Battery power control method, apparatus, device, and storage medium

Abstract

This application provides a battery power control method, apparatus, device, and storage medium, relating to the field of electric vehicle technology. The method obtains the current motor power demand based on the current motor speed and pedal signals indicating brake and accelerator pedal coefficients. After obtaining the actual power of the current motor based on the current motor power demand, it obtains the actual power of the high-voltage accessories based on the obtained high-voltage accessory power demand. The sum of the actual power of the high-voltage accessories and the actual power of the current motor is taken as the total vehicle operating power. In an optimal power allocation table, a target power allocation strategy is obtained based on the total vehicle operating power to indicate the actual output power of the power battery and the fuel cell. This target power allocation strategy is then sent to the execution unit to achieve battery power control of the vehicle, thereby enabling efficient operation of the power battery and fuel cell system and improving the efficiency of the energy conversion process.

Description

Technical Field

[0001] This application relates to electric vehicle technology, and more particularly to a battery power control method, apparatus, device, and storage medium. Background Technology

[0002] With the rapid development of electric vehicle technology, fuel cell vehicles have gradually been put into practical use. Currently, fuel cell vehicles cannot rely solely on fuel cells; they also require a power battery. The power output of the fuel cell during operation and whether the power battery is charging or discharging both affect the overall vehicle efficiency, further impacting energy consumption and driving range.

[0003] Therefore, the timing of fuel cell operation, the magnitude of its operating power, and the combined control scheme with the power battery have a significant impact on the performance of fuel cell vehicles. However, the power following or power segmentation control methods used in existing control schemes cannot combine actual working scenarios and theoretical calculations to perform power distribution control, resulting in poor coordination between the power battery and the fuel cell. This leads to inefficient operation of the power battery and fuel cell system, reduced efficiency during energy conversion, and further impact on driving range.

[0004] Therefore, existing technologies for power distribution control of fuel cells and power batteries in fuel cell vehicles still fall short in terms of improving the efficiency of power batteries and fuel cell systems and enhancing energy conversion efficiency, due to the lack of integration with actual scenarios and theoretical foundations. Summary of the Invention

[0005] This application provides a battery power control method, apparatus, device, and storage medium to address the shortcomings of existing technologies in the efficiency of power battery and fuel cell system operation and energy conversion processes when controlling power distribution between fuel cells and power batteries in fuel cell vehicles.

[0006] In a first aspect, this application provides a battery power control method, comprising:

[0007] The system obtains the current motor speed and pedal signal, obtains the peak motor torque based on the current motor speed, obtains the required motor torque based on the pedal signal and the peak motor torque, and obtains the product of the required motor torque and the current motor speed as the current required motor power. The pedal signal is used to indicate the brake pedal coefficient and the accelerator pedal coefficient.

[0008] Obtain the required power of the high-voltage accessory, obtain the actual power of the high-voltage accessory based on the required power, obtain the actual power of the current motor based on the required power of the current motor, and take the sum of the actual power of the high-voltage accessory and the actual power of the current motor as the total operating power of the vehicle.

[0009] In the optimal power allocation table, a target power allocation strategy is obtained based on the total operating power of the vehicle, and the target power allocation strategy is sent to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

[0010] In one possible design, obtaining the peak torque of the motor based on the current motor speed includes:

[0011] In the motor external characteristic table, the peak torque of the motor is obtained by querying based on the current motor speed. The motor external characteristic table pre-stores multiple sets of motor speeds and peak torques, and the motor speed and the peak torque are inversely proportional.

[0012] The product of the brake pedal coefficient and accelerator pedal coefficient indicated by the pedal signal and the peak torque of the motor is obtained as the required torque of the motor.

[0013] In one possible design, obtaining the actual power of the high-voltage accessory based on its required power includes:

[0014] In the high-voltage accessory efficiency table, the efficiency of the high-voltage accessory is obtained by querying the power demand of the high-voltage accessory. The high-voltage accessory efficiency table pre-stores the power and efficiency of each high-voltage accessory, and the power of the high-voltage accessory is inversely proportional to the efficiency of the accessory.

[0015] The quotient of the required power of the high-voltage accessory and the efficiency of the high-voltage accessory is obtained as the actual power of the high-voltage accessory;

[0016] The actual power of the motor is obtained based on the current motor power demand.

[0017] In one possible design, obtaining the current actual power of the motor based on the current motor power demand includes:

[0018] In the motor efficiency MAP table, the current motor efficiency is obtained by querying based on the current motor speed and the motor required torque. The motor efficiency MAP table pre-stores multiple sets of motor speed, motor torque and motor efficiency. The motor speed and the motor efficiency are inversely proportional. The motor torque and the motor efficiency are inversely proportional.

[0019] The quotient of the current motor power requirement and the current motor efficiency is obtained as the current motor actual power.

[0020] In one possible design, before obtaining the target power allocation strategy based on the total vehicle operating power, the method further includes:

[0021] Obtain a basic allocation strategy table, which pre-stores multiple sets of different basic total operating power. Each basic total operating power corresponds to multiple allocation strategy groups. Each allocation strategy group is used to indicate different power demand of the power battery and the power demand of the fuel cell. Among the multiple power demand of the power battery and the power demand of the fuel cell corresponding to each basic total operating power, the power demand of the power battery and the power demand of the fuel cell are inversely proportional.

[0022] In the power battery efficiency table, based on the power demand of each power battery, the power of the same power battery is obtained by querying, and the corresponding power battery efficiency is obtained based on the power of the same power battery. The quotient of the power demand of each power battery and the corresponding power battery efficiency is obtained as the actual power of the power battery corresponding to the power demand of each power battery.

