Method and apparatus for determining target SOC of power battery of hybrid vehicle

Abstract

A method for determining a target SOC of a power battery of a hybrid vehicle, said method comprising: obtaining current associated information, and, on the basis of the current associated information, determining a current lower limit state-of-charge (SOC) and a current upper limit SOC, the current associated information comprising at least part of the following items: a current altitude of the position at which a target hybrid vehicle is currently located, a current grade of the road surface on which the target hybrid vehicle is currently located, a current environmental temperature of the environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state-of-health (SOH) of the power battery; and, on the basis of a current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC, determining a first target SOC of the power battery.

Description

Method and device for determining target SOC of power battery of hybrid vehicle Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a method and device for determining a target SOC of a power battery of a hybrid vehicle, a hybrid vehicle, and a computer-readable storage medium. Background Art

[0002] Hybrid vehicles are equipped with two power sources: a power battery and an engine. The quality of the power battery's energy management directly affects the power, driving feel, etc., and is the key to determining the quality of the user experience. The power battery's state of charge (SOC) is an important parameter of the power battery. For the vehicle controller, determining the target SOC of the power battery is the core of the power battery's energy management. The starting and stopping of the engine and the determination of the engine torque all depend on the target SOC of the hybrid vehicle's power battery. How to more accurately determine the target SOC of the hybrid vehicle's power battery has become a problem that needs to be solved.

[0003] Summary of the Invention

[0004] In view of this, the present application provides a method and apparatus for determining a target SOC of a power battery of a hybrid vehicle, a hybrid vehicle, and a computer-readable storage medium to solve the problem of how to more accurately determine the target SOC of a power battery of a hybrid vehicle.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a target SOC of a power battery of a hybrid vehicle, the method comprising:

[0006] Obtaining current associated information, and determining a current lower limit state of charge (SOC) and a current upper limit state of charge (SOC) based on the current associated information, the current associated information including at least some of the following: a current altitude of a current location of the target hybrid vehicle, a current slope of a road surface on which the target hybrid vehicle is currently located, a current ambient temperature of an environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state of health (SOH) of the power battery;

[0007] A first target SOC of the power battery is determined according to the current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC.

[0008] In one possible implementation, determining the current lower limit SOC and the current upper limit SOC according to the current association information includes:

[0009] Determining a base value of a current lower limit SOC and a base value of a current upper limit SOC according to the current ambient temperature and the current battery temperature;

[0010] determining a correction value of a current lower limit SOC and a correction value of a current upper limit SOC according to the current altitude, the current slope, and the current SOH;

[0011] The current lower limit SOC and the current upper limit SOC are determined according to the base value of the current lower limit SOC, the base value of the current upper limit SOC, the correction value of the current lower limit SOC, and the correction value of the current upper limit SOC.

[0012] In one possible implementation, determining the base value of the current lower limit SOC and the base value of the current upper limit SOC according to the current ambient temperature and the current battery temperature includes:

[0013] determining a minimum value between the current ambient temperature and the current battery temperature;

[0014] Determining a base value of the current lower limit SOC according to the minimum value and a first table, wherein the first table includes lower limit SOC base values ​​corresponding to a plurality of preset temperatures;

[0015] The base value of the current upper limit SOC is determined according to the minimum value and a second table, wherein the second table includes upper limit SOC base values ​​corresponding to a plurality of preset temperatures.

[0016] In one possible implementation, determining the correction value of the current lower limit SOC and the correction value of the current upper limit SOC according to the current altitude, the current slope, and the current SOH includes:

[0017] Finding a first lower limit SOC correction value corresponding to the current altitude and the current slope from a third table, wherein the third table includes first lower limit SOC correction values ​​corresponding to respective preset combinations, the preset combinations including: a preset altitude and a preset slope;

[0018] Finding a second lower limit SOC correction value corresponding to the current SOH from a fourth table, wherein the fourth table includes second lower limit SOC correction values ​​corresponding to a plurality of preset SOHs;

[0019] determining a correction value of the current lower limit SOC according to a first lower limit SOC correction value corresponding to the current altitude and the current slope and a second lower limit SOC correction value corresponding to the current SOH;

[0020] An upper limit SOC correction value corresponding to the current SOH is found from a fifth table, and the upper limit SOC correction value corresponding to the current SOH is determined as the correction value of the current upper limit SOC, wherein the fifth table includes upper limit SOC correction values ​​corresponding to multiple preset SOHs.

[0021] In one possible implementation, determining the current lower limit SOC and the current upper limit SOC according to the base value of the current lower limit SOC, the base value of the current upper limit SOC, the corrected value of the current lower limit SOC, and the corrected value of the current upper limit SOC includes:

[0022] determining a sum of a base value of the current lower limit SOC and a correction value of the current lower limit SOC as the current lower limit SOC;

[0023] The sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC is determined as the current upper limit SOC.

[0024] In one possible implementation, determining the first target SOC of the power battery according to the current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC includes:

[0025] When the current actual SOC is greater than or equal to the current upper limit SOC, determining the current upper limit SOC as the first target SOC;

[0026] When the current actual SOC is less than or equal to the current lower limit SOC, determining the current lower limit SOC as the first target SOC;

[0027] When the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, the SOC change magnification corresponding to the current actual SOC is determined according to the difference corresponding to the current actual SOC and the real SOC change amount corresponding to the current actual SOC, and the first target SOC is determined according to the SOC change magnification, wherein the difference is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change amount is determined according to the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is obtained last time.

