Liquid hydrogen energy recovery treatment device and vehicle

Abstract

The utility model relates to a liquid hydrogen energy recovery processing device and a vehicle. The liquid hydrogen energy recovery processing device comprises a liquid hydrogen module, a high-voltage power distribution module and a control module. The liquid hydrogen module comprises a liquid hydrogen storage tank and a buffer tank, liquid hydrogen in the liquid hydrogen storage tank is used for generating hydrogen when the vehicle is in a static state, and the buffer tank is used for storing the hydrogen; the high-voltage power distribution module is connected with the buffer tank and used for converting hydrogen into electric energy and storing the electric energy; and the control module is connected with the liquid hydrogen module and the high-voltage power distribution module and used for controlling the liquid hydrogen module to generate and store hydrogen when the vehicle is in a static state and controlling the high-voltage power distribution module to convert the hydrogen into electric energy and store the electric energy. The device is simple in structure, hydrogen evaporated when the vehicle-mounted liquid hydrogen system is stopped can be recycled, meanwhile, the situation that the cost of the whole vehicle is increased due to newly-added parts is avoided, and generated surplus electric quantity can be used for improving the performance of the whole vehicle and improving comfort according to the use condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell automobile technical field especially liquid hydrogen energy recovery processing device and vehicle. BACKGROUND

[0002] With the global energy crisis and the increasingly serious environmental problems, new energy automobile technology has been widely concerned and development. Fuel cell vehicle with its efficient, environmental protection, long cruising range and other advantages become the research hotspot. Among them, liquid hydrogen as the ideal fuel of fuel cell, high efficiency environmental protection, but its boiling point is very low, very easy to boil evaporation, cause a lot of hydrogen waste. However, the traditional liquid hydrogen energy recovery device structure is complex, and the cost is higher. SUMMARY

[0003] Therefore, it is necessary to provide a liquid hydrogen energy recovery processing device which can avoid hydrogen waste, has simple structure and low cost.

[0004] A liquid hydrogen energy recovery processing device, comprising:

[0005] A liquid hydrogen module, the liquid hydrogen module comprising a liquid hydrogen storage tank and a buffer tank, the liquid hydrogen in the liquid hydrogen storage tank being used to generate hydrogen gas in a vehicle stationary state, and the buffer tank being used to store hydrogen gas;

[0006] A high-voltage power distribution module connected with the buffer tank, used to convert hydrogen gas into electrical energy and store it;

[0007] A control module connected with the liquid hydrogen module and the high-voltage power distribution module respectively, used to control the liquid hydrogen module to generate hydrogen gas and store it in a vehicle stationary state, and control the high-voltage power distribution module to convert hydrogen gas into electrical energy and store it.

[0008] In one embodiment, the liquid hydrogen module further comprises:

[0009] A pressure sensor arranged in the liquid hydrogen storage tank, used to monitor pressure data in the liquid hydrogen storage tank;

[0010] A first safety valve, the inlet end of the first safety valve being connected with the liquid hydrogen storage tank, and the outlet end of the first safety valve being connected with the buffer tank;

[0011] The control module is used to open the first safety valve when the pressure data in the liquid hydrogen storage tank is greater than a pressure threshold, so that the hydrogen gas generated by the liquid hydrogen storage tank is discharged into the buffer tank, and control the high-voltage power distribution module to convert hydrogen gas into electrical energy and store it when the high-voltage power distribution module meets a recovery condition.

[0012] In one embodiment, the high-voltage power distribution module comprises an engine unit and a battery unit.

[0013] The control module is further configured to determine that the battery unit meets a recycling condition when the state of charge of the battery unit does not reach an alarm threshold, and to start the engine unit to convert the hydrogen into electric energy.

[0014] In one of the embodiments, the liquid hydrogen module further comprises:

[0015] The second safety valve has an inlet end connected to the outlet end of the first safety valve, and an outlet end connected to the external environment.

