Extended-range custom energy management control method

Abstract

The invention discloses an extended-range custom energy management control method, which comprises the following steps of: S10, powering on a vehicle, and enabling the whole vehicle to enter a Ready state capable of powering on high voltage; step S20, after the customer predicts the required electric quantity, the customer selects the required power generation power through the human-computer interaction interface according to the required power generation duration, and the VCU executes the customer request and instructs the RCU to generate power according to the required power; and step S30, after the VCU determines the demand of the current generation power Pinput, performing logic judgment according to the current total use power Ptotal of the whole vehicle, the current allowable charging power Pcharge of the battery and the current maximum power P1 which can be generated by the range extender. According to the method, unnecessary energy waste is avoided by accurately estimating the electric quantity demand and intelligently adjusting the power generation strategy, the use efficiency of the range extender is improved, and the small power P0 is defaulted as the initial power generation power value.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle control, and in particular, relates to a range-extended customized energy management control method. Background Art

[0002] The current penetration rate of new energy in automobile products is increasing. Pure electric vehicles have the advantages of good driving performance and low energy consumption costs, but there is range anxiety. Therefore, the share of hybrid vehicles that take into account low energy consumption and long range has increased significantly in the past two years. Among them, plug-in extended-range vehicles are a type of hybrid new energy vehicles. They are closer to the properties of pure electric vehicles. Most of the time, they are powered by electricity. Compared with other hybrid vehicles, they usually have lower energy consumption costs. Range extenders are mostly used temporarily to solve customers' range anxiety.

[0003] Commercial vehicles have heavy loads and high power requirements, so new energy commercial vehicles have an increasing demand for battery power, and range anxiety is more significant; many automakers are developing and gradually launching extended-range, high-capacity commercial vehicles on the market; in terms of energy management, when the vehicle's SOC drops to the designed limit, the range extender system will be controlled to intervene to supplement power to the battery and drive motor to maintain endurance and a certain power; this method is called active power generation control mode because the vehicle VCU (vehicle controller) automatically starts the range extender system to generate electricity according to the set strategy.

[0004] In actual customer use, commercial vehicle customers will face many complex scenarios. The weight, mileage, and arrival time of the order may be random, the route may be temporarily planned, and the charging facilities along the route are also determined according to the route.

[0005] Due to the many uncertainties in the above-mentioned commercial vehicle orders, in order to cover all usage scenarios and ensure a balance between low operating costs and efficiency, it is necessary to identify a large number of different order parameters and route data. According to the active power generation model mentioned earlier, it is obviously impossible to have an energy management control strategy that can solve all problems at present. Summary of the invention

[0006] The present invention provides an extended-range custom energy management control method, which solves the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a range-extended custom energy management control method, comprising the following steps: Step S10, the vehicle is powered on, and the vehicle enters a Ready state where high voltage can be supplied; Step S20: After the customer predicts the required power, he / she selects the required power through the human-computer interaction interface according to the desired power generation duration. The VCU executes the customer's request and instructs the RCU to generate power according to the required power. Step S30: When the VCU determines the current power generation P input After the demand is met, the total power P of the vehicle will be total , the current allowable charging power P of the battery charge The logic judgment is performed based on the maximum power P1 that the range extender can currently generate; Step S40: When the range extender assembly controller RCU receives the final adjusted power value P input After that, the actual power generation is calculated by EMS and GCU, and sent to the vehicle instrument for display through the vehicle Can network; Step S50: After receiving the termination signal input by the customer, the VCU and the RCU execute exiting the power generation mode.

[0008] Preferably, the step S20 includes the following steps: Step S21, the customer first enters the REV mode through the mode switch; Step S22, after entering the REV mode, the customer selects the power generation through the power adjustment switch or the power selection interface in the REV mode; Step S23, after receiving the input, the VCU enters the REV custom power generation mode, and first uses the default power as the initial power generation value; Step S24, determine whether the required power value is input stably for 4 seconds. If so, the VCU will use the power value P0 as the latest power target input value. If not, the VCU will not respond and repeat the determination.

