Range extender intelligent control system and control method for new energy mining truck

Abstract

The invention provides a range extender intelligent control system for a new energy mining truck. The range extender intelligent control system comprises a battery SOC reading module; the range extender efficient operation interval setting module is used for setting the efficient operation interval of the range extender; an accelerator and brake pedal depth reading module; a battery charging and discharging power calculation module; a second charging power generation module; a third charging power fine tuning module; the range extender control module is combined with a matched range extender intelligent control method, the power of the range extender can be adjusted in real time according to the SOC change of a battery and the driving intention of a driver through accurate control and optimal scheduling of the range extender, and the energy use efficiency is improved. By dynamically adjusting the power of the range extender, the cruising ability of the electric vehicle can be optimized, and the driving experience is improved. The fuel efficiency of the range extender is fully improved, emission is reduced, the endurance mileage is increased, and energy is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to an intelligent control system and control method for a range extender of a new energy mining truck. Background Art

[0002] At present, there are some new energy mining truck range extender control methods on the market, but most of them have problems such as simple control strategy, low intelligence, and low energy efficiency. For example: the high-efficiency operating range of the range extender is not considered, and the fuel economy is not high; it is simply started and stopped according to SOC, which is not intelligent enough.

[0003] Therefore, it is of great practical significance and application value to develop an intelligent control method and system for a new energy mining truck range extender to achieve precise control and optimal scheduling of the range extender. Summary of the invention

[0004] The present invention proposes an intelligent control system and control method for a range extender of a new energy mining truck, which solves the problems of simple control strategy, low intelligence, and low energy efficiency ratio in the range extender of a new energy mining truck in the prior art. The technical solution of the present invention is implemented as follows:

[0005] An intelligent control method for a range extender of a new energy mining truck comprises the following steps: reading initial state parameters of the new energy mining truck; generating a first charging power according to the ratio of the remaining battery power to the rated charging capacity of the battery SOC and the allowable charging and discharging power of the battery; generating a second charging power through the high-efficiency operating range of the range extender on the basis of the first charging power; correcting the second charging power through the depth of the accelerator and brake pedals and the actual power used by electrical appliances to generate a third charging power; and controlling the start and stop and the operating power of the range extender according to the third charging power.

[0006] As a preferred technical solution, the initial state parameters of the new energy mining truck include the ratio of the remaining battery power to the rated charging capacity of the battery, the efficient operating range of the range extender, the depth of the accelerator and brake pedals, and the allowable charging and discharging power of the battery.

[0007] As a preferred technical solution, the ratio of the remaining battery power to the rated charging capacity of the battery is SOC, which is expressed as follows: when SOC = 0%, it means that the battery is fully discharged; when SOC = 100%, it means that the battery is fully charged, and other states take values ​​within the range of 0 to 100%.

[0008] As a preferred technical solution, the actual power used by electrical appliances is calculated based on the voltage and current fed back by each high-voltage electrical appliance, and the high-voltage electrical appliances include motors, DC-DC, DC-AC, and air conditioners.

[0009] As a preferred technical solution, two intermediate thresholds S1 and S2 are set for the battery SOC, and S1 is less than S2;

[0010] When the battery SOC < S1: The range extender starts and charges at the charging power allowed by the battery.

[0011] When the battery SOC > S2: The range extender stops working.

[0012] As a preferred technical solution, the first charging power P1 is calculated based on the current battery SOC and the charge and discharge power allowed by the battery, and compared with the high-efficiency operation range of the range extender to obtain the second charging power P2:

[0013] If the first charging power P1 is within the high-efficiency operation range of the range extender, then the second charging power P2 = the first charging power P1;

[0014] If the first charging power P1 is less than the minimum value of the high-efficiency operation range of the range extender, then the second charging power P2 = the first charging power P1;

[0015] If the first charging power P1 is greater than the maximum value of the high-efficiency operation range of the range extender, then the second charging power P2 = the maximum value of the high-efficiency operation range of the range extender.

[0016] As a preferred technical solution, the third charging power P3 is determined according to the driving intention according to the following rules:

[0017] 1) Within a period of time t1, the throttle pedal is deeply depressed and the actual power of the electrical appliance is relatively large, then

[0018] p1 = the maximum discharge power of the battery + the second charging power P2 of the range extender;

[0019] If the actual power of the electrical appliance is close to P1, then the second charging power is appropriately increased as the third charging power to ensure the normal operation of the vehicle; if the actual power of the electrical appliance is much less than P1, then the third charging power = the second charging power P2;

[0020] 2) Within a period of time t1, the brake pedal is deeply depressed and the actual power of the electrical appliance is relatively small, and even the motor is charging in reverse, then:

[0021] p2 = the second charging power of the range extender + the actual power of the electrical appliance.

