Range-extended standby power system for fuel refrigerator car and vehicle

Abstract

The utility model provides an extended-range standby power system for a fuel refrigerator car and the vehicle, and relates to the technical field of fuel refrigerator cars. The fuel refrigerator car comprises an engine, a generator, an original car compressor and a refrigerating system. The engine is connected with the generator and the original vehicle compressor, and the original vehicle compressor is connected with the refrigerating system. The system comprises a controller, a battery module and a standby power compressor. The controller is connected with the engine and the generator, the battery module is connected with the generator and the standby power compressor, and the standby power compressor is connected with the refrigerating system. When the fuel refrigerator car is in a high-speed running state, the engine drives the original car compressor to operate so as to drive the refrigerating system to work, and the controller triggers the generator to charge the battery module when detecting that the load of the engine is in a preset efficient load state. When the fuel refrigerator car is in a parking state or a low-speed running state, the battery module supplies power to the standby power compressor to drive the refrigerating system to work, and fuel economy and convenience of refrigeration of the refrigerator car are improved.

Description

Technical Field

[0001] This application relates to the field of fuel-powered refrigerated truck technology, and more specifically, to a range-extended backup power system and vehicle for fuel-powered refrigerated trucks. Background Technology

[0002] Refrigerated trucks are vehicles used to transport fresh food and other goods that require maintaining a certain refrigerated temperature. Currently, the mainstream refrigerated trucks on the market are still traditional fuel-powered vehicles. When the vehicle is parked (e.g., standing in a queue) or traveling at low speed, the engine needs to keep running to drive the refrigeration system to maintain the low temperature environment inside the refrigerated compartment. However, in this process, idling fuel consumption is a serious problem, resulting in low fuel efficiency and conversion efficiency, high operating costs, and poor fuel economy.

[0003] Therefore, in recent years, corresponding backup power systems for refrigerated trucks have emerged that use electricity to drive the refrigeration system. The problem with existing backup power systems is that they require an extension cord to connect to 220V or 380V AC mains power for operation. However, most vehicles cannot find a fixed AC mains outlet, which means that the backup power system cannot drive the refrigeration system for cooling when the refrigerated truck is parked at any time and needs to use electricity, resulting in low convenience.

[0004] In summary, how to improve the fuel economy and convenience of refrigeration in refrigerated trucks is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a range-extended backup power system and vehicle for fuel-powered refrigerated trucks, so as to improve the fuel economy and convenience of refrigeration in refrigerated trucks.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] On the one hand, this application provides a range-extended backup power system for a fuel-powered refrigerated truck, which is applied to a fuel-powered refrigerated truck. The fuel-powered refrigerated truck includes: an engine, a generator, a vehicle compressor, and a refrigeration system. The engine is connected to the generator and the vehicle compressor, respectively, and the vehicle compressor is also connected to the refrigeration system.

[0008] The range-extended backup power system for fuel-powered refrigerated vehicles includes: a controller, a battery module, and a backup power compressor; the controller is connected to the engine and the generator respectively, the battery module is connected to the generator and the backup power compressor respectively, and the backup power compressor is also connected to the refrigeration system;

[0009] When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the original vehicle compressor to operate in order to drive the refrigeration system. The controller is used to trigger the generator to charge the battery module when it detects that the engine load is in a preset high-efficiency load state.

[0010] When the fuel-powered refrigerated truck is parked or traveling at low speed, the battery module is used to supply power to the backup compressor to drive the refrigeration system.

[0011] Furthermore, the fuel-powered refrigerated truck also includes the original vehicle battery and the original vehicle refrigeration unit controller, and the range-extended backup power system for the fuel-powered refrigerated truck also includes a voltage conversion module;

[0012] The generator is connected to the voltage conversion module, the original vehicle battery, and the original vehicle cooling engine controller via a DC bus, and the voltage conversion module is also connected to the battery module.

[0013] When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the generator, which supplies power to the original vehicle battery and the original vehicle refrigeration controller. When the engine load is at the preset high-efficiency load state, the voltage output by the generator is processed by the voltage conversion module and then used to charge the battery module.

[0014] Furthermore, the voltage conversion module includes an inverter and a charger;

[0015] One end of the inverter is connected to the generator and the original vehicle battery via the DC bus, and the other end of the inverter is connected to the charger, which is also connected to the battery module.

