Method and system for enhancing a vehicle energy supply and transportation climate control system

Abstract

A method for powering a climate control system for a vehicle-powered transportation. The method includes determining the amount of electrical power required by a load of the vehicle-powered transportation climate control system. The method also includes determining the amount of vehicle electrical power that can be obtained from a vehicle electrical network. And, the method includes calculating an amount of auxiliary electrical power from an auxiliary electrical network to increase the amount of vehicle electrical power from the vehicle electrical network. In addition, the method includes converting the electrical power from the vehicle electrical network and the electrical power from the auxiliary electrical network into load power and supplying the load power to the load of the vehicle-powered transportation climate control system. And, the maximum amount of vehicle electrical power that can be obtained from the vehicle electrical network is less than the maximum amount of electrical power required by the vehicle-powered transportation climate control system.

Description

Technical Field

[0001] The present disclosure relates to a vehicle-powered transport climate control system. More specifically, the present disclosure is directed to methods and systems for enhancing a vehicle-powered transport climate control system. Background Art

[0002] A transport climate control system may include, for example, a transport refrigeration system (TRS). The TRS is typically used to control environmental conditions (e.g., temperature, humidity, air quality, etc.) within the cargo space of a transport unit (e.g., a truck, a container (e.g., a container on a flatcar, an intermodal container, etc.), a van, a semi-trailer truck, a bus, or other similar transport unit). The TRS may maintain the environmental conditions of the cargo space to maintain cargo (e.g., agricultural products, frozen foods, pharmaceuticals, etc.). Summary of the Invention

[0003] The present disclosure relates to a vehicle-powered transport climate control system. More specifically, the present disclosure relates to methods and systems for enhancing a vehicle-powered transport climate control system.

[0004] Regulations to reduce emissions (e.g., particulate matter emissions, nitrogen oxide emissions, noise emissions, etc.) from, for example, vehicle prime movers (e.g., internal combustion engines such as diesel engines) have led to the electrification of components within a vehicle and an increase in emission reduction components (e.g., emission control devices, start-stop systems, etc.) within the space between the vehicle machines and the prime mover in the vehicle power compartment. The vehicle power compartment may also include a start-stop system, for example, that can shut down the prime mover (i.e., the prime mover is not operating) when the vehicle is stopped at a traffic light, parked at a store, etc. Thus, the amount of space available for other components between the vehicle machines and the prime mover in the vehicle power compartment is becoming smaller. For example, this reduced space may make it difficult to provide a separate compressor that is coupled (or connected, or mounted) to the prime mover in the vehicle power compartment to provide a high cooling power load and supplement the vehicle-powered transport climate control system. Additionally, for example, this reduced space may make it difficult to provide a separate energy source (e.g., prime mover, fuel cell, battery source, etc.) in the vehicle power compartment that is dedicated to powering the vehicle-powered transport climate control system.

[0005] Embodiments described herein relate to a vehicle-powered transport climate control system in which the power provided by the vehicle (i.e., the vehicle electrical network) is never sufficient to fully power a vehicle-powered transport climate control system operating at full performance. The power system may utilize power from an auxiliary electrical network to increase the power provided by the vehicle (i.e., the vehicle electrical network) to power the vehicle-powered transport climate control system.

[0006] In one embodiment, a method is provided for powering a vehicle - energized transport climate control system that includes a vehicle power network and an auxiliary power network. The method includes determining the amount of electrical power required by the load of the vehicle - energized transport climate control system. The method also includes determining the amount of vehicle electrical power that can be obtained from the vehicle power network. Additionally, the method includes calculating an amount of auxiliary electrical power from the auxiliary power network to increase the amount of vehicle electrical power from the vehicle power network. Further, the method includes converting the electrical power from the vehicle power network and the electrical power from the auxiliary power network into load power and providing the load power to the load of the vehicle - energized transport climate control system. Moreover, the maximum amount of vehicle electrical power that can be obtained from the vehicle power network is less than the maximum amount of electrical power required by the vehicle - energized transport climate control system.

[0007] In another embodiment, a refrigerated transport unit is provided. The refrigerated transport unit includes a vehicle - energized transport climate control system for providing climate control to an interior space of the refrigerated transport unit and a power system for powering the vehicle - energized transport climate control system. The vehicle - energized transport climate control system includes a refrigeration circuit that includes a compressor, an evaporator, a condenser, and an expansion valve. The power system includes a power conversion module and a controller. The power conversion module is configured to receive electrical power from the vehicle power network and the auxiliary power network, where the vehicle power network is configured to power a vehicle that towes the refrigerated transport unit. The controller is configured to determine the amount of electrical power required by the load of the vehicle - energized transport climate control system, determine the amount of vehicle electrical power that can be obtained from the vehicle power network, and calculate an amount of auxiliary electrical power from the auxiliary power network to increase the amount of vehicle electrical power from the vehicle power network. The power conversion module is also configured to convert the electrical power from the vehicle power network and the electrical power from the auxiliary power network into load power and is configured to provide the load power to the load of the vehicle - energized transport climate control system. Moreover, the maximum amount of vehicle electrical power that can be obtained from the vehicle power network is less than the maximum amount of electrical power required by the load of the vehicle - energized transport climate control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following will be described with reference to the accompanying drawings, which form a part of this disclosure and illustrate embodiments in which the systems and methods described herein may be practiced.

[0009] Figure 1A A side view of a truck with a vehicle - energized transport climate control system according to one embodiment is shown.

[0010] Figure 1B A side view of a van with a vehicle - energized transport climate control system according to one embodiment is shown.

[0011] Figure 2Schematic block diagram showing an embodiment of a power system for powering a vehicle - energized transport climate control system according to one embodiment.

[0012] Figure 3 Flowchart showing a method for powering a vehicle - energized transport climate control system according to one embodiment.

[0013] Like reference numerals throughout the specification represent like parts. DETAILED DESCRIPTION

[0014] This disclosure relates to vehicle - energized transport climate control systems. More particularly, this disclosure relates to methods and systems for enhancing vehicle - energized transport climate control systems.

