Energy distribution method and device of hydrogen fuel cell under whole vehicle climbing working condition

Abstract

The invention discloses an energy distribution method and device under a whole vehicle climbing working condition of a hydrogen fuel cell in the technical field of hydrogen fuel cell vehicles, and aims to solve the problems that in the prior art, reasonable power distribution cannot be carried out according to different climbing working conditions, and the output power of a power battery system is limited due to the fact that the temperature of a power battery rises too fast; and the power performance of the whole vehicle is insufficient. The method comprises the steps of calculating vehicle demand power; judging whether the climbing time of the whole vehicle is greater than the pulse current time of the power battery system or not, and obtaining the working mode of the whole vehicle to determine a distribution category; and executing an allocation strategy corresponding to the allocation category to complete energy management. According to the method, different climbing working conditions are divided into different distribution categories, and corresponding distribution strategies are executed, so that reasonable power distribution is performed on the hydrogen fuel cell system and the power cell system under different climbing working conditions, and the situation that the output power of the power cell system is limited due to the fact that the temperature of the power cell rises too fast is prevented; and the service life of the system is ensured.

Description

Technical Field

[0001] The invention relates to an energy distribution method and device for a hydrogen fuel cell vehicle under a climbing condition, belonging to the technical field of hydrogen fuel cell vehicles. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis, supplying hydrogen and oxygen to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load. As a truly "zero-emission, pollution-free" means of transportation, hydrogen fuel cell vehicles are one of the main development directions of new energy clean power vehicles in the future. 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.

[0003] The existing hydrogen fuel cell system has a low power output and cannot achieve a significant power increase in a short period of time. The vehicle cannot reasonably allocate power for different climbing conditions. After the power battery system discharges a large current pulse, the power battery heats up too quickly, thereby limiting the output power of the power battery system. The vehicle's power is insufficient, affecting the driving experience, and also affecting the service life of the hydrogen fuel cell system and the power battery system. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an energy distribution method and device for a hydrogen fuel cell vehicle under climbing conditions, so as to ensure the efficiency of the hydrogen fuel cell while performing power distribution, to boost the power of the hydrogen fuel cell system in advance, to reduce the output of the power battery system, to prevent the power battery from heating up too quickly and thus to limit the output power of the power battery system, to ensure the power of the whole vehicle while ensuring the service life of the hydrogen fuel cell system and the power battery system.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides an energy distribution method for a hydrogen fuel cell vehicle under a climbing condition, comprising the following steps:

[0007] Obtaining the road slope information of the vehicle on the uphill section ahead, and calculating the required power of the vehicle according to the road slope information;

[0008] Obtain the whole vehicle climbing time and the whole vehicle working mode, determine whether the whole vehicle climbing time is greater than the power battery system pulse current time, and determine the allocation category according to the judgment result and the whole vehicle working mode;

[0009] An energy allocation strategy is determined according to the allocation category and the required power of the entire vehicle.

[0010] Furthermore, the calculating the vehicle required power according to the road slope information specifically includes:

[0011] The road slope information includes the road slope;

[0012] From the vehicle longitudinal dynamics driving equation:

[0013]

[0014]

[0015] Where: For driving force; is the rolling resistance; is the slope resistance; is air resistance; For acceleration resistance; is the motor torque; is the transmission ratio; is the transmission ratio of the main reducer; Transmission efficiency of automobile transmission system; is the tire rolling radius; The overall quality of the vehicle; is the acceleration due to gravity; is the friction resistance coefficient; is the road slope; is the windward area; is the air resistance coefficient; is the air density; is the vehicle climbing speed; t is the time; is the vehicle rotation mass conversion factor; is the driving acceleration;

[0016] At this time, the expression of the vehicle's required power is as follows:

[0017]

[0018] Where: P is the required power of the vehicle; n is the motor speed.

