A hybrid vehicle energy storage unit operation energy balance control method and component

Abstract

The present application discloses a hybrid vehicle energy storage unit operation energy balance control method and component, compared with the current technology, the control strategy for each operation is different due to the different SOC values ​​before and after the vehicle is running. With this technical solution, according to the load power demand of the vehicle and the SOC value of the energy storage unit, power is allocated to the power generation unit and the energy storage unit according to the pre-allocation principle, and the corresponding relationship between the terminal SOC and the initial SOC value after the vehicle is operated after allocation according to this principle is calculated. According to the corresponding relationship, it is confirmed whether SOC balance control is required. If necessary, the output power of the power generation unit and the energy storage unit is adjusted according to the corresponding relationship to make the terminal SOC value equal to the initial SOC value. This solution controls the SOC of the energy storage unit before and after the vehicle is operated to be equal, so that the vehicle driving operation and the transient energy control strategy are the same, which reduces the difficulty of the driver's operation and facilitates the realization of optimal energy control to improve energy utilization efficiency.

Description

Technical Field

[0001] The present application relates to the field of vehicle power technology, and in particular to a method and component for controlling the operating energy balance of a hybrid vehicle energy storage unit. Background Art

[0002] The power source system of a hybrid locomotive is generally composed of a power generation unit (such as a diesel generator) and an energy storage unit (such as a traction battery). The traction kinetic energy is provided by the hybrid system during traction, and the energy storage unit absorbs the braking energy of the locomotive during braking. Compared with traditional diesel locomotives, it can greatly reduce carbon emissions and improve energy utilization efficiency, which is an important part of achieving the global carbon peak and carbon neutrality development goals.

[0003] For hybrid locomotives currently operating on actual lines, the SOC values ​​of the energy storage units before and after operation are different, resulting in different driving operations and transient energy control strategies for each operation on the same line. This not only increases the operating difficulty for the driver, but also makes the energy utilization efficiency different each time, thus failing to achieve optimal energy control. At the same time, because it is not repeatable, it is not conducive to the realization of unmanned driving of hybrid locomotives.

[0004] It can be seen that how to keep the SOC value of the energy storage unit the same before and after the vehicle is running is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present application is to provide a hybrid vehicle energy storage unit operation energy balance control method and component for maintaining the SOC value of the energy storage unit before and after the vehicle is running the same.

[0006] In order to solve the above technical problems, the present application provides a hybrid vehicle energy storage unit operation energy balance control method, comprising:

[0007] Calculate the load power requirements of vehicles operating on the line;

[0008] Pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit;

[0009] Calculating a corresponding relationship between a termination SOC value of the energy storage unit and the initial SOC value after the vehicle runs according to the pre-allocated power;

[0010] Determining whether balance adjustment control is required according to the corresponding relationship;

[0011] If balance adjustment control is required, the output power of the power generation unit and the energy storage unit is adjusted according to the corresponding relationship so that the termination SOC value is equal to the initial SOC value.

[0012] Preferably, the confirming whether balance adjustment control is required according to the corresponding relationship includes:

[0013] If the final SOC value of the energy storage unit is the same as the initial SOC value, confirming that no balancing adjustment control is performed;

[0014] If the termination SOC value is greater than the initial SOC value, confirming to perform discharge reverse control;

[0015] If the termination SOC value is less than the initial SOC value, it is confirmed to perform the advance charging control.

[0016] Preferably, the discharge reverse control includes:

[0017] Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value;

[0018] The principle of updating by decreasing the unit step size is:

[0019] When P bat-max ≤P f (i) When P bat (i) = P bat-max , P D (i) = P f (i)-P bat-max ;

[0020] When 0≤P f (i)<P bat-max When P bat (i) = P f (i), P D (i) = 0;

[0021] When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0;

[0022] When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0;

[0023] Among them, P f (i) is the load transient power demand, P bat-maxis the maximum power that the energy storage unit can sustainably release, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

[0024] Preferably, the advance charging control includes:

[0025] Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value;

[0026] The principle of updating by decreasing the unit step size is:

