Power battery management method, device and vehicle

Abstract

The present application discloses a power battery management method comprising the following steps: dividing the SOC of a fully charged power battery into multiple continuous numerical intervals; setting corresponding execution plans for each SOC value within each numerical interval, wherein the execution plan corresponding to the lowest numerical interval includes at least controlling the power battery to cut off high voltage; obtaining the real-time SOC value of the power battery and comparing it with the limits of each numerical interval; determining the numerical interval within which the real-time SOC value falls based on the comparison results, and executing the corresponding execution plan. The management method in the present application can reduce the probability of power battery damage due to excessive consumption.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid electric vehicles, and in particular to a method, device and vehicle for managing a power battery. Background Art

[0002] Currently, the use of hybrid vehicles is gradually increasing.

[0003] Compared to traditional vehicles, hybrid vehicles incorporate a series of high-voltage power equipment, including a power motor and a power battery. They also offer expanded functionality, including pure electric propulsion, hybrid power generation, and energy recovery. The power battery provides power to the power motor and stores energy recovered during driving. When the battery capacity, or its state of charge (SOC), is too low, the vehicle's pure electric starting and power-assisted functions will be affected, and the battery life will be adversely affected. Summary of the Invention

[0004] In view of this, the embodiments of the present application hope to provide a power battery management method and vehicle, which can reduce the probability of damage to the power battery due to too low SOC.

[0005] To achieve the above objectives, an embodiment of the present application provides a power battery management method, comprising:

[0006] Dividing the SOC of the power battery in a fully charged state into a plurality of continuous value intervals;

[0007] Setting execution plans corresponding to the state of the power battery's SOC value when it is in each of the value intervals, wherein the execution plan corresponding to the lowest value interval at least includes controlling the power battery to cut off high voltage;

[0008] Obtaining a real-time SOC value of the power battery and comparing it with the limit values ​​of each of the numerical intervals;

[0009] The numerical range in which the real-time SOC value is located is determined according to the comparison result, and the corresponding execution plan is executed.

[0010] In some embodiments, the numerical ranges from high to low specifically include: a first numerical range, a second numerical range, and a third numerical range;

[0011] Among them, when the real-time SOC value is in the first numerical range, the execution plan includes normal discharge of the power battery; when the real-time SOC value is in the second numerical range, the execution plan at least includes limiting the discharge power of the power battery; the third numerical range is the lowest numerical range.

[0012] In some embodiments, the second numerical interval includes a first subinterval, and the first subinterval is continuous with the first numerical interval; and determining the numerical interval in which the real-time SOC value is located based on the comparison result and executing the corresponding execution scheme specifically includes:

[0013] Determining that the real-time SOC value is in the first sub-interval;

[0014] Limit the discharge power of the power battery and control the vehicle to enter limp home mode.

[0015] In some embodiments, the second numerical interval includes a first subinterval and a second subinterval that are continuous from high to low, and the first subinterval is continuous with the first numerical interval; and determining the numerical interval in which the real-time SOC value is located based on the comparison result and executing the corresponding execution scheme specifically includes:

[0016] Determining that the real-time SOC value is in the second subinterval and the power battery is in an uncharged state;

[0017] After controlling the power battery to maintain a current operating state within a preset time, controlling the power battery to cut off high voltage.

[0018] In some embodiments, after controlling the power battery to cut off the high voltage, the method further includes:

[0019] Re-acquiring the real-time SOC value;

[0020] Determining that the real-time SOC value is in the second sub-interval and the power battery is in an uncharged state;

[0021] Control the high voltage on the power battery.

[0022] In some embodiments, the second numerical interval includes a first sub-interval, a second sub-interval, and a third sub-interval that are continuous from high to low, and the first sub-interval is continuous with the first numerical interval; and determining the numerical interval in which the real-time SOC value is located based on the comparison result and executing the corresponding execution scheme specifically includes:

[0023] Determining that the real-time SOC value is in the third subinterval and the power battery is in an uncharged state;

[0024] Obtain the vehicle fuel level, compare the vehicle fuel level with a preset value, and determine a control strategy based on the comparison result.

[0025] In some embodiments, determining a control strategy based on the vehicle fuel level specifically includes:

[0026] Determining that the vehicle fuel level is less than the preset value;

[0027] The power battery is controlled to cut off high voltage and is not allowed to supply high voltage to the power battery.

