Hydrogen storage device collision control system and vehicle

Abstract

This disclosure relates to a collision control system for a hydrogen storage device and a vehicle. An energy-absorbing device is installed on the outside of the hydrogen storage device, and the device contains hydraulic oil. The energy-absorbing device is connected to a hydraulic oil tank. In the event of a collision, the energy-absorbing device absorbs collision energy and discharges the hydraulic oil to the hydraulic oil tank, thereby releasing the collision energy and reducing the collision force on the hydrogen storage device. Simultaneously, the controller can determine the degree of collision experienced by the energy-absorbing device based on the hydraulic oil level in the hydraulic oil tank, and then determine a collision control strategy. The controller then controls the vehicle according to the collision control strategy, thereby improving the safety of the vehicle's hydrogen system.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle control technology, and more specifically, to a collision control system for a hydrogen storage device and a vehicle. Background Technology

[0002] Currently, whether driving or parked, hydrogen fuel cell vehicles are highly susceptible to accidents if a collision occurs, which can easily cause valve failure or poor pipeline connections, leading to hydrogen storage system leaks and causing hydrogen safety incidents.

[0003] In related technologies, the safety of a hydrogen system is detected and controlled by using hydrogen concentration sensors and hydrogen controllers arranged on the hydrogen supply system. This method has a relatively simple structure but low safety. Summary of the Invention

[0004] The purpose of this disclosure is to provide a collision control system for a hydrogen storage device and a vehicle. An energy-absorbing device is installed on the outside of the hydrogen storage device, and the device contains hydraulic oil. The energy-absorbing device is connected to a hydraulic oil tank. In the event of a collision, the energy-absorbing device absorbs collision energy and discharges the hydraulic oil to the hydraulic oil tank, thereby releasing the collision energy and reducing the collision force on the hydrogen storage device. Simultaneously, the controller can determine the degree of collision experienced by the energy-absorbing device based on the hydraulic oil level in the hydraulic oil tank, and then determine a collision control strategy. The controller then controls the vehicle according to the collision control strategy, thereby improving the safety of the vehicle's hydrogen system.

[0005] To achieve the above objectives, according to a first aspect of this disclosure, a collision control system for a hydrogen storage device is provided, comprising:

[0006] Hydraulic oil tank 1;

[0007] Energy absorption device 2 is located outside hydrogen storage device 4 and is connected to hydraulic oil tank 1. It is filled with hydraulic oil and is used to absorb collision energy when a collision occurs and discharge the hydraulic oil to hydraulic oil tank 1.

[0008] The controller is configured to determine a collision control strategy based on the hydraulic oil level in the hydraulic oil tank 1, and control the vehicle according to the collision control strategy.

[0009] Optionally, the controller is configured to: when the hydraulic oil level in the hydraulic oil tank 1 is greater than a first level threshold and less than or equal to a second level threshold, control the vehicle to output collision warning information, the collision warning information being used to prompt the user to check the vehicle condition.

[0010] Optionally, the controller is configured to: when the hydraulic oil level in the hydraulic oil tank 1 is greater than a second level threshold, control the vehicle to output a collision alarm message, the collision alarm message being used to prompt the user to stop and check the vehicle's condition.

[0011] Optionally, the system further includes a hydrogen concentration sensor configured to detect hydrogen leakage.

[0012] The controller is configured to: when the hydraulic oil level in the hydraulic oil tank 1 is greater than a second level threshold, determine a collision control strategy based on the hydraulic oil level and the hydrogen leakage value, and control the vehicle according to the collision control strategy.

[0013] Optionally, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is less than or equal to a first hydrogen threshold, control the vehicle to output collision alarm information, the collision alarm information being used to prompt the user to stop and check the vehicle's condition.

[0014] Optionally, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a first hydrogen threshold but less than a second hydrogen threshold, control the vehicle to output a collision alarm message and control the vehicle to close the hydrogen valve, wherein the collision alarm message is used to prompt the user to stop and check the vehicle condition.

[0015] Optionally, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a second hydrogen threshold, control the vehicle to output a severe collision alarm message, control the fuel cell controller to shut down, and control the vehicle to close the hydrogen valve. The severe collision alarm message is used to prompt the user to stop immediately and check the vehicle's condition.

