Control method for a hybrid vehicle and hybrid vehicle

Abstract

The application discloses a control method of a hybrid vehicle and the hybrid vehicle, and the control method of the hybrid vehicle comprises the following steps: obtaining the SOC of a battery pack; confirming that the vehicle enters a motor driving mode; and controlling the maximum speed of the vehicle according to the SOC of the battery pack. According to the control method of the hybrid vehicle, the probability that the driving force of the vehicle is rapidly attenuated due to the rapid power consumption of the battery pack in a low power state can be reduced, and the safety and the driving experience during the driving of the vehicle are improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a control method for a hybrid vehicle and a hybrid vehicle. Background Technology

[0002] With the development of automotive technology, hybrid vehicles are becoming increasingly common. In hybrid vehicles, both the engine and the electric motor can drive the vehicle. The electric power of the drive motor is mainly provided by the battery pack. When the battery pack's state of charge (SOC) is low, the rapid consumption of electricity in the battery pack may cause the vehicle's driving force to decrease rapidly, affecting driving safety. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a control method for a hybrid vehicle, which can improve the safety of the vehicle during operation.

[0004] The present invention also proposes a vehicle that applies the above-described control method for hybrid vehicles.

[0005] A control method for a hybrid vehicle according to a first aspect of the present invention includes: acquiring the state of charge (SOC) of the battery pack; confirming that the vehicle has entered an electric motor drive mode; and controlling the maximum speed of the vehicle based on the SOC of the battery pack.

[0006] According to the control method for hybrid vehicles of the first aspect of the present invention, the probability of the vehicle's driving force rapidly decreasing due to excessive power consumption of the battery pack in a low-power state can be reduced, thereby improving the safety and driving experience of the vehicle during operation.

[0007] According to some embodiments of the present invention, controlling the maximum vehicle speed based on the SOC of the battery pack includes: if the SOC of the battery pack is less than a first set value and greater than or equal to a second set value, controlling the maximum vehicle speed not to exceed a first vehicle speed; if the SOC of the battery pack is less than the second set value, controlling the maximum vehicle speed not to exceed a second vehicle speed, wherein the second vehicle speed is less than the first vehicle speed.

[0008] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the control method further includes: controlling the operating state of the generator according to the SOC of the battery pack, wherein the operating state of the generator includes stopping operation, automatic start-stop, and continuous power generation.

[0009] According to some embodiments of the present invention, controlling the operating state of the generator based on the SOC of the battery pack includes: if the SOC of the battery pack is greater than or equal to a third preset value, controlling the generator to stop working; if the SOC of the battery pack is less than the third preset value but greater than or equal to a fourth preset value, controlling the generator to be in an automatic start-stop state; if the SOC of the battery pack is less than the fourth preset value, controlling the generator to be in a continuous power generation state.

[0010] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the control method further includes: controlling the discharge power of the battery pack according to the SOC of the battery pack.

[0011] According to some embodiments of the present invention, controlling the discharge power of the battery pack based on the SOC of the battery pack includes: if the SOC of the battery pack is less than a fifth set value and greater than or equal to a sixth set value, then controlling the battery pack to enter a limited discharge state, in which the discharge power of the battery pack is less than the rated discharge power; if the SOC of the battery pack is less than the sixth set value, then the battery pack stops discharging externally, and the generator drives the drive motor to operate.

[0012] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the control method further includes: controlling the output power of the air conditioner according to the SOC of the battery pack.

[0013] According to some embodiments of the present invention, controlling the output power of the air conditioner based on the SOC of the battery pack includes: if the SOC of the battery pack is less than a seventh set value and greater than or equal to an eighth set value, then controlling the air conditioner to enter a limited heat exchange state, in which the output power of the air conditioner is less than the rated power; if the SOC of the battery pack is less than the eighth set value, then turning off the air conditioner.

[0014] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the control method further includes: controlling the output power of the drive motor according to the SOC of the battery pack.