[0028] In a possible implementation manner, determining the first target SOC according to the SOC change magnification includes:

[0029] When the current actual SOC is greater than the actual SOC of the power battery obtained last time, determining a second target SOC as the first target SOC, wherein the second target SOC is the target SOC of the power battery determined last time;

[0030] When the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than an SOC change rate threshold, determining the current actual SOC as the first target SOC;

[0031] When the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to an SOC change rate threshold, the first target SOC is determined according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

[0032] In a possible implementation, determining the first target SOC according to a current discharge power limit of the power battery and a last acquired discharge power limit of the power battery includes:

[0033] When the current discharge power boundary is the same as the last acquired discharge power boundary of the power battery, determining the current actual SOC as the first target SOC;

[0034] When the current discharge power limit is less than the last acquired discharge power limit of the power battery, the first target SOC is determined according to the second target SOC and the current actual SOC.

[0035] In a second aspect, an embodiment of the present application provides a device for determining a target SOC of a power battery of a hybrid vehicle, the device comprising:

[0036] an acquisition module, configured to acquire current associated information and determine a current lower limit state of charge (SOC) and a current upper limit state of charge (SOC) based on the current associated information, wherein the current associated information includes at least part of the following items: a current altitude of a current location of the target hybrid vehicle, a current slope of a road surface on which the target hybrid vehicle is currently located, a current ambient temperature of an environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state of health (SOH) of the power battery;

[0037] A determination module is configured to determine a first target SOC of the power battery according to a current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC.

[0038] In one possible embodiment, the acquisition module is further used to determine the basic value of the current lower limit SOC and the basic value of the current upper limit SOC based on the current ambient temperature and the current battery temperature; determine the correction value of the current lower limit SOC and the correction value of the current upper limit SOC based on the current altitude, the current slope and the current SOH; determine the current lower limit SOC and the current upper limit SOC based on the basic value of the current lower limit SOC, the basic value of the current upper limit SOC, the correction value of the current lower limit SOC and the correction value of the current upper limit SOC.

[0039] In one possible embodiment, the acquisition module is further used to determine the minimum value between the current ambient temperature and the current battery temperature; determine the basic value of the current lower limit SOC based on the minimum value and a first table, wherein the first table includes lower limit SOC basic values ​​corresponding to multiple preset temperatures; determine the basic value of the current upper limit SOC based on the minimum value and a second table, wherein the second table includes upper limit SOC basic values ​​corresponding to multiple preset temperatures.

[0040] In one possible embodiment, the acquisition module is further used to look up a first lower limit SOC correction value corresponding to the current altitude and the current slope from a third table, wherein the third table includes first lower limit SOC correction values ​​corresponding to multiple preset combinations, and the preset combinations include: preset altitude and preset slope; look up a second lower limit SOC correction value corresponding to the current SOH from a fourth table, wherein the fourth table includes second lower limit SOC correction values ​​corresponding to multiple preset SOHs; determine the correction value of the current lower limit SOC based on the first lower limit SOC correction value corresponding to the current altitude and the current slope and the second lower limit SOC correction value corresponding to the current SOH; look up an upper limit SOC correction value corresponding to the current SOH from a fifth table, and determine the upper limit SOC correction value corresponding to the current SOH as the correction value of the current upper limit SOC, wherein the fifth table includes upper limit SOC correction values ​​corresponding to multiple preset SOHs.

[0041] In one possible implementation, the acquisition module is further configured to determine the sum of the base value of the current lower limit SOC and the correction value of the current lower limit SOC as the current lower limit SOC; and to determine the sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC as the current upper limit SOC.

[0042] In one possible embodiment, the determination module is further configured to, when the current actual SOC is greater than or equal to the current upper limit SOC, determine the current upper limit SOC as the first target SOC; when the current actual SOC is less than or equal to the current lower limit SOC, determine the current lower limit SOC as the first target SOC; when the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, determine the SOC change magnification corresponding to the current actual SOC according to the difference corresponding to the current actual SOC and the real SOC change corresponding to the current actual SOC, and determine the first target SOC according to the SOC change magnification, wherein the difference is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change is determined based on the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is obtained last time.

[0043] In one possible embodiment, the determination module is further used to determine the second target SOC as the first target SOC when the current actual SOC is greater than the actual SOC of the power battery obtained last time, wherein the second target SOC is the target SOC of the power battery determined last time; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than the SOC change rate threshold, determine the current actual SOC as the first target SOC; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to the SOC change rate threshold, determine the first target SOC according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

[0044] In one possible embodiment, the determination module further determines the current actual SOC as the first target SOC when the current discharge power boundary is the same as the discharge power boundary of the power battery obtained last time; and determines the first target SOC based on the second target SOC and the current actual SOC when the current discharge power boundary is less than the discharge power boundary of the power battery obtained last time.

[0045] In a third aspect, an embodiment of the present application provides a hybrid vehicle, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, computer instructions stored in the memory, and the processor executing the method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0046] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method of the above-mentioned first aspect or any corresponding embodiment thereof.

[0047] Beneficial effects of this application:

[0048] The technical solution provided in this application can determine the current lower limit SOC and the current upper limit SOC based on at least part of the current altitude of the target hybrid vehicle's current location, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the target hybrid vehicle's power battery, and the current state of health (SOH) of the power battery, and determine the first target SOC of the power battery based on the current actual SOC, the current lower limit SOC, and the current upper limit SOC of the power battery. The first target SOC is determined more accurately by taking into account various situations, such as when the current actual SOC is greater than or equal to the current upper limit SOC, when the current actual SOC is less than or equal to the current lower limit SOC, and when the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a flow chart of a method for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application;

[0050] FIG2 is a flow chart of another method for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application;

[0051] 3 is a structural block diagram of an apparatus for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application;

[0052] FIG4 is a schematic diagram of the hardware structure of a hybrid vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0054] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Therefore, the illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0055] 1 , which shows a flow chart of a method for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application.