[0015] As defined herein, a vehicle - energized transport climate control system is a transport climate control system that does not have its own power source (e.g., a prime mover, a battery source, etc.) that can exclusively power the transport climate control system when the transport climate control system is operating at full performance. This vehicle - energized transport climate control system mainly relies on power from the vehicle (i.e., the vehicle power network) to power the vehicle - energized transport climate control system.

[0016] In some embodiments, the vehicle - energized transport climate control system may include a transport refrigeration unit that does not have sufficient space to accommodate a prime mover.

[0017] As defined herein, "low voltage" refers to Class A of ISO 6469 - 3 standard in an automotive environment. Specifically, the maximum operating voltage is between 0V direct current (DC) voltage and 60V DC voltage or between 0V alternating current (AC) voltage and 30V AC voltage.

[0018] As defined herein, "high voltage" refers to Class B of ISO 6469 - 3 standard in an automotive environment. Specifically, the maximum operating voltage is between 60V DC voltage and 1500V DC voltage or between 30V AC voltage and 1000V AC voltage.

[0019] As defined herein, "under - powered vehicle network power" or "vehicle network power that cannot provide sufficient power" means that the maximum power obtainable from the vehicle power network is always insufficient to enable the vehicle - energized transport climate control system to operate at full performance.

[0020] As defined herein, the performance - limited mode is an operating mode of the vehicle - energized transport climate control system in which, to reduce the power demand of the vehicle - energized transport climate control system, the speed of at least one of the compressor, one or more evaporator fans, and one or more condenser fans is reduced.

[0021] Figure 1ADepicts a climate-controlled straight truck 11, which includes an air-conditioned loading space 12 for carrying goods. The truck 11 includes a vehicle-powered transport climate control system 5. The vehicle-powered transport climate control system 5 includes a transport refrigeration unit (TRU) 14 mounted on the front wall 16 of the loading space 12.

[0022] The transport refrigeration unit (TRU) 14 includes a refrigeration circuit (not shown), which, for example, includes a compressor, a condenser, an evaporator, and an expansion valve. The transport refrigeration unit (TRU) 14 may also include a heater, one or more evaporator fans, one or more condenser fans, one or more solenoid valves, etc., which help to provide climate control (temperature, humidity, air quality, etc.) for the air-conditioned loading space 12. The transport refrigeration unit (TRU) 14 is controlled by a controller 15 to provide climate control within the loading space 12. It can be understood that the transport refrigeration unit (TRU) 14 does not have enough space to accommodate a power source (e.g., a prime mover, a battery power source, a fuel cell, etc.) that can exclusively power the vehicle-powered transport climate control system 5.

[0023] The truck 11 also includes a vehicle power compartment 18, which houses a prime mover 21, for example, an internal combustion engine (e.g., a diesel engine, etc.), and the prime mover 21 provides power to move the truck 11 and operate the vehicle-powered transport climate control system 5. The prime mover 21 may work together with an optional machine 22 (e.g., an alternator, a generator, etc.) to power the vehicle-powered transport climate control system 5.

[0024] In some embodiments, the truck 11 may be a hybrid vehicle powered by a combination of the prime mover 21 and a battery power source (not shown), or may be an electrically driven truck in which the prime mover 21 is replaced by an electric power source (e.g., a battery power source).

[0025] It can be understood that the power sources of the truck 11 (e.g., the prime mover 21, the optional machine 22, the electric power source, etc.) cannot exclusively power the vehicle-powered transport climate control system 5 when the vehicle-powered transport climate control system 5 is operating at full performance.

[0026] Although Figure 1A a climate-controlled straight truck 11 is shown, it should be understood that the embodiments described herein can also be applied to any other type of transport unit, including but not limited to containers (e.g., containers on flatcars, intermodal containers, etc.), vans, or other similar transport units.

[0027] Figure 1BDepicts a temperature-controlled van 80, which includes an air-conditioned loading space 82 (or interior space) for carrying goods. The van 80 includes a vehicle-powered transport climate control system 75. The vehicle-powered transport climate control system 75 includes a transport refrigeration unit (TRU) 85 mounted on the ceiling 84 of the loading space 82. The transport refrigeration unit (TRU) 85 is controlled by a controller 83 to provide climate control (e.g., temperature, humidity, air quality, etc.) within the loading space 82. It can be understood that the transport refrigeration unit (TRU) 85 does not have sufficient space to accommodate a power source (e.g., a prime mover, a battery power source, a fuel cell, etc.) that can specifically power the vehicle-powered transport climate control system 75.

[0028] The van 80 also includes a vehicle power compartment 86, which houses a prime mover 87, e.g., an internal combustion engine (e.g., a diesel engine, etc.), which provides power to move the van 80 and operate the vehicle-powered transport climate control system 75. In some embodiments, the prime mover 87 can work together with an optional machine 88 (e.g., an alternator, a generator, etc.) to operate the vehicle-powered transport climate control system 75. Additionally, in some embodiments, the van 80 can be a hybrid vehicle powered by a combination of the prime mover 87 and a battery power source (not shown), or can be an electric-driven truck that replaces the prime mover 87 with an electric power source (e.g., a battery power source).

[0029] It can be understood that the power sources (e.g., the prime mover 87, the optional machine 88, the electric power source, etc.) of the van 80 cannot exclusively power the vehicle-powered transport climate control system 75 when the vehicle-powered transport climate control system 75 is operating at full performance.

[0030] Figure 2 Shows a schematic block diagram of an embodiment of an electrical system 200 for powering a vehicle-powered transport climate control system. The electrical system 200 can power Figure 1A and 1B the vehicle-powered transport climate control systems 5, 75 shown. The electrical system 200 is configured to work with prime mover-powered vehicles. However, it can be understood that the electrical system 200 can also be configured to work with electric vehicles powered by energy storage devices (e.g., one or more batteries), and / or hybrid vehicles powered by a combination of a prime mover and an energy storage device.

[0031] As Figure 2 shown, the electrical system 200 includes a vehicle electrical network 204, an auxiliary electrical network 206, a utility power grid 208, and a transport climate control load network 212 connected to a power conversion module 240.