[0023] The power battery efficiency table stores multiple sets of different battery voltages, battery currents, and power battery power, and the corresponding power battery power is obtained based on each battery voltage and battery current.

[0024] In the fuel cell efficiency table, based on the power demand of each fuel cell, the same fuel cell power is retrieved, and the corresponding fuel cell efficiency is obtained based on the same fuel cell power. The quotient of the power demand of each fuel cell and the corresponding fuel cell efficiency is obtained as the actual power of the fuel cell corresponding to the power demand of each fuel cell.

[0025] The fuel cell efficiency table stores multiple sets of different fuel cell power and fuel cell efficiency, with the fuel cell power and fuel cell efficiency being inversely proportional.

[0026] The actual power of the power source for each allocation strategy group is obtained based on the actual power of each power battery and the actual power of the fuel cell.

[0027] In one possible design, obtaining the actual power source power of each allocation strategy group based on the actual power of each of the power batteries and the actual power of the fuel cells includes:

[0028] Based on the multiple allocation strategy groups corresponding to each of the basic total operating power indicated by the basic allocation strategy table, the sum of the actual power of the power battery corresponding to the power battery demand power in each allocation strategy group and the actual power of the fuel cell corresponding to the fuel cell demand power is obtained as the actual power of the power source in each allocation strategy group.

[0029] Based on the correspondence between each allocation strategy group and each of the basic total operating power, the actual power of each power source and each of the basic total operating power are associated and stored in the allocation strategy information database, so that each of the basic total operating power corresponds to the actual power of multiple power sources.

[0030] In the allocation strategy information database, the quotient of the total operating power of the vehicle and the actual power of each power source is obtained as the overall efficiency of each allocation strategy group, and the optimal power allocation table is obtained based on the overall efficiency of each allocation strategy group.

[0031] The optimal power allocation table stores the basic total operating power and target allocation strategy groups. The target allocation strategy groups are used to indicate the optimal actual power of the power battery and the actual power of the fuel cell under the corresponding basic total operating power, based on the overall efficiency of the corresponding allocation strategy groups.

[0032] In one possible design, obtaining the optimal actual power of the power battery and the actual power of the fuel cell based on the overall efficiency of the corresponding allocation strategy groups includes:

[0033] Among the multiple allocation strategy groups corresponding to each of the basic total operating power, the allocation strategy group with the highest overall efficiency is selected as the target allocation strategy group.

[0034] In the optimal power allocation table, the same basic total operating power is obtained by querying the total operating power of the vehicle, and the actual power of the power battery and the actual power of the fuel cell corresponding to the target allocation strategy group are obtained based on the same basic total operating power, which are used as the actual output power of the power battery and the actual output power of the fuel cell indicated by the target power allocation strategy.

[0035] Secondly, this application provides a battery power control device, comprising:

[0036] The acquisition module is used to acquire the current motor speed and pedal signal, acquire the peak torque of the motor based on the current motor speed, acquire the required torque of the motor based on the pedal signal and the peak torque of the motor, and acquire the product of the required torque of the motor and the current motor speed as the current required power of the motor. The pedal signal is used to indicate the brake pedal coefficient and the accelerator pedal coefficient.

[0037] The processing module is used to obtain the power demand of the high-voltage accessory, obtain the actual power of the high-voltage accessory based on the power demand, obtain the actual power of the current motor based on the current motor power demand, and take the sum of the actual power of the high-voltage accessory and the actual power of the current motor as the total operating power of the vehicle.

[0038] The execution module is used to obtain a target power allocation strategy from the optimal power allocation table based on the total operating power of the vehicle, and send the target power allocation strategy to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

[0039] Thirdly, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0040] The memory stores computer-executed instructions;

[0041] The processor executes computer execution instructions stored in the memory to implement the battery power control method.

[0042] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement a battery power control method.

[0043] This application provides a battery power control method, apparatus, device, and storage medium. It obtains the current motor power demand based on the current motor speed and pedal signals indicating brake and accelerator pedal coefficients, then obtains the actual current motor power, the high-voltage accessory power demand, and the high-voltage accessory actual power. The sum of the high-voltage accessory actual power and the current motor actual power is used as the vehicle's total operating power. In an optimal power allocation table combining the vehicle's power demand and actual power, a target power allocation strategy is obtained based on the total vehicle operating power to indicate the actual output power of the power battery and fuel cell. This target power allocation strategy is then sent to the execution unit to achieve battery power control of the vehicle. This approach combines practical scenarios and theoretical foundations, enabling efficient operation of the power battery and fuel cell system and improving efficiency in the energy conversion process. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A flowchart illustrating the battery power control method provided in the embodiments of this application. Figure 1 ;

[0046] Figure 2A flowchart illustrating the battery power control method provided in the embodiments of this application. Figure 2 ;

[0047] Figure 3 This is a schematic diagram of the battery power control device provided in the embodiments of this application;

[0048] Figure 4 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0050] As a type of electric vehicle, fuel cell vehicles obtain electrical energy through the chemical reaction of hydrogen and oxygen. The chemical reaction process of fuel cells does not produce harmful byproducts, so fuel cell vehicles are pollution-free cars. The energy conversion efficiency of fuel cells is two to three times higher than that of internal combustion engines. Therefore, in terms of energy utilization and environmental protection, fuel cell vehicles are ideal vehicles. However, in the current operation of fuel cell vehicles, they cannot operate normally solely through fuel cells. Therefore, existing fuel cell vehicles also require the installation of power batteries to work in conjunction with the fuel cells.