[0016] The control module is configured to open the first safety valve when the pressure data in the liquid hydrogen storage tank is greater than a pressure threshold, so that the hydrogen generated by the liquid hydrogen storage tank is discharged into the buffer tank, and to open the second safety valve when the high-voltage power distribution module does not meet the recycling condition, so that the hydrogen generated by the liquid hydrogen storage tank is discharged into the external environment.

[0017] In one of the embodiments, the high-voltage power distribution module comprises a battery unit.

[0018] The control module is further configured to determine that the battery unit meets a non-recycling condition when the state of charge of the battery unit reaches the alarm threshold, and to open the second safety valve.

[0019] In one of the embodiments, the high-voltage power distribution module comprises an engine unit, a controller unit and a battery unit.

[0020] The engine unit is connected to the buffer tank and configured to consume the hydrogen to generate electric energy.

[0021] The controller unit is connected to the engine unit and the battery unit respectively, and configured to distribute the electric energy generated by the engine unit, and to store or consume the electric energy through the battery unit.

[0022] In one of the embodiments, the control module comprises a hydrogen supply system control unit, a fuel and electric system control unit, a vehicle control unit and a battery system control unit connected to each other through a network link.

[0023] The hydrogen supply system control unit is connected to the liquid hydrogen module and configured to control the liquid hydrogen module to recycle the hydrogen.

[0024] The fuel and electric system control unit and the battery system control unit are connected to the high-voltage power distribution module respectively, and configured to control the high-voltage power distribution module to convert the hydrogen into electric energy and store the electric energy.

[0025] The vehicle control unit is configured to receive sensor signals of the hydrogen supply system control unit, the fuel and electric system control unit and the battery system control unit, and to perform vehicle power distribution control.

[0026] In one of the embodiments, the hydrogen supply system control unit, the fuel and electric system control unit, the vehicle control unit and the battery system control unit are connected to each other through a controller area network.

[0027] In one of the embodiments, the liquid hydrogen module comprises an evaporator.

[0028] In another aspect, the utility model also provides a vehicle comprising the liquid hydrogen energy recycling device of any one of the above device embodiments.

[0029] The liquid hydrogen energy recycling device recycles the evaporated hydrogen gas of the liquid hydrogen through the liquid hydrogen storage tank of the liquid hydrogen module when the liquid hydrogen vehicle is in a stationary state, without the need for a complex recycling device and additional pipelines; the hydrogen gas evaporated by the liquid hydrogen is converted into electric energy by the high-voltage power distribution module, avoiding the waste caused by the overpressure of the liquid hydrogen storage tank and the discharge of hydrogen gas into the external environment; at the same time, the generated electric energy is stored by the high-voltage power distribution module, so that the vehicle power distribution control is realized by the control module. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Fig. 1 is a structural schematic diagram of a liquid hydrogen energy recycling device according to an embodiment of the utility model;

[0031] Figure 2 Fig. 2 is a working principle schematic diagram of the liquid hydrogen energy recycling device according to the embodiment of the utility model.

[0032] REFERENCE NUMERALS:

[0033] 10, liquid hydrogen module; 110, liquid hydrogen storage tank; 120, buffer tank; 130, pressure sensor; 140, first safety valve; 150, second safety valve; 20, high-voltage power distribution module; 210, engine unit; 220, controller unit; 230, battery unit; 30, control module; 310, hydrogen supply system control unit; 320, vehicle control unit; 330, fuel cell system control unit; 340, battery system control unit. DETAILED DESCRIPTION

[0034] In order to make the above purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0035] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0037] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0039] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are merely used for the purpose of explanation and are not to be construed as limiting.

[0040] With the increasing severity of global energy crisis and environmental problems, new energy vehicle technology has been widely concerned and developed. Among them, fuel cell vehicles have become a research hotspot due to their high efficiency, environmental protection, long cruising range and other advantages. The core part of fuel cell vehicles is the fuel cell system, and liquid hydrogen as the ideal fuel of fuel cells, its system research and optimization has become a key issue.

