A mobile dining car and low-voltage power supply energy storage device of the mobile dining car
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ROYPOW TECH CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-26
Smart Images
Figure CN224418449U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of power supply technology for mobile food carts, and particularly relates to a mobile food cart and a low-voltage power supply energy storage device for mobile food carts. Background Technology
[0002] In recent years, due to the fast pace of life, office workers have relatively less free time and often feel unsure about what to eat for three meals a day. Therefore, the emergence of mobile food trucks has solved the problem of inconvenient dining for many office workers. Because mobile food trucks have advantages such as low investment, quick returns, freshly prepared food, good taste, low prices, and high mobility, they are a great choice for those with fast-paced work lives.
[0003] Existing mobile food trucks on the market are generally expensive to manufacture, have limited functionality, and high operating costs. Different user groups require different functions and styles of products. For example, some users need more comprehensive functions but also have high quality requirements, but both the selling price and operating costs are high. In this case, it's difficult to maintain competitiveness with low- and mid-range consumers. Therefore, it's believed that combining photovoltaic energy storage with food trucks can significantly reduce operating costs and better meet market demands. Utility Model Content
[0004] One embodiment of this application provides a mobile food cart and a low-voltage power supply energy storage device for the mobile food cart, in order to solve the problems of high cost and poor power supply security of existing mobile food carts.
[0005] In a first aspect, one embodiment of this application provides a low-voltage power supply energy storage device for a mobile food cart, comprising:
[0006] Two sets of power supply modules are connected to the mains power and the renewable energy board, and each set of power supply modules is used to provide the first power source;
[0007] Energy storage modules are used for energy storage and to provide a second power source;
[0008] Two sets of energy conversion modules are used to step down the first power supply provided by the power supply module to provide power for charging the energy storage module, and to step up the second power supply provided by the energy storage module to output a third power supply; each set of energy conversion modules is connected to the energy storage module;
[0009] An output module is connected to a load, and the output module is used to output the third power supply to the load; each group of energy conversion modules is also connected to the output module;
[0010] A leakage current protection module is connected between each group of energy conversion modules and the output module. The leakage current protection module is used to protect the load from leakage current.
[0011] The two sets of power supply modules are referred to as the first power supply module and the second power supply module, and the two sets of energy conversion modules are referred to as the first energy conversion module and the second energy conversion module. The input terminals of the first power supply module and the second power supply module are respectively connected to the mains power and the renewable energy board. The output terminal of the first power supply module is connected to the first energy conversion module, and the output terminal of the second power supply module is connected to the second energy conversion module.
[0012] Optionally, the low-voltage power supply energy storage device of the mobile food cart also includes a main control module, which is also connected to the energy storage module.
[0013] Optionally, the low-voltage power supply energy storage device of the mobile food cart further includes a first detection module and a second detection module; the first detection module is connected between the main control module and the two sets of energy conversion modules, and the first detection module is used to detect the voltage of the energy storage module providing the second power supply to the energy conversion module; the second detection module is connected between the main control module and the leakage protection module, and the second detection module is used to detect the leakage current of the leakage protection module.
[0014] Optionally, the low-voltage power supply energy storage device of the mobile food cart also includes a relay and an emergency stop switch element. The first end of the relay is connected to the energy storage module through the emergency stop switch element, and the second end of the relay is connected to the first energy conversion module and the second energy conversion module respectively.
[0015] Optionally, the emergency stop switch element is a mechanical switch.
[0016] Optionally, the renewable energy panel is a photovoltaic panel.
[0017] Optionally, the energy storage module includes multiple energy storage elements connected in parallel.
[0018] Optionally, the energy storage element is a battery.
[0019] Optionally, each group of energy conversion modules includes an inverter; and / or, the leakage protection module includes a leakage current protector.
[0020] Secondly, one embodiment of this application provides a mobile food cart, including the low-voltage power supply energy storage device for the mobile food cart described above.
