Power distribution control method and system for extended-range hybrid vehicle and extended-range hybrid vehicle

Abstract

The invention discloses a power distribution control method and system of an extended-range hybrid vehicle and the extended-range hybrid vehicle. The power distribution control method of the extended-range hybrid vehicle comprises the steps that the output power range and the efficient working range of the extended-range system are obtained; acquiring the required power of the extended-range hybrid vehicle, the residual electric quantity of the battery and the charging and discharging capacity of the battery in real time; judging a preset working interval of the range extending system according to the residual electric quantity of the battery; different preset working intervals correspond to different ranges of residual electric quantity of the battery; and in different preset working intervals, different power distribution strategies are adopted to control the output power of the range extending system according to the size relation among the required power of the range extending hybrid vehicle, the output power range and the efficient working range of the range extending system and the charging and discharging capacity of the battery. The problem that an existing hybrid extended-range vehicle is high in energy consumption is solved, and the economical efficiency of the vehicle during operation is improved.

Description

Technical Field

[0001] The present invention relates to the field of hybrid technology, and in particular to a power distribution control method, system and range-extended hybrid vehicle. Background Technology

[0002] In recent years, with the widespread use of mining trucks in mining operations, problems such as high energy consumption and poor emissions have emerged. Given these issues, developing energy-saving hybrid new energy vehicle technology has become the most effective solution to the problems of mining trucks, with a focus on developing electric and hybrid technologies.

[0003] Hybrid technology combines the advantages of engine and electric technologies. Hybrid electric vehicles (HEVs), typically represented by gasoline-electric hybrid technology, offer the low emissions and energy savings of electric vehicles while retaining the long range of engine-powered vehicles, leading to their widespread application in the automotive industry. However, current range-extended hybrid mining trucks suffer from incomplete power distribution technology. When facing the unique working conditions of mining trucks, the range-extending systems of existing hybrid range-extended mining trucks operate inefficiently for most of the time, resulting in high energy consumption and consequently lower economic efficiency during operation. Summary of the Invention

[0004] This invention provides a power distribution control method, system, and range-extended hybrid vehicle to solve the problem of high energy consumption in existing hybrid range-extended vehicles and improve the economic efficiency of vehicle operation.

[0005] In a first aspect, embodiments of the present invention provide a power distribution control method for a range-extended hybrid vehicle, the range-extended hybrid vehicle including a range-extending system and a battery, the power distribution control method for the range-extended hybrid vehicle including:

[0006] Obtain the output power range and high-efficiency operating range of the range extender system;

[0007] The required power of the range-extended hybrid vehicle, the remaining battery power, and the battery charging and discharging capacity are obtained in real time.

[0008] The preset operating range of the range extender system is determined based on the remaining charge of the battery; wherein, the range extender system includes multiple preset operating ranges, and different preset operating ranges correspond to different ranges of the remaining charge of the battery;

[0009] In different preset operating ranges, different power allocation strategies are adopted to control the output power of the range-extended hybrid system based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

[0010] Secondly, embodiments of the present invention also provide a power distribution control system for a range-extended hybrid vehicle. The power distribution control system is used to execute the power distribution control method for a range-extended hybrid vehicle as described in any embodiment of the present invention, including:

[0011] The first information acquisition module is used to acquire the output power range and high-efficiency operating range of the range extender system;

[0012] The second information acquisition module is used to acquire in real time the power demand of the range-extended hybrid vehicle, the remaining power of the battery, and the charging and discharging capacity of the battery.

[0013] An interval determination module is used to determine the preset operating interval of the range extender system based on the remaining power of the battery; wherein, the range extender system includes multiple preset operating intervals, and different preset operating intervals correspond to different ranges of the remaining power of the battery;

[0014] The power control module is used to control the output power of the range-extended hybrid system by adopting different power allocation strategies in different preset operating ranges, based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

[0015] Thirdly, embodiments of the present invention also provide a range-extended hybrid vehicle, the range-extended hybrid vehicle including a range-extending system, a battery, and a power distribution control system for the range-extended hybrid vehicle described in the embodiments of the present invention.

[0016] This invention provides a power distribution control method, system, and vehicle for range-extended hybrid vehicles. The range-extended hybrid vehicle includes a range-extending system and a battery. The power distribution control method acquires the output power range and efficient operating range of the range-extending system, and obtains in real time the power demand of the range-extended hybrid vehicle, the remaining battery charge, and the battery's charge / discharge capacity. Based on the remaining battery charge, a preset operating range for the range-extending system is determined. Different remaining battery charges correspond to different preset operating ranges. Within different preset operating ranges, different power distribution strategies are adopted to control the output power of the range-extending system according to the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extending system, and the battery's charge / discharge capacity. This addresses the high energy consumption problem of existing hybrid range-extended vehicles, enabling the range-extending system to operate within its efficient operating range as much as possible, improving the power generation conversion efficiency of the range-extending system, avoiding frequent high-power and idling engine operation, extending engine life, and improving the vehicle's economic efficiency during operation. Attached Figure Description

[0017] Figure 1A flowchart illustrating a power distribution control method for a range-extended hybrid vehicle provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the characteristic curves of the range extender system provided in an embodiment of the present invention;

[0019] Figure 3 A flowchart of another power distribution control method for a range-extended hybrid vehicle provided in an embodiment of the present invention;

[0020] Figure 4 A flowchart of the power distribution control process of the range extender system in the second preset working range provided in an embodiment of the present invention;

[0021] Figure 5 A flowchart of the power distribution control process of the range extender system in the third preset working range provided in an embodiment of the present invention;

[0022] Figure 6 A flowchart of a power distribution control method for a range extender system provided in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the power distribution control system for a range-extended hybrid vehicle provided in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0025] This invention provides a power distribution control method for range-extended hybrid vehicles, which can be applied to range-extended hybrid vehicles to ensure that the range-extending system operates within its most efficient range, improving the power generation conversion efficiency of the range-extending system, avoiding frequent high-power, idling operation of the engine, extending engine life, and improving vehicle operating economy. The power distribution control method for range-extended hybrid vehicles can be executed by the power distribution control system of the range-extended hybrid vehicle in this invention embodiment. Figure 1 A flowchart of a power distribution control method for a range-extended hybrid vehicle provided in an embodiment of the present invention is shown below. Figure 1 As shown, the power distribution control method for hybrid vehicles includes:

[0026] S110: Obtain the output power range and efficient operating range of the range extender system.

