle.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a hybrid vehicle power distribution system according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a power distribution system of a hybrid vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a main power fuse box of a hybrid vehicle based power distribution system in accordance with an embodiment of the present invention;
in the figure: 100-controller, 210-power distribution control module, 220-disconnector, 221-first wiring contact, 222-second wiring contact, 223-first control circuit wiring pin, 224-second control circuit wiring pin, 225-closing contact, 226-isolating contact, 230-high voltage power distribution module, 231-high voltage power supply, 232-voltage converter, 240-low voltage power supply, 241-low voltage power supply wiring harness terminal, 250-starter wiring harness terminal, 261-steering motor wiring harness terminal, 262-front compartment distributor wiring harness terminal, 271-first fuse, 272-second fuse, 280-base, 291-first bus bar, 292-second bus bar, 293-third bus bar, 300-starter, 400-front compartment distributor, 500-electric power steering motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a hybrid vehicle power distribution system according to an embodiment of the present invention, as shown in fig. 1, the system may at least include a controller 100, a power distribution control module 210 connected to the controller 100, and an isolation switch 220; a high voltage power distribution module 230 connected to a first wiring contact 221 of the isolating switch 220; a low voltage power supply 240 connected to the second wiring contact 222 of the isolation switch 220.
Specifically, the high-voltage power distribution module 230 is configured to be connected to a starter 300 of a hybrid vehicle through the isolation switch 220 to supply power to the starter 300; the low-voltage power supply 240 is used for supplying power to the starter 300 connected in series with the low-voltage power supply; the power distribution control module 210 is configured to obtain operating condition information of the hybrid vehicle, and control the isolation switch 220 to be switched on and off based on the operating condition information.
Specifically, the controller 100 may be integrated into a Vehicle Control Unit (VCU) of the hybrid vehicle, or may be a device separately installed in the hybrid vehicle. The power distribution control module 210 may be integrated into the controller 100 or may be a device separate from the controller 100.
The controller 100 and the power distribution control module 210 may be implemented by hardware, software, firmware, or a combination thereof. In the embodiment of the present invention, the controller 100 and the power distribution control module 210 may be implemented by one Electronic Control Unit (ECU) including hardware components and software components. As known to those skilled in the art, an electronic control unit is any electronic control system used in vehicles to control various vehicle subsystems such as the engine, motors, transmission, brakes, body, etc. An ECU typically includes an input interface circuit, a processor and associated circuitry or chips (e.g., memory, etc.), and an output interface circuit.
The input interface circuit is used for receiving signals which are collected by a sensor or other devices and related to the running states of vehicle subsystems such as an engine and power supply equipment, filtering, amplifying, performing analog-digital conversion and the like on the signals, and then transmitting the signals to the processor. The processor has stored in its associated memory a software program for controlling its operation so that input signals from the input interface circuits can be correspondingly computed and processed to generate control signals for the respective actuators of the various vehicle subsystems. The processor may be any device having calculation and control functions, such as a Microprocessor (MPU), a microcontroller 100 (MCU), and the like. The output interface circuit is used to transmit control signals (e.g., after amplification) from the processor to the respective actuator to effect control of the respective vehicle subsystem.
Further, the isolating switch 220 includes a relay, and the relay is provided with a control circuit pin, and the control circuit pin is connected with the power distribution control module 210. The power distribution control module 210 sends a switch instruction to the isolating switch 220 through the control circuit pin to control the opening and closing of the isolating switch 220.
Specifically, the high voltage power distribution module 230 may include a high voltage power supply 231 and a voltage converter (DCDC) 232; the high-voltage end of the voltage converter 232 is connected to the output end of the high-voltage power supply 231, so that the output voltage of the high-voltage power supply 231 is converted to charge the low-voltage power supply 240; the low voltage terminal of the voltage converter 232 is connected to the first connection contact 221, and the disconnecting switch 220 can block the connection between the low voltage power supply 240 and the high voltage power supply 231.
Specifically, the isolating switch 220 may include a control circuit and a controlled circuit connected to each other, a switch element is disposed in the controlled circuit, and the first connection contact 221 and the second connection contact are disposed at two ends of the switch element; the control circuit may include a control circuit pin and a switching control element, the switching control element being connected to the switching element; the control circuit is connected with the power distribution control module 210 through a control circuit pin, and the switching elements in the controlled circuit are controlled to be switched off or switched off by receiving a switching instruction of the power distribution control module 210.