[0032] The power system 200 can utilize auxiliary network power from the auxiliary power network 206 via the power conversion module 240 to increase the vehicle network power that cannot be sufficiently supplied by one or more energy sources of the vehicle power network 204, so as to power the transport climate control load network 212. The one or more energy sources can include the vehicle battery 210 and the vehicle machine 205 via the vehicle power network 204, and one or more auxiliary batteries 230 via the auxiliary power network 206. The loads can be, for example, the compressor 255, one or more evaporator blowers 265, one or more condenser fans 270, the heater 275, and the controller 260 of the vehicle-powered transport climate control system. The loads can also include, for example, one or more sensors of the transport climate control system, one or more valves, one or more solenoid valves, etc. It can be understood that in some embodiments, the compressor 255 may require the most electrical power of the vehicle-powered transport climate control system.

[0033] The vehicle power network 204 is configured to provide insufficiently powered vehicle network power to the power conversion module 240. The vehicle power network 204 includes the vehicle battery 210 and the vehicle machine 205. The vehicle battery 210 can be used, for example, to start the vehicle prime mover, running lights, power vehicle accessory components, etc. In some embodiments, the vehicle battery 210 can also be used to power components of the transport climate control load network 212. It can be understood that the vehicle network power provided by the vehicle power network 204 can be inconsistent and based on the operation of the vehicle and the vehicle load demand. Therefore, the vehicle network power can fluctuate continuously. In addition, it can be understood that the maximum vehicle network power that the power system 200 can obtain will never be sufficient to operate the vehicle-powered transport climate control system at full performance.

[0034] The vehicle machine 205 can be a generator capable of providing DC power to the vehicle. In some embodiments, the vehicle machine 205 can include an alternator and a rectifier or an AC-DC (alternating current - direct current) converter (not shown) that rectifies or converts AC power into DC power.

[0035] It can be understood that in an electric vehicle, the above-mentioned machine may not be present. The electric vehicle may include an electric generator and a high-voltage (e.g., between 60V and 1500V, such as 400V, 800V, etc.) DC battery to operate the vehicle. The electric vehicle can also provide a relatively high-voltage (e.g., 400V, 800V, etc.) DC power supply (e.g., battery pack, rechargeable energy storage system (RESS), etc.). The electric vehicle may include one or more DC-DC converters (e.g., two DC-DC converters) to convert the relatively high voltage (e.g., 400V, 800V, etc.) to a low voltage (e.g., in the range between 0V and 60V, such as 12V). That is, the vehicle machine 205 can be replaced by a DC-DC converter having parameters similar to those of the vehicle machine 205 so as to be able to supply vehicle network power, which is insufficient in power supply, to the power conversion module 240. The insufficient vehicle network power can be used to drive vehicle accessory components (e.g., electronic communication devices, cabin lights, main and / or secondary Heating Ventilation and Air Conditioning (HVAC) systems, main and / or secondary HVAC fans, sunshades for vehicle windows / windshields, cabin accessories, etc.).

[0036] In some embodiments, the converted low voltage (e.g., 12V) from the vehicle power network 204 can be provided to the power conversion module 240 for powering the transportation climate control load network 212. In some embodiments, for example, the electric vehicle can provide 7 kilowatt-hours of power from a 45-kilowatt-hour memory of the vehicle power network 204 to the power conversion module 240 to operate the transportation climate control load network 212. It can be understood that the embodiments disclosed herein relate to a low-voltage (e.g., 12V) system. The embodiments disclosed herein can use the output power (e.g., electric Power Take Off (ePTO)) from the low-voltage (e.g., 12V) system for loads such as vehicle accessory components and / or the power conversion module 240. The high-voltage power supply can provide the power for driving the vehicle (e.g., transmission power output), so that the power system 200 herein can not obtain power from the high-voltage system.

[0037] It can be understood that in a hybrid vehicle, there may be a machine (e.g., the vehicle machine 205) and / or a low-voltage DC power supply that can provide a low voltage (e.g., 12V) to the power conversion module 240.

[0038] It will be appreciated that any type of power source from the vehicle that can supply power to the power system 200 can be part of the vehicle power network 204. For example, this can include vehicle machines 205, vehicle batteries 210, rechargeable energy storage systems (RESS), generators, shaft-mounted generators, power take-off (PTO) devices, or ePTO devices with auxiliary converters, etc.

[0039] In some embodiments, a voltage sensor (not shown) can be provided in the vehicle power network 204 to monitor the vehicle voltage supplied to the power conversion module 240. Additionally, in some embodiments, a current sensor (not shown) can be provided to monitor the current flowing to the power conversion module 240.

[0040] The auxiliary power network 206 includes a battery source 230 and a battery management system 235. In some embodiments, the auxiliary power network 206 can be part of a vehicle-powered transport climate control system and is likely to be housed within a transport refrigeration unit. In other embodiments, the auxiliary power network 206 can be external to the vehicle-powered transport climate control system and be part of the vehicle power network 204. And in some other embodiments, the auxiliary power network 206 can be external to the vehicle-powered transport climate control system and external to the vehicle power network 204. For example, the auxiliary power network 206 can be part of an auxiliary power unit (APU) installed on the vehicle.

[0041] In some embodiments, the battery source 230 can include one or more batteries. For example, in one embodiment, the battery source 230 can include two batteries (not shown). Each battery can also be connected to the power conversion module 240. It will be appreciated that the battery source 230 itself is capable of providing sufficient energy to power the transport climate control load network 212. In some embodiments, the battery source 230 can provide 12V DC voltage or 24V DC voltage. In other embodiments, the battery source 230 can provide 48V DC voltage.

[0042] The battery management system 235 is configured to monitor the charge of one or more batteries of the battery source 230 and charge one or more batteries of the battery source 230. The battery management system 235 can communicate with, for example, the controller 260 and / or the controller (not shown) of the power conversion module 240 to provide the charge of one or more batteries of the battery source 230. Additionally, the battery management system 235 can receive instructions from, for example, the controller 260 and / or the controller of the power conversion module 240 that indicate the amount of power that the battery source 230 should supply to the power conversion module 240.