[0041] Liquid hydrogen, as a highly efficient energy carrier, has high energy density and clean environmental characteristics, so it has a wide application prospect in the field of fuel cell vehicles. However, the physical properties of liquid hydrogen, especially its extremely low boiling point (-252.78℃), pose great challenges to the storage and transportation of liquid hydrogen.

[0042] Existing liquid hydrogen storage technology generally uses containers with good thermal insulation performance to store liquid hydrogen to slow down the evaporation rate of liquid hydrogen. However, due to the extremely low boiling point of liquid hydrogen, even under good thermal insulation conditions, liquid hydrogen is still prone to boiling and evaporation during storage. This evaporation will cause the pressure inside the storage container to gradually rise, and when the pressure exceeds the safety set value, in order to prevent the container from rupturing and ensure safety, the safety valve must be activated to discharge excess hydrogen to the external environment.

[0043] Although this hydrogen discharge mechanism can ensure the safety of liquid hydrogen storage, it also brings the following problems: the large amount of hydrogen discharge causes energy waste, reducing the energy utilization efficiency of fuel cell vehicles; the discharge of hydrogen increases the risk of hydrogen leakage, which may pose a threat to the environment and personal safety; frequent hydrogen discharge leads to accelerated wear of the safety valve, increasing maintenance costs and system instability.

[0044] The traditional liquid hydrogen energy recovery device cannot process hydrogen at room temperature when the vehicle is stationary, and convert it into electrical energy; and the hydrogen storage device has a complex structure, which requires the setting of additional low-temperature pressurization equipment or the use of special hydrogen storage materials, with high cost.

[0045] The utility model discloses to the above -mentioned problem provides a kind of liquid hydrogen energy recovery processing device, to improve the utilization of evaporated hydrogen effectively by innovative design and technical means, reduce hydrogen waste, improve the overall performance of liquid hydrogen storage system.The utility model recycles the evaporated hydrogen of liquid hydrogen when liquid hydrogen vehicle is parked, directly converts the hydrogen of liquid hydrogen evaporation into electric energy by fuel cell engine, avoids the waste caused by the overpressure of liquid hydrogen storage tank and the hydrogen discharge into external environment, stores the electric energy generated into power battery by high-voltage power distribution system, when power battery SOC (State of Charge, battery's state of charge, indicates the percentage of the electric quantity stored by battery under certain condition) reaches threshold value, hydrogen is discharged into external environment.In addition, the electric energy generated can be processed in the following mode according to the demand of whole vehicle:

[0046] 1, for low-voltage battery intelligent power supply, detect low-voltage battery voltage, convert the high-voltage electric energy generated by fuel cell engine into low-voltage electric energy by step-down DCDC to supplement the electric energy of low-voltage battery.

[0047] 2, for power battery precooling, in high-temperature area or summer, detect power battery temperature, use the electric quantity generated by fuel cell engine for battery water cooling unit to cool power battery, avoid power battery performance attenuation or power limitation when vehicle starts due to high temperature.

[0048] 3, for power battery preheating, in low-temperature area or winter, detect power battery temperature, use the electric quantity generated by fuel cell engine for battery water cooling unit or other mode electric heating to heat power battery, avoid power battery performance attenuation or power limitation when vehicle starts due to low temperature.

[0049] 4, for cab precooling, in high-temperature area or summer, detect cab temperature, use the electric quantity generated by fuel cell engine for cab air conditioner refrigeration to cool cab, improve comfort.

[0050] 5, for cab preheating, in low-temperature area or winter, detect cab temperature, use the electric quantity generated by fuel cell engine for cab air heater heating to heat cab, improve comfort.

[0051] In an exemplary embodiment, refer to Figure 1 , provide a kind of liquid hydrogen energy recovery processing device, including liquid hydrogen module 10, high-voltage power distribution module 20 and control module 30.