[0016] The generator or the original vehicle battery charges the battery module through the inverter and the charger.

[0017] Furthermore, the voltage conversion module also includes a unidirectional DC-DC converter;

[0018] One end of the unidirectional DC-DC converter is connected to the original vehicle battery and the original vehicle cooling engine controller via the DC bus, and the other end of the unidirectional DC-DC converter is connected to the battery module.

[0019] The battery module supplies power to the original vehicle battery and the original vehicle cooling controller through the unidirectional DC-DC converter.

[0020] Furthermore, the voltage conversion module is a bidirectional DC-DC converter;

[0021] One end of the bidirectional DC-DC converter is connected to the generator, the original vehicle battery, and the original vehicle cooling engine controller via the DC bus, and the other end of the bidirectional DC-DC converter is connected to the battery module.

[0022] The generator or the original vehicle battery charges the battery module through the bidirectional DC-DC converter;

[0023] The battery module supplies power to the original vehicle battery and the original vehicle cooling controller through the bidirectional DC-DC converter.

[0024] Furthermore, the range-extended backup power system for fuel-powered refrigerated vehicles also includes a photovoltaic module;

[0025] The photovoltaic module is connected to the voltage conversion module via the DC bus, and the photovoltaic module is used to charge the battery module through the voltage conversion module.

[0026] Furthermore, the photovoltaic module includes a photovoltaic power generation unit and a photovoltaic control component;

[0027] The photovoltaic power generation unit is connected to the photovoltaic control component, and the photovoltaic control component is also connected to the voltage conversion module through the DC bus; the photovoltaic control component is used to control the magnitude of the current output by the photovoltaic power generation unit.

[0028] Furthermore, the range-extended backup power system for fuel-powered refrigerated vehicles also includes a compressor controller; the compressor controller is connected to both the battery module and the backup power compressor.

[0029] The compressor controller is used to convert the DC power output from the battery module into AC power and then output it to the backup compressor;

[0030] The compressor controller is also used to monitor voltage and current parameters in real time. When an overvoltage or overcurrent abnormal condition is detected, the compressor controller triggers a protection switch to cut off the output.

[0031] Furthermore, the range-extended backup power system for fuel-powered refrigerated vehicles also includes a connector assembly, and the battery module includes multiple battery cells;

[0032] Multiple battery cells are connected in series and / or in parallel according to the power consumption requirements of the fuel-powered refrigerated truck, and then connected to the compressor controller through the connector assembly.

[0033] On the other hand, this application also provides a vehicle, the vehicle including: an engine, a generator, a vehicle compressor, a refrigeration system, and a range-extended backup power system for fuel-cooled refrigerated vehicles as described in any of the foregoing embodiments;

[0034] The engine is connected to the generator and the original vehicle compressor respectively, and the original vehicle compressor is also connected to the refrigeration system;

[0035] The range-extended backup power system for fuel-powered refrigerated vehicles is connected to the engine, the generator, and the refrigeration system, respectively.

[0036] Compared with the prior art, this application has the following advantages:

[0037] This application provides a range-extended backup power system for a fuel-powered refrigerated truck. The fuel-powered refrigerated truck includes an engine, a generator, a vehicle compressor, and a refrigeration system. The engine is connected to both the generator and the vehicle compressor, and the vehicle compressor is also connected to the refrigeration system. The range-extended backup power system for the fuel-powered refrigerated truck includes a controller, a battery module, and a backup power compressor. The controller is connected to both the engine and the generator, the battery module is connected to both the generator and the backup power compressor, and the backup power compressor is also connected to the refrigeration system. When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the vehicle compressor to operate, thereby powering the refrigeration system. The controller triggers the generator to charge the battery module when it detects that the engine load is at a preset high-efficiency load state. When the fuel-powered refrigerated truck is parked or traveling at low speed (i.e., when the fuel-powered refrigerated truck is not traveling at high speed), the battery module supplies power to the backup power compressor to drive the refrigeration system.

