Multi-mode power supply platform suitable for box throwing vehicle

Abstract

The invention provides a multi-mode power supply platform suitable for a box throwing vehicle, and relates to the technical field of automobile power supply, the multi-mode power supply platform comprises a new energy chassis, the new energy chassis is connected with a high-voltage power conversion connector through a cable, and the output end of the high-voltage power conversion connector is connected with a first inverter through a cable; the output end of the first inverter is connected with a first dual-power-supply switcher through a cable, the input end of the first dual-power-supply switcher is further connected with a mains supply, the output end of the first dual-power-supply switcher is connected with a frequency conversion compressor and a second inverter through cables, and the output end of the second inverter is connected with a refrigerator fan through a cable. According to the invention, the automatic connection and separation of the power supply between the chassis and the carriage are realized through the high-voltage power conversion connector, and the tedious operation and potential safety hazards caused by frequent manual plugging and unplugging are thoroughly avoided, and meanwhile, the commercial power priority principle of the dual-power switcher I and the vehicle power priority principle of the dual-power switcher II are utilized; and a multi-source power supply and intelligent switching mechanism is constructed.

Description

Technical Field

[0001] This invention relates to the field of automotive power supply technology, and in particular to a multi-mode power supply platform suitable for dump trucks. Background Technology

[0002] A detachable cargo truck is a type of truck whose superstructure is frequently removed and replaced. Typically, one truck is equipped with three superstructures. For example, after transporting an empty superstructure to location A, the empty superstructure is unloaded, and a fully loaded superstructure is immediately loaded. The fully loaded superstructure is then transported to location B, where it is unloaded. The empty superstructure from location B is then transported back to location A, and this process is repeated. This eliminates the need for drivers to wait for loading and unloading, improving transportation efficiency. Furthermore, instead of purchasing three complete trucks, the purchase of one chassis and three superstructures is reduced, decreasing the number of drivers required and significantly saving costs.

[0003] The electrical equipment in a detachable truck body typically includes interior lights, side marker lights, side marker lights, and a 24V~72V motor. If the truck body is a refrigerated container, the refrigeration unit and refrigeration fan need to be powered from the chassis.

[0004] In the existing technology, due to the special nature of the transportation scenario, the cargo compartment of a detachable truck generally needs to be unloaded and lowered once every hour. Each manual unplugging and plugging wastes time, and if operational errors occur and the unplugging and plugging are forgotten, the cables may be pulled off, which is a defect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a multi-mode power supply platform suitable for detachable vehicles. It realizes the automatic connection and disconnection of power between the chassis and the vehicle body through a high-voltage power swapping connector, completely avoiding the cumbersome operation and safety hazards caused by frequent manual plugging and unplugging. At the same time, by utilizing the AC power priority principle of dual power switch one and the vehicle power priority principle of dual power switch two, a multi-source power supply and intelligent switching mechanism is constructed, which not only significantly reduces operating costs, but also ensures the reliability of power supply to loads such as variable frequency compressors and chiller fans.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-mode power supply platform suitable for detachable vehicles, including a new energy chassis, wherein the new energy chassis is connected to a high-voltage power swapping connector via a cable, the output end of the high-voltage power swapping connector is connected to an inverter one via a cable, the output end of the inverter one is connected to a dual power switch one via a cable, the input end of the dual power switch one is also connected to mains power, the output end of the dual power switch one is connected to a variable frequency compressor and an inverter two via cables respectively, and the output end of the inverter two is connected to a chiller fan via a cable;

[0007] The output end of the new energy chassis is also connected to inverter three, the output end of inverter three is connected to V three parallel lithium battery packs, the input end of V three parallel lithium battery packs is also connected to roof solar photovoltaic, the output end of V three parallel lithium battery packs is connected to hydraulic motor and inverter four respectively through cables, and the output end of inverter four is connected to dual power switch two through cables.

[0008] In a preferred embodiment, the second dual power switch is also connected in series between the high-voltage power swapping connector and the first inverter.