[0052] Liquid hydrogen module 10, liquid hydrogen module 10 includes liquid hydrogen storage tank 110 and buffer tank 120, liquid hydrogen in liquid hydrogen storage tank 110 is used to generate hydrogen in vehicle stationary state, buffer tank 120 is used to store hydrogen.

[0053] Optionally, the liquid hydrogen module 10 comprises a liquid hydrogen storage tank 110 and a buffer tank 120. Liquid hydrogen in the liquid hydrogen storage tank 110 will be evaporated to produce hydrogen gas due to its low boiling point when the vehicle is stationary, resulting in an increase in pressure in the liquid hydrogen storage tank 110. The high-pressure hydrogen gas in the liquid hydrogen storage tank 110 needs to be discharged from the tank. The buffer tank 120 is used to store the discharged hydrogen gas for use by the high-voltage power distribution module 20.

[0054] The high-voltage power distribution module 20 is connected to the buffer tank 120 and is used to convert hydrogen gas into electrical energy and store it.

[0055] Optionally, the high-voltage power distribution module 20 is connected to the buffer tank 120 of the liquid hydrogen module 10 and processes the hydrogen gas in the buffer tank 120 to convert hydrogen energy into electrical energy and store it.

[0056] The control module 30 is connected to the liquid hydrogen module 10 and the high-voltage power distribution module 20, respectively, and is used to control the liquid hydrogen module 10 to generate hydrogen gas and store it when the vehicle is stationary, and to control the high-voltage power distribution module 20 to convert hydrogen gas into electrical energy and store it.

[0057] Optionally, the control module 30 is connected to the liquid hydrogen module 10 and the high-voltage power distribution module 20, respectively, to control the liquid hydrogen storage tank 110 to release hydrogen gas and the buffer tank 120 to store the discharged hydrogen gas. The control module 30 controls the high-voltage power distribution module 20 to convert the discharged hydrogen gas into electrical energy and transmits the electrical energy generated by the high-voltage power distribution module 20 to the vehicle battery to achieve distribution and storage of electrical energy.

[0058] The above-mentioned liquid hydrogen energy recycling and processing device recycles the evaporated hydrogen gas of liquid hydrogen through the liquid hydrogen storage tank 110 of the liquid hydrogen module 10 when the liquid hydrogen vehicle is in a stationary state, without the need for complex recycling devices and additional pipelines. The high-voltage power distribution module 20 converts the hydrogen gas evaporated by the liquid hydrogen into electrical energy, avoiding waste caused by the discharge of hydrogen gas into the external environment due to overpressure in the liquid hydrogen storage tank 110. The high-voltage power distribution module 20 also stores the generated electrical energy, thereby achieving whole-vehicle power distribution control through the control module 30.

[0059] In an exemplary embodiment, referring to Figure 1 The liquid hydrogen module 10 further comprises a pressure sensor 130 and a first safety valve 140.

[0060] The pressure sensor 130 is arranged in the liquid hydrogen storage tank 110 and is used to monitor the pressure data in the liquid hydrogen storage tank 110.

[0061] The first safety valve 140 has an inlet end connected to the liquid hydrogen storage tank 110 and an outlet end connected to the buffer tank 120.

[0062] The control module 30 is configured to open the first safety valve 140 when the pressure data in the liquid hydrogen storage tank 110 is greater than the pressure threshold value, so that the hydrogen gas generated by the liquid hydrogen storage tank 110 is discharged into the buffer tank 120, and control the high-voltage power distribution module 20 to convert the hydrogen gas into electric energy and store the electric energy when the high-voltage power distribution module 20 meets the recycling condition.

