CN116901733A - Range extender system power control device and method - Google Patents

Range extender system power control device and method Download PDF

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Publication number
CN116901733A
CN116901733A CN202311113078.XA CN202311113078A CN116901733A CN 116901733 A CN116901733 A CN 116901733A CN 202311113078 A CN202311113078 A CN 202311113078A CN 116901733 A CN116901733 A CN 116901733A
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CN
China
Prior art keywords
resistor
voltage
controller
range extender
diode
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Application number
CN202311113078.XA
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Chinese (zh)
Inventor
陆斌
黄星光
沈慧芳
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New United Group Co Ltd
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New United Group Co Ltd
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Priority to CN202311113078.XA priority Critical patent/CN116901733A/en
Publication of CN116901733A publication Critical patent/CN116901733A/en
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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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The application discloses a range extender system power control device and a method; the controller receives the output signal of the voltage comparison output circuit, judges the current battery voltage state according to the current voltage comparison output circuit, adjusts the power generation of the range extender and the power consumption of the driving system based on the current under-voltage level, adjusts the voltage node to a larger voltage if the under-voltage value is smaller, and corresponds to the larger power generation and smaller required power. The problem that the generated power and the used power are not matched due to the fact that a single undervoltage point starts the range extender system to work and the generated power is output fixedly is solved.

Description

Range extender system power control device and method
Technical Field
The application relates to the field of engines, in particular to a range extender system power control device and method.
Background
The extended range wide vehicle is one with extended range and wide vehicle body design. Hybrid or electric-only power systems are commonly employed, which include a battery or fuel cell as the primary energy source to provide the driving force of the vehicle. In addition, it is equipped with a range extender system for charging or directly powering the battery pack to extend the range of the vehicle. When the battery voltage drops to a preset undervoltage point, the range extender system is started, the fuel engine or the fuel battery drives the generator to work, and the generator can convert mechanical energy into electric energy. These electric power may be supplied directly to the electric motor of the electric vehicle for driving or used to charge a battery pack.
Because the range extender system and the driving system are two sets of systems, in actual use, the power consumption of the vehicle may be lower than the power generation of the generator, which may result in surplus power generation, and a part of electric energy may not be fully utilized; conversely, the generator of the range extender system may not meet the maximum load demand of the vehicle, resulting in a mismatch between the generated and used power, resulting in a mismatch in the power of the system.
Therefore, how to solve the problem that the generated power and the used power are not matched due to the operation of the single under-voltage point start range extender system is a technical problem to be solved urgently by the person skilled in the art.
Disclosure of Invention
The application aims to provide a power control device and method for a range extender system, which solve the problem that generated power and used power are not matched due to the fact that the range extender system is started to work by a single under-voltage point.
In order to solve the above technical problems, the present application provides a power control device of a range extender system, including:
the device comprises a voltage sampling circuit, a plurality of voltage comparison output circuits and a controller;
the input end of the voltage sampling circuit is connected with the output end of the battery bus; the output ends of the voltage sampling circuits are respectively connected with a plurality of voltage comparison output circuits, and the output ends of the voltage comparison output circuits are connected with the controller; the controller is connected with the generator controller and the driving system controller.
Optionally, in the above range extender system power control device, the voltage comparison output circuit includes: the first resistor, the second resistor, the third resistor, the fourth resistor, the first capacitor, the first operational amplifier and the optocoupler;
the output end of the voltage sampling circuit is connected with the inverting input end of the first operational amplifier; the non-inverting input end of the first operational amplifier is connected with the first end of the first resistor, the first end of the second resistor and the first end of the third resistor; the second end of the first resistor is connected with a power supply, and the second end of the second resistor is grounded; the output end of the first operational amplifier is connected with the second end of the third resistor, the first end of the fourth resistor and the negative electrode of the optical coupler; the second end of the fourth resistor and the anode of the optocoupler are connected with a power supply; the collector of the optical coupler is connected with the emitter of the optical coupler through a first capacitor, the emitter of the optical coupler is grounded, and the collector of the optical coupler is used as the output end of the voltage comparison output circuit.