[0009] In a preferred embodiment, the high-voltage battery swapping connector receives 540V DC power from the new energy chassis and transmits the 540V DC power to inverter three and dual power switch two. Inverter three converts the received 540V DC power into 29.2V DC power and outputs it to three parallel lithium battery packs at 24V.

[0010] In a preferred embodiment, the 24V three-group parallel lithium battery pack receives 29.2V DC power from inverter three and the rooftop solar photovoltaic for charging, and when discharging, the 24V three-group parallel lithium battery pack transmits 24V DC power to inverter four and the hydraulic motor. Inverter four converts the received 24V DC power into 540V DC power and outputs it to dual power switch two.

[0011] In a preferred embodiment, the dual power switch 2 also receives 540V DC power converted by inverter 4, and the dual power switch 2 transmits the 540V DC power transmitted by the high-voltage power exchange connector and inverter 4 to inverter 1. Inverter 1 converts the received 540V DC power into 220V AC power and outputs it to dual power switch 1.

[0012] In a preferred embodiment, the dual power switch receives 220V AC power from inverter one and the mains power, and transmits the 220V AC power to the variable frequency compressor and inverter two. Inverter two converts the received 220V AC power into 24V DC power and outputs it to the chiller fan.

[0013] In a preferred embodiment, the dual power switch 2 prioritizes connecting the circuits of the high-voltage power swap connector and inverter 1. When the power of the high-voltage power swap connector is insufficient, it then connects the circuits of inverter 4 and inverter 1.

[0014] In a preferred embodiment, the dual power switch first preferentially connects the mains power to the circuit of the variable frequency compressor and inverter second, and when the mains power is not connected, it then connects the circuit of inverter first to the circuit of variable frequency compressor and inverter second.

[0015] In one preferred embodiment, the rooftop solar photovoltaic system includes a photovoltaic module and a transformer module.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0017] 1. In this invention, the automatic connection and disconnection of power between the chassis and the carriage is realized through the high-voltage power swapping connector, which completely avoids the cumbersome operation and safety hazards caused by frequent manual plugging and unplugging. At the same time, by utilizing the AC power priority principle of dual power switch one and the vehicle power priority principle of dual power switch two, a multi-source power supply and intelligent switching mechanism is constructed, which not only significantly reduces operating costs, but also ensures the reliability of power supply to loads such as variable frequency compressors and chiller fans.

[0018] 2. In this invention, the single-source power supply system achieves automatic power acquisition by retaining the high-voltage power swapping connector, and uses a dual power switch to maintain intelligent switching between mains power and inverter power supply. While ensuring the core cooling functions of the variable frequency compressor and chiller fan as well as the automated operation of the hydraulic motor, it simplifies the system architecture and further improves cost-effectiveness, making it suitable for conventional operation scenarios where the requirements for independent off-power endurance are not high.

[0019] 3. In this invention, the diesel generator power supply system generates electricity by driving the generator through the diesel chassis, and together with the roof solar photovoltaic, it charges three parallel 24V lithium battery packs. Then, through inverter five and dual power switch one, it supplies power to the cooling system, so that even non-new energy chassis can enjoy the operational advantages of no manual plugging and unplugging, reliable power supply and effective use of green energy, which greatly expands the scope of application. Attached Figure Description

[0020] Figure 1 is a framework diagram of a multi-source power supply system for a multi-mode power supply platform suitable for a box-spinning vehicle proposed in this invention.

[0021] Figure 2 is a framework diagram of a single-source power supply system for a multi-mode power supply platform suitable for a box-spinning vehicle proposed in this invention;

[0022] Figure 3 is a framework diagram of a diesel generator-based power supply system for a multi-mode power supply platform suitable for dump trucks proposed in this invention.