[0056] In the energy management process of the power battery of the target hybrid vehicle, step S101 can be performed periodically. In the time period between the moment when step S101 is performed for the tth time and the moment when step S101 is performed for the t-1th time, the actual SOC of the power battery of the target hybrid vehicle can be periodically obtained. The actual SOC of the power battery of the target hybrid vehicle can be calculated by the unit for calculating the parameters of the battery in the target hybrid vehicle. As an example, the actual SOC of the power battery of the target hybrid vehicle is periodically obtained from the unit for calculating the parameters of the battery in the target hybrid vehicle. As another example, the unit for calculating the parameters of the battery in the target hybrid vehicle periodically sends the actual SOC of the power battery to a bus on the target hybrid vehicle, such as the Controller Area Network bus (CAN for short), and obtains the actual SOC of the power battery from the bus on the target hybrid vehicle.

[0057] During the time period between the moment of step S101 being executed for the tth time and the moment of step S101 being executed for the t-1th time, each time an actual SOC of the power battery of the target hybrid vehicle is obtained, the obtained actual SOC is used as the current actual SOC, and step S102 is executed. Thus, during the time period between the moment of step S101 being executed for the tth time and the moment of step S101 being executed for the t-1th time, S102 is periodically executed to periodically determine the target SOC. Here, t is an integer greater than 1. The second target SOC is relative to the first target SOC. If the first target SOC is the target SOC determined during the process of determining the target SOC for the tth time, the second target SOC may refer to the target SOC determined during the process of determining the target SOC for the t-1th time, wherein t is an integer greater than 1. If the first target SOC is the target SOC determined during the process of determining the target SOC for the first time, the second target SOC may refer to the pre-set starting target SOC.

[0058] In an embodiment of the present application, the current altitude of the target hybrid vehicle's current location, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the power battery of the target hybrid vehicle, and the current SOH of the power battery can all be obtained from corresponding sensors on the target hybrid vehicle or a bus on the target hybrid vehicle, such as a CAN bus.

[0059] In step S101 , current associated information is acquired, and a current lower limit SOC and a current upper limit SOC are determined based on the current associated information.

[0060] The current associated information includes at least part of the following items: the current altitude of the current location of the target hybrid vehicle, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the power battery of the target hybrid vehicle, and the current health status SOH of the power battery.

[0061] The current associated information includes at least part of the following items: the current altitude of the target hybrid vehicle's current location, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the target hybrid vehicle's power battery, and the current SOH of the target hybrid vehicle's power battery.

[0062] The target hybrid vehicle may be any hybrid vehicle. The altitude of the target hybrid vehicle's current location is referred to as the current altitude. The slope of the road on which the target hybrid vehicle is currently located is referred to as the current slope. The temperature of the environment in which the target hybrid vehicle is currently located is referred to as the current ambient temperature.

[0063] As an example, the current associated information includes: the current altitude of the target hybrid vehicle's current location, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the target hybrid vehicle's power battery, and the current SOH of the target hybrid vehicle's power battery.

[0064] As another example, the current associated information includes: the current altitude of the target hybrid vehicle's current location, the current ambient temperature of the target hybrid vehicle's current environment, the current battery temperature of the target hybrid vehicle's power battery, and the current SOH of the target hybrid vehicle's power battery.

[0065] As another example, the current associated information includes: the current slope of the road where the target hybrid vehicle is currently located, the current ambient temperature of the environment where the target hybrid vehicle is currently located, the current battery temperature of the power battery of the target hybrid vehicle, and the current SOH of the power battery of the target hybrid vehicle.

[0066] In step S101 , the current lower limit SOC and the current upper limit SOC are determined according to the current associated information.

[0067] Among them, the current upper limit SOC is greater than the current lower limit SOC.

[0068] In one possible implementation, in order to determine the current lower limit SOC and the current upper limit SOC based on the current association information, a preset table may be pre-built, which includes: a plurality of preset association information and a preset SOC combination corresponding to each preset association information.

[0069] The preset associated information includes at least part of the following items: a preset altitude, a preset slope, a preset ambient temperature, a preset battery temperature, and a preset SOH.

[0070] It should be noted that the types of information items included in the current associated information are the same as the types of information items included in the preset associated information.

[0071] For one preset association information, the preset SOC combination corresponding to the preset association information includes: a preset lower limit SOC corresponding to the preset association information and a preset upper limit SOC corresponding to the preset association information.

[0072] The preset upper limit SOC corresponding to the preset association information is greater than the preset lower limit SOC corresponding to the preset association information.

[0073] When determining the current lower limit SOC and the current upper limit SOC based on the current association information, the similarity between the current association information and each preset association information can be calculated to determine the preset association information with the greatest similarity to the current association information. The preset association information with the greatest similarity to the current association information is recorded as preset association information i, the preset lower limit SOC corresponding to preset association information i is used as the current lower limit SOC, and the preset upper limit SOC corresponding to preset association information i is used as the current upper limit SOC.

[0074] When calculating the similarity between current association information and preset association information, a vector for the current association information may be generated, wherein each item in the current association information corresponds to a component in the vector for the current association information. Simultaneously, a vector for the preset association information may be generated, wherein each item in the preset association information corresponds to a component in the vector for the preset association information. To calculate the similarity between the current association information and the preset association information, the similarity between the vector for the current association information and the vector for the preset association information may be calculated, and the similarity between the vector for the current association information and the vector for the preset association information may be used as the similarity between the current association information and the preset association information.