Optionally, in the above range extender system power control device, the voltage sampling circuit includes: a fifth resistor, a sixth resistor, a seventh resistor, and a second operational amplifier;
the first end of the battery bus is connected to the inverting input end of the second operational amplifier through a fifth resistor, the second end of the battery bus is connected to the non-inverting input end of the second operational amplifier through a sixth resistor, the inverting input end of the second operational amplifier is connected to the output end of the second operational amplifier through a seventh resistor, and the output end of the second operational amplifier serves as the output end of the voltage sampling circuit.
Optionally, in the above range extender system power control device, the voltage comparison output circuit further includes: an eighth resistor;
the positive pole of the optocoupler is connected with a power supply through an eighth resistor.
Optionally, in the above range extender system power control device, the voltage comparison output circuit further includes: a ninth resistor, a light emitting diode;
the collector of the optocoupler is connected with the cathode of the light emitting diode, the anode of the light emitting diode is connected with a power supply, and the ninth resistor is connected with the light emitting diode in parallel.
Optionally, in the above range extender system power control device, the voltage sampling circuit further includes: the second capacitor and the third capacitor;
the second capacitor is connected in parallel between the first end of the battery bus and the ground end, and the third capacitor is connected in parallel between the second end of the battery bus and the ground end.
Optionally, in the above range extender system power control device, the voltage sampling circuit further includes: a first diode, a second diode, a third diode, a fourth diode, and a tenth resistor;
the inverting input end of the second operational amplifier is connected with the anode of the first diode, the cathode of the second diode and the cathode of the third diode; the cathode of the first diode is grounded through a tenth resistor, the cathode of the second diode is connected with the non-inverting input end of the second operational amplifier, and the anode of the third diode is grounded; the non-inverting input end of the second operational amplifier is connected with the cathode of the fourth diode, and the anode of the fourth diode is grounded.
Optionally, in the above range extender system power control device, the device further includes: a memory;
the memory is connected with the controller.
In order to solve the technical problem, the application also provides a power control method of the range extender system, which is applied to a power control device of the range extender system and comprises the following steps: the device comprises a voltage sampling circuit, a plurality of voltage comparison output circuits and a controller; the input end of the voltage sampling circuit is connected with the output end of the battery bus; the output ends of the voltage sampling circuits are respectively connected with a plurality of voltage comparison output circuits, and the output ends of the voltage comparison output circuits are connected with the controller; the controller is connected with the generator controller and the driving system controller;
the method comprises the following steps:
receiving an undervoltage signal of the voltage comparison output circuit;
and adjusting the generator controller and the driving system controller according to the undervoltage level corresponding to the current voltage comparison output circuit.
Optionally, in the above method for controlling power of a range extender system, adjusting a generator controller and a driving system controller according to an under-voltage level corresponding to a current voltage comparison output circuit includes:
determining the undervoltage level corresponding to the current voltage comparison output circuit;
selecting a corresponding generation power level and a power consumption power reduction level according to the undervoltage level;
adjusting the generator controller according to the generated power level, and adjusting the driving system controller according to the used power reduction level;
the higher the voltage corresponding to the undervoltage level is, the smaller the generated power corresponding to the generated power level is, and the smaller the electric power reduction amplitude corresponding to the electric power reduction level is.
