Vehicle-mounted hydrogen storage system of new energy vehicle

Abstract

The application discloses a vehicle-mounted hydrogen storage system of a new energy vehicle, which comprises a plurality of concentric annular shells, a protection pipe is arranged on the inner side of the middle annular shell, a plurality of pressure tanks are arranged in the annular shell, one pressure tank is arranged in the protection pipe, positioning rings are arranged between the protection pipe and the middle annular shell and between two adjacent annular shells. The plurality of annular shells are arranged concentrically, and a plurality of pressure tanks are arranged in the annular shell, so that the pressure tanks are protected from the outside through the annular shell, the impact strength and the shock resistance of the pressure tank are ensured, the annularly arranged pressure tanks are connected together through the connecting pipe one, the connecting pipe two and the connecting pipe three are connected, all the pressure tanks are connected together, and then the liquid hydrogen is delivered to the fuel cell system through the connecting pipe three, so that the combined hydrogen storage tank is achieved, the single hydrogen storage tank is smaller in size, and the safety is high.

Description

Technical Field

[0001] This invention relates to the field of 35MPa on-board hydrogen storage system technology, specifically to an on-board hydrogen storage system for a new energy vehicle. Background Technology

[0002] Onboard hydrogen storage systems are a crucial component of fuel cell vehicles. Currently, the main types of hydrogen storage include high-pressure gaseous hydrogen storage, solid hydrogen in metal alloys, and cryogenic liquid hydrogen storage. Among these, high-pressure gaseous hydrogen storage has lower costs and mature technology, but its storage capacity is low and it requires high-pressure gaseous hydrogen storage cylinders; it is currently commercialized in passenger vehicles. Cryogenic liquid hydrogen storage has higher hydrogen density and purity, but its liquefaction energy consumption is high; it is currently used in aerospace and high-power commercial vehicles. Solid hydrogen in metal alloys is safe, stable, and easy to operate, but its cost is high, and it represents the main direction for future industry development.

[0003] Existing on-board hydrogen storage systems almost exclusively use large tanks, with no more than five tanks typically installed per passenger vehicle. During use, this structure places high safety requirements on the hydrogen storage tanks, and their shock resistance needs further optimization. Summary of the Invention

[0004] At least in view of the shortcomings of the prior art, the present invention provides an on-board hydrogen storage system for new energy vehicles, which adopts several combined hydrogen storage tanks and has the advantages of smaller size of individual hydrogen storage tanks, higher safety and better shock resistance.

[0005] The present invention adopts the following technical solution: an on-board hydrogen storage system for a new energy vehicle, comprising multiple concentric annular shells, a protective tube disposed inside the inner side of the middle annular shell, multiple pressure tanks disposed inside the annular shell, a pressure tank disposed inside the protective tube, positioning rings disposed between the protective tube and the middle annular shell and between two adjacent annular shells, a clamping assembly sleeved on the outermost annular shell, a fixing shell sleeved on the outer side of the clamping assembly, and a buffer assembly disposed between the bottom of the clamping assembly and the bottom wall of the fixing shell.

[0006] Furthermore, support rings are fixedly installed at both ends of the pressure tank. The support rings are fixedly installed on the inner wall of the annular shell or the protective tube. A connecting pipe 1 is fixedly installed between the pressure tanks arranged in annularly. A connecting pipe 2 is fixedly installed through the top of the annular shell. The bottom end of the connecting pipe 2 is fixedly installed on one of the connecting pipes 1. A connecting pipe 3 is fixedly installed at the top of the pressure tank located inside the protective tube. The other end of the connecting pipe 2 is fixedly installed on the surface of the connecting pipe 3.

[0007] Furthermore, the positioning ring includes two rubber collars, one inside and one outside, which are respectively attached to the surfaces of two adjacent annular shells. The inner rubber collar of the positioning ring in the middle is attached to the surface of the protective tube. Multiple rubber collars are fixedly installed between the two rubber collars. Multiple annular cavities are formed between the multiple rubber collars and the two rubber collars. The annular cavities are filled with nitrogen gas.