[0027] When (P d-max +P bat-min )≤P f (i) When P bat (i) = P f (i)-P d-max , P D (i) = P d-max ;

[0028] When 0≤P f (i)<(P d-max +P bat-min ), P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ;

[0029] When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0;

[0030] When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0;

[0031] Among them, P f (i) is the load transient power demand, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, P d-max is the maximum power generated by the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

[0032] Preferably, the pre-allocation of the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit comprises:

[0033] When P d-l ≤P f (i)≤P d-h When P D (i) = P f (i), P bat (i) = 0;

[0034] When P f (i)>P d-h And SOC(i)>SOC min When P D (i) = P d-h , P bat (i) = P f (i)-P d-h ;

[0035] When P f (i)>P d-h And SOC(i)≤SOC min When P D (i) = P d-max , P bat (i) = P f (i)-P d-max ;

[0036] When P bat-max ≤P f (i)<P d-l And {SOC(i-1)<SOC min ||(SOC(i-1)>SOC(i-2)&&SOC(i-1)≤0.7)}, P bat (i) = P bat-min , P D (i) = Pf (i)-P bat-min ;

[0037] When P bat-max ≤P f (i)<P d-l And {SOC(i-1)>0.7||(SOC(i-1)<SOC(i-2)&&SOC(i-1)≥SOC min )}, P bat (i) = 0, P D (i) = P f (i);

[0038] When 0≤P f (i)<P bat-max And {SOC(i-1)>SOC max ||(SOC(i-1)<SOC(i-2)&&SOC(i-1)≥SOC min )}, P bat (i) = P f (i), P D (i) = 0;

[0039] When 0≤P f (i)<P bat-max And {SOC(i-1)<SOC min ||(SOC(i-1)>SOC(i-2)&&SOC(i-1)≤SOC max )}, P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ;

[0040] When P f (i)<P bat-min And SOC(i)≤SOC max When P bat (i) = P bat-min , P D (i) = 0;

[0041] When P f (i)<0 and SOC(i)>SOC max When P bat (i) = 0, P D (i) = 0;

[0042] Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-minis the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P d-l is the power at the lower boundary of the high efficiency area of ​​the power generation unit, P d-h is the power at the high boundary of the power generation unit’s high efficiency zone, P d-max is the maximum power generated by the power generation unit, P D (i) is the instantaneous output power of the power generation unit, SOC min is the minimum SOC value allowed by the energy storage unit, SOC max is the maximum SOC value allowed by the energy storage unit, and SOC(i) is the instantaneous remaining power percentage of the energy storage unit.

[0043] Preferably, the calculation of the load power demand of the vehicle running on the line is: calculating the load power of the vehicle according to the line conditions, load and operation time.

[0044] Preferably, it also includes:

[0045] When the degree of deviation between the final SOC value and the initial SOC value exceeds a threshold, a prompt signal is sent.

[0046] In order to solve the above technical problems, the present application also provides a hybrid vehicle energy storage unit operation energy balance control device, comprising:

[0047] The first calculation module is used to calculate the load power demand of the vehicle running on the line;

[0048] A pre-allocation module, used for pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit;

[0049] A second calculation module, used for calculating the corresponding relationship between the termination SOC value of the energy storage unit and the initial SOC value after the vehicle runs according to the pre-allocated power;

[0050] A confirmation module, used for confirming whether to perform balance adjustment control according to the corresponding relationship;

[0051] The adjustment module is used to adjust the output power of the power generation unit and the energy storage unit according to the corresponding relationship if balance adjustment control is required, so that the termination SOC value is equal to the initial SOC value.

[0052] In order to solve the above technical problems, the present application also provides another hybrid vehicle energy storage unit operation energy balance control device, including a memory for storing a computer program;

[0053] A processor is used to implement the steps of the above-mentioned hybrid vehicle energy storage unit operation energy balance control method when executing the computer program.

[0054] In order to solve the above technical problems, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the hybrid vehicle energy storage unit operation energy balance control method as described above are implemented.