[0051] Existing technologies typically control the power distribution between fuel cells and power batteries using power following or power segmentation control methods. However, these methods lack a practical and theoretical basis for power distribution. For example, they fail to consider the difference between actual output power and theoretically required power, which leads to variations in overall efficiency. This results in poor coordination between the power battery and fuel cell, hindering the efficient operation of the power battery and fuel cell system. Consequently, energy conversion efficiency is reduced, impacting driving range.

[0052] This application provides a battery power control method. It obtains the current motor power demand based on the current motor speed and pedal signals indicating brake and accelerator pedal coefficients, then obtains the actual current motor power, the high-voltage accessory power demand, and the high-voltage accessory actual power. The sum of the high-voltage accessory actual power and the current motor actual power is used as the vehicle's total operating power. In an optimal power allocation table combining the vehicle's power demand and actual power, a target power allocation strategy is obtained based on the total vehicle operating power to indicate the actual output power of the power battery and fuel cell. This target power allocation strategy is then sent to the execution unit to achieve battery power control of the vehicle. This method combines practical scenarios and theoretical foundations, enabling efficient operation of the power battery and fuel cell system and improving efficiency in the energy conversion process.

[0053] Specifically, this application obtains the current power demand of the motor system and the power demand of the high-voltage accessories based on the vehicle's status; based on the motor system efficiency MAP data and the high-voltage accessory operating efficiency data, it obtains the actual operating power of the current motor system and the actual operating power of the high-voltage accessories, thus obtaining the total operating power of the vehicle; based on the power battery charge / discharge efficiency data and fuel cell power efficiency data, it uses Simulink to build an optimization model, imports the summarized total operating power data of the vehicle, and obtains the optimal allocation data of the actual operating power of the power battery and the actual power of the fuel cell corresponding to the total operating power of each vehicle based on the principle of optimal efficiency; during actual vehicle operation, based on the calculated total operating power of the current vehicle and the optimal allocation data, it performs power allocation control on the power battery and the fuel cell. Therefore, for fuel cell vehicles, the solution proposed in this application can allocate the operating power of the power battery and the operating power of the fuel cell with optimal efficiency, enabling vehicles equipped with the same capacity power battery and fuel cell to have a longer driving range.

[0054] The technical solutions of this application and how they solve the aforementioned technical problems are described in detail below using specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0055] Example 1

[0056] Figure 1 A flowchart illustrating the battery power control method provided in the embodiments of this application. Figure 1 .like Figure 1 As shown, the method includes:

[0057] S101. Obtain the current motor speed and pedal signal, obtain the motor peak torque based on the current motor speed, obtain the motor demand torque based on the pedal signal and the motor peak torque, obtain the product of the motor demand torque and the current motor speed as the current motor demand power, and use the pedal signal to indicate the brake pedal coefficient and accelerator pedal coefficient.

[0058] Specifically, after obtaining the current motor speed and pedal signal of the vehicle, the corresponding peak motor torque is obtained by looking up the motor external characteristic table based on the current motor speed. The required motor torque is calculated based on the obtained peak motor torque and the brake pedal coefficient and accelerator pedal coefficient indicated by the pedal signal. The product of the required motor torque and the current motor speed is used as an indication of the power that the current vehicle motor needs to consume, that is, the current motor power requirement.

[0059] S102. Obtain the required power of the high-voltage accessory, obtain the actual power of the high-voltage accessory based on the required power of the high-voltage accessory, obtain the actual power of the current motor based on the required power of the current motor, and take the sum of the actual power of the high-voltage accessory and the actual power of the current motor as the total operating power of the vehicle.

[0060] Specifically, based on the accessory switch status, the power required by the current vehicle accessories such as air conditioning, defrosting, steering, and braking high-voltage accessories is obtained. According to the power required by each high-voltage accessory, the corresponding accessory efficiency is obtained from the high-voltage accessory efficiency table. The actual power of each accessory is obtained based on the power required by each high-voltage accessory and the corresponding accessory efficiency. The sum of the actual power of each accessory is taken as the actual power of the high-voltage accessory. According to the current motor demand power, the corresponding current motor efficiency is obtained from the motor efficiency MAP table. The actual power of the current motor is obtained based on the current motor demand power and the current motor efficiency.

[0061] S103. In the optimal power allocation table, a target power allocation strategy is obtained based on the total operating power of the vehicle, and the target power allocation strategy is sent to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

[0062] Specifically, after obtaining the total operating power of the vehicle based on the actual power of the high-voltage accessories and the current actual power of the motor, the system queries the optimal power allocation table to obtain the base total operating power that is the same as the total operating power of the vehicle, and obtains the target power allocation strategy based on the same base total operating power. The optimal power allocation table stores multiple base total operating powers and corresponding target allocation strategy groups. The target allocation strategy group is used to indicate the optimal actual power of the power battery and the actual power of the fuel cell under the corresponding base total operating power.

[0063] This embodiment provides a battery power control method that obtains the current motor power demand based on the current motor speed and pedal signals used to indicate the brake pedal coefficient and accelerator pedal coefficient. It then obtains the current actual motor power based on the current motor power demand, the high-voltage accessory power demand, and the high-voltage accessory power actual. The sum of the high-voltage accessory power and the current motor power is used as the vehicle's total operating power. In an optimal power allocation table combining the vehicle's power demand and actual power, a target power allocation strategy is obtained based on the total vehicle operating power to indicate the actual output power of the power battery and the fuel cell. This target power allocation strategy is sent to the execution unit to achieve battery power control of the vehicle. This method combines practical scenarios and theoretical foundations, enabling the power battery and fuel cell system to operate efficiently and improving the efficiency of the energy conversion process.