Specifically, the input variable of the switch command to the isolating switch 220 may be voltage, current, power, impedance, frequency, temperature, pressure, light, or the like, and the signal type of the input variable is not limited in this specification.
In practical applications, the isolating switch 220 may be a normally closed isolating switch 220, that is, the switching element is normally closed; the isolation switch 220 may also be a normally open isolation switch 220, i.e. the switching element is normally open.
Further, the system further comprises: a starter harness terminal 250 and a vehicle circuit connection unit; the starter harness terminal 250 is respectively connected with the second wiring contact 222 and the output end of the low-voltage power supply 240; the whole vehicle loop connection unit is respectively connected with the output end of the high-voltage power distribution module 230 and the first connection contact 221.
Specifically, the starter harness terminal 250 may connect electrical components associated with a starter 300 of a hybrid vehicle; the low voltage power source 240 and the high voltage power distribution module may supply power to the starter 300 of the hybrid vehicle through the starter harness terminal 250 to start the engine of the hybrid vehicle.
Specifically, the whole vehicle circuit connection unit may be connected to an electrical element unrelated to engine starting; such as a vehicle control unit, an in-vehicle electrical appliance, an electrical element for controlling the turning or braking of a hybrid vehicle, etc.
Furthermore, the system further comprises a fuse for protecting the high voltage power supply 231, the low voltage power supply 240 and the electrical elements of the vehicle, one end of the fuse is connected with the first wiring contact 221, and the other end of the fuse is connected with the high voltage power supply 231 module and/or the whole vehicle circuit connection unit.
Specifically, when the isolating switch 220 is in a closed state, and after the pure electric mode of the hybrid electric vehicle is started, the high-voltage power distribution module 230 supplies power to the whole vehicle loop. Meanwhile, when the controller 100 sends a command to enter the hybrid operation mode, the high voltage power distribution module 230 can also supply power to the starter 300 to start the engine, so that the vehicle enters the hybrid operation mode.
Specifically, when the operating condition information of the hybrid vehicle acquired by the power distribution control module 210 meets the fuel mode starting operating condition, the controller 100 sends a fuel mode starting instruction, and the power distribution control module 210 outputs a turn-off instruction to the isolating switch 220 in response to the fuel mode starting instruction. At this time, the low voltage power supply 240 and the starter harness terminal 250 are respectively isolated from the high voltage power supply distribution module 230, the low voltage power supply 240 only supplies power to the starter 300 to start the engine and enter a fuel oil running mode, and the low voltage power supply 240 and the starter harness terminal 250 are connected in series to form an engine starting loop; the high voltage power supply 231 provides power only to the vehicle circuit through the DCDC to distribute power for operation of other electrical components of the vehicle.
The working condition information corresponding to the fuel mode starting working condition at least comprises one of the following working conditions: the electric quantity of the high-voltage power supply 231 is lower than a first preset electric quantity threshold value, the electric quantity of the high-voltage power supply 231 is lower than a second preset electric quantity threshold value, and the time interval of the starting request is smaller than a preset time threshold value, the peak power of the high-voltage power supply 231 is insufficient, the motor is not activated in theft prevention, the motor is failed, and/or the current vehicle speed is smaller than a preset vehicle speed threshold value.
The hybrid vehicle power distribution system of the invention communicates or isolates the engine starting loop and the whole vehicle loop through the isolating switch 220, and can prevent sudden voltage drop or voltage fluctuation of the whole vehicle loop caused by starting the starter 300; the power distribution control module 210 reasonably distributes power according to the working condition information of the hybrid vehicle, ensures the voltage stability of the whole vehicle, prevents the instrument fault and false alarm caused by insufficient power or starting voltage drop, and improves the running stability of the hybrid vehicle.
In an embodiment, please refer to fig. 2, fig. 2 is a schematic circuit connection diagram of a hybrid vehicle power distribution system according to an embodiment of the present invention.