[0055] The energy balance control method for the operation of the energy storage unit of a hybrid vehicle provided in the present application calculates the load power demand of the vehicle running on the line; pre-allocates the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; calculates the correspondence between the terminal SOC value and the initial SOC value of the energy storage unit after the vehicle runs according to the pre-allocated power; confirms whether balance adjustment control is required according to the correspondence; if balance adjustment control is required, adjusts the output power of the power generation unit and the energy storage unit according to the correspondence so that the terminal SOC value is equal to the initial SOC value. Compared with the current technology, there is no control of the SOC value before and after the vehicle runs, resulting in different driving operations and transient energy control strategies for each operation on the same line, which not only increases the difficulty of the driver's operation, but also makes the energy utilization efficiency different each time, thereby failing to achieve optimal energy control. This technical solution is adopted to allocate power to the power generation unit and the energy storage unit according to the pre-allocation principle based on the load power demand of the vehicle running on the line and the SOC value of the energy storage unit, and calculate the correspondence between the terminal SOC and the initial SOC value after the vehicle is running after the allocation according to this principle. It is confirmed whether SOC balance control is required based on the correspondence. If necessary, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. This technical solution can control the SOC of the energy storage unit before and after the vehicle is running to be equal, so that the driving operation and transient energy control strategy of the vehicle are the same each time it operates on the same line, which greatly reduces the operating difficulty of the driver, and also facilitates the realization of optimal energy control to improve energy utilization efficiency. At the same time, because of its repeatability, it is also conducive to the realization of efficient and reliable unmanned driving of hybrid locomotives.

[0056] In addition, the hybrid vehicle energy storage unit operating energy balance control device and medium provided in the present application correspond to the above-mentioned hybrid vehicle energy storage unit operating energy balance control method, and the effects are the same as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 A flow chart of a hybrid vehicle energy storage unit operation energy balance control method provided in an embodiment of the present application;

[0059] Figure 2 A structural diagram of a hybrid vehicle energy storage unit operation energy balance control device provided in an embodiment of the present application;

[0060] Figure 3 A structural diagram of another hybrid vehicle energy storage unit operating energy balance control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] A hybrid vehicle is a vehicle whose vehicle drive system is composed of two or more single drive systems that can operate simultaneously, and the vehicle's driving power is provided by the single drive systems individually or jointly according to the actual vehicle driving state.

[0063] The power source system of a hybrid locomotive is generally composed of a power generation unit (such as a diesel generator) and an energy storage unit (such as a traction battery). The traction kinetic energy is provided by the hybrid system during traction, and the energy storage unit absorbs the braking energy of the locomotive during braking. Compared with traditional diesel locomotives, it can greatly reduce carbon emissions and improve energy utilization efficiency, which is an important part of achieving the global carbon peak and carbon neutrality development goals.

[0064] At present, the hybrid locomotives in actual line operation all control the SOC fluctuation of the energy storage unit (such as battery) within a certain range (such as 20%-90%) based on the power threshold. The SOC value of the energy storage unit at the start and end points of the hybrid locomotive operation is not controlled to be the same, resulting in different driving operations and transient energy control strategies for each operation on the same line, which not only increases the operating difficulty of the driver, but also makes the energy utilization efficiency different each time, thereby failing to achieve optimal energy control. At the same time, because it is not repeatable, it is not conducive to the realization of unmanned driving of hybrid locomotives.

[0065] The core of this application is to provide a hybrid vehicle energy storage unit operation energy balance control method and components for maintaining the SOC value of the energy storage unit before and after the vehicle is running the same.

[0066] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0067] Figure 1 A flowchart of a hybrid vehicle energy storage unit operation energy balance control method provided in an embodiment of the present application, such as Figure 1 As shown, the method includes:

[0068] S10: Calculate the load power demand of the vehicle running on the line;

[0069] S11: pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit;

[0070] S12: Calculating the corresponding relationship between the final SOC value and the initial SOC value of the energy storage unit after the vehicle runs according to the pre-allocated power;

[0071] S13: confirming whether balance adjustment control is required according to the corresponding relationship;

[0072] S14: If balance adjustment control is required, the output power of the power generation unit and the energy storage unit is adjusted according to the corresponding relationship so that the final SOC value is equal to the initial SOC value.