[0027] Among them, a range-extended hybrid vehicle is an electric vehicle that charges its battery through a range-extending system. The range-extending system and battery provide power to the vehicle, and the range-extending system charges the battery when it is low on power. In this embodiment of the invention, the range-extended hybrid vehicle can be a range-extended hybrid mining truck. Existing range-extended hybrid mining trucks' power distribution functions are primarily designed based on driving conditions and lack strategies developed for mining conditions (fully loaded uphill, empty downhill, fully loaded downhill, empty downhill). To improve the conversion efficiency of oil-fired power generation and meet the stable power demand of mining trucks, this embodiment of the invention provides a power distribution control method for range-extended hybrid vehicles. This method can increase the operating time of the range-extending system in its high-efficiency zone.

[0028] The output power range of the range extender system is the range between the maximum and minimum power that the range extender system can output. The efficient operating range of the range extender system is the range in which the range extender system can achieve a large output power with a small fuel consumption. In other words, the efficient operating range of the range extender system is the range in which the range extender system works with high efficiency. The efficient operating range of the range extender system can be preset according to the output characteristics of the range extender system. Figure 2 This is a schematic diagram of the characteristic curves of the range extender system provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the horizontal axis of the characteristic curve of the range extender system represents the output power pout of the range extender system, and the vertical axis represents the operating efficiency u of the range extender system. The operating efficiency and output power of the range extender system have a relationship similar to a normal distribution. The output power range of the range extender system is [pmin, pmax], where pmin and pmax are the minimum power of the range extender system. The efficient operating range of the range extender system is [peffx1, peffmax], where peffx1 is the minimum efficient power of the range extender system, and the operating efficiency of the range extender system here is u1. peffx2 is the maximum efficient power of the range extender system, and the operating efficiency of the range extender system here is umax. peffmax is the maximum efficient power of the range extender system, and the operating efficiency of the range extender system here is u2.

[0029] Specifically, by obtaining the output power range and efficient operating range of the range-extending system of the range-extending hybrid vehicle, and based on this range-extending system, it is possible to control the range-extending system to operate in the efficient range as much as possible, and ensure that the output power of the range-extending system can meet the power demand of the range-extending hybrid vehicle and the charging of the battery. This will improve the power generation conversion efficiency of the range-extending system, avoid frequent high-power and idling operation of the engine, and extend the engine's service life.

[0030] S120: Real-time acquisition of the power demand of the range-extended hybrid vehicle, the remaining battery charge, and the battery charging and discharging capacity.

[0031] The power demand of a range-extended hybrid vehicle refers to the power required by the vehicle at that time. This power demand varies depending on the operating conditions. The remaining battery capacity can be represented by the State of Charge (SOC) value, which is the ratio of the battery's current remaining capacity to its rated capacity, usually expressed as a percentage. The battery's charge / discharge capacity includes both its discharge and charge capabilities. Different batteries have corresponding discharge and charge capabilities based on their remaining capacity. The battery's discharge capability can be defined as its maximum discharge power, and its charge capability as its maximum charge power.

[0032] Specifically, by acquiring the power demand of the range-extended hybrid vehicle, the remaining battery charge, and the battery's charging and discharging capacity in real time, the operating range of the range-extending system can be determined based on the remaining battery charge, as well as whether the battery needs to be charged. This balances the power demand of the range-extended hybrid vehicle, the battery's charging and discharging characteristics, and the efficiency of the range-extending system, controlling the range-extending system to operate within its most efficient range as much as possible, avoiding frequent start-stop and inefficient operation of the range-extending system, and extending the system's lifespan.

[0033] S130. Determine the preset operating range of the range extender system based on the remaining battery power; wherein, the range extender system includes multiple preset operating ranges, and different preset operating ranges correspond to different ranges of remaining battery power.

[0034] Specifically, the range extender system includes multiple preset operating ranges. Different preset operating ranges correspond to different ranges of remaining battery power. The preset operating range of the range extender system can be determined based on the remaining battery power, thereby controlling the output power of the range extender system under different preset operating ranges.

[0035] S140. In different preset operating ranges, different power allocation strategies are adopted to control the output power of the range-extended hybrid system based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

[0036] Specifically, within different preset operating ranges, different power allocation strategies are adopted to control the output power of the range-extended hybrid system based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and high-efficiency operating range of the range-extended system, and the charging and discharging capacity of the battery. For example, the preset operating ranges may include a pure electric operating range, an upper high-efficiency range, a lower high-efficiency range, and a charging range. In the charging operating range, the output power of the range-extended system is 0. In the upper high-efficiency range, the output power of the range-extended system can be within the high-efficiency operating range, with the battery assisting in operation. When the sum of the maximum high-efficiency power of the range-extended system and the battery's discharge capacity is less than or equal to the vehicle's power demand, the battery operates at full power. The range-extended system operating at high-efficiency power can no longer meet the vehicle's needs; therefore, the output power of the range-extended system should be equal to the difference between the power demand of the range-extended hybrid vehicle and the battery's discharge capacity. This embodiment of the invention takes into account the power demand of the range-extended hybrid vehicle, the battery's charging and discharging characteristics, and the efficiency of the range-extended system, controlling the range-extended system to operate within the high-efficiency operating range as much as possible, avoiding frequent start-stop cycles and inefficient operation, extending the lifespan of the range-extended system, and improving the economic efficiency of vehicle operation.