Specifically, in the present embodiment, the low voltage power supply 240 in the power distribution system is a 12V battery, the high voltage power supply 231 is a 48V power battery, the isolating switch 220 is a normally closed relay, the starter harness terminal 250 is connected to the starter 300 of the hybrid vehicle, and the vehicle loop connection unit includes a steering motor harness terminal 261 and a front cabin distributor 400 harness terminal 262 which are connected in parallel. The steering motor harness terminal 261 is connected to an electric power steering motor 500 of the hybrid vehicle for supplying power to a steering system of the hybrid vehicle, and the front compartment distributor 400 harness terminal 262 is connected to a front compartment distributor 400 of the hybrid vehicle for distributing power to other electrical components of the hybrid vehicle 400. In addition, the fuse in the power distribution system includes a first fuse 271 and a second fuse 272, the rated current of the first fuse 271 is 300A and is disposed between the high voltage power supply 231 and the isolating switch 220, and the rated current of the second fuse 272 is 80A and is disposed between the steering motor harness terminal 261 and the isolating switch 220.
Specifically, the controlled circuit of the isolating switch 220 in this embodiment includes a first wiring contact 221, a switching element and a second wiring contact 222 connected in sequence, where the switching element may be provided with a closing contact and an isolating contact; the control circuit of the isolating switch 220 includes a first control circuit pin, a switch control element and a second control circuit pin, which are connected in sequence, and the first control circuit pin and the second control circuit pin are respectively connected with the power distribution control module 210.
Further, when the isolating switch 220 is in a closed state, the closing contact of the switching element is in a connected state, and after the pure electric mode of the hybrid electric vehicle is started, the DCDC converts the output voltage of the high-voltage power supply 231 into 12V to supply power to the vehicle steering system, the front cabin distributor 400 and the low-voltage power supply 240; meanwhile, the high voltage power supply 231 can also supply power to the starter 300 through the DCDC to start the engine, so that the vehicle enters a hybrid operation mode.
Further, when the operating condition information of the hybrid vehicle acquired by the power distribution control module 210 meets the fuel mode starting operating condition, for example, the high-voltage power supply 231 is low in power and encounters a traffic jam, the power distribution control module 210 outputs a voltage difference to the switch control element to open the switch control element, so that the closed contact is opened and the isolation contact is closed. At this time, the engine start circuit is isolated from the vehicle circuit, the high voltage power supply 231 supplies power only to the steering system and the front compartment power distributor 400 through the DCDC, and the low voltage power supply 240 supplies power only to the starter 300.
In an embodiment, please refer to fig. 3, fig. 3 is a schematic structural diagram of a main power fuse box of a power distribution system based on the hybrid vehicle according to an embodiment of the present disclosure.
The main power fuse box includes a base 280, a plurality of busbars, an isolating switch 220, and a plurality of harness terminals; the isolating switch 220 and the busbar are arranged on the base 280, and the busbar 3 is connected with the isolating switch 2202; the base 280 is provided with a plurality of connectors, the harness terminals are correspondingly connected with the connectors one by one, and the plurality of harness terminals connected to the same base 280 have different structures; the isolating switch 220 is used for disconnecting the engine starting loop from the whole vehicle loop, and preventing the starting loop from pulling down the voltage of the whole vehicle loop to cause abnormal work of an electric appliance; meanwhile, the isolating switch 220 can also be compatible with the inverter current from the DCDC to charge the low-voltage power supply 240; the busbar and the wiring harness terminal are installed on the fuse box through the connector.
Further, the harness terminals include a low voltage power supply harness terminal 241, a starter harness terminal 250, a steering motor harness terminal 261, and a front compartment distributor 400 harness terminal 262, which are different from each other in structure.
Further, the main power fuse box further includes a first fuse 271, a second fuse 272 and a DCDC,
the first fuse 271 is a 300A fuse and the second fuse 272 is an 80A fuse.
Preferably, the first connection contacts 221, 80A fuses and 300A fuses of the isolating switch 220 are connected through a first busbar 291; the second wiring contact 222 of the isolating switch 220, the low-voltage power wiring harness terminal 241 and the starter wiring harness terminal 250 are connected through a second busbar 292; the wiring harness terminals 262 and 300A fuses of the front cabin distributor 400 are connected with the output end of the DCDC through the third busbar 293; the first busbar 291, the second busbar 292 and the third busbar 293 are made of conductive materials, and the first busbar 291, the second busbar 292 and the third busbar 293 are used as wires.