[0021] One embodiment of this application provides a mobile food cart and a low-voltage power supply and energy storage device for the mobile food cart. The low-voltage power supply and energy storage device for the mobile food cart includes two sets of power supply modules connected to mains power and a renewable energy board, each set of power supply modules providing a first power source; an energy storage module for energy storage and providing a second power source; two sets of energy conversion modules for stepping down the first power source provided by the power supply modules to provide power for charging the energy storage modules, and for stepping up the second power source provided by the energy storage modules to output a third power source; each set of energy conversion modules is connected to the energy storage modules; and an output module is connected to a load. The system provides a third power supply to the load; each energy conversion module is also connected to the output module; a leakage protection module is connected between each energy conversion module and the output module to protect against leakage current from the load; the two power supply modules are designated as the first power supply module and the second power supply module, and the two energy conversion modules are designated as the first energy conversion module and the second energy conversion module. The input terminals of the first and second power supply modules are connected to the mains power and the renewable energy board, respectively; the output terminal of the first power supply module is connected to the first energy conversion module, and the output terminal of the second power supply module is connected to the second energy conversion module. This mobile food cart's low-voltage power supply and energy storage device uses a renewable energy board as the power supply module, replacing oil with renewable electricity, significantly reducing operating costs. The energy stored in the energy storage module meets the needs of long-term operation, with a maximum power of 10kW to meet the power requirements of high-power appliances; and the multiple protections added by the leakage protection module make its use safer, solving the problems of high cost and poor power supply security in existing mobile food carts.
[0022] This mobile food truck uses a low-voltage power storage device with renewable energy panels as its power supply module, replacing traditional oil with renewable electricity. It can achieve zero-cost operation through photovoltaic power generation. To meet different energy and power requirements, the number of energy storage components in the storage module can be increased. Simultaneously, a leakage protection module is added to provide emergency stop, rapid power-off, and leakage current detection protection functions to cope with harsh external working environments, greatly increasing the safety factor of the mobile food truck. Attached Figure Description
[0023] To more clearly illustrate the technical solution in one embodiment of this application, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0024] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.
[0025] Figure 1 A circuit diagram of a low-voltage power supply energy storage device for a mobile food cart provided in one embodiment of this application. Detailed Implementation
[0026] The technical solution of one embodiment of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0027] One embodiment of this application provides a mobile food cart and a low-voltage power supply energy storage device for the mobile food cart, in order to solve the problems of high cost and poor power supply security of existing mobile food carts.
[0028] Example 1:
[0029] One embodiment of this application provides a low-voltage power supply and energy storage device for a mobile food cart. For an example, please refer to [link to example]. Figure 1 .
[0030] like Figure 1 As shown, this utility model application provides a low-voltage power supply and energy storage device for a mobile food cart, including a power supply module 10, an energy storage module 20, an energy conversion module 30, an output module 40, and a leakage protection module 50. The low-voltage power supply and energy storage device for the mobile food cart is equipped with two sets of power supply modules 10 and two sets of energy conversion modules 30.
[0031] like Figure 1 As shown, in the embodiments of this utility model, each power supply module is connected to the mains power and the renewable energy board, and each power supply module 10 is used to provide a first power source.
[0032] Furthermore, the renewable energy panel can be a photovoltaic panel. The photovoltaic panel is used to charge the energy storage module 20 during sunny days, which can significantly reduce the operating costs of the mobile food cart.
[0033] like Figure 1 As shown in the embodiment of this utility model, the energy storage module 20 is used for energy storage and providing a second power source. The energy storage module 20 includes multiple energy storage elements BAT connected in parallel.
[0034] Furthermore, the energy storage element BAT can be selected as a battery. In this embodiment, the energy storage module 20 includes six energy storage elements BAT connected in parallel.
[0035] like Figure 1As shown, in the embodiments of the present utility model, the energy conversion module 30 is used to step down the first power supply provided by the power supply module 10 to provide power for charging the energy storage module 20, and to step up the second power supply provided by the energy storage module 20 to output a third power supply; each energy conversion module 30 is connected to the energy storage module 20.
[0036] Furthermore, each energy conversion module 30 includes an inverter. The inverter is used to convert energy in the low-voltage power supply energy storage system of the mobile food cart. The first power source, provided by the high-voltage DC photovoltaic panel, can be stepped down to 51V via the inverter's DC-DC converter to charge the battery of the energy storage module 20. Alternatively, the second power source, provided by the battery of the energy storage module 20, can be boosted by the inverter's DC-DC converter and then DC-AC inverted to output AC power as a third power source. Or, mains power can be stepped down to 51V via the inverter's AC-DC converter to charge the battery of the energy storage module 20. In this embodiment, the mains power can also be replaced by a 48V generator, coupled to the vehicle's original engine via a pulley to output a voltage of 40V–57.6V to charge the lithium battery of the 48V energy storage module 20. Controllable charging of the mobile food cart or idling charging can also be achieved by adjusting the generator's start / stop.
