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

Abstract

The invention discloses a transient control method for charging and discharging conversion of an automobile battery, computer equipment and an automobile, and the method comprises the steps: inputting the charging and discharging data of the last moment, and enabling the charging and discharging data to comprise target charging and discharging power, an instantaneous charging and discharging state and zero power retention time; obtaining steady-state target charging and discharging power; determining current instantaneous real-time theoretical output target charging and discharging power; determining a current instantaneous charging and discharging conversion mark; setting a charging and discharging conversion time threshold value, and determining current instantaneous charging and discharging data; the power battery executes target charging and discharging power in the current instantaneous charging and discharging data; and inputting the current instantaneous charging and discharging data into the next instantaneous charging and discharging data, and repeating the steps. When charging and charging of the power battery are mutually converted, a set duration is kept at a zero power point; direct reversion of chemical reaction in the power battery is avoided, and the service life and reliability of the power battery are improved; and when the current instantaneous target charging and discharging power is not subjected to charging and discharging conversion, the current instantaneous target charging and discharging power stably follows the steady-state target charging and discharging power.

Description

Technical Field

[0001] The present invention belongs to the technical field of extended-range electric vehicles, and more specifically, relates to a transient control method for charging and discharging conversion of an automobile battery, a computer device and an automobile. Background Art

[0002] With the development of electric vehicle technology, extended-range electric vehicles are currently an important type of electric vehicle. The charging and discharging process of existing extended-range electric vehicles is as follows: the power battery can be charged through the range extender, and the power battery current provides energy to the drive motor in real time; so the power battery is in an uninterrupted charging and discharging process. This results in the fact that when the power battery is converted between the charging and discharging processes, the internal chemical reaction of the battery is prone to reverse directly and quickly, which in turn reduces the life and working reliability of the power battery. Summary of the invention

[0003] In view of the above defects or improvement needs of the prior art, the present invention proposes a transient control method for automobile battery charge and discharge conversion, a computer device and an automobile, which avoids the direct conversion of the power battery between the charging and discharging process, thereby improving the service life and reliability of the power battery; at the same time, it can smoothly follow the steady-state target charge and discharge power.

[0004] To achieve the above object, according to one aspect of the present invention, a method for controlling the transient state of charging and discharging conversion of an automobile battery is provided, characterized in that:

[0005] Input the charge and discharge data of the last moment, which includes the target charge and discharge power, instantaneous charge and discharge state and zero power holding time;

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

[0007] Determine the current instantaneous real-time theoretical output target charge and discharge power based on the charge and discharge data of the previous instant and the steady-state target charge and discharge power;

[0008] According to the current instantaneous real-time theoretical output target charge and discharge power, determine the current instantaneous charge and discharge conversion mark;

[0009] Set the charge-discharge conversion time threshold, and determine the current instantaneous charge-discharge data based on the current instantaneous real-time theoretical output target charge-discharge power, charge-discharge conversion time threshold, charge-discharge conversion flag, and the previous instantaneous charge-discharge data;

[0010] The power battery executes the target charge and discharge power in the current instantaneous charge and discharge data;

[0011] The charge and discharge data of the current instant are input into the next instant, and the above steps are repeated.

[0012] According to the above technical solution, the process of determining the charge and discharge data of the previous instant is as follows: first, confirm whether the current instant is the initial instant;

[0013] If it is the initial instant, the charge and discharge data of the previous instant adopts the initialization data;

[0014] If it is not the initial instant, the charge and discharge data of the previous instant are iteratively obtained from the charge and discharge data before the previous instant, and the iterative process is as follows:

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

[0016] According to the above technical solution, when the initialization data is assigned, the charge and discharge data of the last moment are as follows:

[0017]

[0018] Among them, SP(K-1) is the instantaneous charge and discharge state at the previous moment, P(K-1) is the instantaneous target charge and discharge power at the previous moment, and Time(K-1) is the zero power holding time at the previous moment.

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

[0020] P1(K)=γ*P(K-1)+(1-γ)*P1

[0021] Wherein, P1(K) is the real-time theoretical output target charge and discharge power, γ is the smoothing coefficient, P1 is the steady-state target charge and discharge power, and P(K-1) is the instantaneous target charge and discharge power. Based on the last instantaneous target charge and discharge power P(K-1) of the power battery and the steady-state target charge and discharge power P1 of the power battery, the real-time theoretical output target charge and discharge power P1(K) of the power battery at the current instant is calculated. The real-time theoretical output target charge and discharge power P1(K) of the power battery at the current instant is equal to the obtained value 1 plus the obtained value 2. Wherein, the obtained value 1 is equal to the instantaneous target charge and discharge power P(K-1) of the power battery at the last instant multiplied by the smoothing coefficient γ, and the obtained value 2 is equal to the obtained value obtained by subtracting the obtained value obtained by the smoothing coefficient from 1 multiplied by the steady-state target charge and discharge power of the power battery.