[0015] According to some embodiments of the present invention, controlling the output power of the drive motor based on the SOC of the battery pack includes: if the SOC of the battery pack is less than a ninth preset value and greater than or equal to a tenth preset value, then controlling the drive motor to enter a limited drive state, in which the output power of the drive motor is less than the rated power; if the SOC of the battery pack is less than the tenth preset value, then the drive motor stops working and the vehicle exits the motor drive mode.

[0016] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the method further includes: controlling the operating state of the braking energy recovery system according to the SOC of the battery pack, wherein the operating state of the braking energy recovery system includes stopping operation, limiting recovery, and normal operation.

[0017] According to some embodiments of the present invention, controlling the operating state of the regenerative braking system based on the SOC of the battery pack includes: if the SOC of the battery pack is greater than or equal to an eleventh set value, the regenerative braking system stops operating; if the SOC of the battery pack is less than the eleventh set value but greater than or equal to a twelfth set value, the regenerative braking system is in a limited regenerative braking state, in which the regenerative braking torque is less than the rated torque; if the SOC of the battery pack is less than the twelfth set value, the regenerative braking system is in a normal operating state.

[0018] According to some embodiments of the present invention, after confirming that the vehicle has entered the motor drive mode, the control method further includes: controlling the display of the battery pack's SOC prompt information on the instrument panel according to the battery pack's SOC.

[0019] According to some embodiments of the present invention, the prompt information for displaying the SOC of the battery pack on the instrument panel based on the SOC of the battery pack includes: if the SOC of the battery pack is less than the thirteenth set value and greater than or equal to the fourteenth set value, then the SOC of the battery pack is displayed in the middle area of ​​the instrument panel; if the SOC of the battery pack is less than the fourteenth set value, then a prompt is displayed on the instrument panel to charge the battery pack.

[0020] According to some embodiments of the present invention, after obtaining the SOC of the battery pack, the method further includes: controlling the operating state of the vehicle's high-voltage circuit based on the SOC of the battery pack.

[0021] According to some embodiments of the present invention, controlling the operating state of the vehicle's high-voltage circuit based on the SOC of the battery pack includes: if the SOC of the battery pack is less than a fifteenth set value, then controlling the vehicle's high-voltage circuit to disconnect and the DC-DC controller to stop working.

[0022] The vehicle according to the second aspect of the present invention applies the control method of the hybrid vehicle according to the first aspect of the present invention.

[0023] According to the second aspect of the present invention, the safety of the hybrid vehicle during operation can be improved by applying the control method of the hybrid vehicle according to the first aspect of the present invention.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a flowchart of a control method for a hybrid vehicle according to a first embodiment of the present invention;

[0026] Figure 2 yes Figure 1The flowchart shown illustrates the control of the vehicle's maximum speed based on the battery pack's SOC.

[0027] Figure 3 This is a flowchart of a control method for a hybrid vehicle according to a second embodiment of the present invention;

[0028] Figure 4 This is a flowchart of a control method for a hybrid vehicle according to a third embodiment of the present invention;

[0029] Figure 5 This is a flowchart of a control method for a hybrid vehicle according to a fourth embodiment of the present invention;

[0030] Figure 6 This is a flowchart of a control method for a hybrid vehicle according to a fifth embodiment of the present invention;

[0031] Figure 7 This is a flowchart of a control method for a hybrid vehicle according to a sixth embodiment of the present invention;

[0032] Figure 8 This is a flowchart of a control method for a hybrid vehicle according to a seventh embodiment of the present invention;

[0033] Figure 9 This is a flowchart of a control method for a hybrid vehicle according to the eighth embodiment of the present invention. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is for reference. Figures 1-9 A control method for a hybrid vehicle according to an embodiment of the first aspect of the present invention is described.

[0036] like Figure 1 and Figure 2 As shown, a control method for a hybrid vehicle according to a first aspect embodiment of the present invention includes:

[0037] Obtain the SOC of the battery pack;

[0038] Confirm that the vehicle has entered electric motor drive mode;

[0039] The vehicle's maximum speed is controlled based on the battery pack's state of charge (SOC).