[0028] In some embodiments, determining a control strategy based on the vehicle fuel level specifically includes:

[0029] Determining that the fuel level of the vehicle is not less than the preset value;

[0030] The engine is controlled to operate and drive the generator to charge the power battery.

[0031] In some embodiments, the second numerical interval includes a first sub-interval, a second sub-interval, a third sub-interval, and a fourth sub-interval that are continuous from high to low, the first sub-interval is continuous with the first numerical interval, and the fourth sub-interval is continuous with the third numerical interval; and determining the numerical interval in which the real-time SOC value is located based on the comparison result and executing the corresponding execution scheme specifically includes:

[0032] determining that the real-time SOC value is in the fourth sub-interval;

[0033] The power battery is controlled to cut off the high voltage and is prohibited from supplying the high voltage again.

[0034] In some embodiments, determining the numerical range of the real-time SOC value according to the comparison result and executing the corresponding execution scheme specifically includes:

[0035] determining that the real-time SOC value is within the third value interval;

[0036] A vehicle fault message is issued, the power battery is controlled to cut off the high voltage, and the power battery is prohibited from being supplied with high voltage again.

[0037] Another aspect of the present application provides a management device, including:

[0038] An acquisition module, configured to acquire a real-time SOC value of the power battery;

[0039] a processing module, configured to compare the real-time SOC value of the power battery with a limit value of a numerical range, and determine the numerical range in which the real-time SOC value is located based on the comparison result;

[0040] The control module is used to control the power battery to cut off the high voltage.

[0041] In another aspect of the embodiments of the present application, a vehicle includes:

[0042] Power battery, used to supply power to the drive motor to drive the vehicle;

[0043] The management device described in the above embodiments.

[0044] The hybrid vehicle power battery management method in the embodiment of the present application first divides the SOC of the power battery in a fully charged state into multiple continuous numerical intervals and sets multiple corresponding execution plans. Then, the real-time SOC value of the power battery during driving is obtained and compared with the limit value of each numerical interval to determine the numerical interval in which the real-time SOC value of the power battery falls. Finally, the execution plan corresponding to the numerical interval is executed. Each execution plan can, on the one hand, issue a corresponding prompt signal to remind the vehicle driver and passengers to pay attention to the current power battery SOC value so that they can charge the power battery in time and reduce the probability of power battery damage due to excessive consumption; on the other hand, the execution plan is executed to reduce the probability of damage caused by excessive power battery SOC consumption. When the execution plan corresponding to the lowest numerical interval is executed, the power battery is controlled to cut off the high voltage to ensure that the power battery SOC does not further deplete, thereby preventing power battery damage due to excessive consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A flowchart of a management method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0047] See Figure 1 In one aspect, an embodiment of the present application provides a method for managing a power battery, the method comprising the following steps:

[0048] S1: Divide the SOC of the fully charged power battery into multiple continuous value intervals.

[0049] For example, the power battery SOC is divided into two continuous value intervals: 0≤SOC value<10% and 10%≤SOC value≤100%.

[0050] S2: setting execution plans corresponding to the respective value intervals of the SOC value of the power battery, wherein the execution plan corresponding to the lowest value interval at least includes controlling the power battery to cut off the high voltage.

[0051] For example, when the power battery SOC is within the numerical range of 10% ≤ SOC value ≤ 100%, the power battery discharges normally; when the power battery SOC is within the numerical range of 0 ≤ SOC value < 10%, the power battery discharge power is limited. Furthermore, the numerical range of 0 ≤ SOC value < 10% can be further divided to form multiple continuous sub-ranges. This allows the power battery's current SOC state to be accurately obtained when the power battery discharge power is limited during driving, facilitating the implementation of targeted measures in subsequent steps.

[0052] Each execution scheme includes sending a prompt signal for reminding occupants of the current SOC value of the power battery.

[0053] Each numerical range is assigned a corresponding execution plan. Each execution plan, on the one hand, can issue a corresponding prompt signal to remind the vehicle driver and passengers to pay attention to the current power battery SOC value, so that people can charge the power battery in a timely manner, reducing the probability of power battery damage due to excessive consumption. On the other hand, the execution plan is executed to reduce the probability of damage caused by excessive power battery SOC consumption. When the execution plan corresponding to the lowest numerical range is executed, that is, when the power battery is in the lowest power range, the execution plan at least includes controlling the power battery high voltage to ensure that the power battery SOC does not further deplete, thereby preventing power battery damage due to excessive consumption.

[0054] S3: Obtain the real-time SOC value of the power battery and compare it with the limit values ​​of each value range.