[0043] The power conversion module 240 is configured to convert power from both the vehicle power network 204 and the auxiliary power network 206 into load power compatible with one or more loads of the transport climate control load network 212. That is, the power conversion module 240 is configured to step down or step up the power from the vehicle power network 204, and is configured to step down or step up the power from the auxiliary power network 206 to obtain the desired load power. In some embodiments, the power conversion module 240 may include one or more DC / DC converters. For example, the power conversion module 240 may include a first DC / DC converter that converts under-powered vehicle network power into a voltage compatible with one or more loads of the transport climate control load network 212, and a second DC / DC converter that converts auxiliary network power into a voltage compatible with one or more loads of the transport climate control load network 212. The converted power from the vehicle power network 204 and the converted power from the auxiliary power network 206 are combined to obtain load power compatible with one or more loads of the transport climate control load network 212. Then, the load power output by the power conversion module 240 is provided to the transport climate control load network 212 via the load DC bus 202. In some embodiments, the load power may be low-voltage DC power (e.g., between 0 - 60V DC voltage). In other embodiments, the load power may be high-voltage DC power (e.g., between 60 - 1500V DC voltage).

[0044] In some embodiments, the power conversion module 240 may include a controller (not shown) configured to monitor and control the power conversion module 240. In some embodiments, the controller may communicate with the controller 260.

[0045] The power system 200, particularly the power conversion module 240, is controlled by the controller 260 of the transport climate control load network 212. For example, the controller 260 may be Figure 1A the controller 15 shown or Figure 1B the controller 83 shown. In some embodiments, the power conversion module 240 may monitor the amount of current and / or voltage provided by the vehicle power network 204. Additionally, in some embodiments, the power conversion module 240 may monitor the amount of current and / or voltage consumed by components of the transport climate control load network 212. The power conversion module 240 may be configured to communicate the amount of current and / or voltage provided by the vehicle power network 204 and the amount of current and / or voltage consumed by components of the transport climate control load network 212.

[0046] Components of the transport climate control load network 212 can be, for example, part of a transport refrigeration unit (TRU) mounted to the body of a vehicle (e.g., a truck, van, etc.). In some embodiments, the transport refrigeration unit (TRU) can be located above the truck cab, as Figure 1A shown. In another embodiment, the transport refrigeration unit (TRU) can be located on top of the transport unit (TU) (e.g., on top of the box where the external condenser is located) (see Figure 1B ). In some embodiments, components of the transport climate control load network 212 can be DC-powered components. In some embodiments, components of the transport climate control load network 212 can be AC-powered components. In some embodiments, the transport climate control load network 212 can include both DC-powered components and AC-powered components.

[0047] As Figure 2 shown, the transport climate control load network 212 includes a compressor 255, one or more evaporator blowers 265, one or more condenser fans 270, a heater 275, and a controller 260. The transport climate control load network 212 also includes an inverter 250 configured to boost the load power and convert the boosted load power to AC load power. That is, the inverter 250 is configured to boost the power from the DC load bus 202 and convert the power to AC power to drive the compressor 255. In some embodiments, the inverter 250 can convert the load power to high-voltage AC power. As Figure 2 shown, the inverter 250 is configured to power the compressor 255 and an optional heater 275. It should be understood that in other embodiments, the inverter 250 can power other components of the transport climate control load network 212 (e.g., one or more evaporator blowers 265, one or more condenser fans 270, etc.). In some embodiments, the inverter 250 can be a Compressor Drive Module (CDM).

[0048] In some embodiments, the inverter 250 can convert a low-voltage DC voltage (e.g., 12V DC voltage, 24V DC voltage, 48V DC voltage) from the load DC bus 202 and provide an AC voltage (e.g., three-phase 230V AC voltage, three-phase 460V AC voltage, etc.) to drive the compressor 255. In particular, the inverter 250 drives the compressor 255 to meet the requirements of the transport climate control system.

[0049] The load DC bus 202 is connected to and powers each of the inverter 250, one or more evaporator blowers 265, one or more condenser fans 270, the heater 275, and the controller 260. It can be understood that the inverter 250 with the compressor 255 may require the maximum power among the various loads of the transportation climate control load network 212. As Figure 2 shown, in some embodiments, the inverter 250 can also power the heater 275.

[0050] The utility grid 208 is configured to charge the battery source 230 of the auxiliary power network 206 when the vehicle is parked and connected to the utility power supply 220. In some embodiments, the utility grid 208 can also power the operation of the transportation climate control load network 212 when the vehicle is parked and connected to the utility power supply 220. The utility grid 208 includes an AC-DC converter 225. The utility power supply (e.g., shore power, etc.) 220 can be connected to the AC-DC converter 225 to provide an AC voltage input to the AC-DC converter 225. The AC-DC converter 225 converts the AC power from the utility power supply 220 and provides the converted DC power to the power conversion module 240.

[0051] Although Figure 2 a single AC-DC converter 225 is shown, it can be understood that in other embodiments, the power system 200 can include two or more AC-DC converters. In embodiments where there are two or more AC-DC converters, each of the AC-DC converters can be connected to the utility power supply 220 to provide additional power capacity to the power system 200. In some embodiments, each AC-DC converter can provide a different amount of electric power. In some embodiments, each AC-DC converter can provide the same amount of electric power.

[0052] In some embodiments, the utility power supply 220 can be directly connected to the compressor 255 and power the driving of the compressor 255, thus bypassing the inverter 250. In some embodiments, the inverter 250 can be used as an AC-DC converter and convert the power received from the utility power supply 220 into DC power that can be provided by the inverter 250 to the load DC bus 202.

[0053] In some embodiments, compressor 255 may be a variable speed compressor. In some embodiments, compressor 255 may require, for example, 1 KW of power to operate. In some embodiments, one or more evaporator blowers 265 may require, for example, 100 W of power to operate. In some embodiments, one or more condenser fans 270 may require, for example, 130 W of power to operate. In some embodiments, heater 275 may require, for example, 1200 W of power to operate. Additionally, in some embodiments, heater 275 may be configured to receive power from compressor drive module (CDM) 250. Although Figure 2 the compressor 255 shown in

[0054] is powered by AC power, it is understood that in other embodiments, compressor 255 may be powered by DC power.