[0040] The vehicle has an engine, a battery pack, and a drive motor. Both the engine and the drive motor can drive the vehicle. The battery pack can provide the electrical energy needed for the drive motor to operate. The engine can charge the battery pack. The SOC of the battery pack refers to the ratio of the remaining charge of the battery pack to the charge when it is fully charged.

[0041] In electric motor drive mode, the drive motor propels the vehicle, and the battery pack provides power to the drive motor. As those skilled in the art will understand, when the vehicle speed is high, the drive motor consumes power quickly. When the battery pack's SOC is low, if the battery pack's power is consumed rapidly, it may cause a sudden drop in the drive motor's driving torque to the vehicle, thereby affecting the user's safety and driving experience.

[0042] In this embodiment, the maximum vehicle speed is controlled based on the SOC of the battery pack. When the SOC of the battery pack is high, the maximum vehicle speed is not limited, thus ensuring the driving experience of the occupants. When the SOC of the battery pack is low, the maximum vehicle speed is reduced to decrease the probability of the vehicle's driving force rapidly decreasing due to excessive power consumption in the battery pack, thereby improving the safety of the vehicle during driving.

[0043] It should be noted that the above-mentioned unrestricted maximum speed refers to the maximum speed of a vehicle within the legally permitted range.

[0044] According to the control method of the hybrid vehicle of the first aspect of the present invention, the probability of the vehicle's driving force rapidly decreasing due to excessive power consumption of the battery pack in a low-power state can be reduced, thereby improving the safety and driving experience of the vehicle during operation.

[0045] In some embodiments of the present invention, such as Figure 2 As shown, controlling the vehicle's maximum speed based on the battery pack's SOC includes:

[0046] If the SOC of the battery pack is less than the first set value and greater than or equal to the second set value, the maximum speed of the vehicle shall be controlled not to exceed the first speed.

[0047] At this point, it is determined that the battery pack has a low charge level and rapid power consumption will cause unstable power supply, thus limiting the vehicle's maximum speed. Preferably, the first setting value is 40%, the second setting value is 25%, and the first speed is greater than 100 km / h and less than 150 km / h. For example, the first speed can be 105 km / h, 110 km / h, 115 km / h, 120 km / h, 130 km / h, 140 km / h, or 150 km / h.

[0048] When the SOC of the battery pack is greater than or equal to the first set value, the battery pack is deemed to have sufficient power, and the maximum speed of the vehicle is not limited.

[0049] If the SOC of the battery pack is less than the second set value, the maximum speed of the vehicle is controlled to not exceed the second speed, and the second speed is less than the first speed.

[0050] At this point, it is determined that the risk of unstable power supply caused by rapid consumption of battery pack power is increasing, and the maximum speed of the vehicle is further limited. Preferably, the second speed is 100km / h.

[0051] This enables the control of the vehicle's maximum speed based on the battery pack's SOC.

[0052] In some embodiments of the present invention, such as Figure 3 As shown, after confirming that the vehicle has entered the motor drive mode, the control method also includes:

[0053] The generator's operating status is controlled based on the battery pack's SOC. The generator's operating status includes stopping, automatic start / stop, and continuous power generation.

[0054] In the automatic start-stop mode, the generator does not operate, saving energy and improving the vehicle's quietness. In the automatic start-stop mode, the engine drives the generator to charge the battery pack while the vehicle is moving, and the engine and generator stop operating when the vehicle stops. In the continuous power generation mode, the engine drives the generator to charge the battery pack regardless of whether the vehicle is moving.

[0055] Controlling the generator's operating state based on the battery pack's SOC allows for a better match between the generator's operation and the battery pack's charging needs, thereby further improving vehicle safety and enhancing the user experience.

[0056] In some embodiments of the present invention, such as Figure 3 As shown, the operating state of the generator is controlled according to the SOC of the battery pack, including:

[0057] If the battery pack's SOC is greater than or equal to a third preset value, the generator is controlled to stop working. At this time, it is determined that the battery pack has sufficient remaining charge, and the battery pack provides power to the drive motor. Preferably, the third preset value is 40%.