[0064] The following specific embodiment will be used to describe the battery power control method of this application in detail.

[0065] Example 2

[0066] Figure 2 A flowchart illustrating the battery power control method provided in the embodiments of this application. Figure 2 .like Figure 2 As shown, the method includes:

[0067] S201. Obtain the current motor speed and pedal signal, and query the motor peak torque in the motor external characteristic table according to the current motor speed;

[0068] Specifically, after obtaining the current vehicle's motor speed and pedal signal, the system queries the motor external characteristic table to find the same motor speed, and then obtains the corresponding peak torque based on that same motor speed as the motor peak torque. The motor external characteristic table pre-stores multiple sets of motor speeds and peak torques, and the motor speed is inversely proportional to the peak torque. The motor external characteristic table is shown in Table 1.

[0069] Table 1

[0070] Motor speed / rpm Peak torque of motor / Nm 0 720 500 720 1000 720 1500 720 ... ... ... ... 4000 720 4500 720 ... ... ... ... 7000 400 7500 320 ... ... 10000 190

[0071] S202. Obtain the product of the brake pedal coefficient and accelerator pedal coefficient indicated by the pedal signal and the peak torque of the motor, and use it as the required torque of the motor.

[0072] Specifically, after obtaining the peak torque of the motor, the required torque of the motor is calculated based on the accelerator pedal signal, the brake pedal signal, and the peak torque of the motor at the current motor speed, using the following formula:

[0073] Treq =f(x1)·f(x2)·T peak ;

[0074] Where f(x1) is the brake pedal opening coefficient, f(x2) is the accelerator pedal opening coefficient, and T peak T represents the peak torque of the motor. req This is the torque required by the motor.

[0075] S203. Obtain the required power of the high-voltage accessory, and query the high-voltage accessory efficiency in the high-voltage accessory efficiency table according to the required power of the high-voltage accessory;

[0076] Specifically, based on the accessory switch status, the power required by the current vehicle accessories, such as air conditioning and defrosting high-voltage accessories, is obtained. Then, according to the power required by each high-voltage accessory, the corresponding accessory efficiency is obtained from the high-voltage accessory efficiency table. This table includes multiple accessory efficiency tables, such as an air conditioning efficiency table and a defrosting efficiency table. The air conditioning efficiency table is shown in Table 2.

[0077] Table 2

[0078] High-pressure air conditioning power / Kw efficiency 2 0.91 2.1 0.92 ... ... 3 0.87 ... ... 5 0.86 ... ...

[0079] The defrosting efficiency is shown in Table 3:

[0080] Table 3

[0081] High-pressure defrosting power / Kw efficiency 1 0.91 2 0.92 ... ... 3 0.87 ... ...

[0082] S204. Obtain the quotient of the required power of the high-voltage accessory and the efficiency of the high-voltage accessory, and use it as the actual power of the high-voltage accessory;

[0083] Specifically, after obtaining the corresponding high-voltage accessory efficiency from the high-voltage accessory efficiency table, the quotient of the power required by each high-voltage accessory and the corresponding accessory efficiency is taken as the actual power of each accessory, and the sum of the actual power of each accessory is taken as the actual power of the high-voltage accessory.

[0084] S205. In the motor efficiency MAP table, the current motor efficiency is obtained by querying the current motor speed and the motor required torque. The quotient of the current motor required power and the current motor efficiency is obtained as the current motor actual power. The sum of the actual power of the high-voltage accessory and the actual power of the current motor is used as the total operating power of the vehicle.

[0085] Specifically, in the motor efficiency MAP table, the same motor speed and torque are retrieved based on the current motor speed and the required motor torque. The corresponding motor efficiency is then obtained based on this same motor speed and torque and used as the current motor efficiency. The motor efficiency MAP table pre-stores multiple sets of motor speed, motor torque, and motor efficiency. Motor speed and motor efficiency are inversely proportional, and motor torque and motor efficiency are also inversely proportional. The motor efficiency MAP table is illustrated in Table 4.

[0086] Table 4

[0087] engine speed / rpm Torque / Nm motor efficiency ... ... ... 700.04 11.42 94.27 700.04 22.93 94.07 ... ... ... 700.03 220.54 84.06 ... ... ... 1399.68 22.67 93.88 ... ... ... 2099.74 11.06 91.37 ... ... ... 2099.73 231.79 92.02 ... ... ... 2799.77 10.82 89.61 ... ... ... 2799.78 218.02 93.55 ... ... ... 3979.55 21.93 92.23 ... ... ... 7099.66 16.13 88.98 ... ... ... 7099.68 181.06 95.74 7799.71 6.15 73.88 ... ... ... 7799.72 164.82 95.72 ... ... ... 10599.86 96.78 95.31 ... ... ...

[0088] S206. In the power battery efficiency table, obtain the corresponding actual power of the power battery according to the power demand of each power battery.

[0089] Specifically, after obtaining the total operating power of the vehicle, a basic allocation strategy table is obtained. The basic allocation strategy table pre-stores multiple different basic total operating power, which is the total operating power of the vehicle. Each basic total operating power corresponds to multiple allocation strategy groups. Each allocation strategy group is used to indicate different power requirements of the power battery and the fuel cell. The basic allocation strategy table is shown in Table 5.