The application provides a power control device of a range extender system, which comprises: the device comprises a voltage sampling circuit, a plurality of voltage comparison output circuits and a controller; the input end of the voltage sampling circuit is connected with the output end of the battery bus; the output ends of the voltage sampling circuits are respectively connected with a plurality of voltage comparison output circuits, and the output ends of the voltage comparison output circuits are connected with the controller; the controller is connected with the generator controller and the driving system controller. The voltage sampling circuit is used for collecting the voltage of the battery bus and sending the collected voltage to each voltage comparison output circuit. The voltage comparison output circuit is used for comparing two input voltages and generating corresponding output signals. The controller receives the output signal of the voltage comparison output circuit, and then the current battery voltage state can be judged according to the current voltage comparison output circuit, the generated power of the range extender and the power used by the driving system are adjusted based on the current undervoltage level, and the voltage node is adjusted to a larger voltage when the undervoltage value is smaller, so that the larger generated power and the smaller required power are correspondingly adjusted. The problem that the generated power and the used power are not matched due to the fact that a single undervoltage point starts the range extender system to work and the generated power is output fixedly is solved.
In addition, the application also provides a power control method of the range extender system, which corresponds to the power control device of the range extender system and has the same effects.
Drawings
For a clearer description of embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a power control device of a range extender system according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a power control device of a range extender system according to an embodiment of the present application;
fig. 3 is a flowchart of a power control method of a range extender system according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
The application provides a range extender system power control device and a range extender system power control method.
In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.
Range extender generally refers to an electric vehicle component capable of providing additional electric energy so that an electric vehicle can increase driving range, and conventionally refers to a combination of an engine and a generator. The extended range electric automobile is an electric automobile which uses other energy sources (such as gasoline) to supply electric energy under the condition of insufficient electric quantity of a battery. The main working characteristics (concept) of the electric automobile are that the electric automobile works in a pure electric mode under most conditions (high probability), and works in a range-extending mode under few conditions (low probability), namely, electric energy generated by the range extender is supplied to a motor through a storage battery to drive, and meanwhile, the electric automobile can also be charged by the battery.
The range extender system can continuously monitor the battery power of the electric vehicle. When the battery level drops to a certain level, the range extender system is started. The fuel engine or the fuel cell drives a generator to work, and the generator can convert mechanical energy into electric energy. These electric power may be supplied directly to the electric motor of the electric vehicle for driving or used to charge a battery pack. Through the work of the range extender system, the endurance mileage of the electric vehicle is prolonged. When the battery level is again sufficient or the drive demand is over, the range extender system will cease to operate.
When the range extender system is running, the generator may produce more electrical energy than is actually used. In this case, the surplus electric power may be used to charge the battery for future use. On the other hand, the generated power of the range extender system may not be sufficient to meet the actual use requirements of the electric vehicle, and the vehicle may not be able to obtain enough power to meet the driving requirements, resulting in reduced performance or limited range. Because the controller always starts the range extender system to work at a fixed undervoltage point, the controller is controlled to output with fixed generated power, and cannot be regulated in combination with the current power demand, so that the generated power and the power are not matched.
In order to solve the problem that generated power and used power are not matched, an embodiment of the present application provides a power control device of a range extender system, and fig. 1 is a schematic diagram of the power control device of the range extender system, as shown in fig. 1, including:
a voltage sampling circuit 11, a plurality of voltage comparison output circuits 12, and a controller 13;
the input end of the voltage sampling circuit 11 is connected with the output end of the battery bus; the output ends of the voltage sampling circuits 11 are respectively connected with a plurality of voltage comparison output circuits 12, and the output ends of the voltage comparison output circuits 12 are connected with a controller 13; the controller 13 is connected to the generator controller 14 and the drive system controller 15.
The drive system mentioned in this embodiment refers to a system for supplying motive power to a vehicle. In electric vehicles, the drive system is typically composed of an electric motor and a battery. The battery serves as an energy storage device for supplying electric energy to the motor to drive the vehicle. The power usage of the drive system depends on the drive demand and the efficiency of the motor. Specifically, depending on throttle status and reduced power demand, the control system may adjust the torque value in real time, which may be achieved by controlling the output torque of the motor or engine to accommodate the reduced drive demand.
The generator controller 14 in this embodiment refers to a generator of the range extender system, and is not limited to the type of generator, and may be a fuel generator such as gasoline, diesel, natural gas or methanol, or may be a fuel cell.