[0019] Further, determining the allocation category according to the judgment result and the working mode specifically includes:

[0020] If the judgment result is yes, and the working mode is not pure electric mode, the allocation category is the first category allocation;

[0021] If the judgment result is yes, and the working mode is pure electric mode, the allocation category is the second type of allocation;

[0022] If the judgment result is no, and the working mode is not pure electric mode, the allocation category is the third category allocation;

[0023] If the judgment result is no, and the working mode is pure electric mode, the allocation category is the fourth category allocation;

[0024] Among them, the non-pure electric mode includes a hydrogen-electric hybrid mode or a hydrogen fuel cell system single driving mode, and the pure electric mode is a power battery system single driving mode.

[0025] Furthermore, obtaining an allocation strategy according to the allocation category and the vehicle required power specifically includes:

[0026] When the allocation category is the first type of allocation, the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system and the maximum power of the vehicle; the maximum power of the vehicle = the maximum power of the hydrogen fuel cell system + the maximum power of the power battery system;

[0027] If the vehicle power requirement is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone will provide power for the vehicle, and the power of the power battery system will be zero. The expression is as follows:

[0028]

[0029] Where: It is the climbing time of the whole vehicle; is the length of the ramp; The maximum pulse current discharge time of the power battery; Ramp demand power for hydrogen fuel cell systems; is the maximum power of the hydrogen fuel cell system; is the power of the power battery system;

[0030] If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system will jointly provide power for the vehicle. The expression is as follows:

[0031]

[0032] Where: is the rated voltage of the power battery; is the power battery discharge current; is the maximum discharge pulse current; is the maximum power of the power battery system;

[0033] After the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system and the vehicle's maximum power, the distance between the vehicle and the uphill section ahead and the vehicle's speed are obtained, and the time it takes for the vehicle to reach the uphill section ahead is calculated. The expression is as follows:

[0034]

[0035] Where: is the time it takes for the vehicle to reach the uphill section ahead, is the distance between the vehicle and the uphill section ahead, and v is the vehicle speed;

[0036] Get the current hydrogen fuel cell system power and calculate the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp required power. The expression is as follows:

[0037]

[0038] Where: The time required to load the hydrogen fuel cell system to the hydrogen fuel cell system ramp demand power; is the current hydrogen fuel cell system power; It is the power value of hydrogen fuel cell system;

[0039] The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

[0040] Furthermore, obtaining an allocation strategy according to the allocation category and the vehicle required power specifically includes:

[0041] When the allocation category is the second type of allocation, the hydrogen fuel cell system is started, the startup time of the hydrogen fuel cell system is obtained, and the startup distance is calculated. The expression is as follows:

[0042]

[0043] Where: is the starting distance, The startup time of the hydrogen fuel cell system;

[0044] The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the first type of allocation is executed.

[0045] Furthermore, obtaining an allocation strategy according to the allocation category and the vehicle required power specifically includes:

[0046] When the allocation category is the third type of allocation, the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle;

[0047] Among them, if the maximum power of the hydrogen fuel cell system is greater than the maximum power of the power battery system, specifically including:

[0048] If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows:

[0049]

[0050] If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows:

[0051]

[0052] Among them, if the maximum power of the hydrogen fuel cell system is not greater than the maximum power of the power battery system, specifically including:

[0053] If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows:

[0054]

[0055] If the vehicle power requirement is greater than the maximum power of the hydrogen fuel cell system and not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows;

[0056]

[0057] Where: is the idling power of the hydrogen fuel cell system;

[0058] If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows:

[0059]

[0060] After the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle, the current hydrogen fuel cell system power is obtained, and the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp demand power is calculated. The expression is as follows:

[0061]

[0062] The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

[0063] Furthermore, obtaining an allocation strategy according to the allocation category and the vehicle required power specifically includes:

[0064] When the allocation category is the fourth type of allocation, the vehicle demand power is compared with the maximum power of the power battery system and the maximum power of the vehicle;

[0065] If the vehicle power requirement is not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows;

[0066]

[0067] If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle, start the hydrogen fuel cell system, obtain the hydrogen fuel cell system startup time, and calculate the startup distance. The expression is as follows:

[0068]

[0069] The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the third type of allocation is executed.

