Low-power-consumption cold and hot take-out box with self-heating starting function

Abstract

The invention relates to a low-power-consumption cold and hot take-out box with a self-heating starting function. The low-power-consumption cold and hot take-out box comprises a fuel cell unit and a take-out box body, the fuel cell unit comprises an electric pile capable of generating electric energy and an output port for outputting the electric energy generated by the electric pile; the take-out box body comprises a hot box and a cold box which are separated by a partition plate; the partition plate comprises a graphene layer and a semiconductor sheet which are adjacently arranged; at least one part of the graphene layer is adjacent to the fuel cell unit so as to obtain heat dissipation in the working process of the electric pile, and heat can be supplied to the hot box; the semiconductor chip is provided with a hot surface and a cold surface; heat can be obtained from a hot surface, and cold and hot temperature difference is utilized for power generation; a fan is further arranged in the cold box, and cold air cooled on the cold face can be blown away to the whole cold box.

Description

Technical Field

[0001] The present application belongs to the field of hydrogen energy technology applications, and in particular, relates to a low-power hot and cold takeout box with self-heating start. Background Art

[0002] A hydrogen vehicle refers to a mechatronic personal transportation vehicle that uses hydrogen energy as an auxiliary energy source based on an ordinary two-wheeled vehicle. The working logic of the existing two-wheeled hydrogen power system is mostly that when the system is started, the lithium battery in the system first powers the entire vehicle, and the hydrogen system is started synchronously. During this process, the hydrogen system and the lithium battery simultaneously supply power to the vehicle motor to move forward, or a single-battery range extender is used. However, due to the limitations of existing technology, after starting the hydrogen system, the internal fuel cell needs a period of time to increase the power to the maximum, so vehicles equipped with this system have the pain point of insufficient kinetic energy when the vehicle starts. The single-battery range extender has the pain point of not being able to be used uninterruptedly and insufficient energy supply for long-term high-intensity use.

[0003] In addition, with the rapid development of hydrogen-powered two-wheeled vehicles, the application scenarios of equipment using hydrogen-powered two-wheeled vehicles for food delivery are becoming more mature. However, there are problems such as poor insulation function of the food delivery box. Summary of the invention

[0004] In view of some deficiencies in the related art, the present application provides a low-power hot and cold takeout box with self-heating start. Specifically:

[0005] The low-power consumption hot and cold takeaway box with self-heating start includes a fuel cell unit and a takeaway box body; wherein,

[0006] The fuel cell unit includes a stack and an output port; wherein the stack is configured to generate electrical energy; and the output port is configured to output the electricity generated by the stack;

[0007] The takeaway box includes a hot box and a cold box that are adjacently arranged and separated by a partition; the partition includes a graphene layer and a semiconductor sheet that are adjacently arranged; relatively, the graphene layer is close to the hot box, and the semiconductor sheet is close to the cold box;

[0008] At least a portion of the graphene layer is adjacent to the fuel cell unit to obtain heat dissipation during operation of the fuel cell stack; the graphene layer is configured to provide heat for the heat box;

[0009] The semiconductor sheet has a hot surface facing the graphene layer and a cold surface facing the cold box; the semiconductor sheet is configured to obtain heat from the hot surface and generate electricity using the temperature difference between the cold surface and the hot surface;

[0010] A fan is also provided in the cold box, and the semiconductor chip is electrically connected to the fan to power the fan for rotation; the fan is configured to be able to blow the cold air cooled at the cold surface to the entire cold box, so that the air circulates in the cold box.

[0011] In one embodiment, the battery stack is provided with a first fin for heat dissipation extending from the inside to the outside of the battery stack, which can cool the battery stack in operation; at least a portion of the graphene layer is in contact with the first fin located outside the battery stack, so that the heat of the first fin diffuses into the graphene layer.

[0012] In one embodiment, the cold surface of the semiconductor chip is provided with a second fin, which extends to the inner wall of the cold box.

[0013] In one embodiment, the fuel cell unit further includes a FCU control module, which is configured to control the amount of electricity output by the fuel cell stack.

[0014] In one embodiment, the FCU control module is further configured to continuously collect a voltage level signal output by the fuel cell stack, and disconnect the power supply line when the voltage level output by the fuel cell stack exceeds a preset threshold.

