Automobile battery charging and discharging conversion transient control method, computer device and automobile

Abstract

The application discloses a car battery charging and discharging conversion transient control method, computer equipment and a car, input the last moment of charging and discharging data, charging and discharging data includes target charging and discharging power, instantaneous charging and discharging state and zero power holding time;Get steady-state target charging and discharging power;Determine the real-time theoretical output target charging and discharging power of the current moment;Determine the charging and discharging conversion flag of the current moment;Set the charging and discharging conversion time threshold, determine the charging and discharging data of the current moment;Power battery executes the target charging and discharging power in the current moment of charging and discharging data;The charging and discharging data of the current moment is input to the next moment, repeat the above steps.When the power battery charging and charging are converted to each other, the 0 power point is kept for a set time;Avoid the direct reverse of the internal chemical reaction of the power battery, improve the working life and reliability of the power battery;When the current moment target charging and discharging power does not charge and discharge conversion, it stably follows the steady-state target charging and discharging power.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of extended-range electric vehicles, and more particularly relates to a method for transient control of battery charging and discharging of a vehicle, a computer device and a vehicle. BACKGROUND

[0002] With the development of electric vehicle technology, the current extended-range electric vehicle is an important structure for driving. The existing charging and discharging process of the extended-range electric vehicle is as follows: the power battery can be charged through the range extender, and at the same time, the power battery current is in real time provided to the driving motor energy; therefore, the power battery is in the process of uninterrupted charging and discharging. This leads to the fact that the power battery is prone to direct and rapid reverse of the internal chemical reaction when charging and discharging are converted, which in turn reduces the service life and working reliability of the power battery. SUMMARY

[0003] In view of the above defects or improvement needs of the prior art, the present application provides a method for transient control of battery charging and discharging of a vehicle, a computer device and a vehicle, which avoids direct conversion of the charging and discharging process of the power battery, and can improve the service life and reliability of the power battery; at the same time, it can smoothly follow the steady-state target charging and discharging power.

[0004] To achieve the above-mentioned purpose, according to one aspect of the present application, a method for transient control of battery charging and discharging of a vehicle is provided, characterized in that:

[0005] inputting the charging and discharging data of the last moment, the charging and discharging data including the target charging and discharging power, the instantaneous charging and discharging state and the zero-power holding time;

[0006] obtaining the steady-state target charging and discharging power;

[0007] determining the real-time theoretical output target charging and discharging power of the current moment according to the charging and discharging data of the last moment and the steady-state target charging and discharging power;

[0008] determining the charging and discharging conversion flag of the current moment according to the real-time theoretical output target charging and discharging power of the current moment;

[0009] setting a charging and discharging conversion time threshold, and determining the charging and discharging data of the current moment according to the real-time theoretical output target charging and discharging power of the current moment, the charging and discharging conversion time threshold, the charging and discharging conversion flag, and the charging and discharging data of the last moment;

[0010] the power battery executes the target charging and discharging power in the charging and discharging data of the current moment;

[0011] inputting the charging and discharging data of the current moment into the next moment, and repeating the above steps.

[0012] According to the technical solution, the process of determining the charge-discharge data of the previous moment is as follows: firstly, it is determined whether the current moment is an initial moment;

[0013] If it is an initial moment, the charge-discharge data of the previous moment is initialized data;

[0014] If it is not an initial moment, the charge-discharge data of the previous moment is obtained by iteration from the charge-discharge data before the previous moment, and the iteration process is as follows:

[0015] In the adjacent two moments, the target charge-discharge power of the latter moment is determined by the charge-discharge data of the former moment, the instantaneous charge-discharge state of the latter moment and the zero-power holding time of the power battery are determined by the target charge-discharge power of the latter moment, and the charge-discharge data of the previous moment is determined.

[0016] According to the technical solution, the initialization data is assigned, and the charge-discharge data of the previous moment is as follows:

[0017]

[0018] Among them, is the instantaneous charge-discharge state of the previous moment, is the target charge-discharge power of the previous moment, is the zero-power holding time of the previous moment.

