Hydrogen fuel cell vehicle braking energy recovery method, recovery system and vehicle

Abstract

The invention relates to the technical field of vehicles, and particularly discloses a hydrogen fuel cell vehicle braking energy recovery method and system and a vehicle. A10, the state of the vehicle is monitored in real time; a20, whether the vehicle is braked or not is judged, if yes, A30 is executed, and if not, A10 is returned; a30, the brake regeneration module is started and charges the power battery; and A40, according to the electric quantity of the power battery, the brake regeneration module is adjusted to supply power to the power battery or the hydrogen production module, and the hydrogen produced by the hydrogen production module is filled into the hydrogen tank. Whether a vehicle is in a braking state or not is judged by detecting the state of the vehicle, if the vehicle is in the braking state, a braking regeneration module is started to convert braking energy of the vehicle into electric energy, the electric energy is provided for a battery, meanwhile, the electric quantity condition of the vehicle is monitored, excessive electric energy is provided for a hydrogen production module while the power battery is prevented from being overcharged, and the hydrogen production efficiency is improved. And the hydrogen generator is used for enabling the generated electric energy to generate water electrolysis reaction so as to generate hydrogen for the fuel cell to react to generate electric energy.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a braking energy recovery method, a recovery system and a vehicle for a hydrogen fuel cell vehicle. Background Art

[0002] With the increasing global demand for clean energy, hydrogen fuel cell vehicles (FCEVs) are gradually becoming an important development direction in the future transportation field due to their high energy efficiency and zero emissions characteristics. However, although hydrogen fuel cell vehicles perform well in energy utilization and environmental protection, they still face some challenges in battery management technology, especially the problem of wasted braking energy after the battery is fully charged.

[0003] When a hydrogen fuel cell vehicle brakes, it usually converts the kinetic energy of the vehicle into electrical energy through a regenerative braking system and stores it in the power battery to improve energy utilization efficiency. However, when the power battery is fully charged, the excess electrical energy often cannot be effectively stored or utilized, resulting in the waste of this part of energy. This not only reduces the overall energy efficiency of the vehicle, but also may impose an additional burden on the battery system and accelerate the aging of the battery.

[0004] Therefore, there is an urgent need for a braking energy recovery method, a recovery system and a vehicle for a hydrogen fuel cell vehicle to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a braking energy recovery method, a recovery system and a vehicle for a hydrogen fuel cell vehicle to solve the problem that the excess electrical energy cannot be effectively stored or utilized when the power battery of the vehicle is fully charged in the related art.

[0006] On the one hand, the present invention provides a braking energy recovery method for a hydrogen fuel cell vehicle, which is implemented through a braking energy recovery system. The braking energy recovery system includes a hydrogen production module and a braking regeneration module. The braking regeneration module is used to convert the braking energy of the vehicle into electrical energy. The electrical energy generated by the braking regeneration module can supply power to the power battery, and the electrical energy generated by the braking regeneration module can supply power to the hydrogen production module. The braking energy recovery method for a hydrogen fuel cell vehicle includes a hydrogen production and storage method;

[0007] The hydrogen production and storage method includes:

[0008] A10: Monitor the state of the vehicle in real time;

[0009] A20: Determine whether the vehicle brakes. If so, execute A30. If not, return to A10;

[0010] A30: The braking regeneration module is started and charges the power battery;

[0011] A40: Adjust whether the braking regeneration module supplies power to the power battery or to the hydrogen production module according to the power of the power battery, and the hydrogen produced by the hydrogen production module is filled into the hydrogen tank.

[0012] As a preferred technical solution of the braking energy recovery method for a hydrogen fuel cell vehicle, A40 includes:

[0013] A401: Monitor the real-time power Q of the power battery;

[0014] A402: If Q≥q1, where q1 is a preset value, if so, execute A403, if not, return to A401;

[0015] A403: The braking regeneration module stops supplying power to the power battery, and the braking regeneration module starts supplying power to the hydrogen production module to fill hydrogen into the hydrogen tank.

[0016] As a preferred technical solution of the braking energy recovery method for a hydrogen fuel cell vehicle, A40 further includes:

[0017] A404: If Q<q2, where q2 is a preset value, if so, execute A405, if not, return to A401;

[0018] A405: The braking regeneration module stops supplying power to the hydrogen production module, the braking regeneration module starts supplying power to the power battery, and returns to A401.

[0019] As a preferred technical solution of the braking energy recovery method for a hydrogen fuel cell vehicle, in A40, during the hydrogen production process of the hydrogen production module, the distilled water generated by the operation of the hydrogen fuel cell is used for electrolytic water hydrogen production.