[0022] If the maximum charging power of the battery is close to p2, then the second charging power is appropriately decreased as the third charging power to avoid damaging the battery; if the maximum charging power of the 2 batteries is much greater than p2, then the third charging power P3 = the second charging power P2.

[0023] As a preferred technical solution, the start / stop and power of the range extender are determined according to the third charging power P3:

[0024] When the third charging power>0: the range extender is started and charges at the third charging power.

[0025] When the third charging power ≤ 0: the range extender stops.

[0026] As a preferred technical solution, the efficient operating range of the range extender refers to the range with lower specific fuel consumption in the universal characteristic curve of the engine, and its value is manually calibrated according to the specific range extender.

[0027] An intelligent control system for a range extender of a new energy mining truck, comprising:

[0028] Battery SOC reading module: used to read the battery SOC information in real time;

[0029] Range extender efficient operation interval setting module: used to set the efficient operation interval of the range extender;

[0030] Throttle and brake pedal depth reading module: used to read the depth information of the throttle and brake pedals in real time;

[0031] Battery charge and discharge power calculation module: generates a first charging power according to the battery SOC and the charge and discharge power allowed by the battery;

[0032] A second charging power generating module: based on the first charging power, generating a second charging power through the high-efficiency operation range of the range extender;

[0033] A third charging power fine-tuning module: fine-tuning the second charging power according to the accelerator and brake pedal depths and the actual power used by the electrical appliance to generate a third charging power;

[0034] Range extender control module: controls the start and stop and working power of the range extender according to the third charging power.

[0035] Compared with the prior art, this solution has the following beneficial effects: through precise control and optimized scheduling of the range extender, the power of the range extender can be adjusted in real time according to the SOC change of the battery and the driving intention of the driver, thereby improving the energy efficiency. By dynamically adjusting the power of the range extender, the present invention can optimize the endurance of the electric vehicle and enhance the driving experience. The fuel efficiency of the range extender is fully improved, emissions are reduced, the range is increased, and energy is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A method flow chart of an intelligent control method for a range extender of a new energy mining truck according to the present invention;

[0038] Figure 2 The present invention is a block diagram of the overall structure of an intelligent control system for a range extender used in new energy mining trucks. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Reference Figure 2 The present invention provides an intelligent control system for a range extender of a new energy mining truck, comprising the following main modules: a battery SOC reading module: used to read the SOC information of the battery in real time; a range extender efficient operation interval setting module: used to set the efficient operation interval of the range extender; a throttle and brake pedal depth reading module: used to read the depth information of the throttle and brake pedals in real time; a battery charge and discharge power calculation module: which generates a first charging power according to the battery SOC and the charge and discharge power allowed by the battery; a second charging power generation module: based on the first charging power, a second charging power is generated through the efficient operation interval of the range extender; a third charging power fine-tuning module: the second charging power is fine-tuned through the throttle and brake pedal depths and the actual power used by the electrical appliances to generate a third charging power; a range extender control module: the start and stop and working power of the range extender are controlled according to the third charging power.

[0041] At the same time, a method for intelligent control of a range extender for a new energy mining truck is provided. The main control idea can be summarized as follows: according to the battery SOC and the charge and discharge power allowed by the battery, a first charging power is generated. When the battery SOC is lower than S1, the range extender starts, and the power is the charging power allowed by the battery. When the battery SOC is higher than S2, the range extender stops working. S1 is less than S2.

[0042] The first charging power is compared with the efficient operating range of the range extender. If the first charging power is within the efficient operating range of the range extender, the first charging power is regarded as the second charging power; if the first charging power is less than the efficient operating range of the range extender, the first charging power is regarded as the second charging power; if the first charging power is greater than the efficient operating range of the range extender, the maximum power within the efficient operating range of the range extender is regarded as the second charging power.

[0043] The driver's driving intention is judged by the depth of the accelerator and brake pedal and the actual power used by the electrical appliances. For example, if the driver continues to step on the accelerator deeply for a period of time t1, and the actual power of the electrical appliances is large, it means that the vehicle is driving uphill with a heavy load. At this time, it is judged whether the sum of the maximum discharge power of the battery and the second charging power of the range extender p1 is greater than the actual power of the electrical appliances. If the actual power of the electrical appliances is very close to p1, the second charging power is appropriately increased and regarded as the third charging power to ensure the normal operation of the vehicle. If the actual power of the electrical appliances is much less than p1, the second charging power is regarded as the third charging power.

