Hydrogen fuel heavy truck energy management method, device, system and medium

Abstract

According to the hydrogen fuel heavy truck energy management method provided by the invention, according to the current electric quantity of a power battery, the optimization objectives of reducing or maintaining the temperature of a battery cell group of the power battery and reducing the hydrogen consumption of a fuel battery system are taken; according to the minimum value of the power system boundary power, the power battery boundary power, the fuel cell system boundary power and the management strategy boundary power as the fuel cell system target power in the current state, the output power of the fuel cell system is adjusted within the minimum variable power time allowed by the fuel cell system; and the endurance of the whole vehicle is prolonged while the dynamic property is considered.

Description

Technical Field

[0001] The present invention relates to a method, device, system and medium for energy management of a hydrogen fuel heavy truck, belonging to the technical field of energy management technology of hydrogen fuel heavy trucks. Background Art

[0002] With the promotion of hydrogen energy policies and the development of the industrial chain, the market share of hydrogen fuel cell vehicles is growing year by year. The current mainstream logic threshold control strategy based on the power battery SOC mostly controls the fuel cell output at several fixed power points. If the strategy is not designed properly, it can easily lead to rapid temperature rise in the power battery, insufficient vehicle power, a poor driving experience, and high hydrogen consumption. Summary of the Invention

[0003] The purpose of the present invention is to provide a hydrogen fuel heavy truck energy management method, device, system and medium. On the basis of ensuring the power of the whole vehicle, the optimization goals are to slow down or maintain the battery temperature rise and reduce hydrogen consumption, determine the hydrogen stack request power, and adjust the output power of the hydrogen stack within the load change frequency allowed by the hydrogen stack.

[0004] In order to achieve the above objectives / solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0005] In one aspect, the present invention provides a method for energy management of a hydrogen fuel heavy truck, comprising:

[0006] Obtain the management strategy boundary power based on the current status of the hydrogen fuel heavy truck;

[0007] Obtain the power system boundary power, power battery boundary power and fuel cell system boundary power of hydrogen fuel heavy trucks;

[0008] The minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power is used as the target power of the fuel cell system in the current state, and according to the minimum power change time allowed by the fuel cell system, the target power of the fuel cell system in the current state is periodically output to the fuel cell.

[0009] Furthermore, obtaining the boundary power of the power system of the hydrogen fuel heavy truck specifically includes:

[0010] Get the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state,

[0011] Obtain the rated power of the hydrogen fuel heavy truck drive motor controller;

[0012] The smaller of the maximum power of the drive motor and the rated power of the drive motor controller is taken as the boundary power of the power system of the hydrogen fuel heavy truck;

[0013] Wherein: obtaining the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state specifically includes:

[0014] When the vehicle is in no-load mode, the maximum power of the drive motor in the current state is set to 50% of the peak power of the hydrogen fuel heavy truck drive motor;

[0015] When the vehicle is in medium load mode, the maximum power of the drive motor in the current state is set to 70% of the peak power of the hydrogen fuel heavy truck drive motor;

[0016] When the vehicle is in heavy-load mode, the maximum power of the drive motor in the current state is set to 100% of the peak power of the hydrogen fuel heavy-duty truck drive motor.

[0017] By setting the boundary power of the power system, you can choose a driving mode suitable for the current scenario for different operating scenarios, and achieve the optimal balance between economy and power by dynamically adjusting the vehicle control strategy.

[0018] Furthermore, the method for obtaining the power battery boundary power specifically includes:

[0019] When I |DC| +I DCF ≥I Rmax When the brake pedal is ineffective for a period of time exceeding the first preset time, the power battery boundary power is ;

[0020] Among them, I |DC| The DC / DC converter output current used by the current hydrogen stack fuel cell, I DCF is the DCF output current of the fuel cell system, I Rmax The maximum pulse recharge current allowed for the power battery, is the idle power of the fuel cell system;

[0021] otherwise, ;

[0022] Wherein, U is the power battery voltage, and the first preset time is half of the recharge over-limit level 1 fault diagnosis time reported by the power battery.

[0023] By setting the boundary power of the power battery and formulating an energy management strategy based on the current state of the battery, it helps to achieve thermal balance of the battery system and increase the battery life. Regardless of whether it is in the charging or discharging state, the above method has a certain degree of reliability.

[0024] Furthermore, the fuel cell system boundary power is the allowable loading power of the fuel cell system.

[0025] The fuel cell system boundary power is set because the fuel cell system boundary power determines its own upper limit, and the fuel cell system can operate stably within this range.