[0020] As a preferred technical solution of the braking energy recovery method for a hydrogen fuel cell vehicle, the braking energy recovery method for a hydrogen fuel cell vehicle further includes a hydrogen tank monitoring method;

[0021] The hydrogen tank monitoring method includes:

[0022] B10: Monitor the air pressure value A in the hydrogen tank:

[0023] B20: Determine the working state of the hydrogen production module according to the magnitude of the air pressure value A in the hydrogen tank, and return to B10.

[0024] As a preferred technical solution of the braking energy recovery method for a hydrogen fuel cell vehicle, B20 specifically includes:

[0025] B201: If A≥a, where a is the maximum air pressure value allowed for the hydrogen tank to store gas, if so, execute B202, if not, execute B203;

[0026] B202: The braking regeneration module stops supplying power to the hydrogen production module and returns to B10;

[0027] B203: The braking regeneration module starts supplying power to the hydrogen production module and returns to B10.

[0028] On the other hand, the present invention provides a braking energy recovery system. By the hydrogen fuel cell vehicle braking energy recovery method in any of the above solutions in real time, the braking energy recovery system includes the hydrogen production module and the braking regeneration module. The hydrogen production module includes a hydrogen generator and a water storage tank. The water storage tank is used to collect the distilled water after the fuel cell reaction. The braking regeneration module is electrically connected to the hydrogen generator and the power battery respectively. The hydrogen generator is used to electrolyze the distilled water in the water storage tank, and the produced hydrogen is filled into the hydrogen tank. The braking regeneration module is used to convert the braking energy of the vehicle into electric energy.

[0029] As a preferred technical solution of the braking energy recovery system, the hydrogen production module further includes a first compressor, and the first compressor is used to compress the produced hydrogen and then fill it into the hydrogen tank.

[0030] As a preferred technical solution of the braking energy recovery system, the hydrogen production module further includes a first one-way valve, and the first one-way valve is connected in series between the first compressor and the hydrogen tank.

[0031] On yet another aspect, the present invention provides a vehicle, including the braking energy recovery system in any of the above solutions.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a method for recovering braking energy of a hydrogen fuel cell vehicle, a recovery system and a vehicle, which are implemented through a braking energy recovery system. The braking energy recovery system includes a braking regeneration module and a hydrogen production module. The braking regeneration module is used to convert the braking energy of the vehicle into electric energy. The electric energy generated by the braking regeneration module can supply power to the power battery, and the electric energy generated by the braking regeneration module can also supply power to the hydrogen production module. The method for recovering braking energy of a hydrogen fuel cell vehicle includes a hydrogen production and storage method; the hydrogen production and storage method includes: A10: monitoring the state of the vehicle in real time; A20: determining whether the vehicle is braking. If so, execute A30. If not, return to A10; A30: start the braking regeneration module and charge the power battery; A40: according to the power of the power battery, adjust whether the braking regeneration module supplies power to the power battery or to the hydrogen production module, and the hydrogen produced by the hydrogen production module is filled into the hydrogen tank. By detecting the state of the vehicle to determine whether the vehicle is in a braking state, if the vehicle is in a braking state, the braking regeneration module is started to convert the braking energy of the vehicle into electric energy and charge the power battery. At the same time, monitor the power status of the vehicle. While avoiding overcharging of the power battery, supply the excess electric energy to the hydrogen production module to cause the generated electric energy to undergo an electrolytic water reaction to produce hydrogen, where the hydrogen is filled into the hydrogen tank for the fuel cell reaction to generate electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic connection diagram of the braking energy recovery system in Embodiment 1 of the present invention;

[0035] Figure 2 is a flowchart of the hydrogen production and storage method in Embodiment 1 of the present invention Figure 1 ;

[0036] Figure 3 is a flowchart of the hydrogen production and storage method in Embodiment 1 of the present invention Figure 2 ;

[0037] Figure 4 is a flowchart of the monitoring method for the air tank and the hydrogen tank in Embodiment 1 of the present invention;

[0038] Figure 5 is a schematic connection diagram of the braking energy recovery system in Embodiment 2 of the present invention.