[0037] like Figure 1 As shown, in an embodiment of the present invention, the output module 40 is connected to the load and is used to output a third power supply to the load; each energy conversion module 30 is also connected to the output module 40.
[0038] like Figure 1 As shown, in an embodiment of the present invention, a leakage protection module 50 is connected between each energy conversion module 30 and the output module 40, and the leakage protection module 50 is used to protect the load from leakage.
[0039] Furthermore, the leakage protection module 50 includes a leakage current protector. The leakage current protector is used to detect the leakage current of the live wire and neutral wire to ground on the AC load side. When the leakage current is too large, it disconnects the circuit between the energy conversion module 30 and the output module 40 to prevent leakage. It can also effectively protect human safety from electric shock caused by rain or harsh environments.
[0040] like Figure 1 As shown in the embodiments of this utility model, the two sets of power supply modules are referred to as the first power supply module and the second power supply module, and the two sets of energy conversion modules are referred to as the first energy conversion module and the second energy conversion module. The input terminals of the first power supply module and the second power supply module are respectively connected to the mains power and the renewable energy board. The output terminal of the first power supply module is connected to the first energy conversion module, and the output terminal of the second power supply module is connected to the second energy conversion module.
[0041] Furthermore, the low-voltage power supply and energy storage device of this mobile food truck uses a renewable energy panel as the power supply module 10 to replace traditional oil with renewable electricity, achieving zero-cost operation through photovoltaic power generation. To meet different energy and power requirements, the number of energy storage elements in the energy storage module 20 can be increased. Simultaneously, a leakage protection module 50 is added to provide emergency stop, rapid power-off, and leakage current detection and protection functions to cope with harsh external working environments, greatly increasing the safety factor of the mobile food truck.
[0042] An embodiment of this application provides a low-voltage power supply and energy storage device for a mobile food cart, comprising two sets of power supply modules connected to mains power and a renewable energy board, each set of power supply modules providing a first power source; an energy storage module for energy storage and providing a second power source; two sets of energy conversion modules for stepping down the first power source provided by the power supply modules to provide power for charging the energy storage modules, and stepping up the second power source provided by the energy storage modules to output a third power source; each set of energy conversion modules is connected to the energy storage module; an output module connected to the load, the output module being used to output the third power source to the load; each set of energy conversion modules is also connected to the output module; a leakage protection module is connected between each set of energy conversion modules and the output module, the leakage protection module being used to protect against leakage current from the load; wherein, the two sets of power supply modules are referred to as the first power supply module and the second power supply module, and the two sets of energy conversion modules are referred to as the first energy conversion module and the second energy conversion module, the input terminals of the first power supply module and the second power supply module are respectively connected to the mains power and the renewable energy board, the output terminal of the first power supply module is connected to the first energy conversion module, and the output terminal of the second power supply module is connected to the second energy conversion module. The low-voltage power supply and energy storage device of this mobile food truck uses renewable energy panels as power supply modules to replace oil with renewable electricity, greatly reducing the cost of use. The power of the energy storage module meets the needs of long-term operation, with a maximum power of 10kW to meet the power requirements of high-power appliances. The addition of a leakage protection module adds multiple protections to make it safer to use, solving the problems of high cost and poor power supply security of existing mobile food trucks.
[0043] Furthermore, the low-voltage power supply and energy storage device of this mobile food truck can meet the needs of long-term operation by using up to 6 battery packs of 5KWH 51.2V each, totaling 30 kWh of power.
[0044] like Figure 1 As shown, in one embodiment of the present invention, the low-voltage power supply energy storage device of the mobile food cart further includes a main control module (EMS), which is also connected to the energy storage module 20.
[0045] Furthermore, the main control module EMS also communicates with the energy storage module 20 via CAN communication. The main control module EMS includes a control panel for displaying control data and managing energy, primarily used for communication with the battery and inverter, data uploading, and control distribution. It has built-in GPS, Bluetooth, and 4G modules, enabling remote monitoring and online upgrades via a mobile app.