[0009] Preferably, the step S30 includes the following steps: Step S31, power generation demand P input and the total power P currently used by the vehicle total In comparison, judging P input ≤P total Is it true? If so, proceed to step S311; if not, proceed to step S321; Step S311, determine P input ≤P1 is true, if so, use P input =P0 initial value as the input power value for the final GCU execution, otherwise P input =P1 value is used as the input power value of the final GCU execution; Step S321, determine P input ≤P1 is established, then judge whether P input -P total≤P charge Is it true? If P input ≤P1 and P input -P total ≤P charge , then use P input =P0 initial value is used as the input power value for the final GCU execution. If P input ≤P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value of the final GCU execution. If P input >P1 and P input -P total ≤P charge , then use P input =P1 value is used as the input power value for the final GCU execution. If P input >P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value for the final GCU execution.

[0010] Preferably, the step S40 includes the following steps: Step S41: When the range extender assembly controller RCU receives the final adjusted power value P input After that, the RCU will coordinate the range extender engine control unit EMS and the range extender generator control unit GCU to complete the power generation of the customized power; Step S42, the generator controller first starts the motor to reverse the engine to a speed near the set speed according to the GCU and RCU instructions, and the engine control unit EMS completes the injection and ignition work near the speed to complete the idle start of the engine. After the range extender assembly completes the idle start, it enters the idle mode; Step S43: When the RCU successfully completes the idle start of the range extender assembly, the P input by the VCU is executed. input Power command, according to the optimal map calibrated by the range extender assembly test bench, select the appropriate power point for power generation, GCU controls the generator to pull the engine crankshaft, gradually increasing or decreasing the speed to the selected power point for power generation, and speed control can be used to start at this point to maintain a steady state. The generator controlled by the GCU generates electricity at a constant speed at this power point due to the drive of the engine; In step S44, the GCU needs to calculate the actual power generation according to the current actual power generation current, and send it to the vehicle instrument through the vehicle Can network for display, so that customers can understand the current power generation situation and adjust the power or exit the custom power generation mode at any time.

[0011] The beneficial effects of adopting the above technical solution are: 1. Improve energy efficiency: By accurately estimating power demand and intelligently adjusting power generation strategies, unnecessary energy waste is avoided and the efficiency of range extenders is improved.

[0012] 2. Enhanced user experience: Users can flexibly adjust the power generation control strategy according to their own driving plans and needs to achieve a personalized charging experience.

[0013] 3. Extend vehicle range: By rationally allocating power and power generation time, it effectively alleviates range anxiety caused by insufficient power and improves the safety and reliability of long-distance driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall logic control flow chart provided by the present invention; Figure 2 is a logic control flow chart of step S20; Figure 3 is a logic control flow chart of step S30; Figure 4 is a logic control flow chart of step S40; The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0015] Specifically, Figures 1 to 4 As shown, a range-extended custom energy management control method includes the following steps: Step S10, the vehicle is powered on, and the vehicle enters a Ready state where high voltage can be supplied; Step S20: After the customer predicts the required power, he / she selects the required power through the human-computer interaction interface according to the desired power generation duration. The VCU executes the customer's request and instructs the RCU to generate power according to the required power. Step S30: When the VCU determines the current power generation P input After the demand is met, the total power P of the vehicle will be total , the current allowable charging power P of the battery charge The logic judgment is performed based on the maximum power P1 that the range extender can currently generate; Step S40: When the range extender assembly controller RCU receives the final adjusted power value P input After that, the actual power generation is calculated by EMS and GCU, and sent to the vehicle instrument for display through the vehicle Can network; Step S50: After receiving the termination signal input by the customer, the VCU and the RCU execute exiting the power generation mode.