[0019] According to the technical solution, the process of determining the real-time theoretical output target charge-discharge power of the current moment is as follows:

[0020]

[0021] Among them, is the real-time theoretical output target charge-discharge power, is a smoothing coefficient, is a steady-state target charge-discharge power, is an instantaneous target charge-discharge power. Based on the target charge-discharge power of the previous moment of the power battery , the steady-state target charge-discharge power of the power battery , the real-time theoretical output target charge-discharge power of the current moment of the power battery is calculated. The real-time theoretical output target charge-discharge power of the current moment of the power battery is equal to the obtained value 1 plus the obtained value 2. Wherein, the obtained value 1 is equal to the instantaneous target charge-discharge power P(K-1) of the previous moment of the power battery multiplied by the smoothing coefficient γ, and the obtained value 2 is equal to 1 minus the obtained value multiplied by the steady-state target charge-discharge power of the power battery.

[0022] According to the technical solution, the process of determining the charge-discharge conversion flag of the current moment is as follows:

[0023]

[0024] wherein: is the current instantaneous charge-discharge conversion flag, is the previous instantaneous charge-discharge state, is the current instantaneous real-time theoretical charge-discharge state; based on the real-time theoretical charge-discharge state of the power battery , the previous instantaneous charge-discharge state of the power battery calculates the charge-discharge conversion flag of the power battery . The charge-discharge conversion flag of the power battery is equal to the real-time theoretical charge-discharge state of the power battery multiplied by the previous instantaneous charge-discharge state of the power battery .

[0025] For the real-time theoretical charge-discharge state of the current instantaneous :

[0026]

[0027] wherein: is the real-time theoretical output target charge-discharge power. Based on the real-time theoretical output target charge-discharge power of the power battery obtains the real-time theoretical charge-discharge state of the power battery . If the real-time theoretical output target charge-discharge power of the power battery is greater than zero, the real-time theoretical charge-discharge state of the power battery takes the value of 1, in the discharging state; if the real-time theoretical output target charge-discharge power of the power battery is equal to zero, the real-time theoretical charge-discharge state of the power battery takes the value of 0, in the state of not charging and not discharging; if the real-time theoretical output target charge-discharge power of the power battery is less than zero, the real-time theoretical charge-discharge state of the power battery takes the value of -1, in the charging state.

[0028] According to the above technical solution, the process of determining the target charge-discharge power of the current instantaneous is as follows:

[0029]

[0030] wherein, is the target charge-discharge power of the current instantaneous; is the charge-discharge conversion time threshold, which is a calibrated value.

[0031] based on the charge-discharge conversion flag of the current instantaneous of the power battery , the zero-power holding time of the previous instantaneous of the power battery , the real-time theoretical output target charge-discharge power of the current instantaneous of the power battery Calculate the current instantaneous target charging and discharging power of the power battery .

[0032] If the current instantaneous charge / discharge conversion indicator of the power battery If the value is 1, then the charging and discharging state of the power battery does not need to be changed, and the current instantaneous target charging and discharging power of the power battery is... Equals the real-time theoretical output target charge and discharge power of the power battery .

[0033] If the current instantaneous charge / discharge conversion indicator of the power battery If the value is 0, then the real-time theoretical output target charge / discharge power of the power battery is 0, and the current instantaneous target charge / discharge power of the power battery is... It equals 0.

[0034] If the current instantaneous charge / discharge conversion indicator of the power battery The value is -1, and the zero-power hold-up time of the power battery at the previous instant is... Less than the charge-discharge conversion time threshold If the charging and discharging state of the power battery needs to be switched, but the zero-power hold-up time of the power battery does not meet the requirements, the current instantaneous target charging and discharging power of the power battery... It equals 0.

[0035] If the current instantaneous charge / discharge conversion indicator of the power battery The value is -1, and the zero-power hold-up time of the power battery at the previous instant is... Not less than the charge / discharge conversion time threshold Then the charging and discharging state of the power battery needs to be switched, and the zero-power hold-up time of the power battery has met the requirements. The current instantaneous target charging and discharging power of the power battery... Equals the real-time theoretical output target charge and discharge power of the power battery .

[0036] According to the above technical solution, the process of determining the instantaneous charge / discharge state at the current moment is as follows:

[0037]

[0038] in, This refers to the instantaneous charge / discharge state at the previous instant. The instantaneous charge-discharge state of the current moment is an instantaneous charge-discharge state of the current moment; the process is based on the current moment target charge-discharge power of the power battery to update the current moment charge-discharge state of the power battery. If the current moment target charge-discharge power of the power battery is greater than zero, the current moment charge-discharge state of the power battery is 1, in the discharge state; if the current moment target charge-discharge power of the power battery is less than zero, the current moment charge-discharge state of the power battery is -1, in the charging state; if the current moment target charge-discharge power of the power battery is 0, the current moment charge-discharge state of the power battery is not updated.