[0075] Step S102 : determining a first target SOC of the power battery of the target hybrid vehicle according to the current actual SOC of the power battery of the target hybrid vehicle, the current lower limit SOC of the target hybrid vehicle, and the current upper limit SOC of the target hybrid vehicle.

[0076] The first target SOC may be provided to a unit requiring the target SOC on the target hybrid vehicle so that the unit requiring the target SOC performs related operations according to the first target SOC, such as determining engine torque according to the first target SOC.

[0077] When the current actual SOC of the power battery of the target hybrid vehicle is greater than or equal to the current upper limit SOC, the current upper limit SOC is determined as the first target SOC.

[0078] When the current actual SOC of the power battery of the target hybrid vehicle is less than or equal to the current lower limit SOC, the current lower limit SOC is determined as the first target SOC.

[0079] When the current actual SOC of the power battery of the target hybrid vehicle is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, the difference between the current actual SOC of the power battery of the target hybrid vehicle and the actual SOC of the power battery obtained last time is calculated. The difference between the current actual SOC of the power battery of the target hybrid vehicle and the actual SOC of the power battery obtained last time is: the current actual SOC of the power battery minus the actual SOC of the power battery obtained last time.

[0080] When the difference between the current actual SOC of the power battery of the target hybrid vehicle and the last actual SOC of the power battery is greater than or equal to 0, a second target SOC can be determined as the first target SOC of the power battery, where the second target SOC is the last determined target SOC of the power battery. In other words, when the actual SOC of the power battery increases or remains unchanged, the target SOC of the power battery also remains unchanged.

[0081] When the difference between the current actual SOC of the target hybrid vehicle's power battery and the last acquired actual SOC of the power battery is less than 0, the current actual SOC of the target hybrid vehicle's power battery can be determined as the first target SOC of the power battery. In other words, as the actual SOC of the power battery decreases, the target SOC of the power battery follows the current actual SOC of the power battery.

[0082] 2 , which shows a flow chart of another method for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application.

[0083] In step S201, current associated information is obtained, and a corresponding base value is determined based on the current ambient temperature and the current battery temperature in the current associated information. A corresponding correction value is determined based on the current altitude, the current slope, and the current SOH in the current associated information. The current lower limit SOC and the current upper limit SOC are determined based on the corresponding base value and the corresponding correction value.

[0084] The current associated information may include: the current altitude of the target hybrid vehicle's current location, the current slope of the road surface on which the target hybrid vehicle is currently located, the current ambient temperature of the environment in which the target hybrid vehicle is currently located, the current battery temperature of the target hybrid vehicle's power battery, and the current SOH of the target hybrid vehicle's power battery.

[0085] Step S201 includes steps S2011-S2013.

[0086] In step S2011 , a basic value of a current lower limit SOC of the power battery and a basic value of a current upper limit SOC of the power battery are determined according to the current ambient temperature and the current battery temperature.

[0087] Step S2011 may include: step S20111, determining the minimum value between the current ambient temperature and the current battery temperature; step S20112, determining the basic value of the current lower limit SOC according to the minimum value and a first table, wherein the first table includes multiple preset temperatures and the lower limit SOC basic values ​​corresponding to each of the multiple preset temperatures; step S20113, determining the basic value of the current upper limit SOC according to the minimum value and a second table, wherein the second table includes: the multiple preset temperatures and the upper limit SOC basic values ​​corresponding to each of the multiple preset temperatures.

[0088] The basic value of the current upper limit SOC is greater than the basic value of the current lower limit SOC.

[0089] In step S20112, in order to determine the basic value of the current lower limit SOC, the first preset temperature corresponding to the minimum value in the first table can be determined, wherein the first preset temperature is the preset temperature closest to the minimum value in the first table, and the lower limit SOC basic value corresponding to the first preset temperature is determined as the basic value of the current lower limit SOC.

[0090] In step S20113, in order to determine the basic value of the current upper limit SOC, the second preset temperature corresponding to the minimum value in the second table can be determined, wherein the second preset temperature is the preset temperature closest to the minimum value in the second table, and the upper limit SOC basic value corresponding to the second preset temperature is determined as the basic value of the current upper limit SOC.

[0091] In step S2012 , a correction value of a current lower limit SOC of the power battery and a correction value of a current upper limit SOC of the power battery are determined according to the current altitude, the current slope, and the current SOH.

[0092] Step S2012 may include: step S20121, looking up a first lower limit SOC correction value corresponding to the current altitude and the current slope from the third table, wherein the third table includes first lower limit SOC correction values ​​corresponding to multiple preset combinations, and the preset combinations include: preset altitude and preset slope; step S20122, looking up a second lower limit SOC correction value corresponding to the current SOH from the fourth table, wherein the fourth table includes multiple preset SOHs and second lower limit SOC correction values ​​corresponding to multiple preset SOHs; step S20123, determining the correction value of the current lower limit SOC according to the first lower limit SOC correction value corresponding to the current altitude and the current slope and the second lower limit SOC correction value corresponding to the current SOH; step S20124, looking up an upper limit SOC correction value corresponding to the current SOH from the fifth table, and determining the upper limit SOC correction value corresponding to the current SOH as the correction value of the current upper limit SOC, wherein the fifth table includes the multiple preset SOHs and upper limit SOC correction values ​​corresponding to the multiple preset SOHs.