[0055] Controller 260 is configured to monitor and control the operation of the vehicle - powered transportation climate control system. In particular, controller 260 may control the operation of compressor 255, heater 275, one or more condenser fans 270, one or more evaporator blowers 265, and any other components of the vehicle - powered transportation climate control system. In some embodiments, controller 260 may monitor the amount of electrical power consumed by the components of the transportation climate control load network 212. Controller 260 may also be configured to control power system 200. The control of power system 200 is discussed below with reference to Figure 3 discussion of the control of power system 200.

[0056] Figure 3 FIG. shows a flowchart of a method 300 for powering a vehicle - powered transportation climate control system (e.g., vehicle - powered transportation climate control systems 5, 75), particularly the transportation climate control load network 212, according to one embodiment.

[0057] As discussed below, method 300 is executed by controller 260. However, in other embodiments, method 300 may be executed by the controller of power conversion module 240, battery management system 235, or a separate controller of power system 200. Additionally, in some embodiments, method 300 may be executed by any combination of controller 260, the controller of power conversion module 240, battery management system 235, and a separate controller of power system 200.

[0058] The method starts simultaneously from 305 and 310. At 305, the controller 260 determines the amount of electrical power required by the transport climate control load network 212. In some embodiments, the controller 260 may determine the amount of electrical power required by the transport climate control load network 212 based on the current operating mode of the vehicle-powered transport climate control system. That is, based on the current operating mode, the controller 260 may determine the amount of electrical power required by the compressor 255, the heater 275, one or more condenser fans 270, and one or more evaporator blowers 265. For example, the controller 260 may use a look-up table, analog data, etc. to determine how much electrical power each component of the transport climate control load network 212 requires to operate in the current operating mode.

[0059] At 310, the controller 260 determines the amount of electrical power that can be obtained from the auxiliary power network 206. In some embodiments, this includes determining the charge amount of the battery source 230. In some embodiments, the controller 260 may receive this charge amount from the battery management system 235.

[0060] Once the controller 260 determines the required amount of electrical power at 305 and the amount of electrical power that can be obtained from the auxiliary power network 206 at 310, the method proceeds to 315, although Figure 3 shown as 305 and 310 being executed simultaneously, it can be understood that in other embodiments, 305 and 310 may be executed sequentially in any order.

[0061] At 315, the controller 260 determines whether vehicle network power from the vehicle power network 204 is available for the power system 200. In some embodiments, the controller 260 may receive information from the power conversion module 240 that indicates that vehicle network power is being provided by the vehicle network power network 204. In some embodiments, the controller 260 may receive information from the vehicle power network 204 and / or one or more sensors of the vehicle to determine whether vehicle network power from the vehicle power network 204 is available. When vehicle network power from the vehicle power network 204 is available, method 300 proceeds to 320. When vehicle network power from the vehicle power network 204 is not available, method 300 proceeds to 325.

[0062] At 320, the controller 260 determines the amount of vehicle electrical power provided to the power system 200 by the vehicle electrical network 204. The power system 200 may not be able to control the amount of vehicle electrical power provided by the vehicle. Additionally, it can be understood that when the vehicle is in transit, the amount of vehicle electrical power can fluctuate. For example, the vehicle's power source can generate, for example, 2 - 5 KW of power at any given time during operation, but can only provide a certain amount of power to the vehicle electrical network 204 based on the vehicle's operating conditions. In some embodiments, the controller 260 can receive information from the power conversion module 240 that indicates the amount of vehicle electrical power provided to the power system 200 by the vehicle electrical network 204. In some embodiments, the controller 260 can receive information from the vehicle electrical network 204 and / or one or more sensors of the vehicle to determine the amount of vehicle electrical power provided to the power system 200 by the vehicle electrical network 204. Then, method 300 proceeds to 330.

[0063] At 330, the controller 260 determines whether the amount of vehicle electrical power determined at 320 is equal to or higher than a desired power threshold. The desired power threshold can be a pre - determined value stored in the memory that indicates the desired amount of electrical power that should be obtainable from the vehicle electrical network 204 for a particular vehicle in transit. In some embodiments, the desired power threshold can be, for example, 1 KW. It can be understood that when the vehicle network electrical power reaches or exceeds the desired power threshold, the power system 200 can utilize power from the auxiliary power network 206 to increase the electrical power provided by the vehicle electrical network 204, thereby enabling the vehicle's energy - supplying transport climate control system to operate at full performance. When the amount of vehicle network electrical power provided by the vehicle electrical network 204 is equal to or higher than the desired power threshold, method 300 proceeds to 335. When the amount of vehicle network electrical power provided by the vehicle electrical network 204 is lower than the desired power threshold, method 300 proceeds to 365.

[0064] At 335, the controller 260 calculates the amount of auxiliary electrical power that the auxiliary power network 206 will provide in order to increase the amount of electrical power obtainable from the vehicle electrical network 204 to meet the amount of electrical power required by the transport climate control load network 212. In some embodiments, the controller 260 can calculate the auxiliary electrical power based on the amount of vehicle electrical power obtainable from the vehicle electrical network 204 (determined at 320) and the amount of electrical power required by the transport climate control load network 212 (determined at 305). Then, method 300 proceeds to 340.

[0065] At 340, the controller 260 instructs the auxiliary power network 206 (e.g., the battery storage system 235) to increase the vehicle electrical power by providing the amount of auxiliary electrical power provided by the battery source 230, determined at 335, to the power conversion module 240. Then, method 300 proceeds to 345.

[0066] At 345, the power conversion module 240 is configured to convert the power provided by the vehicle power network 204 and the power provided by the auxiliary power network 206 into load power compatible with one or more loads of the transport climate control load network 212. Converting the power provided by the vehicle power network 204 and the power provided by the auxiliary network 206 into load power includes converting the power from the vehicle power network from the vehicle network voltage to the load power voltage, and converting the power from the auxiliary power network from the auxiliary network voltage to the load power voltage. In some embodiments, this may include converting the power from the vehicle power network from the vehicle network DC voltage to the load power DC voltage, and converting the power from the auxiliary power network from the auxiliary network DC voltage to the load power DC voltage.

