Hybrid refrigerated truck high-voltage power supply system and control method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING FOTONDAIMLER AUTOMOTIVE
- Filing Date
- 2026-04-08
- Publication Date
- 2026-06-09
Smart Images
Figure CN122165879A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicles, and in particular to a high-voltage power supply system for a hybrid refrigerated truck, as well as a control method for the hybrid refrigerated truck and its high-voltage power supply system. Background Technology
[0002] In existing refrigerated trucks, the main vehicle and the refrigerated container are independent, and there is no unified high-voltage power supply system for energy management between the two, so the energy consumption of the whole vehicle cannot be further optimized. Summary of the Invention
[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a high-voltage power supply system for a hybrid refrigerated truck. This system can control the connection status between the main vehicle's high-voltage system and the refrigerated compartment's power module through a connection switch system, enabling unified energy management of both the main vehicle's high-voltage system and the refrigerated compartment's high-voltage system, thereby optimizing the overall vehicle energy consumption.
[0004] The second objective of this invention is to propose a hybrid refrigerated truck.
[0005] The third objective of this invention is to propose a control method for a high-voltage power supply system of a hybrid refrigerated truck.
[0006] To address the aforementioned problems, a first aspect of the present invention provides a high-voltage power supply system for a hybrid refrigerated truck, comprising: a main vehicle high-voltage system located in the main vehicle of the hybrid refrigerated truck, the main vehicle high-voltage system including a first power battery power supply section and a drive power generation section, the first power battery power supply section and the drive power generation section being selectively connected; and a refrigerated compartment high-voltage system located in the refrigerated compartment of the hybrid refrigerated truck, the refrigerated compartment high-voltage system including a second power battery power supply section, the second power battery power supply section being connected to a refrigerated compartment power module. A connection is provided for supplying power to the refrigerator compartment power module; a high-voltage connection system is provided for connecting the main vehicle high-voltage system and the refrigerator compartment power module; a connection switch system is provided for connecting the high-voltage connection system and the main vehicle high-voltage system and / or connecting the high-voltage connection system and the refrigerator compartment power module, for controlling the connection status between the main vehicle high-voltage system and the refrigerator compartment power module, so as to supply power to the refrigerator compartment power module through the first power battery power supply section and / or the drive generator section when the refrigerator compartment high-voltage system fails.
[0007] According to an embodiment of the present invention, the high-voltage power supply system for a hybrid refrigerated truck includes a high-voltage connection system that connects the main vehicle's high-voltage system and the refrigerated compartment's power module. This allows both the first power battery power supply section and the drive generator section in the main vehicle's high-voltage system to supply power to the refrigerated compartment's power module, and the second power battery power supply section in the refrigerated compartment's high-voltage system to also supply power to the refrigerated compartment's power module. A connection switch system controls the connection state between the main vehicle's high-voltage system and the refrigerated compartment's power module. In the event of a fault in the refrigerated compartment's high-voltage system, the connection switch system is closed, supplying power to the refrigerated compartment's power module via either the first power battery power supply section or the drive generator section. Alternatively, in the event of a fault in the main vehicle's high-voltage system, the connection switch system is opened, supplying power to the refrigerated compartment's power module via the second power battery power supply section. This achieves unified energy management of both the main vehicle's high-voltage system and the refrigerated compartment's high-voltage system, optimizing overall vehicle energy consumption.
[0008] In some embodiments, the high-voltage connection system includes: a first connector connected to the refrigerator's power module; and a second connector connected to the first connector, the second connector also optionally connected to the first power battery power supply section and the drive power generation section.
[0009] In some embodiments, the connection switch system includes: a first positive relay, a first end of which is connected to a second connector, and a second end of which is connected to the positive terminal of the first power battery power supply section and the drive generator section; a first negative relay, a first end of which is connected to the second connector, and a second end of which is connected to the negative terminal of the first power battery power supply section; a first pre-charging circuit, a first end of which is connected to the first end of the first positive relay, and a second end of which is connected to the second end of the first positive relay; wherein the first positive relay, the first negative relay, and the first pre-charging circuit are closed or opened according to the vehicle's high-voltage power-on / off sequence; a second positive relay, a first end of which is connected to the first connector, and a second end of which is connected to the first end of the refrigerator compartment power module; and a second negative relay, a first end of which is connected to the first connector, and a second end of which is connected to the second end of the refrigerator compartment power module.
[0010] In some embodiments, the high-voltage power supply system of the hybrid refrigerated truck further includes: a first high-voltage interlock circuit located at the first connector, used to detect the connection status between the first power battery power supply section and / or the drive power generation section and the first connector; and a second high-voltage interlock circuit located at the second connector, used to detect the connection status between the refrigerated box power module and the second connector.