[0046] like Figure 1 As shown, in one embodiment of the present invention, the low-voltage power supply energy storage device of the mobile food cart further includes a first detection module 60 and a second detection module 70; the first detection module 60 is connected between the main control module EMS and the two sets of energy conversion modules 30, and the first detection module 60 is used to detect the voltage of the energy storage module 20 providing the second power supply to the energy conversion module 30; the second detection module 70 is connected between the main control module EMS and the leakage protection module 50, and the second detection module 70 is used to detect the leakage current of the leakage protection module 50.
[0047] like Figure 1 As shown, in one embodiment of the present invention, the low-voltage power supply energy storage device of the mobile food cart includes a relay 70 and an emergency stop switch element 90. The first end of the relay 70 is connected to the energy storage module 20 through the emergency stop switch element 90, and the second end of the relay 20 is connected to the first energy conversion module and the second energy conversion module respectively.
[0048] Furthermore, the emergency stop switch element 90 can be a mechanical switch. The relay 80 and the emergency stop switch element 90 are used to control the rapid power cut-off of the inverter's battery side, for manual power cut-off in emergency situations. In this embodiment, the first detection module 60 detects the inverter's battery-side voltage, controls the emergency stop switch element 90 to start (e.g., manually start), or detects the relay tripping and the signal changing from a high-level signal to a low-level signal, and uploads the detected signal to the main control module EMS. At this time, the main control module EMS quickly determines and shuts down the battery and inverter. The second detection module 70 detects when the leakage current of the leakage current protector is too high, and then the main control module EMS sends a command to the inverter to shut down and issue an alarm. The first detection module 60 can be a voltage sensor or a voltage transformer. The second detection module 70 can be a current sensor or a current transformer.
[0049] In the embodiments of this utility model, the working principle of the low-voltage power supply energy storage device of the mobile food cart is as follows: the main control module EMS controls the emergency stop switch element 90 to start the battery output of the energy storage membrane 20 at 51.2V. The battery supplies 51.2V to the main control module EMS to enable it to work normally. At the same time, the relay 80 closes when the first detection module 60 detects that the voltage is greater than 35V. At this time, there is a voltage of 51.2V on the battery side of the two sets of energy conversion modules 30, and the energy conversion modules 30 work. The main control module EMS, energy storage module 20, and energy conversion module 30 are all powered on. After the main control module EMS detects that the communication between the energy storage module 20 and the energy conversion module 30 is normal and there are no abnormal alarms through the first detection module 60, when the remaining SOC of the battery in the energy storage module 20 is greater than 10%, the output module 40 outputs AC power off-grid to power the electrical appliances. At this time, the second detection module 70 detects the leakage current to ground through the live wire L and neutral wire N of the AC power output terminal of the leakage protection module 50. If the leakage current exceeds the threshold, the leakage protection module 50 is controlled to not work, the circuit between the energy conversion module 30 and the output module 40 is disconnected, and the output signal is transmitted from a 5V high level signal to a -0V low level signal to the main control module EMS. The main control module EMS controls the energy conversion module 30 to shut down and alarms. If the leakage current detection is normal, the low-voltage power supply energy storage device of the mobile catering vehicle is controlled to work normally.
[0050] To further clarify, during normal operation, if the remaining SOC of the energy storage module 20's battery is greater than 10%, and a renewable energy board is providing power, the energy PV provided by the renewable energy board will prioritize supplying the load. If there is remaining energy, it will continue to charge the battery of the energy storage module 20. If the energy PV provided by the renewable energy board is insufficient to supply the load, the remaining energy will be supplied by the battery of the energy storage module 20. If the remaining SOC of the energy storage module 20's battery is less than 10%, the energy conversion module 30 will not start AC output. At this time, the energy PV provided by the renewable energy board or the grid generator (such as mains power) will also prioritize charging the battery of the energy storage module 20 until the remaining SOC of the energy storage module 20's battery is greater than 10%, at which point the energy conversion module 30 will continue to output AC power. In this case, the energy PV provided by the renewable energy board and the grid energy will prioritize charging the battery of the energy storage module 20 until the remaining SOC of the battery is greater than 20%, at which point it will prioritize supplying power to the load. In case of any abnormal situation during use, the emergency stop switch element 90 can be closed. At this time, the power supply to the relay 80 is cut off, disconnecting the battery-side voltage of the energy conversion module 30. Simultaneously, the main control module EMS detects through the first detection module 60 that the battery-side voltage of the energy conversion module 30 has dropped from 51V to 0V, and the signal changes from 5V high level to 0V low level and is transmitted to the main control module EMS. At this time, the main control module EMS sends a command to the energy storage module 20 and the energy conversion module 30, causing them to quickly issue a shutdown command to shut down. If heavy rain or electric shock occurs during use, the leakage current protection module 50 detects excessive leakage current and transmits a signal from 5V high level to 0V low level to the main control module EMS. At this time, the main control module EMS quickly issues a command to the leakage current protection module to shut down, making the mobile food cart safer to use.