[0039] The process of determining the zero-power holding time of the current moment is as follows:

[0040]

[0041] Wherein, is the zero-power holding time of the last moment, is the zero-power holding time of the current moment, and T is the duration of a moment. Based on the current moment target charge-discharge power of the power battery The zero-power holding time of the current moment of the power battery is updated . If the current moment target charge-discharge power of the power battery is equal to zero, the zero-power holding time of the current moment of the power battery is increased by the task execution period T; if the current moment target charge-discharge power of the power battery is not equal to zero, the zero-power holding time of the current moment of the power battery is assigned a value of 0.

[0042] According to the above technical solution, the acquisition process of the smoothing coefficient is as follows:

[0043]

[0044] Wherein: is the smoothing coefficient, is the task execution period; is the steady-state target charge-discharge power of the battery; is the allowable power change of the power battery per unit time, is the inherent parameter of the power battery; is the instantaneous target charge-discharge power of the last moment. Based on the steady-state target charge-discharge power of the power battery , the instantaneous target charge-discharge power of the power battery of the last moment , the allowable power change of the power battery per unit time , and the task execution period , the smoothing coefficient is calculated.

[0045] According to the technical scheme, the steady-state target charging and discharging power is obtained according to the temperature of the power battery, the SOC value of the power battery and the required charging and discharging power.

[0046] According to another aspect of the present application, a computer device is provided, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned automobile battery charging and discharging conversion transient control method when executing the computer program.

[0047] According to another aspect of the present application, an automobile is provided, which is a range-extended electric vehicle, and the computer device is arranged in the automobile.

[0048] Overall, compared with the prior art, the above technical scheme conceived by the present application can achieve the following beneficial effects:

[0049] Based on the charging and discharging data of the previous instant, in combination with the obtained steady-state target charging and discharging power, the real-time theoretical output target charging and discharging power of the current instant is output, and the theoretical charging and discharging state of the current instant is determined. If the theoretical charging and discharging state of the current instant and the actual charging and discharging state of the previous instant are determined to exist charging state conversion to discharging state or discharging state conversion to charging state, then from the current instant, the theoretical charging and discharging state of the next multiple consecutive instants is the same as that of the current instant, and the time length of all instants with the same theoretical charging and discharging state is greater than the charging and discharging conversion time threshold. In all the above instants with the same theoretical charging and discharging state, the target charging and discharging power is 0.

[0050] Based on the above measures, when the power battery charging and discharging are converted to each other, the 0 power point is maintained for a set time length, which is greater than the charging and discharging conversion time threshold; the direct conversion of the power battery from charging to discharging process is avoided, thereby avoiding the direct reverse of the internal chemical reaction of the power battery, and the working life and reliability of the power battery can be improved; at the same time, when the current instant target charging and discharging power of the power battery does not convert from charging to discharging, it can also smoothly follow the steady-state target charging and discharging power. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a flow provided by an embodiment of the present application Figure 1 ;

[0052] Figure 2 is a flow provided by an embodiment of the present application Figure 2 ;

[0053] Figure 3 is a structural schematic diagram of a computer device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0056] In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0057] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or simply means that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or simply means that the first feature is lower than the second feature in horizontal height.

[0059] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0060] Embodiment one (method embodiment)

[0061] The control process at the first instant is as follows:

[0062] First step: initialization data assignment of charge and discharge data of the last moment, the process is as follows:

[0063] Among them, is the initialized instantaneous charge and discharge state, is the initialized instantaneous target charge and discharge power, is the initialized zero power holding time.

[0064] Second step: obtain steady-state target charge and discharge power The process of obtaining the steady-state target charge and discharge power is as follows: according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power, the process has a variety of prior art solutions. Among them, the steady-state target charge and discharge power can be regarded as a fixed value in the continuous two moments.

[0065] Third step: calculate the real-time theoretical output target charge and discharge power of the first moment, the process is as follows:

[0066]

[0067] Among them, is the real-time theoretical output target charge and discharge power of the first moment, is the smoothing coefficient, is the steady-state target charge and discharge power of the current moment, is the initialized instantaneous target charge and discharge power.