[0070] In a second aspect, the present invention provides an energy management device for a hydrogen fuel cell vehicle under a climbing condition, comprising:

[0071] Calculation module: used to obtain the road slope information of the vehicle on the uphill section ahead, and calculate the required power of the vehicle according to the road slope information;

[0072] Classification module: used to obtain the climbing time and working mode of the whole vehicle, determine whether the climbing time of the whole vehicle is greater than the pulse current time of the power battery system, and determine the allocation category according to the judgment result and the working mode of the whole vehicle;

[0073] Execution module: used to determine the energy allocation strategy according to the allocation category and the required power of the whole vehicle.

[0074] In a third aspect, the present invention provides a terminal, including a processor and a storage medium;

[0075] The storage medium is used to store instructions;

[0076] The processor is used to operate according to the instructions to execute the steps of the method according to the first aspect.

[0077] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the method described in the first aspect.

[0078] Compared with the prior art, the present invention has the following beneficial effects:

[0079] The energy distribution method for the hydrogen fuel cell vehicle under the climbing condition obtains the required power of the vehicle, and then divides different climbing conditions into different distribution categories according to the climbing time of the vehicle and the working mode of the vehicle, and executes corresponding distribution strategies, so as to reasonably distribute power to the hydrogen fuel cell system and the power battery system under different climbing conditions, prevent the power battery from heating up too quickly and thus limit the output power of the power battery system, ensure the driving experience of the personnel, and at the same time ensure the service life of the hydrogen fuel cell system and the power battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 It is a flow chart of an energy distribution method for a hydrogen fuel cell vehicle under a climbing condition provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0081] 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. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0082] Embodiment 1:

[0083] like Figure 1 As shown, the present invention provides an energy distribution method for a hydrogen fuel cell vehicle under a climbing condition, comprising the following steps:

[0084] Obtaining the road slope information of the vehicle on the uphill section ahead, and calculating the required power of the vehicle according to the road slope information;

[0085] Obtain the whole vehicle climbing time and the whole vehicle working mode, determine whether the whole vehicle climbing time is greater than the power battery system pulse current time, and determine the allocation category according to the judgment result and the whole vehicle working mode;

[0086] An energy allocation strategy is determined according to the allocation category and the required power of the entire vehicle.

[0087] Specifically, the present application obtains the road slope information of the whole vehicle on the uphill section ahead through the predictive cruise system. The whole vehicle controller of the present invention obtains the whole vehicle power required for the whole vehicle on the uphill section ahead based on map data, radar data, the driver's driving intention, etc.; at the same time, the power system of the whole vehicle will be matched and calculated during the development stage of the vehicle, and the whole vehicle power will reserve reserve power according to the operating conditions, so as to avoid the whole vehicle demand power being greater than the whole vehicle maximum power, so as to ensure the stability of the vehicle during movement.

[0088] In one embodiment, the calculating the vehicle required power according to the road slope information specifically includes:

[0089] The road slope information includes the road slope;

[0090] The expression of the vehicle longitudinal dynamics driving equation is as follows:

[0091]

[0092] in, = ; = ; = ; = ; = ;

[0093] From the vehicle longitudinal dynamics driving equation:

[0094]

[0095]

[0096] Where: For driving force; is the rolling resistance; is the slope resistance; is air resistance; For acceleration resistance; is the motor torque; is the transmission ratio; is the transmission ratio of the main reducer; Transmission efficiency of automobile transmission system; is the tire rolling radius; The overall quality of the vehicle; is the acceleration due to gravity; is the friction resistance coefficient; is the road slope; is the windward area; is the air resistance coefficient; is the air density; is the vehicle climbing speed; t is the time; is the vehicle rotation mass conversion factor; is the driving acceleration;

[0097] At this time, the expression of the vehicle's required power is as follows:

[0098]

[0099] Where: P is the required power of the vehicle; n is the motor speed.