[0008] Furthermore, the clamping assembly includes a tray fitted onto the bottom of the annular shell, a covering ring fixedly installed on the top of the tray, the covering ring being fitted onto the outer side of the outermost annular shell, lugs arrayed on the inner edge of the top of the covering ring, a slide rod slidably connected to the other end of the lugs, a pressure plate slidably connected inside the covering ring, the bottom end of the slide rod being fixedly installed on the top of the pressure plate, and a spring fitted onto the outer side of the slide rod, the spring being fixedly installed between the lugs and the pressure plate.

[0009] Furthermore, the fixed shell includes a square sleeve fitted on the outside of the tray, a base is fixedly installed at the bottom of the square sleeve, and a sliding connection is installed at the bottom of each corner of the tray. A baffle is fixedly installed at the top corner of the square sleeve.

[0010] Furthermore, the buffer assembly includes a second spring fixedly installed between the center of the tray and the center of the base, a piston rod array is arranged on the bottom of the tray, a piston plate is fixedly installed at the bottom end of the piston rod, a piston cylinder is sleeved on the outside of the piston plate, the piston cylinder is fixedly installed on the top of the base, and the piston cylinder is filled with hydraulic oil.

[0011] Furthermore, the diameter of the piston plate is smaller than the inner diameter of the piston cylinder.

[0012] Furthermore, the buffer assembly also includes four fixed plates fixedly installed at the bottom of the tray. Two insert rods are slidably connected through the surface of the fixed plates. A friction plate is fixedly installed at the end of the insert rod away from the center of the tray. The four friction plates abut against the four side walls of the square sleeve respectively. Springs are sleeved on the outside of the insert rods. Springs are fixedly installed between the fixed plates and the friction plates respectively.

[0013] Furthermore, each of the two connecting pipes is equipped with a control valve.

[0014] Beneficial effects: The on-board hydrogen storage system for new energy vehicles provided by this invention uses multiple concentric annular shells, with multiple pressure tanks installed inside the annular shells. This protects the pressure tanks from the outside by the annular shells, ensuring their impact resistance. The annularly arranged pressure tanks are connected in series by a connecting pipe one, and then connected together by connecting pipes two and three, connecting all the pressure tanks together. Liquid hydrogen is then supplied to the fuel cell system through connecting pipe three, thus forming a combined hydrogen storage tank. This invention cleverly adopts a combined structure of "rings within rings, tanks inside rings," which significantly improves the safety and stability of the entire on-board hydrogen storage system, making each individual hydrogen storage tank smaller and more shock-resistant. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the on-board hydrogen storage system of the new energy vehicle in the embodiment;

[0016] Figure 2 This is a three-dimensional structural diagram of the clamping component of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0017] Figure 3 This is a three-dimensional structural diagram of the annular shell of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0018] Figure 4 This is a schematic diagram of the pressure tank structure of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0019] Figure 5 This is a schematic diagram of the main view cross-sectional structure of the clamping component of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0020] Figure 6 This is a three-dimensional structural diagram of the positioning ring of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0021] Figure 7 This is a three-dimensional structural diagram of the fixed shell of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0022] Figure 8 This is a three-dimensional structural diagram of the buffer component of the on-board hydrogen storage system of the new energy vehicle in the embodiment.

[0023] In the diagram: 100, annular shell; 200, protective tube; 300, pressure tank; 400, positioning ring; 500, clamping assembly; 600, fixed shell; 700, buffer assembly; 301, support ring; 302, connecting pipe one; 303, connecting pipe two; 304, connecting pipe three; 401, rubber collar one; 402, rubber collar two; 501, tray; 502, covering ring; 503, lug; 504, slide rod; 505, pressure plate; 506, spring one; 601, base; 602, square sleeve; 603, baffle; 701, spring two; 702, piston rod; 703, piston plate; 704, piston cylinder; 705, fixed plate; 706, insertion rod; 707, friction plate; 708, spring three. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-8 A hydrogen storage system for a new energy vehicle includes multiple concentric annular shells 100. Each annular shell 100 is woven from aluminum alloy strips and is ring-shaped with an internal annular cavity. A protective tube 200 is installed inside the middle annular shell 100. Multiple pressure tanks 300 are installed inside the annular shell 100, and one pressure tank 300 is installed inside the protective tube 200. Positioning rings 400 are installed between the protective tube 200 and the middle annular shell 100, as well as between adjacent annular shells 100. A clamping assembly 500 is fitted around the outermost annular shell 100, and a fixing shell 600 is fitted around the clamping assembly 500. A buffer assembly 700 is installed between the bottom of the clamping assembly 500 and the bottom wall of the fixing shell 600.