[0067] At 350, the power conversion module 240 provides load power to the transport climate control load network 212 via the load DC bus 202. In some embodiments, a portion of the load power provided to the load DC bus 220 may be sent to the inverter 250 to boost this portion of the load power and convert the boosted load power into AC power to drive one or more components of the transport climate control load network 212 (including, for example, one or more of the compressor 255 and the heater 275). Then, method 300 may return to 305, 310.

[0068] At 325, the controller 260 determines whether the auxiliary power network 206 is capable of providing sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode. When the auxiliary power network 206 is capable of providing sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, the method proceeds to 355. When the auxiliary power network 206 is not capable of providing sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, the method proceeds to 360.

[0069] At 355, the controller 260 powers the vehicle - energized transport climate control load network 212 so that the vehicle - energized transport climate control system can operate in a performance - limited mode. In particular, the controller 260 can instruct the vehicle - energized transport climate control system to operate in a performance - limited mode. The controller 260 can also instruct the auxiliary power network 206 (e.g., the battery storage system 235) to supply power from the battery source 230 to the power conversion module 240. The amount of power provided by the auxiliary power network 206 can be based on the amount of power required for the vehicle - energized transport climate control system to operate in a performance - limited mode. Then, the power conversion module 240 can convert the power received from the auxiliary power network 206 and any power received from the vehicle power network 204 into load power compatible with one or more loads of the transport climate control load network 212. Then, the power conversion module 240 can provide the load power to the transport climate control load network 212 via the load DC bus 202. In some embodiments, the controller 260 can send or display a notification to the user or customer that the vehicle - energized transport climate control system is operating in a performance - limited mode, and optionally, can warn the user or customer that after a certain time, the power system 200 may not have enough power to operate the vehicle - energized transport climate control system. Then, method 300 can return to 305, 310.

[0070] At 360, the controller 260 is configured to stop the operation of the power system 200 and / or the vehicle - energized transport climate control system and send or display a notification or alert to the user or customer that there is not enough power available to operate the vehicle - energized transport climate control system. Then, method 300 can return to 305, 310.

[0071] At 365, the controller 260 determines whether the vehicle power network 204 in combination with the auxiliary power network 206 can provide enough power to operate the vehicle - energized transport climate control system in a performance - limited mode. When the vehicle power network 204 in combination with the auxiliary power network 206 can provide enough power to operate the vehicle - energized transport climate control system in a performance - limited mode, the method proceeds to 355. When the vehicle power network 204 in combination with the auxiliary power network 206 cannot provide enough power to operate the vehicle - energized transport climate control system in a performance - limited mode, the method proceeds to 360.

[0072] Thus, the method 300 can allow the power system 200 to utilize the power provided by the auxiliary power network 204 to augment the power provided by the vehicle power network 204, thereby powering the vehicle - energized transport climate control system. Although the vehicle power network 204 has never provided enough power to fully power the vehicle - energized transport climate control system for full - performance operation.

[0073] Aspect:

[0074] It should be understood that any one of aspects 1-9 can be combined with any one of aspects 10-18.

[0075] Aspect 1, A method for powering a vehicle energy transport climate control system of a refrigerated transport unit using a vehicle power network and an auxiliary power network, the vehicle power network powering a vehicle towing the refrigerated transport unit, the method comprising:

[0076] Determining the amount of electrical power required by the load of the vehicle energy transport climate control system;

[0077] Determining the amount of vehicle electrical power that can be obtained from the vehicle power network;

[0078] Calculating the amount of auxiliary electrical power from the auxiliary power network to increase the amount of vehicle electrical power from the vehicle power network;

[0079] Converting the electrical power from the vehicle power network and the electrical power from the auxiliary power network into load electrical power; and

[0080] Providing the load electrical power to the load of the vehicle energy transport climate control system,

[0081] wherein the maximum amount of vehicle electrical power that can be obtained from the vehicle power network is less than the maximum amount of electrical power required by the load of the vehicle energy transport climate control system.

[0082] Aspect 2, The method according to aspect 1, wherein converting the electrical power from the vehicle power network and the electrical power from the auxiliary power network into load electrical power includes converting the electrical power from the vehicle power network from the vehicle network voltage to the load electrical power voltage, and converting the electrical power from the auxiliary power network from the auxiliary network voltage to the load electrical power voltage.

[0083] Aspect 3, The method according to any one of aspects 1 and 2, wherein converting the electrical power from the vehicle power network and the electrical power from the auxiliary power network into load electrical power includes converting the electrical power from the vehicle power network from the vehicle network DC voltage to the load electrical power DC voltage, and converting the electrical power from the auxiliary power network from the auxiliary network DC voltage to the load electrical power DC voltage.

[0084] Aspect 4, The method according to any one of aspects 1-3, further comprising determining whether the vehicle network electrical power from the vehicle power network is available for the vehicle energy transport climate control system, and

[0085] When the vehicle network electrical power from the vehicle power network is not available, operating the vehicle energy transport climate control system in a performance-limited mode.

[0086] Aspect 5. The method according to aspect 4 further includes determining whether an auxiliary power network can provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, and

[0087] when the auxiliary power network cannot provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, stopping the operation of the vehicle-powered transport climate control system.

[0088] Aspect 6. The method according to any one of aspects 1-5 further includes determining whether the vehicle electrical power is equal to or higher than an expected power threshold, and

[0089] when the vehicle network power from the vehicle power network is not available, operating the vehicle-powered transport climate control system in a performance-limited mode.

[0090] Aspect 7. The method according to aspect 6 further includes determining whether the combination of the auxiliary power network and the vehicle power network can provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, and

[0091] when the combination of the auxiliary power network and the vehicle power network cannot provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, stopping the operation of the vehicle-powered transport climate control system.