[0073] A hybrid vehicle is a vehicle whose vehicle drive system is composed of two or more single drive systems that can operate simultaneously, and the vehicle's driving power is provided by the single drive systems individually or jointly according to the actual vehicle driving state.

[0074] The power source system of a hybrid locomotive is generally composed of a power generation unit (such as a diesel generator) and an energy storage unit (such as a traction battery). The traction kinetic energy is provided by the hybrid system during traction, and the energy storage unit absorbs the braking energy of the locomotive during braking. Compared with traditional diesel locomotives, it can greatly reduce carbon emissions and improve energy utilization efficiency, which is an important part of achieving the global carbon peak and carbon neutrality development goals.

[0075] In a specific implementation, the load power of a vehicle is affected by many factors, such as the number of loads, the route the vehicle is traveling, etc. Therefore, preferably, the load power requirement of a vehicle running on a route is calculated as follows: the load power of the vehicle is calculated according to route conditions, load, and operating time.

[0076] The energy balance control method for the operation of the energy storage unit of a hybrid vehicle provided in the present application calculates the load power demand of the vehicle running on the line; pre-allocates the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; calculates the correspondence between the terminal SOC value and the initial SOC value of the energy storage unit after the vehicle runs according to the pre-allocated power; confirms whether balance adjustment control is required according to the correspondence; if balance adjustment control is required, adjusts the output power of the power generation unit and the energy storage unit according to the correspondence so that the terminal SOC value is equal to the initial SOC value. Compared with the current technology, there is no control of the SOC value before and after the vehicle runs, resulting in different driving operations and transient energy control strategies for each operation on the same line, which not only increases the difficulty of the driver's operation, but also makes the energy utilization efficiency different each time, thereby failing to achieve optimal energy control. This technical solution is adopted to allocate power to the power generation unit and the energy storage unit according to the pre-allocation principle based on the load power demand of the vehicle running on the line and the SOC value of the energy storage unit, and calculate the correspondence between the terminal SOC and the initial SOC value after the vehicle is running after the allocation according to this principle. It is confirmed whether SOC balance control is required based on the correspondence. If necessary, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. This technical solution can control the SOC of the energy storage unit before and after the vehicle is running to be equal, so that the driving operation and transient energy control strategy of the vehicle are the same each time it operates on the same line, which greatly reduces the operating difficulty of the driver, and also facilitates the realization of optimal energy control to improve energy utilization efficiency. At the same time, because of its repeatability, it is also conducive to the realization of efficient and reliable unmanned driving of hybrid locomotives.

[0077] On the basis of the above embodiment, in this embodiment, determining whether balance adjustment control is required according to the corresponding relationship includes:

[0078] If the final SOC value of the energy storage unit is the same as the initial SOC value, it is confirmed that no balancing adjustment control is performed;

[0079] If the final SOC value is greater than the initial SOC value, the discharge reverse control is confirmed;

[0080] If the final SOC value is less than the initial SOC value, it is confirmed to perform the advance charging control.

[0081] It is understandable that, in a specific implementation, if the termination SOC value of the energy storage unit before and after the vehicle is running is the same as the initial SOC value, it means that the energy storage unit is not used during the vehicle operation, or the amount of electricity consumed and replenished by the energy storage unit is the same, and no control is required at this time. If the termination SOC value is greater than the initial SOC value, it means that the energy storage unit is charged, and the adjustment strategy at this time should be to discharge the energy storage unit. If the termination SOC value is less than the initial SOC value, it means that the energy storage unit is over-discharged, and charging control is required at this time.