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

[0023] SP2=SP(K-1)*SP1

[0024] Wherein: SP2 is the current instantaneous charge and discharge conversion mark, SP(K-1) is the instantaneous charge and discharge state of the previous instant, and SP1 is the current instantaneous real-time theoretical charge and discharge state; the power battery charge and discharge conversion mark SP2 is calculated based on the real-time theoretical charge and discharge state SP1 of the power battery and the previous instantaneous charge and discharge state SP(K-1) of the power battery. The power battery charge and discharge conversion mark SP2 is equal to the real-time theoretical charge and discharge state SP1 of the power battery multiplied by the previous instantaneous charge and discharge state SP(K-1) of the power battery.

[0025] For the current instantaneous real-time theoretical charge and discharge state SP1:

[0026]

[0027] Wherein: P1(K) is the real-time theoretical output target charge and discharge power. The real-time theoretical charge and discharge state SP1 of the power battery is obtained based on the real-time theoretical output target charge and discharge power P1(K) of the power battery. If the real-time theoretical output target charge and discharge power of the power battery is greater than zero, the real-time theoretical charge and discharge state of the power battery is 1, which is in the discharge state; if the real-time theoretical output target charge and discharge power of the power battery is equal to zero, the real-time theoretical charge and discharge state of the power battery is 0, which is in the neither charge nor discharge state; if the real-time theoretical output target charge and discharge power of the power battery is less than zero, the real-time theoretical charge and discharge state of the power battery is -1, which is in the charge state.

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

[0029]

[0030] Among them, P(K) is the current instantaneous target charge and discharge power; t1 is the charge and discharge conversion time threshold, the calibration value.

[0031] The current instantaneous target charge and discharge power P(K) of the power battery is calculated based on the current instantaneous charge and discharge conversion mark SP2 of the power battery, the zero power holding time ime(K-1) of the power battery at the previous moment, and the current instantaneous real-time theoretical output target charge and discharge power P1(K) of the power battery.

[0032] If the current instantaneous charge and discharge conversion flag SP2 of the power battery is 1, the charge and discharge state of the power battery does not need to be converted, and the current instantaneous target charge and discharge power P(K) of the power battery is equal to the real-time theoretical output target charge and discharge power P1(K) of the power battery.

[0033] If the current instantaneous charge and discharge conversion flag SP2 of the power battery is 0, the real-time theoretical output target charge and discharge power of the power battery is 0, and the current instantaneous target charge and discharge power P(K) of the power battery is equal to 0.

[0034] If the current instantaneous charge and discharge conversion flag SP2 of the power battery is -1, and the previous instantaneous zero power holding time ime(K-1) of the power battery is less than the charge and discharge conversion time threshold t1, the charge and discharge state of the power battery needs to be converted, but the zero power holding time of the power battery does not meet the requirements, and the current instantaneous target charge and discharge power P(K) of the power battery is equal to 0.

[0035] If the current instantaneous charge and discharge conversion flag SP2 of the power battery is -1, and the previous instantaneous zero power holding time ime(K-1) of the power battery is not less than the charge and discharge conversion time threshold t1, then the charge and discharge state of the power battery needs to be converted, and the power battery zero power holding time has met the requirements, and the current instantaneous target charge and discharge power P(K) of the power battery is equal to the real-time theoretical output target charge and discharge power P1(K) of the power battery.

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

[0037]

[0038] Among them, SP(K-1) is the instantaneous charge and discharge state of the previous moment, and SP(K) is the instantaneous charge and discharge state of the current moment; this process updates the current instantaneous charge and discharge state of the power battery based on the current instantaneous target charge and discharge power of the power battery. If the current instantaneous target charge and discharge power of the power battery is greater than zero, the current instantaneous charge and discharge state of the power battery is 1, and it is in the discharge state; if the current instantaneous target charge and discharge power of the power battery is less than zero, the current instantaneous charge and discharge state of the power battery is -1, and it is in the charging state; if the current instantaneous target charge and discharge power of the power battery is 0, the current instantaneous charge and discharge state of the power battery is not updated.