[0015] In one embodiment, the fuel cell unit further includes a solid-state hydrogen storage tank connected to the fuel cell stack, capable of supplying hydrogen to the fuel cell stack to generate electricity; the solid-state hydrogen storage tank is replaceable.

[0016] In one embodiment, the fuel cell stack is adjacent to a solid-state hydrogen storage tank, so that the waste heat generated by the fuel cell stack during operation can heat the solid-state hydrogen storage tank.

[0017] In one embodiment, the output port of the fuel cell unit adopts a magnetic wireless charging terminal.

[0018] In one embodiment, the low-power hot and cold takeout box with self-heating startup also has an integrated MRD unit;

[0019] The integrated MRD unit includes two identical lithium batteries, namely a first lithium battery and a second lithium battery arranged in parallel; a first switch is provided at the charging end of the first lithium battery and a third switch is provided at the power supply end; a second switch is provided at the charging end of the second lithium battery and a fourth switch is provided at the power supply end; the first and second switches can be connected to the output port of the fuel cell unit respectively, and are configured to be able to switch with each other so that the fuel cell unit charges the first lithium battery or the second lithium battery; the third and fourth switches are connected to the power-consuming device respectively, and are configured to be able to switch with each other so that the first lithium battery or the second lithium battery can power the power-consuming device;

[0020] The integrated MRD unit also includes a BMS control module and a vehicle controller; wherein the BMS control module is configured to collect the power and voltage level signals of the two lithium batteries in real time and transmit them to the vehicle controller; the vehicle controller is configured to receive signals from the BMS control module to determine whether switching between the two lithium batteries is required, thereby controlling the opening and closing of the first, second, third, and fourth switches respectively.

[0021] In one embodiment, a DC / DC converter may be provided between the output port of the fuel cell unit and the two lithium batteries, and is configured to perform DC / DC conversion on the electricity from the fuel cell stack.

[0022] In one embodiment, the fuel cell stack is adjacent to a lithium battery, and the heat dissipated by the lithium battery during power consumption is provided to the fuel cell stack as an energy source for starting the membrane electrode in the fuel cell stack.

[0023] A second aspect of the present application provides a two-wheeled takeout vehicle equipped with a low-power hot and cold takeout box with self-heating start as described in any of the preceding embodiments.

[0024] At least one embodiment of the present application provides a low-power hot and cold takeout box with self-heating start, which can reasonably waste heat and achieve the effect of keeping warm and cold; in addition, it also has the advantages of long battery life, low carbon and environmental protection, and a wide range of application scenarios.

[0025] At least one embodiment of the present application provides a low-power hot and cold takeout box with self-heating start that can utilize waste heat and adopts semiconductors to control hot and cold temperatures. This solves the problem that when existing takeout boxes are used to hold takeout, the takeout is easily lost its original temperature due to various uncertain factors, resulting in its quality failing to meet customer requirements. It also solves the pain points of existing temperature-controlled takeout boxes, such as high energy consumption and the ease with which the improved solutions are affected by the ambient weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A schematic structural diagram of a two-wheeled vehicle in one embodiment;

[0028] Figure 2 A schematic diagram of a takeaway box in one embodiment;

[0029] In the figure: 1 fuel cell unit, 11 stack, 12 solid-state hydrogen storage tank, 13 fin, 14 output port, 15 FCU control module; 2 takeaway box, 21 hot box, 22 cold box, 23 partition, 24 graphene layer, 25 semiconductor sheet, 251 hot surface, 252 cold surface, 253 second fin, 26 fan, 27 display; 3 integrated MRD unit, 31 first lithium battery, 32 second lithium battery, 33 BMS control module, 34 vehicle controller. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The first embodiment of the present application provides a UBI (Uninterrupted Battery Life) dual-energy tube extended-range two-wheeled vehicle, such as Figure 1 and Figure 2As shown, the two-wheeled vehicle includes a fuel cell unit 1, a takeaway box 2 and an integrated MRD unit 3. The fuel cell unit 1 and the takeaway box 2 can form a low-power hot and cold takeaway box with self-heating start.