[0016] It should be noted that the present invention mainly allows customers to estimate the amount of electricity required to be supplemented by the range extender according to their current electricity and cargo conditions and the distribution of charging facilities on their planned routes, and to achieve a completely customized power generation control effect by controlling the power generation power and power generation time of the range extender by themselves. The specific principle is that after the customer predicts the required electricity, he selects the power generation power he needs through the human-computer interaction interface (such as a large screen, etc.) according to the desired power generation time. The vehicle controller (hereinafter referred to as: VCU) executes the customer's request and instructs the range extender assembly controller (hereinafter referred to as: RCU) to generate electricity according to the required power. The RCU coordinates the engine and the generator to generate electricity according to the optimal power generation point to supplement the vehicle's electricity. When receiving the termination signal input by the customer, the VCU and RCU execute the exit from the power generation mode; In addition, after the vehicle is powered on, the whole vehicle fault detection is first carried out to determine whether each function is normal. If each function is detected to be normal, the customer follows the regular startup operation and the whole vehicle enters the Ready state where high voltage can be supplied. Otherwise, it enters the relevant fault mode. After normal power-on and Ready, the whole vehicle will enter the set default or memory mode state, such as EV pure electric mode, HEV hybrid mode and REV custom power generation mode, etc.; if the customer chooses to use custom power generation, the customer needs to enter the custom power generation mode first.

[0017] The step S20 comprises the following steps: Step S21, the customer first enters the REV mode through the mode switch; Step S22, after entering the REV mode, the customer selects the power generation through the power adjustment switch or the power selection interface in the REV mode; Step S23, after receiving the input, the VCU enters the REV custom power generation mode, and first uses the default power as the initial power generation value; Step S24, determine whether the required power value is input stably for 4 seconds. If so, the VCU will use the power value P0 as the latest power target input value. If not, the VCU will not respond and repeat the determination.

[0018] It should be noted that the customer first enters the custom power generation mode (REV mode) through the mode switch. The command signal can be selected through a hardware key signal, such as a dashboard key switch; or a Can signal, such as the vehicle mode interface on the MP5 large screen; In addition, the purpose of step S24 is to prevent the client from continuously changing its power demand and the range extender assembly from frequently adjusting the power point in a short period of time, causing engine failure and other problems.

[0019] The step S30 comprises the following steps: Step S31, power generation demand P input and the total power P currently used by the vehicle total In comparison, judging P input ≤P total Is it true? If so, proceed to step S311; if not, proceed to step S321; Step S311, determine P input ≤P1 is true, if so, use P input =P0 initial value as the input power value for the final GCU execution, otherwise P input =P1 value is used as the input power value of the final GCU execution; Step S321, determine P input ≤P1 is established, then judge whether P input -P total ≤P charge Is it true? If P input ≤P1 and P input -P total ≤P charge , then use P input =P0 initial value is used as the input power value for the final GCU execution. If P input ≤P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value of the final GCU execution. If P input >P1 and P input -P total ≤P charge , then use P input =P1 value is used as the input power value for the final GCU execution. If P input >P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value for the final GCU execution.

[0020] It should be noted that P in step 30 input The final VCU input value can be the value obtained above directly, or a point close to the above value and with good economy in the range extender MAP.

[0021] The step S40 comprises the following steps: Step S41: When the range extender assembly controller RCU receives the final adjusted power value P input After that, the RCU will coordinate the range extender engine control unit EMS and the range extender generator control unit GCU to complete the power generation of the customized power; Step S42, the generator controller first starts the motor to reverse the engine to a speed near the set speed according to the GCU and RCU instructions, and the engine control unit EMS completes the injection and ignition work near the speed to complete the idle start of the engine. After the range extender assembly completes the idle start, it enters the idle mode; Step S43: When the RCU successfully completes the idle start of the range extender assembly, the P input by the VCU is executed. input Power command, according to the optimal map calibrated by the range extender assembly test bench, select the appropriate power point for power generation, GCU controls the generator to pull the engine crankshaft, gradually increasing or decreasing the speed to the selected power point for power generation, and speed control can be used to start at this point to maintain a steady state. The generator controlled by the GCU generates electricity at a constant speed at this power point due to the drive of the engine; In step S44, the GCU needs to calculate the actual power generation according to the current actual power generation current, and send it to the vehicle instrument through the vehicle Can network for display, so that customers can understand the current power generation situation and adjust the power or exit the custom power generation mode at any time.