[0058] If the battery pack's SOC is less than a third set value but greater than or equal to a fourth set value, the generator is controlled to enter automatic start-stop mode. At this time, it is determined that the battery pack needs charging. While the vehicle is moving, the engine drives the generator to charge the battery pack. When the vehicle stops, the engine and generator stop operating. Preferably, the fourth set value is 25%.

[0059] If the battery pack's SOC is less than the fourth preset value, the generator is kept in continuous power generation mode. At this time, it is determined that the battery pack urgently needs charging, and the engine drives the generator to charge the battery pack regardless of whether the vehicle is moving.

[0060] This enables the generator's operating status to be controlled based on the battery pack's SOC.

[0061] In some embodiments of the present invention, such as Figure 4 As shown, after confirming that the vehicle has entered the motor drive mode, the control method also includes:

[0062] The discharge power of the battery pack is controlled based on the state of charge (SOC) of the battery pack.

[0063] During vehicle operation, the battery pack provides power to the drive motor and some electrical components on the vehicle. When the battery pack is in a low charge state, if the battery pack discharges at a high power, the power consumption may be too fast and the vehicle performance may degrade rapidly. Therefore, controlling the discharge power of the battery pack according to its SOC can further improve the safety and driving experience during vehicle operation.

[0064] In some embodiments of the present invention, such as Figure 4 As shown, controlling the discharge power of the battery pack based on its SOC includes:

[0065] If the SOC of the battery pack is less than the fifth setting value but greater than or equal to the sixth setting value, the battery pack is controlled to enter a limited discharge state. In the limited discharge state, the discharge power of the battery pack is less than the rated discharge power. At this time, it is determined that the battery pack has low power and rapid power consumption will cause unstable power supply, so the discharge power of the battery pack is limited. Preferably, the fifth setting value is 25% and the sixth setting value is 20%.

[0066] If the battery pack's SOC is less than the sixth preset value, the battery pack stops discharging externally, and the generator drives the drive motor. At this time, the engine drives the generator to generate electricity, which provides power to the drive motor to operate. It can be understood that the battery pack itself needs to consume some electricity. After the battery pack stops discharging externally, the rate of battery pack power consumption can be reduced, maintaining the battery pack in an active state.

[0067] Therefore, it is possible to control the discharge power of the battery pack based on its SOC.

[0068] In some embodiments of the present invention, such as Figure 5 As shown, after confirming that the vehicle has entered the motor drive mode, the control method also includes:

[0069] The output power of the air conditioner is controlled based on the SOC of the battery pack.

[0070] During vehicle operation, the battery pack provides power to the air conditioner, and the operation of the air conditioner also affects the change in the battery pack's charge level. By controlling the air conditioner's output power according to the battery pack's SOC, the safety and driving experience during vehicle operation can be further improved.

[0071] In some embodiments of the present invention, such as Figure 5 As shown, controlling the air conditioner's output power based on the battery pack's SOC includes:

[0072] If the battery pack's SOC is less than the seventh setting value but greater than or equal to the eighth setting value, the air conditioner is controlled to enter a heat exchange restriction state. In this state, the air conditioner's output power is less than its rated power. At this time, it is determined that the battery pack's low charge and rapid power consumption will cause power instability. Reducing the air conditioner's output power can decrease its power consumption, thereby reducing the battery pack's power consumption. Preferably, the seventh setting value is 25%, and the eighth setting value is 17%.

[0073] If the battery pack's SOC is less than the eighth set value, the air conditioner will be turned off. At this point, the battery pack's charge is low and needs to be recharged.

[0074] This enables the air conditioner's output power to be controlled based on the battery pack's SOC.

[0075] In some embodiments of the present invention, such as Figure 6 As shown, after confirming that the vehicle has entered the motor drive mode, the control method also includes:

[0076] The output power of the drive motor is controlled based on the SOC of the battery pack.