[0068] The process of obtaining the smoothing coefficient is as follows:

[0069]

[0070] wherein: is a smoothing coefficient, is a task execution cycle; is a battery steady-state target charge-discharge power; is a power battery allowable power change per unit time, is a power battery inherent parameter; is an initialized instantaneous target charge-discharge power.

[0071] Step 4: determining the first instantaneous charge-discharge conversion flag, the process being as follows:

[0072]

[0073] wherein: is the first instantaneous charge-discharge conversion flag, is an initialized instantaneous charge-discharge state, is a first instantaneous real-time theoretical charge-discharge state;

[0074] for the first instantaneous real-time theoretical charge-discharge state :

[0075]

[0076] wherein: is a real-time theoretical output target charge-discharge power.

[0077] Step 5: determining the first instantaneous charge-discharge data, the process being as follows:

[0078] The process of the first instantaneous target charge-discharge power is as follows:

[0079]

[0080] wherein, is the first instantaneous target charge-discharge power; is a charge-discharge conversion time threshold value, the charge-discharge conversion time threshold value being a calibration value.

[0081] The process of the first instantaneous instantaneous charge-discharge state is as follows:

[0082]

[0083] wherein, is an initialized instantaneous charge-discharge state, is the first instantaneous instantaneous charge-discharge state;

[0084] The process of determining the first instantaneous zero-power holding time is as follows:

[0085]

[0086] wherein, is the zero power holding time for initialization, is the zero power holding time for the first instant, and T is the duration of an instant.

[0087] Step 6: At the first instant, the power battery executes the first-instant target charge-discharge power .

[0088] Step 7: The first-instant charge-discharge data calculated in Step 5 is input into the second instant.

[0089] The control process at the second instant is as follows:

[0090] Step 1: Obtain the first-instant charge-discharge data.

[0091] Step 2: Obtain the steady-state target charge-discharge power , which is determined according to the temperature of the power battery, the SOC value of the power battery, and the required charge-discharge power. There are various existing technical solutions for this process. The steady-state target charge-discharge power can be considered as a fixed value in two consecutive instants.

[0092] Step 3: Calculate the real-time theoretical output target charge-discharge power of the second instant, which is calculated as follows:

[0093]

[0094] wherein, is the real-time theoretical output target charge-discharge power of the second instant, is the smoothing coefficient, is the steady-state target charge-discharge power of the current instant, is the first-instant target charge-discharge power.

[0095] The smoothing coefficient is calculated as follows:

[0096]

[0097] wherein: is the smoothing coefficient, is the task execution period; is the battery steady-state target charge-discharge power; is the allowed power change of the power battery per unit time, is the inherent parameter of the power battery; is the first-instant target charge-discharge power.

[0098] Fourth step: determining the charge-discharge conversion flag of the second moment, the process is as follows:

[0099]

[0100] Wherein: is the charge-discharge conversion flag of the second moment, is the instantaneous charge-discharge state of the first moment, is the real-time theoretical charge-discharge state of the second moment;

[0101] For the real-time theoretical charge-discharge state of the second moment :

[0102]

[0103] Wherein: is the real-time theoretical output target charge-discharge power.

[0104] Fifth step: determining the charge-discharge data of the second moment, the process is as follows:

[0105] The process of the target charge-discharge power of the second moment is as follows:

[0106]

[0107] Wherein, is the target charge-discharge power of the second moment; is the charge-discharge conversion time threshold, and the charge-discharge conversion time threshold is a calibration value.

[0108] The process of the instantaneous charge-discharge state of the second moment is as follows:

[0109]

[0110] Wherein, is the instantaneous charge-discharge state of the first moment, is the instantaneous charge-discharge state of the second moment;

[0111] The process of determining the zero-power holding time of the second moment is as follows:

[0112]

[0113] Wherein, is the zero-power holding time of the first moment, is the zero-power holding time of the second moment, and T is the duration of a moment.

[0114] Sixth step: in the second moment, the power battery executes the target charge-discharge power of the second moment .

[0115] Step 7: input the second moment of charge and discharge data calculated in step 5 into the third moment.

[0116] The control process at the Kth instant is as follows:

[0117] Step 1: obtain the charge and discharge data of the K-1 moment.