The voltage sampling circuit 11 in this embodiment is configured to collect the voltage of the bus of the battery, and send the collected voltage to each voltage comparison output circuit 12. The voltage comparison output circuit 12 is used for comparing two input voltages and generating corresponding output signals. The voltage comparison output circuit 12 is specifically configured to compare the battery voltage value sent by the voltage sampling circuit 11 with a reference voltage value, and the output signal may be a logic high level (typically indicating that the input voltage is greater than the reference voltage) or a logic low level (typically indicating that the input voltage is less than the reference voltage). Specifically, a signal is output when the battery voltage value is lower than the reference voltage value. In this embodiment, the number of the voltage comparison output circuits 12 is plural, and plural reference voltage values, i.e. under-voltage points, may be set.
The controller 13 receives the output signal of the voltage comparison output circuit 12, and can determine the current battery voltage state to select the corresponding adjustment scheme. The specific control scheme is to control the generated power of the generator controller 14 and the electric power used by the drive system controller 15. The range extender corresponding to different battery voltages generates power and the power required by the driving system is different, the range extender corresponding to higher battery voltage generates power little, the driving system requires power big at the same time, and meanwhile, the range extender corresponding to lower battery bus voltage generates power big, and the driving system requires power little at the same time, so that the generated power is lower than the power required by the driving system when the battery voltage is low.
For example, the rated voltage of the battery is 620V, the number of the voltage comparison output circuits 12 is 3, and the reference voltages of the undervoltage points are 580V, 550V and 500V respectively; when the voltage is lower than 580V, the generated power of the range extender is slightly increased, and the power consumption of the driving system is slightly reduced; when the voltage is lower than 550V, the generated power of the range extender is increased, and the power consumption of the driving system is reduced greatly; when the voltage is lower than 550V, the generated power of the range extender is increased at the highest, and the power consumption of the driving system is reduced at the highest. For the classification and number of the reference voltages, the adjustment amplitude ratio or the specific value of the generated power and the used power is specifically set according to the actual use environment, and the embodiment is not specifically limited.
The range extender system power control device provided by the application comprises: a voltage sampling circuit 11, a plurality of voltage comparison output circuits 12, and a controller 13; the input end of the voltage sampling circuit 11 is connected with the output end of the battery bus; the output ends of the voltage sampling circuits 11 are respectively connected with a plurality of voltage comparison output circuits 12, and the output ends of the voltage comparison output circuits 12 are connected with a controller 13; the controller 13 is connected to the generator controller 14 and the drive system controller 15. The voltage sampling circuit 11 is used for collecting the bus voltage of the battery and sending the collected voltage to each voltage comparison output circuit 12. The voltage comparison output circuit 12 is used for comparing two input voltages and generating corresponding output signals. The controller 13 receives the output signal of the voltage comparison output circuit 12, and can determine the current battery voltage state according to the current voltage comparison output circuit 12, so as to select the corresponding adjustment scheme for controlling the generated power of the generator controller 14 and the used power of the driving system controller 15, thereby solving the problem that the generated power and the used power are not matched due to the single undervoltage point starting range extender system operation and the fixed generated power output.
According to the above embodiment, a specific scheme is provided in this embodiment, fig. 2 is a circuit diagram of a power control device of a range extender system according to an embodiment of the present application, as shown in fig. 2, where a voltage comparison output circuit 12 in the power control device of the range extender system includes: the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the first capacitor C1, the first operational amplifier U1 and the optical coupler OP1;
the output end of the voltage sampling circuit 11 is connected with the inverting input end of the first operational amplifier U1; the non-inverting input end of the first operational amplifier U1 is connected with the first end of the first resistor R1, the first end of the second resistor R2 and the first end of the third resistor R3; the second end of the first resistor R1 is connected with a power supply +VDD, and the second end of the second resistor R2 is connected with the ground; the output end of the first operational amplifier U1 is connected with the second end of the third resistor R3, the first end of the fourth resistor R4 and the negative electrode of the optical coupler OP1; the second end of the fourth resistor R4 and the anode of the optical coupler OP1 are connected with a power supply; the collector of the optical coupler OP1 is connected with the emitter of the optical coupler OP1 through a first capacitor C1, the emitter of the optical coupler OP1 is grounded, and the collector of the optical coupler OP1 is used as the output end of the voltage comparison output circuit 12.
