CN117261625A - Method and device for charging battery of range-extended hybrid vehicle and range-extended hybrid vehicle - Google Patents

Abstract

The embodiment of the disclosure provides a battery charging method and device for a range-extending hybrid vehicle and the range-extending hybrid vehicle, wherein the method comprises the steps of firstly determining the current state of a preset power limiting element, and determining the first power generation of an engine driving an ISG motor according to the current state of the preset limiting element; determining the residual power of the first power generation meeting the electric load of the vehicle, and determining the battery reference charging power based on the residual power; determining a correction coefficient to be used currently according to the current running condition of the vehicle and the window range of the battery SOC; and finally, correcting the reference charging power of the battery by adopting the correction coefficient to obtain the target charging power of the battery, and charging the battery. The charging efficiency is higher, the fuel consumption is reduced, and the energy is saved.

Description

Extended-range hybrid vehicle battery charging method and device and extended-range hybrid vehicle

Technical field

The present disclosure relates to the technical field of new energy vehicles, and in particular to a battery charging method and device for a range-extended hybrid vehicle, and a range-extended hybrid vehicle.

Background technique

New energy vehicles can be divided into pure electric vehicles and hybrid vehicles according to different power systems. The extended-range hybrid vehicle uses a diesel engine to drive a generator to generate electricity, and the traction motor and gearbox drive the entire vehicle. The power battery can be charged during driving and parking, and reverse charging can be achieved during downhill braking. This way , the diesel engine always runs in the high-efficiency zone, which can significantly reduce fuel consumption and save operating costs.

However, current charging solutions for power batteries from generators mostly use fixed-power charging methods. For example, during driving, a fixed power corresponding to driving is used to charge the power battery, and when parking, a fixed power corresponding to parking is used to charge the power battery. Charging, this charging method is not conducive to reducing fuel consumption and causes energy waste.

Contents of the invention

Embodiments of the present disclosure provide extended-range hybrid vehicle battery charging methods and devices and extended-range hybrid vehicles to solve the problem that the existing fixed power charging method is not conducive to reducing fuel consumption and causes energy waste.

Based on the above problems, in the first aspect, a method for charging a battery of an extended-range hybrid vehicle is provided, including:

When the engine of the vehicle drives the integrated starter generator ISG motor to generate electricity, the current state of the preset power limiting element of the vehicle is obtained, and it is determined based on the current state of the preset power limiting element that the engine drives the ISG The first generated power of the motor;

Based on the first generated power, obtain the remaining power after meeting the power demand of the vehicle's electrical load, and obtain the battery reference charging power based on the remaining power;

The correction coefficient is determined according to the current operating conditions of the vehicle and the window range of the battery state of charge SOC of the vehicle; wherein the correction coefficient is determined for the different window ranges of the battery SOC under different operating conditions of the vehicle. ;The window range is obtained by dividing the entire battery SOC window according to the preset division unit;

The battery reference charging power is corrected using the correction coefficient to obtain the battery target charging power, and the battery target charging power is used to charge the vehicle battery.

In any possible implementation combined with the first aspect, the preset power limiting factors include at least one of the following: engine water temperature, maximum available power generation of the ISG motor, and vehicle fault status.

In any possible implementation combined with the first aspect, when the ISG motor is driven by the engine of the vehicle to generate electricity, the current status of the preset power limiting element of the vehicle is obtained, and the preset power limiting element is used according to the The current state of determining the first power generation power of the engine driving the ISG motor includes: determining the current power generation power generated by the engine driving the ISG motor; determining the current power that limits the power generation power according to the current state of the preset power limiting element. Restriction element: determine the minimum power value among the restricted powers obtained by limiting the generated power generated by different restriction elements as the first generated power.

In any possible implementation combined with the first aspect, when the vehicle is in a driving condition of parking charging or driving charging, obtaining the battery reference charging power according to the remaining power includes: combining the remaining power with the battery The smaller value among the charging power limits is determined as the battery reference charging power.