[0037] This invention provides a power distribution control method for range-extended hybrid vehicles. The range-extended hybrid vehicle includes a range-extending system and a battery. The method acquires the output power range and efficient operating range of the range-extending system, and obtains in real-time the vehicle's required power, the remaining battery charge, and the battery's charge / discharge capacity. Based on the remaining battery charge, a preset operating range for the range-extending system is determined. Different remaining battery charges correspond to different preset operating ranges. Within these ranges, different power distribution strategies are adopted to control the output power of the range-extending system based on the relationship between the vehicle's required power, the range-extending system's output power range and efficient operating range, and the battery's charge / discharge capacity. This addresses the high energy consumption problem of existing hybrid range-extended vehicles, ensuring the range-extending system operates within its efficient operating range as much as possible, improving the power generation conversion efficiency of the range-extending system, avoiding frequent high-power and idling engine operation, extending engine life, and improving vehicle operating economy.

[0038] This invention also provides another power distribution control method for range-extended hybrid vehicles. In this embodiment, the preset working interval includes at least a first preset working interval, a second preset working interval, a third preset working interval, and a fourth preset working interval. Figure 3 A flowchart of another power distribution control method for a range-extended hybrid vehicle provided in an embodiment of the present invention is shown below. Figure 3 As shown, within different preset operating ranges, based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery, different power allocation strategies are adopted to control the output power of the range-extended system, including:

[0039] S210. When the remaining battery charge is in the first preset operating range, the power required by the range-extended hybrid vehicle is provided by the battery, and the output power of the range-extending system is 0.

[0040] Specifically, when the battery has a relatively high remaining charge in the first preset operating range, its charging capacity is low. To prevent overcharging, the battery is used to provide all the power required by the range-extended hybrid vehicle within the first preset operating range. The range-extending system typically does not participate in the power supply, and its output power is 0.

[0041] S220. When the remaining battery charge is in the second preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency operating range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle.

[0042] Specifically, when the remaining battery power is in the second preset operating range, the remaining battery power is relatively high. At this time, the battery's discharge capacity is strong, while its charging capacity is average. The range extender system operates within its efficient operating range as much as possible, with the battery providing almost continuous auxiliary power. The output power of the range extender system is controlled based on the relationship between the range extender system's output power range and efficient operating range, the battery's charging and discharging capacity, and the power requirements of the range extender hybrid vehicle.

[0043] S230 When the remaining battery charge is within the third preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency operating range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle.

[0044] Specifically, when the remaining battery power is in the third preset working range, the remaining battery power is in the medium range. At this time, the battery's charging and discharging capabilities are relatively strong, and the range extender system operates within the efficient working range as much as possible. The battery takes into account both power generation and energy storage. The output power of the range extender system is controlled according to the relationship between the output power range and efficient working range of the range extender system, the charging and discharging capabilities of the battery, and the power requirements of the range extender hybrid vehicle.

[0045] S240 When the remaining battery charge is within the fourth preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle.

[0046] Specifically, when the remaining battery power is in the third preset working range, the remaining battery power is in the low to medium range. At this time, the battery discharge capacity is average, the charging capacity is strong, and it may exert higher power to meet the equipment requirements. The battery is used for energy storage. The output power of the range extender system is controlled according to the output power range and high-efficiency working range of the range extender system, the relationship between the battery's charging and discharging capacity and the power required by the range extender hybrid vehicle.

[0047] Figure 4 A flowchart of the power distribution control process of the range extender system in the second preset working interval provided in an embodiment of the present invention is shown below. Figure 4 As shown, when the remaining battery charge is in the second preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle. This includes:

[0048] S310. When the remaining battery power is in the second preset operating range, if the sum of the maximum efficient power of the range extender system and the battery discharge capacity is less than or equal to the power required by the range extender hybrid vehicle, the output power of the battery is the battery discharge capacity, and the output power of the range extender system is the difference between the power required by the range extender hybrid vehicle and the battery discharge capacity.

[0049] Specifically, when the remaining battery charge is in the second preset operating range, and the sum of the high-efficiency maximum power of the range extender system and the battery discharge capacity is less than or equal to the power demand of the range-extended hybrid vehicle (i.e., peffmax + pdlim ≤ pload), the battery is operating at full power. The battery's output power is its discharge capacity. The range extender system operating at high efficiency power is insufficient to meet the vehicle's requirements. Therefore, the range extender system's output power should equal the difference between the equipment's power demand and the battery's discharge capacity (i.e., pout = pload - pdlim). Here, the range extender vehicle's power demand is pload, the range extender system's output power is pout, the battery's discharge capacity is pdlim, and the battery's charging capacity is pclim. The range extender system's output power range is [pmin, pmax], where pmin is the minimum power of the range extender system, pmax is the minimum power of the range extender system, and the high-efficiency operating range of the range extender system is [peffx1, peffmax], where peffx1 is the minimum high-efficiency power of the range extender system, peffx2 is the maximum high-efficiency power of the range extender system, and peffmax is the maximum high-efficiency power of the range extender system.

[0050] S320. When the remaining battery charge is in the second preset operating range, if the high-efficiency maximum power of the range extender system is less than or equal to the power demand of the range extender hybrid vehicle, and the power demand of the range extender hybrid vehicle is less than the sum of the high-efficiency maximum power of the range extender system and the discharge capacity of the battery, the output power of the range extender system is the high-efficiency maximum power of the range extender system.

[0051] Specifically, when the remaining power of the battery is within the second preset working range, when the maximum efficient power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the sum of the maximum efficient power of the range extender system and the discharge capacity of the battery, that is, peffmax ≤ pload < peffmax + pdlim, at this time, the battery is in an auxiliary working state, the range extender system works at the maximum efficient power point, that is, pout = peffmax, and the output power of the range extender system is the maximum efficient power of the range extender system.

[0052] S330. When the remaining power of the battery is within the second preset working range, if the maximum efficient power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the maximum efficient power of the range extender system, the output power of the range extender system is the maximum efficient power of the range extender system.

[0053] Specifically, when the remaining power of the battery is within the second preset working range, if the maximum efficient power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the maximum efficient power of the range extender system, that is, peffx2 ≤ pload < peffmax, at this time, the battery is in an auxiliary working state, and the output power of the range extender system is the maximum efficient power of the range extender system, that is, pout = peffx2.

[0054] S34E0. When the remaining power of the battery is within the second preset working range, if the minimum power of the range extender system is equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the maximum efficient power of the range extender system, the output power of the range extender system is the required power of the range-extended hybrid vehicle.