[0035] like Figure 1 As shown, the fuel cell unit 1 includes a fuel cell stack 11 (hereinafter referred to as the stack 11) and a solid-state hydrogen storage tank 12; wherein the stack 11 is configured to generate electrical energy and charge the lithium battery under normal working conditions. Specifically, on the one hand, the stack 11 is connected to the air and can obtain oxygen in the air; on the other hand, the stack 11 is connected to the solid-state hydrogen storage tank 12 and can obtain hydrogen; through the reaction of hydrogen and oxygen, electrical energy and heat are generated. The principle of the stack 11 generating electricity using oxygen and hydrogen belongs to the prior art and will not be described in detail here; for details, reference can also be made to the description of power generation disclosed in CN118769932A.

[0036] The fuel cell stack 11 is provided with first fins 13 for heat exchange extending from the inside of the fuel cell stack 11 to the outside, which can cool the fuel cell stack 11 in operation.

[0037] The solid hydrogen storage tank 12 stores hydrogen using solid hydrogen storage technology. The solid hydrogen storage tank 12 is connected to the battery stack 11 through a pipeline and can provide hydrogen for the battery stack 11. The specific implementation and control methods can also refer to other existing technologies, such as CN118769932A.

[0038] In one embodiment, the fuel cell stack 11 is adjacent to the solid hydrogen storage tank 12, so that the waste heat generated by the fuel cell stack 11 during operation can heat the solid hydrogen storage tank 12 and accelerate the hydrogen release efficiency.

[0039] The fuel cell unit 1 is provided with an output port 14, which is configured to output the electricity generated by the stack 11. In some embodiments, the output port 14 can be a magnetic wireless charging terminal; the device to be charged only needs to be gently magnetically attached to it to start charging; to a certain extent, the fuel cell unit 1 can be regarded as a larger "power bank".

[0040] The fuel cell unit 1 also includes an FCU control module 15, which is configured to control the amount of electricity output by the stack 11; for example, the amount of power generated by the stack is controlled by controlling the hydrogen output of the solid hydrogen storage tank 12, which may be partially referred to in CN118769932A.

[0041] In some embodiments, the FCU control module 15 is further configured to continuously collect a voltage level signal output by the fuel cell stack 11 , and disconnect the power supply line when the voltage level output by the fuel cell stack exceeds a preset threshold.

[0042] like Figure 2 As shown, the takeaway box 2 includes a hot box 21 and a cold box 22 arranged adjacent to each other, and a partition 23 is arranged between the two for separation. The hot box 21 can be used to store food that needs to be kept warm, such as stir-fried vegetables, noodles, etc., and the cold box 22 can be used to store food that needs to be kept cold, such as cold drinks, cakes, etc.

[0043] The partition 23 includes a graphene layer 24 and a semiconductor sheet 25 which are arranged adjacent to each other. Relatively speaking, the graphene layer 24 is close to the hot box 21 and away from the cold box 22; the semiconductor sheet 25 is close to the cold box 22 and away from the hot box 21; thus, the graphene layer 24 is located between the hot box 21 and the semiconductor sheet 25, and the semiconductor sheet 25 is located between the graphene layer 24 and the cold box 22.

[0044] The graphene layer 24 itself has good thermal conductivity, and is configured to provide heat for the hot box 21, so that the hot box 21 can provide enough heat to keep the food warm. At least a portion of the graphene layer 24 is adjacent to the fuel cell unit 1 and is in contact with the first fin 13 located outside the stack 11, so that the heat of the first fin 13 diffuses into the graphene layer 24, so that the stack 11 is cooled and the graphene layer 24 is heated. According to some experiments, the temperature of the first fin 13 can reach about 65°C, so the temperature of the graphene layer 24 can also be roughly heated to about 65°C. Since the graphene layer 24 is close to the hot box 21 and provides heat for it, the temperature of the hot box 21 can be roughly maintained at about 30°C.

[0045] The semiconductor chip 25 has a hot surface 251 facing the graphene layer 24 and a cold surface 252 facing the cold box 22. The semiconductor chip 25 is configured to obtain heat from the hot surface 251 and generate electricity using the temperature difference between the cold surface and the hot surface. The semiconductor chip 25 generates electricity using the existing PN junction temperature difference power generation technology, so this function can be achieved by purchasing commercially available semiconductor chips.