[0026] Please see Figure 1-4Each pressure tank 300 has a support ring 301 fixedly installed at both ends. The support rings 301 are fixedly installed on the inner wall of the annular shell 100 or the protective tube 200, stabilizing the pressure tank 300. A connecting pipe 302 is fixedly installed between the annularly arranged pressure tanks 300, connecting multiple pressure tanks 300 in series. A connecting pipe 303 is fixedly installed through the top of the annular shell 100. The bottom end of the connecting pipe 303 is fixedly installed on one of the connecting pipes 302. A connecting pipe 304 is fixedly installed on the top of the pressure tank 300 located inside the protective tube 200, and the other end of the connecting pipe 303 is fixedly installed on the surface of the connecting pipe 304. Multiple pressure tanks 300 connected in series are connected to the connecting pipe 304 through the connecting pipe 303. The other end of the connecting pipe 304 is connected to the fuel cell system, which is connected to the drive motor inside the vehicle. Each of the two connecting pipes 303 is equipped with a control valve, which supplies liquid hydrogen to the fuel cell system through the three connecting pipes 304. The liquid hydrogen is burned inside the fuel cell to power the drive motor.

[0027] Please see Figure 5-6 The positioning ring 400 includes two inner and outer rubber collars 401, which are respectively attached to the surfaces of two adjacent annular shells 100. The inner rubber collar 401 of the middle positioning ring 400 is attached to the surface of the protective tube 200. Multiple rubber collars 402 are fixedly installed between the two rubber collars 401. The multiple rubber collars 402 and the two rubber collars 401 enclose multiple annular cavities, which are filled with nitrogen gas, creating a positive pressure state within the annular cavities. This assembly of rubber collars 401 and 402 limits the movement between the annular shells 100 and between the annular shells 100 and the protective tube 200, preventing shaking between the annular shells 100. It also provides cushioning in case of misalignment between the annular shells 100.

[0028] Please see Figure 2 and Figure 5 and Figure 7The clamping assembly 500 includes a tray 501 fitted onto the bottom of the annular shell 100. A covering ring 502 is fixedly installed on the top of the tray 501, and the covering ring 502 is fitted onto the outer side of the outermost annular shell 100. Lugs 503 are arranged in an array on the inner edge of the top of the covering ring 502. A slide rod 504 is slidably connected to the other end of the lugs 503. A pressure plate 505 is slidably connected inside the covering ring 502. Connecting tubes 2 303 and 3 304 pass through the pressure plate 505 and are slidably connected to the pressure plate 505. The bottom end of the slide rod 504 is fixedly installed on the top of the pressure plate 505. A spring 506 is fitted onto the outer side of the slide rod 504, and the spring 506 is fixedly installed between the lugs 503 and the pressure plate 505. The elasticity of spring 506 causes the assembly of pressure plate 505 and slide bar 504 to tend to move downwards, thereby clamping and fixing the annular shell 100 from the top and bottom sides through the cooperation of pressure plate 505 and tray 501. Multiple annular grooves are provided on the bottom of pressure plate 505 so that the annular shell 100 can fit against the bottom of pressure plate 505.

[0029] Please see Figure 7 The fixed housing 600 includes a square sleeve 602 fitted over the outside of the tray 501. A base 601 is fixedly installed at the bottom of the square sleeve 602. 507 is fixedly installed at the bottom of each corner of the tray 501, and 507 is slidably connected within the corner of the square sleeve 602. The corner engagement between 507 and the square sleeve 602 guides the sliding of the assembly of the tray 501 and the covering ring 502 within the base 601. A baffle 603 is fixedly installed at each corner of the top of the square sleeve 602. The baffle 603 limits the tray 501 from the top, preventing the tray 501 from detaching from the top of the square sleeve 602.