In this embodiment, the first resistor R1 and the second resistor R2 form a voltage dividing circuit, and different reference voltage values can be set by adjusting the resistance values of the first resistor R1 and the second resistor R2; the first operational amplifier U1 is used as a comparator to compare the battery voltage value with the reference voltage value, when the battery voltage value is smaller than the reference voltage value, the operational amplifier outputs a logic low level, the light emitting diode of the optocoupler OP1 is conducted to emit light, the phototriode is conducted, and the collector electrode outputs a current signal; through the effect of light, the optical coupler OP1 realizes electric isolation between an input signal and an output signal and protects a circuit or equipment from the interference of the input signal, electric noise or high voltage. In fig. 2, 3 voltage comparison output circuits 12 are shown, and the specific number of voltage comparison output circuits 12 may be set according to actual needs by way of example only.
In addition, specifically, the voltage comparison output circuit 12 further includes: an eighth resistor R8;
the anode of the optocoupler OP1 is connected with a power supply through an eighth resistor R8.
The eighth resistor R8 is a luminosity adjusting resistor of the optical coupler OP1 and is used for adjusting the output light intensity of the optical coupler OP 1. The working current of the light emitting diode of the optical coupler OP1 can be changed by adjusting the luminosity of the optical coupler OP1 and the resistance value of the adjusting resistor. The luminous intensity and the working current are in a direct proportion relation, so that the working current of the light emitting diode of the optical coupler OP1 can be increased or decreased by increasing or decreasing the resistance value of the luminosity adjusting resistor, and the output light intensity is adjusted.
In addition, specifically, in order for the operator to clearly and intuitively understand the current battery voltage state, the voltage comparison output circuit 12 further includes: a ninth resistor R9 and a light emitting diode D1;
the collector of the optocoupler OP1 is connected with the cathode of the light emitting diode D1, the anode of the light emitting diode D1 is connected with a power supply, and the ninth resistor R9 is connected with the light emitting diode D1 in parallel.
When the optocoupler OP1 is turned on, the light emitting diode D1 emits light to display the current battery voltage state.
According to the above embodiment, the present embodiment provides a specific scheme, as shown in fig. 2, the voltage sampling circuit 11 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a second operational amplifier U2;
the first end L+ of the battery bus is connected to the inverting input end of the second operational amplifier U2 through a fifth resistor R5, the second end L-of the battery bus is connected to the non-inverting input end of the second operational amplifier U2 through a sixth resistor R6, the inverting input end of the second operational amplifier U2 is connected to the output end of the second operational amplifier U2 through a seventh resistor R7, and the output end of the second operational amplifier U2 serves as the output end of the voltage sampling circuit 11.
By this connection, the second operational amplifier U2 can amplify the voltage difference of the battery bus and output a voltage signal proportional to the input voltage difference. By adjusting the ratio of the seventh resistor R7 and the fifth resistor R5, the amplification factor can be set. And voltage sampling is carried out on the voltage bus by using an operational amplifier in a differential amplifier circuit connection mode.
In addition, specifically, the voltage sampling circuit 11 further includes: a second capacitor C2 and a third capacitor C3;
the second capacitor C2 is connected in parallel between the first end L+ of the battery bus and the ground terminal, and the third capacitor C3 is connected in parallel between the second end L-of the battery bus and the ground terminal.
The connecting capacitor is used between the two buses and the grounding end to filter high-frequency noise and stabilize sampling signals.