[0046] The cold box 22 is also provided with a fan 26, and the semiconductor chip 25 is electrically connected to the fan 26 to power the fan 26 for rotation. The fan 26 is configured to blow the cold air cooled at the cold surface 252 to the entire cold box 22, so that the air circulates in the cold box 22, thereby continuously reducing the temperature of the cold surface 252 until equilibrium is reached.

[0047] Furthermore, the cold surface 252 of the semiconductor chip is provided with a second fin 253, which is located in the cold box 22 and can extend on the inner wall of the cold box 22 (the side of the partition 23 close to the cold box 22). The wind circulating in the cold box 22 can cool the second fin 253 of the cold surface 252, thereby accelerating the cooling effect of the cold box 22.

[0048] According to some experiments, the temperature of the graphene layer 24 is approximately 65°C. At the beginning, the hot surface 251 of the semiconductor wafer can reach about 60°C, and the cold surface 252 is approximately at room temperature 20°C; after the semiconductor wafer 25 reaches dynamic equilibrium through the hot and cold temperature difference, the hot surface can be maintained at about 30°C, and the cold surface can be maintained at about 0°C; equilibrium can be reached in approximately 10 minutes.

[0049] In some embodiments, an LED display screen 27 may be further provided on the takeaway box 2, which is electrically connected to the semiconductor chip 25 to obtain electrical energy, thereby being able to display the temperatures of the hot box 21 and the cold box 22 of the takeaway box.

[0050] The takeaway box 2 can be a square relatively sealed space, and the shell can be made of aluminum alloy. A cover plate is provided on the top of the box, and an electronic lock is provided on the cover plate.

[0051] The graphene layer 24 in this embodiment can not only provide heat to the hot box 21, but also provide heat to the hot surface 251 of the semiconductor chip. Overall, the hot box 21 is heated by the graphene layer 24, and the cold box 22 is cooled by the second fin 253 on the cold surface of the semiconductor chip. The semiconductor chip 25 is electrically connected to the fan 26, and the electricity generated by the semiconductor chip 25 is provided to the fan 26 to provide power for the air circulation of the cold box 22, so that refrigeration occurs. Through such a setting, a takeaway box 2 that can keep warm and keep cold at the same time can be obtained, which provides a guarantee for maintaining the temperature of food in the takeaway industry; and it utilizes the waste heat of the battery stack 11, so on the one hand, it saves external energy supply, and on the other hand, it avoids the need to arrange additional lines for cooling waste heat, so that the energy consumption of the entire system is lower, and the line layout is simpler.

[0052] The working process of the takeaway box is as follows: during use, the two-wheeled vehicle needs to be started first, and the fuel cell stack 11 generates a large amount of heat (temperature is about 80°C) during the process of generating electricity using hydrogen. The first fin 13 is tightly attached to the surface of the fuel cell stack 11, and the thermal conductive tape of the superconducting graphene layer 24 is attached to the first fin 13. After a tight fit, the other end is attached to the hot surface 251 of the semiconductor chip in the takeaway box 2, providing thermal energy to the semiconductor chip 25, driving the semiconductor chip to start passive startup.

[0053] After receiving the heat energy of the graphene layer 24, the hot surface 251 of the semiconductor chip forms a natural temperature difference with the cold surface, causing the semiconductor chip 25 to start successfully and start to output electrical energy to the outside. The output electrical energy is used to power the fan 26 in the cold box 22, and the fan 26 starts to run. The fan 26 can be close to the cold surface 252 of the semiconductor chip. When the fan 26 starts to run, it will lower the temperature in the closed cold box 22, thereby deepening the temperature difference between the hot and cold sides of the semiconductor chip, causing the semiconductor chip to eventually approach the optimal performance and stabilize the temperature of the cold surface 252 at 0 degrees. In the hot box 21, the graphene layer 24 heats the interior of the takeaway box, and the temperature is stabilized at 30 degrees.