[0077] During vehicle operation, the output power of the drive motor is strongly correlated with the rate of battery pack power consumption. By controlling the output power of the drive motor according to the battery pack's SOC, the battery pack's discharge process can be further optimized, improving vehicle safety and driving experience.

[0078] In some embodiments of the present invention, such as Figure 6 As shown, the output power of the drive motor is controlled according to the SOC of the battery pack, including:

[0079] If the battery pack's State of Charge (SOC) is less than the ninth setting value but greater than or equal to the tenth setting value, the drive motor is controlled to enter a limited drive state. In this state, the drive motor's output power is less than its rated power. At this time, it is determined that the battery pack's low charge and rapid power consumption will cause unstable power supply. Limiting the drive motor's output power reduces battery pack power consumption, thereby improving vehicle safety and driving experience. Preferably, the ninth setting value is 23%, and the tenth setting value is 15%.

[0080] If the battery pack's SOC is less than the tenth preset value, the drive motor stops working, and the vehicle exits the motor drive mode. At this time, the engine drives the vehicle, allowing the user to use the vehicle normally.

[0081] This enables the output power of the drive motor to be controlled based on the SOC of the battery pack.

[0082] In some embodiments of the present invention, such as Figure 7 As shown, after confirming that the vehicle has entered electric motor drive mode, the following steps are also included:

[0083] The operating status of the regenerative braking system is controlled according to the SOC of the battery pack. The operating status of the regenerative braking system includes stopped operation, limited regeneration, and normal operation.

[0084] Specifically, in the stopped working state, the vehicle's regenerative braking function is turned off; in the limited regeneration state, the vehicle's regenerative braking torque is less than the regenerative braking torque during normal operation.

[0085] Charging the battery pack using regenerative braking when the battery pack has a high charge level can lead to overcharging. Controlling the regenerative braking system's operation based on the battery pack's state of charge (SOC) can further improve vehicle safety during driving.

[0086] In some embodiments of the present invention, such as Figure 7 As shown, the operating states of the regenerative braking system controlled according to the battery pack's SOC include:

[0087] If the battery pack's State of Charge (SOC) is greater than or equal to the eleventh preset value, the regenerative braking system stops operating. At this point, the battery pack is considered to have sufficient charge, and regenerative braking could overcharge it; therefore, stopping the regenerative braking system improves vehicle safety. Preferably, the eleventh preset value is 95%.

[0088] If the battery pack's State of Charge (SOC) is less than the eleventh set value but greater than or equal to the twelfth set value, the regenerative braking system is in a limited regeneration state. In this limited regeneration state, the regenerative braking torque is less than the rated torque. At this time, a portion of the battery pack's charge has already been consumed. Regenerating braking energy at a torque less than the rated torque can replenish some of the battery pack's charge consumption, and the risk of overcharging the battery pack is relatively low. Preferably, the twelfth set value is 90%.

[0089] If the battery pack's SOC is less than the twelfth set value, the regenerative braking system is in normal working condition. At this time, the risk of battery pack overcharging is further reduced, and the vehicle performs regenerative braking normally.

[0090] Therefore, the operating status of the regenerative braking system can be controlled according to the SOC of the battery pack.

[0091] During vehicle braking, the vehicle calculates the basic torque based on the brake pedal depth, driving mode, and current gear. At the same time, it calculates the regenerative braking torque based on the battery pack's state of charge (SOC). The basic torque and the regenerative braking torque together constitute the vehicle's braking torque to brake the vehicle.

[0092] In some embodiments of the present invention, such as Figure 8 As shown, after confirming that the vehicle has entered the motor drive mode, the control method also includes:

[0093] The battery pack's SOC is displayed on the instrument panel according to the SOC control information.

[0094] The vehicle's dashboard displays a variety of vehicle status information. When the battery pack's SOC is high, other status information is displayed first. When the battery pack's SOC is low, the SOC information is displayed first on the dashboard. This allows occupants to have a more intuitive understanding of the battery pack's SOC status, giving them enough time to react and further improving vehicle safety.