In any possible implementation of the first aspect, when the vehicle is in driving braking charging and the battery is charged through the ISG generator, obtaining the battery reference charging power according to the remaining power includes: The sum of the remaining power and the brake feedback power generated by the vehicle during the driving braking process is determined as the battery reference charging power.

In any possible implementation of the first aspect, the window range includes a first window range and a second window range, and the SOC maximum value of the first window range is less than or equal to the SOC maximum value of the second window range. The minimum SOC value, wherein, corresponding to the same operating condition, the correction coefficient corresponding to the first window range is greater than or equal to the correction coefficient corresponding to the second window range.

In any possible implementation combined with the first aspect, the window range includes 10 window ranges obtained by dividing the entire battery SOC window evenly.

In any possible implementation of the first aspect, the method further includes: when the vehicle is in a parking charging operating condition, controlling the parking charging function of the vehicle when the SOC is in the range of the first window to the seventh window. It is turned on within the time limit, and the parking charging function is controlled to be closed when the SOC is in the eighth window and above; wherein, the first window range is [0, 10%), the seventh window range is [60%, 70%), The eighth window range is [70%, 80%); and/or, when the vehicle is in the driving and charging operating condition, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the third window, And control the parking charging function to be closed within the window range where the SOC is in the fourth window and above; wherein the first window range is [0, 10%), the third window range is [20%, 30%), the The fourth window range is [30%, 40%); and/or, when the vehicle is in driving braking charging and the battery is charged by the ISG motor, the parking charging function of the vehicle is controlled to be turned off.

In the second aspect, an extended-range hybrid vehicle battery charging device is provided, including:

The first power determination module is used to obtain the current state of the preset power limiting element of the vehicle when the ISG motor of the starter generator is driven by the vehicle's engine to generate electricity, and determine the current state of the preset power limiting element based on the current state of the preset power limiting element. Determine the first generated power of the ISG motor driven by the engine;

A reference power determination module, configured to obtain the remaining power after meeting the power demand of the vehicle's electrical load based on the first generated power, and obtain the battery reference charging power based on the remaining power;

A correction coefficient determination module, configured to determine a correction coefficient according to the current operating conditions of the vehicle and the window range of the battery state of charge SOC of the vehicle; wherein the correction coefficient is for different operating conditions of the vehicle. The different window ranges of the battery SOC are determined; the window range is obtained by dividing the entire battery SOC window according to the preset division unit;

A charging power determination module is configured to use the correction coefficient to correct the battery reference charging power to obtain the battery target charging power, and use the battery target charging power to charge the battery of the vehicle.

In the third aspect, an extended-range hybrid vehicle is provided, including: vehicle controller VCU and power battery;

The VCU is configured to perform the extended-range hybrid vehicle battery charging method as described in the first aspect or any possible implementation in combination with the first aspect to charge the power battery.

The beneficial effects of the embodiments of the present disclosure include:

The extended-range hybrid vehicle battery charging method and device and the extended-range hybrid vehicle provided by the embodiments of the present disclosure first determine the current state of the preset power limiting element, and determine the third time the engine drives the ISG motor based on the current state of the preset limiting element. First, generate power; then determine the remaining power after the first generated power meets the vehicle's electrical load, and determine the battery reference charging power based on the remaining power; and determine the current application based on the current operating conditions of the vehicle and the window range of the battery SOC. The correction coefficient used; finally, the correction coefficient is used to correct the battery reference charging power, obtain the battery target charging power, and charge the battery. Among them, the correction coefficient is determined according to the different window ranges of the battery SOC under different operating conditions of the vehicle. It can be seen that the present disclosure considers the difference in charging power requirements of the different window ranges of the battery SOC under different operating conditions of the vehicle, that is, for different operating conditions. Under different battery SOC window ranges, the correction coefficients that meet the requirements are determined to correct the battery reference charging power to obtain the battery target charging power. Compared with the existing technology that determines a fixed power for charging under each working condition, this method The open charging strategy has higher charging efficiency, helps reduce fuel consumption and saves energy.