[0063] For example, the liquid hydrogen in the liquid hydrogen storage tank 110 is evaporated by heat when the vehicle is stationary and not working, and hydrogen gas is generated. The liquid hydrogen storage tank 110 is connected with the first safety valve 140, so that when the pressure in the liquid hydrogen storage tank 110 is higher than a safety value, the high-pressure hydrogen gas in the liquid hydrogen storage tank 110 is discharged from the tank body. The liquid hydrogen storage tank 110 is internally provided with a pressure sensor 130 for monitoring the pressure in the liquid hydrogen storage tank 110.

[0064] The first safety valve 140 is connected with the inlet end of the buffer tank 120 through a hydrogen supply pipeline, and the outlet end of the buffer tank 120 is connected with the high-voltage power distribution module 20 through a pipeline. When the pressure in the liquid hydrogen storage tank 110 is higher than the safety value, the first safety valve 140 is opened. When the SOC of the power battery in the high-voltage power distribution module 20 is lower than the power battery SOC alarm threshold value (i.e., the recycling condition is met), the high-voltage power distribution module 20 is started to convert the hydrogen energy into electric energy. The buffer tank 120 stores and stabilizes the hydrogen gas input by the first safety valve 140.

[0065] In the above embodiment, by arranging the pressure sensor 130 and the first safety valve 140, the safety of hydrogen storage is ensured, and the pressure of the liquid hydrogen storage tank 110 caused by evaporation of liquid hydrogen is prevented from being too high. The control module 30 controls the high-voltage power distribution module 20 to convert the hydrogen gas into electric energy and store the electric energy when the high-voltage power distribution module 20 meets the recycling condition, which effectively avoids the waste of evaporated hydrogen gas and realizes the recycling of liquid hydrogen energy in the stationary state of the vehicle. The existing components on the vehicle are used for energy storage, which avoids adding new components and saves the cost of the vehicle.

[0066] In one example embodiment, please refer to Figure 1 The high-voltage power distribution module 20 includes an engine unit 210 and a battery unit 230.

[0067] The control module 30 is further configured to determine that the battery unit 230 meets the recycling condition when the state of charge of the battery unit 230 does not reach the alarm threshold value, and start the engine unit 210 to convert the hydrogen gas into electric energy.

[0068] Exemplarily, the engine unit 210 can be a fuel cell engine, and the battery unit 230 can be a power battery. The outlet end of the buffer tank 120 is connected to the engine unit 210 through a pipeline. When the internal pressure of the liquid hydrogen storage tank 110 is higher than a safety value, the first safety valve 140 is opened. When the SOC of the battery unit 230 is lower than a power battery SOC alarm threshold, the engine unit 210 is started to convert hydrogen energy into electric energy.

[0069] In the above embodiment, the hydrogen energy recovery condition is determined by the SOC of the power battery, so as to improve the hydrogen energy utilization efficiency and prevent hydrogen emission waste.

[0070] In an exemplary embodiment, referring to Figure 1 , the liquid hydrogen module 10 further comprises:

[0071] The second safety valve 150 has an inlet end connected to the outlet end of the first safety valve 140 and an outlet end connected to the external environment.

[0072] The control module is configured to open the first safety valve 140 when the pressure data in the liquid hydrogen storage tank 110 is greater than a pressure threshold, so that the hydrogen generated by the liquid hydrogen storage tank 110 is discharged into the buffer tank 120, and open the second safety valve 150 when the high-voltage power distribution module 20 does not meet the recovery condition, so that the hydrogen generated by the liquid hydrogen storage tank 110 is discharged into the external environment.

[0073] Exemplarily, the first safety valve 140 is connected to the inlet end of the second safety valve 150 through a hydrogen supply pipeline, and the outlet end of the second safety valve 150 is connected to the external environment through a pipeline. When the internal pressure of the liquid hydrogen storage tank 110 is higher than a safety value, the first safety valve 140 is opened. When the battery in the high-voltage power distribution module 20 is fully charged (i.e., does not meet the recovery condition), the second safety valve 150 is opened to discharge hydrogen into the external environment.