[0038] Compared to existing backup power systems that require extension cords to connect to fixed AC outlets for charging, this application does not require altering the power structure of the fuel-powered refrigerated truck. It only requires adding a controller, battery module, and backup power compressor to the existing structure. This allows the battery module to be charged by the existing engine and generator when the vehicle is traveling at high speeds, while the refrigeration system continues to operate continuously via the battery module and backup power compressor when the vehicle is parked or traveling at low speeds. This solves the problem of idling fuel consumption in fuel-powered refrigerated trucks and also improves the charging convenience of the backup power system. Furthermore, during high-speed driving, this application uses a charging strategy where the generator only charges the battery module when the controller detects that the engine load is at a preset high-efficiency load state. This reduces the increase in fuel consumption, resulting in significant fuel savings and greatly improving fuel economy. Attached Figure Description

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] Figure 1 This is one of the structural schematic diagrams of a range-extended backup power system for a fuel-powered refrigerated vehicle provided in an embodiment of this application;

[0041] Figure 2 This is a second schematic diagram of a range-extended backup power system for a fuel-powered refrigerated vehicle, provided as an embodiment of this application.

[0042] Figure 3 This is the third schematic diagram of a range-extended backup power system for a fuel-powered refrigerated vehicle, provided as an embodiment of this application.

[0043] Figure 4 A fourth schematic diagram of a range-extended backup power system for a fuel-powered refrigerated vehicle provided in this application embodiment;

[0044] Figure 5 This is the fifth schematic diagram of a range-extended backup power system for a fuel-powered refrigerated vehicle, provided as an embodiment of this application.

[0045] Icons: 10-Ranged Extended-Range Backup Power System for Fuel-Powered Refrigerated Trucks; 20-Engine; 30-Generator; 40-Original Vehicle Compressor; 50-Refrigeration System; 60-Original Vehicle Battery; 70-Original Vehicle Refrigeration Controller; 100-Controller; 200-Battery Module; 300-Backup Power Compressor; 400-Voltage Conversion Module; 410-Inverter; 420-Charger; 430-One-Way DC-DC Converter; 440-Two-Way DC-DC Converter; 500-Photovoltaic Module; 510-Photovoltaic Power Generation Unit; 520-Photovoltaic Control Components; 600-Compressor Controller; 700-Connector Assembly. Detailed Implementation

[0046] The technical solutions of the embodiments 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 the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] As described in the background section, traditional fuel-powered refrigerated trucks rely on engine idling to drive the refrigeration system when parked or driving at low speeds, resulting in significant idling fuel consumption and low fuel economy. Existing backup power systems for refrigerated trucks suffer from the problem that power is supplied via an extension cord connected to 220V or 380V AC mains power, but most vehicles lack a fixed power outlet, leading to low convenience.

[0050] In view of this, please refer to Figure 1 This application provides a range-extended backup power system 10 for fuel-powered refrigerated trucks.

[0051] The fuel-powered refrigerated truck includes: an engine 20, a generator 30, a vehicle compressor 40, and a refrigeration system 50. The engine 20 is connected to both the generator 30 and the vehicle compressor 40, and the vehicle compressor 40 is also connected to the refrigeration system 50.

[0052] The range-extended backup power system 10 for fuel-powered refrigerated vehicles provided in this application embodiment includes: a controller 100, a battery module 200, and a backup power compressor 300. The controller 100 is connected to the engine 20 and the generator 30, the battery module 200 is connected to the generator 30 and the backup power compressor 300, and the backup power compressor 300 is also connected to the refrigeration system 50.

[0053] It should be noted that the engine 20 is connected to the original vehicle compressor 40 and the generator 30 via belt drive. Furthermore, the original vehicle compressor 40 is the mechanical compressor originally found in the fuel-powered refrigerated truck, while the backup electric compressor 300 is the electric compressor provided in this embodiment.

[0054] When the fuel-powered refrigerated truck is traveling at high speed, the engine 20 drives the original compressor 40 to operate, thereby driving the refrigeration system 50. The controller 100 is used to trigger the generator 30 to charge the battery module 200 when it detects that the engine 20 is under a preset high-efficiency load state (i.e., high speed and low fuel consumption).

[0055] When the fuel-powered refrigerated truck is parked or traveling at low speed (i.e., when the fuel-powered refrigerated truck is not traveling at high speed), the battery module 200 is used to supply power to the backup compressor 300 to drive the refrigeration system 50, thereby ensuring continuous refrigeration of the cargo box during parking or low-speed driving.