Description of the drawings

Figure 1 is a flow chart of a battery charging method for an extended-range hybrid vehicle provided by an embodiment of the present disclosure;

Figures 2a to 2c are schematic diagrams of energy flow under three driving conditions of the extended-range hybrid vehicle provided by the present disclosure;

FIG. 3 is a schematic structural diagram of a battery charging device for an extended-range hybrid vehicle provided by an embodiment of the present disclosure.

Detailed ways

The embodiments of the present disclosure provide battery charging methods and devices for extended-range hybrid vehicles, and extended-range hybrid vehicles. The preferred embodiments of the present disclosure will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only for They are used to describe and explain the present disclosure and are not intended to limit the present disclosure. And the embodiments and features in the embodiments in this application can be combined with each other without conflict.

An embodiment of the present disclosure provides a method for charging a battery of an extended-range hybrid vehicle, as shown in Figure 1, including:

S101. When the vehicle's engine drives the Integrated Starter Generator (ISG) motor to generate electricity, obtain the current state of the vehicle's preset power limiting element, and determine the current state of the preset power limiting element based on the current state of the preset power limiting element. The engine drives the first power generation of the ISG motor;

S102. Based on the first generated power determined in S101, obtain the remaining power after meeting the power demand of the vehicle's electrical load, and obtain the battery reference charging power based on the remaining power;

S103. Determine the correction coefficient according to the current operating conditions of the vehicle and the window range of the vehicle's battery state of charge (SOC, State of Charge); where the correction coefficient is determined based on the different window ranges of the battery SOC under different operating conditions of the vehicle. ; The window range is obtained by dividing the entire battery SOC window according to the preset division units;

S104. Use the correction coefficient determined in S103 to correct the battery reference charging power obtained in S102 to obtain the battery target charging power, and use the battery target charging power to charge the vehicle's battery.

In the embodiment of the present disclosure, the engine can drive the ISG motor to generate electricity, and the first generated power can be determined under the constraints of the preset power limiting factors. After the first generated power preferentially meets the needs of the vehicle's electrical load, the first generated power can be determined based on the remaining power. The generated power determines the battery reference charging power. The disclosed embodiment also provides correction coefficients for different window ranges of battery SOC under different operating conditions of the vehicle. After using the correction coefficient to correct the battery reference charging power, the target charging power for charging the vehicle battery can be obtained.

Figures 2a to 2c are schematic diagrams of energy flow under three driving conditions of the extended-range hybrid vehicle provided by the present disclosure. As shown in Figures 2a to 2c, the engine 201 is mechanically connected to the ISG generator 202, the ISG generator 202 is electrically connected to the controller 203, and the high-voltage box 205 is connected to the power battery 204 (i.e., the battery of the vehicle in the embodiment of the present disclosure) and the controller. 203, and the controller 206 are electrically connected respectively, and the controller 206 is electrically connected to the auxiliary drive motor 207. Among them, the controller 203 is an ISG motor controller, and the controller 206 is an auxiliary drive motor controller. In addition, these controllers, engines, etc. can all work under the control of the vehicle controller (VCU, Vehicle ControlUnit). VCU can determine the driver's driving intention by collecting signals such as accelerator pedal, gear position, brake pedal, etc., and by monitoring vehicle status (vehicle speed, temperature, etc.) information, after VCU judgment and processing, send it to the power system, power battery system, etc. Vehicle operating status control instructions. The execution subject of the embodiment of the present disclosure may be VCU.