[0082] Specifically, the discharge back-pushing control includes:

[0083] Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value;

[0084] The principle of updating by decreasing the unit step size is:

[0085] When P bat-max ≤P f (i) When P bat (i) = P bat-max , P D (i) = P f (i)-P bat-max ;

[0086] When 0≤P f (i)<P bat-max When P bat (i) = P f (i), P D (i) = 0;

[0087] When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0;

[0088] When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0;

[0089] Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-minis the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

[0090] Advance charge control includes:

[0091] Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value;

[0092] The principle of updating by decreasing the unit step size is:

[0093] When (P d-max +P bat-min )≤P f (i) When P bat (i) = P f (i)-P d-max , P D (i) = P d-max ;

[0094] When 0≤P f (i)<(P d-max +P bat-min ), P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ;

[0095] When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0;

[0096] When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0;

[0097] Among them, P f (i) is the load transient power demand, Pbat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, P d-max is the maximum power generated by the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

[0098] In a specific implementation, pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit includes:

[0099] When P d-l ≤P f (i)≤P d-h When P D (i) = P f (i), P bat (i) = 0;

[0100] When P f (i)>P d-h And SOC(i)>SOC min When P D (i) = P d-h , P bat (i) = P f (i)-P d-h ;

[0101] When P f (i)>P d-h And SOC(i)≤SOC min When P D (i) = P d-max , P bat (i) = P f (i)-P d-max ;

[0102] When P bat-max ≤P f (i)<P d-l And {SOC(i-1)<SOC min ||(SOC(i-1)>SOC(i-2)&&SOC(i-1)≤0.7)}, P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ;

[0103] When P bat-max ≤P f (i)<P d-l And {SOC(i-1)>0.7||(SOC(i-1)<SOC(i-2)&&SOC(i-1)≥SOC min )}, P bat (i) = 0, P D (i) = P f (i);

[0104] When 0≤P f (i)<P bat-max And {SOC(i-1)>SOC max ||(SOC(i-1)<SOC(i-2)&&SOC(i-1)≥SOC min )}, P bat (i) = P f (i), P D (i) = 0;

[0105] When 0≤P f (i)<P bat-max And {SOC(i-1)<SOC min ||(SOC(i-1)>SOC(i-2)&&SOC(i-1)≤SOC max )}, P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ;

[0106] When P f (i)<P bat-min And SOC(i)≤SOC max When P bat (i) = P bat-min , P D (i) = 0;

[0107] When P f (i)<0 and SOC(i)>SOC max When P bat (i) = 0, P D (i) = 0;

[0108] Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, Pd-l is the power at the lower boundary of the high efficiency area of ​​the power generation unit, P d-h is the power at the high boundary of the power generation unit’s high efficiency zone, P d-max is the maximum power generated by the power generation unit, P D (i) is the instantaneous output power of the power generation unit, SOC min is the minimum SOC value allowed by the energy storage unit, SOC max is the maximum SOC value allowed by the energy storage unit, and SOC(i) is the instantaneous remaining power percentage of the energy storage unit.

[0109] It is understandable that the purpose of this embodiment is to ensure that the SOC value of the energy storage unit remains consistent before and after the vehicle is operated, so that the driving operation and transient energy control strategy of the vehicle are the same each time it is operated on the same line, which greatly reduces the operating difficulty of the driver, and is also convenient for achieving optimal energy control to improve energy utilization efficiency. At the same time, because of its repeatability, it is also conducive to the hybrid locomotive to achieve efficient and reliable unmanned driving. In the specific implementation, if the deviation between the termination SOC value and the initial SOC value is too large and exceeds the threshold, a prompt signal should be sent at this time. So that the technicians can find out why the deviation between the termination SOC value and the initial SOC value is too large.

[0110] The hybrid vehicle energy storage unit operation energy balance control method provided in this embodiment is used to ensure the SOC value of the energy storage unit is stable before and after the vehicle is running. For different states of each vehicle operation, such as vehicle load or running time, online real-time control adjustment can be performed through the method provided in this embodiment to ensure the stability of the SOC value. Similarly, if the pre-operation conditions and working conditions change due to vehicle failure or other reasons, real-time online iterative adjustment can also be performed according to the method of this application.

[0111] In the above embodiments, the hybrid vehicle energy storage unit operation energy balance control method is described in detail, and the present application also provides a corresponding embodiment of the hybrid vehicle energy storage unit operation energy balance control device. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the functional module perspective, and the other is based on the hardware perspective.