[0056] It should be noted that when the engine 20 is under a preset high-efficiency load state, it indicates that the engine 20 has high fuel efficiency. Optionally, the preset high-efficiency load state is: the engine speed of 20 is stable in the range of 1500-2000 rpm for more than 5 minutes.

[0057] Based on the above design, this application adds a range-extended backup power system 10 for fuel-fired refrigerated trucks to the original structure of the fuel-fired refrigerated truck. The system has a simple structure, low modification cost, and can ensure that the refrigeration system 50 can be driven to refrigerate when the refrigerated truck is driving at low speed or when it is parked and in use.

[0058] Specifically, when the fuel-powered refrigerated truck is traveling at high speed, the engine 20 drives the original compressor 40 and generator 30 via a belt, and the refrigeration system 50 is driven only by the engine 20 and the original compressor 40. During this process, the controller 100 will monitor the operating status of the engine 20 in real time. If the controller 100 does not detect that the engine 20 is under a preset high-efficiency load, the generator 30 will only drive other electronic devices in the fuel-powered refrigerated truck to maintain the basic operation of the vehicle. If the controller 100 detects that the engine 20 is under a preset high-efficiency load, it indicates that the fuel utilization efficiency and conversion efficiency are high at this time. The controller 100 will then trigger the generator 30 to charge the battery module 200, thereby storing energy for subsequent parking refrigeration or low-speed driving refrigeration.

[0059] When the fuel-powered refrigerated truck is traveling at low speed, the engine 20 continues to operate, but it no longer drives the original compressor 40. At this time, the battery module 200 supplies power to the backup compressor 300 to drive the refrigeration system 50.

[0060] When the fuel-powered refrigerated truck is parked, the battery module 200 also supplies power to the backup compressor 300 to drive the refrigeration system 50.

[0061] Compared to existing backup power systems that require extension cords to connect to fixed AC outlets for charging, this application does not require altering the power structure of the fuel-powered refrigerated truck. It only requires adding a controller 100, a battery module 200, and a backup power compressor 300 to the existing structure. This allows the vehicle to charge the battery module 200 through its own structure when driving at high speeds, and to continuously operate the refrigeration system 50 via the battery module 200 and backup power compressor 300 when the vehicle is parked or driving at low speeds. This solves the problem of idling fuel consumption in fuel-powered refrigerated trucks while also improving the charging convenience of the backup power system. Furthermore, during high-speed driving, this application uses a charging strategy where the controller 100 detects that the engine 20 is under a preset high-efficiency load state before triggering the generator 30 to centrally charge the battery module 200. This reduces the increase in fuel consumption and significantly improves fuel economy (actual fuel savings can reach 15%-20%), greatly enhancing fuel efficiency.

[0062] To better understand the high-speed charging process, please refer to [link / reference]. Figure 2 As an optional implementation, the fuel-powered refrigerated truck also includes: the original vehicle battery 60 and the original vehicle refrigeration unit controller 70. The range-extended backup power system 10 for the fuel-powered refrigerated truck also includes: a voltage conversion module 400.

[0063] The generator 30 is connected to the voltage conversion module 400, the original vehicle battery 60 and the original vehicle cooling controller 70 via a DC bus, and the voltage conversion module 400 is also connected to the battery module 200.

[0064] When the refrigerated truck is traveling at high speed, the engine 20 drives the original compressor 40 and also drives the generator 30 via belt. The generator 30 supplies power to the original battery 60 and the original refrigeration controller 70 through a DC bus to maintain the basic operation of the vehicle. When the controller 100 detects that the engine 20 is under a preset high-efficiency load, the controller 100 triggers the generator 30 to supply power to the battery module 200. Specifically, the electrical energy output by the generator 30 flows to the voltage conversion module 400 through the DC bus. The voltage conversion module 400 steps down or up the DC power output by the generator 30 before outputting it to the battery module 200, thereby charging the battery module 200.

[0065] As can be seen, the above charging method is based on the existing engine 20 and generator 30 in the fuel-powered refrigerated truck. As an alternative implementation method, the battery module 200 can also be charged by solar photovoltaic power generation during the summer peak electricity consumption period, thereby improving economic efficiency.