Figure 2a is a schematic diagram of the energy flow of the extended-range hybrid vehicle provided by the embodiment of the present disclosure under parking and charging conditions. As shown in Figure 2a, in the parking state, the auxiliary drive motor 207 does not work, and the engine 201 drives the ISG generator 202 to generate electricity. , the power battery 204 is charged through the high-voltage box 205. Figure 2b is a schematic diagram of the energy flow of the extended-range hybrid vehicle under driving and charging conditions provided by the embodiment of the present disclosure. As shown in Figure 2b, in the driving state, the vehicle does not have high power requirements, and the electric energy generated by the generator 201 is in addition to In addition to supplying the entire vehicle load, excess electric energy can be used to charge the power battery 204 . Figure 2c is a schematic diagram of the energy flow of the extended-range hybrid vehicle provided by the embodiment of the present disclosure under the condition of driving braking combined with ISG motor charging. As shown in Figure 2c, under the condition of driving braking combined with ISG motor charging, not only the ISG generator Part of the electric energy of 202 can charge the power battery 204. The feedback current generated by braking during driving can also flow through the auxiliary drive motor 207, the controller 206 and the high-voltage box 205 to charge the power battery 204.

It can be seen that the charging power often changes dynamically under each of the above operating conditions. If the corresponding fixed power is used to charge the power battery 204 in each operating condition, this charging strategy is undoubtedly not sophisticated enough and cannot fully utilize the energy. . Taking into account the different SOC under each working condition, the demand for charging power is also different. Generally, the lower the SOC, the higher the demand for charging power. In view of this situation, the embodiment of the present disclosure pre-divides the entire battery SOC window according to preset division units to obtain multiple window ranges of SOC, and predetermines corresponding correction coefficients for different window ranges of battery SOC under different operating conditions of the vehicle. The battery reference charging power to be used to charge the power battery 204 is corrected so that the corrected charging power meets the charging power requirement within the SOC window range under current operating conditions. It can be seen that the embodiments of the present disclosure take into account the difference in charging power requirements of different battery SOC window ranges of the vehicle under different working conditions, that is, the correction coefficients that meet the requirements are determined for different battery SOC window ranges under different working conditions, so as to improve the battery performance. The battery target charging power is obtained after correction with reference to the charging power. Compared with the existing technology that determines a fixed power for each working condition for charging, the charging strategy is more refined and the charging efficiency is higher, which is beneficial to reducing fuel consumption and saving energy.

In yet another embodiment of the present disclosure, a method for charging a battery of an extended-range hybrid vehicle is provided. The preset power limiting factors include at least one of the following: engine water temperature, maximum available power generation of the ISG motor, and vehicle fault status.

In this embodiment, the power generated by the generator driving the ISG motor to generate electricity is also limited by preset power limiting factors, such as: engine water temperature, maximum available power generation of the ISG motor, vehicle fault status, etc. During implementation, the current power limitation factors that limit the power generation can be determined based on the current status of the vehicle. For example: if the current vehicle fails, the limit of the current power generation of the fault can be determined; if the engine water temperature changes, the impact of the current water temperature on the generator can be determined. Power limitations, etc.

In yet another embodiment of the present disclosure, a method for charging an extended-range hybrid vehicle battery is provided. In step S101 in FIG. The implementation of "First Power Generation" is as follows:

Step 1: Determine at least one preset power limitation element that currently limits the power generation according to the current status of the preset power limitation element;

Step 2: Determine the power limit value of the at least one preset power limit element on the generated power respectively;

Step 3: Determine the first generated power of the ISG motor driven by the engine according to the minimum power value among the at least one power limit value obtained in Step 2.

As mentioned above, according to the current status of the vehicle, there may be at least one preset power limitation factor that limits the generated power. Therefore, it is necessary to determine the current preset power limitation factor based on the current status of the preset power limitation factor. Power limiting factors, and then determine their limiting value for power generation. If there is more than one preset power limit element that causes restriction, the minimum value among the multiple power generation power limit values needs to be determined, and the first power generation power is determined based on the minimum value. In one implementation, the power generation demand can be determined under a specified power generation request, and the power generation demand power can be compared with the minimum power value, and the smaller of the two is used as the first power generation power.

In yet another embodiment of the present disclosure, a method for charging a battery of an extended-range hybrid vehicle is provided. When the vehicle is in the driving condition of parking charging or driving charging, in step S102, "acquire the battery reference charging power according to the remaining power", Can be implemented as:

The smaller value of the remaining power and the battery charging power limit is determined as the battery reference charging power.