[0055] Specifically, when the remaining power of the battery is within the second preset working range, if the minimum power of the range extender system is equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the maximum efficient power of the range extender system, that is, pmin ≤ pload < peffx2, at this time, the battery is in an auxiliary working state, the output power of the range extender system is the required power of the range-extended hybrid vehicle, and the range extender system works according to the required power of the range-extended hybrid vehicle, that is, pout = pload.

[0056] S350. When the remaining battery charge is in the second preset operating range, if the power demand of the range-extended hybrid vehicle is less than or equal to the minimum power of the range-extended system, the output power of the range-extended system is the minimum power of the range-extended system. The battery's charging and discharging capacity includes its discharging and charging capabilities. Different batteries have corresponding discharging and charging capabilities based on their remaining charge. The battery's discharging capability is its maximum discharging power, and its charging capability is its maximum charging power. The range-extended system's output power range includes its maximum and minimum power. The high-efficiency operating range of the range-extended system includes its minimum high-efficiency power, highest high-efficiency power, and highest high-efficiency power. The minimum power, minimum high-efficiency power, highest high-efficiency power, highest high-efficiency power, and maximum power of the range-extended system increase sequentially.

[0057] Specifically, when the remaining battery charge is in the second preset operating range, if the power demand of the range-extended hybrid vehicle is less than or equal to the minimum power of the range-extending system, i.e., pload≤peffmin, the battery is in auxiliary work state, the range-extending system does work at the minimum power of the range-extending system, and the output power of the range-extending system is the minimum power of the range-extending system, i.e., pout=peffmin.

[0058] In this embodiment of the invention, when the remaining battery power is in the second preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle. This balances the power demand of the range extender hybrid vehicle, the charging and discharging characteristics of the battery and the efficiency of the range extender system, and controls the range extender system to operate within the efficient operating range as much as possible. This increases the operating time of the range extender system within the efficient operating range, which helps to solve the problem of high energy consumption of range extender hybrid vehicles, improves the economy of vehicle operation, avoids frequent start-stop and inefficient operation of the range extender system, and extends the life of the range extender system.

[0059] Figure 5 A flowchart of the power distribution control process of the range extender system in the third preset working interval provided in the embodiments of the present invention is shown below. Figure 5 As shown, when the remaining battery charge is within the third preset operating range, the output power of the range extender system is controlled based on the relationship between the output power range and efficient operating range of the range extender system, the battery's charging and discharging capacity, and the power demand of the range extender hybrid vehicle. This includes:

[0060] S410. When the remaining battery power is within the third preset operating range, if the sum of the maximum efficient power of the range extender system and the battery discharge capacity is less than or equal to the power required by the range extender hybrid vehicle, the battery output power is the battery discharge capacity, and the range extender system output power is the difference between the power required by the range extender hybrid vehicle and the battery discharge capacity.

[0061] Specifically, when the remaining power of the battery is within the third preset working range, if the sum of the high-efficiency maximum power of the range extender system and the discharge capacity of the battery is less than or equal to the required power of the range-extended hybrid vehicle, that is, peffmax + pdlim ≤ pload, at this time the battery is doing work at full power, and the output power of the battery is the discharge capacity of the battery. The range extender system cannot meet the vehicle's requirements by doing work at high-efficiency power. Therefore, the output power of the range extender system should be equal to the difference between the equipment required power and the discharge capacity of the battery, that is, the output power of the range extender system is the difference between the required power of the range-extended hybrid vehicle and the discharge capacity of the battery, that is, pout = pload - pdlim.

[0062] S420. When the remaining power of the battery is within the third preset working range, if the high-efficiency maximum power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the sum of the high-efficiency maximum power of the range extender system and the discharge capacity of the battery, the output power of the range extender system is the highest efficiency power of the range extender system.

[0063] Specifically, when the remaining power of the battery is within the third preset working range, if the high-efficiency maximum power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the sum of the high-efficiency maximum power of the range extender system and the discharge capacity of the battery, that is, peffmax ≤ pload < peffmax + pdlim, at this time the battery is in the auxiliary work state, the range extender system does work at the highest efficiency power, and the output power of the range extender system is the highest efficiency power of the range extender system, that is, pout = peffmax.

[0064] S430. When the remaining power of the battery is within the third preset working range, if the highest efficiency power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the high-efficiency maximum power of the range extender system, determine the output power of the range extender system according to the charging capacity of the battery and the magnitude relationship between the difference between the high-efficiency maximum power of the range extender system and the required power of the range-extended hybrid vehicle.

[0065] Specifically, if the highest efficiency power of the range extender system is less than or equal to the required power of the range-extended hybrid vehicle, and the required power of the range-extended hybrid vehicle is less than the high-efficiency maximum power of the range extender system, that is, peffx2 ≤ pload < peffmax, the output power of the range extender system can be determined according to the charging capacity of the battery and the magnitude relationship between the difference between the high-efficiency maximum power of the range extender system and the required power of the range-extended hybrid vehicle, so as to further balance and take into account the required power of the range-extended hybrid vehicle, the charge-discharge characteristics of the battery and the efficiency of the range extender system, control the range extender system to operate in the high-efficiency working range as much as possible, and improve the economy of the vehicle during operation.

[0066] In some embodiments of the present invention, the output power of the range extender system is determined according to the relationship between the charging capacity of the battery and the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, including:

[0067] When the charging capacity of the battery is greater than or equal to the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, the output power of the range extender system is the high-efficiency maximum power of the range extender system, and the charging power of the battery is the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle.

[0068] When the charging capacity of the battery is less than the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, the output power of the range extender system is the difference between the high-efficiency maximum power of the range extender system and the charging capacity of the battery.

[0069] Specifically, when the charging capacity of the battery is sufficient, the charging capacity of the battery is greater than or equal to the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, that is, peffmax - pload ≤ pclim. The range extender system operates at the high-efficiency maximum power point, that is, the output power of the range extender system is the high-efficiency maximum power of the range extender system, that is, pout = peffmax. At this time, the battery absorbs and stores the excess power output by the range extender system, and the charging power of the battery is the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle.