[0090] Table 5

[0091]

[0092] For the basic allocation strategy table, the total operating power of all vehicles is summarized. All allocation schemes for the power demand of the power battery and the power demand of the fuel cell are listed. The power allocation interval step size is set based on the maximum value of the power battery power, fuel cell power, and the total operating power of the vehicles. For example, if the total operating power of the vehicles is 80kW and the interval step size is 1, the allocation schemes are [80, 0]; [79, 1]; [78, 2]; ...; [2, 78]; [1, 79]; [0, 80]; [-1, 81]; [-2, 82]; ..., where the former, such as 79, represents the power demand of the power battery, and the latter, such as 1, represents the power demand of the fuel cell. The fuel cell requires power; positive values ​​represent discharge power, and negative values ​​represent charging power. [80, 0] indicates the power battery requires 80kW and is in a discharge state, while the fuel cell requires 0kW and is not operating; in this case, the power battery provides all the energy to the vehicle. [0, 80] indicates the power battery requires 0kW and does not output power externally, while the fuel cell requires 80kW and is in a discharge state; in this case, the fuel cell provides all the energy to the vehicle. [-2, 82] indicates the power battery requires -2kW and is in a charging state, while the fuel cell requires 82kW and is in a discharge state; in this case, the fuel cell not only provides all the energy to the vehicle but also charges the power battery.

[0093] Furthermore, when processing the allocation scheme, the maximum output power of the fuel cell and the maximum allowable charge and discharge power of the power battery need to be used as boundary conditions. The maximum output power of the fuel cell and the maximum allowable charge and discharge power of the power battery must not be exceeded. In addition, the thermal management conditions of the power battery temperature range and the power battery charge range must be met in order to protect the charge and discharge power of the power battery.

[0094] Furthermore, in the power battery efficiency table, based on the power demand of each power battery, the power of the same power battery is retrieved, and the corresponding power battery efficiency is obtained based on the power demand of each power battery. The quotient of the power demand of each power battery and the corresponding power battery efficiency is obtained as the actual power of the power battery corresponding to the power demand of each power battery. The power battery efficiency table stores multiple sets of different battery voltages, battery currents, and power batteries. The corresponding power battery power is obtained based on each battery voltage and battery current. The power battery efficiency table is shown in Table 6.

[0095] Table 6

[0096] Voltage / V Current / A Power battery efficiency 500 300 0.93 500 400 0.92 ... ... ... 600 200 0.92 650 300 0.92 ... ... ... 650 -300 0.91 600 -200 0.92 ... ... ... 500 -100 0.91 ... ... ...

[0097] S207. In the fuel cell efficiency table, obtain the corresponding actual power of the fuel cell according to the power demand of each fuel cell.

[0098] Specifically, in the fuel cell efficiency table, based on the power demand of each fuel cell, the corresponding fuel cell power is retrieved, and the corresponding fuel cell efficiency is obtained based on the corresponding fuel cell power. The quotient of the power demand of each fuel cell and the corresponding fuel cell efficiency is then used as the actual power of the fuel cell corresponding to the power demand of each fuel cell. The fuel cell efficiency table stores multiple sets of different fuel cell power and fuel cell efficiency. The fuel cell power and fuel cell efficiency are inversely proportional. The fuel cell efficiency table is shown in Table 7.

[0099] Table 7

[0100] Fuel cell power / kW fuel cell efficiency ... ... 12 0.63 20 0.58 28 0.55 36 0.52 42 0.49 48 0.45 ... ...

[0101] S208. Based on the multiple allocation strategy groups corresponding to each basic total operating power indicated by the basic allocation strategy table, obtain the sum of the actual power of the power battery corresponding to the power battery demand power in each allocation strategy group and the actual power of the fuel cell corresponding to the fuel cell demand power, and use it as the actual power of the power source in each allocation strategy group.

[0102] Specifically, after obtaining the actual power of the power battery corresponding to the power demand of each power battery and the actual power of the fuel cell corresponding to the power demand of each fuel cell, the sum of the actual power of the power battery corresponding to the power demand of each power battery and the actual power of the fuel cell corresponding to the power demand of each allocation strategy group is obtained based on the actual power of each power battery and the actual power of the fuel cell. In other words, the actual power of the power source of each allocation strategy group in the basic allocation strategy table is obtained, which is also the actual power consumed by the vehicle power source system.

[0103] Furthermore, the actual power consumed by the vehicle's power source system = the actual power of the power battery + the actual power of the fuel cell. Under different allocation schemes, that is, each allocation strategy group calculates the corresponding actual power consumed by the vehicle's power source system.

[0104] S209. Based on the correspondence between each allocation strategy group and each of the basic total operating power, the actual power of each power source and the basic total operating power are associated and stored in the allocation strategy information database.

[0105] Specifically, after obtaining the actual power of the power source of each allocation strategy group, based on the correspondence between the total basic operating power indicated in the basic allocation strategy table and each allocation strategy group, the actual power of the power source of each allocation strategy group is associated with the corresponding total basic operating power and stored in the allocation strategy information database, so that each total basic operating power corresponds to the actual power of multiple power sources.

[0106] S210. In the allocation strategy information database, obtain the quotient of the total operating power of the vehicle and the actual power of each power source as the overall efficiency of each allocation strategy group, and obtain the optimal power allocation table based on the overall efficiency of each allocation strategy group.