[0055] It can be understood that during driving, the SOC of the power battery is gradually consumed and its value is gradually reduced. Therefore, the real-time SOC value of the power battery is obtained to ensure precise control of the power battery; the real-time SOC value of the power battery is determined by comparing the real-time SOC value of the power battery with the limit values ​​of each numerical interval to determine the numerical interval in which the real-time SOC value is located.

[0056] S4: Determine the numerical range of the real-time SOC value according to the comparison result, and execute the corresponding execution plan.

[0057] For example, there are two consecutive numerical intervals of the power battery SOC value, namely the first numerical interval 10% ≤ SOC value ≤ 100% and the second numerical interval 5% ≤ SOC value < 10%. The real-time SOC value of the power battery is 8%. The real-time SOC value of the power battery is compared with the limit values ​​of the two numerical intervals, that is, 5% < 8% < 10%, so as to determine that the real-time SOC value of the power battery is in the second numerical interval, and execute the execution plan corresponding to the second numerical interval.

[0058] In the embodiments of the present application, the specific type of vehicle is not limited. A pure electric vehicle or a hybrid vehicle can be used. It only needs to ensure that the power battery can drive the vehicle's drive motor to achieve vehicle travel.

[0059] The specific form of the prompt signal is not limited. For example, a relevant pattern can be displayed through the human-machine interface on the vehicle display device; another example is to control the lights in the vehicle to flash; another example is to control the audio system to emit a warning sound. In this way, the occupants of the vehicle can listen to or see the prompt signal and further respond to the occupants.

[0060] In some embodiments, the numerical intervals from high to low specifically include: a first numerical interval, a second numerical interval, and a third numerical interval; wherein, when the real-time SOC value is in the first numerical interval, the execution plan includes normal discharge of the power battery; when the real-time SOC value is in the second numerical interval, the execution plan at least includes limiting the discharge power of the power battery; the third numerical interval is the lowest numerical interval.

[0061] For example, the SOC of a fully charged power battery can be divided into a first value interval of 10% ≤ SOC value ≤ 100%, a second value interval of 5% ≤ SOC value < 10%, and a third value interval of 0% ≤ SOC value < 5%.

[0062] When the real-time SOC value is in the first numerical range, that is, the numerical range of normal discharge of the power battery, the SOC of the power battery can support the normal operation of the vehicle and has no adverse effect on the power battery itself, so the execution plan includes normal discharge of the power battery to maintain the normal operation of the vehicle.

[0063] When the real-time SOC value is in the second numerical range, although the SOC value is low, the power battery will not be damaged even if the power energy continues to be output. Therefore, by limiting the discharge power of the power battery, the loss rate of power in the power battery is reduced to prevent the SOC value from dropping to the third numerical range too quickly.

[0064] When the real-time SOC value is in the third value range, in order to avoid further damage to the power battery due to excessive consumption, the power battery is controlled to cut off the high voltage.

[0065] In some embodiments, the second numerical interval includes a first sub-interval, and the first sub-interval is continuous with the first numerical interval; determining the numerical interval in which the real-time SOC value is located based on the comparison result, and executing the corresponding execution plan specifically includes: determining that the real-time SOC value is in the second numerical interval; limiting the discharge power of the battery, and controlling the GCU to enter limp mode.

[0066] The first subinterval is continuous with the first numerical interval, that is, no other numerical interval is set between the two. For example, the first numerical interval is 10%≤SOC value≤100%, and the first subinterval is 8%≤SOC value<10%.

[0067] It can be understood that the first subrange is a numerical range where the power battery discharge power is limited. In this case, the vehicle needs to be charged, but the power battery SOC allows the vehicle to operate in limp home mode. Therefore, the corresponding execution scheme for the first subrange is to limit the battery discharge power to limit the vehicle's maximum speed and control the vehicle to enter limp home mode, thereby limiting the speed and torque of the drive motor, reducing energy consumption, and extending the vehicle's remaining range so that the vehicle can continue to travel to a charging station or gas station. In addition, a corresponding prompt signal is issued to remind occupants that the power battery SOC is insufficient and that charging is required.

[0068] In some embodiments, after executing the execution plan corresponding to the first sub-interval, it is determined that the power battery is in a charging state. At this time, the SOC value of the power battery gradually increases, and the real-time SOC value of the power battery is re-obtained. If the real-time SOC value of the power battery increases to the first numerical interval, the execution plan corresponding to the first numerical interval is executed; if the real-time SOC value of the power battery is still in the second numerical interval, the execution plan of the first sub-interval is repeated.