[0054] The walls of the hot and cold boxes are both made of heat-insulating cotton. When the semiconductor chip 25 reaches a balanced working state within 10 minutes, the cold surface 252 will continue to remain at a constant temperature of about 0 degrees, and the hot surface 251 will remain at a constant temperature of about 30 degrees, thereby achieving the physical effect of cold and heat existing in the same box at the same time.

[0055] At this time, the temperature sensors in the hot and cold boxes will transmit the hot box temperature and the cold box temperature values ​​to the LCD screen on the front panel of the box for real-time display. In addition, when the hot and cold boxes are working stably, the cooling fan in the cold box can be automatically cut off, and the hot and cold boxes will enter the hot insulation and cold insulation states without power consumption, thus achieving the design goal of ultra-low power consumption.

[0056] like Figure 1 As shown, the integrated MRD unit 3 (Manufacturing Ready Dicision) includes two identical lithium batteries, namely a first lithium battery 31 and a second lithium battery 32; the two are arranged in parallel and can switch to power the integrated MRD unit. The same at least includes: the same parameters such as battery cells, packs, and charge and discharge rates, so that the two can be interchangeable. The two interchangeable lithium batteries are the dual-energy tubes. The lithium battery can be a semi-solid lithium battery installed on a two-wheeled vehicle, such as a semi-solid lithium iron phosphate battery.

[0057] The first lithium battery 31 has a first switch K1 at the charging end and a third switch K3 at the power supply end; the second lithium battery 32 has a second switch K2 at the charging end and a fourth switch K4 at the power supply end. The first and second switches K1, K2 are respectively located between the fuel cell unit 1 and the lithium batteries 31, 32; the third and fourth switches K3, K4 are respectively located between the lithium batteries 31, 32 and the power-consuming devices of the two-wheeled vehicle, and the power-consuming devices include but are not limited to the motor for driving the wheels, the instrument panel for display, the lights, the control system, etc.

[0058] The first and second switches K1 and K2 can be connected to the output port 14 of the fuel cell unit 1 respectively, and the two switches are configured to be able to switch with each other so that the fuel cell unit 1 charges the first lithium battery 31 or the second lithium battery 32. The third and fourth switches K3 and K4 are connected to the power-consuming device respectively, and the two switches are configured to be able to switch with each other so that the first lithium battery 31 or the second lithium battery 32 supplies power to the power-consuming device. Such a setting can achieve uninterrupted battery life (UBI) of the lithium battery.

[0059] The integrated MRD unit 3 also includes a BMS (Battery Management System) control module 33 and a vehicle controller 34; the BMS control module 33 is configured to collect the power and voltage level signals of the two lithium batteries in real time and transmit them to the vehicle controller 34; the vehicle controller 34 is configured to receive signals from the BMS control module 33 to determine whether switching between the two lithium batteries is required, thereby controlling the opening and closing of the first, second, third, and fourth switches respectively.

[0060] A DC / DC converter may also be provided between the output port 14 of the fuel cell unit 1 and the two lithium batteries, which is configured to convert the power from the battery stack 11 into DC / DC and then deliver it to the lithium battery through the magnetic charging port.

[0061] In some embodiments, the fuel cell stack 11 is adjacent to the lithium batteries 31 and 32. The heat dissipated by the lithium batteries during power consumption is provided to the fuel cell stack 11 as an energy source for starting the membrane electrode in the fuel cell stack 11, thereby achieving passive starting, reducing heating devices and pipeline layout, and reasonably utilizing battery heat dissipation, so that the efficiency can be increased by 20% or more, and the economic benefits are better.

[0062] It can be understood that each module in the present application may include a memory, a processor, and a computer program stored in the memory and executable on the processor, which can realize the corresponding functions of each module.

[0063] The two-wheeled vehicle provided in this embodiment only needs to replace the hydrogen storage tank, so that the two semi-solid lithium iron phosphate batteries can alternately and continuously power the entire vehicle, which can meet the needs of uninterrupted use of the vehicle, ensure stable power, and can achieve a range of about 115km. The fuel cell unit adopts a modular design and is interconnected with the vehicle body through magnetic wireless fast charging, which can achieve rapid disassembly and assembly of the module. When a lithium battery is working, the fuel cell unit is performing compensatory input, which improves the endurance of the original battery and achieves an effective mileage of more than 2 times.