[0070] When the charging capacity of the battery is insufficient, the charging capacity of the battery is less than the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, that is, peffmax - pload > pclim. The output power of the range extender system is the difference between the high-efficiency maximum power of the range extender system and the charging capacity of the battery, that is, pout = peffmax - pclim. At this time, the battery absorbs and stores the excess power output by the range extender system.

[0071] S440. When the remaining power of the battery is in the third preset working range, if the required power of the range extender hybrid vehicle is less than the highest efficiency power of the range extender system, the output power of the range extender system is determined according to the relationship between the charging capacity of the battery and the difference between the highest efficiency power of the range extender system and the required power of the range extender hybrid vehicle.

[0072] Specifically, when the remaining power of the battery is in the third preset working range, if the required power of the range extender hybrid vehicle is less than the highest efficiency power of the range extender system, that is, pload < peffx2, the output power of the range extender system is determined according to the relationship between the charging capacity of the battery and the difference between the highest efficiency power of the range extender system and the required power of the range extender hybrid vehicle, so as to further balance and take into account the required power of the range extender hybrid vehicle, the charge and discharge characteristics of the battery and the efficiency of the range extender system, control the range extender system to operate in the high-efficiency working range as much as possible, and improve the economy of the vehicle during operation.

[0073] In some embodiments of the present invention, the output power of the range extender system is determined based on the relationship between the battery's charging capacity and the difference between the most efficient power of the range extender system and the power demand of the range extender hybrid vehicle, including:

[0074] If the battery's charging capacity is greater than or equal to the difference between the range extender system's most efficient power and the range extender hybrid vehicle's required power, then the range extender system's output power is the range extender system's most efficient power, and the battery's charging power is the difference between the range extender system's most efficient power and the range extender hybrid vehicle's required power.

[0075] If the battery's charging capacity is less than the difference between the range extender system's most efficient power and the range extender hybrid vehicle's required power, the range extender system's output power is the difference between the range extender system's most efficient power and the battery's charging capacity.

[0076] Specifically, when the battery's charging capacity is sufficient, it is greater than or equal to the difference between the range extender system's most efficient power and the hybrid vehicle's required power, i.e., peffx² - pload ≤ pclim. The range extender system's output power is its most efficient power, and the battery absorbs and stores excess electricity from the system's output. The battery's charging power is the difference between the range extender system's most efficient power and the hybrid vehicle's required power. Conversely, when the battery's charging capacity is weak, it is less than the difference between the range extender system's most efficient power and the hybrid vehicle's required power, i.e., peffx² - pload > pclim. The range extender system's output power is the difference between its most efficient power and the battery's charging capacity, i.e., pout = peffx² - pclim. In this case, the battery absorbs and stores excess electricity from the range extender system's output.

[0077] In this embodiment of the invention, when the remaining battery power is within a third preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle. This balances the power demand of the range extender hybrid vehicle, the charging and discharging characteristics of the battery, and the efficiency of the range extender system, controlling the range extender system to operate within the efficient operating range as much as possible. This increases the operating time of the range extender system within the efficient operating range, which helps to solve the problem of high energy consumption in range extender hybrid vehicles, improves the economy of vehicle operation, avoids frequent start-stop and inefficient operation of the range extender system, and extends the life of the range extender system.

[0078] In some embodiments of the present invention, when the remaining battery charge is within a fourth preset operating range, the output power of the range extender system is controlled based on the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle, including:

[0079] When the remaining battery charge is within the fourth preset operating range, if the maximum efficient power of the range extender system is less than or equal to the power required by the range extender hybrid vehicle, the output power of the range extender system is the power required by the range extender hybrid vehicle.

[0080] When the remaining battery power is within the fourth preset operating range, if the power demand of the range-extended hybrid vehicle is less than the maximum efficient power of the range-extended system, and the charging capacity of the battery is less than the difference between the maximum efficient power of the range-extended system and the power demand of the range-extended hybrid vehicle, the output power of the range-extended system is the difference between the maximum efficient power of the range-extended system and the charging capacity of the battery.

[0081] Specifically, when the battery's remaining charge is within the fourth preset operating range, if the maximum efficient power of the range extender system is less than or equal to the power demand of the range-extended hybrid vehicle (peffmax ≤ pload), the output power of the range extender system is the power demand of the range-extended hybrid vehicle (pout = pload), and the range extender system performs work according to the power demand of the range-extended hybrid vehicle. In this case, the battery absorbs and stores the excess power output by the range extender system. Conversely, when the battery's remaining charge is within the fourth preset operating range, if the power demand of the range-extended hybrid vehicle is less than the maximum efficient power of the range extender system (pload < peffmax), and the battery's charging capacity is less than the difference between the maximum efficient power of the range extender system and the power demand of the range-extended hybrid vehicle, the battery's charging capacity is insufficient (peffmax - pload > pclim). In this case, the output power of the range extender system is the difference between the maximum efficient power of the range extender system and the battery's charging capacity (pout = peffmax - pclim), and the battery absorbs and stores the excess power output by the range extender system. If the power demand of the range-extended hybrid vehicle is less than the maximum efficient power of the range-extended system (pload < peffmax), and the battery's charging capacity is greater than or equal to the difference between the maximum efficient power of the range-extended system and the power demand of the range-extended hybrid vehicle, then the battery's charging capacity is sufficient (peffmax - pload ≤ pclim), and the output power of the range-extended system is the maximum efficient power of the range-extended system (pout = peffmax). In this case, the battery absorbs and stores the excess power output by the range-extended system. The method of this embodiment can increase the operating time of the range-extended system within its efficient operating range when the remaining battery power is within a fourth preset operating range, which helps to solve the problem of high energy consumption in range-extended hybrid vehicles and improves the economic efficiency of vehicle operation.

[0082] In some embodiments of the present invention, determining the preset operating range of the range extender system based on the remaining battery power includes:

[0083] When the remaining battery charge is (N1, 100], the range extender system operates in the first preset operating range; when the remaining battery charge is (N2, N1], the range extender system operates in the second preset operating range; when the remaining battery charge is (N3, N2], the range extender system operates in the third preset operating range; when the remaining battery charge is (N4, N3], the range extender system operates in the fourth preset operating range; wherein, N4 < N3 < N2 < N1 < 100.