[0039] In the figure:

[0040] 100, hydrogen tank; 200, air tank; 300, power battery;

[0041] 1, hydrogen production module; 11, hydrogen generator; 12, water storage tank; 13, first compressor; 14, second compressor; 15, first one-way valve; 16, second one-way valve;

[0042] 2, braking regeneration module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0047] Embodiment 1

[0048] As Figure 1As shown in the figure, this embodiment provides a method for recovering braking energy of a hydrogen fuel cell vehicle, which is implemented by a braking energy recovery system. The braking energy recovery system includes a hydrogen production module 1 and a braking regeneration module 2. The hydrogen production module 1 includes a hydrogen generator 11 and a water storage tank 12. The water storage tank 12 is used to collect the distilled water after the fuel cell reaction. The braking regeneration module 2 is electrically connected to the hydrogen generator 11 and the power battery 300 respectively. The hydrogen generator 11 is used to electrolyze the distilled water in the water storage tank 12, and the produced hydrogen is filled into the hydrogen tank 100. The braking regeneration module 2 is used to convert the braking energy of the vehicle into electric energy. In this embodiment, when the fuel cell in the vehicle works, hydrogen and oxygen react to generate distilled water and release electric energy. The electric energy is filled into the power battery 300 to improve the endurance of the vehicle. The produced distilled water is usually directly discharged. In order to avoid waste of distilled water, this embodiment stores the distilled water in the water storage tank 12 for subsequent use of the hydrogen generator 11. The hydrogen generator 11 uses the electric energy generated by the braking regeneration module 2 to perform an electrolytic water reaction on the distilled water in the water storage tank 12 to produce hydrogen. The produced hydrogen is filled into the hydrogen tank 100. Among them, the hydrogen in the hydrogen tank 100 is used to react with oxygen in the fuel cell to generate electrolytic water and release electric energy.

[0049] Optionally, the hydrogen production module 1 further includes a first compressor 13, and the first compressor 13 is used to compress the produced hydrogen and fill it into the hydrogen tank 100. In this embodiment, since the air pressure in the hydrogen tank 100 is greater than the external air pressure, the hydrogen produced by the hydrogen generator 11 cannot be directly injected into the hydrogen tank 100. Therefore, it needs to be pressurized by the first compressor 13 before it can be injected into the hydrogen tank 100.

[0050] Optionally, the hydrogen production module 1 further includes a first one-way valve 15, and the first one-way valve 15 is connected in series between the first compressor 13 and the hydrogen tank 100. In this embodiment, the first one-way valve 15 only allows hydrogen to flow from the first compressor 13 to the hydrogen tank 100. This setting can prevent the leakage of hydrogen in the hydrogen tank 100.

[0051] The method for recovering braking energy of a hydrogen fuel cell vehicle includes a hydrogen production and storage method;

[0052] As Figure 2 and Figure 3 shown, the hydrogen production and storage method includes:

[0053] A10: Monitor the state of the vehicle in real time.

[0054] In this step, the state of the vehicle is monitored to determine whether the vehicle is in a braking state. Specifically, it can be determined whether the vehicle is braking by monitoring the working state of the braking system.

[0055] A20: Determine whether the vehicle is braking. If so, execute A30. If not, return to A10.

[0056] In this step, when the vehicle is not braking, return to A10 to continue monitoring the vehicle status. When the vehicle brakes, execute A30.

[0057] A30: The braking regeneration module 2 is activated and charges the power battery 300.

[0058] In this step, the braking regeneration module 2 converts the braking force of the vehicle into electrical energy and preferentially charges the power battery 300 with this electrical energy.

[0059] A40: According to the power level of the power battery 300, adjust whether the braking regeneration module 2 supplies power to the power battery 300 or to the hydrogen production module 1. The hydrogen produced by the hydrogen production module 1 is filled into the hydrogen tank 100.

[0060] In this step, by monitoring the power level of the power battery 300, it is possible to avoid waste of electrical energy generated by the braking regeneration module 2 while also preventing overcharging of the power battery 300.

[0061] A40 specifically includes:

[0062] A401: Monitor the real-time power level Q of the power battery 300.

[0063] A402: If Q ≥ q1, where q1 is a preset value, then execute A403; if not, return to A401.

[0064] In this step, when the real-time power level Q of the power battery 300 ≥ q1, it indicates that the power battery 300 is about to be fully charged or already fully charged. Specifically, the value range of q1 is 90% - 100% of the total power.

[0065] A403: The braking regeneration module 2 stops supplying power to the power battery 300 and starts supplying power to the hydrogen production module 1 to fill the hydrogen tank 100 with hydrogen.

[0066] In this step, when Q ≥ q1, it means that the power battery 300 is about to be fully charged or already fully charged. If the power battery continues to be charged, it is likely to cause overcharging of the power battery. Therefore, the braking regeneration module 2 stops supplying power to the power battery 300. To avoid waste of electrical energy generated by the braking regeneration module 2, the electrical energy generated by the braking regeneration module 2 is then provided to the hydrogen production module 1 to obtain hydrogen, and the generated hydrogen is filled into the hydrogen tank 100 for later use in the fuel cell. Therefore, this step can avoid waste of electrical energy generated by the braking regeneration module 2.