[0093] In step S20121, in order to find the first lower limit SOC correction value corresponding to the current altitude and the current slope from the third table, the current altitude and the current slope can be combined into a current combination. The similarity between the current combination and each preset combination can be calculated, wherein each preset combination belongs to the multiple preset combinations. Determine the preset combination with the greatest similarity to the current combination. The preset combination with the greatest similarity to the current combination is recorded as preset combination j, and the first lower limit SOC correction value corresponding to preset combination j is determined as the first lower limit SOC correction value corresponding to the current altitude and the current slope. When calculating the similarity between the current combination and a preset combination, a vector of the current combination can be generated, wherein each item in the current combination corresponds to a component in the vector of the current combination. At the same time, a vector of the preset combination can be generated, wherein each item in the preset combination corresponds to a component in the vector of the preset combination. To calculate the similarity between the current combination and the preset combination, the similarity between the vector of the current combination and the vector of the preset combination may be calculated, and the similarity between the vector of the current combination and the vector of the preset combination may be used as the similarity between the current combination and the preset combination.

[0094] In step S20122, to find the second lower-limit SOC correction value corresponding to the current SOH from the fourth table, a first preset SOH corresponding to the current SOH in the fourth table may be determined, where the first preset SOH is the preset SOH in the fourth table that is closest to the current SOH. The second lower-limit SOC correction value corresponding to the first preset SOH is determined as the second lower-limit SOC correction value corresponding to the current SOH.

[0095] In step S20123, in order to determine the correction value of the current lower limit SOC, the sum of the first lower limit SOC correction value corresponding to the current altitude and the current slope and the second lower limit SOC correction value corresponding to the current SOH can be calculated, and the sum can be used to determine the correction value of the current lower limit SOC.

[0096] In step S20124, to determine the correction value for the current upper limit SOC, the upper limit SOC correction value corresponding to the current SOH may be found in the fifth table and the upper limit SOC correction value corresponding to the current SOH may be determined as the correction value for the current upper limit SOC. A second preset SOH corresponding to the current SOH may be determined in the fifth table, where the second preset SOH is the preset SOH in the fifth table that is closest to the current SOH. The upper limit SOC correction value corresponding to the second preset SOH is determined as the upper limit SOC correction value corresponding to the current SOH.

[0097] In step S2013 , the current lower limit SOC and the current upper limit SOC are determined based on the base value of the current lower limit SOC, the base value of the current upper limit SOC, the correction value of the current lower limit SOC, and the correction value of the current upper limit SOC.

[0098] Step S2013 may include: determining the sum of the base value of the current lower limit SOC and the correction value of the current lower limit SOC as the current lower limit SOC; and determining the sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC as the current upper limit SOC.

[0099] Step S202 : determining a first target SOC of the power battery of the target hybrid vehicle according to the current actual SOC of the power battery of the target hybrid vehicle, the current lower limit SOC of the target hybrid vehicle, and the current upper limit SOC of the target hybrid vehicle.

[0100] Step S202 includes: step S2021, when the current actual SOC of the power battery of the target hybrid vehicle is greater than or equal to the current upper limit SOC, determining the current upper limit SOC as the first target SOC; step S2022, when the current actual SOC of the power battery of the target hybrid vehicle is less than or equal to the current lower limit SOC, determining the current lower limit SOC as the first target SOC; step S2023, when the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, determining the current lower limit SOC as the first target SOC according to the current actual SOC. The SOC change rate corresponding to the current actual SOC is determined by the difference corresponding to the SOC and the real SOC change corresponding to the current actual SOC, and the first target SOC is determined based on the SOC change rate, wherein the difference corresponding to the current actual SOC is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change is determined based on the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is last obtained.

[0101] As an example, an actual SOC of the power battery is obtained every 10 seconds.

[0102] The difference corresponding to the current actual SOC may be: the current actual SOC minus the actual SOC of the power battery obtained last time.

[0103] In order to calculate the actual SOC change corresponding to the current actual SOC, the product of the voltage of the power battery in the period between the moment of the current actual SOC and the moment of the last acquisition of the actual SOC of the power battery and the current of the power battery in the period between the moment of the current actual SOC and the moment of the last acquisition of the actual SOC of the power battery can be integrated to obtain a result, the capacity of the power battery can be multiplied by a preset coefficient to obtain a product, and the result can be divided by the product to obtain the actual SOC change corresponding to the current actual SOC.

[0104] As an example, the actual SOC change corresponding to the current actual SOC can be calculated using the following formula: ΔSOCact=(∫UI) / 3.6C

[0105] Wherein, ΔSOCact represents the actual SOC change corresponding to the current actual SOC, C represents the capacity of the power battery, U represents the voltage of the power battery during the period between the moment of obtaining the current actual SOC and the moment of last obtaining the actual SOC of the power battery, and I represents the current of the power battery during the period between the moment of obtaining the current actual SOC and the moment of last obtaining the actual SOC of the power battery.

[0106] As an example, in order to calculate the SOC change ratio corresponding to the current actual SOC, the absolute value of the result of subtracting the difference corresponding to the current actual SOC from the real SOC change corresponding to the current actual SOC can be calculated, and the absolute value can be divided by the real SOC change corresponding to the current actual SOC to obtain the SOC change ratio corresponding to the current actual SOC.

[0107] In other words, SOC 3 =|ΔSOCact-ΔSOC| / ΔSOCact;

[0108] Among them, SOC 3 represents the SOC change ratio corresponding to the current actual SOC, ΔSOC represents the difference corresponding to the current actual SOC, and ΔSOCact represents the actual SOC change corresponding to the current actual SOC.

[0109] In step S2023, determining the first target SOC according to the SOC change rate includes: step S20231, when the current actual SOC is greater than the actual SOC of the power battery obtained last time, determining the second target SOC as the first target SOC, wherein the second target SOC is the target SOC of the power battery determined last time; step S20232, when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than the SOC change rate threshold, determining the current actual SOC as the first target SOC; step S20233, when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to the SOC change rate threshold, determining the first target SOC according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

[0110] The power battery's discharge power limit is periodically acquired. As an example, a discharge power limit of the power battery is acquired every 10 seconds. Each time the actual SOC of the power battery is acquired, the power battery's discharge power limit can be acquired simultaneously with the actual SOC of the power battery.