[0095] In some embodiments of the present invention, such as Figure 8 As shown, the SOC information displayed on the battery pack's SOC control dashboard includes:

[0096] If the battery pack's State of Charge (SOC) is less than the thirteenth set value but greater than or equal to the fourteenth set value, the SOC is displayed in the center area of ​​the instrument panel. At this point, the battery pack's charge level is determined to be low, and displaying the SOC in the center of the instrument panel allows occupants to more intuitively understand the battery pack's charge status. Preferably, the thirteenth set value is 23%, and the fourteenth set value is 17%.

[0097] If the battery pack's State of Charge (SOC) is less than the fourteenth set value, a prompt to charge the battery pack will appear on the instrument panel. At this point, the battery pack is determined to be in a charging state, and the user can take timely action.

[0098] This enables the display of battery pack SOC information on the control panel based on the battery pack's SOC.

[0099] In some embodiments of the present invention, such as Figure 9 As shown, after obtaining the SOC of the battery pack, the following steps are also included:

[0100] The operating status of the vehicle's high-voltage circuit is controlled based on the state of charge (SOC) of the battery pack.

[0101] After the high-voltage circuit is powered on, the battery pack is electrically connected to the vehicle's high-voltage circuit. The operation of the high-voltage circuit is highly correlated with the battery pack's power consumption. By controlling the operating status of the vehicle's high-voltage circuit based on the battery pack's SOC, the safety of the vehicle during operation and the driving experience of the occupants can be further improved.

[0102] In some embodiments of the present invention, such as Figure 9 As shown, controlling the operating state of the vehicle's high-voltage circuit based on the battery pack's SOC includes:

[0103] If the battery pack's SOC is less than the fifteenth set value, the high-voltage circuit of the vehicle is disconnected, and the DC-DC controller stops working. In this case, the high-voltage circuit remains electrically connected to the battery pack, which may cause the battery pack to become depleted, preventing the vehicle from properly connecting to the high voltage upon the next start. Disconnecting the high-voltage circuit and stopping the DC-DC controller reduces battery pack power consumption and improves vehicle reliability. Preferably, the fifteenth set value is 5%.

[0104] According to a second aspect embodiment of the present invention, a hybrid vehicle is equipped with the control method for a hybrid vehicle according to a first aspect embodiment of the present invention.

[0105] According to a second aspect embodiment of the present invention, the safety of a hybrid vehicle during operation can be improved by applying the control method for a hybrid vehicle according to the first aspect of the present invention.

[0106] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0107] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0108] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0110] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a hybrid vehicle, characterized in that, include: Obtain the SOC of the battery pack; Confirm that the vehicle has entered motor drive mode; The vehicle's maximum speed is controlled based on the battery pack's state of charge (SOC). The method of controlling the vehicle's maximum speed based on the battery pack's SOC includes: If the SOC of the battery pack is less than the first set value and greater than or equal to the second set value, the maximum speed of the vehicle shall be controlled not to exceed the first speed. If the SOC of the battery pack is less than the second set value, the maximum speed of the vehicle is controlled to not exceed the second speed, and the second speed is less than the first speed. After confirming that the vehicle has entered the motor drive mode, the control method further includes: The generator's operating state is controlled according to the battery pack's SOC, and the generator's operating state includes stopping operation, automatic start-stop, and continuous power generation; The method of controlling the generator's operating state based on the battery pack's SOC includes: If the SOC of the battery pack is greater than or equal to the third set value, the generator will be controlled to stop working; If the SOC of the battery pack is less than the third set value and greater than or equal to the fourth set value, the generator is controlled to be in automatic start-stop mode. If the SOC of the battery pack is less than the fourth set value, the generator is controlled to be in continuous power generation mode.

2. The control method for a hybrid vehicle according to claim 1, characterized in that, After confirming that the vehicle has entered the motor drive mode, the control method further includes: The discharge power of the battery pack is controlled based on the state of charge (SOC) of the battery pack.