[0067] A404: If Q < q2, where q2 is a preset value, then execute A405; if not, return to A401.

[0068] In this step, when Q < q2, it indicates that the power of the power battery 300 is not full and charging can be carried out. Therefore, A405 is executed. The value range of q2 is 10% - 90% of the total power, and q2 < q1.

[0069] Optionally, the value of q2 can be set by the driver. This setting can adjust the proportion of the electric energy generated by the braking regeneration module 2 provided to the hydrogen generator 2 and the power battery 300 respectively. The larger the value of q2, the more electric energy generated by the braking regeneration module 2 the power battery 300 obtains; the smaller the value of q2, the more electric energy generated by the braking regeneration module 2 the hydrogen generator 2 obtains.

[0070] A405: The braking regeneration module 2 stops supplying power to the hydrogen generation module 1, and the braking regeneration module 2 starts to supply power to the power battery 300, and returns to A401.

[0071] In this step, the electric energy generated by the braking regeneration module 2 replenishes the power of the power battery 300.

[0072] Optionally, in A40, during the hydrogen generation process of the hydrogen generation module 1, the distilled water generated by the operation of the hydrogen fuel cell is used for electrolytic water hydrogen generation. In this step, if distilled water is added alone, the cost of hydrogen generation will increase. This setting can solve the problem of waste of distilled water generated by the fuel cell and reduce the cost of hydrogen generation at the same time.

[0073] Optionally, the hydrogen fuel cell vehicle braking energy recovery method further includes a hydrogen tank monitoring method;

[0074] As Figure 4 shown, the hydrogen tank monitoring method includes:

[0075] B10: Monitor the air pressure value A in the hydrogen tank 100.

[0076] In this step, a pressure sensor is set in the hydrogen tank 100. Through the pressure sensor, the pressure value in the hydrogen tank 100 can be monitored, and then it can be judged whether the hydrogen tank 100 can still be filled with the corresponding hydrogen.

[0077] B20: Determine the working state of the hydrogen generation module 1 according to the size of the air pressure value A in the hydrogen tank 100, and return to B10. In this step, the working state of the hydrogen generation module 1 includes the power on and off of the hydrogen generator 11.

[0078] Optionally, B20 specifically includes:

[0079] B201: If A ≥ a, where a is the maximum air pressure value allowed for the hydrogen tank 100 to store gas, yes, then execute B202, otherwise execute B203.

[0080] In this step, when A ≥ a, it means that no more hydrogen can be stored in the hydrogen tank 100.

[0081] B202: The braking regeneration module 2 stops supplying power to the hydrogen production module 1 and returns to B10.

[0082] In this step, the hydrogen generator 11 of the hydrogen production module 1 stops working and thus no longer produces hydrogen.

[0083] B203: The braking regeneration module 2 starts supplying power to the hydrogen production module 1 and returns to B10.

[0084] In this step, the hydrogen generator 11 of the hydrogen production module 1 continues to work and thus produces hydrogen to fill the hydrogen tank 100.

[0085] This embodiment also provides a vehicle including the braking energy recovery system in the above solution.

[0086] By detecting the state of the vehicle to determine whether the vehicle is in a braking state, if the vehicle is in a braking state, the braking regeneration module 2 is started to convert the braking energy of the vehicle into electric energy and charge the power battery 300. At the same time, the power status of the vehicle is monitored. While avoiding overcharging of the power battery 300, the excess electric energy is supplied to the hydrogen production module 1 to electrolyze water with the generated electric energy to produce hydrogen. Among them, the hydrogen is filled into the hydrogen tank for the fuel cell reaction to generate electric energy.

[0087] Embodiment Two

[0088] As Figure 5 shown, this embodiment is basically the same as Embodiment One, and the difference lies in that: Optionally, the oxygen generated during the hydrogen production process of the hydrogen generator 11 is filled into the gas tank 200, and the oxygen in the gas tank 200 is used to supply gas to the pneumatic equipment of the vehicle, such as pneumatic brakes and pneumatic seats, etc., to reduce the startup frequency of the air pump.

[0089] Optionally, the hydrogen production module 1 further includes a second compressor 14, and the second compressor 14 is used to compress the produced oxygen and fill it into the gas tank 200. In this embodiment, since the air pressure in the gas tank 200 is greater than the external air pressure, the oxygen produced by the hydrogen generator 11 cannot be directly injected into the gas tank 200. Therefore, it needs to be pressurized by the second compressor 14 before it can be filled into the gas tank 200.