[0066] Specifically, the range-extended backup power system 10 for fuel-powered refrigerated trucks also includes a photovoltaic module 500. The photovoltaic module 500 is connected to the voltage conversion module 400 via a DC bus, and is used to charge the battery module 200 through the voltage conversion module 400.

[0067] Furthermore, the photovoltaic module 500 includes a photovoltaic power generation unit 510 and a photovoltaic control component 520. The photovoltaic power generation unit 510 is connected to the photovoltaic control component 520, and the photovoltaic control component 520 is also connected to the voltage conversion module 400 via a DC bus. The photovoltaic control component 520 is used to control the magnitude of the current output by the photovoltaic power generation unit 510.

[0068] Optionally, the photovoltaic power generation unit 510 consists of multiple photovoltaic panels, and the photovoltaic control component 520 can be multiple switching transistors. By controlling the opening and closing of the multiple switching transistors, the magnitude of the current output by the photovoltaic power generation unit 510 is controlled. The voltage conversion module 400 regulates the DC power output by the photovoltaic power generation unit 510 and outputs it to the battery module 200.

[0069] In the embodiments of this application, please refer to Figure 3 The voltage conversion module 400 includes an inverter 410 and a charger 420. One end of the inverter 410 is connected to the generator 30 and the original vehicle battery 60 via a DC bus, and the other end of the inverter 410 is connected to the charger 420, which is also connected to the battery module 200.

[0070] When the fuel-powered refrigerated truck is traveling at high speed, the battery module 200 can be charged by the generator 30 or the original vehicle battery 60. That is, the generator 30 or the original vehicle battery 60 charges the battery module 200 after voltage regulation by the inverter 410 and the charger 420.

[0071] In addition, since the original vehicle refrigeration controller 70, i.e. the refrigeration fan, still needs to be powered to operate during the refrigeration process of the fuel-powered refrigeration truck, the original vehicle refrigeration controller 70 is prone to undervoltage problems when the vehicle is parked or driving at low speed, relying solely on the original vehicle battery 60 to power the original vehicle refrigeration controller 70.

[0072] To address the aforementioned issues, in one optional embodiment, the voltage conversion module 400 further includes a unidirectional DC-DC converter 430. One end of the unidirectional DC-DC converter 430 is connected to both the original vehicle battery 60 and the original vehicle engine controller 70 via a DC bus, while the other end is connected to the battery module 200.

[0073] When the fuel-powered refrigerated truck is parked or traveling at low speed, the battery module 200 is also used to supply power to the original vehicle battery 60 and the original vehicle refrigeration controller 70 through the unidirectional DC-DC converter 430.

[0074] To simplify the structure, in another alternative implementation, please refer to... Figure 4 The voltage conversion module 400 is a bidirectional DC-DC converter 440. One end of the bidirectional DC-DC converter 440 is connected to the generator 30, the original vehicle battery 60 and the original vehicle cooling engine controller 70 via a DC bus, and the other end of the bidirectional DC-DC converter 440 is connected to the battery module 200.

[0075] The bidirectional DC-DC converter 440 supports boosting the low-voltage DC (12V / 24V) from the generator 30 to the high voltage (e.g., 48V / 72V) required by the battery module 200, while also being compatible with reverse discharge.

[0076] When the fuel-powered refrigerated truck is traveling at high speed and the generator load is at a preset high-efficiency load state, the generator 30 charges the battery module 200 through the bidirectional DC-DC converter 440.

[0077] When the fuel-powered refrigerated truck is parked or traveling at low speed, the battery module 200 supplies power to the backup compressor 300. In addition, the battery module 200 also supplies power to the original vehicle battery 60 and the original vehicle refrigeration controller 70 through the bidirectional DC-DC converter 440, so as to prevent the original vehicle battery 60 from being undervoltage and the original vehicle refrigeration controller 70 from malfunctioning.

[0078] Compared to the voltage conversion method of inverter 410 + charger 420 + unidirectional DC-DC converter 430, the use of bidirectional DC-DC converter 440 greatly simplifies the system structure, reduces costs, achieves more efficient constant voltage and constant current charging, and accurately controls the overvoltage risk of battery module 200.