[0051] Example 2:
[0052] This utility model application provides a mobile food cart, including the aforementioned low-voltage power supply and energy storage device for the mobile food cart.
[0053] It should be noted that the details of the low-voltage power supply and energy storage device of the mobile food cart in this embodiment have been described in Embodiment 1, and the specific details of the low-voltage power supply and energy storage device of the mobile food cart will not be described again in this embodiment.
[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0055] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.
[0056] The low-voltage power supply and energy storage device for a mobile food cart provided in one embodiment of this application has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A low-voltage power supply and energy storage device for a mobile food cart, characterized in that, include: Two sets of power supply modules are connected to the mains power and the renewable energy board, and each set of power supply modules is used to provide the first power source; Energy storage modules are used for energy storage and to provide a second power source; Two sets of energy conversion modules are used to step down the first power supply provided by the power supply module to provide power for charging the energy storage module, and to step up the second power supply provided by the energy storage module to output a third power supply; each set of energy conversion modules is connected to the energy storage module; An output module is connected to a load, and the output module is used to output the third power supply to the load; each group of energy conversion modules is also connected to the output module; A leakage current protection module is connected between each group of energy conversion modules and the output module. The leakage current protection module is used to protect the load from leakage current. The two sets of power supply modules are referred to as the first power supply module and the second power supply module, and the two sets of energy conversion modules are referred to as the first energy conversion module and the second energy conversion module. The input terminals of the first power supply module and the second power supply module are respectively connected to the mains power and the renewable energy board. The output terminal of the first power supply module is connected to the first energy conversion module, and the output terminal of the second power supply module is connected to the second energy conversion module.
2. The low-voltage power supply and energy storage device for the mobile food cart according to claim 1, characterized in that, It also includes a main control module, which is connected to the energy storage module.
3. The low-voltage power supply and energy storage device for the mobile food cart according to claim 2, characterized in that, It also includes a first detection module and a second detection module; the first detection module is connected between the main control module and the two sets of energy conversion modules, and the first detection module is used to detect the voltage of the second power supply provided by the energy storage module to the energy conversion module; the second detection module is connected between the main control module and the leakage protection module, and the second detection module is used to detect the leakage current of the leakage protection module.
4. The low-voltage power supply and energy storage device for the mobile food cart according to claim 1, characterized in that, It also includes a relay and an emergency stop switch element. The first end of the relay is connected to the energy storage module through the emergency stop switch element, and the second end of the relay is connected to the first energy conversion module and the second energy conversion module respectively.
5. The low-voltage power supply and energy storage device for the mobile food cart according to claim 4, characterized in that, The emergency stop switch element is a mechanical switch.
6. The low-voltage power supply and energy storage device for a mobile food cart according to any one of claims 1-5, characterized in that, The renewable energy panel is a photovoltaic panel.
7. The low-voltage power supply and energy storage device for a mobile food cart according to any one of claims 1-5, characterized in that, The energy storage module includes multiple energy storage elements connected in parallel.
8. The low-voltage power supply and energy storage device for the mobile food cart according to claim 7, characterized in that, The energy storage element is a battery.
9. The low-voltage power supply and energy storage device for a mobile food cart according to any one of claims 1-5, characterized in that, Each energy conversion module includes an inverter; and / or, the leakage protection module includes a leakage current protector.
10. A mobile food cart, characterized in that, Includes a low-voltage power supply energy storage device for mobile food carts as described in any one of claims 1-9.