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

[0040]

[0041] Among them, Time(K-1) is the zero power holding time of the previous instant, Time(K) is the zero power holding time of the current instant, and T is the duration of an instant. The current instant zero power holding time Time(K) of the power battery is updated based on the current instant target charge and discharge power P(K) of the power battery. If the current instant target charge and discharge power P(K) of the power battery is equal to zero, the current instant zero power holding time Time(K) of the power battery is automatically increased by the task execution cycle T; if the current instant target charge and discharge power P(K) of the power battery is not equal to zero, the current instant zero power holding time Time(K) of the power battery is assigned a value of 0.

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

[0043]

[0044] Where: γ is the smoothing coefficient, T is the task execution cycle; P1 is the battery steady-state target charge and discharge power; ΔP onemax ΔP is the power change allowed per unit time of the power battery onemax is the inherent parameter of the power battery; P(K-1) is the instantaneous target charge and discharge power of the previous moment. Based on the steady-state target charge and discharge power P1 of the power battery, the previous instantaneous target charge and discharge power P(K-1) of the power battery, and the allowable power change per unit time ΔP of the power battery onemax , calculate the smoothing coefficient during the task execution period T.

[0045] According to the above technical solution, the process of obtaining the steady-state target charge and discharge power is as follows, which is determined according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power. There are many existing technical solutions for this process;

[0046] According to another aspect of the present invention, 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 any one of the above-mentioned methods for transient control of charging and discharging conversion of an automotive battery when executing the computer program.

[0047] According to another aspect of the present invention, there is provided a car, which is an extended-range electric car and has the computer device described above disposed therein.

[0048] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0049] Based on the charge and discharge data input at the last instant, combined with the acquired steady-state target charge and discharge power, the real-time theoretical output target charge and discharge power of the current instant is output, and the theoretical charge and discharge state of the current instant is determined accordingly. If the theoretical charge and discharge state of the current instant and the actual charge and discharge state of the previous instant are the same, it is determined whether there is a conversion from a charging state to a discharging state, or a conversion from a discharging state to a charging state. If there is, starting from the current instant, the theoretical charge and discharge states of the next multiple consecutive instants must be the same as the theoretical charge and discharge state of the current instant, and the duration of all instants with the same theoretical charge and discharge state is greater than the charge and discharge conversion time threshold. In all instants with the same theoretical charge and discharge state, the target charge and discharge power is 0.

[0050] Based on the above measures, when the power battery is charged and converted to each other, it will maintain the set time at the 0 power point, and the time length is greater than the charge and discharge conversion time threshold; avoiding the power battery from directly converting the charging and discharging process, and then avoiding the direct reverse of the internal chemical reaction of the power battery, which can improve the service life and reliability of the power battery; at the same time, when the current instantaneous target charge and discharge power of the power battery is not converted between charging and discharging, it can smoothly follow the steady-state target charge and discharge power. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is the process provided by the embodiment of the present invention Figure 1 ;

[0052] Figure 2 This is the process provided by the embodiment of the present invention Figure 2 ;

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

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention 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 invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0060] Embodiment 1 (method embodiment)

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

[0062] Step 1: Initialize the charge and discharge data of the previous moment. The process is as follows:

[0063]

[0064] Among them, SP(0) is the initialized instantaneous charge and discharge state, P(0) is the initialized instantaneous target charge and discharge power, and Time(K0) is the initialized zero power holding time.

[0065] Step 2: Obtain the steady-state target charge and discharge power P1. The steady-state target charge and discharge power is obtained as follows. It is determined according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power. There are many existing technical solutions for this process. The steady-state target charge and discharge power can be regarded as a fixed value in two consecutive instants.

[0066] Step 3: Calculate the real-time theoretical output target charge and discharge power at the first instant. The process is as follows:

[0067] P1(1)=γ*P(0)+(1-γ)*P1

[0068] Among them, P1(1) is the real-time theoretical output target charge and discharge power at the first instant, γ is the smoothing coefficient, P1 is the current instantaneous steady-state target charge and discharge power, and P(0) is the initialized instantaneous target charge and discharge power.

[0069] The process of obtaining the smoothing coefficient γ is as follows:

[0070]

[0071] Where: γ is the smoothing coefficient, T is the task execution cycle; P1 is the battery steady-state target charge and discharge power; ΔP onemax ΔP is the power change allowed per unit time of the power battery onemax is the inherent parameter of the power battery; P(0) is the initialized instantaneous target charging and discharging power.