[0118] Step 2: obtain the steady-state target charge and discharge power The process of obtaining the steady-state target charge and discharge power is as follows: according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power, the process has a variety of existing technical solutions. Among them, the steady-state target charge and discharge power can be regarded as a fixed value in the continuous two moments.

[0119] Step 3: calculate the real-time theoretical output target charge and discharge power of the K moment, the process is as follows:

[0120]

[0121] Among them, is the real-time theoretical output target charge and discharge power of the K moment, is the smoothing coefficient, is the steady-state target charge and discharge power of the current moment, is the momentary target charge and discharge power of the K-1 moment.

[0122] The process of obtaining the smoothing coefficient is as follows:

[0123]

[0124] Among them: is the smoothing coefficient, is the task execution period; is the battery steady-state target charge and discharge power; is the allowable power change of the power battery per unit time, is the inherent parameter of the power battery; is the momentary target charge and discharge power of the second moment.

[0125] Step 4: determine the charge and discharge conversion flag of the K moment, the process is as follows:

[0126]

[0127] Among them: is the charge and discharge conversion flag of the K moment, is the momentary charge and discharge state of the K-1 moment, is the real-time theoretical charge and discharge state of the K moment;

[0128] Real-time theoretical state of charge at the Kth instant :

[0129]

[0130] wherein: is the real-time theoretical output target charge-discharge power at the Kth instant.

[0131] Fifth step: determining the charge-discharge data at the Kth instant, the process being as follows:

[0132] Process of the target charge-discharge power at the Kth instant:

[0133]

[0134] wherein, is the target charge-discharge power at the Kth instant; is the charge-discharge conversion time threshold, the charge-discharge conversion time threshold being a calibration value.

[0135] Process of the instantaneous charge-discharge state at the Kth instant:

[0136]

[0137] wherein, is the instantaneous charge-discharge state at the K-1th instant, is the instantaneous charge-discharge state at the Kth instant;

[0138] Process of determining the zero-power holding time at the Kth instant:

[0139]

[0140] wherein, is the zero-power holding time at the K-1th instant, is the zero-power holding time at the Kth instant, T being the duration of an instant.

[0141] Sixth step: at the Kth instant, the power battery executes the target charge-discharge power at the Kth instant .

[0142] Seventh step: inputting the charge-discharge data at the Kth instant calculated in the fifth step into the value at the K+1th instant.

[0143] Embodiment two

[0144] As Figure 2Fig. 1 shows a structural schematic diagram of a computer device provided by an embodiment of the present application, such as a smartphone, a tablet computer, a notebook computer, a desktop computer, a rack server, a blade server, a tower server, or a cabinet server (including a single server or a server cluster composed of multiple servers). The computer device 20 of the embodiment includes, but is not limited to, a memory 21 and a processor 22 that can be connected to each other through a system bus, and the like. Figure 2 It should be noted that, Figure 2 Only the computer device 20 with the components 21-22 is shown, but it should be understood that all the shown components are not required to be implemented, and more or fewer components can be alternatively implemented.

[0145] In the embodiment, the memory 21 (i.e., a readable storage medium) includes a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., an SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), and the memory 21 can also be an external storage device of the computer device 20, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. Of course, the memory 21 can also include both an internal storage unit and an external storage device of the computer device 20. In the embodiment, the memory 21 is generally used to store an operating system and various application software installed in the computer device 20, such as program codes of the automobile battery charge-discharge conversion transient control method in the method embodiment, and the like. In addition, the memory 21 can also be used to temporarily store various data that have been output or will be output.

[0146] The processor 22 can be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips in some embodiments. The processor 22 is generally used to control the overall operation of the computer device 20. In the embodiment, the processor 22 is used to run program codes or process data stored in the memory 21, such as running program codes of the automobile battery charge-discharge conversion transient control method, to implement the automobile battery charge-discharge conversion transient control method in the method embodiment.

[0147] Embodiment Three

[0148] The application further provides a computer readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card memory (for example, an SD or DX memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read only memory (ROM), an electrically erasable programmable read only memory (EEPROM), a programmable read only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application market, and the like, which stores a computer program, and the program is executed by a processor to realize corresponding functions. The computer readable storage medium of the embodiment of the automobile battery charging and discharging conversion transient control method program code is executed by the processor to realize the automobile battery charging and discharging conversion transient control method of the method embodiment.

[0149] Embodiment four

[0150] An automobile is provided, which is a range-extended electric vehicle, and the computer device is arranged in the automobile.