Because the base 280 is provided with the limiting grooves matched with the shapes of the wiring harness terminals, when any two or more wiring harness terminals are installed in error, the wiring harness terminals conflict with the limiting grooves unmatched with the wiring harness terminals, so that technicians can find errors and make adjustments in time, and the accuracy and efficiency can be improved during assembly, replacement or detection of the automobile main power supply fuse box.
A method of power distribution for a hybrid vehicle of the present specification is described below based on the power distribution system described above, which provides the method steps as described in the examples or flowcharts, but may include more or fewer steps based on routine or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. In actual system execution, the methods shown in the embodiments or the figures can be executed in sequence or in parallel. The method may include:
s100: the power distribution control module 210 acquires the working condition information of the hybrid vehicle;
s200: the power distribution control module 210 controls the isolation switch 220 to be opened or closed based on the operating condition information, so that the high-voltage power distribution module 230 and/or the low-voltage power supply 240 supply power to the starter 300 of the hybrid vehicle.
In this embodiment, the power distribution control module 210 sends a switch instruction to the isolating switch 220 based on the operating condition information.
In the embodiment of the present disclosure, the power distribution control module 210 may be connected to the controller 100, and the power distribution control module 210 may obtain the operating condition information of the hybrid vehicle through the controller 100.
In the embodiment of the present specification, the starter 300 of the hybrid vehicle is an electrically driven type starter 300, and the starter 300 is used to provide a power source for engine starting.
Further, the S200 may include:
s210: the power distribution control module 210 judges whether the hybrid vehicle is in a fuel starting mode working condition based on the working condition information;
in this embodiment of the present specification, the operating condition information corresponding to the operating condition of the fuel starting mode may include at least one of: the electric quantity of the high-voltage power supply 231 is lower than a first preset electric quantity threshold value, the electric quantity of the high-voltage power supply 231 is lower than a second preset electric quantity threshold value, and the time interval of the starting request is smaller than a preset time threshold value, the peak power of the high-voltage power supply 231 is insufficient, the motor is not activated in theft prevention, the motor is failed, and/or the current vehicle speed is smaller than a preset vehicle speed threshold value.
In some embodiments, the first preset electric quantity threshold is lower than the second preset electric quantity threshold, and the second preset electric quantity threshold may be 20% of the remaining electric quantity.
In some embodiments, the preset time threshold may be 120 s.
In some embodiments, the insufficient peak power of the high voltage power supply 231 may be that the peak power of the high voltage power supply 231 is lower than 7 KW.
In some embodiments, the preset vehicle speed threshold may be 15 Km/h.
S220: when the judgment result is yes, the power distribution control module 210 controls the disconnecting switch 220 to be disconnected, so that the low-voltage power supply 240 supplies power to the starter 300;
s230: when the judgment result is yes, the power distribution control module 210 controls the disconnecting switch 220 to be disconnected, so that the high-voltage power distribution module 230 supplies power to the whole vehicle loop of the hybrid vehicle.
S240: if the determination result is negative, the power distribution control module 210 controls the isolation switch 220 to be closed, so that the high-voltage power distribution module 230 and/or the low-voltage power supply 240 supplies power to the starter 300.
S250: when the judgment result is negative, the power distribution control module 210 controls the isolation switch 220 to be closed, so that the high-voltage power supply power distribution module 230 and/or the low-voltage power supply 240 supply power to the whole vehicle loop of the hybrid vehicle.
S260: when the determination result is negative, the power distribution control module 210 controls the isolation switch 220 to be closed, so that the high-voltage power supply 231 supplies power to the low-voltage power supply 240.
