Vehicle-mounted hydrogen storage bottle group with energy storage and buffering functions

Abstract

The utility model discloses a vehicle-mounted hydrogen storage bottle group with energy storage and buffering functions, which relates to the technical field of vehicle-mounted hydrogen storage bottle groups and comprises a control system, an energy storage bottle, a vehicle-mounted bottle, an electromagnetic valve S-2 and a first pressure sensor. When the vehicle-mounted hydrogen storage bottle group performs hydrogen charging operation, pressure distribution and absorption in the hydrogen charging process can be performed through the energy storage bottle, part of hydrogen is stored in the energy storage bottle, and violent pressure fluctuation, flow speed reduction and temperature rise reduction in the hydrogen charging process of the vehicle-mounted hydrogen storage bottle group can be realized through the energy storage and buffering effects of the energy storage bottle; the safety and the stability of the vehicle-mounted hydrogen storage bottle group in the hydrogen filling process are improved, and the stable hydrogen filling process is achieved; and meanwhile, when the hydrogen stored in the energy storage bottle is used in the later period, the vehicle-mounted bottle can be reversely filled with the hydrogen, so that the hydrogen stored in the vehicle-mounted bottle is effectively supplemented, the use time of the hydrogen in the vehicle-mounted bottle once is prolonged, and the hydrogen filling frequency and frequency are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of on-vehicle hydrogen storage bottle groups, and particularly to an on-vehicle hydrogen storage bottle group with energy storage and buffering functions. Background Technique

[0002] The on-vehicle hydrogen storage system is an important part of fuel cell vehicles, including components such as high-pressure hydrogen storage bottles, integrated bottle valves, filling ports, check valves, filters, pressure reducing valves, high-pressure and low-pressure pressure sensors, and hydrogen pipelines. Its main function is to provide hydrogen with stable pressure and flow rate for the fuel cell system; due to the advantages of environmental protection and high efficiency of hydrogen fuel cells, more and more automobile manufacturers have begun to apply hydrogen storage bottles to new energy vehicles. The storage methods of hydrogen in China include high-pressure gaseous, cryogenic liquid, organic liquid hydrogen storage, and solid hydrogen storage, etc. Gaseous hydrogen storage is the current mainstream hydrogen storage method. The biggest advantage of gaseous hydrogen storage is its convenience in use, easy satisfaction of storage requirements, and low cost.

[0003] At present, when the on-vehicle hydrogen storage bottle group is filled with hydrogen, when filling hydrogen through a hydrogen filling machine or directly filling with a compressor, due to the large pressure difference (tens of MPa) between the inside of the on-vehicle hydrogen storage bottle group and the gas source, it is easy to cause the flow rate of the hydrogen filling gas to be too large. At the same time, the pressure inside the on-vehicle bottle also rises relatively fast, resulting in a relatively fast rise in the temperature inside the bottle group, and finally forming some unsafe factors during the entire hydrogen filling process. Content of the Utility Model

[0004] The purpose of the utility model is to provide an on-vehicle hydrogen storage bottle group with energy storage and buffering functions to solve the problems raised in the above background technique.

[0005] In order to solve the above technical problems, the utility model provides the following technical solution: An on-vehicle hydrogen storage bottle group with energy storage and buffering functions includes a control system, an energy storage bottle, and a plurality of on-vehicle bottles. Two adjacent on-vehicle bottles are connected in series in sequence. The on-vehicle bottles are connected in series with the energy storage bottle. The energy storage bottle and the plurality of on-vehicle bottles are respectively electrically connected to the control system. An electromagnetic valve S-2 is provided between the on-vehicle bottle and the energy storage bottle. A first safety valve, an electromagnetic valve S-3, and a first pressure sensor are externally connected between two on-vehicle bottles. The first safety valve and the electromagnetic valve S-3 are both connected to a first relief port. The electromagnetic valve S-2, the electromagnetic valve S-3, and the first pressure sensor are respectively electrically connected to the control system.

[0006] Further, an electromagnetic valve S-1 is externally connected to an on-vehicle bottle at one end far from the energy storage bottle, and the electromagnetic valve S-1 is externally connected to a hydrogen filling pipeline.