[0023] Legend:

[0024] 101. New energy chassis; 102. High-voltage battery swapping connector; 103. Inverter I; 104. Dual power switch I; 105. Mains power; 106. Variable frequency compressor; 107. Inverter II; 108. Refrigeration fan; 109. Inverter III; 110. 24V lithium battery; 111. Hydraulic motor;

[0025] 210. Three parallel lithium battery packs (21V and 24V); 211. Inverter IV; 212. Rooftop solar photovoltaic system; 213. Dual power switch II;

[0026] 301. Diesel chassis; 302. Generator; 303. Parking air conditioner; 304. Inverter 5. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] As shown in Figure 1, the present invention provides a technical solution: a multi-mode power supply platform suitable for a dump truck, which is a multi-source power supply system, including a new energy chassis 101. The new energy chassis 101 is connected to a high-voltage power swapping connector 102 via a cable. The output end of the high-voltage power swapping connector 102 is connected to an inverter 103 via a cable. The output end of the inverter 103 is connected to a dual power switch 104 via a cable. The input end of the dual power switch 104 is also connected to mains power 105. The output end of the dual power switch 104 is connected to a variable frequency compressor 106 and an inverter 2 107 via cables. The output end of the inverter 2 107 is connected to a chiller fan 108 via a cable.

[0030] Among them, the dual power switch 104 receives 220V AC power from inverter 103 and mains power 105, and transmits the 220V AC power to the variable frequency compressor 106 and inverter 2 107. Inverter 2 107 converts the received 220V AC power into 24V DC power and outputs it to the chiller fan 108.

[0031] Among them, the dual power switch 104 first connects the mains power 105 to the circuit of the variable frequency compressor 106 and the inverter 107. When the mains power 105 is not connected, the inverter 103 connects the circuit of the variable frequency compressor 106 and the inverter 107.

[0032] In the above content, the high-voltage DC power provided by the new energy chassis 101 is automatically drawn through the high-voltage power swapping connector 102, and then converted into 220V AC power by the inverter 103 and delivered to the dual power switch 104. At the same time, the mains power 105 is also connected to the dual power switch 104 as an independent 220V AC power source. The dual power switch 104 follows the preset "mains power priority" logic for automatic power management. That is, when the mains power 105 is detected to be connected, the mains power 105 is used first. Only when the mains power 105 is not connected will it automatically switch to the vehicle inverter power provided by the inverter 103 to ensure continuous power supply to the back-end load. One of the 220V AC power outputs from the dual power switch 104 is directly supplied to the high-power variable frequency compressor 106 to work, and the other is supplied to the inverter 2 107 to convert it into 24V DC power to drive the chiller fan 108.

[0033] In this design, automatic power-on is achieved when the chassis and the cargo box are docked through the high-voltage power-swapping connector 102, eliminating the need for manual plugging and unplugging. This significantly improves the efficiency of cargo box swapping operations and avoids the risk of breaking cables or coming into contact with high voltage due to forgetting to plug and unplug. At the same time, the dual power supply switching mechanism prioritizes the use of the lower-cost mains power 105 to power the refrigeration system, effectively reducing the vehicle's operating costs and ensuring that the system can seamlessly switch to the vehicle's power supply in situations where there is no mains power 105, maintaining the continuity and reliability of the refrigeration function of the refrigerated box.

[0034] The output end of the new energy chassis 101 is also connected to inverter 3 109. The output end of inverter 3 109 is connected to a 24V three-group parallel lithium battery pack 210. The input end of the 24V three-group parallel lithium battery pack 210 is also connected to a roof solar photovoltaic 212. The roof solar photovoltaic 212 includes photovoltaic modules and transformer modules. The output end of the 24V three-group parallel lithium battery pack 210 is connected to hydraulic motor 111 and inverter 4 211 respectively via cables. The output end of inverter 4 211 is connected to dual power switch 213 via cables. Dual power switch 213 is also connected in series between high voltage power swapping connector 102 and inverter 1 103.

[0035] Among them, the high-voltage battery swapping connector 102 receives 540V DC power from the new energy chassis 101 and transmits the 540V DC power to the inverter 109 and the dual power switch 213. The inverter 109 converts the received 540V DC power into 29.2V DC power and outputs it to the 24V three-group parallel lithium battery pack 210.