[0079] As an optional implementation, please refer to Figure 5 The range-extended backup power system 10 for fuel-powered refrigerated trucks also includes a compressor controller 600. The battery module 200 is connected to one end of the compressor controller 600 via circuit control components such as fuses and circuit breakers, while the other end of the compressor controller 600 is connected to the backup power compressor 300.

[0080] The compressor controller 600 converts the DC power output from the battery module 200 into AC power and outputs it to the backup compressor 300. Furthermore, the compressor controller 600 monitors voltage and current parameters in real time. When overvoltage or overcurrent abnormal conditions are detected, the compressor controller 600 triggers a protection switch to cut off the output.

[0081] In addition, in order to meet the power and energy requirements of different vehicle models, in this embodiment of the application, the range-extended backup power system 10 for fuel-powered refrigerated vehicles also includes a connector assembly 700 and a battery module 200 including multiple battery cells.

[0082] Multiple battery units are connected in series and / or in parallel according to the power demand of the fuel-powered refrigerated truck, and then connected to the compressor controller 600 through the connector assembly 700.

[0083] As an alternative implementation, the range-extended backup power system 10 for fuel-powered refrigerated trucks also includes a charging switch and a discharging switch located in the driver's cab. If the discharging switch is pressed, the battery module 200 supplies power to the backup compressor 300, thereby driving the refrigeration system 50. If the discharging switch is not pressed, the original engine 20 drives the original compressor 40 to power the refrigeration system 50. During driving, if the battery module 200's charge is too low, the driver can press the charging switch to charge the battery module 200 while driving.

[0084] Furthermore, this application embodiment also provides a vehicle, which includes: an engine 20, a generator 30, a vehicle compressor 40, a refrigeration system 50, and a range-extended backup power system 10 for fuel-powered refrigerated vehicles as described in any of the foregoing embodiments.

[0085] The engine 20 is connected to the generator 30 and the original vehicle compressor 40, and the original vehicle compressor 40 is also connected to the refrigeration system 50. Furthermore, the range-extended backup power system 10 for fuel-powered refrigerated trucks is connected to the engine 20, generator 30, and refrigeration system 50.

[0086] In summary, this application provides a range-extended backup power system and vehicle for a fuel-powered refrigerated truck. The fuel-powered refrigerated truck includes an engine, a generator, a vehicle compressor, and a refrigeration system. The engine is connected to both the generator and the vehicle compressor, and the vehicle compressor is also connected to the refrigeration system. The range-extended backup power system includes a controller, a battery module, and a backup compressor. The controller is connected to both the engine and the generator, the battery module is connected to both the generator and the backup compressor, and the backup compressor is also connected to the refrigeration system. When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the vehicle compressor to operate, thereby powering the refrigeration system. The controller triggers the generator to charge the battery module when it detects that the engine load is at a preset high-efficiency load state. When the fuel-powered refrigerated truck is parked or traveling at low speed, the battery module supplies power to the backup compressor to power the refrigeration system.

[0087] This application adds a range-extended backup power system to the existing structure of a fuel-powered refrigerated truck. The system is simple in structure and has low modification costs. This application does not require changing the power structure of the fuel-powered refrigerated truck; it only requires adding a controller, battery module, and backup power compressor to the existing structure. This allows the vehicle to charge the battery module through its own structure when driving at high speeds. When the vehicle is parked or driving at low speeds, the battery module and backup power compressor drive the refrigeration system continuously. This solves the problem of idling fuel consumption in fuel-powered refrigerated trucks and also improves the charging convenience of the backup power system. Furthermore, during high-speed driving, this application uses a charging strategy where the generator is triggered to centrally charge the battery module only when the controller detects that the engine load is at a preset high-efficiency load state. This reduces the increase in fuel consumption and has a significant fuel-saving effect (actual fuel saving rate can reach 15%-20%), greatly improving fuel economy.

[0088] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0089] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A range-extended backup power system for a fuel-powered refrigerated truck, characterized in that, The invention is applied to fuel-powered refrigerated trucks, which include an engine, a generator, a vehicle compressor, and a refrigeration system. The engine is connected to both the generator and the vehicle compressor, and the vehicle compressor is also connected to the refrigeration system. The range-extended backup power system for fuel-powered refrigerated vehicles includes: a controller, a battery module, and a backup power compressor; the controller is connected to the engine and the generator respectively, the battery module is connected to the generator and the backup power compressor respectively, and the backup power compressor is also connected to the refrigeration system; When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the original vehicle compressor to operate in order to drive the refrigeration system. The controller is used to trigger the generator to charge the battery module when it detects that the engine load is in a preset high-efficiency load state. When the fuel-powered refrigerated truck is parked or traveling at low speed, the battery module is used to supply power to the backup compressor to drive the refrigeration system.

2. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 1, characterized in that, The fuel-powered refrigerated truck also includes the original vehicle battery and the original vehicle refrigeration unit controller, and the range-extended backup power system for the fuel-powered refrigerated truck also includes a voltage conversion module. The generator is connected to the voltage conversion module, the original vehicle battery, and the original vehicle cooling engine controller via a DC bus, and the voltage conversion module is also connected to the battery module. When the fuel-powered refrigerated truck is traveling at high speed, the engine drives the generator, which supplies power to the original vehicle battery and the original vehicle refrigeration controller. When the engine load is at the preset high-efficiency load state, the voltage output by the generator is processed by the voltage conversion module and then used to charge the battery module.

3. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 2, characterized in that, The voltage conversion module includes an inverter and a charger; One end of the inverter is connected to the generator and the original vehicle battery via the DC bus, and the other end of the inverter is connected to the charger, which is also connected to the battery module. The generator or the original vehicle battery charges the battery module through the inverter and the charger.

4. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 3, characterized in that, The voltage conversion module also includes a unidirectional DC-DC converter; One end of the unidirectional DC-DC converter is connected to the original vehicle battery and the original vehicle cooling engine controller via the DC bus, and the other end of the unidirectional DC-DC converter is connected to the battery module. The battery module supplies power to the original vehicle battery and the original vehicle cooling controller through the unidirectional DC-DC converter.

5. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 2, characterized in that, The voltage conversion module is a bidirectional DC-DC converter; One end of the bidirectional DC-DC converter is connected to the generator, the original vehicle battery, and the original vehicle cooling engine controller via the DC bus, and the other end of the bidirectional DC-DC converter is connected to the battery module. The generator or the original vehicle battery charges the battery module through the bidirectional DC-DC converter; The battery module supplies power to the original vehicle battery and the original vehicle cooling controller through the bidirectional DC-DC converter.

6. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 2, characterized in that, The range-extended backup power system for fuel-powered refrigerated vehicles also includes a photovoltaic module; The photovoltaic module is connected to the voltage conversion module via the DC bus, and the photovoltaic module is used to charge the battery module through the voltage conversion module.

7. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 6, characterized in that, The photovoltaic module includes a photovoltaic power generation unit and a photovoltaic control component; The photovoltaic power generation unit is connected to the photovoltaic control component, and the photovoltaic control component is also connected to the voltage conversion module through the DC bus; the photovoltaic control component is used to control the magnitude of the current output by the photovoltaic power generation unit.

8. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 1, characterized in that, The range-extended backup power system for fuel-powered refrigerated vehicles also includes a compressor controller; the compressor controller is connected to both the battery module and the backup power compressor. The compressor controller is used to convert the DC power output from the battery module into AC power and then output it to the backup compressor; The compressor controller is also used to monitor voltage and current parameters in real time. When an overvoltage or overcurrent abnormal condition is detected, the compressor controller triggers a protection switch to cut off the output.

9. The range-extended backup power system for fuel-powered refrigerated vehicles according to claim 8, characterized in that, The range-extended backup power system for fuel-powered refrigerated vehicles also includes a connector assembly, and the battery module includes multiple battery cells. Multiple battery cells are connected in series and / or in parallel according to the power consumption requirements of the fuel-powered refrigerated truck, and then connected to the compressor controller through the connector assembly.

10. A vehicle, characterized in that, The vehicle includes: an engine, a generator, a vehicle compressor, a refrigeration system, and a range-extended backup power system for fuel-powered refrigerated vehicles as described in any one of claims 1-9; The engine is connected to the generator and the original vehicle compressor respectively, and the original vehicle compressor is also connected to the refrigeration system; The range-extended backup power system for fuel-powered refrigerated vehicles is connected to the engine, the generator, and the refrigeration system, respectively.

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