In this embodiment, when the vehicle is in the driving condition of parking charging or driving charging, the battery charging power limit is also considered, and the smaller value of the remaining power and the battery charging power limit is determined as the battery reference charging power.

In yet another embodiment of the present disclosure, a method for charging a battery of an extended-range hybrid vehicle is provided. When the vehicle is charging under the driving brake and the battery is charged by the ISG motor, in step S102, "According to the remaining power, obtain "Battery reference charging power" can be implemented as:

The sum of the remaining power and the brake feedback power generated by the vehicle during driving braking is determined as the battery reference charging power.

In this embodiment, when the vehicle is charging during driving braking and the battery is charged by the ISG motor, the braking feedback power generated by the vehicle during the driving braking process is also considered, and the remaining power is combined with the braking feedback The sum of the powers is determined as the battery reference charging power.

In yet another embodiment of the present disclosure, a method for charging a battery of an extended-range hybrid vehicle is provided. The window range includes a first window range and a second window range. The maximum SOC value of the first window range is less than or equal to that of the second window range. The minimum SOC value, where, corresponding to the same operating condition, the correction coefficient corresponding to the first window range is greater than or equal to the correction coefficient corresponding to the second window range.

In this embodiment, the entire SOC window range includes 0 to 100%. When dividing the window range, it can be divided sequentially from 0 to 100%. Then for any two window ranges, if the maximum SOC value of the first window range is less than or equal to The minimum value of the second window range is such that under any operating condition, the correction coefficient corresponding to the first window range is greater than or equal to the correction coefficient corresponding to the second window range. That is to say, if the SOC represented by the first window range is lower than (or equal to) the SOC represented by the second window range, the correction coefficient determined for the first window range is higher than (or equal to) the correction coefficient determined for the second window range. Coefficient to ensure that more charging power can be obtained when the battery SOC is low.

It can be seen that for each operating condition, as the SOC value represented by the window range under the operating condition increases from small to large, through the correction of the correction coefficient, the battery charging power in the corresponding window range decreases in a gradient, which satisfies different operating conditions. Charging power requirements in different SOC window ranges under different conditions.

In yet another embodiment of the present disclosure, a method for charging an extended-range hybrid vehicle battery is provided. The window range includes 10 window ranges obtained by dividing the entire battery SOC window evenly.

In this embodiment, 0 to 100% can be used as the entire battery SOC window range. Then the entire battery SOC window is divided evenly into 10 window ranges, that is, 10% is used as the division unit, and the obtained division result is: [0, 10% ), [10%, 20%), [20%, 30%), [30%, 40%), [40%, 50%), [50%, 60%), [60%, 70%), [70%, 80%), [80%, 90%), [90%, 100%).

In yet another embodiment of the present disclosure, a method for charging an extended-range hybrid vehicle battery is provided, further comprising:

When the vehicle is in the operating condition of parking and charging, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the seventh window, and the parking charging function is controlled to be turned off when the SOC is in the eighth window and above; Wherein, the first window range is [0, 10%), the seventh window range is [60%, 70%), the eighth window range is [70%, 80%); and/or,

When the vehicle is in driving charging operating conditions, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the third window, and the parking charging function is controlled to be turned off when the SOC is in the fourth window and above; Among them, the first window range is [0, 10%), the third window range is [20%, 30%), and the fourth window range is [30%, 40%); and/or,

When the vehicle is under driving braking charging and the battery is charged through the ISG motor, the parking charging function of the vehicle is controlled to be turned off.

In this embodiment, the turning on or off of the parking charging function under different operating conditions is disclosed: when the vehicle is in the operating condition of parking charging, the parking charging function of the vehicle is controlled to be in the first window to the seventh window in the SOC. When the SOC is in the eighth window and above, it can be considered that the vehicle has sufficient power, and the parking charging function can be turned off; when the vehicle is in driving charging operating conditions, it can be turned on when the battery SOC is low. The parking charging function, for example, controls the parking charging function of the vehicle to be turned on when the SOC is within the range of the first window to the third window.

