Method, device and vehicle for charge and discharge balance of hybrid vehicle

Abstract

The present invention provides a method, device and vehicle for hybrid vehicle charge and discharge balance, the method for hybrid vehicle charge and discharge balance comprising the following steps: V Within, randomly select a motor power output value P M ; Get the motor power output value as P M When the generator emits P M The minimum fuel consumption required is C F ; When the engine output power is P E When P E＝ P V ‑P M , get the engine's P E Minimum fuel consumption required C E ; Get the fuel consumption of the generator C F Engine fuel consumption C E Sum C; reselect P M , after iterative calculation, we get C min At this time, the motor power output value is P Cmin ; Take the motor power output value as P Cmin To drive a hybrid vehicle. By selecting different P M , iterative calculation can be performed to obtain the power demand of vehicle acceleration while making C E With C F The sum C is the minimum value, which not only meets the power demand for vehicle acceleration, but also keeps the vehicle's fuel consumption at the lowest state.

Description

Technical Field

[0001] The present invention relates to the automobile manufacturing industry, and in particular to a method, a device and a vehicle for charge and discharge balance of a hybrid vehicle. Background Art

[0002] A hybrid vehicle is a vehicle whose driving system is composed of two or more single driving systems that can operate simultaneously. The driving power of the vehicle is provided by the single driving systems alone or together according to the actual driving state of the vehicle. Hybrid vehicles are generally referred to as oil-electric hybrid vehicles, which use traditional internal combustion engines (diesel engines or gasoline engines) and electric motors as power sources. Some engines are modified to use other alternative fuels, such as compressed natural gas, propane and ethanol fuel.

[0003] In the field of hybrid vehicles, when the vehicle is in a medium load state and the battery's SOC is low, the motor output powered by the battery is insufficient to support the power output demand, and the engine is needed to supplement the vehicle's power; at this time, the vehicle is powered by the motor and the engine, and the engine charges the battery through the generator at the same time. The energy loss of the engine charging the battery through the motor is greater than the energy loss of the engine providing power to the vehicle. Therefore, if the output power of the engine is not controlled to achieve a balance between battery charge and discharge, excessive fuel consumption will occur, reducing the overall endurance of the vehicle.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The present invention provides a method, a device and a vehicle for charge and discharge balance of a hybrid vehicle, so as to solve the technical problem in the prior art that the vehicle has high fuel consumption and affects the cruising range under medium load conditions.

[0006] In order to solve the above problems, the present invention provides a method for charge and discharge balancing of a hybrid vehicle, comprising the following steps:

[0007] The vehicle power requirement P V Within, randomly select a motor power output value P M ;

[0008] Get the motor power output value as P M When the generator emits P M The minimum fuel consumption required is C F ;

[0009] When the engine output power is P E When P E＝ P V -P M , get the engine's P EMinimum fuel consumption required C E ;

[0010] Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C;

[0011] Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ;

[0012] The motor power output is P Cmin to drive hybrid vehicles.

[0013] In this solution, the motor is powered by a battery, so the maximum output power of the motor can be inferred from the maximum power output value of the battery. By selecting a motor power output value P within the maximum output power of the motor, M It can keep the motor output power within the normal range to prevent errors in the calculation results. Because the motor power in the hybrid vehicle is also generated by the engine, the motor output power should be selected based on the lowest fuel consumption. Therefore, the motor power output value P is selected. M Calculate the fuel consumption of the generator at this time C E Engine fuel consumption C F When the sum of ... M When the power demand of vehicle acceleration is met, the fuel consumption of the vehicle is also kept within the current motor output power P M The lowest state when the motor is in the state of 100%; Since the power of the motor can be changed by the battery power supply and the torque command received by the motor itself, and the change of the motor power will affect the overall fuel consumption of the vehicle, it is necessary to select different values ​​of the motor power output value P M , and then perform iterative calculation to obtain the fuel consumption C of the generator while meeting the power demand of vehicle acceleration. F Engine fuel consumption C E The sum C is the minimum value, which not only meets the power demand for vehicle acceleration, but also makes the vehicle's fuel consumption at the lowest state. The vehicle's charge and discharge balance is achieved, and the fuel consumption of the vehicle is reduced when it meets the normal operation.

[0014] In a further preferred embodiment of the present invention, the motor power output value is obtained as P M When the generator emits P M The minimum fuel consumption required is C F include:

[0015] The motor power output value is calculated by the power generation efficiency of the generator and the power generation efficiency of the battery. M The minimum fuel consumption required by the generator is C F .