[0007] Further, the energy storage bottle includes an energy storage gas storage area, a hydraulic system, and a power supercharging area. The energy storage gas storage area is communicated with the power supercharging area through the hydraulic system. A metal diaphragm is provided between the energy storage gas storage area and the hydraulic system.

[0008] Further, a third pressure sensor is provided on the energy storage and gas storage area, a second pressure sensor is provided on the hydraulic system, a fourth pressure sensor is provided at the bottom of the power supercharging area, and a fifth pressure sensor is provided at the top of the power supercharging area. The third pressure sensor, the second pressure sensor, the fourth pressure sensor, and the fifth pressure sensor are all electrically connected to the control system respectively.

[0009] Further, a second safety valve is provided at the top of the energy storage and gas storage area, and the second safety valve is connected to the second relief port.

[0010] Further, a sewage outlet is provided at the bottom of the outer wall of the hydraulic system.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] 1. By setting the control system, energy storage cylinders, vehicle-mounted cylinders, first safety valve, solenoid valve S-2, solenoid valve S-3, and first pressure sensor in the present utility model, when the vehicle-mounted hydrogen storage cylinder group is charged with hydrogen, at the beginning, the pressure difference is large, the pressure fluctuation of the gas is relatively large, and the hydrogen charging process is relatively unstable. At this time, the energy storage cylinder part of the hydrogen storage cylinder group can be used to distribute and absorb the pressure during the hydrogen charging process, store part of the hydrogen in the energy storage cylinder, and reduce the violent pressure fluctuation during the hydrogen charging process of the vehicle-mounted hydrogen storage cylinder group through the energy storage and buffering effects of the energy storage cylinder, slow down the flow rate, reduce the temperature rise, improve the safety and stability during the hydrogen charging process of the vehicle-mounted hydrogen storage cylinder group, and achieve a relatively stable hydrogen charging process; at the same time, the hydrogen stored in the energy storage cylinder can also be reverse-charged into the vehicle-mounted cylinder during the later use of hydrogen, realizing an effective supplement to the hydrogen storage capacity in the vehicle-mounted cylinder, extending the single-use time of hydrogen in the vehicle-mounted cylinder, and reducing the hydrogen charging frequency and times.

[0013] 2. The entire energy storage bottle of the present utility model consists of three parts. The first part is the energy storage and gas storage area, which is used to buffer and store the hydrogen coming from the front-end vehicle-mounted hydrogen storage bottle group. The second part is the hydraulic system, which is used for the pressurization and conduction of force between the first area and the third area of the energy storage bottle. The third part is the power pressurization area, which is used to provide the external compression force for the entire energy storage bottle, that is, the balance pressure in the energy storage and gas storage area. The pressure in the front-end vehicle-mounted hydrogen storage bottle group is detected in real time by the first pressure sensor and is interlocked with the control system. When the control system determines that the real-time pressure P1 detected by the first pressure sensor in the vehicle-mounted hydrogen storage bottle group fluctuates greatly or the rising rate is too fast, exceeding the previous set value A, the control system sends a signal to the third area of the energy storage bottle. The power pressurization area does work on the hydraulic system, and the pressure value of the hydraulic system is P2 (P2 = P1 - 2) MPa, and the value of P2 changes in real-time linkage with P1. At this time, the hydraulic system conducts the pressure value of P2 to the energy storage and gas storage area, and through the pressure and storage space conducted by the hydraulic system, the buffering and energy storage effects on the hydrogen in the front-end vehicle-mounted bottle are realized. When the hydrogen filling process of the vehicle-mounted bottle ends, the solenoid valve S-2 is closed, and the hydrogen filling and energy storage process of the entire vehicle-mounted hydrogen storage bottle group is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is the working principle diagram of the whole of the present utility model;