[0100] In one embodiment, determining the allocation category according to the judgment result and the working mode specifically includes:

[0101] If the judgment result is yes, and the working mode is not pure electric mode, the allocation category is the first category allocation;

[0102] If the judgment result is yes, and the working mode is pure electric mode, the allocation category is the second type of allocation;

[0103] If the judgment result is no, and the working mode is not pure electric mode, the allocation category is the third category allocation;

[0104] If the judgment result is no, and the working mode is pure electric mode, the allocation category is the fourth category allocation;

[0105] Among them, the non-pure electric mode includes a hydrogen-electric hybrid mode or a hydrogen fuel cell system single driving mode, and the pure electric mode is a power battery system single driving mode.

[0106] In one embodiment, obtaining the allocation strategy according to the allocation category and the vehicle required power specifically includes:

[0107] When the allocation category is the first type of allocation, the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system and the maximum power of the vehicle; the maximum power of the vehicle = the maximum power of the hydrogen fuel cell system + the maximum power of the power battery system; that is, the maximum power of the vehicle = ;

[0108] If the vehicle power requirement is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone will provide power for the vehicle, and the power of the power battery system will be zero. The expression is as follows:

[0109]

[0110] Where: It is the climbing time of the whole vehicle; is the length of the ramp; The maximum pulse current discharge time of the power battery; Ramp demand power for hydrogen fuel cell systems; is the maximum power of the hydrogen fuel cell system; is the power of the power battery system;

[0111] If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system will jointly provide power for the vehicle. The expression is as follows:

[0112]

[0113] Where: is the rated voltage of the power battery; is the power battery discharge current; is the maximum discharge pulse current; is the maximum power of the power battery system;

[0114] After the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system and the vehicle's maximum power, the distance between the vehicle and the uphill section ahead and the vehicle's speed are obtained, and the time it takes for the vehicle to reach the uphill section ahead is calculated. The expression is as follows:

[0115]

[0116] Where: is the time it takes for the vehicle to reach the uphill section ahead, is the distance between the vehicle and the uphill section ahead, and v is the vehicle speed;

[0117] Get the current hydrogen fuel cell system power and calculate the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp required power. The expression is as follows:

[0118]

[0119] Where: The time required to load the hydrogen fuel cell system to the hydrogen fuel cell system ramp demand power; is the current hydrogen fuel cell system power; It is the power value of hydrogen fuel cell system;

[0120] The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

[0121] Specifically, when the time required for the hydrogen fuel cell system to be loaded to the power required on the ramp of the hydrogen fuel cell system meets the requirement, the hydrogen fuel cell system is controlled to increase the power; if the current hydrogen fuel cell system power is not less than the power required on the ramp of the hydrogen fuel cell system, that is, the time required for the hydrogen fuel cell system to be loaded to the power required on the ramp of the hydrogen fuel cell system is not greater than zero, the time required for the hydrogen fuel cell system to be loaded to the power required on the ramp of the hydrogen fuel cell system is set to zero, that is, the hydrogen fuel cell system does not increase the power; optionally, the entire vehicle is in a straight driving state before climbing the slope, so the current hydrogen fuel cell system power must be less than the power required on the ramp of the hydrogen fuel cell system.

[0122] In an embodiment, obtaining the allocation strategy according to the allocation category and the vehicle required power specifically further includes:

[0123] When the allocation category is the second type of allocation, the hydrogen fuel cell system is started, the startup time of the hydrogen fuel cell system is obtained, and the startup distance is calculated. The expression is as follows:

[0124]

[0125] Where: is the starting distance, The startup time of the hydrogen fuel cell system;

[0126] The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the first type of allocation is executed.