[0016] Optionally, the controller is further configured to determine the second liquid level threshold based on the target collision parameters and the vehicle's operating parameters, wherein the target collision parameters characterize the target energy value absorbed by the energy absorption device 2.

[0017] Optionally, the vehicle's operating parameters include the vehicle's speed;

[0018] The controller is specifically configured as follows:

[0019] The target collision time is determined based on the vehicle's speed.

[0020] The allowable hydraulic oil discharge volume is determined based on the cross-sectional area of ​​the drain hole, the target collision time, and the target collision parameters.

[0021] The target hydraulic oil level is determined based on the allowable hydraulic oil discharge volume and the bottom area of ​​the hydraulic oil tank 1.

[0022] The second level threshold is obtained based on the target hydraulic oil change level and the original hydraulic oil level.

[0023] According to a second aspect of this disclosure, a vehicle is provided, including a hydrogen storage device 4 and a collision control system provided in the first aspect.

[0024] Through the above technical solution, an energy-absorbing device 2 is installed on the outside of the hydrogen storage device 4, and the energy-absorbing device 2 is filled with hydraulic oil. The energy-absorbing device 2 is connected to the hydraulic oil tank 1. The energy-absorbing device 2 is used to absorb collision energy in the event of a collision and discharge the hydraulic oil to the hydraulic oil tank 1, thereby releasing the collision energy and reducing the collision force on the hydrogen storage device 4. At the same time, the controller can determine the degree of collision suffered by the energy-absorbing device 2 based on the hydraulic oil level in the hydraulic oil tank 1, and then determine different collision control strategies based on different collision degrees, and control the vehicle according to the collision control strategies, thereby improving the safety of the vehicle's hydrogen system.

[0025] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of a collision control system for a hydrogen storage device provided according to one embodiment of the present disclosure.

[0028] Figure 2 This is a schematic diagram of an energy-absorbing device provided according to one embodiment of the present disclosure.

[0029] Figure 3 This is a schematic diagram of a vehicle control strategy provided according to one embodiment of the present disclosure.

[0030] Figure 4 This is a schematic diagram of a vehicle provided according to one embodiment of the present disclosure.

[0031] Explanation of reference numerals in the attached figures

[0032] 1. Hydraulic oil tank; 2. Energy absorption device; 3. Liquid level sensor; 4. Hydrogen storage device; 5. Chassis. Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and should not be construed as referring to a specific order or sequence. Furthermore, in the description of the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0035] Currently, whether driving or parked, hydrogen fuel cell vehicles are highly susceptible to accidents if a collision occurs, which can easily cause valve failure or poor pipeline connections, leading to hydrogen storage system leaks and causing hydrogen safety incidents.

[0036] In related technologies, the safety of a hydrogen system is detected and controlled by using hydrogen concentration sensors and hydrogen controllers arranged on the hydrogen supply system. This method has a relatively simple structure but low safety.

[0037] To address the aforementioned technical problems, this disclosure provides a collision control system for a hydrogen storage device and a vehicle. An energy-absorbing device is installed on the outside of the hydrogen storage device, and the device contains hydraulic oil. The energy-absorbing device is connected to a hydraulic oil tank. In the event of a collision, the energy-absorbing device absorbs collision energy and discharges the hydraulic oil to the hydraulic oil tank, thereby releasing the collision energy and reducing the collision force on the hydrogen storage device. Simultaneously, the controller can determine the degree of collision experienced by the energy-absorbing device based on the hydraulic oil level in the hydraulic oil tank, and then determine a collision control strategy. The controller then controls the vehicle according to the collision control strategy, thereby improving the safety of the vehicle's hydrogen system.

[0038] Figure 1 This is a schematic diagram of a collision control system for a hydrogen storage device according to one embodiment of the present disclosure, such as... Figure 1 As shown, the collision control system of the hydrogen storage device includes: a hydraulic oil tank 1, an energy absorption device 2, and a controller.