[0026] Furthermore, the method for obtaining the management policy boundary power specifically includes:

[0027] When I |DC| ≥I max +I DCF And this state lasts longer than the second preset time,

[0028] Among them, I |DC| is the absolute value of the actual motor DC bus current, I max The maximum continuous discharge current allowed by the battery, I DCF Output current for the fuel cell system DCF,

[0029] The management policy boundary power is P 动力 , the expression is:

[0030] ;

[0031] Among them, SOC is the percentage of the current power of the power battery to the rated capacity. is the fuel cell system peak power;

[0032] When I |DC| ≥I max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is:

[0033] ;

[0034] in: is the idle power of the fuel cell system;

[0035] When I |DC| max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is:

[0036] ;

[0037] in: is the idle power of the hydrogen stack;

[0038] Wherein: the second preset time is obtained as follows:

[0039] ​The fixed values ​​are set according to the driving mode currently selected by the driver, where the no-load mode is 6s, the medium-load mode is 4s, and the heavy-load mode is 2s.

[0040] By managing the strategic boundary power, the fuel cell system output power can be dynamically adjusted so that the hydrogen fuel heavy truck's power battery, drive motor, drive motor controller and fuel cell system are all within the optimal operating range. While taking into account power, it also increases the vehicle's endurance and reduces the vehicle's hydrogen consumption.

[0041] In a second aspect, the present invention provides an energy management device for a hydrogen fuel heavy truck, comprising:

[0042] Boundary module, used to obtain the boundary power of the power system, power battery and hydrogen stack of hydrogen fuel heavy trucks;

[0043] The processing module is used to take the minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power as the target power of the fuel cell system in the current state, and periodically output the target power of the fuel cell system in the current state to the fuel cell according to the minimum power change time allowed by the fuel cell system.

[0044] In a third aspect, the present invention provides a hydrogen fuel heavy truck energy management system, comprising:

[0045] Memory, used to store computer programs / instructions;

[0046] A processor is used to execute the computer program / instructions to implement the steps of the above-mentioned hydrogen fuel heavy truck energy management method.

[0047] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program / instruction stored thereon. When the computer program / instruction is executed by a processor, the steps of the above-mentioned hydrogen fuel heavy truck energy management method are implemented.

[0048] In a fifth aspect, the present invention provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned hydrogen fuel heavy truck energy management method.

[0049] Compared with the existing technology, the beneficial effects achieved by the present invention are: the present invention takes the current power of the power battery as the optimization goal to reduce or maintain the temperature of its own battery cell group and reduce the hydrogen consumption of the fuel cell system, and adjusts the output power within the minimum power change time allowed by the fuel cell system according to the minimum value of the power system boundary power, the power battery boundary power, the fuel cell system boundary power and the management strategy boundary power as the target power of the fuel cell system in the current state, taking into account the power while also increasing the vehicle's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Shown is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0051] It should be noted that:

[0052] Fuel cell system: A clean, efficient power generation device that converts the chemical energy in fuel directly into electrical energy.

[0053] Powertrain: The drive unit including the drive motor and drive motor controller.

[0054] Power battery: A rechargeable battery system that provides high-power driving energy.

[0055] Drive motor controller rated power: One of the core components of an electric vehicle's powertrain, the controller is responsible for converting the battery's direct current (DC) into alternating current (AC) and precisely controlling the drive motor's speed, torque, and power output. Its rated power is a key indicator of controller performance and directly impacts the vehicle's overall power performance and efficiency.

[0056] Hydrogen stack fuel cell DC / DC converter: converts non-adjustable DC power into adjustable DC power to meet the needs of fuel cell vehicle power system.

[0057] Actual Motor DC Bus Current: The total current of the motor input or output power supply.

[0058] Fuel cell system DCF: short for hydrogen stack fuel cell DC / DC converter.

[0059] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0060] The term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " generally indicates an "or" relationship between the related objects.