[0127] Specifically, since the startup time of the hydrogen fuel cell system is relatively long, the controller should issue a command to start the hydrogen fuel cell system when the vehicle is at the starting distance from the ramp; after the hydrogen fuel cell system is started, the power allocated to the power battery system operates according to the allocation strategy corresponding to the first type of allocation.

[0128] In an embodiment, obtaining the allocation strategy according to the allocation category and the vehicle required power specifically further includes:

[0129] When the allocation category is the third type of allocation, the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle;

[0130] Among them, if the maximum power of the hydrogen fuel cell system is greater than the maximum power of the power battery system, specifically including:

[0131] If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows:

[0132]

[0133] If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows:

[0134]

[0135] Among them, if the maximum power of the hydrogen fuel cell system is not greater than the maximum power of the power battery system, specifically including:

[0136] If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows:

[0137]

[0138] If the vehicle power requirement is greater than the maximum power of the hydrogen fuel cell system and not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows;

[0139]

[0140] Where: is the idling power of the hydrogen fuel cell system;

[0141] If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows:

[0142]

[0143] After the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle, the current hydrogen fuel cell system power is obtained, and the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp demand power is calculated. The expression is as follows:

[0144]

[0145] The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

[0146] In an embodiment, obtaining the allocation strategy according to the allocation category and the vehicle required power specifically further includes:

[0147] When the allocation category is the fourth type of allocation, the vehicle demand power is compared with the maximum power of the power battery system and the maximum power of the vehicle;

[0148] If the vehicle power requirement is not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows;

[0149]

[0150] If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle, start the hydrogen fuel cell system, obtain the hydrogen fuel cell system startup time, and calculate the startup distance. The expression is as follows:

[0151]

[0152] The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the third type of allocation is executed.

[0153] Specifically, since the startup time of the hydrogen fuel cell system is relatively long, the controller should issue a command to start the hydrogen fuel cell system when the vehicle is at the starting distance from the ramp; after the hydrogen fuel cell system is started, the power allocated to the power battery system operates according to the allocation strategy corresponding to the third type of allocation.

[0154] The present invention obtains the power demand of the whole vehicle, and then divides different climbing conditions into different allocation categories according to the climbing time of the whole vehicle and the working mode of the whole vehicle, and executes the allocation strategy corresponding to the allocation category, so as to reasonably allocate power to the hydrogen fuel cell system and the power battery system under different climbing conditions, prevent the power battery from heating up too quickly and thus limit the output power of the power battery system, ensure the driving experience of the personnel, and at the same time ensure the service life of the hydrogen fuel cell system and the power battery system.

[0155] The present invention calculates the required power of the whole vehicle according to the road slope information before the whole vehicle goes uphill, and increases the power of the fuel cell system in advance according to the power increase value of the fuel cell system and the time when the whole vehicle travels to the uphill section ahead, distributes the power of the hydrogen fuel cell system and the power battery system, and distributes the power while ensuring the efficiency of the hydrogen fuel cell, thereby increasing the power of the hydrogen fuel cell system in advance, reducing the output of the power battery system, preventing the power battery from heating up too quickly and thus limiting the output power of the power battery system, ensuring the power of the whole vehicle while ensuring the life of the hydrogen fuel cell system and the power battery system.

[0156] Embodiment 2:

[0157] The present invention provides an energy management device for a hydrogen fuel cell vehicle under a climbing condition, comprising:

[0158] Calculation module: used to obtain the road slope information of the vehicle on the uphill section ahead, and calculate the required power of the vehicle according to the road slope information;

[0159] Classification module: used to obtain the climbing time and working mode of the whole vehicle, determine whether the climbing time of the whole vehicle is greater than the pulse current time of the power battery system, and determine the allocation category according to the judgment result and the working mode of the whole vehicle;

[0160] Execution module: used to determine the energy allocation strategy according to the allocation category and the required power of the whole vehicle.