[0036] Among them, the 24V three-group parallel lithium battery pack 210 receives 29.2V DC power from inverter three 109 and roof solar photovoltaic 212 for charging, and when discharging, the 24V three-group parallel lithium battery pack 210 transmits 24V DC power to inverter four 211 and hydraulic motor 111. Inverter four 211 converts the received 24V DC power into 540V DC power and outputs it to dual power switch two 213;

[0037] Furthermore, the dual power switch 213 also receives 540V DC power converted by inverter 4 211, and the dual power switch 213 transmits the 540V DC power transmitted by high voltage power connector 102 and inverter 4 211 to inverter 1 103. Inverter 1 103 converts the received 540V DC power into 220V AC power and outputs it to dual power switch 1 104.

[0038] Moreover, the dual power switch 213 prioritizes connecting the circuits of the high-voltage power exchange connector 102 and the inverter 103. When the power of the high-voltage power exchange connector 102 is insufficient, it then connects the circuits of the inverter 4 211 and the inverter 103.

[0039] In the above description, the 540V DC power provided by the new energy chassis 101 is split through the high-voltage battery swapping connector 102. One path is sent to the dual power switch 213, while the other path supplies the inverter 109 to step down the voltage to 29.2V DC power, which then charges the 24V three-group parallel lithium battery pack 210. Simultaneously, the rooftop solar photovoltaic 212 also generates 29.2V DC power through its photovoltaic and transformer components to supplement the charging of the 24V three-group parallel lithium battery pack 210, thus establishing a dual charging mechanism of chassis charging and solar charging. When discharging, the 24V three-group parallel lithium battery pack 210 directly provides power to the hydraulic motor 111, while also transmitting 24V DC power. The power is sent to inverter 4 211 to be boosted and converted to 540V DC and output to dual power switch 2 213. The input terminal of dual power switch 2 213 simultaneously receives direct chassis power from high-voltage power swapping connector 102 and battery boost power from inverter 4 211. It follows the logic of "vehicle power priority", that is, it prioritizes connecting the circuit of high-voltage power swapping connector 102 and inverter 1 103 to use the chassis main power. Only when the power of high-voltage power swapping connector 102 is insufficient will it automatically switch to connecting the circuit of inverter 4 211 and inverter 1 103, thereby ensuring that the 540V DC power supplied to inverter 1 103 is uninterrupted, and thus ensuring the continuity of power supply to the subsequent cooling system.

[0040] In this design, the 24V three-group parallel lithium battery pack 210 not only serves as an independent power source for the hydraulic motor 111 to achieve remote control operation of automatic lifting of the vehicle compartment, but also realizes energy collection and storage through integration with the roof solar photovoltaic 212. The backup high-voltage power supply channel, which is independent of the chassis main power supply, is constructed through inverter four 211 and dual power switch two 213. This allows the system to switch directly to the backup power provided by the lithium battery pack when the chassis power supply fails to provide sufficient power. This ensures that the cooling system will not be interrupted and achieves continuous cooling capability under various extreme conditions such as being away from the vehicle and without mains power 105, greatly enhancing the applicability and reliability of the system.

[0041] In this embodiment, automatic access to the chassis power supply is achieved through the high-voltage battery swapping connector 102. A smart power priority management architecture is constructed using dual power switch one 104 and dual power switch two 213. Dual power switch one 104 manages the switching between the AC mains power 105 and the vehicle inverter power supply, establishing the principle of prioritizing the AC mains power 105 to reduce operating costs and ensure power supply continuity. Dual power switch two 213 manages the switching between the main power supply of the new energy chassis 101 and the backup high-voltage power supply provided by the 24V three-group parallel lithium battery pack 210 boosted by inverter four 211, establishing the principle of vehicle power priority. This design allows the system to automatically and seamlessly activate the energy storage system to maintain power supply to the cooling system when the main power supply is insufficient. Simultaneously, the 24V three-group parallel lithium battery pack 210 also... The system is charged via inverter 109 and rooftop solar photovoltaic 212, and directly drives hydraulic motor 111, thus integrating multiple functions such as energy storage, green energy collection, vehicle lifting power, and backup power supply for the core refrigeration system onto a collaborative platform. This design not only greatly improves the efficiency and safety of the cargo box swapping operation through comprehensive automation, avoiding the risk of human error, but also ensures a continuous, stable, and economical power supply for core loads such as variable frequency compressor 106, refrigeration fan 108, and hydraulic motor 111 under various complex operating conditions through multiple energy inputs and a two-level automatic switching logic from mains power 105, chassis main power supply, rooftop solar photovoltaic 212, and three parallel 24V lithium battery packs 210. This greatly enhances the adaptability and operational resilience of the entire system to different application scenarios.