[0107] Specifically, the actual power of each power source in the allocation strategy information database is obtained, and the quotient of the total vehicle operating power and the actual power of the power source corresponding to each allocation strategy group is obtained as the overall efficiency of each allocation strategy group. The overall efficiency of multiple allocation strategy groups corresponding to each basic total operating power is imported through the Simulink model. Among the multiple allocation strategy groups corresponding to each basic total operating power, the allocation strategy group with the highest overall efficiency is obtained through iterative optimization and is used as the target allocation strategy group corresponding to that basic total operating power. In this way, all target allocation strategy groups corresponding to the basic total operating power are obtained, and an optimal power allocation table is generated based on all target allocation strategy groups corresponding to the basic total operating power.

[0108] The optimal power allocation table stores the basic total operating power and the corresponding target allocation strategy group. The target allocation strategy group is used to indicate the optimal actual power of the power battery and the actual power of the fuel cell under the corresponding basic total operating power, based on the overall efficiency of the corresponding allocation strategy group. The optimal power allocation table is shown in Table 8.

[0109] Table 8

[0110]

[0111] S211. In the optimal power allocation table, the same basic total operating power is obtained by querying the total operating power of the vehicles, and the corresponding target allocation strategy group is obtained based on the same basic total operating power.

[0112] Specifically, after obtaining the optimal power allocation table, based on the vehicle's total operating power, the system queries the optimal power allocation table to obtain the same basic total operating power. The actual power of the power battery and the actual power of the fuel cell, as indicated by the target allocation strategy group corresponding to the same basic total operating power, are used as the actual output power of the power battery and the actual output power of the fuel cell indicated by the target power allocation strategy. The target power allocation strategy is then sent to the execution unit to achieve power allocation control of the vehicle's power battery and fuel cell, thereby optimizing the efficiency of the fuel cell vehicle and ensuring that the vehicle can travel a longer distance when equipped with a certain capacity power battery and a certain amount of hydrogen fuel cell system.

[0113] This embodiment provides a battery power control method that obtains the current motor power demand based on the current motor speed and pedal signals used to indicate the brake pedal coefficient and accelerator pedal coefficient. It then obtains the current actual motor power based on the current motor power demand, the high-voltage accessory power demand, and the high-voltage accessory power actual. The sum of the high-voltage accessory power and the current motor power is used as the vehicle's total operating power. In an optimal power allocation table combining the vehicle's power demand and actual power, a target power allocation strategy is obtained based on the total vehicle operating power to indicate the actual output power of the power battery and the fuel cell. This target power allocation strategy is sent to the execution unit to achieve battery power control of the vehicle. This method combines practical scenarios and theoretical foundations, enabling the power battery and fuel cell system to operate efficiently and improving the efficiency of the energy conversion process.

[0114] In this embodiment of the invention, electronic devices or main control devices can be divided into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment of the invention is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0115] Figure 3 This is a schematic diagram of the battery power control device provided in an embodiment of this application. Figure 3 As shown, the device 30 includes:

[0116] The acquisition module 301 is used to acquire the current motor speed and pedal signal, acquire the motor peak torque based on the current motor speed, acquire the motor demand torque based on the pedal signal and the motor peak torque, and acquire the product of the motor demand torque and the current motor speed as the current motor demand power. The pedal signal is used to indicate the brake pedal coefficient and the accelerator pedal coefficient.

[0117] Processing module 302 is used to obtain the power demand of high-voltage accessories, obtain the actual power of high-voltage accessories based on the power demand of high-voltage accessories, obtain the actual power of the current motor based on the power demand of the current motor, and take the sum of the actual power of high-voltage accessories and the actual power of the current motor as the total operating power of the vehicle.

[0118] The execution module 303 is used to obtain a target power allocation strategy from the optimal power allocation table based on the total operating power of the vehicle, and send the target power allocation strategy to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

[0119] Furthermore, the acquisition module 301 is specifically used to query and obtain the peak torque of the motor based on the current motor speed in the motor external characteristic table, wherein the motor external characteristic table pre-stores multiple sets of motor speeds and peak torques, and the motor speed and the peak torque are inversely proportional.

[0120] The product of the brake pedal coefficient and accelerator pedal coefficient indicated by the pedal signal and the peak torque of the motor is obtained as the required torque of the motor.

[0121] Furthermore, the processing module 302 is specifically used to query and obtain the efficiency of high-voltage accessories from the high-voltage accessory efficiency table based on the required power of the high-voltage accessories. The high-voltage accessory efficiency table pre-stores the power and efficiency of each high-voltage accessory, and the power of the high-voltage accessory is inversely proportional to the accessory efficiency.

[0122] The quotient of the required power of the high-voltage accessory and the efficiency of the high-voltage accessory is obtained as the actual power of the high-voltage accessory;

[0123] The actual power of the motor is obtained based on the current motor power demand.

[0124] Furthermore, the processing module 302 is specifically used to query and obtain the current motor efficiency in the motor efficiency MAP table based on the current motor speed and the motor required torque. The motor efficiency MAP table pre-stores multiple sets of motor speed, motor torque and motor efficiency. The motor speed is inversely proportional to the motor efficiency, and the motor torque is inversely proportional to the motor efficiency.

[0125] The quotient of the current motor power requirement and the current motor efficiency is obtained as the current motor actual power.

[0126] Furthermore, the execution module 303 is also used to obtain a basic allocation strategy table, which pre-stores multiple sets of different basic total operating power. Each basic total operating power corresponds to multiple allocation strategy groups. Each allocation strategy group is used to indicate different power demand of the power battery and power demand of the fuel cell. Among the multiple power demand of the power battery and power demand of the fuel cell corresponding to each basic total operating power, the power demand of the power battery and the power demand of the fuel cell are inversely proportional.