[0016] In the figure: 1. Control system; 2. Energy storage bottle; 201. Energy storage and gas storage area; 2011. Third pressure sensor; 2012. Second safety valve; 2013. Second discharge port; 202. Hydraulic system; 2021. Second pressure sensor; 2022. Drain port; 203. Power pressurization area; 2031. Fourth pressure sensor; 2032. Fifth pressure sensor; 204. Metal diaphragm; 3. Vehicle-mounted bottle; 4. First safety valve; 5. First discharge port; 6. First pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1, the present utility model provides a technical solution: a vehicle-mounted hydrogen storage bottle group with energy storage and buffering functions, including a control system 1, an energy storage bottle 2, and several vehicle-mounted bottles 3. Two adjacent vehicle-mounted bottles 3 are connected in series in sequence, the vehicle-mounted bottles 3 are connected in series with the energy storage bottle 2, and the energy storage bottle 2 and several vehicle-mounted bottles 3 are respectively electrically connected to the control system 1. An electromagnetic valve S-2 is provided between the vehicle-mounted bottle 3 and the energy storage bottle 2. A first safety valve 4, an electromagnetic valve S-3, and a first pressure sensor 6 are externally connected between two vehicle-mounted bottles 3. The first safety valve 4 and the electromagnetic valve S-3 are both connected to a first discharge port 5, and the electromagnetic valve S-2, the electromagnetic valve S-3, and the first pressure sensor 6 are respectively electrically connected to the control system 1; the energy storage bottle 2 includes an energy storage gas storage area 201, a hydraulic system 202, and a power boosting area 203. The energy storage gas storage area 201 is communicated with the power boosting area 203 through the hydraulic system 202, and a metal diaphragm 204 is provided between the energy storage gas storage area 201 and the hydraulic system 202.

[0019] An electromagnetic valve S-1 is externally connected to a vehicle-mounted bottle 3 at one end far from the energy storage bottle 2. The electromagnetic valve S-1 is externally connected to a hydrogen filling pipeline, and the hydrogen filling pipeline fills hydrogen into the vehicle-mounted bottle 3 through the electromagnetic valve S-1.

[0020] A third pressure sensor 2011 is provided on the energy storage gas storage area 201, a second pressure sensor 2021 is provided on the hydraulic system 202, a fourth pressure sensor 2031 is provided at the bottom of the power boosting area 203, a fifth pressure sensor 2032 is provided at the top of the power boosting area 203, and the third pressure sensor 2011, the second pressure sensor 2021, the fourth pressure sensor 2031, and the fifth pressure sensor 2032 are respectively electrically connected to the control system 1; the first pressure sensor 6, the second pressure sensor 2021, the third pressure sensor 2011, the fourth pressure sensor 2031, and the fifth pressure sensor 2032 respectively monitor the pressures of each part, and when overpressure occurs, corresponding safety discharge control is performed.

[0021] A second safety valve 2012 is provided at the top of the energy storage gas storage area 201. The second safety valve 2012 is connected to a second discharge port 2013, and the second safety valve 2012 and the second discharge port 2013 cooperate to realize the discharge and pressure relief treatment of the energy storage gas storage area 201; a sewage discharge port 2022 is provided at the bottom of the outer wall of the hydraulic system 202, and the sewage discharge port 2022 is used for sewage treatment of the oil in the hydraulic system 202.

[0022] The working principle of the present utility model:

[0023] Referring to the attached drawings of the specification Figure 1 , the present utility model is provided with a control system 1, an energy storage bottle 2, vehicle-mounted bottles 3, a first safety valve 4, an electromagnetic valve S-2, an electromagnetic valve S-3, and a first pressure sensor 6;

[0024] During hydrogen filling, the control system 1 detects the pressure inside the vehicle-mounted hydrogen storage cylinder group through the first pressure sensor 6 of the vehicle-mounted hydrogen storage cylinder group. When the pressure rise rate inside the vehicle-mounted hydrogen storage cylinder group and the pressure fluctuation of the vehicle-mounted hydrogen storage cylinder group are large and exceed the previous set value A of the control system 1, the control system opens the solenoid valve S-2 of the energy storage bottle 2 to buffer hydrogen with the energy storage bottle 2 and store energy; when the hydrogen filling action in the entire vehicle-mounted bottle 3 ends, the solenoid valve S-2 of the energy storage bottle 2 closes. At this time, the hydrogen pressure values at the front end part of the vehicle-mounted hydrogen storage cylinder group and in the energy storage area are balanced and consistent;