[0092] Aspect 8. The method according to any one of aspects 1-7, wherein the load of the vehicle-powered transport climate control system includes one or more of a compressor, an evaporator blower, and a condenser fan.

[0093] Aspect 9. The method according to any one of aspects 1-8 further includes converting part of the load power into AC load power compatible with the AC load of the vehicle-powered transport climate control system and providing the AC load power to the AC load.

[0094] Aspect 10. A refrigerated transport unit towed by a vehicle, the refrigerated transport unit comprising:

[0095] A vehicle-powered transport climate control system for providing climate control to the interior space of the refrigerated transport unit, the vehicle-powered transport climate control system including:

[0096] A refrigeration circuit including a compressor, an evaporator, a condenser, and an expansion valve; and

[0097] A power system for powering the vehicle-powered transport climate control system, the power system including:

[0098] A power conversion module, configured to receive power from a vehicle power network and an auxiliary power network, the vehicle power network being configured to power a vehicle towing a refrigerated transport unit;

[0099] A controller, configured to:

[0100] Determine the amount of electrical power required by the load of the vehicle-powered transport climate control system,

[0101] Determine the amount of vehicle electrical power that can be obtained from the vehicle power network, and

[0102] Calculate the amount of auxiliary electrical power from the auxiliary power network to augment the vehicle electrical power from the vehicle power network;

[0103] Wherein, the power conversion module is configured to convert the power from the vehicle power network and the power from the auxiliary power network into load power;

[0104] Wherein, the power conversion module is configured to supply the load power to the load of the vehicle-powered transport climate control system, and

[0105] Wherein, the maximum amount of vehicle electrical power that can be obtained from the vehicle power network is less than the maximum amount of electrical power required by the load of the vehicle-powered transport climate control system.

[0106] Aspect 11. The refrigerated transport unit according to aspect 10, wherein the power conversion module is configured to convert the power from the vehicle power network from the vehicle network voltage to the load power voltage, and convert the power from the auxiliary power network from the auxiliary network voltage to the load power voltage.

[0107] Aspect 12. The refrigerated transport unit according to any one of aspects 10 and 11, wherein the power conversion module is configured to convert the power from the vehicle power network from the vehicle network DC voltage to the load power DC voltage, and convert the power from the auxiliary power network from the auxiliary network DC voltage to the load power DC voltage.

[0108] Aspect 13. The refrigerated transport unit according to any one of aspects 10 - 12, wherein the controller is configured to:

[0109] Determine whether the vehicle network power from the vehicle power network is available for the vehicle-powered transport climate control system, and

[0110] When the vehicle network power from the vehicle power network is not available, operate the vehicle-powered transport climate control system in a performance-limited mode.

[0111] Aspect 14. The refrigerated transport unit according to aspect 13, wherein the controller is configured to:

[0112] Determine whether the auxiliary power network can provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, and

[0113] When the auxiliary power network cannot provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, stop the operation of the vehicle-powered transport climate control system.

[0114] Aspect 15. The refrigerated transport unit according to any one of aspects 10-14, wherein the controller is configured to:

[0115] Determine whether the vehicle electrical power is equal to or higher than an expected power threshold, and

[0116] When the vehicle network power from the vehicle power network is not available, operate the vehicle-powered transport climate control system in a performance-limited mode.

[0117] Aspect 16. The refrigerated transport unit according to aspect 15, wherein the controller is configured to: determine whether the auxiliary power network in combination with the vehicle power network can provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, and

[0118] When the auxiliary power network in combination with the vehicle power network cannot provide sufficient electrical power to operate the vehicle-powered transport climate control system in a performance-limited mode, stop the operation of the vehicle-powered transport climate control system.

[0119] Aspect 17. The refrigerated transport unit according to any one of aspects 10-16, wherein the load of the vehicle-powered transport climate control system includes one or more of a compressor, an evaporator blower, and a condenser fan.

[0120] Aspect 18. The refrigerated transport unit according to any one of aspects 10-17, wherein the power conversion module is configured to:

[0121] Convert part of the load power into AC load power compatible with the AC load of the vehicle-powered transport climate control system, and

[0122] Provide the AC load power to the AC load.

[0123] The terms used in this specification are intended to describe particular embodiments and are not intended to be limiting. When the terms "comprising" and / or "including" are used in this specification, it means that the stated features, values, steps, operations, elements, and / or components exist, but do not exclude the existence or addition of one or more other features, values, steps, operations, elements, and / or components.

[0124] Regarding the above description, it should be understood that details may be changed without departing from the scope of the present disclosure, particularly in terms of the construction materials used and the shape, size, and arrangement of the components. The term "embodiment" as used in this specification may but does not necessarily refer to the same embodiment. This specification and the described embodiments are merely examples. Other and further embodiments may be designed without departing from its basic scope, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A method for powering a transport climate control system of a refrigerated transport unit using a vehicle electrical network and an auxiliary electrical network, where the vehicle electrical network powers the vehicle towing the refrigerated transport unit, the method comprising: Determine the amount of electric power required for the load of the vehicle's energy supply and transportation climate control system; Determine the amount of vehicle electric power that can be obtained from the vehicle's power network; Calculate the amount of auxiliary electric power from the auxiliary power network to increase the amount of vehicle electric power from the vehicle's power network; Convert the electric power from the vehicle's power network and the electric power from the auxiliary power network into load electric power; Supply the load electric power to the load of the vehicle's energy supply and transportation climate control system; Determine whether the amount of vehicle electric power is equal to or higher than the expected power threshold; And When the amount of vehicle electric power is equal to or higher than the expected power threshold, operate the vehicle's energy supply and transportation climate control system in full performance mode using the electric power from the vehicle's power network and the electric power from the auxiliary power network; Wherein, the maximum amount of vehicle electric power that can be obtained from the vehicle's power network when the vehicle's energy supply and transportation climate control system operates at full performance will never be sufficient to operate the vehicle's energy supply and transportation climate control system.