[0069] In other embodiments, after executing the execution plan corresponding to the first sub-interval, it is determined that the power battery is not in a charging state. At this time, if the vehicle continues to travel, the SOC value of the power battery gradually decreases, and the real-time SOC value of the power battery is re-obtained. If the real-time SOC value of the power battery decreases to another lower numerical interval, the execution plan corresponding to the numerical interval is executed; if the real-time SOC value of the power battery is still in the first sub-interval, the execution plan corresponding to the first sub-interval is repeated.

[0070] In some embodiments, the second numerical interval includes a first sub-interval and a second sub-interval that are continuous from high to low, and the first sub-interval is continuous with the first numerical interval; determining the numerical interval in which the real-time SOC value is located based on the comparison result, and executing the corresponding execution plan specifically includes: determining that the real-time SOC value is in a third numerical interval and the power battery is in an uncharged state; after controlling the power battery to maintain the current operating state within a preset time, controlling the power battery to cut off the high voltage.

[0071] The first sub-interval is continuous with the second sub-interval, that is, no other numerical interval is set between them. For example, the first numerical interval is 10% ≤ SOC value ≤ 100%, the first sub-interval is 8% ≤ SOC value < 10%, and the second sub-interval is 5% ≤ SOC value < 8%.

[0072] It can be understood that when the power battery SOC value is in the second sub-interval, the power battery needs to be charged, and the power battery SOC can also ensure that the vehicle can travel in limp mode within the preset time. Then, the execution plan corresponding to the second sub-interval is to first control the vehicle to maintain limp mode within the preset time, and after the preset time interval, the vehicle electronic control unit (VECU) is used to control the power battery to cut off the high voltage and stop the vehicle. In this way, by forcibly stopping the vehicle operation, the consumption of the power battery SOC can be stopped, thereby reducing the probability that the power battery will be damaged due to excessive consumption. In addition, by issuing a corresponding prompt signal to remind the occupants of the vehicle that the power battery SOC is insufficient and the power battery needs to be charged,

[0073] It should be noted that different power battery types, vehicle types, and driving modes correspond to different preset times. The corresponding preset times are calculated through experiments. The specific control variables and test processes involved in the experiments have been widely and maturely applied in related technologies and will not be elaborated here.

[0074] In some embodiments, in the implementation scheme corresponding to the second sub-interval, after controlling the power battery to cut off the high voltage, the method further includes re-acquiring the real-time SOC value of the power battery, and if it is determined that the real-time SOC value of the power battery is within the second sub-interval and the power battery is in an uncharged state, then controlling the power battery to increase the high voltage. In other words, after controlling the power battery to cut off the high voltage, the method re-controls the power battery to increase the high voltage, thereby allowing the vehicle to continue driving in limp mode for a certain distance, further extending its cruising range, and increasing the probability of the vehicle continuing to drive to a charging station or gas station.

[0075] It is understandable that after the real-time SOC value is in the second sub-interval and the high voltage on the power battery is controlled, the real-time SOC value of the power battery will continue to decrease until the real-time SOC value of the power battery decreases to other value intervals.

[0076] In some embodiments, if it is determined that the real-time SOC value of the power battery is within the second sub-range and the power battery is in a charging state, the execution plan corresponding to the second sub-range will continue to be executed until the real-time SOC value of the power battery exceeds the second sub-range. In other words, during the charging process, the SOC value of the power battery will gradually increase, and based on the change in the real-time SOC value, the execution plan corresponding to the numerical range in which the changed SOC value is located will be executed.

[0077] In some embodiments, the second numerical interval includes a first sub-interval, a second sub-interval, and a third sub-interval that are continuous from high to low, and the first sub-interval is continuous with the first numerical interval; determining the numerical interval in which the real-time SOC value is located based on the comparison result, and executing the corresponding execution plan specifically includes: determining that the real-time SOC value is in the third sub-interval and the power battery is in an uncharged state; obtaining the vehicle fuel amount, and comparing the vehicle fuel amount with a preset value, and determining the control strategy based on the comparison result.

[0078] It can be understood that the third sub-interval is a numerical range in which the power battery discharge power is limited. At this time, the power battery needs to be charged. The execution plan corresponding to the third sub-interval is to obtain the vehicle fuel level to determine whether there is sufficient fuel to enable the engine to drive the generator to generate electricity for charging the power battery, so as to avoid the power battery entering an over-consumption state.