[0151] It should be noted that, according to the needs of implementation, each step / component described in the application can be split into more steps / components, or two or more steps / components or part of the operation of the steps / components can be combined into a new step / component, to achieve the purpose of the application.

[0152] Those skilled in the art will readily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling transient state of battery charging and discharging of an automobile, the method comprising: inputting charging and discharging data of a previous time instant, the charging and discharging data comprising a target charging and discharging power, a transient charging and discharging state, and a zero-power holding time; obtaining a steady-state target charging and discharging power; determining a real-time theoretical output target charging and discharging power of a current time instant based on the charging and discharging data of the previous time instant and the steady-state target charging and discharging power; determining a charging and discharging conversion flag of the current time instant based on the real-time theoretical output target charging and discharging power of the current time instant; setting a charging and discharging conversion time threshold, and determining charging and discharging data of the current time instant based on the real-time theoretical output target charging and discharging power of the current time instant, the charging and discharging conversion time threshold, the charging and discharging conversion flag, and the charging and discharging data of the previous time instant; executing the target charging and discharging power in the charging and discharging data of the current time instant by a power battery; inputting the charging and discharging data of the current time instant into a next time instant, and repeating the above steps; wherein the charging and discharging data of the previous time instant is determined as follows: firstly, it is determined whether the current time instant is an initial time instant; if the current time instant is the initial time instant, the charging and discharging data of the previous time instant is initialized data; if the current time instant is not the initial time instant, the charging and discharging data of the previous time instant is determined by iteration of charging and discharging data before the previous time instant, and the iteration process is as follows: in two adjacent time instants, a target charging and discharging power of a later time instant is determined by charging and discharging data of an earlier time instant, a transient charging and discharging state of the later time instant and a zero-power holding time of the power battery are determined by the target charging and discharging power of the later time instant, and the charging and discharging data of the previous time instant is determined accordingly; wherein the real-time theoretical output target charging and discharging power of the current time instant is determined as follows: the initialization data is assigned, and the charging and discharging data of the previous time instant is as follows: the charging and discharging conversion flag of the current time instant is determined as follows: the target charging and discharging power of the current time instant is determined as follows: wherein the target charging and discharging power of the current time instant is determined as follows: wherein the transient charging and discharging state of the current time instant is determined as follows: wherein the zero-power holding time of the current time instant is determined as follows: 5.A method for controlling transient state of battery charging and discharging of an automobile according to claim 4, wherein: the transient charging and discharging state of the current time instant is determined as follows: the zero-power holding time of the current time instant is determined as follows: 6.A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for controlling transient state of battery charging and discharging of an automobile according to any one of claims 1-5. The automobile is a range-extended electric vehicle, and the computer device according to claim 6 is arranged in the automobile. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ wherein is the real-time theoretical output target charge-discharge power for the current instant, is the smoothing coefficient, is the steady-state target charge-discharge power, is the instantaneous target charge-discharge power for the previous instant. The smoothing coefficient The acquisition process is as follows: wherein: is a smoothing coefficient, is a task execution period; is a battery steady-state target charge-discharge power; is a power battery allowable power change per unit time, is a power battery inherent parameter; is an instantaneous target charge-discharge power of the previous instant.

2. The automobile battery charge-discharge conversion transient control method according to claim 1, characterized by: ​ wherein, is an initialized transient charge-discharge state, is an initialized transient target charge-discharge power, is an initialized zero-power hold time.

3. The automotive battery charge-discharge conversion transient control method according to claim 1, characterized by: ​ wherein: is the current instantaneous charge-discharge conversion flag, is the previous instantaneous state of charge-discharge, is the current instantaneous real-time theoretical state of charge-discharge; for the current instant : wherein: is the real-time theoretical output target charge-discharge power for the current instant.

4. The automotive battery charge-discharge conversion transient control method according to claim 3, characterized by: ​ wherein, is the target charge-discharge power for the current instant; is the charge-discharge conversion time threshold, which is a calibration value. ​ ​ wherein, is the instantaneous state of charge at the previous instant, is the instantaneous state of charge at the current instant; ​ wherein Tz is the zero-power holdover time for the previous instant, Tz is the zero-power holdover time for the current instant, and T is the duration of an instant. ​ 7. An automobile characterized by comprising: ​

Images