[0025] When hydrogen is consumed in the vehicle-mounted bottle 3, when the control system 1 detects that the pressure drop inside the vehicle-mounted hydrogen storage cylinder group exceeds the set value B, the solenoid valve S-2 of the energy storage bottle 2 is opened. Under the action of pressure, the hydrogen in the energy storage and gas storage area 201 is replenished to the front-end hydrogen storage cylinder group area, so that the hydrogen in the vehicle-mounted hydrogen storage cylinder group is effectively replenished. When the pressure in the energy storage bottle 2 is lower than the set value C, the solenoid valve S-2 closes and no longer supplies hydrogen to the vehicle-mounted bottle 3;

[0026] The entire energy storage bottle 2 consists of three parts. The first part is the energy storage and gas storage area 201, which is used to buffer and store hydrogen coming from the front-end vehicle-mounted hydrogen storage cylinder group part; the second part is the hydraulic system 202, which is used for the pressure boosting and conduction of force between the first area and the third area of the energy storage bottle 2; the third part is the power boosting area 203, which is used to provide the external compression force for the entire energy storage bottle 2, that is, the balanced pressure in the energy storage and gas storage area 201;

[0027] The working principle of the specific energy storage bottle is as follows:

[0028] The pressure inside the front-end vehicle-mounted hydrogen storage cylinder group is detected in real time by the first pressure sensor 6 and is interlocked with the control system 1. When the control system 1 determines that the real-time pressure P1 detected by the first pressure sensor 6 inside the vehicle-mounted hydrogen storage cylinder group fluctuates greatly or the rise rate is too fast and exceeds the previous set value A, the control system 1 sends a signal to the third area of the energy storage bottle 2, and the power boosting area 203 does work on the hydraulic system 202. The pressure value of the hydraulic system 202 is P2 (P2 = P1 - 2) MPa, and the value of P2 changes in real-time interlock with P1; at this time, the hydraulic system 202 conducts the pressure value of P2 to the energy storage and gas storage area 201, and through the pressure and storage space conducted by the hydraulic system 202, the buffering and energy storage effects on the hydrogen in the front-end vehicle-mounted bottle are realized; when the hydrogen filling process of the vehicle-mounted bottle ends, the solenoid valve S-2 closes, and the hydrogen filling and energy storage processes of the entire vehicle-mounted hydrogen storage cylinder group are completed; the first safety valve 4, the solenoid valve S-3 and the first discharge port 5 cooperate to realize the pressure relief treatment of the vehicle-mounted bottle 3;

[0029] When the power supercharging area 203 receives a working instruction, the power supercharging area 203 starts to work, pressurizes the hydraulic system 202 through internal mechanical components such as piston connecting rods. After the hydraulic system 202 is pressurized, at this time, the pressure of the hydraulic system 202 > the pressure of the energy storage and gas storage area 201. The hydraulic system 202 does work on the metal diaphragm 204 (between the hydraulic system 202 and the energy storage and gas storage area 201), and the metal diaphragm deforms, thereby pressurizing the energy storage and gas storage area 201, and then realizing the functions of real-time regulating the pressure and supercharging of the energy storage and gas storage area 201;

[0030] The hydraulic system 202 and the energy storage and gas storage area 201 are isolated by the metal diaphragm 204 and realize the pressure conduction function;

[0031] Through the present utility model, the violent pressure fluctuation during the hydrogen filling process of the vehicle-mounted hydrogen storage bottle group can be reduced, the flow rate can be slowed down, and the safety and stability during the hydrogen filling process of the vehicle-mounted hydrogen storage bottle group can be improved through the energy storage and buffering functions of the energy storage bottle 2. At the same time, the hydrogen stored in the energy storage bottle 2 can also be reversely filled into the vehicle-mounted bottle 3 during the later use of hydrogen, realizing an effective supplement to the hydrogen storage capacity in the vehicle-mounted bottle 3, prolonging the single-use time of hydrogen in the vehicle-mounted bottle 3, and reducing the hydrogen filling frequency and times;