[0079] It can be understood that, in the embodiment with the third sub-interval, the vehicle type is a hybrid vehicle.

[0080] In some embodiments, determining a control strategy based on the vehicle's fuel level specifically includes: determining that the vehicle's fuel level is less than a preset value, controlling the power battery to cut off high voltage, and not allowing the power battery to be applied with high voltage. In other words, if the current vehicle fuel level is insufficient to convert into electrical energy to charge the power battery, and the power battery's SOC is insufficient to maintain vehicle travel, the VECU controls the power battery to cut off high voltage, and not allow the power battery to be applied with high voltage, thereby stopping the vehicle and preventing it from restarting. In this way, by forcibly stopping the vehicle's operation, occupants are reminded that the power battery's SOC is insufficient and needs to be charged, while simultaneously stopping the power battery's SOC consumption, thereby reducing the probability of damage to the power battery due to excessive consumption.

[0081] In some embodiments, when it is determined that the vehicle fuel level is not less than a preset value, the engine is controlled to run and the generator is driven to work to charge the power battery. That is to say, the current vehicle fuel level is sufficient to be converted into electrical energy for charging the power battery. The VECU controls the engine to run and drives the generator to work, converting the chemical energy of the fuel into electrical energy to realize charging of the power battery.

[0082] It should be noted that after determining that the vehicle fuel level is not less than the preset value and charging the power battery, if it is determined that the real-time SOC value of the power battery is in the third sub-interval, the execution plan corresponding to the third sub-interval will continue to be executed until the real-time SOC value of the power battery rises to other numerical ranges.

[0083] It should be noted that different power battery types, vehicle types or driving modes correspond to different preset values ​​of vehicle fuel volume. The corresponding vehicle fuel volume is calculated through experiments. The specific control variables and test processes involved in the experiments have been widely and maturely applied in related technologies and will not be elaborated here.

[0084] In some embodiments, the second numerical interval includes a first sub-interval, a second sub-interval, a third sub-interval and a fourth sub-interval that are continuous from high to low, the first sub-interval is continuous with the first numerical interval, and the fourth sub-interval is continuous with the third numerical interval; determining the numerical interval in which the real-time SOC value is located based on the comparison result, and executing the corresponding execution plan specifically includes: determining that the real-time SOC value is in the fourth sub-interval; controlling the power battery to cut off high voltage, and prohibiting the power battery from applying high voltage again.

[0085] It can be understood that the fourth sub-interval is a numerical range where the power battery's discharge power is limited. During this period, the power battery needs to be charged, and the power battery's SOC cannot guarantee vehicle operation. Furthermore, if the power battery's SOC falls below the lower limit of this numerical range, the power battery's SOC falls into the third numerical range, causing excessive consumption and damage to the power battery. Therefore, the implementation plan for the fourth sub-interval is to control the power battery to disconnect high voltage through the VECU and prohibit the power battery from re-connecting high voltage. During this period, the vehicle stops and cannot start driving again, reducing the chance of the power battery's SOC value continuing to decline.

[0086] In some embodiments, the numerical range of the real-time SOC value is determined based on the comparison result, and the corresponding execution plan is executed, specifically including: determining that the real-time SOC value is in the third numerical range; issuing vehicle fault information, controlling the power battery to cut off high voltage, and prohibiting the power battery from applying high voltage again.

[0087] It can be understood that when the real-time SOC value of the power battery is in the third numerical interval, the power battery is over-consumed. Therefore, the execution plan corresponding to the sixth numerical interval is to issue a vehicle fault message to prompt that the power battery needs to be repaired, and directly control the power battery to cut off the high voltage through the battery management system (Battery Management System, BMS), and prohibit the power battery from applying high voltage again, so as to reduce the chance of further deterioration of the power battery fault.

[0088] Another embodiment of the present application provides a management device, comprising an acquisition module, a processing module, and a control module. The acquisition module is used to acquire the real-time SOC value of the power battery; the processing module is used to compare the real-time SOC value of the power battery with the limit of the numerical range and determine the numerical range in which the real-time SOC value falls based on the comparison result; and the control module is used to control the high voltage of the power battery.

[0089] In some embodiments, the acquisition device is used to obtain the real-time SOC value of the power battery and the amount of fuel in the vehicle.

[0090] In some embodiments, the processing module can be used to compare the real-time SOC value of the power battery with the limit of the numerical range, and determine the numerical range in which the real-time SOC value is located based on the comparison result; it can be used to compare the vehicle fuel amount with a preset value; and it can be used to determine whether the power battery is in a charging state.