In addition, specifically, the voltage sampling circuit 11 further includes: a first diode VD1, a second diode VD2, a third diode VD3, a fourth diode VD4, and a tenth resistor R10;
the inverting input end of the second operational amplifier U2 is connected with the anode of the first diode VD1, the cathode of the second diode VD2 and the cathode of the third diode VD 3; the cathode of the first diode VD1 is grounded through a tenth resistor R10, the cathode of the second diode VD2 is connected with the non-inverting input end of the second operational amplifier U2, and the anode of the third diode VD3 is grounded; the non-inverting input terminal of the second operational amplifier U2 is connected to the cathode of the fourth diode VD4, and the anode of the fourth diode VD4 is grounded.
The second diode VD2 can reduce the voltage of the bus bars between the battery bus bars by a fixed value, thereby ensuring that the input voltage of the operational amplifier is within a suitable range.
The first diode VD1 prevents the bus voltage from exceeding the power supply range or the operating range of the operational amplifier. When the bus voltage exceeds the forward voltage drop of the diode, the diode is turned on, and the redundant voltage is shunted to the ground to protect the operational amplifier from damage.
Specifically, the third diode VD3 and the fourth diode VD4 are zener diodes. The bus voltage is prevented from exceeding the power supply range or the operating range of the operational amplifier. When the bus voltage exceeds the reverse breakdown voltage of the zener diode, the zener diode is turned on to shunt the excess voltage to ground, thereby protecting the op amp from damage.
According to the foregoing embodiment, this embodiment further provides a preferred solution, further including: a memory;
the memory is connected to the controller 13.
The memory is connected with the controller 13, and the received undervoltage signal and the adopted corresponding control strategy can be recorded in the memory, so that the inquiry of staff is facilitated.
The embodiment of the application also provides a power control method of the range extender system, which is applied to a power control device of the range extender system and comprises the following steps: a voltage sampling circuit 11, a plurality of voltage comparison output circuits 12, and a controller 13; the input end of the voltage sampling circuit 11 is connected with the output end of the battery bus; the output ends of the voltage sampling circuits 11 are respectively connected with a plurality of voltage comparison output circuits 12, and the output ends of the voltage comparison output circuits 12 are connected with a controller 13; the controller 13 is connected with the generator controller 14 and the driving system controller 15;
fig. 3 is a flowchart of a power control method of a range extender system according to an embodiment of the present application, where, as shown in fig. 3, the method includes:
s11: receiving the undervoltage signal of the voltage comparison output circuit 12;
s12: the generator controller 14 and the drive system controller 15 are regulated according to the undervoltage level corresponding to the current voltage comparison output circuit 12.
Receiving the under-voltage signal of the voltage comparison output circuit 12, the under-voltage signal can represent that the current battery voltage is lower than the reference voltage of the current voltage comparison output circuit 12; the adjustment scheme may be selected accordingly to control the generator controller 14, the drive system controller 15 based on the under-voltage level. The embodiment is not limited to a specific adjustment scheme, and may be a preset comparison table, where a level corresponds to a group of adjustment schemes; the control method can also be a preset adjustment amplitude proportion, one grade corresponds to a group of adjustment proportions, and the control is based on the adjustment proportions according to basic data or current data.
The power control method of the range extender system provided by the embodiment of the application is applied to a power control device of the range extender system and comprises the following steps: a voltage sampling circuit 11, a plurality of voltage comparison output circuits 12, and a controller 13; the input end of the voltage sampling circuit 11 is connected with the output end of the battery bus; the output ends of the voltage sampling circuits 11 are respectively connected with a plurality of voltage comparison output circuits 12, and the output ends of the voltage comparison output circuits 12 are connected with a controller 13; the controller 13 is connected with the generator controller 14 and the driving system controller 15; the method comprises the following steps: receiving the undervoltage signal of the voltage comparison output circuit 12; the generator controller 14 and the drive system controller 15 are regulated according to the undervoltage level corresponding to the current voltage comparison output circuit 12. The voltage sampling circuit 11 is used for collecting the bus voltage of the battery and sending the collected voltage to each voltage comparison output circuit 12. The voltage comparison output circuit 12 is used for comparing two input voltages and generating corresponding output signals. The controller 13 receives the output signal of the voltage comparison output circuit 12, and can determine the current battery voltage state according to the current voltage comparison output circuit 12, so as to select the corresponding adjustment scheme for controlling the generated power of the generator controller 14 and the used power of the driving system controller 15, thereby solving the problem that the generated power and the used power are not matched due to the single undervoltage point starting range extender system operation and the fixed generated power output.