[0039] Among them, the energy absorption device 2 is located outside the hydrogen storage device 4 and is connected to the hydraulic oil tank 1. It is filled with hydraulic oil and is used to absorb collision energy when a collision occurs and discharge the hydraulic oil to the hydraulic oil tank 1. The controller is configured to determine the collision control strategy based on the hydraulic oil level in the hydraulic oil tank 1 and control the vehicle according to the collision control strategy.

[0040] In this embodiment, the energy-absorbing device 2 can be disposed on the outside of the hydrogen storage device 4 to reduce the impact force on the hydrogen storage device 4. If the hydrogen storage device 4 is disposed on the side of the vehicle frame 5, the energy-absorbing device 2 can be disposed on the side of the hydrogen storage device 4 away from the frame 5, thereby protecting the hydrogen storage device 4. The energy-absorbing device 2 contains hydraulic oil and is connected to the hydraulic oil tank 1. Specifically, the energy-absorbing device 2 can be connected to the hydraulic oil tank 1 via a conduit, which can be a flexible hose. The top of the hydraulic oil tank 1 has an oil tank opening, and an oil tank cap is provided at the oil tank opening to facilitate the input or output of hydraulic oil.

[0041] Figure 2 This is a schematic diagram of an energy-absorbing device provided according to one embodiment of the present disclosure, such as... Figure 2 As shown, energy-absorbing devices 2 are respectively installed on the exterior of the hydrogen storage devices 4 on the left and right sides of the vehicle frame 5. The total oil storage volumes are V1 and V2, respectively. The energy-absorbing devices 2 are connected to the hydraulic oil tank 1 via connecting hoses. The total oil storage volume of the hydraulic oil tank 1 is V3. It can be filled through the tank cap or shared with other hydraulic oil tanks 1 in the vehicle. The hydraulic oil tank 1 has a level sensor 3 to monitor the changes in the hydraulic oil level in the hydraulic oil tank 1 in real time. Under normal circumstances, the energy-absorbing devices 2 are full of hydraulic oil, and the sum of V1 and V2 is required to be less than 1 / 2 of the volume of V3. The purpose is to prevent hydraulic oil from overflowing from the tank cap in the event of a collision. If one of the energy-absorbing devices 2 collides with another vehicle, the energy during the collision is converted into the kinetic energy of the liquid during leakage, thereby discharging the hydraulic oil into the hydraulic oil tank 1. This absorbs the collision energy and reduces the safety hazard of hydrogen leakage caused by the deformation of the hydrogen storage devices 4 due to the collision.

[0042] A level sensor 3 is installed in the hydraulic oil tank 1 to detect the hydraulic oil level. The controller can be connected to the level sensor 3 in the hydraulic oil tank 1 to obtain the hydraulic oil level in the tank in real time. During a collision, specifically when the energy-absorbing device 2 is impacted, it deforms and absorbs the collision energy, discharging hydraulic oil from the tank into the hydraulic oil tank 1, causing the hydraulic oil level in the tank to rise. Based on the hydraulic oil level in the tank, the controller can determine the degree of impact on the energy-absorbing device 2 and then determine different collision control strategies based on the degree of impact. Specifically, different collision control strategies can be determined based on the relationship between the hydraulic oil level and different level thresholds, and the vehicle can be controlled according to the collision control strategy to improve the safety of the vehicle's hydrogen system.

[0043] Figure 3 This is a schematic diagram of a vehicle control strategy provided according to one embodiment of the present disclosure, such as... Figure 3 As shown, in one possible implementation, the controller can be configured to:

[0044] When the hydraulic oil level in the hydraulic oil tank 1 is greater than the first level threshold and less than or equal to the second level threshold, the collision control strategy is determined to be the first control strategy, and the vehicle is controlled according to the first control strategy; when the hydraulic oil level in the hydraulic oil tank 1 is greater than the second level threshold, the collision control strategy is determined to be the second control strategy, and the vehicle is controlled according to the second control strategy.