In practical application, a power system of a part of hybrid vehicles has an idling automatic start-stop function, namely, after the vehicle is braked and stopped, an engine and/or a driving motor can be automatically turned off, and when an accelerator pedal is operated, an ignition switch automatically sends out a starting signal to control the engine and/or the driving motor to be turned on. When the vehicle is in a traffic jam in the running process, the vehicle needs to be started and stopped frequently, if the electric quantity of the high-voltage power supply 231 is insufficient, the vehicle cannot be started in a pure electric mode, the starter 300 needs to intervene to work to start the engine, and the vehicle enters a fuel starting mode. Because the starter 300 consumes a certain amount of electric power (SOC) when working, the frequent working of the starter 300 within a period of time can cause the SOC of the high-voltage power supply 231 or the low-voltage power supply 240 to drop sharply, at this time, the voltage of the starting loop of the starter 300 is very low, and the voltage of the loop of the whole vehicle is pulled down, so that some electric appliances participating in the starting, such as VCUs, can not work normally, and the problems of meter reporting faults and the like occur. The power distribution control module 210 controls the isolating switch 220 to be switched off, when the starter 300 is started, only the electric quantity is drawn from the low-voltage power supply 240, and the electric quantity is drawn from the high-voltage power supply 231 of the whole vehicle loop, so that the problems are effectively avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A power distribution system for a hybrid vehicle, comprising a controller (100), an isolation switch (220) and a power distribution control module (210) connected to the controller (100);
a high voltage power distribution module (230) connected to a first wiring contact (221) of the disconnector (220);
a low voltage power supply (240) connected to a second wiring contact (222) of the disconnector (220);
the high-voltage power supply distribution module (230) is used for being connected with a starter (300) of a hybrid vehicle through the isolating switch (220) so as to supply power to the starter (300);
the low-voltage power supply (240) is used for supplying power to the starter (300) connected with the low-voltage power supply in series;
the power distribution control module (210) is used for acquiring working condition information of the hybrid vehicle and controlling the on-off of the isolating switch (220) based on the working condition information;
wherein the power distribution control module (210) is used for controlling the on-off of the isolating switch (220) based on the working condition information and comprises the following steps: the power distribution control module (210) is used for judging whether the hybrid vehicle is in a fuel starting mode working condition or not based on the working condition information, and when the judgment result is yes, the power distribution control module (210) is used for controlling the disconnecting switch (220) to be disconnected so that the low-voltage power supply (240) supplies power to the starter (300); when the judgment result is negative, the power distribution control module (210) is used for controlling the disconnecting switch (220) to be closed;
when the isolating switch (220) is in a closed state, and after the pure electric mode of the hybrid electric vehicle is started, the high-voltage power supply distribution module (230) is used for supplying power to a whole vehicle loop; meanwhile, when the controller (100) sends a command of entering a hybrid operation mode, the power distribution control module (210) is used for controlling the high-voltage power supply power distribution module (230) to supply power to the starter (300) so as to start the engine and enable the vehicle to enter the hybrid operation mode;
the working condition information corresponding to the working condition of the fuel starting mode at least comprises one of the following: the electric quantity of the high-voltage power supply (231) is lower than a first preset electric quantity threshold value, the electric quantity of the high-voltage power supply (231) is lower than a second preset electric quantity threshold value, the time interval of the starting request is smaller than a preset time threshold value, the peak power of the high-voltage power supply (231) is insufficient, the motor is not activated in an anti-theft mode, the motor is failed, and/or the current vehicle speed is smaller than a preset vehicle speed threshold value.
2. The system of claim 1, wherein the isolation switch (220) comprises a relay, the isolation switch (220) relay being provided with a control circuit pin, the control circuit pin being connected with the power distribution control module (210).
3. The system of claim 1, further comprising a starter harness terminal (250) and a vehicle circuit connection unit;
the starter harness terminal (250) is respectively connected with the second wiring contact (222) and the output end of the low-voltage power supply (240); and the whole vehicle loop connecting unit is respectively connected with the output end of the high-voltage power supply distribution module (230) and the first wiring contact (221).
4. A system according to claim 3, characterized in that the system further comprises a fuse, one end of which is connected with the first wiring contact (221), the other end of which is connected with the high voltage power supply (231) module and/or the vehicle circuit connection unit.