[0074] In the above embodiment, the first safety valve 140 and the second safety valve 150 are combined to control the hydrogen supply pipeline, so as to discharge excess hydrogen, control the pressure of the liquid hydrogen storage tank 110, and prevent the high-voltage power distribution module 20 from being overcharged.

[0075] In an exemplary embodiment, referring to Figure 1 , the high-voltage power distribution module comprises a battery unit 230.

[0076] The control module 30 is further configured to determine that the battery unit 230 meets the non-recovery condition when the state of charge of the battery unit 230 reaches an alarm threshold, and open the second safety valve 150.

[0077] Exemplarily, the battery unit 230 can be a power battery. When the internal pressure of the liquid hydrogen storage tank 110 is higher than a safety value, the first safety valve 140 is opened, and when the SOC of the power battery in the high-voltage power distribution module 20 is greater than a power battery SOC alarm threshold, the second safety valve 150 is opened, and the excess hydrogen is discharged into the external environment to prevent the power battery from being overcharged.

[0078] In an exemplary embodiment, referring to Figure 1 , the high-voltage power distribution module 20 includes an engine unit 210, a battery unit 230, and a controller unit 220.

[0079] The engine unit 210 is connected to the buffer tank 120 and is used to consume hydrogen to generate electric energy.

[0080] The controller unit 220 is connected to the engine unit 210 and the battery unit 230, respectively, and is used to distribute the electric energy generated by the engine unit 210 and store or consume the electric energy through the battery unit.

[0081] Exemplarily, the controller unit 220 can be a high-voltage all-in-one controller. The engine unit 210 is connected to the outlet end of the buffer tank 120 to consume hydrogen to generate electric energy, and the high-voltage interface end of the engine unit 210 is connected to the high-voltage all-in-one controller to distribute the generated electric energy to the whole vehicle; the battery unit 230 is connected to the high-voltage all-in-one controller and is used to store and provide electric energy.

[0082] In an exemplary embodiment, referring to Figure 1 , the control module includes a hydrogen supply system control unit 310, a whole vehicle control unit 320, a fuel and electric system control unit 330, and a battery system control unit 340 connected to each other through a network link.

[0083] The hydrogen supply system control unit 310 is connected to the liquid hydrogen module 10 and is used to control the liquid hydrogen module 10 to recover hydrogen.

[0084] The fuel and electric system control unit 330 and the battery system control unit 340 are connected to the high-voltage power distribution module 20, respectively, and are used to control the high-voltage power distribution module 20 to convert hydrogen into electric energy and store it.

[0085] The whole vehicle control unit 320 is used to receive sensor signals of the hydrogen supply system control unit 310, the fuel and electric system control unit 330, and the battery system control unit 340 and perform whole vehicle power distribution control.

[0086] Exemplarily, the control module 30 comprises a hydrogen supply system controller 310, a vehicle controller 320, a battery system controller 340, and a fuel cell system controller 330. The hydrogen supply system controller 310 is denoted as HMS (Hydrogen Mobility Solution), the vehicle controller 320 is denoted as HCU (Hybrid Control Unit), the fuel cell system controller 330 is denoted as FCU (Fuel Control Unit), and the battery system controller 340 is denoted as BMS (Battery Management System).

[0087] The hydrogen supply system controller 310 controls the liquid hydrogen system, collects the signals of the sensors related to the liquid hydrogen module 10, and feeds back the signals to the vehicle controller 320 to execute the instructions of the vehicle controller. The vehicle controller 320 is applied to the vehicle control. The fuel cell system controller 330 controls the fuel cell system, collects the signals of the sensors related to the fuel cell system, and feeds back the signals to the vehicle controller to execute the instructions of the vehicle controller. The battery system controller 340 controls the battery system, collects the signals of the sensors related to the battery system, and feeds back the signals to the vehicle controller to execute the instructions of the vehicle controller.

[0088] In the above embodiment, by means of the control units in the control module 30, various vehicle sensor information is received, effective control of the liquid hydrogen module 10 and the high-voltage power distribution module 20 is achieved, and the vehicle power distribution is completed to improve the performance of the vehicle.