[0016] In a further preferred scheme of the present invention, the engine generates electricity through a motor, and the power generation efficiency of the engine can be obtained through the MCU in the motor, and the power generation efficiency of the battery can be obtained through the battery management system BMS built into the battery. Then, the output power of the current engine can be reversed by combining the power generation efficiency of the engine and the power generation efficiency of the battery, and then the fuel consumption of the engine at this time can be obtained, which is the minimum fuel consumption of the current engine.

[0017] In a further preferred embodiment of the present invention, the vehicle power requirement P V Obtained by the following steps:

[0018] Detecting the accelerator pedal opening and the current speed of the vehicle;

[0019] Obtain the vehicle's required power P based on the accelerator pedal opening and current vehicle speed V .

[0020] In this scheme, since the required power of the whole vehicle is provided by the motor and the engine, after obtaining the required power of the whole vehicle through the accelerator pedal opening and the current vehicle speed, the motor power output value can be calculated as P M When the engine needs the minimum fuel consumption P M .

[0021] In a further preferred embodiment of the present invention, the maximum power value of the motor is obtained by:

[0022] The maximum power output value of the battery is obtained through the BMS system in the battery. The battery powers the motor. After obtaining the motor loss, the maximum power output value of the motor can be calculated.

[0023] In a further preferred embodiment of the present invention, the motor power output value P is randomly selected at the maximum motor output power. M Including: Select the maximum motor output power as the motor power output value P M .

[0024] In a further preferred embodiment of the present invention, the motor power output value P is reselected. M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin include:

[0025] Reselect the motor power output value P M The motor power output value P selected last timeM The first preset percentage is less than 100%, and the C value is calculated;

[0026] Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with

[0027] When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations;

[0028] When the C value becomes relatively large, the P value of the motor power output value selected last time is M The C value is set to P Cmin .

[0029] In this solution, the selected motor power output value P M The minimum value of C is obtained by iterative calculation by gradually reducing it to 99% of the last selected motor power output value.

[0030] A second aspect of the present invention provides a device for charge and discharge balancing of a hybrid vehicle, comprising:

[0031] Controller, the controller is configured as:

[0032] The vehicle power requirement P V Within, randomly select a motor power output value P M ;

[0033] Get the motor power output value as P M When the generator emits P M The minimum fuel consumption required is C F ;

[0034] When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ;

[0035] Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C;

[0036] Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ;

[0037] The motor power output is P Cmin to drive hybrid vehicles.

[0038] In a further preferred embodiment of the present invention, a sensor group is further included, the sensor group is used to detect the SOC of the battery, detect the opening of the accelerator pedal, and detect the current speed of the vehicle;

[0039] The controller is also configured to:

[0040] Reselect the motor power output value P M The motor power output value P selected last time M The first preset percentage is less than 100%, and the C value is calculated;

[0041] Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with

[0042] When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations;

[0043] When the C value becomes relatively large, the P value of the motor power output value selected last time is M The C value is set to P min .

[0044] In addition, the present invention also provides a vehicle for hybrid vehicle charge and discharge balancing, including a hybrid vehicle charge and discharge balancing device.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention provides a method, device and vehicle for hybrid vehicle charge and discharge balance, the method for hybrid vehicle charge and discharge balance comprising the following steps: V Within, randomly select a motor power output value P M ; Get the motor power output value as P M When the generator emits P M The minimum fuel consumption required is C F ; When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ; Get the fuel consumption of the generator C F Engine fuel consumption C E Sum C; reselect P M , after iterative calculation, we get C min At this time, the motor power output value is P Cmin ; Take the motor power output value as PCmin To drive a hybrid vehicle. By selecting different P M , iterative calculation can be performed to obtain the power demand of vehicle acceleration while making C E With C F The sum C is the minimum value, which not only meets the power demand for vehicle acceleration, but also keeps the vehicle's fuel consumption at the lowest state.

[0047] Other features and advantages of the embodiments of the present invention will be described in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A flow chart of a method for charge and discharge balancing of a hybrid vehicle provided in one embodiment of the present invention;

[0050] Figure 2 For the embodiment of the present invention Figure 1 Schematic diagram of the process of S100;

[0051] Figure 3 For the embodiment of the present invention Figure 1 Schematic diagram of the process flow of S400;

[0052] Figure 4 A schematic diagram of a hybrid vehicle charge-discharge balance device structure provided by one embodiment of the present invention; and

[0053] Figure 5 A schematic structural diagram of a hybrid vehicle with balanced charge and discharge provided in one embodiment of the present invention.