[0111] As an example, the SOC change rate threshold is 1.5. If the current actual SOC of the power battery is greater than the actual SOC of the power battery obtained last time and the SOC change rate corresponding to the current actual SOC is less than 1.5, it can be determined that the SOC change is increasing, the target SOC remains unchanged at the current target, and the second target SOC is determined as the first target SOC. If the current actual SOC of the power battery is greater than the actual SOC of the power battery obtained last time and the SOC change rate is ≥1.5, it can be determined that the SOC change is abnormally increasing, the target SOC remains unchanged at the current target, and the second target SOC is determined as the first target SOC. If the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than 1.5, it can be determined that the SOC change is decreasing, and the first target SOC = the current actual SOC. If the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change ratio is ≥1.5, it can be determined that the SOC change is an abnormal decrease, and the first target SOC is determined based on the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

[0112] Step S20233 may include: when the current discharge power boundary is the same as the discharge power boundary of the power battery obtained last time, determining the current actual SOC as the first target SOC; when the current discharge power boundary is less than the discharge power boundary of the power battery obtained last time, determining the first target SOC based on the second target SOC and the current actual SOC.

[0113] As an example, when the first target SOC is determined according to the second target SOC and the current actual SOC, the first target SOC may be calculated using the following formula: first target SOC=(SOCtar-SOCact)*K+SOCact.

[0114] Wherein, SOCtar represents the second target SOC, SOCact represents the current actual SOC, and K represents the correction coefficient.

[0115] K may be related to the discharge power change rate corresponding to the current discharge power of the power battery. The magnitude of K may be inversely proportional to the magnitude of the discharge power change rate corresponding to the current discharge power of the power battery.

[0116] The discharge power of the power battery may be obtained periodically. Each time the actual SOC of the power battery is obtained, the discharge power of the power battery is obtained simultaneously with the actual SOC of the power battery.

[0117] The discharge power change rate corresponding to the current discharge power of the power battery may be: the absolute value of the difference between the current discharge power of the power battery and the last obtained discharge power divided by the last obtained discharge power of the power battery.

[0118] The present application also provides an apparatus for determining the target SOC of a power battery of a hybrid vehicle in an embodiment. The apparatus is used to implement the above-mentioned method embodiments and preferred embodiments, and the details that have been described will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0119] Referring to FIG3 , which shows a block diagram of a device for determining a target SOC of a power battery of a hybrid vehicle according to an embodiment of the present application, the device for determining a target SOC of a power battery of a hybrid vehicle comprises:

[0120] an acquisition module 301 configured to acquire current associated information and determine a current lower limit state of charge (SOC) and a current upper limit state of charge (SOC) based on the current associated information, wherein the current associated information includes at least some of the following items: a current altitude of a current location of a target hybrid vehicle, a current slope of a road surface on which the target hybrid vehicle is currently located, a current ambient temperature of an environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state of health (SOH) of the power battery;

[0121] The determination module 302 is configured to determine a first target SOC of the power battery according to the current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC.

[0122] In one possible embodiment, the acquisition module 301 is further used to determine the basic value of the current lower limit SOC and the basic value of the current upper limit SOC based on the current ambient temperature and the current battery temperature; determine the correction value of the current lower limit SOC and the correction value of the current upper limit SOC based on the current altitude, the current slope and the current SOH; determine the current lower limit SOC and the current upper limit SOC based on the basic value of the current lower limit SOC, the basic value of the current upper limit SOC, the correction value of the current lower limit SOC and the correction value of the current upper limit SOC.

[0123] In one possible embodiment, the acquisition module 301 is further used to determine the minimum value between the current ambient temperature and the current battery temperature; determine the basic value of the current lower limit SOC based on the minimum value and a first table, wherein the first table includes lower limit SOC basic values ​​corresponding to multiple preset temperatures; determine the basic value of the current upper limit SOC based on the minimum value and a second table, wherein the second table includes upper limit SOC basic values ​​corresponding to multiple preset temperatures.

[0124] In one possible embodiment, the acquisition module 301 is also used to find out the first lower limit SOC correction value corresponding to the current altitude and the current slope from the third table, wherein the third table includes the first lower limit SOC correction value corresponding to each of multiple preset combinations, and the preset combination includes: a preset altitude and a preset slope; find out the second lower limit SOC correction value corresponding to the current SOH from the fourth table, wherein the fourth table includes the second lower limit SOC correction value corresponding to each of multiple preset SOHs; determine the correction value of the current lower limit SOC based on the first lower limit SOC correction value corresponding to the current altitude and the current slope and the second lower limit SOC correction value corresponding to the current SOH; find out the upper limit SOC correction value corresponding to the current SOH from the fifth table, and determine the upper limit SOC correction value corresponding to the current SOH as the correction value of the current upper limit SOC, wherein the fifth table includes the upper limit SOC correction value corresponding to each of multiple preset SOHs.

[0125] In one possible implementation, the acquisition module 301 is further configured to determine the sum of the base value of the current lower limit SOC and the correction value of the current lower limit SOC as the current lower limit SOC; and to determine the sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC as the current upper limit SOC.

[0126] In one possible embodiment, the determination module 302 is further used to determine the current upper limit SOC as the first target SOC when the current actual SOC is greater than or equal to the current upper limit SOC; determine the current lower limit SOC as the first target SOC when the current actual SOC is less than or equal to the current lower limit SOC; when the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, determine the SOC change magnification corresponding to the current actual SOC according to the difference corresponding to the current actual SOC and the real SOC change corresponding to the current actual SOC, and determine the first target SOC according to the SOC change magnification, wherein the difference is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change is determined according to the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is obtained last time.