5. A method of power distribution for a hybrid vehicle, comprising:
the power distribution control module (210) acquires the working condition information of the hybrid vehicle;
the power distribution control module (210) controls the on-off of the isolating switch (220) based on the working condition information so that the high-voltage power supply power distribution module (230) and/or the low-voltage power supply (240) can supply power to a starter (300) of the hybrid vehicle;
wherein the power distribution control module (210) controls the on/off of the isolating switch (220) based on the operating condition information comprises: whether the hybrid vehicle is in a fuel starting mode working condition is judged based on the working condition information, and when the judgment result is yes, the power distribution control module (210) controls the disconnecting switch (220) to be disconnected so that the low-voltage power supply (240) supplies power to the starter (300); when the judgment result is negative, the power distribution control module (210) controls the isolating switch (220) to be closed;
when the isolating switch (220) is in a closed state, after the pure electric mode of the hybrid electric vehicle is started, the high-voltage power supply distribution module (230) supplies power to a whole vehicle loop; meanwhile, when the controller (100) sends a command of entering a hybrid operation mode, the power distribution control module (210) controls the high-voltage power distribution module (230) to supply power to the starter (300) so as to start the engine and enable the vehicle to enter the hybrid operation mode;
the working condition information corresponding to the working condition of the fuel starting mode at least comprises one of the following: the electric quantity of the high-voltage power supply (231) is lower than a first preset electric quantity threshold value, the electric quantity of the high-voltage power supply (231) is lower than a second preset electric quantity threshold value, the time interval of the starting request is smaller than a preset time threshold value, the peak power of the high-voltage power supply (231) is insufficient, the motor is not activated in an anti-theft mode, the motor is failed, and/or the current vehicle speed is smaller than a preset vehicle speed threshold value.
6. The method of claim 5, further comprising:
and when the judgment result is yes, the power distribution control module (210) controls the isolating switch (220) to be disconnected so that the high-voltage power supply power distribution module (230) supplies power to the whole vehicle loop of the hybrid vehicle.
7. The method of claim 6, further comprising:
if the judgment result is negative, the power distribution control module (210) controls the isolating switch (220) to be closed, so that the high-voltage power supply power distribution module (230) and/or the low-voltage power supply (240) supply power to the starter (300).
8. The method of claim 5 or 7, further comprising:
and when the judgment result is negative, the power distribution control module (210) controls the isolating switch (220) to be closed, so that the high-voltage power supply power distribution module (230) and/or the low-voltage power supply (240) supply power to the whole vehicle loop of the hybrid vehicle.
9. The method of claim 5 or 7, further comprising:
when the judgment result is negative, the power distribution control module (210) controls the isolating switch (220) to be closed so that the high-voltage power supply (231) supplies power to the low-voltage power supply (240).
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| CN110641399A (en) * | 2019-10-14 | 2020-01-03 | 广州创锐车用电器有限公司 | Power management circuit, method and motor vehicle with power management circuit |
| CN111002827B (en) * | 2019-12-30 | 2021-07-23 | 深圳一清创新科技有限公司 | Unmanned vehicle power supply system and control method thereof |
| CN111478385A (en) * | 2020-03-23 | 2020-07-31 | 义乌吉利动力总成有限公司 | Vehicle low-voltage protection control method, device and system and computer storage medium |
| CN112248952B (en) * | 2020-10-29 | 2022-05-03 | 东风商用车有限公司 | Auxiliary control method and system for double-system starting electric energy of 48V hybrid commercial vehicle |
| CN112721836B (en) * | 2021-01-25 | 2022-12-09 | 中国重汽集团济南动力有限公司 | Power distribution system and method for multi-shaft hybrid power vehicle |
| CN114407654A (en) * | 2022-01-28 | 2022-04-29 | 神龙汽车有限公司 | PHEV (hybrid electric vehicle) low-voltage power supply system and control method |
| CN115891649A (en) * | 2022-11-17 | 2023-04-04 | 智己汽车科技有限公司 | Integrated control device, electric vehicle and power supply management method |
| CN117207949B (en) * | 2023-10-10 | 2024-04-02 | 潍坊佩特来电器有限公司 | Power generation control device and method for generator of hybrid vehicle and voltage regulator |
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| US8314578B2 (en) * | 2009-03-09 | 2012-11-20 | GM Global Technology Operations LLC | Control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery |
| CN204264073U (en) * | 2014-11-03 | 2015-04-15 | 中国第一汽车股份有限公司 | The power-supply system of the anti-Voltage Drop of a kind of hybrid electric vehicle |
| CN106184198B (en) * | 2016-07-11 | 2018-09-11 | 中国第一汽车股份有限公司 | A kind of failure limping control method and device for hybrid vehicle |
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