[0090] Optionally, the hydrogen production module 1 further includes a second one-way valve 16, and the second one-way valve 16 is connected in series between the second compressor 14 and the gas tank 200. The second one-way valve 16 only allows oxygen to flow from the second compressor 14 to the gas tank 200, and this setting can prevent the leakage of oxygen in the gas tank 200.

[0091] Obviously, the above embodiments of the present invention are merely examples given to clearly illustrate the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A method for braking energy recovery of a hydrogen fuel cell vehicle, characterized in that, Implemented by a braking energy recovery system, the braking energy recovery system includes a hydrogen production module (1) and a braking regeneration module (2). The braking regeneration module (2) is used to convert the braking energy of the vehicle into electric energy. The electric energy generated by the braking regeneration module (2) can supply power to the power battery (300), and the electric energy generated by the braking regeneration module (2) can supply power to the hydrogen production module (1). The braking energy recovery method for a hydrogen fuel cell vehicle includes hydrogen production and hydrogen storage methods; The hydrogen production and hydrogen storage methods include: A10: Monitor the state of the vehicle in real time; A20: Determine whether the vehicle is braking. If so, execute A30. If not, return to A10; A30: The braking regeneration module (2) is started and charges the power battery (300); A40: According to the power level of the power battery (300), adjust whether the braking regeneration module (2) supplies power to the power battery (300) or to the hydrogen production module (1). The hydrogen produced by the hydrogen production module (1) is filled into the hydrogen tank (100).

2. The braking energy recovery method for a hydrogen fuel cell vehicle according to claim 1, wherein A40 includes: A401: Monitor the real-time power level Q of the power battery (300); A402: If Q≥q1, where q1 is a preset value, if so, execute A403. If not, return to A401; A403: The braking regeneration module (2) stops supplying power to the power battery (300), and the braking regeneration module (2) starts to supply power to the hydrogen production module (1) to fill hydrogen into the hydrogen tank (100).

3. The braking energy recovery method for a hydrogen fuel cell vehicle according to claim 2, wherein A40 also includes: A404: If Q<q2, where q2 is a preset value, if so, execute A405. If not, return to A401; A405: The braking regeneration module (2) stops supplying power to the hydrogen production module (1), the braking regeneration module (2) starts to supply power to the power battery (300), and returns to A401.

4. The braking energy recovery method of the hydrogen fuel cell vehicle according to claim 1, characterized in that In A40, during the hydrogen production process of the hydrogen production module (1), distilled water generated by the operation of the hydrogen fuel cell is used for electrolytic hydrogen production.

5. The braking energy recovery method of the hydrogen fuel cell vehicle according to claim 1, wherein The braking energy recovery method for a hydrogen fuel cell vehicle also includes a hydrogen tank monitoring method; The hydrogen tank monitoring method includes: B10: Monitor the air pressure value A in the hydrogen tank (100); B20: Determine the working state of the hydrogen production module (1) according to the magnitude of the air pressure value A in the hydrogen tank (100), and return to B10.

6. The method for braking energy recovery of a hydrogen fuel cell vehicle according to claim 1, characterized in that, B20 specifically includes: B201: If A≥a, where a is the maximum air pressure value allowed for the hydrogen tank (100) to store gas, if so, execute B202. If not, execute B203; B202: The braking regeneration module (2) stops supplying power to the hydrogen production module (1) and returns to B10; B203: The braking regeneration module (2) starts to supply power to the hydrogen production module (1) and returns to B10.

7. Brake energy recovery system, characterized in that, Implemented by the braking energy recovery method of the hydrogen fuel cell vehicle according to any one of claims 1-6, the braking energy recovery system includes the hydrogen production module (1) and the braking regeneration module (2). The hydrogen production module (1) includes a hydrogen generator (11) and a water storage tank (12). The water storage tank (12) is used to collect the distilled water after the fuel cell reaction. The braking regeneration module (2) is electrically connected to the hydrogen generator (11) and the power battery (300) respectively. The hydrogen generator (11) is used to electrolyze the distilled water in the water storage tank (12), and the produced hydrogen is filled into the hydrogen tank (100). The braking regeneration module (2) is used to convert the braking energy of the vehicle into electric energy.

8. The braking energy recovery system according to claim 7, wherein The hydrogen production module (1) further includes a first compressor (13), and the first compressor (13) is used to compress the produced hydrogen and fill it into the hydrogen tank (100).

9. The braking energy recovery system according to claim 8, wherein, The hydrogen production module (1) further includes a first one-way valve (15), and the first one-way valve (15) is connected in series between the first compressor (13) and the hydrogen tank (100).

10. A vehicle, characterized in that, Including the braking energy recovery system according to any one of claims 7-9.

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