[0042] Example 2

[0043] As shown in Figure 2, the multi-source power supply system based on Embodiment 1 can also include a single-source power supply system, including a new energy chassis 101. The 540V DC power from the new energy chassis 101 is transmitted to the high-voltage power swapping connector 102. The high-voltage power swapping connector 102 transmits the 540V DC power to inverter one 103 and inverter three 109 respectively. Inverter one 103 converts the 540V DC power into 220V AC power and transmits it to dual power switch one 104. Dual power switch one 104 is simultaneously connected to the 220V AC power from the mains power 105. Dual power switch one 104 transmits the 220V AC power to the variable frequency compressor 106 and inverter two 107 respectively. Inverter two 107 converts the 220V AC power into 24V DC power and transmits it to the chiller fan 108.

[0044] Meanwhile, inverter 109 converts 540V DC to 29.2V DC and transmits it to 24V lithium battery 110 for storage. When discharging, 24V lithium battery 110 transmits 24V DC to hydraulic motor 111.

[0045] In this embodiment, the 540V DC power output from the new energy chassis 101 is automatically distributed through the high-voltage power swapping connector 102. One path is directly supplied to inverter 103 to convert it into 220V AC power, and the other path is supplied to inverter 3 109 to step down it to 29.2V DC power and charge the 24V lithium battery 110. At the same time, the input terminal of the dual power switch 104 receives 220V AC power from inverter 103 and 220V AC power from the mains power 105, and automatically selects the power supply according to the preset "mains power priority" logic. One path of the 220V AC power output from the dual power switch 104 directly drives the variable frequency compressor 106, and the other path supplies inverter 2 107 to convert it into 24V DC power to drive the chiller fan 108. After being charged, the 24V lithium battery 110 is responsible for providing the 24V DC power required for the operation of the hydraulic motor 111.

[0046] In this design, the high-voltage power connector 102 maintains the advantage of automatic power connection when the carriage and chassis are docked, and continues to avoid the inefficiency and safety risks caused by manual plugging and unplugging. At the same time, the dual power switch 104 intelligently manages the mains power 105 and the vehicle inverter power supply, ensuring that the more economical mains power 105 is used to power the refrigeration system when mains power 105 is available, and automatically switches to the chassis power supply when mains power 105 is unavailable, ensuring the continuous operation of the variable frequency compressor 106 and the refrigeration fan 108. The independent 24V lithium battery 110 and its charging circuit ensure the autonomy and reliability of the hydraulic motor 111 in controlling the lifting and lowering of the carriage.

[0047] Example 3

[0048] As shown in Figure 3, based on the power supply methods of Embodiments 1 and 2, a power supply system based on diesel generator can also be included, comprising a diesel chassis 301. The diesel chassis 301 supplies diesel fuel to a generator 302 via an oil circuit. The 29.2V DC power generated by the generator 302 is transmitted to a 24V three-group parallel lithium battery pack 210 for charging. Simultaneously, the 24V three-group parallel lithium battery pack 210 is connected to a rooftop solar photovoltaic system 212 for charging. The 24V DC power is transmitted to the parking air conditioner 303 and inverter 304 respectively. Inverter 304 converts the 24V DC power to 220V AC power and transmits it to the dual power switch 104. The dual power switch 104 is also connected to the 220V AC power of the mains power 105. The dual power switch 104 transmits the 220V AC power to the variable frequency compressor 106 and inverter 107 respectively. Inverter 107 converts the 220V AC power to 24V DC power and transmits it to the refrigeration fan 108.