[0089] In an exemplary embodiment, the hydrogen supply system control unit 310, the fuel cell system control unit 330, the vehicle control unit 320, and the battery system control unit 340 are connected to each other through a controller area network.

[0090] Exemplarily, CAN (Controller Area Network) is a multi-master communication bus designed for automobiles and other environments. CAN network is particularly suitable for high-interference environments, and due to its high reliability and low cost characteristics, it has been widely used in the field of automotive electronic control. With the development of technology, CAN network is also evolving, for example, CAN FD (CAN with Flexible Data-Rate) allows changing the bit rate of data segments to support higher data transmission rates.

[0091] In an exemplary embodiment, the liquid hydrogen module 10 comprises an evaporator.

[0092] Exemplarily, the liquid hydrogen module 10 is a key part for storing and supplying liquid hydrogen in a vehicle, and can further include a heater such as an evaporator, a safety device, an insulation and protection structure, etc. to ensure the safe and stable hydrogen supply of the liquid hydrogen module 10.

[0093] The following embodiments, in combination Figure 2 The working principle of the liquid hydrogen energy recycling device is specifically introduced.

[0094] In an exemplary embodiment, the working principle of the liquid hydrogen energy recycling device is as follows:

[0095] By collecting the pressure signal S101 in the liquid hydrogen bottle, the hydrogen pressure value is judged. When the pressure is lower than the second hydrogen pressure threshold value, the hydrogen supply system controller 310 sends a first safety valve closing signal S107 and a second safety valve closing signal S108.

[0096] When the hydrogen pressure value is greater than the second hydrogen pressure threshold value, the hydrogen pressure value is judged. When the pressure is not greater than the first hydrogen pressure threshold value, the S101 action is repeatedly executed.

[0097] The first hydrogen pressure threshold value is the alarm entering threshold pressure of the liquid hydrogen storage tank 110; the second hydrogen pressure threshold value is the alarm pushing out threshold pressure, which is set according to the pressure of the liquid hydrogen storage tank 110.

[0098] When the hydrogen pressure value is greater than or equal to the first hydrogen pressure threshold value, the SOC value of the power battery is collected, and it is judged whether the SOC value is greater than the SOC safety alarm threshold value. The SOC alarm threshold value is determined according to the matching power battery parameters, and can be set to 90%-95%.

[0099] When the power battery SOC is less than the power battery SOC safety threshold value, the vehicle controller issues a first safety valve opening signal S103 and a fuel cell engine start signal S104, and the S101 action is repeatedly executed.

[0100] When the power battery SOC is greater than or equal to the power battery SOC safety threshold value, the vehicle controller 320 issues a fuel cell engine shutdown signal S105 and a second safety valve opening signal S106, and the S101 action is repeatedly executed.

[0101] In the above embodiment, the evaporated hydrogen during parking of the liquid hydrogen can be used to start the fuel cell engine, convert the hydrogen gas that needs to be discharged into the surrounding environment into electric energy, and store it into the battery, thereby recycling the liquid hydrogen energy during parking of the vehicle; at the same time, the existing battery parts on the vehicle are used for energy storage, avoiding the addition of new parts and increasing the cost of the vehicle; the excess electric energy can also be used to improve the performance and comfort of the vehicle according to the use condition.

[0102] In one exemplary embodiment, the utility model also provides a kind of vehicle, comprising the liquid hydrogen energy recovery processing device of any one described in above device embodiment.

[0103] The technical features of the above embodiments can be combined arbitrarily, to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the description.