[0127] In one possible embodiment, the determination module 302 is further used to determine the second target SOC as the first target SOC when the current actual SOC is greater than the actual SOC of the power battery obtained last time, wherein the second target SOC is the target SOC of the power battery determined last time; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than the SOC change rate threshold, determine the current actual SOC as the first target SOC; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to the SOC change rate threshold, determine the first target SOC according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

[0128] In one possible embodiment, the determination module 302 further determines the current actual SOC as the first target SOC when the current discharge power boundary is the same as the discharge power boundary of the power battery obtained last time; when the current discharge power boundary is less than the discharge power boundary of the power battery obtained last time, determines the first target SOC based on the second target SOC and the current actual SOC.

[0129] The device in the embodiment of the present application is presented in the form of a functional unit, where the functional unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0130] Please refer to Figure 4, which is a schematic diagram of the hardware structure of a hybrid vehicle provided in an embodiment of the present application. The hybrid vehicle includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the hybrid vehicle, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple vehicles can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system).

[0131] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0132] The memory 20 stores instructions that can be executed by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0133] The memory 20 may include a program storage area and a data storage area. The program storage area may store an operating system and applications required for at least one function; the data storage area may store data generated based on vehicle usage, etc. Furthermore, the memory 20 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and such remote memory may be connected to the hybrid vehicle via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0134] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0135] The hybrid vehicle further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30, and the output device 40 may be connected via a bus or other means.

[0136] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the hybrid vehicle, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, a pointer, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0137] The hybrid vehicle further includes a communication interface for the hybrid vehicle to communicate with other devices or a communication network.

[0138] The embodiments of the present application also provide a computer-readable storage medium. The above-mentioned method according to the embodiment of the present application can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0139] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A method for determining a target SOC of a power battery of a hybrid vehicle, characterized in that: The method comprises: Obtaining current associated information, and determining a current lower limit state of charge (SOC) and a current upper limit state of charge (SOC) based on the current associated information, the current associated information including at least some of the following: a current altitude of a current location of the target hybrid vehicle, a current slope of a road surface on which the target hybrid vehicle is currently located, a current ambient temperature of an environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state of health (SOH) of the power battery; A first target SOC of the power battery is determined according to the current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC.

2. The method according to claim 1, characterized in that Determining the current lower limit SOC and the current upper limit SOC according to the current association information includes: Determining a base value of a current lower limit SOC and a base value of a current upper limit SOC according to the current ambient temperature and the current battery temperature; determining a correction value of a current lower limit SOC and a correction value of a current upper limit SOC according to the current altitude, the current slope, and the current SOH; The current lower limit SOC and the current upper limit SOC are determined according to the base value of the current lower limit SOC, the base value of the current upper limit SOC, the correction value of the current lower limit SOC, and the correction value of the current upper limit SOC.

3. The method according to claim 2, characterized in that Determining the basic value of the current lower limit SOC and the basic value of the current upper limit SOC according to the current ambient temperature and the current battery temperature includes: determining a minimum value between the current ambient temperature and the current battery temperature; Determining a base value of the current lower limit SOC according to the minimum value and a first table, wherein the first table includes lower limit SOC base values corresponding to a plurality of preset temperatures; The base value of the current upper limit SOC is determined according to the minimum value and a second table, wherein the second table includes upper limit SOC base values corresponding to a plurality of preset temperatures.

4. The method according to claim 2, characterized in that Determining the correction value of the current lower limit SOC and the correction value of the current upper limit SOC according to the current altitude, the current slope, and the current SOH includes: Finding a first lower limit SOC correction value corresponding to the current altitude and the current slope from a third table, wherein the third table includes first lower limit SOC correction values corresponding to respective preset combinations, the preset combinations including: a preset altitude and a preset slope; Finding a second lower limit SOC correction value corresponding to the current SOH from a fourth table, wherein the fourth table includes second lower limit SOC correction values corresponding to a plurality of preset SOHs; determining a correction value of the current lower limit SOC according to a first lower limit SOC correction value corresponding to the current altitude and the current slope and a second lower limit SOC correction value corresponding to the current SOH; An upper limit SOC correction value corresponding to the current SOH is found from a fifth table, and the upper limit SOC correction value corresponding to the current SOH is determined as the correction value of the current upper limit SOC, wherein the fifth table includes upper limit SOC correction values corresponding to multiple preset SOHs.

5. The method according to claim 2, characterized in that Determining the current lower limit SOC and the current upper limit SOC according to the base value of the current lower limit SOC, the base value of the current upper limit SOC, the correction value of the current lower limit SOC, and the correction value of the current upper limit SOC includes: determining a sum of a base value of the current lower limit SOC and a correction value of the current lower limit SOC as the current lower limit SOC; The sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC is determined as the current upper limit SOC.

6. The method according to any one of claims 1 to 5, characterized in that Determining a first target SOC of the power battery according to the current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC includes: When the current actual SOC is greater than or equal to the current upper limit SOC, determining the current upper limit SOC as the first target SOC; When the current actual SOC is less than or equal to the current lower limit SOC, determining the current lower limit SOC as the first target SOC; When the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, the SOC change magnification corresponding to the current actual SOC is determined according to the difference corresponding to the current actual SOC and the real SOC change amount corresponding to the current actual SOC, and the first target SOC is determined according to the SOC change magnification, wherein the difference is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change amount is determined according to the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is obtained last time.