According to the above embodiment, the present embodiment provides a specific scheme for adjusting the generator controller 14 and the driving system controller 15 according to the undervoltage level corresponding to the current voltage comparison output circuit 12, including:
determining the undervoltage level corresponding to the current voltage comparison output circuit 12;
selecting a corresponding generation power level and a power consumption power reduction level according to the undervoltage level;
adjusting the generator controller 14 according to the generated power level, and adjusting the drive system controller 15 according to the used power reduction level;
the higher the voltage corresponding to the undervoltage level is, the smaller the generated power corresponding to the generated power level is, and the smaller the electric power reduction amplitude corresponding to the electric power reduction level is.
The corresponding undervoltage level of the output circuit 12 is compared according to the current voltage, and the corresponding generation power level and the corresponding power reduction level are selected according to the undervoltage level.
For example, if the total number of the generated power levels is 3, the corresponding generated power level and the power consumption level is also 3; the first under-voltage level corresponds to the lowest first power generation level, illustratively 40% of rated power generation, and the first under-voltage level corresponds to the lowest power application level, illustratively 20% on the basis of the current power application; the second undervoltage level corresponds to a second power generation level that is medium, illustratively 70% of rated power generation, and the first undervoltage level corresponds to a power application level that is medium, illustratively 40% lower than the current power application; the third under-voltage level corresponds to the highest third generated power level, illustratively 100% of rated generated power, and the third under-voltage level corresponds to the highest applied power reduction level, illustratively 60% on the basis of the current applied power; the generator controller 14 and the driving system controller 15 are regulated according to corresponding preset regulation schemes, the generated power of the range extender is increased to corresponding power percentages according to different under-voltage states, and meanwhile, the power consumption of the driving system is reduced to corresponding percentages.
The power control device and the power control method for the range extender system provided by the application are described in detail above. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. A range extender system power control device, comprising:
a voltage sampling circuit (11), a plurality of voltage comparison output circuits (12), and a controller (13);
the input end of the voltage sampling circuit (11) is connected with the output end of the battery bus; the output ends of the voltage sampling circuits (11) are respectively connected with a plurality of voltage comparison output circuits (12), and the output ends of the voltage comparison output circuits (12) are connected with the controller (13); the controller (13) is connected with the generator controller (14) and the driving system controller (15).
2. The range extender system power control device of claim 1 wherein said voltage comparison output circuit (12) includes: the first resistor, the second resistor, the third resistor, the fourth resistor, the first capacitor, the first operational amplifier and the optocoupler;
the output end of the voltage sampling circuit (11) is connected with the inverting input end of the first operational amplifier; the non-inverting input end of the first operational amplifier is connected with the first end of the first resistor, the first end of the second resistor and the first end of the third resistor; the second end of the first resistor is connected with a power supply, and the second end of the second resistor is connected with the ground; the output end of the first operational amplifier is connected with the second end of the third resistor, the first end of the fourth resistor and the negative electrode of the optocoupler; the second end of the fourth resistor and the anode of the optocoupler are connected with a power supply; the collector of the optocoupler is connected with the emitter of the optocoupler through the first capacitor, the emitter of the optocoupler is grounded, and the collector of the optocoupler is used as the output end of the voltage comparison output circuit (12).