[0127] In the power battery efficiency table, based on the power demand of each power battery, the power of the same power battery is obtained by querying, and the corresponding power battery efficiency is obtained based on the power of the same power battery. The quotient of the power demand of each power battery and the corresponding power battery efficiency is obtained as the actual power of the power battery corresponding to the power demand of each power battery.

[0128] The power battery efficiency table stores multiple sets of different battery voltages, battery currents, and power battery power, and the corresponding power battery power is obtained based on each battery voltage and battery current.

[0129] In the fuel cell efficiency table, based on the power demand of each fuel cell, the same fuel cell power is retrieved, and the corresponding fuel cell efficiency is obtained based on the same fuel cell power. The quotient of the power demand of each fuel cell and the corresponding fuel cell efficiency is obtained as the actual power of the fuel cell corresponding to the power demand of each fuel cell.

[0130] The fuel cell efficiency table stores multiple sets of different fuel cell power and fuel cell efficiency, with the fuel cell power and fuel cell efficiency being inversely proportional.

[0131] The actual power of the power source for each allocation strategy group is obtained based on the actual power of each power battery and the actual power of the fuel cell.

[0132] Furthermore, the execution module 303 is specifically used to obtain the sum of the actual power of the power battery corresponding to the power battery demand power and the actual power of the fuel cell corresponding to the fuel cell demand power in each allocation strategy group based on the multiple allocation strategy groups corresponding to each of the basic total operating power indicated by the basic allocation strategy table, and to use it as the actual power of the power source in each allocation strategy group.

[0133] Based on the correspondence between each allocation strategy group and each of the basic total operating power, the actual power of each power source and each of the basic total operating power are associated and stored in the allocation strategy information database, so that each of the basic total operating power corresponds to the actual power of multiple power sources.

[0134] In the allocation strategy information database, the quotient of the total operating power of the vehicle and the actual power of each power source is obtained as the overall efficiency of each allocation strategy group, and the optimal power allocation table is obtained based on the overall efficiency of each allocation strategy group.

[0135] The optimal power allocation table stores the basic total operating power and target allocation strategy groups. The target allocation strategy groups are used to indicate the optimal actual power of the power battery and the actual power of the fuel cell under the corresponding basic total operating power, based on the overall efficiency of the corresponding allocation strategy groups.

[0136] Furthermore, the execution module 303 is specifically used to select the allocation strategy group with the highest overall efficiency from among the multiple allocation strategy groups corresponding to each of the basic total operating power groups, as the target allocation strategy group.

[0137] In the optimal power allocation table, the same basic total operating power is obtained by querying the total operating power of the vehicle, and the actual power of the power battery and the actual power of the fuel cell corresponding to the target allocation strategy group are obtained based on the same basic total operating power, which are used as the actual output power of the power battery and the actual output power of the fuel cell indicated by the target power allocation strategy.

[0138] The battery power control device provided in this embodiment can execute the battery power control method of the above embodiment. Its implementation principle and technical effect are similar, and will not be described again in this embodiment.

[0139] In the specific implementation of the aforementioned battery power control device, each module can be implemented as a processor. The processor can execute computer execution instructions stored in the memory, causing the processor to execute the aforementioned battery power control method.

[0140] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 4 As shown, the electronic device 40 includes at least one processor 401 and a memory 402. The processor 401 and the memory 402 are connected via a bus 403.

[0141] In a specific implementation, at least one processor 401 executes computer execution instructions stored in the memory 402, causing at least one processor 401 to execute the battery power control method executed on the electronic device side as described above.

[0142] The specific implementation process of processor 401 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0143] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0144] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage.

[0145] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0146] The above description of the functions implemented by electronic devices and main control devices has introduced the solutions provided by the embodiments of the present invention. It is understood that, in order to implement the above functions, the electronic device or main control device includes hardware structures and / or software modules corresponding to the execution of each function. By combining the units and algorithm steps of the various examples described in the embodiments of the present invention, the embodiments of the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present invention.

[0147] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-mentioned battery power control method.

[0148] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0149] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in an electronic device or a host device.

[0150] This application also provides a computer program product, comprising: a computer program stored in a readable storage medium, wherein at least one processor of an electronic device can read the computer program from the readable storage medium, and the at least one processor executes the computer program to cause the electronic device to perform the scheme provided in any of the above embodiments.

[0151] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery power control method, characterized in that, The method includes: The system obtains the current motor speed and pedal signal, obtains the peak motor torque based on the current motor speed, obtains the required motor torque based on the pedal signal and the peak motor torque, and obtains the product of the required motor torque and the current motor speed as the current required motor power. The pedal signal is used to indicate the brake pedal coefficient and the accelerator pedal coefficient. Obtain the required power of the high-voltage accessory, obtain the actual power of the high-voltage accessory based on the required power, obtain the actual power of the current motor based on the required power of the current motor, and take the sum of the actual power of the high-voltage accessory and the actual power of the current motor as the total operating power of the vehicle. In the optimal power allocation table, a target power allocation strategy is obtained based on the total operating power of the vehicle, and the target power allocation strategy is sent to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

2. The method according to claim 1, characterized in that, The step of obtaining the peak torque of the motor based on the current motor speed includes: In the motor external characteristic table, the peak torque of the motor is obtained by querying based on the current motor speed. The motor external characteristic table pre-stores multiple sets of motor speeds and peak torques, and the motor speed and the peak torque are inversely proportional. The product of the brake pedal coefficient and accelerator pedal coefficient indicated by the pedal signal and the peak torque of the motor is obtained as the required torque of the motor.