[0064] The two-wheeled vehicle provided in this embodiment can solve the pain points of the existing hydrogen system, such as insufficient power during startup and long-term operation, time required for power increase, inability to recycle waste heat, and need to stop for charging. The two-wheeled vehicle provided in this embodiment has stable power, improves the efficiency and service life of the fuel cell, and has the advantages of low carbon and environmental protection, efficient and time-saving hydrogen replenishment and replacement, etc., which can meet the application scenarios of most existing two-wheeled vehicles.

[0065] A second embodiment of the present application provides a control method for a UBI dual-energy tube extended-range two-wheeled vehicle (hereinafter referred to as a control method), wherein the two-wheeled vehicle is a UBI dual-energy tube extended-range two-wheeled vehicle as described in any of the above embodiments; the control method comprises the following steps:

[0066] S1: Before the vehicle is started, the first lithium battery 31 and the second lithium battery 32 are both fully loaded; the BMS control module 33 collects the power and voltage level signals of the two lithium batteries in real time and transmits them to the vehicle controller 34.

[0067] S2: When the vehicle starts, the vehicle controller 34 controls K3 to close, K1, K2 and K4 to open, and the first lithium battery 31 supplies power to the power-consuming device (such as the motor); when the remaining power of the first lithium battery 31 reaches the first threshold, K1 is closed, the fuel cell unit 1 is started, and the stack 11 starts to generate electricity to charge the first lithium battery 31; at this time, the first lithium battery 31 is charged and powered at the same time. The first threshold selects 70-80% of the total power of the first lithium battery 31, for example, it can be 70%, 75%, 80%, etc. The higher first threshold is selected because charging starts at 80% remaining power, and there is 60% of the remaining power in the battery, which can give full play to the efficiency of the lithium battery charging and discharging at the same time; if the threshold is too high, it is easy to be filled too quickly, considering the situation that the Meituan takeaway car needs to stop to deliver food; if the threshold is too low, it may be because the battery is already low in winter, resulting in too slow charging, and the situation of insufficient charging and discharging occurs.

[0068] S3: When the solid-state hydrogen storage tank 12 is exhausted, the first lithium battery 31 continues to be used for power supply. When the remaining power reaches the second threshold, it enters the low power maintenance state; at this time, the solid-state hydrogen storage tank 12 is replaced, K1 is kept closed, K2 is opened, K3 is switched to open, K4 is closed, the fuel cell unit 1 charges the first lithium battery 31, and the second lithium battery 32 starts to supply power to the power-consuming equipment. The second threshold selects 20-30% of the total power of the first lithium battery 31, for example, 20%, 25%, 30%, etc.; so that the lithium battery will not be over-consumed and can enter the low power maintenance state.

[0069] S4: When the remaining power of the second lithium battery 32 reaches the second threshold, it enters the low power maintenance state; at this time, the first lithium battery 31 has been charged to full load; at this time, control K1 to open, K3 to close, K2 to close, K4 to open, and switch to the first lithium battery 31 to power the power-consuming equipment, and the fuel cell unit 1 to charge the second lithium battery 32.

[0070] S5: When the remaining power of the first lithium battery 31 reaches the second threshold, it enters the low power maintenance state; at this time, the second lithium battery 32 has been charged to full load; at this time, control K2 to open, K4 to close, K1 to close, K3 to open, and switch to the second lithium battery 32 to power the power-consuming equipment, and the fuel cell unit 1 to charge the first lithium battery 31.

[0071] S6: Repeat steps S4 and S5, and by replacing the solid hydrogen storage tank, the vehicle can achieve uninterrupted cruising.

[0072] In one embodiment, when the vehicle is started in S2, the first lithium battery 31 generates heat in the process of consuming power from full load to a first threshold; since the battery stack 11 is adjacent to the lithium battery, the heat is provided to the battery stack 11 as an energy source for starting the membrane electrode of the battery stack 11.

[0073] In the control method provided in this embodiment, when any lithium battery is working, the fuel cell unit 1 is performing compensatory input, thereby improving the endurance of the original battery and achieving an effective mileage of more than twice.

[0074] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] The above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution requested for protection in the present application.