2. The method according to claim 1, characterized in that, Converting the electric power from the vehicle's power network and the electric power from the auxiliary power network into the load electric power includes: converting the electric power from the vehicle's power network from the vehicle network voltage to the load electric power voltage, and converting the electric power from the auxiliary power network from the auxiliary network voltage to the load electric power voltage.

3. The method according to claim 1 or 2, characterized in that, Converting the electric power from the vehicle's power network and the electric power from the auxiliary power network into the load electric power includes: converting the electric power from the vehicle's power network from the vehicle network DC voltage to the load electric power DC voltage, and converting the electric power from the auxiliary power network from the auxiliary network DC voltage to the load electric power DC voltage.

4. The method according to claim 1, characterized in that, Further includes: Determine whether the vehicle network power from the vehicle's power network is available for the vehicle's energy supply and transportation climate control system, and When the vehicle network power from the vehicle's power network is not available, operate the vehicle's energy supply and transportation climate control system in a performance-limited mode.

5. The method according to claim 4, characterized in that, Further includes: Determine whether the auxiliary power network can provide sufficient electric power to operate the vehicle's energy supply and transportation climate control system in the performance-limited mode, and When the auxiliary power network cannot provide sufficient electric power to operate the vehicle's energy supply and transportation climate control system in the performance-limited mode, stop the operation of the vehicle's energy supply and transportation climate control system.

6. The method according to claim 1 or 2, characterized in that, Further includes: When the vehicle network power from the vehicle's power network is not available, operate the vehicle's energy supply and transportation climate control system in a performance-limited mode.

7. The method according to claim 6, characterized in that, Further includes: Determine whether the combination of the auxiliary power network and the vehicle's power network can provide sufficient electric power to operate the vehicle's energy supply and transportation climate control system in the performance-limited mode, and When the combination of the auxiliary power network and the vehicle's power network cannot provide sufficient electric power to operate the vehicle's energy supply and transportation climate control system in the performance-limited mode, stop the operation of the vehicle's energy supply and transportation climate control system.

8. The method according to claim 1 or 2, characterized in that, The loads of the vehicle-powered transport climate control system include one or more of a compressor, an evaporator blower, and a condenser fan.

9. The method according to claim 1 or 2, characterized in that, It further includes: Converting part of the load power into AC load power compatible with the AC loads of the vehicle-powered transport climate control system and supplying the AC load power to the AC loads.

10. A refrigerated transport unit towed by a vehicle, the refrigerated transport unit comprising: A vehicle-powered transport climate control system for providing climate control to the interior space of the refrigerated transport unit, the vehicle-powered transport climate control system comprising: A refrigeration circuit including a compressor, an evaporator, a condenser, and an expansion valve; and A power system for powering the vehicle-powered transport climate control system, the power system comprising: A power conversion module configured to receive power from a vehicle power network and an auxiliary power network, the vehicle power network being configured to power a vehicle for towing the refrigerated transport unit; A controller configured to: Determine the amount of electrical power required by the loads of the vehicle-powered transport climate control system, Determine the amount of vehicle electrical power that can be obtained from the vehicle power network, Calculate the amount of auxiliary electrical power from the auxiliary power network to increase the amount of vehicle electrical power from the vehicle power network; Determine whether the amount of vehicle electrical power is equal to or higher than a desired power threshold, and When the amount of vehicle electrical power is equal to or higher than the desired power threshold, operate the vehicle-powered transport climate control system in a full-performance mode using the power from the vehicle power network and the power from the auxiliary power network; wherein the power conversion module is configured to convert the power from the vehicle power network and the power from the auxiliary power network into load power; wherein the power conversion module is configured to supply the load power to the loads of the vehicle-powered transport climate control system, and wherein the maximum amount of vehicle electrical power that can be obtained from the vehicle power network when the vehicle-powered transport climate control system is operating at full performance will never be sufficient to operate the vehicle-powered transport climate control system.

11. The refrigerated transport unit according to claim 10, characterized in that, The power conversion module is configured to: convert the power from the vehicle power network from a vehicle network voltage to a load power voltage, and convert the power from the auxiliary power network from an auxiliary network voltage to the load power voltage.

12. The refrigerated transport unit according to claim 10 or 11, characterized in that, The power conversion module is configured to: convert the power from the vehicle power network from a vehicle network DC voltage to a load power DC voltage, and convert the power from the auxiliary power network from an auxiliary network DC voltage to the load power DC voltage.

13. The refrigerated transport unit according to claim 10 or 11, characterized in that, The controller is configured to: Determine whether vehicle network power from the vehicle power network is available for the vehicle-powered transport climate control system, and When the vehicle network power from the vehicle power network is not available, operate the vehicle-powered transport climate control system in a performance-limited mode.

14. The refrigerated transport unit according to claim 13, characterized in that, The controller is configured to: Determine whether the auxiliary power network can provide sufficient electrical power to operate the vehicle-powered transport climate control system in the performance-limited mode, and When the auxiliary power network cannot provide sufficient electric power to operate the vehicle-powered transport climate control system in the performance-limited mode, the operation of the vehicle-powered transport climate control system is stopped.

15. The refrigerated transport unit according to claim 10 or 11, characterized in that, The controller is configured to: When the vehicle network power from the vehicle power network is unavailable, operate the vehicle-powered transport climate control system in the performance-limited mode.

16. The refrigerated transport unit according to claim 15, characterized in that, The controller is configured to: Determine whether the auxiliary power network in combination with the vehicle power network can provide sufficient electric power to operate the vehicle-powered transport climate control system in the performance-limited mode, and When the auxiliary power network in combination with the vehicle power network cannot provide sufficient electric power to operate the vehicle-powered transport climate control system in the performance-limited mode, stop the operation of the vehicle-powered transport climate control system.

17. The refrigerated transport unit according to claim 10 or 11, characterized in that, The load of the vehicle-powered transport climate control system includes one or more of a compressor, an evaporator blower, and a condenser fan.

18. The refrigerated transport unit according to claim 10 or 11, characterized in that, The power conversion module is configured to: Convert part of the load power into AC load power compatible with the AC load of the vehicle-powered transport climate control system, and Provide the AC load power to the AC load.

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