Table 1 is an example of a battery charging strategy developed using the extended-range hybrid vehicle battery charging method provided by the present disclosure:

Table 1

As shown in Table 1, the entire SOC range is divided into 10 window ranges, and the driving conditions are divided into three situations: parking charging, driving charging, braking feedback and battery charging through the ISG generator. The SOC charging window range is from [10% to 20%) to [70% to 80%). When the SOC window range is <10%, it is forced to stop charging. When 10% ≤ SOC <80%, charging can be carried out in different modes. When the SOC window range is When ≥80%, charging is prohibited, and the charging power is different under different driving conditions and different SOC.

Under parking charging conditions, the correction coefficients of the SOC window range from [10% to 20%) to [70% to 80%) are 0.8, 0.7, 0.6, 0.5, 0.5, 0.5, 0.4 in sequence. The parking charging function is in [ It is open within the SOC window range of 10% ~ 20%) ~ [70% ~ 80%), and closed above 80% of the SOC window range.

Under driving charging conditions, the correction coefficients of the SOC window range from [10% to 20%) to [70% to 80%) are 1, 0.9, 0.8, 0.7, 0.6, 0.6, 0.5, and the parking charging function is in [ It is turned on within the SOC window range of 10% ~ 20%) ~ [30% ~ 40%), and parking charging is not involved above the 40% SOC window range.

Under the condition of braking feedback and charging the battery through the ISG generator, the correction coefficients of the SOC window range from [10% to 20%) to [70% to 80%) are 0.9, 0.8, 0.7, 0.6, 0.5, 0.5 in sequence , 0.4, no parking charging is involved above 10% SOC. Among them, the correction coefficients under each operating condition are obtained from experiments and can be adaptively adjusted according to the needs of different scenarios, and are not used to limit this disclosure.

It can be seen that the embodiments of the present disclosure provide a charging strategy for the power battery of the extended-range hybrid wide-body dump truck: due to the differences in the charging power requirements of the battery under different vehicle operating conditions, the embodiments of the present disclosure provide a charging strategy for the battery's rechargeable SOC. Within the window range, the charging power is carefully divided and stepped power changes are adopted to achieve precise control of the generator charging power, which not only improves the charging efficiency but also reduces fuel consumption, and is also conducive to improving the fuel saving rate.

Based on the same disclosed concept, embodiments of the present disclosure also provide an extended-range hybrid vehicle battery charging device. Since the principles of the problems solved by these devices are similar to the aforementioned extended-range hybrid vehicle battery charging methods, the implementation of the device can be found in The implementation of the foregoing method will not be repeated again.

An embodiment of the present disclosure also provides an extended-range hybrid vehicle battery charging device, as shown in Figure 3, including:

The first power determination module 301 is used to obtain the current status of the preset power limitation element of the vehicle when the ISG motor of the starter generator is driven by the vehicle's engine to generate electricity, and determine the current status of the preset power limitation element according to the current status of the preset power limitation element. The state determines the first generated power of the ISG motor driven by the engine;

The reference power determination module 302 is configured to obtain the remaining power after meeting the power demand of the vehicle's electrical load based on the first generated power, and obtain the battery reference charging power based on the remaining power;

The correction coefficient determination module 303 is used to determine a correction coefficient according to the current operating conditions of the vehicle and the window range of the battery state of charge SOC of the vehicle; wherein the correction coefficient is for different operating conditions of the vehicle. The different window ranges of the lower battery SOC are determined; the window range is obtained by dividing the entire battery SOC window according to the preset division unit;

The charging power determination module 304 is configured to use the correction coefficient to correct the battery reference charging power to obtain the battery target charging power, and use the battery target charging power to charge the battery of the vehicle.

In yet another embodiment provided by the present disclosure, the preset power limiting factors include at least one of the following: engine water temperature, maximum available power generation of the ISG motor, and vehicle fault status.