3. The range extender system power control device of claim 1 wherein said voltage sampling circuit (11) comprises: a fifth resistor, a sixth resistor, a seventh resistor, and a second operational amplifier;
the first end of the battery bus is connected to the inverting input end of the second operational amplifier through the fifth resistor, the second end of the battery bus is connected to the non-inverting input end of the second operational amplifier through the sixth resistor, the inverting input end of the second operational amplifier is connected to the output end of the second operational amplifier through the seventh resistor, and the output end of the second operational amplifier serves as the output end of the voltage sampling circuit (11).
4. The range extender system power control device of claim 2 wherein said voltage comparison output circuit (12) further comprises: an eighth resistor;
and the anode of the optocoupler is connected with a power supply through the eighth resistor.
5. The range extender system power control device of claim 2 wherein said voltage comparison output circuit (12) further comprises: a ninth resistor, a light emitting diode;
the collector of the optocoupler is connected with the cathode of the light emitting diode, the anode of the light emitting diode is connected with a power supply, and the ninth resistor is connected with the light emitting diode in parallel.
6. A range extender system power control device in accordance with claim 3 wherein said voltage sampling circuit (11) further comprises: the second capacitor and the third capacitor;
the second capacitor is connected in parallel between the first end of the battery bus and the ground end, and the third capacitor is connected in parallel between the second end of the battery bus and the ground end.
7. A range extender system power control device in accordance with claim 3 wherein said voltage sampling circuit (11) further comprises: a first diode, a second diode, a third diode, a fourth diode, and a tenth resistor;
the inverting input end of the second operational amplifier is connected with the anode of the first diode, the cathode of the second diode and the cathode of the third diode; the negative electrode of the first diode is grounded through the tenth resistor, the negative electrode of the second diode is connected with the non-inverting input end of the second operational amplifier, and the positive electrode of the third diode is grounded; the non-inverting input end of the second operational amplifier is connected with the negative electrode of the fourth diode, and the positive electrode of the fourth diode is grounded.
8. The range extender system power control device of claim 1 further comprising: a memory;
the memory is connected to the controller (13).
9. The utility model provides a range extender system power control method which is characterized in that the range extender system power control device comprises: a voltage sampling circuit (11), a plurality of voltage comparison output circuits (12), and a controller (13); the input end of the voltage sampling circuit (11) is connected with the output end of the battery bus; the output ends of the voltage sampling circuits (11) are respectively connected with a plurality of voltage comparison output circuits (12), and the output ends of the voltage comparison output circuits (12) are connected with the controller (13); the controller (13) is connected with the generator controller (14) and the driving system controller (15);
the method comprises the following steps:
receiving an undervoltage signal of the voltage comparison output circuit (12);
and adjusting the generator controller (14) and the driving system controller (15) according to the undervoltage level corresponding to the current voltage comparison output circuit (12).
10. The range extender system power control method of claim 9 wherein said adjusting said generator controller (14), said drive system controller (15) according to the current undervoltage level corresponding to said voltage comparison output circuit (12) comprises:
determining the undervoltage level corresponding to the current voltage comparison output circuit (12);
selecting a corresponding generation power level and a power consumption power reduction level according to the undervoltage level;
-adjusting the generator controller (14) in accordance with the generated power level, and-adjusting the drive system controller (15) in accordance with the used power reduction level;
the higher the voltage corresponding to the undervoltage level is, the smaller the generated power corresponding to the generated power level is, and the smaller the electric power reduction amplitude corresponding to the electric power reduction level is.
CN202311113078.XA 2023-08-31 2023-08-31 Range extender system power control device and method Pending CN116901733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311113078.XA CN116901733A (en) 2023-08-31 2023-08-31 Range extender system power control device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311113078.XA CN116901733A (en) 2023-08-31 2023-08-31 Range extender system power control device and method

Publications (1)

Publication Number Publication Date
CN116901733A true CN116901733A (en) 2023-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311113078.XA Pending CN116901733A (en) 2023-08-31 2023-08-31 Range extender system power control device and method

Country Status (1)

Country Link
CN (1) CN116901733A (en)

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