[0049] In this embodiment, the diesel chassis 301 consumes diesel fuel to drive the generator 302 to generate 29.2V DC power, which is then supplied to the 24V three-group parallel lithium battery pack 210 for charging. Simultaneously, the 29.2V DC power generated by the rooftop solar photovoltaic system 212 also flows into the 24V three-group parallel lithium battery pack 210 as a supplementary charging source, thus establishing a dual charging guarantee from diesel and solar power generation. Furthermore, when discharging, the 24V three-group parallel lithium battery pack 210 serves as the sole DC power source for the entire power supply system. One path of the 24V DC power output from the 24V three-group parallel lithium battery pack 210 directly supplies the parking air conditioner 303, while the other path supplies power to the inverter. Inverter 304 boosts the voltage to 220V AC, which is then supplied to dual power switch 104. Meanwhile, AC mains power 105, as an independent 220V AC power source, is also connected to dual power switch 104. Dual power switch 104 automatically manages according to a preset "AC priority" logic, prioritizing AC mains power 105 and automatically switching to the inverter power provided by inverter 304 when AC mains power 105 is unavailable. One path of the 220V AC output from inverter 304 directly drives the variable frequency compressor 106, while the other path supplies power to inverter 2 107, which converts the 220V AC to 24V DC to power the chiller fan 108.

[0050] This design effectively integrates the stable power generation capacity of the diesel generator 302 and the green supplementary energy of the rooftop solar photovoltaic system 212 through the core energy storage unit of the 24V three-parallel lithium battery pack 210. It also achieves energy buffering and storage, so that the 220V AC power supply for the high-power equipment in the refrigerated box no longer directly relies on the engine when the chassis is driving or parked. Instead, it is provided by the mains power 105 through intelligent switching or by the battery after inversion by inverter 304. This not only ensures the continuity of power supply and reduces operating costs, but also improves the rationality of energy utilization by directly powering the parking air conditioner 303 from the battery.

[0051] Working principle:

[0052] As shown in Figures 1-3, the present invention operates as follows:

[0053] As shown in Figure 1, the multi-source power supply system can be used in new energy vehicles. The new energy chassis 101 outputs 540V DC power through the high-voltage power swapping connector 102. One path is directly led to the dual power switch 213, and the other path is converted by the inverter 3 109 and together with the roof solar photovoltaic 212 to charge the 24V three-group parallel lithium battery pack 210. The dual power switch 213, based on the principle of vehicle power priority, transmits the 540V DC power from the high-voltage power swapping connector 102 or from the inverter 4 211 to the inverter 1 103 to convert it into 220V AC power. The 220V AC power converted by the inverter 1 103, together with the mains power 105, is connected to the dual power switch 1 104 and distributed according to the principle of mains power 105 priority to power the variable frequency compressor 106 and the chiller fan 108 driven by the inverter 2 107. In addition, the 24V three-group parallel lithium battery pack 210 also directly provides power to the hydraulic motor 111.

[0054] As shown in Figure 2, the single-source power supply system can be used as a simplified version of the multi-source power supply system in new energy vehicles. The new energy chassis 101 automatically provides 540V DC power through the high-voltage power swapping connector 102. This current is converted into 220V AC power by inverter 103 and sent to dual power switch 104. The other path is stepped down to 29.2V DC power by inverter 3 109 to charge the 24V lithium battery 110. The dual power switch 104 also manages the mains power 105 with priority. The 220V AC power output by the dual power switch 104 is directly supplied to the variable frequency compressor 106 and converted by inverter 2 107 to drive the chiller fan 108. The 24V lithium battery 110 independently provides power to the hydraulic motor 111.