In yet another embodiment provided by the present disclosure, the first power determination module 301 is used to determine the current power generated by the engine driving the ISG motor; and determine the current power that limits the power generation according to the current status of the preset power limiting element. Restriction element: determine the minimum power value among the restricted powers obtained by limiting the generated power generated by different restriction elements as the first generated power.

In yet another embodiment provided by the present disclosure, when the vehicle is in the driving condition of parking charging or driving charging, the reference power determination module 302 is used to determine the smaller value of the remaining power and the battery charging power limit as The battery reference charging power.

In yet another embodiment provided by the present disclosure, in a driving condition in which the vehicle is charging during driving braking and the battery is charged through the ISG generator, the reference power determination module 302 is used to compare the remaining power with the driving condition of the vehicle. The sum of the braking feedback power generated during the braking process is determined as the battery reference charging power.

In yet another embodiment provided by the present disclosure, the window range includes a first window range and a second window range, and the maximum SOC value of the first window range is less than or equal to the minimum SOC value of the second window range, where corresponding to the same operating condition , the correction coefficient corresponding to the first window range is greater than or equal to the correction coefficient corresponding to the second window range.

In yet another embodiment provided by the present disclosure, the window range includes 10 window ranges obtained by dividing the entire battery SOC window evenly.

In yet another embodiment provided by the present disclosure, the device further includes: a parking charging function control module 305; a parking charging function control module 305 configured to control the parking charging function of the vehicle when the vehicle is in a parking charging operating condition. The SOC is turned on within the range of the first window to the seventh window, and the parking charging function is controlled to be turned off when the SOC is within the range of the eighth window and above; wherein, the first window range is [0, 10%), the seventh window The window range is [60%, 70%), the eighth window range is [70%, 80%); and/or,

When the vehicle is in driving charging operating conditions, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the third window, and the parking charging function is controlled to be turned off when the SOC is in the fourth window and above; Wherein, the first window range is [0, 10%), the third window range is [20%, 30%), the fourth window range is [30%, 40%); and/or,

When the vehicle is under driving braking charging and the battery is charged through the ISG motor, the parking charging function of the vehicle is controlled to be turned off.

An embodiment of the present disclosure also provides an extended-range hybrid vehicle, including: a vehicle controller VCU and a power battery;

The VCU is used to perform the charging method as described in any of the above-mentioned extended-range hybrid vehicle battery charging method embodiments to charge the power battery.

The extended-range hybrid vehicle battery charging method, device, and extended-range hybrid vehicle provided by the embodiments of the present disclosure take into account the differences in charging power requirements of different battery SOC window ranges of the vehicle under different working conditions, that is, for different working conditions. The correction coefficients that meet the requirements are determined for different battery SOC window ranges to correct the battery reference charging power to obtain the battery target charging power. Compared with the existing technology that determines a fixed power for each working condition for charging, the charging strategy The formulation is more refined and the charging efficiency is higher, which is beneficial to reducing fuel consumption and saving energy.

Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments of the present disclosure can be implemented by hardware, or can also be implemented by software plus a necessary general hardware platform. Based on this understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of software products. The software products can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), It includes several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present disclosure.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary for implementing the present disclosure.

Those skilled in the art can understand that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed and located in one or more devices different from that in this embodiment. The modules of the above embodiments can be combined into one module, or further divided into multiple sub-modules.

The above serial numbers of the embodiments of the present disclosure are only for description and do not represent the advantages and disadvantages of the embodiments.

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the disclosure. In this way, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies, the present disclosure is also intended to include these modifications and variations.