[0112] Figure 2 A structural diagram of a hybrid vehicle energy storage unit operation energy balance control device provided in an embodiment of the present application, such as Figure 2 As shown, the device comprises:

[0113] The first calculation module 10 is used to calculate the load power demand of the vehicle running on the line;

[0114] A pre-allocation module 11 is used to pre-allocate the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit;

[0115] A second calculation module 12 is used to calculate the corresponding relationship between the final SOC value and the initial SOC value of the energy storage unit after the vehicle runs according to the pre-allocated power;

[0116] A confirmation module 13, used to confirm whether to perform balance adjustment control according to the corresponding relationship;

[0117] The balance adjustment module 14 is used to adjust the output power of the power generation unit and the energy storage unit according to the corresponding relationship if balance adjustment control is required, so that the final SOC value is equal to the initial SOC value.

[0118] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0119] The energy balance control device for the operation of the energy storage unit of a hybrid vehicle provided by the present application calculates the load power demand of the vehicle when it is running on the line; pre-allocates the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; calculates the correspondence between the terminal SOC value and the initial SOC value of the energy storage unit after the vehicle is running according to the pre-allocated power; confirms whether a balance adjustment control is required according to the correspondence; if a balance adjustment control is required, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. Compared with the current technology, there is no control over the SOC value before and after the vehicle is running, resulting in different driving operations and transient energy control strategies for each operation on the same line, which not only increases the difficulty of the driver's operation, but also makes the energy utilization efficiency different each time, thereby failing to achieve optimal energy control. This technical solution is adopted to allocate power to the power generation unit and the energy storage unit according to the pre-allocation principle based on the load power demand of the vehicle running on the line and the SOC value of the energy storage unit, and calculate the correspondence between the terminal SOC and the initial SOC value after the vehicle is running after the allocation according to this principle. It is confirmed whether SOC balance control is required based on the correspondence. If necessary, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. This technical solution can control the SOC of the energy storage unit before and after the vehicle is running to be equal, so that the driving operation and transient energy control strategy of the vehicle are the same each time it operates on the same line, which greatly reduces the operating difficulty of the driver, and also facilitates the realization of optimal energy control to improve energy utilization efficiency. At the same time, because of its repeatability, it is also conducive to the realization of efficient and reliable unmanned driving of hybrid locomotives.

[0120] Figure 3A structural diagram of another hybrid vehicle energy storage unit operation energy balance control device provided in an embodiment of the present application, such as Figure 3 As shown, the device comprises: a memory 20 for storing a computer program;

[0121] The processor 21 is used to implement the steps of the hybrid vehicle energy storage unit operation energy balance control method as described in the above embodiment when executing the computer program.

[0122] The hybrid vehicle energy storage unit operating energy balance control device provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer or a desktop computer.

[0123] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0124] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, it can implement the relevant steps of the hybrid vehicle energy storage unit operation energy balance control method disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be short-term storage or permanent storage. Among them, the operating system 202 may include Windows, Unix, Linux, etc. Data 203 may include but is not limited to an initial SOC value, a termination SOC value, etc.

[0125] In some embodiments, the hybrid vehicle energy storage unit operating energy balance control device may further include a display screen 22 , an input / output interface 23 , a communication interface 24 , a power supply 25 , and a communication bus 26 .

[0126] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the energy balance control device for operating the energy storage unit of a hybrid vehicle, and may include more or fewer components than those shown in the figure.

[0127] The hybrid vehicle energy storage unit operation energy balance control device provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: calculate the load power demand of the vehicle running on the line; pre-allocate the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; calculate the correspondence between the terminal SOC value and the initial SOC value of the energy storage unit after the vehicle runs according to the pre-allocated power; confirm whether balance adjustment control is required according to the corresponding relationship; if balance adjustment control is required, adjust the output power of the power generation unit and the energy storage unit according to the corresponding relationship so that the terminal SOC value is equal to the initial SOC value.