[0045] In this embodiment, the corresponding control strategy can be determined based on the hydraulic oil level. The first level threshold can be the initial level of the hydraulic oil tank 1, i.e., the hydraulic oil level in the hydraulic oil tank 1 when the energy-absorbing device 2 has not been impacted. The second level threshold can be preset or determined based on the actual operating parameters of the vehicle, and is used to determine whether the collision severity has reached the target collision severity. If the hydraulic oil level is less than or equal to the first level threshold, it can be determined that the vehicle has not been impacted, and no vehicle inspection is required. If the hydraulic oil level is greater than the first level threshold and less than or equal to the second level threshold, it is determined that the energy-absorbing device 2 has been impacted, but the impact severity has not reached the target collision severity and does not affect the vehicle's driving safety. The collision control strategy is determined as the first control strategy, and the vehicle is controlled according to the first control strategy. If the hydraulic oil level in the hydraulic oil tank 1 is greater than the second level threshold, it is determined that the energy-absorbing device 2 has been impacted, and the impact severity has reached the target collision severity, affecting the vehicle's driving safety. The collision control strategy is determined as the second control strategy, and the vehicle is controlled according to the second control strategy.

[0046] In one possible implementation, the controller is configured to: when the hydraulic oil level in the hydraulic oil tank 1 is greater than a first level threshold and less than or equal to a second level threshold, control the vehicle to output collision warning information, which is used to prompt the user to check the vehicle condition.

[0047] In this embodiment, when the hydraulic oil level in the hydraulic oil tank 1 is greater than the first level threshold and less than or equal to the second level threshold, the collision suffered by the energy-absorbing device 2 does not reach the target collision level and will not affect the vehicle's driving safety. In this case, the collision control strategy can be determined as the first control strategy, that is, the controller can generate collision warning information and control the vehicle to output the collision warning information to the user so as to prompt the user to check the vehicle's condition. The user can check the vehicle at idle time. Specifically, the collision warning information can be displayed to the user through the vehicle's user interface as text or an icon, or it can be output as voice through a voice output device.

[0048] In one possible implementation, the controller is configured to: when the hydraulic oil level in the hydraulic oil tank 1 is greater than a second level threshold, control the vehicle to output a collision alarm message, the collision alarm message being used to prompt the user to stop and check the vehicle's condition.

[0049] In this embodiment, when the hydraulic oil level in the hydraulic oil tank 1 is higher than the second level threshold, the collision experienced by the energy-absorbing device 2 has reached the target collision level, which will affect the vehicle's driving safety. In this case, the collision control strategy can be determined as the second control strategy, that is, the controller can generate collision alarm information and control the vehicle to output the collision alarm information to the user, so as to prompt the user to stop and check the vehicle's condition. The user can stop at an appropriate location and check the vehicle. Specifically, the collision alarm information can be displayed to the user through the vehicle's user interface as text or an icon, or it can be output as voice through a voice output device.

[0050] In one possible implementation, the system also includes a hydrogen concentration sensor configured to detect hydrogen leakage.

[0051] The controller is configured to: determine a collision control strategy based on the hydraulic oil level and hydrogen leakage value when the hydraulic oil level in hydraulic oil tank 1 is greater than a second level threshold, and control the vehicle according to the collision control strategy.

[0052] In this embodiment, the hydrogen storage device collision control system also includes a hydrogen concentration sensor to detect hydrogen leakage values, thereby determining whether a hydrogen leak exists and the extent of the leak. The hydrogen concentration sensor can be connected to a controller, allowing the controller to acquire the hydrogen leakage value detected by the sensor. This enables real-time monitoring of the hydrogen leak and, when a collision of the target magnitude occurs (i.e., when the hydraulic oil level in hydraulic tank 1 exceeds a second level threshold), the controller can combine the hydraulic oil level and the hydrogen leakage value to refine the control strategy, resulting in a more accurate collision control strategy that better suits the user's actual situation. The vehicle is then controlled according to this collision control strategy to improve driving safety.