[0161] Embodiment three:

[0162] An embodiment of the present invention further provides a terminal, including a processor and a storage medium;

[0163] The storage medium is used to store instructions;

[0164] The processor is used to operate according to the instructions to execute the steps of the method described in embodiment 1.

[0165] Embodiment 4:

[0166] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the first embodiment are implemented.

[0167] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0168] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, 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 generate 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 flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0169] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate 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 A function specified in one or more boxes.

[0170] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0171] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for distributing energy for a hydrogen fuel cell vehicle under hill climbing conditions, characterized in that: The following steps are involved: Obtaining the road slope information of the vehicle on the uphill section ahead, and calculating the required power of the vehicle according to the road slope information; Obtain the whole vehicle climbing time and the whole vehicle working mode, determine whether the whole vehicle climbing time is greater than the power battery system pulse current time, and determine the allocation category according to the judgment result and the whole vehicle working mode; An energy allocation strategy is determined according to the allocation category and the required power of the entire vehicle.

2. The energy distribution method for a hydrogen fuel cell vehicle under a hill climbing condition according to claim 1, characterized in that: The calculating the vehicle required power according to the road slope information specifically includes: The road slope information includes the road slope; From the vehicle longitudinal dynamics equation: Where: For driving force; is the rolling resistance; is the slope resistance; is air resistance; For acceleration resistance; is the motor torque; is the transmission ratio; is the transmission ratio of the main reducer; Transmission efficiency of automobile transmission system; is the tire rolling radius; The overall quality of the vehicle; is the acceleration due to gravity; is the friction resistance coefficient; is the road slope; is the windward area; is the air resistance coefficient; is the air density; is the vehicle climbing speed; t is the time; is the vehicle rotation mass conversion factor; is the driving acceleration; At this time, the expression of the vehicle's required power is as follows: Where: P is the required power of the vehicle; n is the motor speed.

3. The energy distribution method for a hydrogen fuel cell vehicle under a climbing condition according to claim 2 is characterized in that: Determining the allocation category according to the judgment result and the working mode specifically includes: If the judgment result is yes, and the working mode is not pure electric mode, the allocation category is the first category allocation; If the judgment result is yes, and the working mode is pure electric mode, the allocation category is the second type of allocation; If the judgment result is no, and the working mode is not pure electric mode, the allocation category is the third category allocation; If the judgment result is no, and the working mode is pure electric mode, the allocation category is the fourth category allocation; Among them, the non-pure electric mode includes a hydrogen-electric hybrid mode or a hydrogen fuel cell system single driving mode, and the pure electric mode is a power battery system single driving mode.

4. The energy distribution method for a hydrogen fuel cell vehicle under a hill climbing condition according to claim 3 is characterized in that: The obtaining of the allocation strategy according to the allocation category and the vehicle required power specifically includes: When the allocation category is the first type of allocation, the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system and the maximum power of the vehicle; the maximum power of the vehicle = the maximum power of the hydrogen fuel cell system + the maximum power of the power battery system; If the vehicle power requirement is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone will provide power for the vehicle, and the power of the power battery system will be zero. The expression is as follows: Where: It is the climbing time of the whole vehicle; is the length of the ramp; The maximum pulse current discharge time of the power battery; Ramp demand power for hydrogen fuel cell systems; is the maximum power of the hydrogen fuel cell system; is the power of the power battery system; If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system will jointly provide power for the vehicle. The expression is as follows: Where: is the rated voltage of the power battery; is the power battery discharge current; is the maximum discharge pulse current; is the maximum power of the power battery system; After the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system and the vehicle's maximum power, the distance between the vehicle and the uphill section ahead and the vehicle's speed are obtained, and the time it takes for the vehicle to reach the uphill section ahead is calculated. The expression is as follows: Where: is the time it takes for the vehicle to reach the uphill section ahead, is the distance between the vehicle and the uphill section ahead, and v is the vehicle speed; Get the current hydrogen fuel cell system power and calculate the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp required power. The expression is as follows: Where: The time required to load the hydrogen fuel cell system to the hydrogen fuel cell system ramp demand power; is the current hydrogen fuel cell system power; It is the power value of hydrogen fuel cell system; The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