[0061] Example 1

[0062] like Figure 1 An embodiment shown in FIG. 1 provides an energy management method for a hydrogen fuel heavy truck, including:

[0063] Obtaining a fuel cell system boundary power, wherein the fuel cell system boundary power is the allowable load power of the fuel cell system; the fuel cell system boundary power determines its own upper limit, within which the fuel cell system can operate stably;

[0064] According to the vehicle mode, obtain the boundary power of the power system of the hydrogen fuel heavy truck, including:

[0065] Get the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state,

[0066] Obtain the rated power of the hydrogen fuel heavy truck drive motor controller;

[0067] The smaller of the maximum power of the drive motor and the rated power of the drive motor controller is taken as the boundary power of the power system of the hydrogen fuel heavy truck;

[0068] Wherein: obtaining the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state specifically includes:

[0069] When the vehicle is in no-load mode, the maximum power of the drive motor in the current state is set to 50% of the peak power of the hydrogen fuel heavy truck drive motor;

[0070] When the vehicle is in medium load mode, the maximum power of the drive motor in the current state is set to 70% of the peak power of the hydrogen fuel heavy truck drive motor;

[0071] When the vehicle is in heavy-load mode, the maximum power of the drive motor in the current state is set to 100% of the peak power of the hydrogen fuel heavy-duty truck drive motor.

[0072] By setting the boundary power of the power system, you can choose a driving mode suitable for the current scenario for different operating scenarios, and achieve the optimal balance between economy and power by dynamically adjusting the vehicle control strategy.

[0073] According to the current state of the hydrogen fuel heavy truck, the power battery boundary power of the hydrogen fuel heavy truck is obtained, specifically including: when I |DC| +I DCF ≥I Rmax When the brake pedal is ineffective for a period of time exceeding the first preset time, the power battery boundary power is ;

[0074] Among them, I |DC| The DC / DC converter output current used by the current hydrogen stack fuel cell, I DCF is the DCF output current of the fuel cell system, I Rmax The maximum pulse recharge current allowed for the power battery, is the idle power of the fuel cell system;

[0075] otherwise, ;

[0076] Wherein, U is the power battery voltage, and the first preset time is half of the recharge over-limit level 1 fault diagnosis time reported by the power battery.

[0077] By setting the boundary power of the power battery and formulating an energy management strategy based on the current state of the battery, it helps to achieve thermal balance of the battery system and increase the battery life. Regardless of whether it is in the charging or discharging state, the above method has a certain degree of reliability.

[0078] According to the current status of the hydrogen fuel heavy truck, the management strategy boundary power is obtained, including:

[0079] When I |DC| ≥I max +I DCF And this state lasts longer than the second preset time,

[0080] Among them, I |DC| is the absolute value of the actual motor DC bus current, I max The maximum continuous discharge current allowed by the battery, I DCF Output current for the fuel cell system DCF,

[0081] The management policy boundary power is P 动力 , the expression is:

[0082] ;

[0083] Among them, SOC is the percentage of the current power of the power battery to the rated capacity. is the fuel cell system peak power;

[0084] When I |DC| ≥I max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is:

[0085] ;

[0086] in: is the idle power of the fuel cell system;

[0087] When I |DC| max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is:

[0088] ;​

[0089] in: is the idle power of the hydrogen stack;

[0090] Wherein: the second preset time is obtained as follows:

[0091] The fixed values ​​are set according to the driving mode currently selected by the driver, where the no-load mode is 6s, the medium-load mode is 4s, and the heavy-load mode is 2s.

[0092] By managing the strategic boundary power, the fuel cell system output power can be dynamically adjusted so that the hydrogen fuel heavy truck's power battery, drive motor, drive motor controller and fuel cell system are all within the optimal operating range. While taking into account power, it also increases the vehicle's endurance and reduces the vehicle's hydrogen consumption.

[0093] The minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power is used as the target power of the fuel cell system in the current state, and according to the minimum power change time allowed by the fuel cell system, the target power of the fuel cell system in the current state is periodically output to the fuel cell.

[0094] Example 2

[0095] This embodiment provides an energy management device for a hydrogen fuel heavy truck, comprising:

[0096] Boundary module, used to obtain the boundary power of the power system, power battery and hydrogen stack of hydrogen fuel heavy trucks;

[0097] The processing module is used to take the minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power as the target power of the fuel cell system in the current state, and periodically output the target power of the fuel cell system in the current state to the fuel cell according to the minimum power change time allowed by the fuel cell system.

[0098] Example 3

[0099] This embodiment provides a hydrogen fuel heavy truck energy management system, including:

[0100] Memory, used to store computer programs / instructions;

[0101] A processor is used to execute the computer program / instructions to implement the steps of the hydrogen fuel heavy truck energy management method of embodiment 1 above.

[0102] Example 4

[0103] This embodiment provides a computer-readable storage medium having a computer program / instruction stored thereon. When the computer program / instruction is executed by a processor, the steps of the hydrogen fuel heavy truck energy management method of the above-mentioned embodiment 1 are implemented.