3. The method according to claim 1, characterized in that, The step of obtaining the actual power of the high-voltage accessory based on the required power of the high-voltage accessory includes: In the high-voltage accessory efficiency table, the efficiency of the high-voltage accessory is obtained by querying the power demand of the high-voltage accessory. The high-voltage accessory efficiency table pre-stores the power and efficiency of each high-voltage accessory, and the power of the high-voltage accessory is inversely proportional to the efficiency of the accessory. The quotient of the required power of the high-voltage accessory and the efficiency of the high-voltage accessory is obtained as the actual power of the high-voltage accessory; The actual power of the motor is obtained based on the current motor power demand.

4. The method according to claim 3, characterized in that, The step of obtaining the current actual power of the motor based on the current motor power demand includes: In the motor efficiency MAP table, the current motor efficiency is obtained by querying based on the current motor speed and the motor required torque. The motor efficiency MAP table pre-stores multiple sets of motor speed, motor torque and motor efficiency. The motor speed and the motor efficiency are inversely proportional. The motor torque and the motor efficiency are inversely proportional. The quotient of the current motor power requirement and the current motor efficiency is obtained as the current motor actual power.

5. The method according to claim 1, characterized in that, Before obtaining the target power allocation strategy based on the total vehicle operating power, the method further includes: Obtain a basic allocation strategy table, which pre-stores multiple sets of different basic total operating power. Each basic total operating power corresponds to multiple allocation strategy groups. Each allocation strategy group is used to indicate different power demand of the power battery and the power demand of the fuel cell. Among the multiple power demand of the power battery and the power demand of the fuel cell corresponding to each basic total operating power, the power demand of the power battery and the power demand of the fuel cell are inversely proportional. In the power battery efficiency table, based on the power demand of each power battery, the power of the same power battery is obtained by querying, and the corresponding power battery efficiency is obtained based on the power of the same power battery. The quotient of the power demand of each power battery and the corresponding power battery efficiency is obtained as the actual power of the power battery corresponding to the power demand of each power battery. The power battery efficiency table stores multiple sets of different battery voltages, battery currents, and power battery power, and the corresponding power battery power is obtained based on each battery voltage and battery current. In the fuel cell efficiency table, based on the power demand of each fuel cell, the same fuel cell power is retrieved, and the corresponding fuel cell efficiency is obtained based on the same fuel cell power. The quotient of the power demand of each fuel cell and the corresponding fuel cell efficiency is obtained as the actual power of the fuel cell corresponding to the power demand of each fuel cell. The fuel cell efficiency table stores multiple sets of different fuel cell power and fuel cell efficiency, with the fuel cell power and fuel cell efficiency being inversely proportional. The actual power of the power source for each allocation strategy group is obtained based on the actual power of each power battery and the actual power of the fuel cell.

6. The method according to claim 5, characterized in that, The step of obtaining the actual power source power of each allocation strategy group based on the actual power of each power battery and the actual power of the fuel cell includes: Based on the multiple allocation strategy groups corresponding to each of the basic total operating power indicated by the basic allocation strategy table, the sum of the actual power of the power battery corresponding to the power battery demand power in each allocation strategy group and the actual power of the fuel cell corresponding to the fuel cell demand power is obtained as the actual power of the power source in each allocation strategy group. Based on the correspondence between each allocation strategy group and each of the basic total operating power, the actual power of each power source and each of the basic total operating power are associated and stored in the allocation strategy information database, so that each of the basic total operating power corresponds to the actual power of multiple power sources. In the allocation strategy information database, the quotient of the total operating power of the vehicle and the actual power of each power source is obtained as the overall efficiency of each allocation strategy group, and the optimal power allocation table is obtained based on the overall efficiency of each allocation strategy group. The optimal power allocation table stores the basic total operating power and target allocation strategy groups. The target allocation strategy groups are used to indicate the optimal actual power of the power battery and the actual power of the fuel cell under the corresponding basic total operating power, based on the overall efficiency of the corresponding allocation strategy groups.

7. The method according to claim 6, characterized in that, The step of obtaining the optimal actual power of the power battery and the actual power of the fuel cell based on the overall efficiency of each corresponding allocation strategy group includes: Among the multiple allocation strategy groups corresponding to each of the basic total operating power, the allocation strategy group with the highest overall efficiency is selected as the target allocation strategy group. In the optimal power allocation table, the same basic total operating power is obtained by querying the total operating power of the vehicle, and the actual power of the power battery and the actual power of the fuel cell corresponding to the target allocation strategy group are obtained based on the same basic total operating power, which are used as the actual output power of the power battery and the actual output power of the fuel cell indicated by the target power allocation strategy.

8. A battery power control device, characterized in that, include: The acquisition module is used to acquire the current motor speed and pedal signal, acquire the peak torque of the motor based on the current motor speed, acquire the required torque of the motor based on the pedal signal and the peak torque of the motor, and acquire the product of the required torque of the motor and the current motor speed as the current required power of the motor. The pedal signal is used to indicate the brake pedal coefficient and the accelerator pedal coefficient. The processing module is used to obtain the power demand of the high-voltage accessory, obtain the actual power of the high-voltage accessory based on the power demand, obtain the actual power of the current motor based on the current motor power demand, and take the sum of the actual power of the high-voltage accessory and the actual power of the current motor as the total operating power of the vehicle. The execution module is used to obtain a target power allocation strategy from the optimal power allocation table based on the total operating power of the vehicle, and send the target power allocation strategy to the execution unit to realize the battery power control of the vehicle. The target power allocation strategy is used to indicate the actual output power of the power battery and the actual output power of the fuel cell.

9. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 7.

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