[0084] Specifically, the remaining battery charge corresponding to the first preset working interval is (N1, 100], the remaining battery charge corresponding to the second preset working interval is (N2, N1], the remaining battery charge corresponding to the third preset working interval is (N3, N2], and the remaining battery charge corresponding to the fourth preset working interval is (N4, N3], where N4 < N3 < N2 < N1 < 100. N1, N2, N3, and N4 can be set according to the battery's charge and discharge characteristics. When the remaining battery capacity is (N1, N2), the battery has a strong discharge capacity but a moderate charging capacity. When the remaining battery capacity is (N3, N2), both the discharge and charging capacities are strong. When the remaining battery capacity is (N4, N3), the discharge capacity is moderate, but the charging capacity is strong. For example, the remaining battery capacity can be represented by 0 to 100, where 100 represents a fully charged battery and 0 represents a completely empty battery. N1 can be 90 or 95, N2 can be 60 or 65, N3 can be 30 or 35, and N4 can be 0.

[0085] In some embodiments of the present invention, the first preset working range is also referred to as the pure electric range, the second preset working range is also referred to as the high-efficiency upper half range, the third preset working range is also referred to as the high-efficiency lower half range, and the fourth preset working range is also referred to as the supplementary charging range. Figure 6 A flowchart of the power distribution control method for a range extender system provided in an embodiment of the present invention is shown below. Figure 6As shown, in the pure electric range, the output power pout of the range extender system is 0; in the upper half of the high-efficiency range, when peffmax + pdlim ≤ pload, the output power pout of the range extender system is pout = pload - pdlim, when peffmax ≤ pload < peffpluspdlim, the output power pout of the range extender system is pout = peffmax, when peffx2 ≤ pload < peffmax, the output power pout of the range extender system is pout = peffx2, when pmin ≤ pload < peffx2, the output power pout of the range extender system is pout = pload, when pload < peffmin, the output power pout of the range extender system is pout = peffmin; in the lower half of the high-efficiency range, when peffmax + pdlim ≤ pload, the output power pout of the range extender system is pout = pload - pdlim, when peffmax ≤ pload < peffmax + pdlim, the output power pout of the range extender system is pout = peffmax, when peffx2 ≤ pload < peffmax, it is divided into the following two cases: when peffmax - pload ≤ pclim, the output power pout of the range extender system is pout = peffmax, when peffmax - pload > pclim, the output power pout of the range extender system is pout = peffmax - pclim; in the lower half of the high-efficiency range, when peffmax - pload > pclim, the output power pout of the range extender system is pout = peffmax - pclim, when pload < peffx2, it is divided into the following two cases: when peffx2 - pload ≤ pclim, the output power pout of the range extender system is pout = peffx2, when peffx2 - pload > pclim, the output power pout of the range extender system is pout = peffx2 - pclim; in the charging range, when peffmax - pload ≤ pclim, the output power pout of the range extender system is pout = peffmax, when peffmax - pload > pclim, the output power pout of the range extender system is pout = peffmax - pclim.In this invention, the power demand of the range-extended hybrid vehicle is pload, the output power of the range-extending system is pout, the battery discharge capacity is pdlim, and the battery charging capacity is pclim. The output power range of the range-extending system is [pmin, pmax], where pmin and pmax are the minimum power of the range-extending system, and the efficient operating range of the range-extending system is [peffx1, peffmax], where peffx1 is the minimum efficient power, peffx2 is the maximum efficient power, and peffmax is the maximum efficient power. The power distribution control method for the range-extending system in this embodiment can increase the operating time of the range-extending system in the efficient range, which is beneficial for solving the problem of high energy consumption in range-extended hybrid vehicles and improving the economic efficiency of vehicle operation.

[0086] The power distribution control method for range-extended hybrid vehicles in this invention aims to achieve power distribution for these vehicles. Since the power demand of a vehicle during operation is relatively stable, the power distribution strategy developed for this stable operating condition allows the range-extending system to operate in its high-efficiency range as much as possible, thereby improving the conversion efficiency of diesel (methanol, biodiesel, gasoline, etc.) power generation. The charging and discharging capabilities of a battery vary across different ranges, and the conversion efficiency of the range extender has a certain curvilinear relationship with its own operating power. Furthermore, to avoid frequent high-power, idling engine operation and extend engine life, the power distribution control method for range-extended hybrid vehicles in this invention can increase the time the range-extending system operates in its high-efficiency range by approximately 20% compared to current power distribution strategies developed for driving conditions. This helps solve the high energy consumption problem of hybrid range-extended mining trucks and improves the economic efficiency of vehicle operation.

[0087] The power distribution control method for range-extended hybrid vehicles in this invention, compared with existing technologies, balances charging and discharging efficiency throughout mining operations, avoiding situations where the range extender system only intervenes when the battery is low on power. It can be applied to mining machinery using range-extended system vehicles. The intervention timing of the range extender system is determined by the remaining battery charge, matching it to the remaining battery capacity. In terms of economy, it not only achieves overall vehicle energy saving but also reduces unnecessary start-stop cycles, extending the lifespan of the range extender system. Regarding thermal management, it avoids the rapid temperature rise caused by continuous high-power battery discharge / charging, making it easier for the battery thermal management system to control the temperature within the ideal range, further improving battery reliability and safety.

[0088] This invention also provides a power distribution control system for a range-extended hybrid vehicle. This power distribution control system is used to execute the power distribution control method for a range-extended hybrid vehicle in any embodiment of this invention. Figure 7 This is a schematic diagram of the power distribution control system for a range-extended hybrid vehicle provided in an embodiment of the present invention, as shown below. Figure 7As shown, the power distribution control system of a range-extended hybrid vehicle includes:

[0089] The first information acquisition module 110 is used to acquire the output power range and high-efficiency operating range of the range extender system.

[0090] The second information acquisition module 120 is used to acquire the required power of the range-extended hybrid vehicle, the remaining battery power, and the battery charging and discharging capacity in real time.