[0128] The energy balance control device for the operation of the energy storage unit of a hybrid vehicle provided by the present application calculates the load power demand of the vehicle when it is running on the line; pre-allocates the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; calculates the correspondence between the terminal SOC value and the initial SOC value of the energy storage unit after the vehicle is running according to the pre-allocated power; confirms whether a balance adjustment control is required according to the correspondence; if a balance adjustment control is required, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. Compared with the current technology, there is no control over the SOC value before and after the vehicle is running, resulting in different driving operations and transient energy control strategies for each operation on the same line, which not only increases the difficulty of the driver's operation, but also makes the energy utilization efficiency different each time, thereby failing to achieve optimal energy control. This technical solution is adopted to allocate power to the power generation unit and the energy storage unit according to the pre-allocation principle based on the load power demand of the vehicle running on the line and the SOC value of the energy storage unit, and calculate the correspondence between the terminal SOC and the initial SOC value after the vehicle is running after the allocation according to this principle. It is confirmed whether SOC balance control is required based on the correspondence. If necessary, the output power of the power generation unit and the energy storage unit is adjusted according to the correspondence so that the terminal SOC value is equal to the initial SOC value. This technical solution can control the SOC of the energy storage unit before and after the vehicle is running to be equal, so that the driving operation and transient energy control strategy of the vehicle are the same each time it operates on the same line, which greatly reduces the operating difficulty of the driver, and also facilitates the realization of optimal energy control to improve energy utilization efficiency. At the same time, because of its repeatability, it is also conducive to the realization of efficient and reliable unmanned driving of hybrid locomotives.

[0129] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps recorded in the above method embodiment are implemented.

[0130] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0131] The above is a detailed introduction to the hybrid vehicle energy storage unit operation energy balance control method and components provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0132] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A hybrid vehicle energy storage unit operation energy balance control method, characterized in that: include: Calculate the load power requirements of vehicles operating on the line; Pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; Calculating a corresponding relationship between a termination SOC value of the energy storage unit and the initial SOC value after the vehicle runs according to the pre-allocated power; Determining whether balance adjustment control is required according to the corresponding relationship; If balance adjustment control is required, the output power of the power generation unit and the energy storage unit is adjusted according to the corresponding relationship so that the final SOC value is equal to the initial SOC value; The determining whether balance adjustment control is required according to the corresponding relationship includes: If the final SOC value of the energy storage unit is the same as the initial SOC value, confirming that no balancing adjustment control is performed; If the termination SOC value is greater than the initial SOC value, confirming to perform discharge reverse control; If the termination SOC value is less than the initial SOC value, confirming to perform advance charging control; The discharge back-pushing control comprises: Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value; The principle of updating by decreasing the unit step size is: When P bat-max ≤P f (i) When P bat (i) = P bat-max , P D (i) = P f (i)-P bat-max ; When 0≤P f (i)<P bat-max When P bat (i) = P f (i), P D (i) = 0; When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0; When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0; Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

2. The hybrid vehicle energy storage unit operation energy balance control method according to claim 1, characterized in that: The advance charging control includes: Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value; The principle of updating by decreasing the unit step size is: When (P d-max +P bat-min )≤P f (i) When P bat (i) = P f (i)-P d-max , P D (i) = P d-max ; When 0≤P f (i)<(P d-max +P bat-min ), P bat (i) = P bat-min , P D (i) = P f (i)-P bat-min ; When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0; When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0; Among them, P f (i) is the load transient power demand, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, P d-max is the maximum power generated by the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