[0022] It should be noted that if the engine fails to start or run during the execution of step S42 and step S43, it will continue to try to start, and after reaching the set upper limit of the number of starts, it will stop and restart. RCU will feedback the VCU start failure. VCU will exit the current custom power generation mode, upload the fault code, and prompt on the instrument; In addition, when the new fixed-point power generation is input, the RCU will control the range extender assembly to adjust the power, which can be executed according to a certain engine speed gradient change, such as 500rpm / s, to ensure NVH requirements; At the same time, when the exit from the REV custom power generation mode is received, the RCU controls the range extender EMS and MCU unit to complete the power change or shutdown of the range extender assembly according to whether the customer chooses the hybrid HEV mode or the pure electric EV mode after exiting.

[0023] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A range-extended custom energy management control method, characterized in that: The following steps are involved: Step S10, the vehicle is powered on, and the vehicle enters a Ready state where high voltage can be supplied; Step S20: After the customer predicts the required power, he / she selects the required power through the human-computer interaction interface according to the desired power generation duration. The VCU executes the customer's request and instructs the RCU to generate power according to the required power. Step S30, when the VCU determines the current power generation P input After the demand is met, the total power P of the vehicle will be total , the current allowable charging power P of the battery charge The logic judgment is performed based on the maximum power P1 that the range extender can currently generate; Step S40: When the range extender assembly controller RCU receives the final adjusted power value P input After that, the actual power generation is calculated by EMS and GCU, and sent to the vehicle instrument for display through the vehicle Can network; Step S50: After receiving the termination signal input by the customer, the VCU and the RCU execute exiting the power generation mode.

2. The extended-range custom energy management control method according to claim 1, characterized in that: The step S20 comprises the following steps: Step S21, the customer first enters the REV mode through the mode switch; Step S22, after entering the REV mode, the customer selects the power generation through the power adjustment switch or the power selection interface in the REV mode; Step S23, after receiving the input, the VCU enters the REV custom power generation mode, and first uses the default power as the initial power generation value; Step S24, determine whether the required power value is input stably for 4 seconds. If so, the VCU will use the power value P0 as the latest power target input value. If not, the VCU will not respond and repeat the determination.

3. The extended-range custom energy management control method according to claim 1, characterized in that: The step S30 comprises the following steps: Step S31, power generation demand P input and the total power P currently used by the vehicle total In comparison, judging P input ≤P total Is it true? If so, proceed to step S311; if not, proceed to step S321; Step S311, determine P input ≤P1 is true, if so, use P input =P0 initial value as the input power value for the final GCU execution, otherwise P input =P1 value is used as the input power value of the final GCU execution; Step S321, determine P input ≤P1 is established, then judge whether P input -P total ≤P charge Is it true? If P input ≤P1 and P input -P total ≤P charge , then use P input =P0 initial value is used as the input power value for the final GCU execution. If P input ≤P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value of the final GCU execution. If P input >P1 and P input -P total ≤P charge , then use P input =P1 value is used as the input power value for the final GCU execution. If P input >P1 and P input -P total >P charge , then use P input =P total +P charge The value is used as the input power value for the final GCU execution.

4. The extended-range custom energy management control method according to claim 1, characterized in that: The step S40 comprises the following steps: Step S41: When the range extender assembly controller RCU receives the final adjusted power value P input After that, RCU will coordinate the range extender engine control unit EMS and the range extender generator control unit GCU to complete the power generation of customized power; Step S42, the generator controller first starts the motor to reverse the engine to a speed near the set speed according to the GCU and RCU instructions, and the engine control unit EMS completes the injection and ignition work near the speed to complete the idle start of the engine. After the range extender assembly completes the idle start, it enters the idle mode; Step S43: When the RCU successfully completes the idle start of the range extender assembly, the P input by the VCU is executed. input Power command, according to the optimal map calibrated by the range extender assembly test bench, select the appropriate power point for power generation, GCU controls the generator to pull the engine crankshaft, gradually increasing or decreasing the speed to the selected power point for power generation, and speed control can be used to start at this point to maintain a steady state. The generator controlled by the GCU generates electricity at a constant speed at this power point due to the drive of the engine; In step S44, the GCU needs to calculate the actual power generation according to the current actual power generation current, and send it to the vehicle instrument through the vehicle Can network for display, so that customers can understand the current power generation situation and adjust the power or exit the custom power generation mode at any time.

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