[0055] As shown in Figure 3, the diesel generator power supply system can be used in fuel vehicles. The diesel chassis 301 drives the generator 302 to generate 29.2V DC power to charge the 24V three-group parallel lithium battery pack 210. At the same time, the roof solar photovoltaic 212 also supplements the battery pack with power. The power of the 24V three-group parallel lithium battery pack 210 is directly supplied to the parking air conditioner 303 on the one hand, and converted into 220V AC power by inverter 5 304 and sent to dual power switch 1 104 on the other hand. Dual power switch 1 104 follows the principle of mains power 105 priority and uses mains power 105 first. When mains power 105 is not connected, it automatically switches to the power of inverter 5 304. The 220V AC power output by inverter 5 304 finally drives the variable frequency compressor 106 and drives the refrigeration fan 108 after being converted by inverter 2 107.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-mode power supply platform suitable for box-swapping vehicles, characterized in that: The new energy chassis (101) is connected with a high-voltage battery replacement connector (102) through a cable, the output end of the high-voltage battery replacement connector (102) is connected with an inverter I (103) through a cable, the output end of the inverter I (103) is connected with a dual power switch I (104), the input end of the dual power switch I (104) is also connected with a mains (105), the output end of the dual power switch I (104) is connected with a variable frequency compressor (106) and an inverter II (107) through a cable respectively, the output end of the inverter II (107) is connected with a cold machine fan (108) through a cable; The output end of the new energy chassis (101) is also connected with an inverter III (109), the output end of the inverter III (109) is connected with a 24V three-group parallel lithium battery pack (210), the input end of the 24V three-group parallel lithium battery pack (210) is also connected with a roof solar photovoltaic (212), the output end of the 24V three-group parallel lithium battery pack (210) is connected with a hydraulic motor (111) and an inverter IV (211) through a cable respectively, the output end of the inverter IV (211) is connected with a dual power switch II (213) through a cable.

2. The multi-mode power supply platform for a box-dumping vehicle according to claim 1, characterized in that: The dual power switch II (213) is also connected in series between the high-voltage battery replacement connector (102) and the inverter I (103).

3. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The high-voltage battery replacement connector (102) receives 540V direct current from the new energy chassis (101) and transmits the 540V direct current to the inverter III (109) and the dual power switch II (213), the inverter III (109) converts the received 540V direct current into 29.2V direct current and outputs to the 24V three-group parallel lithium battery pack (210).

4. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The 24V three-group parallel lithium battery pack (210) receives 29.2V direct current from the inverter III (109) and the roof solar photovoltaic (212) for charging, and the 24V three-group parallel lithium battery pack (210) transmits 24V direct current to the inverter IV (211) and the hydraulic motor (111) when discharging, the inverter IV (211) converts the received 24V direct current into 540V direct current and outputs to the dual power switch II (213).

5. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The dual power switch II (213) also receives 540V direct current converted by the inverter IV (211), and the dual power switch II (213) transmits 540V direct current transmitted by the high-voltage battery replacement connector (102) and the inverter IV (211) to the inverter I (103), the inverter I (103) converts the received 540V direct current into 220V alternating current and outputs to the dual power switch I (104).

6. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The dual power switch one (104) receives 220V alternating current of the inverter one (103) and the mains (105), and transmits the 220V alternating current to the variable frequency compressor (106) and the inverter two (107), and the inverter two (107) converts the received 220V alternating current into 24V direct current and outputs to the cold machine fan (108).

7. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The dual power switch two (213) preferentially connects the circuit of the high-voltage battery replacement connector (102) and the inverter one (103), and when the power of the high-voltage battery replacement connector (102) is insufficient, the circuit of the inverter four (211) and the inverter one (103) is connected.

8. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The dual power switch one (104) preferentially connects the circuit of the mains (105) and the variable frequency compressor (106) and the inverter two (107), and when the mains (105) is not connected, the circuit of the inverter one (103) and the variable frequency compressor (106) and the inverter two (107) is connected.

9. The multi-mode power supply platform for a drop box vehicle of claim 1, wherein: The roof solar photovoltaic (212) comprises a photovoltaic assembly and a voltage conversion assembly.

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