[0030] Please see Figure 7-8 The buffer assembly 700 includes a second spring 701 fixedly installed between the center of the tray 501 and the center of the base 601, supporting the tray 501. Piston rods 702 are arrayed at the bottom of the tray 501, with a piston plate 703 fixedly installed at the bottom end of the piston rods 702. A piston cylinder 704 is sleeved on the outside of the piston plate 703 and fixedly installed on the top of the base 601. The piston cylinder 704 is filled with hydraulic oil. The diameter of the piston plate 703 is smaller than the inner diameter of the piston cylinder 704. Therefore, when the tray 501 vibrates longitudinally, the piston plate 703 slides up and down inside the piston cylinder 704. The hydraulic oil inside the piston cylinder 704 flows back and forth through the annular channel between the circumferential surface of the piston plate 703 and the inner wall of the piston cylinder 704. The resistance of the hydraulic oil flow to the piston plate 703 inhibits its up-and-down movement within the piston cylinder 704, thereby suppressing the longitudinal vibration of the tray 501.

[0031] Please see Figure 8The buffer assembly 700 also includes four fixing plates 705 fixedly installed at the bottom of the tray 501. Two insert rods 706 are slidably connected through the surface of each fixing plate 705. A friction plate 707 is fixedly installed at the end of each insert rod 706 away from the center of the tray 501. The four friction plates 707 respectively abut against the four side walls of the square sleeve 602. Springs 708 are sleeved on the outer side of each insert rod 706, and are fixedly installed between the fixing plates 705 and the friction plates 707. The elasticity of the springs 708 keeps the friction plates 707 tightly pressed against the side walls of the square sleeve 602. Therefore, when the tray 501 vibrates longitudinally, the friction between the friction plates 707 and the square sleeve 602 suppresses the longitudinal vibration of the tray 501.

[0032] In use, multiple annular shells 100 are arranged concentrically, and multiple pressure tanks 300 are set inside the annular shells 100. The annular shells 100 protect the pressure tanks 300 from the outside, ensuring that the pressure tanks 300 can withstand impact. The annularly arranged pressure tanks 300 are connected in series through connecting pipe 1 302. With the connection of connecting pipe 2 303 and connecting pipe 3 304, all pressure tanks 300 are connected together. Liquid hydrogen is then delivered to the fuel cell system through connecting pipe 3 304.

[0033] The pressure tank 300 is further protected from the outside by the covering ring 502 and the square sleeve 602, while the assembly of the rubber collar one 401 and the rubber collar two 402 provides cushioning between the annular shell 100.

[0034] During vehicle movement, the annular shell 100 vibrates up and down, causing the tray 501 to vibrate up and down as well. This causes the piston plate 703 to slide up and down within the piston cylinder 704. Hydraulic oil inside the piston cylinder 704 flows up and down through the annular channel between the piston plate 703 and the piston cylinder 704. The resistance of the hydraulic oil flow to the piston plate 703 suppresses the vibration of the tray 501, thus buffering its vibration. Simultaneously, the elasticity of the spring 708 ensures the friction between the friction plate 707 and the square sleeve 602, further suppressing the vibration of the tray 501. This further buffers the vibration of the tray 501.

[0035] This invention ingeniously employs a combined structure of "ring within ring, tank inside ring", which significantly improves the safety and stability of the entire on-board hydrogen storage system, making each hydrogen storage tank smaller and more shock-resistant.