[0044] On the contrary, if the driver continues to step on the brakes deeply, and the actual power of the electrical appliances is small, or even the motor is dragging in reverse to charge the battery, then it is determined whether the maximum charging power of the battery is less than the sum of the second charging power of the range extender and the actual power of the electrical appliances p2. If the maximum charging power of the battery is already very close to p2, the second charging power is appropriately lowered and regarded as the third charging power to ensure that the charging power will not damage the battery. If the maximum charging power of the battery is much greater than p2, the second charging power is regarded as the third charging power.

[0045] The start / stop and power of the range extender are determined by judging the third charging power.

[0046] See also Figure 1 , specifically, the following steps are included:

[0047] 1. Initialization parameters

[0048] s1: Battery SOC low threshold. When the SOC is lower than this value, the range extender starts.

[0049] s2: Battery SOC high threshold. When the SOC is higher than this value, the range extender stops working.

[0050] Range extender efficient operating range: the power range within which the range extender operates most efficiently.

[0051] Allowable charge and discharge power of the battery: the maximum power at which the battery can be safely charged and discharged.

[0052] 2. Determine the range extender status based on the battery SOC

[0053] When the battery SOC < S1: The range extender starts and charges at the charging power allowed by the battery.

[0054] When the battery SOC > S2: The range extender stops working.

[0055] 3. Calculate the first charging power and adjust it to the second charging power

[0056] The first charging power: It is calculated based on the current battery SOC and the charge and discharge power allowed by the battery.

[0057] Compare with the high-efficiency operation range of the range extender:

[0058] If the first charging power is within the high-efficiency operation range of the range extender, then the second charging power = the first charging power. If the first charging power is less than the minimum value of the high-efficiency operation range of the range extender, then the second charging power = the first charging power (because it is already the minimum value and no adjustment is needed). If the first charging power is greater than the maximum value of the high-efficiency operation range of the range extender, then the second charging power = the maximum value of the high-efficiency operation range of the range extender.

[0059] 4. Adjust the third charging power according to the driving intention

[0060] 4.1 The driver continuously depresses the accelerator deeply and the actual power of the electrical appliances is large

[0061] Judgment condition: Within a period of time t1, the depth of the accelerator pedal is large and the actual power of the electrical appliances is large.

[0062] Calculate p1: The maximum discharge power of the battery + the second charging power of the range extender.

[0063] Adjust the third charging power: If the actual power of the electrical appliances is close to p1, then appropriately increase the second charging power as the third charging power to ensure the normal operation of the vehicle. If the actual power of the electrical appliances is much less than p1, then the third charging power = the second charging power.

[0064] 4.2 The driver continuously depresses the brake deeply and the actual power of the electrical appliances is small

[0065] Judgment condition: Within a period of time t1, the depth of the brake pedal is large and the actual power of the electrical appliances is small, and even the motor is in reverse charging.

[0066] Calculate p2: The second charging power of the range extender + the actual power of the electrical appliances.

[0067] Adjust the third charging power: If the maximum charging power of the battery is close to p2, then appropriately decrease the second charging power as the third charging power to avoid damaging the battery. If the maximum charging power of the battery is much greater than p2, then the third charging power = the second charging power.

[0068] 5. Determine the start and stop and power of the range extender based on the third charging power

[0069] When the third charging power>0: the range extender is started and charges at the third charging power.

[0070] When the third charging power ≤ 0: the range extender stops.

[0071] According to the third charging power calculated in the above steps, the actual output power of the range extender is adjusted to meet the energy demand of the vehicle while ensuring the safety of the battery and the operating efficiency of the range extender.

[0072] It should be noted that in actual implementation, the setting of time t1 and the threshold setting of accelerator and brake pedal depth need to be considered. These parameters may need to be adjusted according to the specific vehicle model and driving habits. It is also necessary to consider the impact of factors such as battery health and temperature on charging power, as well as factors such as the response speed and stability of the range extender. When adjusting the charging power, it is necessary to ensure that the adjustment process is smooth to avoid impact on the vehicle and battery.