3. The hybrid vehicle energy storage unit operation energy balance control method according to claim 1, characterized in that: The pre-allocation of the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit comprises: When P d-l ≤P f (i)≤P d-h When P D (i) = P f (i), P bat (i) = 0; When P f (i)>P d-h And SOC(i)>SOC min When P D (i) = P d-h , P bat (i) = P f (i)-P d-h ; When P bat-max ≤P f (i)<P d-l and {SOC(i - 1) < SOC min ||(SOC(i - 1) > SOC(i - 2) && SOC(i - 1) ≤ 0.7)}, then P bat (i) = P bat-min , P D (i) = P f (i) - P bat-min ; When P bat-max ≤P f (i) < P d-l and {SOC(i - 1) > 0.7 || (SOC(i - 1) < SOC(i - 2) && SOC(i - 1) ≥ SOC min )}, then P bat (i) = 0, P D (i) = P f (i); When 0 ≤ P f (i) < P bat-max and {SOC(i - 1) > SOC max || (SOC(i - 1) < SOC(i - 2) && SOC(i - 1) ≥ SOC min )}, then P bat (i) = P f (i), P D (i) = 0; When 0 ≤ P f (i) < P bat-max and {SOC(i - 1) < SOC min || (SOC(i - 1) > SOC(i - 2) && SOC(i - 1) ≤ SOC max )}, then P bat (i) = P bat-min , P D (i) = P f (i) - P bat-min ; When P f (i)<P bat-min And SOC(i)≤SOC max When P bat (i) = P bat-min , P D (i) = 0; When P f (i)<0 and SOC(i)>SOC max When P bat (i) = 0, P D (i) = 0; Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P d-l is the power at the lower boundary of the high efficiency area of ​​the power generation unit, P d-h is the power at the high boundary of the power generation unit’s high efficiency zone, P d-max is the maximum power generated by the power generation unit, P D (i) is the instantaneous output power of the power generation unit, SOC min is the minimum SOC value allowed by the energy storage unit, SOC max is the maximum SOC value allowed by the energy storage unit, and SOC(i) is the instantaneous remaining power percentage of the energy storage unit.

4. The hybrid vehicle energy storage unit operation energy balance control method according to claim 1, characterized in that: The calculation of the load power demand of the vehicle running on the line is: calculating the load power of the vehicle according to the line conditions, load and operation time.

5. The hybrid vehicle energy storage unit operation energy balance control method according to claim 1, characterized in that: Also includes: When the degree of deviation between the final SOC value and the initial SOC value exceeds a threshold, a prompt signal is sent.

6. A hybrid vehicle energy storage unit operating energy balance control device, characterized in that: include: The first calculation module is used to calculate the load power demand of the vehicle running on the line; A pre-allocation module, used for pre-allocating the output power of the power generation unit and the energy storage unit according to the load power demand and the initial SOC value of the energy storage unit; A second calculation module, used for calculating the corresponding relationship between the termination SOC value of the energy storage unit and the initial SOC value after the vehicle runs according to the pre-allocated power; A confirmation module, used for confirming whether to perform balance adjustment control according to the corresponding relationship; A balance adjustment module, configured to adjust the output power of the power generation unit and the energy storage unit according to the corresponding relationship if balance adjustment control is required, so that the termination SOC value is equal to the initial SOC value; The determining whether balance adjustment control is required according to the corresponding relationship includes: If the final SOC value of the energy storage unit is the same as the initial SOC value, confirming that no balancing adjustment control is performed; If the termination SOC value is greater than the initial SOC value, confirming to perform discharge reverse control; If the termination SOC value is less than the initial SOC value, confirming to perform advance charging control; The discharge back-pushing control comprises: Starting from the end of the vehicle operation, update E in descending order according to the unit step length. 储 (i-1) = E 储 (i)-P bat (i) *del, until the final SOC value is the same as the initial SOC value; The principle of updating by decreasing the unit step size is: When P bat-max ≤P f (i) When P bat (i) = P bat-max , P D (i) = P f (i)-P bat-max ; When 0≤P f (i)<P bat-max When P bat (i) = P f (i), P D (i) = 0; When P bat-min ≤P f (i) < 0, P bat (i) = P f (i), P D (i) = 0; When P f (i)<P bat-min When P bat (i) = P bat-min , P D (i) = 0; Among them, P f (i) is the load transient power demand, P bat-max is the maximum power that the energy storage unit can sustainably release, P bat-min is the maximum power that the energy storage unit can sustainably charge, P bat (i) is the transient input and output power of the energy storage unit, P D (i) is the instantaneous output power of the power generation unit, E 总 is the total charge of the energy storage unit, E 储 (i) is the current charge of the energy storage unit, E 储 (i-1) is the power of the energy storage unit at the previous step length before the current moment, and del is the unit step length.

7. A hybrid vehicle energy storage unit operating energy balance control device, characterized in that: comprising a memory for storing a computer program; A processor is used to implement the steps of the hybrid vehicle energy storage unit operating energy balance control method as described in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the hybrid vehicle energy storage unit operation energy balance control method as described in any one of claims 1 to 5 are implemented.

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