[0053] In one possible implementation, the control strategy includes a first sub-control strategy, a second sub-control strategy, and a third sub-control strategy, and the controller is configured to:

[0054] If the hydraulic oil level is greater than the second level threshold and the hydrogen leakage value is less than or equal to the first hydrogen threshold, the collision control strategy is determined as the first sub-control strategy, and the vehicle is controlled according to the first sub-control strategy. If the hydraulic oil level is greater than the second level threshold and the hydrogen leakage value is greater than the first hydrogen threshold but less than the second hydrogen threshold, the collision control strategy is determined as the second sub-control strategy, and the vehicle is controlled according to the second sub-control strategy. If the hydraulic oil level is greater than the second level threshold and the hydrogen leakage value is greater than the second hydrogen threshold, the collision control strategy is determined as the third sub-control strategy, and the vehicle is controlled according to the third sub-control strategy.

[0055] In this embodiment, when the hydraulic oil level is higher than the second level threshold, i.e., when a collision of the target collision magnitude occurs, hydrogen leakage from the hydrogen storage device 4 may occur. A more granular collision control strategy can be determined based on the hydrogen leakage value. The first hydrogen threshold is the lower limit of hydrogen concentration, and the second hydrogen threshold is the upper limit of hydrogen concentration. If the hydrogen leakage value is less than or equal to the first hydrogen threshold, it is determined that the hydrogen leakage is below the lower limit of hydrogen concentration, and the hydrogen leakage does not affect driving safety or the operation of the fuel cell; the vehicle is controlled through the first sub-control strategy. If the hydrogen leakage value is greater than the first hydrogen threshold but less than the second hydrogen threshold, the hydrogen leakage will affect driving safety and will affect the operation of the fuel cell to some extent; the vehicle is controlled through the second sub-control strategy. If the hydrogen leakage value is greater than the second hydrogen threshold, it seriously affects driving safety and the operation of the fuel cell; the vehicle is controlled through the third sub-control strategy. This more granular control strategy better meets the user's driving needs and improves vehicle driving safety.

[0056] In one possible implementation, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is less than or equal to a first hydrogen threshold, control the vehicle to output a collision alarm message, the collision alarm message being used to prompt the user to stop and check the vehicle's condition.

[0057] In this embodiment, when the hydraulic oil level is greater than the second level threshold and the hydrogen leakage value is less than or equal to the first hydrogen threshold, although the vehicle experiences a collision of the target collision level, the hydrogen leakage is low and does not affect driving safety or the operation of the fuel cell. Therefore, the collision strategy can be determined as the first sub-control strategy, i.e., the vehicle can be controlled to output collision alarm information to prompt the user to stop the vehicle at an appropriate location for inspection. Specifically, the collision alarm information can be displayed to the user through the vehicle's user interface (text or icon) or output as voice through a voice output device.

[0058] In one possible implementation, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a first hydrogen threshold but less than a second hydrogen threshold, control the vehicle to output a collision alarm message and control the vehicle to close the hydrogen valve. The collision alarm message is used to prompt the user to stop and check the vehicle's condition.

[0059] In this embodiment, when the hydraulic oil level is greater than the second level threshold and the hydrogen leakage value is greater than the first hydrogen threshold but less than the second hydrogen threshold, hydrogen leakage will affect driving safety and, to some extent, the operation of the fuel cell. Therefore, the collision strategy can be determined as the second sub-control strategy. Specifically, the vehicle can be controlled to output collision alarm information to prompt the user to stop and inspect the vehicle at an appropriate location. The vehicle can also be controlled to close the hydrogen valve. Specifically, based on the vehicle's speed, a delay time for closing the hydrogen valve can be determined, and the valve will be closed after the delay time, providing the user with sufficient stopping time and preventing excessive hydrogen leakage from affecting safety. This collision alarm information can be displayed to the user via the vehicle's user interface (text or icon) or output as voice via a voice output device.

[0060] In one possible implementation, the controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a second hydrogen threshold, control the vehicle to output a severe collision alarm message, control the fuel cell controller to shut down, and control the vehicle to close the hydrogen valve. The severe collision alarm message is used to prompt the user to stop immediately and check the vehicle's condition.