[0072] Step 4: Determine the charge and discharge transition mark of the first instant, the process is as follows:

[0073] SP2=SP(0)*SP1

[0074] Wherein: SP2 is the charge-discharge conversion flag of the first instant, SP(0) is the initialized instantaneous charge-discharge state, and SP1 is the real-time theoretical charge-discharge state of the first instant;

[0075] For the first instantaneous real-time theoretical charge and discharge state SP1:

[0076]

[0077] Where: P1(1) is the real-time theoretical output target charging and discharging power.

[0078] Step 5: Determine the charge and discharge data at the first instant. The process is as follows:

[0079] The process of the first instantaneous target charge and discharge power is as follows:

[0080]

[0081] Among them, P(1) is the target charge and discharge power at the first instant; t1 is the charge and discharge conversion time threshold, the calibration value.

[0082] The process of the instantaneous charge and discharge state at the first instant is as follows:

[0083]

[0084] Wherein, SP(0) is the instantaneous charge and discharge state of initialization, and SP(1) is the instantaneous charge and discharge state of the first instant;

[0085] The process of determining the zero power holding time at the first instant is as follows:

[0086]

[0087] Wherein, Time(0) is the initialization zero power holding time, Time(1) is the first instant zero power holding time, and T is the duration of an instant.

[0088] Step 6: At the first instant, the power battery executes the target charge and discharge power P(1) at the first instant.

[0089] Step 7: Input the charge and discharge data of the first moment obtained by calculation in step 5 into the second moment.

[0090] The control process of the second moment is as follows:

[0091] Step 1: Obtain the first instantaneous charge and discharge data.

[0092] Step 2: Obtain the steady-state target charge and discharge power P1. The steady-state target charge and discharge power is obtained as follows. It is determined according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power. There are many existing technical solutions for this process. The steady-state target charge and discharge power can be regarded as a fixed value in two consecutive instants.

[0093] Step 3: Calculate the real-time theoretical output target charge and discharge power at the second instant. The process is as follows:

[0094] P1(2)=γ*P(1)+(1-γ)*P1

[0095] Among them, P1(2) is the real-time theoretical output target charge and discharge power at the second moment, γ is the smoothing coefficient, P1 is the current steady-state target charge and discharge power, and P(1) is the instantaneous target charge and discharge power at the first moment.

[0096] The process of obtaining the smoothing coefficient γ is as follows:

[0097]

[0098] Where: γ is the smoothing coefficient, T is the task execution cycle; P1 is the battery steady-state target charge and discharge power; ΔP onemax ΔP is the power change allowed per unit time of the power battery onemax is the inherent parameter of the power battery; P(1) is the instantaneous target charging and discharging power at the first instant.

[0099] Step 4: Determine the charge and discharge transition mark of the second instant, the process is as follows:

[0100] SP2=SP(1)*SP1

[0101] Wherein: SP2 is the charge-discharge conversion mark at the second instant, SP(1) is the instantaneous charge-discharge state at the first instant, and SP1 is the real-time theoretical charge-discharge state at the second instant;

[0102] For the second instantaneous real-time theoretical charge and discharge state SP1:

[0103]

[0104] Where: P1(2) is the real-time theoretical output target charging and discharging power.

[0105] Step 5: Determine the charge and discharge data at the second instant. The process is as follows:

[0106] The process of the target charge and discharge power at the second instant is as follows:

[0107]

[0108] Among them, P(2) is the target charge and discharge power at the second instant; t1 is the charge and discharge conversion time threshold, the calibration value.

[0109] The process of the instantaneous charge and discharge state at the second instant is as follows:

[0110]

[0111] Wherein, SP(1) is the instantaneous charge-discharge state at the first instant, and SP(2) is the instantaneous charge-discharge state at the second instant;

[0112] The process of determining the zero power holding time at the second instant is as follows:

[0113]

[0114] Wherein, Time(1) is the zero power holding time of the first instant, Time(2) is the zero power holding time of the second instant, and T is the duration of one instant.

[0115] Step 6: At the second instant, the power battery executes the target charge and discharge power P(2) at the second instant.

[0116] Step 7: Input the charge and discharge data of the second moment obtained by calculation in step 5 into the third moment.

[0117] The control process at the Kth instant is as follows:

[0118] Step 1: Obtain the charge and discharge data at the K-1th instant.