[0054] Reference numerals

[0055] 100. Vehicles used for charging and discharging balance of hybrid vehicles;

[0056] 101. Device for charge and discharge balance of hybrid vehicles;

[0057] 1011. Controller; 1012. Sensor group. DETAILED DESCRIPTION

[0058] In order to make the above and other features and advantages of the present invention more clear, the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0061] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0062] It should be noted that, in practical applications, the hybrid vehicle charging and discharging balancing method provided in this application is mainly used in the vehicle under medium load, that is, when the SOC is low and the motor output is insufficient to support the power output demand, the engine supplements the power.

[0063] Before executing the following steps, the battery SOC should be monitored by the BMS (Battery Management System) installed in the battery, the accelerator pedal opening should be detected by the torque sensor at the accelerator pedal, and the current speed of the vehicle should be detected. When the battery SOC, the accelerator pedal opening, and the current speed of the vehicle are within the set range, that is, the battery SOC is lower than the system preset value, it is determined that the battery power is low; when the accelerator pedal opening and the current speed of the vehicle are within the system preset range, it can be determined that the vehicle is currently in a medium load state. At this time, the method provided in this application can be used to save fuel consumption and improve the overall vehicle endurance. The technical solution of the present invention is also intended to solve this problem.

[0064] like Figure 1-3 As shown, the present invention provides a method for charging and discharging balance of a hybrid vehicle, comprising the following steps:

[0065] S100: The vehicle requires power P V Within, randomly select a motor power output value P M ;

[0066] S200: Get the motor power output value as P M When the generator emits P M The minimum fuel consumption required is C F ;

[0067] S300: When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ;

[0068] S400: Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C;

[0069] S500: Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ;

[0070] S600: The motor power output is P Cmin to drive hybrid vehicles.

[0071] It can be understood that the above steps S100 to S600 are based on automatic intervention control when the vehicle enters a medium load state, and the most suitable motor power output value is found, thereby improving the overall endurance and saving fuel consumption.

[0072] Based on a general inventive concept, the embodiment of the present invention calculates the fuel consumption C of the generator by randomly selecting the motor power for pre-calculation. F Engine fuel consumption C E The sum C is used to iterate and calculate the motor power continuously until the most suitable motor power output value is found as the target output.

[0073] Each step is described below through specific embodiments:

[0074] Please continue reading Figure 2 In step S100, the embodiment of the present invention provides a feasible solution, which can be implemented by the following two steps:

[0075] S101: Obtaining the maximum value of the motor output power according to the maximum power output value of the battery;

[0076] S102: Select a motor power output value P within the maximum motor output power. M ;

[0077] The maximum power output value of the battery is obtained through the BMS system in the battery. The battery powers the motor. After obtaining the motor loss, the maximum power output value of the motor can be calculated.

[0078] After determining the maximum output power of the motor, the maximum output power of the motor is generally selected as the motor power output value P. M You can also divide the motor output power into equal proportions and select the minimum value as the selected motor power output value P M , and then repeatedly select the motor power output value P in the iterative calculation M When selecting the motor power output value P M Large value.

[0079] See also Figure 3 , the motor power output value is obtained in S200 as P M The minimum fuel consumption required by the engine is C E Including the following two types:

[0080] In a feasible solution of the embodiment of the present invention, the motor power output value can be calculated by the power generation efficiency of the engine and the power generation efficiency of the battery as P M The minimum fuel consumption required by the engine is C EThe engine generates electricity through the motor. The MCU in the motor can obtain the power generation efficiency of the engine, and the battery management system BMS built into the battery can obtain the power generation efficiency of the battery. Then, the current engine output power can be inferred by combining the motor power with the engine power generation efficiency and the battery power generation efficiency, and then the engine fuel consumption at this time can be obtained, which is the current engine's minimum fuel consumption.

[0081] In another feasible solution provided by the embodiment of the present invention, step S200 may include:

[0082] The battery SOC, the accelerator pedal opening, and the current vehicle speed are detected by sensors;

[0083] Obtain the vehicle's required power P based on the accelerator pedal opening and current vehicle speed V ;

[0084] The power required by the vehicle P V Subtract the motor power output value P M Then the engine output power P is obtained E ;

[0085] The engine output power is P E The corresponding fuel consumption value is the minimum fuel consumption C E .

[0086] Since the required power of the vehicle is provided by the motor and the engine, after obtaining the required power of the vehicle through the accelerator pedal opening and the current vehicle speed, the motor power output value can be calculated as P M When the engine needs the minimum fuel consumption P M .