[0091] In some embodiments, the control module includes a vehicle electronic control unit and a battery management system. The vehicle electronic control unit is used to control the power battery to cut off high voltage, allow the power battery to apply high voltage, and stop the power battery from applying high voltage; the battery management system is used to control the power battery to cut off high voltage and prohibit the power battery from applying high voltage again.

[0092] Another embodiment of the present application provides a vehicle, comprising a power battery and the management device of any one of the aforementioned embodiments. The power battery is used to supply power to a drive motor to drive the vehicle.

[0093] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction. The above description is only a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, this application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A power battery management method, characterized in that: include: Dividing the SOC of the power battery in a fully charged state into a plurality of continuous value intervals; Setting execution plans corresponding to the state of the power battery's SOC value when it is in each of the value intervals, wherein the execution plan corresponding to the lowest value interval at least includes controlling the power battery to cut off high voltage; Obtaining a real-time SOC value of the power battery and comparing it with the limit values ​​of each of the numerical intervals; Determining the numerical range of the real-time SOC value according to the comparison result, and executing the corresponding execution plan; The numerical intervals from high to low specifically include: a first numerical interval, a second numerical interval, and a third numerical interval, the third numerical interval being the lowest numerical interval; the second numerical interval includes a first subinterval, a second subinterval, and a third subinterval consecutive from high to low, the first subinterval being continuous with the first numerical interval; and determining the numerical interval in which the real-time SOC value is located based on the comparison result and executing the corresponding execution scheme specifically includes: Determining that the real-time SOC value is in the third subinterval and the power battery is in an uncharged state; Obtaining a vehicle fuel level, and comparing the vehicle fuel level with a preset value; It is determined that the fuel amount of the vehicle is less than the preset value, the power battery is controlled to cut off the high voltage, and the power battery is not allowed to be supplied with high voltage.

2. The management method according to claim 1, characterized in that: When the real-time SOC value is within the first numerical range, the execution plan includes normal discharge of the power battery.

3. The management method according to claim 1, characterized in that: The step of determining the numerical range of the real-time SOC value according to the comparison result and executing the corresponding execution scheme further includes: Determining that the real-time SOC value is in the first sub-interval; Limit the discharge power of the power battery and control the vehicle to enter limp home mode.

4. The management method according to claim 1, characterized in that: The step of determining the numerical range of the real-time SOC value according to the comparison result and executing the corresponding execution scheme further includes: Determining that the real-time SOC value is in the second subinterval and the power battery is in an uncharged state; After controlling the power battery to maintain a current operating state within a preset time, controlling the power battery to cut off high voltage.

5. The management method according to claim 4, characterized in that: After the control of cutting off the high voltage of the power battery, the method further includes: Re-acquiring the real-time SOC value; Determining that the real-time SOC value is in the second sub-interval and the power battery is in an uncharged state; Control the high voltage on the power battery.

6. The management method according to claim 1, characterized in that: The control strategy determined according to the vehicle fuel quantity further includes: Determining that the fuel level of the vehicle is not less than the preset value; The engine is controlled to operate and drive the generator to charge the power battery.

7. The management method according to claim 1, characterized in that: The second numerical interval further includes a fourth subinterval, and the fourth subinterval is continuous with the third numerical interval; The step of determining the numerical range of the real-time SOC value according to the comparison result and executing the corresponding execution scheme further includes: determining that the real-time SOC value is in the fourth sub-interval; The power battery is controlled to cut off the high voltage and is prohibited from supplying the high voltage again.

8. The management method according to claim 1, characterized in that: The step of determining the numerical range of the real-time SOC value according to the comparison result and executing the corresponding execution scheme further includes: determining that the real-time SOC value is within the third value interval; A vehicle fault message is issued, the power battery is controlled to cut off the high voltage, and the power battery is prohibited from being supplied with high voltage again.

9. A management device, using the management method according to any one of claims 1 to 8, characterized in that: include: An acquisition module, configured to acquire a real-time SOC value of the power battery; a processing module, configured to compare the real-time SOC value of the power battery with a limit value of a numerical range, and determine the numerical range in which the real-time SOC value is located based on the comparison result; The control module is used to control the power battery to cut off the high voltage.

10. A vehicle, characterized in that: include: Power battery, used to supply power to the drive motor to drive the vehicle; The management device according to claim 9.

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