Claims

1. A low-power hot and cold takeaway box with self-heating start, characterized in that: It includes a fuel cell unit and a takeaway box; wherein, The fuel cell unit includes a stack and an output port; wherein the stack is configured to generate electrical energy; and the output port is configured to output the electricity generated by the stack; The takeaway box includes a hot box and a cold box that are adjacently arranged and separated by a partition; the partition includes a graphene layer and a semiconductor sheet that are adjacently arranged; relatively, the graphene layer is close to the hot box, and the semiconductor sheet is close to the cold box; At least a portion of the graphene layer is adjacent to the fuel cell unit to obtain heat dissipation during operation of the fuel cell stack; the graphene layer is configured to provide heat for the heat box; The semiconductor sheet has a hot surface facing the graphene layer and a cold surface facing the cold box; the semiconductor sheet is configured to obtain heat from the hot surface and generate electricity using the temperature difference between the cold surface and the hot surface; A fan is also provided in the cold box, and the semiconductor chip is electrically connected to the fan to power the fan for rotation; the fan is configured to be able to blow the cold air cooled at the cold surface to the entire cold box, so that the air circulates in the cold box.

2. The takeaway box according to claim 1, characterized in that: The battery stack is provided with a first fin for heat dissipation extending from the inside to the outside of the battery stack, which can cool the battery stack in operation; at least a portion of the graphene layer is in contact with the first fin located outside the battery stack, so that the heat of the first fin is diffused into the graphene layer.

3. The takeaway box according to claim 1, characterized in that: The cold surface of the semiconductor chip is provided with a second fin, which extends to the inner wall of the cold box.

4. The takeaway box according to any one of claims 1 to 3, characterized in that: The fuel cell unit also includes a solid-state hydrogen storage tank connected to the fuel cell stack, which can supply hydrogen to the fuel cell stack to generate electricity; the solid-state hydrogen storage tank is replaceable.

5. The takeaway box according to claim 4, characterized in that: The battery stack is adjacent to the solid-state hydrogen storage tank, so that the waste heat generated when the battery stack is working can heat the solid-state hydrogen storage tank.

6. The takeaway box according to claim 4, characterized in that: The fuel cell unit also includes an FCU control module, which is configured to control the amount of electricity output by the stack and to continuously collect a voltage level signal output by the stack, and disconnect the power supply line when the voltage level output by the stack exceeds a preset threshold.

7. The takeaway box according to any one of claims 1 to 3, characterized in that: The output port of the fuel cell unit adopts a magnetic wireless charging terminal.

8. The takeaway box according to any one of claims 1 to 3, characterized in that: It also features an integrated MRD unit; The integrated MRD unit includes two identical lithium batteries, namely a first lithium battery and a second lithium battery arranged in parallel; a first switch is provided at the charging end of the first lithium battery and a third switch is provided at the power supply end; a second switch is provided at the charging end of the second lithium battery and a fourth switch is provided at the power supply end; the first and second switches can be connected to the output port of the fuel cell unit respectively, and are configured to be able to switch with each other so that the fuel cell unit charges the first lithium battery or the second lithium battery; the third and fourth switches are connected to the power-consuming device respectively, and are configured to be able to switch with each other so that the first lithium battery or the second lithium battery can power the power-consuming device; The integrated MRD unit also includes a BMS control module and a vehicle controller; wherein the BMS control module is configured to collect the power and voltage level signals of the two lithium batteries in real time and transmit them to the vehicle controller; the vehicle controller is configured to receive signals from the BMS control module to determine whether switching between the two lithium batteries is required, thereby controlling the opening and closing of the first, second, third, and fourth switches respectively.

9. The takeaway box according to claim 8, characterized in that: A DC / DC converter is provided between the output port of the fuel cell unit and the two lithium batteries, and is configured to be able to perform DC / DC conversion on the electricity from the fuel cell stack.

10. The takeaway box according to claim 1, characterized in that: The battery stack is adjacent to the lithium battery, and the heat dissipated by the lithium battery during power consumption is provided to the battery stack as an energy source for starting the membrane electrode in the battery stack.

11. A two-wheeled vehicle for food delivery, characterized in that: A low-power hot and cold takeout box with self-heating start is provided.

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