[0087] S300 is further executed, that is, the motor power output value is P M Under the condition of F Engine fuel consumption C E The sum C;

[0088] It is understandable that the power of the motor in a series-parallel hybrid vehicle is also generated by the engine, so the choice of the motor output power needs to consider the lowest fuel consumption. The engine output power needs to meet the total demand of vehicle operation, so only the generator fuel consumption C F Engine fuel consumption C E When the sum C is at its minimum, the vehicle's power demand for acceleration is met and the vehicle's fuel consumption is at its lowest.

[0089] Randomly select the motor power output value P at the maximum motor output power M Including: Select the maximum motor output power as the motor power output value PM .

[0090] Further, step S400 is executed to select a new motor power output value P. M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin .

[0091] In an optional solution of step S400, the following steps may be included:

[0092] S401: Reselect the motor power output value P M The motor power output value P selected last time M The first preset percentage is less than 100%, and the C value is calculated;

[0093] S402: Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with

[0094] S403: When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations;

[0095] S404: When the C value becomes relatively large, the P value of the motor power output value selected last time is M The C value is set to P min .

[0096] For example, the maximum value of the motor output power is selected as the motor power output value P M Reselect the motor power output value P M The motor power output value P selected last time M 99% of the motor power output value. After calculating the C value, compare the current C value with the P value of the motor power output value selected last time. M When the C value becomes smaller, the motor power output value P is selected repeatedly. M Calculation is performed and the calculation is stopped when the C value becomes larger. At this time, the P of the motor power output value selected last time is M The C value is P Cmin .

[0097] Then execute S500: take the motor power output value as P Cmin to drive hybrid vehicles.

[0098] The vehicle controller executes the hybrid vehicle charge and discharge balance method, and selects the motor output power value P M , to calculate the C value, and iteratively calculate the minimum value C of C min The vehicle controller then sends power to the motor with a value of P CminThe command meets the power demand of the vehicle's acceleration and also keeps the vehicle's fuel consumption at the lowest state. It achieves the balance of vehicle charging and discharging and reduces the fuel consumption of the vehicle when it meets normal operation.

[0099] In this solution, the motor is powered by a battery, so the maximum output power of the motor can be inferred from the maximum power output value of the battery. By selecting a motor power output value P within the maximum output power of the motor, M It can keep the motor output power within the normal range to prevent errors in the calculation results. Because the motor power in the hybrid vehicle is also generated by the engine, the motor output power should be selected based on the lowest fuel consumption. Therefore, the motor power output value P is selected. M Calculate the fuel consumption of the generator at this time C F Engine fuel consumption C E When the sum of ... M When the power demand of vehicle acceleration is met, the fuel consumption of the vehicle is also kept within the current motor output power P M The lowest state when the motor is in the state of 100%; Since the power of the motor can be changed by the battery power supply and the torque command received by the motor itself, and the change of the motor power will affect the overall fuel consumption of the vehicle, it is necessary to select different values ​​of the motor power output value P M , and then perform iterative calculation to obtain the fuel consumption C of the generator while meeting the power demand of vehicle acceleration. F Engine fuel consumption C E The sum C is the minimum value, which not only meets the power demand for vehicle acceleration, but also makes the vehicle's fuel consumption at the lowest state. The vehicle's charge and discharge balance is achieved, and the fuel consumption of the vehicle is reduced when it meets the normal operation.

[0100] See also Figure 4 , Figure 4 A schematic diagram of a hybrid vehicle charge-discharge balance device structure provided in one embodiment of the present invention, a hybrid vehicle charge-discharge balance device 101, comprising:

[0101] The controller 1011 is configured to:

[0102] The vehicle power requirement P V Within, randomly select a motor power output value P M ;

[0103] Get the motor power output value P M When the generator emits P M The minimum fuel consumption required is C F ;

[0104] When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ;

[0105] Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C;

[0106] Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ;

[0107] The motor power output is P Cmin to drive hybrid vehicles.

[0108] In a further preferred embodiment of the present invention, a sensor group 1012 is further included, and the sensor group 1012 is used to detect the SOC of the battery, the opening of the accelerator pedal, and the current speed of the vehicle;

[0109] The controller 1011 is also configured to:

[0110] Reselect the motor power output value P M The motor power output value P selected last time M The first preset percentage is less than 100%, and the C value is calculated;

[0111] Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with

[0112] When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations;

[0113] When the C value becomes relatively large, the P value of the motor power output value selected last time is M The C value is set to P min .