[0091] The range determination module 130 is used to determine the preset working range of the range extender system based on the remaining battery power; wherein, the range extender system includes multiple preset working ranges, and different preset working ranges correspond to different ranges of the remaining battery power.

[0092] The power control module 140 is used to control the output power of the range-extended hybrid system by adopting different power distribution strategies in different preset operating ranges, based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

[0093] Specifically, the first information acquisition module 110 acquires the output power range and efficient operating range of the range extender system, while the second information acquisition module 120 acquires the power demand of the range-extended hybrid vehicle, the remaining battery charge, and the battery's charging and discharging capacity in real time. The interval judgment module 130 determines the preset operating range of the range extender system based on the remaining battery charge; the range extender system includes multiple preset operating ranges, each corresponding to a different range of remaining battery charge. The power control module 140, within each preset operating range, employs different power allocation strategies to control the output power of the range extender system based on the relationship between the power demand of the range extender vehicle, the output power range and efficient operating range of the range extender system, and the battery's charging and discharging capacity. This ensures the range extender system operates within its efficient operating range as much as possible, increasing the time it operates within this range, improving the power generation conversion efficiency of the range extender system, avoiding frequent high-power and idling engine operation, extending engine life, and improving the vehicle's operational economy.

[0094] This invention provides a power distribution control system for range-extended hybrid vehicles. The system uses a first information acquisition module to obtain the output power range and efficient operating range of the range-extended system, and a second information acquisition module to obtain the vehicle's required power, remaining battery charge, and battery charging / discharging capacity in real time. An interval determination module determines the preset operating range of the range-extended system based on the remaining battery charge; different remaining battery charges correspond to different preset operating ranges. Within these preset operating ranges, the power control module employs different power distribution strategies to control the output power of the range-extended system based on the relationship between the vehicle's required power, the range-extended system's output power range and efficient operating range, and the battery's charging / discharging capacity. This addresses the high energy consumption problem of existing hybrid range-extended vehicles, ensuring the range-extended system operates within its efficient operating range as much as possible, improving the power generation conversion efficiency of the range-extended system, avoiding frequent high-power and idling engine operation, extending engine life, and improving vehicle operating economy.

[0095] This invention also provides a range-extended hybrid vehicle, which includes a range-extending system, a battery, and a power distribution control system for the range-extended hybrid vehicle in this invention embodiment.

[0096] Specifically, the range-extended hybrid vehicle provided in this embodiment includes the power distribution control system for range-extended hybrid vehicles proposed in any of the above embodiments, and has the beneficial effects of the power distribution control system for range-extended hybrid vehicles proposed in the above embodiments, which will not be repeated here. For example, the range-extended hybrid vehicle can be a range-extended hybrid mining truck or other operating machinery or vehicle that uses a range-extending system.

[0097] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A power distribution control method for a range-extended hybrid vehicle, characterized in that, The range-extended hybrid vehicle includes a range-extending system and a battery, and the power distribution control method of the range-extended hybrid vehicle includes: Obtain the output power range and high-efficiency operating range of the range extender system; The required power of the range-extended hybrid vehicle, the remaining battery power, and the battery charging and discharging capacity are obtained in real time. The preset operating range of the range extender system is determined based on the remaining charge of the battery; wherein, the range extender system includes multiple preset operating ranges, and different preset operating ranges correspond to different ranges of the remaining charge of the battery; In different preset operating ranges, different power allocation strategies are adopted to control the output power of the range-extended hybrid system based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

2. The power distribution control method for range-extended hybrid vehicles according to claim 1, characterized in that, The preset operating range includes at least a first preset operating range, a second preset operating range, a third preset operating range, and a fourth preset operating range. Within different preset operating ranges, different power allocation strategies are adopted to control the output power of the range-extended hybrid system based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery. These strategies include: When the remaining charge of the battery is within the first preset working range, the power required by the range-extended hybrid vehicle is provided by the battery, and the output power of the range-extending system is 0. When the remaining charge of the battery is within the second preset working range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency working range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle. When the remaining charge of the battery is in the third preset working range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency working range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle. When the remaining charge of the battery is in the fourth preset working range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency working range of the range extender system, the charging and discharging capacity of the battery and the power demand of the range extender hybrid vehicle.

3. The power distribution control method for range-extended hybrid vehicles according to claim 2, characterized in that, When the remaining charge of the battery is within the second preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and efficient operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle, including: When the remaining charge of the battery is within the second preset operating range, if the sum of the maximum efficient power of the range extender system and the discharge capacity of the battery is less than or equal to the required power of the range extender hybrid vehicle, the output power of the battery is the discharge capacity of the battery, and the output power of the range extender system is the difference between the required power of the range extender hybrid vehicle and the discharge capacity of the battery. When the remaining charge of the battery is within the second preset operating range, if the high-efficiency maximum power of the range extender system is less than or equal to the power required by the range extender hybrid vehicle, and the power required by the range extender hybrid vehicle is less than the sum of the high-efficiency maximum power of the range extender system and the discharge capacity of the battery, the output power of the range extender system is the high-efficiency maximum power of the range extender system. When the remaining charge of the battery is within the second preset working range, if the maximum efficiency power of the range extender system is less than or equal to the required power of the range extender hybrid vehicle, and the required power of the range extender hybrid vehicle is less than the maximum efficiency power of the range extender system, the output power of the range extender system is the maximum efficiency power of the range extender system. When the remaining charge of the battery is within the second preset operating range, if the minimum power of the range extender system is equal to the required power of the range extender hybrid vehicle, and the required power of the range extender hybrid vehicle is less than the maximum efficiency power of the range extender system, the output power of the range extender system is the required power of the range extender hybrid vehicle. When the remaining charge of the battery is within the second preset operating range, if the power demand of the range-extended hybrid vehicle is less than or equal to the minimum power of the range-extending system, the output power of the range-extending system is the minimum power of the range-extending system. The battery's charge / discharge capacity includes its discharge capacity and charging capacity. Different batteries have corresponding discharge and charging capacities based on their remaining charge. The battery's discharge capacity is its maximum discharge power, and its charging capacity is its maximum charging power. The range extender system's output power range includes its maximum and minimum power. The range extender system's high-efficiency operating range includes its minimum high-efficiency power, maximum high-efficiency power, and maximum high-efficiency power. The minimum power, minimum high-efficiency power, maximum high-efficiency power, maximum high-efficiency power, and maximum power of the range extender system increase sequentially.