[0061] In this embodiment, when the hydraulic oil level exceeds the second level threshold and the hydrogen leakage value exceeds the second hydrogen threshold, severely impacting driving safety and fuel cell operation, the collision strategy can be determined as the third sub-control strategy. Specifically, the vehicle can be controlled to output a severe collision alarm message to prompt the user to immediately stop and check the vehicle's condition. Furthermore, to prevent accidents such as explosions caused by hydrogen leakage, the vehicle can be controlled to immediately close the hydrogen valve, reducing the hydrogen leakage, and the fuel cell controller can be shut down to stop the fuel cell's operation. This severe collision alarm message can be displayed to the user via the vehicle's user interface (text or icon) or output as a voice message via a voice output device.

[0062] In one possible implementation, the second liquid level threshold can be obtained by looking up a table. That is, the controller can determine the second liquid level threshold based on the vehicle's operating parameters and a liquid level threshold parameter table. The vehicle's operating parameters can be its driving speed, and the liquid level threshold parameter table represents the correspondence between the vehicle's driving speed and the liquid level threshold. The controller can obtain the vehicle's current driving speed and then look up the liquid level threshold parameter table to obtain the corresponding second liquid level threshold.

[0063] In one possible implementation, the second liquid level threshold can be calculated in real time, and the controller is further configured to determine the second liquid level threshold based on the target collision parameters and the vehicle's operating parameters, wherein the target collision parameters characterize the target energy value absorbed by the energy absorption device 2.

[0064] In this embodiment, the target collision parameter can characterize the target energy value absorbed by the energy-absorbing device 2, i.e., the pre-set upper limit of absorbed energy. This target collision parameter can be set according to actual conditions. The vehicle's operating parameters may include the vehicle's speed. Based on the target collision parameter and the vehicle's operating parameters, the allowable hydraulic oil discharge volume can be calculated in real time, and then combined with the size of the hydraulic oil tank 1, a second liquid level threshold can be obtained. The allowable hydraulic oil discharge volume can be the allowable volume of hydraulic oil discharged from the energy-absorbing device 2 to the hydraulic oil tank 1.

[0065] Specifically, the cross-sectional area of ​​the drain hole can be determined first based on its radius. The target collision time can then be determined based on the vehicle's speed. Specifically, with constant deceleration, the target collision time is positively correlated with the vehicle's speed. Therefore, the allowable hydraulic oil discharge volume can be calculated using the drain hole cross-sectional area, target collision time, and target collision parameters, combined with the volume calculation formula. Then, the target hydraulic oil level change is determined by dividing the allowable hydraulic oil discharge volume by the bottom area of ​​the hydraulic oil tank 1. Finally, the second level threshold is obtained by adding the original hydraulic oil level and the target hydraulic oil level change.

[0066] The relevant parameters of the energy absorption device can be: hydraulic oil density ρ; drain hole radius r; and drain hole cross-sectional area: The internal cavity volume of each energy-absorbing device is V1=V2.

[0067] The relevant parameters for a 100% side impact test of a vehicle can be: the vehicle's fully loaded mass m1; the vehicle's speed V1; and the vehicle's total kinetic energy Q1. Collision time t.

[0068] Assumptions: Hydraulic oil flows out of the drain hole at a constant speed; hydraulic oil is incompressible.

[0069] Therefore, the liquid outflow velocity is: = ;

[0070] Mass of fluid flowing out: m2= ;

[0071] Kinetic energy released by liquid: =

[0072] From the above formula, the volume calculation formula can be obtained as follows:

[0073]

[0074] in, For the permissible hydraulic oil discharge volume, For target collision parameters, The cross-sectional area of ​​the drain hole is... The time of collision with the target.

[0075] In another embodiment, the design discharge kinetic energy and the design total kinetic energy of the vehicle can be determined based on the design parameters, the cross-sectional area of ​​the drain hole, and the cavity volume of the energy absorption device 2. The energy absorption ratio is then obtained by dividing the design discharge kinetic energy by the design total kinetic energy of the vehicle. This allows for adjustments to the parameters of the energy absorption device 2, including its length, width, height, drain hole cross-sectional area, and thickness, to achieve better energy absorption performance.