7. The method according to claim 6, characterized in that Determining the first target SOC according to the SOC change rate includes: When the current actual SOC is greater than the actual SOC of the power battery obtained last time, determining a second target SOC as the first target SOC, wherein the second target SOC is the target SOC of the power battery determined last time; When the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than an SOC change rate threshold, determining the current actual SOC as the first target SOC; When the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to an SOC change rate threshold, the first target SOC is determined according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

8. The method according to claim 7, characterized in that Determining the first target SOC according to a current discharge power limit of the power battery and a last acquired discharge power limit of the power battery includes: When the current discharge power boundary is the same as the last acquired discharge power boundary of the power battery, determining the current actual SOC as the first target SOC; When the current discharge power limit is less than the last acquired discharge power limit of the power battery, the first target SOC is determined according to the second target SOC and the current actual SOC.

9. A device for determining a target SOC of a power battery of a hybrid vehicle, characterized in that: The device is installed on a hybrid vehicle, and comprises: an acquisition module, configured to acquire current associated information and determine a current lower limit state of charge (SOC) and a current upper limit state of charge (SOC) based on the current associated information, wherein the current associated information includes at least part of the following items: a current altitude of a current location of the target hybrid vehicle, a current slope of a road surface on which the target hybrid vehicle is currently located, a current ambient temperature of an environment in which the target hybrid vehicle is currently located, a current battery temperature of a power battery of the target hybrid vehicle, and a current state of health (SOH) of the power battery; A determination module is configured to determine a first target SOC of the power battery according to a current actual SOC of the power battery, the current lower limit SOC, and the current upper limit SOC.

10. The device according to claim 9, characterized in that The acquisition module is further configured to determine a base value of the current lower limit SOC and a base value of the current upper limit SOC according to the current ambient temperature and the current battery temperature; and determine a correction value of the current lower limit SOC and a correction value of the current upper limit SOC according to the current altitude, the current slope, and the current SOH; The current lower limit SOC and the current upper limit SOC are determined according to the base value of the current lower limit SOC, the base value of the current upper limit SOC, the correction value of the current lower limit SOC, and the correction value of the current upper limit SOC.

11. The device according to claim 10, characterized in that The acquisition module is also used to determine the minimum value between the current ambient temperature and the current battery temperature; determine the basic value of the current lower limit SOC based on the minimum value and a first table, wherein the first table includes lower limit SOC basic values corresponding to multiple preset temperatures; determine the basic value of the current upper limit SOC based on the minimum value and a second table, wherein the second table includes upper limit SOC basic values corresponding to multiple preset temperatures.

12. The device according to claim 10, characterized in that The acquisition module is also used to find out the first lower limit SOC correction value corresponding to the current altitude and the current slope from the third table, wherein the third table includes the first lower limit SOC correction value corresponding to each of multiple preset combinations, and the preset combination includes: a preset altitude and a preset slope; find out the second lower limit SOC correction value corresponding to the current SOH from the fourth table, wherein the fourth table includes the second lower limit SOC correction value corresponding to each of multiple preset SOHs; determine the correction value of the current lower limit SOC according to the first lower limit SOC correction value corresponding to the current altitude and the current slope and the second lower limit SOC correction value corresponding to the current SOH; find out the upper limit SOC correction value corresponding to the current SOH from the fifth table, and determine the upper limit SOC correction value corresponding to the current SOH as the correction value of the current upper limit SOC, wherein the fifth table includes the upper limit SOC correction value corresponding to each of multiple preset SOHs.

13. The device according to claim 10, characterized in that The acquisition module is further configured to determine the sum of the base value of the current lower limit SOC and the correction value of the current lower limit SOC as the current lower limit SOC; and determine the sum of the base value of the current upper limit SOC and the correction value of the current upper limit SOC as the current upper limit SOC.

14. The device according to any one of claims 9 to 13, characterized in that The determining module is further configured to determine the current upper limit SOC as the first target SOC when the current actual SOC is greater than or equal to the current upper limit SOC; When the current actual SOC is less than or equal to the current lower limit SOC, determining the current lower limit SOC as the first target SOC; When the current actual SOC is greater than the current lower limit SOC and the current actual SOC is less than the current upper limit SOC, the SOC change magnification corresponding to the current actual SOC is determined according to the difference corresponding to the current actual SOC and the real SOC change amount corresponding to the current actual SOC, and the first target SOC is determined according to the SOC change magnification, wherein the difference is the difference between the current actual SOC and the actual SOC of the power battery obtained last time, and the real SOC change amount is determined according to the voltage and current of the power battery and the capacity of the power battery in the period between the time when the current actual SOC is obtained and the time when the actual SOC of the power battery is obtained last time.

15. The device according to claim 14, characterized in that The determination module is further configured to, when the current actual SOC is greater than the actual SOC of the power battery obtained last time, determine the second target SOC as the first target SOC, wherein the second target SOC is the target SOC of the power battery determined last time; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is less than an SOC change rate threshold, determine the current actual SOC as the first target SOC; when the current actual SOC is less than the actual SOC of the power battery obtained last time and the SOC change rate is greater than or equal to an SOC change rate threshold, determine the first target SOC according to the current discharge power boundary of the power battery and the discharge power boundary of the power battery obtained last time.

16. The device according to claim 15, characterized in that The determination module further determines the current actual SOC as the first target SOC when the current discharge power boundary is the same as the discharge power boundary of the power battery obtained last time; and determines the first target SOC based on the second target SOC and the current actual SOC when the current discharge power boundary is less than the discharge power boundary of the power battery obtained last time.

17. A hybrid vehicle, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 8 by executing the computer instructions.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 8.

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