4. The power distribution control method for range-extended hybrid vehicles according to claim 3, characterized in that, When the remaining charge of the battery is within the third preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle, including: When the remaining charge of the battery is in the third preset working range, if the sum of the maximum efficient power of the range extender system and the discharge capacity of the battery is less than or equal to the required power of the range extender hybrid vehicle, the output power of the battery is the discharge capacity of the battery, and the output power of the range extender system is the difference between the required power of the range extender hybrid vehicle and the discharge capacity of the battery. When the remaining charge of the battery is in the third preset working range, if the maximum efficient power of the range extender system is less than or equal to the power required by the range extender hybrid vehicle, and the power required by the range extender hybrid vehicle is less than the sum of the maximum efficient power of the range extender system and the discharge capacity of the battery, the output power of the range extender system is the maximum efficient power of the range extender system. When the remaining charge of the battery is in the third preset working range, if the maximum efficiency power of the range extender system is less than or equal to the required power of the range extender hybrid vehicle, and the required power of the range extender hybrid vehicle is less than the maximum efficiency power of the range extender system, the output power of the range extender system is determined according to the relationship between the charging capacity of the battery and the difference between the maximum efficiency power of the range extender system and the required power of the range extender hybrid vehicle. When the remaining charge of the battery is in the third preset working range, if the power demand of the range-extended hybrid vehicle is less than the maximum efficiency power of the range-extended system, the output power of the range-extended system is determined according to the relationship between the charging capacity of the battery and the difference between the maximum efficiency power of the range-extended system and the power demand of the range-extended hybrid vehicle.

5. The power distribution control method for range-extended hybrid vehicles according to claim 4, characterized in that, The step of determining the output power of the range extender system based on the relationship between the charging capacity of the battery and the difference between the efficient maximum power of the range extender system and the power demand of the range extender hybrid vehicle includes: If the charging capacity of the battery is greater than or equal to the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle, the output power of the range extender system is the high-efficiency maximum power of the range extender system, and the charging power of the battery is the difference between the high-efficiency maximum power of the range extender system and the required power of the range extender hybrid vehicle. If the charging capacity of the battery is less than the difference between the high-efficiency maximum power of the range extender system and the power required by the range extender hybrid vehicle, the output power of the range extender system is the difference between the high-efficiency maximum power of the range extender system and the charging capacity of the battery.

6. The power distribution control method for a range-extended hybrid vehicle according to claim 4, characterized in that, The step of determining the output power of the range extender system based on the relationship between the battery's charging capacity and the difference between the range extender system's most efficient power and the power demand of the range extender hybrid vehicle includes: If the charging capacity of the battery is greater than or equal to the difference between the maximum efficiency power of the range extender system and the required power of the range extender hybrid vehicle, the output power of the range extender system is the maximum efficiency power of the range extender system, and the charging power of the battery is the difference between the maximum efficiency power of the range extender system and the required power of the range extender hybrid vehicle. If the charging capacity of the battery is less than the difference between the maximum efficiency power of the range extender system and the power required by the range extender hybrid vehicle, the output power of the range extender system is the difference between the maximum efficiency power of the range extender system and the charging capacity of the battery.

7. The power distribution control method for a range-extended hybrid vehicle according to claim 2, characterized in that, When the remaining charge of the battery is in the fourth preset operating range, the output power of the range extender system is controlled according to the relationship between the output power range and high-efficiency operating range of the range extender system, the charging and discharging capacity of the battery, and the power demand of the range extender hybrid vehicle, including: When the remaining charge of the battery is in the fourth preset working range, if the maximum efficient power of the range extender system is less than or equal to the required power of the range extender hybrid vehicle, the output power of the range extender system is the required power of the range extender hybrid vehicle. When the remaining charge of the battery is in the fourth preset operating range, if the power demand of the range-extended hybrid vehicle is less than the maximum efficient power of the range-extended system, and the charging capacity of the battery is less than the difference between the maximum efficient power of the range-extended system and the power demand of the range-extended hybrid vehicle, the output power of the range-extended system is the difference between the maximum efficient power of the range-extended system and the charging capacity of the battery.

8. The power distribution control method for a range-extended hybrid vehicle according to claim 1, characterized in that, Determining the preset operating range of the range extender system based on the remaining battery power includes: When the remaining charge of the battery is (N1, 100], the range extender system operates in the first preset working range. When the remaining charge of the battery is (N2, N1], the range extender system operates in the second preset working range. When the remaining charge of the battery is (N3, N2], the range extender system is in the third preset operating range; When the remaining charge of the battery is (N4, N3], the range extender system is in the fourth preset operating range; wherein, N4 < N3 < N2 < N1 < 100.

9. A power distribution control system for a range-extended hybrid vehicle, characterized in that, The power distribution control system of the range-extended hybrid vehicle is used to execute the power distribution control method of the range-extended hybrid vehicle according to any one of claims 1-8, including: The first information acquisition module is used to acquire the output power range and high-efficiency operating range of the range extender system; The second information acquisition module is used to acquire in real time the power demand of the range-extended hybrid vehicle, the remaining power of the battery, and the charging and discharging capacity of the battery. An interval determination module is used to determine the preset operating interval of the range extender system based on the remaining power of the battery; wherein, the range extender system includes multiple preset operating intervals, and different preset operating intervals correspond to different ranges of the remaining power of the battery; The power control module is used to control the output power of the range-extended hybrid system by adopting different power allocation strategies in different preset operating ranges, based on the relationship between the power demand of the range-extended hybrid vehicle, the output power range and efficient operating range of the range-extended system, and the charging and discharging capacity of the battery.

10. A range-extended hybrid vehicle, characterized in that, The range-extended hybrid vehicle includes a range-extending system, a battery, and a power distribution control system for the range-extended hybrid vehicle as described in claim 9.

Images