Claims (10)

1. An extended-range hybrid vehicle battery charging method, characterized by comprising: When the engine of the vehicle drives the integrated starter generator ISG motor to generate electricity, the current state of the preset power limiting element of the vehicle is obtained, and it is determined based on the current state of the preset power limiting element that the engine drives the ISG The first generated power of the motor; Based on the first generated power, obtain the remaining power after meeting the power demand of the vehicle's electrical load, and obtain the battery reference charging power based on the remaining power; The correction coefficient is determined according to the current operating conditions of the vehicle and the window range of the battery state of charge SOC of the vehicle; wherein the correction coefficient is determined for the different window ranges of the battery SOC under different operating conditions of the vehicle. ;The window range is obtained by dividing the entire battery SOC window according to the preset division unit; The battery reference charging power is corrected using the correction coefficient to obtain the battery target charging power, and the battery target charging power is used to charge the vehicle battery. 2. The method of claim 1, wherein the preset power limiting factors include at least one of the following: engine water temperature, maximum available power generation of the ISG motor, and vehicle fault status. 3. The method of claim 1 or 2, wherein determining the first generated power of the ISG motor driven by the engine according to the current state of the preset power limiting element includes: Determine at least one preset power limitation element that currently limits power generation according to the current status of the preset power limitation element; Respectively determine the power limit value of the at least one preset power limit element on the generated power; The first generated power of the ISG motor driven by the engine is determined based on the minimum power value among the at least one power limit value obtained. 4. The method according to claim 1 or 2, characterized in that, when the vehicle is in a driving condition of parking charging or driving charging, obtaining the battery reference charging power according to the remaining power includes: The smaller value of the remaining power and the battery charging power limit is determined as the battery reference charging power. 5. The method according to claim 1 or 2, characterized in that, when the vehicle is in driving braking charging and the battery is charged by the ISG generator, the battery reference charging power is obtained according to the remaining power, include: The sum of the remaining power and the brake feedback power generated by the vehicle during the driving braking process is determined as the battery reference charging power. 6. The method of claim 1 or 2, wherein the window range includes a first window range and a second window range, and the SOC maximum value of the first window range is less than or equal to the second window The SOC minimum value of the range, wherein, corresponding to the same operating condition, the correction coefficient corresponding to the first window range is greater than or equal to the correction coefficient corresponding to the second window range. 7. The method of claim 1 or 2, wherein the window range includes 10 window ranges obtained by dividing the entire battery SOC window evenly. 8. The method of claim 7, further comprising: When the vehicle is in the operating condition of parking and charging, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the seventh window, and the parking charging function is controlled to be turned off when the SOC is in the eighth window and above; Wherein, the first window range is [0, 10%), the seventh window range is [60%, 70%), the eighth window range is [70%, 80%); and/or, When the vehicle is in driving charging operating conditions, the parking charging function of the vehicle is controlled to be turned on when the SOC is in the range of the first window to the third window, and the parking charging function is controlled to be turned off when the SOC is in the fourth window and above; Wherein, the first window range is [0, 10%), the third window range is [20%, 30%), the fourth window range is [30%, 40%); and/or, When the vehicle is under driving braking charging and the battery is charged through the ISG motor, the parking charging function of the vehicle is controlled to be turned off. 9. An extended-range hybrid vehicle battery charging device, characterized by comprising: The first power determination module is used to obtain the current state of the preset power limiting element of the vehicle when the ISG motor of the starter generator is driven by the vehicle's engine to generate electricity, and determine the current state of the preset power limiting element based on the current state of the preset power limiting element. Determine the first generated power of the ISG motor driven by the engine; A reference power determination module, configured to obtain the remaining power after meeting the power demand of the vehicle's electrical load based on the first generated power, and obtain the battery reference charging power based on the remaining power; A correction coefficient determination module, configured to determine a correction coefficient according to the current operating conditions of the vehicle and the window range of the battery state of charge SOC of the vehicle; wherein the correction coefficient is for different operating conditions of the vehicle. The different window ranges of the battery SOC are determined; the window range is obtained by dividing the entire battery SOC window according to the preset division unit; A charging power determination module is configured to use the correction coefficient to correct the battery reference charging power to obtain the battery target charging power, and use the battery target charging power to charge the battery of the vehicle. 10. An extended-range hybrid vehicle, characterized by including: a vehicle controller VCU and a power battery; The VCU is configured to perform the extended-range hybrid vehicle battery charging method as described in any one of claims 1 to 8 to charge the power battery.