[0076] The design parameters include the design vehicle's full-load mass, design speed, design collision time, and design outflow volume. The assumptions are that the hydraulic oil flows out uniformly only from the drain hole; the hydraulic oil is incompressible; and after the collision, the energy-absorbing device 2 deforms to 20% of its original size, meaning 80% of the liquid is released. Based on the dimensions of the energy-absorbing device 2, the design outflow volume is obtained. Based on the design outflow volume, the drain hole cross-sectional area, and the design collision time, the fluid outflow velocity is obtained. Based on the design outflow volume and the hydraulic oil density, the fluid outflow mass is obtained. Finally, based on the fluid outflow velocity and fluid outflow mass, the design released kinetic energy is obtained. The total kinetic energy of the vehicle can be obtained based on the design vehicle's full-load mass and design speed. This calculation method allows for quantitative analysis of the vehicle collision severity, determining the energy absorption impact contribution of the energy-absorbing device 2 during a collision, guiding design and development, and more effectively protecting the hydrogen storage system's pipelines and valves to prevent hydrogen leakage and ensure the vehicle's hydrogen safety.

[0077] Figure 4 This is a schematic diagram of a vehicle provided according to one embodiment of the present disclosure, such as... Figure 4 As shown, vehicle 400 includes a hydrogen storage device collision control system 401.

[0078] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0079] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0080] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A collision control system for a hydrogen storage device, characterized in that, include: Hydraulic oil tank (1); Energy absorption device (2) is located outside the hydrogen storage device (4) and is connected to the hydraulic oil tank (1). It is filled with hydraulic oil and is used to absorb collision energy when a collision occurs and discharge the hydraulic oil to the hydraulic oil tank (1). The controller is configured as follows: Determine the target collision time based on the vehicle's speed; Based on the cross-sectional area of ​​the drain hole, the target collision time, and the target collision parameters, the allowable hydraulic oil discharge volume is determined, and the target collision parameters characterize the target energy value absorbed by the energy absorption device (2). The target hydraulic oil level is determined based on the allowable hydraulic oil discharge volume and the bottom area of ​​the hydraulic oil tank (1). The second level threshold is obtained based on the target hydraulic oil change level and the original hydraulic oil level. Based on the hydraulic oil level in the hydraulic oil tank (1) and the second level threshold, a collision control strategy is determined, and the vehicle is controlled according to the collision control strategy.

2. The collision control system for the hydrogen storage device according to claim 1, characterized in that, The controller is configured to control the vehicle to output collision warning information when the hydraulic oil level in the hydraulic oil tank (1) is greater than a first level threshold and less than or equal to a second level threshold. The collision warning information is used to prompt the user to check the vehicle condition.

3. The collision control system for the hydrogen storage device according to claim 1, characterized in that, The controller is configured to output a collision alarm message when the hydraulic oil level in the hydraulic oil tank (1) is greater than a second level threshold. The collision alarm message is used to prompt the user to stop and check the vehicle condition.

4. The collision control system for the hydrogen storage device according to claim 1, characterized in that, The system also includes a hydrogen concentration sensor configured to detect hydrogen leakage. The controller is configured to: determine a collision control strategy based on the hydraulic oil level and the hydrogen leakage value when the hydraulic oil level in the hydraulic oil tank is greater than a second level threshold, and control the vehicle according to the collision control strategy.

5. The collision control system for the hydrogen storage device according to claim 4, characterized in that, The controller is configured to output a collision alarm message when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is less than or equal to a first hydrogen threshold. The collision alarm message is used to prompt the user to stop and check the vehicle's condition.

6. The collision control system for the hydrogen storage device according to claim 4, characterized in that, The controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a first hydrogen threshold but less than a second hydrogen threshold, control the vehicle to output a collision alarm message and control the vehicle to close the hydrogen valve. The collision alarm message is used to prompt the user to stop and check the vehicle's condition.

7. The collision control system for the hydrogen storage device according to claim 4, characterized in that, The controller is configured to: when the hydraulic oil level is greater than a second level threshold and the hydrogen leakage value is greater than a second hydrogen threshold, control the vehicle to output a severe collision alarm message, control the fuel cell controller to shut down, and control the vehicle to close the hydrogen valve. The severe collision alarm message is used to prompt the user to stop immediately and check the vehicle's condition.

8. A vehicle, characterized in that, The collision control system for the hydrogen storage device included in any one of claims 1-7.

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