[0032] When the vehicle-mounted hydrogen storage bottle group is filled with hydrogen, at the beginning, the pressure difference is large, the pressure fluctuation of the gas is relatively large, and the hydrogen filling process is relatively unstable. At this time, the energy storage bottle 2 of the hydrogen storage bottle group can be used to distribute and absorb the pressure during the hydrogen filling process, store part of the hydrogen in the energy storage bottle 2, reduce the hydrogen filling amount and pressure in the front-end vehicle-mounted hydrogen storage bottle group, and realize a relatively stable hydrogen filling process;

[0033] At the same time, during the later use of hydrogen in the vehicle-mounted bottle 3, when a large amount of hydrogen is consumed and the pressure in the hydrogen storage bottle group is lower than the set value of the system, the hydrogen in the energy storage bottle 2 can be released into the vehicle-mounted hydrogen storage bottle group to effectively supplement the hydrogen in the vehicle-mounted hydrogen storage bottle group; the entire vehicle-mounted hydrogen storage bottle group is composed of multiple vehicle-mounted bottles 3 connected in series, and in addition, an energy storage bottle 2 is added for buffering and energy storage;

[0034] Through this method, the safety and stability during the hydrogen filling of the vehicle-mounted bottle 3 can be improved. At the same time, after the hydrogen in the vehicle-mounted hydrogen storage bottle group is used, the hydrogen in the energy storage bottle 2 can effectively supplement the hydrogen in the vehicle-mounted hydrogen storage bottle group.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vehicle-mounted hydrogen storage bottle group with energy storage and buffering functions, comprising a control system (1), an energy storage bottle (2) and a plurality of vehicle-mounted bottles (3), characterized in that: Two adjacent vehicle-mounted bottles (3) are connected in series in sequence. The vehicle-mounted bottles (3) are connected in series with the energy storage bottle (2). The energy storage bottle (2) and several vehicle-mounted bottles (3) are electrically connected to the control system (1) respectively. An electromagnetic valve S-2 is provided between the vehicle-mounted bottle (3) and the energy storage bottle (2). A first safety valve (4), an electromagnetic valve S-3 and a first pressure sensor (6) are externally connected between two vehicle-mounted bottles (3). The first safety valve (4) and the electromagnetic valve S-3 are both connected to the first discharge port (5). The electromagnetic valve S-2, the electromagnetic valve S-3 and the first pressure sensor (6) are all electrically connected to the control system (1) respectively.

2. The on-vehicle hydrogen storage cylinder group with energy storage and buffering functions according to claim 1, characterized in that: An electromagnetic valve S-1 is externally connected to a vehicle-mounted bottle (3) at one end far from the energy storage bottle (2). The electromagnetic valve S-1 is externally connected to a hydrogen filling pipeline.

3. The on-vehicle hydrogen storage cylinder group with energy storage and buffering functions according to claim 1, characterized in that: The energy storage bottle (2) includes an energy storage gas storage area (201), a hydraulic system (202) and a power boosting area (203). The energy storage gas storage area (201) is communicated with the power boosting area (203) through the hydraulic system (202). A metal diaphragm (204) is provided between the energy storage gas storage area (201) and the hydraulic system (202).

4. The vehicle-mounted hydrogen storage cylinder group with energy storage and buffering functions according to claim 3, characterized in that: A third pressure sensor (2011) is provided on the energy storage gas storage area (201). A second pressure sensor (2021) is provided on the hydraulic system (202). A fourth pressure sensor (2031) is provided at the bottom of the power boosting area (203). A fifth pressure sensor (2032) is provided at the top of the power boosting area (203). The third pressure sensor (2011), the second pressure sensor (2021), the fourth pressure sensor (2031) and the fifth pressure sensor (2032) are all electrically connected to the control system (1) respectively.

5. The on-vehicle hydrogen storage cylinder group with energy storage and buffering functions according to claim 3, wherein: A second safety valve (2012) is provided at the top of the energy storage gas storage area (201). The second safety valve (2012) is connected to the second discharge port (2013).

6. The on-vehicle hydrogen storage cylinder group with energy storage and buffering functions according to claim 3, characterized in that: A sewage discharge port (2022) is provided at the bottom of the outer wall of the hydraulic system (202).

Images