[0119] Step 2: Obtain the steady-state target charge and discharge power P1. The steady-state target charge and discharge power is obtained as follows. It is determined according to the temperature of the power battery, the SOC value of the power battery, and the required charge and discharge power. There are many existing technical solutions for this process. The steady-state target charge and discharge power can be regarded as a fixed value in two consecutive instants.

[0120] Step 3: Calculate the real-time theoretical output target charge and discharge power at the Kth instant. The process is as follows:

[0121] P1(K)=γ*P(1)+(1-γ)*P1

[0122] Among them, P1(K) is the real-time theoretical output target charge and discharge power at the Kth moment, γ is the smoothing coefficient, P1 is the current steady-state target charge and discharge power, and P(K-1) is the instantaneous target charge and discharge power at the K-1th moment.

[0123] The process of obtaining the smoothing coefficient γ is as follows:

[0124]

[0125] Where: γ is the smoothing coefficient, T is the task execution cycle; P1 is the battery steady-state target charge and discharge power; ΔP onemax ΔP is the power change allowed per unit time of the power battery onemax is the inherent parameter of the power battery; P(2) is the instantaneous target charging and discharging power at the second instant.

[0126] Step 4: Determine the charge and discharge transition mark at the Kth instant, the process is as follows:

[0127] SP2=SP(K)*SP1

[0128] Wherein: SP2 is the charge-discharge conversion mark at the Kth instant, SP(K-1) is the instantaneous charge-discharge state at the K-1th instant, and SP1 is the real-time theoretical charge-discharge state at the Kth instant;

[0129] For the real-time theoretical charge and discharge state SP1 at the Kth instant:

[0130]

[0131] Where: P1(K) is the real-time theoretical output target charge and discharge power at the Kth instant.

[0132] Step 5: Determine the charge and discharge data at the Kth instant. The process is as follows:

[0133] The process of the target charge and discharge power at the Kth instant is as follows:

[0134]

[0135] Among them, P(K) is the target charge and discharge power at the Kth instant; t1 is the charge and discharge conversion time threshold, the calibration value.

[0136] The process of instantaneous charge and discharge state at the Kth instant is as follows:

[0137]

[0138] Wherein, SP(K-1) is the instantaneous charge-discharge state at the K-1th instant, and SP(K) is the instantaneous charge-discharge state at the Kth instant;

[0139] The process of determining the zero power holding time at the Kth instant is as follows:

[0140]

[0141] Wherein, Time(K-1) is the zero power holding time at the K-1th instant, Time(K) is the zero power holding time at the Kth instant, and T is the duration of one instant.

[0142] Step 6: At the Kth moment, the power battery executes the target charge and discharge power P(2) at the Kth moment.

[0143] Step 7: Input the charge and discharge data at the Kth instant obtained by calculation in the fifth step into the K+1th instant.

[0144] Embodiment 2

[0145] like Figure 2 The figure is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention, such as a smart phone, tablet computer, laptop computer, desktop computer, rack server, blade server, tower server or cabinet server (including an independent server, or a server cluster composed of multiple servers) that can execute programs. The computer device 20 of this embodiment includes at least but is not limited to: a memory 21 and a processor 22 that can communicate with each other via a system bus, such as Figure 2 It should be pointed out that Figure 2 Only computer device 20 is shown with components 21 - 22 , but it should be understood that implementing all of the components shown is not a requirement, and more or fewer components may alternatively be implemented.

[0146] In this embodiment, the memory 21 (i.e., readable storage medium) includes flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM). The memory 21 can also be an external storage device of the computer device 20, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the computer device 20. Of course, the memory 21 can also include both the internal storage unit of the computer device 20 and its external storage device. In this embodiment, the memory 21 is generally used to store the operating system and various application software installed in the computer device 20, such as the program code of the transient control method for charging and discharging conversion of a car battery in the method embodiment. In addition, the memory 21 can also be used to temporarily store various data that have been output or are to be output.

[0147] The processor 22 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip in some embodiments. The processor 22 is generally used to control the overall operation of the computer device 20. In this embodiment, the processor 22 is used to run the program code stored in the memory 21 or process data, such as running the program code of the automotive battery charge and discharge conversion transient control method to implement the automotive battery charge and discharge conversion transient control method in the method embodiment.

[0148] Embodiment 3

[0149] The present application also provides a computer-readable storage medium, such as 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), a magnetic memory, a disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, and the program realizes corresponding functions when executed by a processor. The computer-readable storage medium of this embodiment is a program code of a method for transient control of charge and discharge conversion of an automobile battery, and when executed by a processor, the method for transient control of charge and discharge conversion of an automobile battery of the method embodiment is realized.