5. The energy distribution method for a hydrogen fuel cell vehicle under a hill climbing condition according to claim 4, characterized in that: The obtaining of the allocation strategy according to the allocation category and the vehicle required power specifically includes: When the allocation category is the second type of allocation, the hydrogen fuel cell system is started, the startup time of the hydrogen fuel cell system is obtained, and the startup distance is calculated. The expression is as follows: Where: is the starting distance, The startup time of the hydrogen fuel cell system; The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the first type of allocation is executed.

6. The energy distribution method for a hydrogen fuel cell vehicle under a climbing condition according to claim 5, characterized in that: The obtaining of the allocation strategy according to the allocation category and the vehicle required power specifically includes: When the allocation category is the third type of allocation, the vehicle's required power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle; Among them, if the maximum power of the hydrogen fuel cell system is greater than the maximum power of the power battery system, specifically including: If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows: If the vehicle's required power is greater than the maximum power of the hydrogen fuel cell system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows: Among them, if the maximum power of the hydrogen fuel cell system is not greater than the maximum power of the power battery system, specifically including: If the vehicle's required power is not greater than the maximum power of the hydrogen fuel cell system, the hydrogen fuel cell system alone provides power for the vehicle, and the power of the power battery system is zero. The expression is as follows: If the vehicle power requirement is greater than the maximum power of the hydrogen fuel cell system and not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows; Where: is the idling power of the hydrogen fuel cell system; If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle. The expression is as follows: After the vehicle demand power is compared with the maximum power of the hydrogen fuel cell system, the maximum power of the power battery system, and the maximum power of the vehicle, the current hydrogen fuel cell system power is obtained, and the time required for the hydrogen fuel cell system to load to the hydrogen fuel cell system ramp demand power is calculated. The expression is as follows: The hydrogen fuel cell system and the power battery system are controlled according to the ramp power requirement of the hydrogen fuel cell system, the power of the power battery system and the time required for the hydrogen fuel cell system to be loaded to the ramp power requirement of the hydrogen fuel cell system.

7. The energy distribution method for a hydrogen fuel cell vehicle under a hill climbing condition according to claim 6, characterized in that: The obtaining of the allocation strategy according to the allocation category and the vehicle required power specifically includes: When the allocation category is the fourth type of allocation, the vehicle demand power is compared with the maximum power of the power battery system and the maximum power of the vehicle; If the vehicle power requirement is not greater than the maximum power of the power battery system, the power battery system alone will provide power for the vehicle. The ramp power requirement of the hydrogen fuel cell system is the idle power, expressed as follows; If the vehicle's required power is greater than the maximum power of the power battery system but not greater than the vehicle's maximum power, the hydrogen fuel cell system and the power battery system jointly provide power for the vehicle, start the hydrogen fuel cell system, obtain the hydrogen fuel cell system startup time, and calculate the startup distance. The expression is as follows: The start-up of the hydrogen fuel cell system is controlled according to the start-up distance. After the hydrogen fuel cell system is started, the allocation strategy corresponding to the third type of allocation is executed.

8. An energy management device for a hydrogen fuel cell vehicle in a climbing condition, characterized in that: include: Calculation module: used to obtain the road slope information of the vehicle on the uphill section ahead, and calculate the required power of the vehicle according to the road slope information; Classification module: used to obtain the climbing time and working mode of the whole vehicle, determine whether the climbing time of the whole vehicle is greater than the pulse current time of the power battery system, and determine the allocation category according to the judgment result and the working mode of the whole vehicle; Execution module: used to determine the energy allocation strategy according to the allocation category and the required power of the whole vehicle.

9. A terminal, characterized in that: including processor and storage medium; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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