[0114] In actual use, the controller includes the vehicle controller and separate controllers in the motor, engine and generator. The sensor group includes at least a sensor for detecting the accelerator pedal, a sensor for basic battery information, a vehicle speed sensor, a motor speed sensor and other parameter sensors.

[0115] like Figure 5 As shown, Figure 5This is a schematic structural diagram of a hybrid vehicle charge-discharge balancing vehicle provided by one embodiment of the present invention. The embodiment of the present invention also provides a vehicle 100 for hybrid vehicle charge-discharge balancing, including a hybrid vehicle charge-discharge balancing device 101.

[0116] Furthermore, those skilled in the art should understand that if a device and a vehicle for charge and discharge balance of a hybrid vehicle provided by an embodiment of the present invention are combined and replaced by means of fusion, simple change, mutual conversion, etc., all or part of the sub-modules involved, such as the components are placed and moved; or the product they constitute is set as an integral whole; or a detachable design; all the combined components can form a device / device / system with specific functions, and using such a device / device / system to replace the corresponding components of the present invention also falls within the protection scope of the present invention.

[0117] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0118] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that the flowcharts and / or block diagrams can be implemented by computer program instructions.

[0119] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for charging and discharging balance of a hybrid vehicle, It is characterized in that The following steps are involved: The vehicle power requirement P V Within, randomly select a motor power output value P M ; Get the motor power output value P M When the generator emits P M The minimum fuel consumption required is C F ; When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ; Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C; Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ; The motor power output is P Cmin to power hybrid vehicles; The randomly selected motor power output value P M include: Obtain the maximum value of the motor output power according to the maximum power output value of the battery; Randomly select a motor power output value P within the maximum motor output power M ; The motor power output value P is randomly selected at the maximum motor output power value M Including: Select the maximum motor output power as the motor power output value P M ; The motor power output value P is reselected M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin include: Reselect the motor power output value P M The motor power output value P selected last time M A first preset percentage of , wherein the first preset percentage is less than 100%, and a C value is calculated; Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations; When the C value becomes relatively large, the P value of the motor power output value selected last time will be M The C value is set to P Cmin .

2. A method for charge and discharge balancing of a hybrid vehicle according to claim 1, It is characterized in that The motor power output value is obtained as P M When the generator emits P M The minimum fuel consumption required is C F include: The motor power output value is calculated by the power generation efficiency of the generator and the power generation efficiency of the battery. M The minimum fuel consumption required by the generator is C F .

3. A method for hybrid vehicle charge and discharge balancing according to claim 1, It is characterized in that The vehicle required power P V Obtained by the following steps: Detecting the accelerator pedal opening and the current speed of the vehicle; Obtain the vehicle's required power P based on the accelerator pedal opening and current vehicle speed V .

4. A method for hybrid vehicle charge and discharge balancing according to claim 3, It is characterized in that The maximum power value of the motor is obtained by: The maximum power output value of the battery is obtained through the BMS system in the battery. The battery powers the motor. After obtaining the motor loss, the maximum power output value of the motor can be calculated.

5. A device for charge and discharge balancing of a hybrid vehicle, It is characterized in that include: A controller, the controller being configured to: The vehicle power requirement P V Within, randomly select a motor power output value P M ; Get the motor power output value P M When the generator emits P M The minimum fuel consumption required is C F ; When the engine output power is P E When P E＝ P V -P M , get the engine's P E Minimum fuel consumption required C E ; Get the fuel consumption of the generator C F Engine fuel consumption C E The sum C; Reselect the motor power output value P M , after iterative calculation, we can get the minimum value C min At this time, the motor power output value is P Cmin ; The motor power output is P Cmin to drive a hybrid vehicle; including a sensor group, the sensor group is used to detect the SOC of the battery, detect the accelerator pedal opening, and detect the current speed of the vehicle; The controller is also configured to: Reselect the motor power output value P M The motor power output value P selected last time M A first preset percentage of , wherein the first preset percentage is less than 100%, and a C value is calculated; Compare the current C value with the P value of the last selected motor power output value. M The C value is compared with When the C value becomes relatively small, the motor power output value P is selected cyclically. M Perform calculations; When the C value becomes relatively large, the P value of the motor power output value selected last time will be M The C value is set to P min .

6. A vehicle for charge and discharge balancing of a hybrid vehicle, It is characterized in that It includes a charge and discharge balancing device for a hybrid vehicle as described in claim 5.

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