[0104] Example 5

[0105] This embodiment provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the hydrogen fuel heavy truck energy management method of the above-mentioned embodiment 1.

[0106] The present invention can determine the hydrogen stack request power based on the power battery SOC, with the optimization goals of slowing down or maintaining the battery temperature rise and reducing hydrogen consumption, and adjust the output power of the hydrogen stack within the load change frequency allowed by the hydrogen stack, thereby increasing the vehicle's endurance while taking into account the power performance.

[0107] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0108] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0111] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A hydrogen fuel heavy truck energy management method, characterized in that: include: Obtain the management strategy boundary power based on the current status of the hydrogen fuel heavy truck; Obtain the power system boundary power, power battery boundary power and fuel cell system boundary power of hydrogen fuel heavy trucks; The minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power is used as the target power of the fuel cell system in the current state, and according to the minimum power change time allowed by the fuel cell system, the target power of the fuel cell system in the current state is periodically output to the fuel cell.

2. The hydrogen fuel heavy truck energy management method according to claim 1, characterized in that: The step of obtaining the boundary power of the power system of the hydrogen fuel heavy truck specifically includes: Get the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state, Obtain the rated power of the hydrogen fuel heavy truck drive motor controller; The smaller of the maximum power of the drive motor and the rated power of the drive motor controller is taken as the boundary power of the power system of the hydrogen fuel heavy truck; Wherein: obtaining the maximum power of the driving motor of the hydrogen fuel heavy truck in the current state specifically includes: When the vehicle is in no-load mode, the maximum power of the drive motor in the current state is set to 50% of the peak power of the hydrogen fuel heavy truck drive motor; When the vehicle is in medium load mode, the maximum power of the drive motor in the current state is set to 70% of the peak power of the hydrogen fuel heavy truck drive motor; When the vehicle is in heavy-load mode, the maximum power of the drive motor in the current state is set to 100% of the peak power of the hydrogen fuel heavy-duty truck drive motor.

3. The hydrogen fuel heavy truck energy management method according to claim 1, characterized in that: The method for obtaining the power battery boundary power specifically includes: When I |DC| +I DCF ≥I Rmax When the brake pedal is ineffective for a period of time exceeding the first preset time, the power battery boundary power is ; Among them, I |DC| The DC / DC converter output current used by the current hydrogen stack fuel cell, I DCF is the DCF output current of the fuel cell system, I Rmax The maximum pulse recharge current allowed for the power battery, is the idle power of the fuel cell system; otherwise, ; Wherein, U is the power battery voltage, and the first preset time is half of the recharge over-limit level 1 fault diagnosis time reported by the power battery.

4. The hydrogen fuel heavy truck energy management method according to claim 1, characterized in that: The fuel cell system boundary power is the allowable load power of the fuel cell system.

5. The hydrogen fuel heavy truck energy management method according to claim 1, characterized in that: The method of obtaining the management strategy boundary power according to the current state of the hydrogen fuel heavy truck specifically includes: When I |DC| ≥I max +I DCF If the duration of this state is longer than the second preset time, the management strategy boundary power is P 动力 , the expression is: ； Among them, I |DC| is the absolute value of the actual motor DC bus current, I max The maximum continuous discharge current allowed by the battery, I DCF is the DCF output current of the fuel cell system, and SOC is the percentage of the current power of the power battery to the rated capacity. is the fuel cell system peak power; When I |DC| ≥I max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is: ； in: is the idle power of the fuel cell system; When I |DC| max +I DCF When the duration of this state is less than the second preset time, the management strategy boundary power is P 经济 , the expression is:​ ； in: is the idle power of the hydrogen stack.

6. A hydrogen fuel heavy truck energy management device, characterized in that: include: Boundary module, used to obtain the boundary power of the power system, power battery and hydrogen stack of hydrogen fuel heavy trucks; The processing module is used to take the minimum value among the power system boundary power, power battery boundary power, fuel cell system boundary power and management strategy boundary power as the target power of the fuel cell system in the current state, and periodically output the target power of the fuel cell system in the current state to the fuel cell according to the minimum power change time allowed by the fuel cell system.

7. A hydrogen fuel heavy truck energy management system, characterized in that: include: Memory, used to store computer programs / instructions; A processor is used to execute the computer program / instructions to implement the steps of the hydrogen fuel heavy truck energy management method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the hydrogen fuel heavy truck energy management method described in any one of claims 1 to 5 are implemented.

9. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the hydrogen fuel heavy truck energy management method according to any one of claims 1 to 5 are implemented.

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