Claims

1. A vehicle-mounted hydrogen storage system of a new energy vehicle, characterized in that: The system comprises multiple concentric annular shells (100), with a protective tube (200) disposed inside the inner side of the middle annular shell (100). Multiple pressure tanks (300) are disposed inside the annular shell (100), and one pressure tank (300) is disposed inside the protective tube (200). Positioning rings (400) are provided between the protective tube (200) and the middle annular shell (100), as well as between adjacent annular shells (100). A sleeve is provided on the outermost annular shell (100). A clamping assembly (500) is provided, with a fixed shell (600) fitted around its outer side. A buffer assembly (700) is provided between the bottom of the clamping assembly (500) and the bottom wall of the fixed shell (600). Support rings (301) are fixedly installed at both ends of the pressure tank (300). The support rings (301) are fixedly installed on the inner wall of the annular shell (100) or the protective tube (200). The pressure tanks (300) arranged in annular arrangement are fixedly installed between each other. The annular shell (100) is equipped with a connecting pipe 1 (302), and a connecting pipe 2 (303) is fixedly installed through the top of the annular shell (100). The bottom end of the connecting pipe 2 (303) is fixedly installed on one of the connecting pipes 1 (302). A connecting pipe 3 (304) is fixedly installed at the top of the pressure tank (300) located inside the protective tube (200), and the other end of the connecting pipe 2 (303) is fixedly installed on the surface of the connecting pipe 3 (304). The positioning ring (400) includes two rubber sleeves, one inside and one outside. (401) Two rubber collars (401) are respectively attached to the surfaces of two adjacent annular shells (100). The rubber collar (401) on the inner side of the positioning ring (400) in the middle is attached to the surface of the protective tube (200). Multiple rubber collars (402) are fixedly installed between the two rubber collars (401). Multiple annular cavities are formed between the multiple rubber collars (402) and the two rubber collars (401). The annular cavities are filled with nitrogen gas.

2. The hydrogen storage system for new energy vehicles according to claim 1, characterized in that: The clamping assembly (500) includes a tray (501) fitted onto the bottom of an annular shell (100). A covering ring (502) is fixedly installed on the top of the tray (501). The covering ring (502) is fitted onto the outer side of the outermost annular shell (100). Lugs (503) are arranged in an array on the inner edge of the top of the covering ring (502). A slide rod (504) is slidably connected to the other end of the lugs (503). A pressure plate (505) is slidably connected inside the covering ring (502). The bottom end of the slide rod (504) is fixedly installed on the top of the pressure plate (505). A spring (506) is fitted onto the outer side of the slide rod (504). The spring (506) is fixedly installed between the lugs (503) and the pressure plate (505).

3. The hydrogen storage system for new energy vehicles according to claim 2, characterized in that: The fixed shell (600) includes a square sleeve (602) sleeved on the outside of the tray (501). A base (601) is fixedly installed at the bottom of the square sleeve (602). (507) is fixedly installed at the bottom of each corner of the tray (501). (507) is slidably connected inside the corner of the square sleeve (602). A baffle (603) is fixedly installed at the top corner of the square sleeve (602).

4. The hydrogen storage system for new energy vehicles according to claim 3, characterized in that: The buffer assembly (700) includes a spring (701) fixedly installed between the center of the tray (501) and the center of the base (601). A piston rod (702) is arranged in an array at the bottom of the tray (501). A piston plate (703) is fixedly installed at the bottom end of the piston rod (702). A piston cylinder (704) is sleeved on the outside of the piston plate (703). The piston cylinder (704) is fixedly installed on the top of the base (601). The piston cylinder (704) is filled with hydraulic oil.

5. The hydrogen storage system for new energy vehicles according to claim 4, characterized in that: The diameter of the piston plate (703) is smaller than the inner diameter of the piston cylinder (704).

6. The on-board hydrogen storage system for new energy vehicles according to claim 5, characterized in that: The buffer assembly (700) also includes four fixing plates (705) fixedly installed at the bottom of the tray (501). Two insert rods (706) are slidably connected through the surface of the fixing plate (705). A friction plate (707) is fixedly installed at one end of the insert rod (706) away from the center of the tray (501). The four friction plates (707) respectively abut against the four side walls of the square sleeve (602). A spring three (708) is sleeved on the outside of the insert rod (706). The spring three (708) is fixedly installed between the fixing plate (705) and the friction plate (707).

7. The on-board hydrogen storage system for new energy vehicles according to claim 6, characterized in that: Each of the two connecting pipes (303) is equipped with a control valve.

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