[0104] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A liquid hydrogen energy recovery and processing device, characterized in that, include: A liquid hydrogen module, comprising a liquid hydrogen storage tank and a buffer tank, wherein the liquid hydrogen in the liquid hydrogen storage tank is used to generate hydrogen gas when the vehicle is stationary, and the buffer tank is used to store the hydrogen gas; A high-voltage power distribution module, connected to the buffer tank, is used to convert the hydrogen into electrical energy and store it. The control module is connected to the liquid hydrogen module and the high-voltage power distribution module respectively. It is used to control the liquid hydrogen module to generate and store hydrogen when the vehicle is stationary, and to control the high-voltage power distribution module to convert the hydrogen into electrical energy and store it.

2. The liquid hydrogen energy recovery and processing device according to claim 1, characterized in that, The liquid hydrogen module also includes: A pressure sensor is installed inside the liquid hydrogen storage tank to monitor the pressure data inside the liquid hydrogen storage tank; A first safety valve, the inlet of which is connected to the liquid hydrogen storage tank, and the outlet of which is connected to the buffer tank; The control module is used to open the first safety valve when the pressure data in the liquid hydrogen storage tank is greater than the pressure threshold, so that the hydrogen generated by the liquid hydrogen storage tank is discharged into the buffer tank, and to control the high-voltage power distribution module to convert the hydrogen into electrical energy and store it when the high-voltage power distribution module meets the recovery conditions.

3. The liquid hydrogen energy recovery and processing device according to claim 2, characterized in that, The high-voltage power distribution module includes an engine unit and a battery unit; The control module is also used to determine that the battery cell meets the recycling conditions when the state of charge of the battery cell does not reach the alarm threshold, and to start the engine unit to convert the hydrogen into electrical energy.

4. The liquid hydrogen energy recovery and processing device according to claim 2, characterized in that, The liquid hydrogen module also includes: A second safety valve, the inlet of which is connected to the outlet of the first safety valve, and the outlet of which is connected to the external environment; The control module is configured to open the first safety valve when the pressure data in the liquid hydrogen storage tank is greater than the pressure threshold, so that the hydrogen generated by the liquid hydrogen storage tank is discharged into the buffer tank, and to open the second safety valve when the high-voltage power distribution module does not meet the recovery conditions, so that the hydrogen generated by the liquid hydrogen storage tank is discharged into the external environment.

5. The liquid hydrogen energy recovery and processing device according to claim 4, characterized in that, The high-voltage power distribution module includes a battery unit; The control module is also used to determine that the battery cell meets the non-recycling condition and open the second safety valve when the state of charge of the battery cell reaches the alarm threshold.

6. The liquid hydrogen energy recovery and processing device according to claim 1, characterized in that, The high-voltage power distribution module includes an engine unit, a controller unit, and a battery unit; The engine unit is connected to the buffer tank and is used to consume hydrogen to generate electricity. The controller unit is connected to the engine unit and the battery unit respectively, and is used to distribute the electrical energy generated by the engine unit and store or consume electrical energy through the battery unit.

7. The liquid hydrogen energy recovery and processing device according to claim 1, characterized in that, The control module includes a hydrogen supply system control unit, a fuel cell system control unit, a vehicle control unit, and a battery system control unit that are interconnected via network links. The hydrogen supply system control unit is connected to the liquid hydrogen module and is used to control the liquid hydrogen module to recover hydrogen. The gas-fired power system control unit and the battery system control unit are respectively connected to the high-voltage power distribution module, and are used to control the high-voltage power distribution module to convert hydrogen into electrical energy and store it; The vehicle control unit is used to receive sensor signals from the hydrogen supply system control unit, the fuel cell system control unit, and the battery system control unit to perform vehicle power distribution control.

8. The liquid hydrogen energy recovery and processing device according to claim 7, characterized in that, The hydrogen supply system control unit, the fuel cell system control unit, the vehicle control unit, and the battery system control unit are interconnected via a controller area network.

9. The liquid hydrogen energy recovery and processing device according to claim 1, characterized in that, The liquid hydrogen module includes an evaporator.

10. A vehicle, characterized in that, The liquid hydrogen energy recovery and processing device includes any one of claims 1-9.

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