[0073] Through precise control and optimized scheduling of the range extender, the power of the range extender can be adjusted in real time according to the SOC changes of the battery and the driving intention of the driver, thereby improving energy efficiency. By dynamically adjusting the power of the range extender, the present invention can optimize the endurance of electric vehicles and enhance the driving experience. Fully improve the fuel efficiency of the range extender, reduce emissions, increase the mileage, and save energy

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent control method for a range extender of a new energy mining truck, characterized in that: It includes the following steps: Read the initial state parameters of the new energy mining truck; generate the first charging power according to the ratio SOC of the remaining battery power to the rated charging capacity of the battery and the allowable charge and discharge power of the battery; on the basis of the first charging power, generate the second charging power through the high-efficiency operation range of the range extender; correct the second charging power through the depth of the accelerator and brake pedals and the actual power consumption of the electrical appliances to generate the third charging power; control the start, stop and working power of the range extender according to the third charging power.

2. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: The initial state parameters of the new energy mining truck include the ratio of the remaining battery power to the rated charging capacity of the battery, the high-efficiency operation range of the range extender, the depth of the accelerator and brake pedals, and the allowable charge and discharge power of the battery.

3. The intelligent control method for a range extender of a new energy mining truck according to claim 2, characterized in that: The ratio of the remaining battery power to the rated charging capacity of the battery is SOC, which is expressed as follows: when SOC = 0%, it means the battery is fully discharged; when SOC = 100%, it means the battery is fully charged, and other states are within the range of 0-100%.

4. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: The actual power consumption of the electrical appliances is calculated according to the voltage and current feedback by each high-voltage electrical appliance, and each high-voltage electrical appliance includes a motor, a DC-DC, a DC-AC, and an air conditioner.

5. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: Set two intermediate thresholds S1 and S2 for the battery SOC, and S1 is less than S2; When the battery SOC < S1: The range extender starts and charges at the allowable charging power of the battery. When the battery SOC > S2: The range extender stops working.

6. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: The first charging power P1 is calculated based on the current battery SOC and the allowable charge and discharge power of the battery, and is compared with the high-efficiency operation range of the range extender to obtain the second charging power P2: If the first charging power P1 is within the high-efficiency operation range of the range extender, then the second charging power P2 = the first charging power P1; If the first charging power P1 is less than the minimum value of the high-efficiency operation range of the range extender, then the second charging power P2 = the first charging power P1; If the first charging power P1 is greater than the maximum value of the high-efficiency operation range of the range extender, then the second charging power P2 = the maximum value of the high-efficiency operation range of the range extender.

7. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: The third charging power P3 is determined according to the driving intention according to the following rules: 1) Within a period of time t1, the depth of the accelerator pedal is large and the actual power of the electrical appliance is large, then p1 = the maximum discharge power of the battery + the second charging power P2 of the range extender; If the actual power of the electrical appliance is close to P1, then appropriately increase the second charging power as the third charging power to ensure the normal operation of the vehicle; if the actual power of the electrical appliance is much less than P1, then the third charging power = the second charging power P2; 2) Within a period of time t1, the depth of the brake pedal is large and the actual power of the electrical appliance is small, and even the motor is in reverse charging, then: p2 = the second charging power of the range extender + the actual power of the electrical appliance. If the maximum charging power of the battery is close to p2, then appropriately reduce the second charging power as the third charging power to avoid damaging the battery; if the maximum charging power of the 2 batteries is much greater than p2, then the third charging power P3 = the second charging power P2.

8. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: Decide the start, stop and power of the range extender according to the third charging power P3: When the third charging power>0: the range extender is started and charges at the third charging power. When the third charging power ≤ 0: the range extender stops.

9. The intelligent control method for a range extender of a new energy mining truck according to claim 1, characterized in that: The high-efficiency operating range of the range extender refers to a range with lower specific fuel consumption in the universal characteristic curve of the engine, and its value is manually calibrated according to the specific range extender.

10. An intelligent control system for a range extender of a new energy mining truck, used to execute an intelligent control method for a range extender of a new energy mining truck as described in any one of claims 1 to 9, characterized in that: include: Battery SOC reading module: used to read the battery SOC information in real time; Range extender efficient operation interval setting module: used to set the efficient operation interval of the range extender; Throttle and brake pedal depth reading module: used to read the depth information of the throttle and brake pedals in real time; Battery charge and discharge power calculation module: generates a first charging power according to the battery SOC and the charge and discharge power allowed by the battery; A second charging power generating module: based on the first charging power, generating a second charging power through the high-efficiency operation range of the range extender; A third charging power fine-tuning module: fine-tuning the second charging power according to the accelerator and brake pedal depths and the actual power used by the electrical appliance to generate a third charging power; Range extender control module: controls the start and stop and working power of the range extender according to the third charging power.

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