3. The control method for a hybrid vehicle according to claim 2, characterized in that, The method of controlling the discharge power of the battery pack based on the SOC of the battery pack includes: If the SOC of the battery pack is less than the fifth setting value and greater than or equal to the sixth setting value, the battery pack is controlled to enter a limited discharge state. In the limited discharge state, the discharge power of the battery pack is less than the rated discharge power. If the SOC of the battery pack is less than the sixth set value, the battery pack will stop discharging externally, and the generator will drive the drive motor to run.

4. The control method for a hybrid vehicle according to claim 1, characterized in that, After confirming that the vehicle has entered the motor drive mode, the control method further includes: The output power of the air conditioner is controlled based on the SOC of the battery pack.

5. The control method for a hybrid vehicle according to claim 4, characterized in that, The method of controlling the air conditioner's output power based on the battery pack's SOC includes: If the SOC of the battery pack is less than the seventh setting value and greater than or equal to the eighth setting value, the air conditioner is controlled to enter the heat exchange restriction state. In the heat exchange restriction state, the output power of the air conditioner is less than the rated power. If the SOC of the battery pack is less than the eighth set value, the air conditioner will be turned off.

6. The control method for a hybrid vehicle according to claim 1, characterized in that, After confirming that the vehicle has entered the motor drive mode, the control method further includes: The output power of the drive motor is controlled based on the SOC of the battery pack.

7. The control method for a hybrid vehicle according to claim 6, characterized in that, The control of the drive motor's output power based on the battery pack's SOC includes: If the SOC of the battery pack is less than the ninth set value and greater than or equal to the tenth set value, the drive motor is controlled to enter the restricted drive state. In the restricted drive state, the output power of the drive motor is less than the rated power. If the SOC of the battery pack is less than the tenth set value, the drive motor will stop working and the vehicle will exit the motor drive mode.

8. The control method for a hybrid vehicle according to claim 1, characterized in that, After confirming that the vehicle has entered the motor drive mode, the control method further includes: The operating state of the regenerative braking system is controlled according to the SOC of the battery pack. The operating states of the regenerative braking system include stopped operation, limited regeneration, and normal operation.

9. The control method for a hybrid vehicle according to claim 8, characterized in that, The method of controlling the operating state of the regenerative braking system based on the SOC of the battery pack includes: If the SOC of the battery pack is greater than or equal to the eleventh set value, the regenerative braking system will stop working. If the SOC of the battery pack is less than the eleventh set value and greater than or equal to the twelfth set value, the regenerative braking system is in a limited regeneration state, in which the regenerative braking torque is less than the rated torque. If the SOC of the battery pack is less than the twelfth set value, the regenerative braking system is in normal working condition.

10. The control method for a hybrid vehicle according to claim 1, characterized in that, After confirming that the vehicle has entered the motor drive mode, the control method further includes: The battery pack's SOC is displayed on the instrument panel according to the SOC control information.

11. The control method for a hybrid vehicle according to claim 10, characterized in that, The prompt information displayed on the instrument panel based on the battery pack's SOC includes: If the SOC of the battery pack is less than the thirteenth setting value and greater than or equal to the fourteenth setting value, the SOC of the battery pack will be displayed in the middle area of ​​the instrument panel. If the battery pack's SOC is less than the fourteenth set value, a prompt will appear on the instrument panel indicating that the battery pack needs to be charged.

12. The control method for a hybrid vehicle according to claim 1, characterized in that, Following the acquisition of the battery pack's SOC, the following is also included: The operating status of the vehicle's high-voltage circuit is controlled based on the state of charge (SOC) of the battery pack.

13. The control method for a hybrid vehicle according to claim 12, characterized in that, The method of controlling the operating status of the vehicle's high-voltage circuit based on the battery pack's SOC includes: If the SOC of the battery pack is less than the fifteenth set value, the high-voltage circuit of the vehicle will be disconnected and the DC-DC controller will stop working.

14. A hybrid vehicle, characterized in that, The control method for a hybrid vehicle according to any one of claims 1-13.

Images