[0150] Embodiment 4

[0151] A car is provided, which is an extended-range electric car and is provided with the computer device.

[0152] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0153] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling transient state of charging and discharging conversion of automobile batteries, characterized in that: Input the charge and discharge data of the last moment, which includes the target charge and discharge power, instantaneous charge and discharge state and zero power holding time; Obtain steady-state target charging and discharging power; Determine the current instantaneous real-time theoretical output target charge and discharge power based on the charge and discharge data of the previous instant and the steady-state target charge and discharge power; According to the current instantaneous real-time theoretical output target charge and discharge power, determine the current instantaneous charge and discharge conversion mark; Set the charge-discharge conversion time threshold, and determine the current instantaneous charge-discharge data based on the current instantaneous real-time theoretical output target charge-discharge power, charge-discharge conversion time threshold, charge-discharge conversion flag, and the previous instantaneous charge-discharge data; The power battery executes the target charge and discharge power in the current instantaneous charge and discharge data; The charge and discharge data of the current instant are input into the next instant, and the above steps are repeated.

2. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 1, characterized in that: The process of determining the charge and discharge data of the previous instant is as follows: first, confirm whether the current instant is the initial instant; If it is the initial instant, the charge and discharge data of the previous instant adopts the initialization data; If it is not the initial instant, the charge and discharge data of the previous instant are iteratively obtained from the charge and discharge data before the previous instant, and the iterative process is as follows: In two adjacent moments, the target charge and discharge power at the latter moment is determined by the charge and discharge data at the former moment, and the instantaneous charge and discharge state at the latter moment and the zero power holding time of the power battery are determined by the target charge and discharge power at the latter moment; thereby determining the charge and discharge data of the previous moment.

3. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 2, characterized in that: When the initialization data is assigned, the charge and discharge data of the last moment are as follows: Wherein, SP(0) is the initialized instantaneous charge and discharge state, P(0) is the initialized instantaneous target charge and discharge power, and Time(0) is the initialized zero power holding time.

4. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 2, characterized in that: The process of determining the current instantaneous real-time theoretical output target charge and discharge power is as follows: P1(K)=γ*P(K-1)+(1-γ)*P1 Among them, P1(K) is the real-time theoretical output target charge and discharge power at the current moment, γ is the smoothing coefficient, P1 is the steady-state target charge and discharge power, and P(K-1) is the instantaneous target charge and discharge power at the previous moment.

5. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 4, characterized in that: The process of determining the current instantaneous charge-discharge conversion flag is as follows: SP2=SP(K-1)*SP1 Wherein: SP2 is the current instantaneous charge and discharge conversion mark, SP(K-1) is the instantaneous charge and discharge state of the previous instant, and SP1 is the current instantaneous real-time theoretical charge and discharge state; For the current instantaneous real-time theoretical charge and discharge state SP1: Where: P1(K) is the current instantaneous real-time theoretical output target charging and discharging power.

6. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 5, characterized in that: The process of determining the current instantaneous target charge and discharge power is as follows: Among them, P(K) is the current instantaneous target charge and discharge power; t1 is the charge and discharge conversion time threshold, the calibration value.

7. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 6, characterized in that: The process of determining the current instantaneous charge and discharge state is as follows: Among them, SP(K-1) is the instantaneous charge and discharge state at the previous moment, and SP(K) is the instantaneous charge and discharge state at the current moment; The process of determining the current instantaneous zero power holding time is as follows: Wherein, Time(K-1) is the zero power holding time of the previous instant, Time(K) is the zero power holding time of the current instant, and T is the duration of an instant.

8. The method for controlling the transient state of charging and discharging conversion of a vehicle battery according to claim 4, characterized in that: The process of obtaining the smoothing coefficient γ is as follows: Where: γ is the smoothing coefficient, T is the task execution cycle; P1 is the battery steady-state target charge and discharge power; ΔP onemax ΔP is the power change allowed per unit time of the power battery onemax is the inherent parameter of the power battery; P(K-1) is the instantaneous target charging and discharging power at the previous moment.

9. A computer device, 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 method for transient control of charging and discharging conversion of an automotive battery as claimed in any one of claims 1 to 8 when executing the computer program.

10. An automobile, characterized in that: The car is an extended-range electric car, and the computer device according to claim 9 is provided in the car.

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