[0011] In some embodiments, the drive generation section includes an engine, a generator, and a motor controller. The motor controller is connected to the generator and the second terminal of the first positive relay, and the generator is connected to the engine. The first power battery power supply section includes a first power battery, a third positive relay, a third negative relay, and a second pre-charging circuit. The first terminal of the third positive relay is connected to the positive terminal of the first power battery, and the second terminal of the third positive relay is connected to the motor controller and the second terminal of the first positive relay. The first terminal of the third negative relay is connected to the negative terminal of the first power battery, and the second terminal of the third negative relay is connected to the second terminal of the first negative relay. The second pre-charging circuit is connected to both ends of the third positive relay. The third positive relay, the third negative relay, and the second pre-charging circuit are closed or opened according to the timing of the vehicle's high-voltage power-on and power-off cycles.
[0012] In some embodiments, the second power battery power supply section includes a second power battery, a fourth positive relay, a fourth negative relay, and a third pre-charging circuit. The first terminal of the fourth positive relay is connected to the positive terminal of the second power battery, the second terminal of the fourth positive relay is connected to the first terminal of the refrigerator compartment power module, the first terminal of the fourth negative relay is connected to the negative terminal of the second power battery, the second terminal of the fourth negative relay is connected to the second terminal of the refrigerator compartment power module, and the third pre-charging circuit is connected to both ends of the fourth positive relay. The fourth positive relay, the fourth negative relay, and the third pre-charging circuit are used to close or open according to the vehicle's high-voltage power-on / off sequence.
[0013] In some embodiments, the high-voltage power supply system of the hybrid refrigerated vehicle further includes: a fifth positive relay, the first end of which is connected to the positive terminal of the power supply section of the second power battery, and the second end of which is adapted to be connected to the positive terminal of a charging power supply; and a fifth negative relay, the first end of which is connected to the negative terminal of the power supply section of the second power battery, and the second end of which is adapted to be connected to the negative terminal of a charging power supply; the fifth positive relay and the fifth negative relay are used to connect to the charging power supply to charge the power supply section of the second power battery.
[0014] A second aspect of the present invention provides a hybrid refrigerated truck, comprising: a main vehicle and a refrigerated compartment, the refrigerated compartment being located on the main vehicle; a high-voltage power supply system for a hybrid refrigerated truck as described in the above embodiment; a vehicle controller, a refrigerated compartment controller, a local start switch, and a refrigerated compartment power-taking trigger switch, the refrigerated compartment controller and the local start switch being located on the refrigerated compartment, and the vehicle controller and the refrigerated compartment power-taking trigger switch being located on the main vehicle; the refrigerated compartment controller is connected to the local start switch and is used to control the switch in the high-voltage power supply system of the hybrid refrigerated truck to supply power to the refrigerated compartment power module by a second power battery when the main vehicle high-voltage system fails and the local start switch is activated; the vehicle controller is connected to the refrigerated compartment controller and the refrigerated compartment power-taking trigger switch and is used to control the switch in the high-voltage power supply system of the hybrid refrigerated truck to supply power to the refrigerated compartment power module by the main vehicle high-voltage system when the switch signal of the refrigerated compartment power-taking trigger switch is valid.
[0015] According to an embodiment of the hybrid refrigerated truck of the present invention, the vehicle controller is connected to the refrigerated compartment power trigger switch and the refrigerated compartment controller, and the refrigerated compartment controller is connected to the local start switch. When the main vehicle high-voltage system is normal and the switch signal of the refrigerated compartment power trigger switch is valid, the vehicle controller controls the main vehicle high-voltage system to supply power to the refrigerated compartment power module. When the main vehicle high-voltage system fails and the local start switch is activated, the refrigerated compartment controller controls the refrigerated compartment high-voltage system to supply power to the refrigerated compartment power module, thereby realizing unified energy management of the main vehicle high-voltage system and the refrigerated compartment high-voltage system and optimizing the vehicle's energy consumption.
[0016] A third aspect of the present invention provides a control method for a high-voltage power supply system of a hybrid refrigerated truck, used in the high-voltage power supply system of the hybrid refrigerated truck described in the above embodiments or in the hybrid refrigerated truck described in the above embodiments. The control method includes: detecting the connection status between the main vehicle high-voltage system and the refrigerated compartment power module, and detecting the connection status between the refrigerated compartment high-voltage system and the refrigerated compartment power module; when the main vehicle high-voltage system and the refrigerated compartment power module are normally connected, the refrigerated compartment power module is powered by a first power battery power supply section and / or a drive generator section of the main vehicle high-voltage system; when the connection between the main vehicle high-voltage system and the refrigerated compartment power module is abnormal and the connection between the refrigerated compartment high-voltage system and the refrigerated compartment power module is normal, the refrigerated compartment high-voltage system powers the refrigerated compartment power module; when the connection between the main vehicle high-voltage system and the refrigerated compartment power module is normal and one of the first power battery power supply section and the drive generator section in the main vehicle high-voltage system is abnormal, the normally functioning part of the first power battery power supply section and the drive generator section powers the refrigerated compartment power module.
[0017] According to the control method of the high-voltage power supply system of the hybrid refrigerated truck of the present invention, the connection status between the main vehicle high-voltage system and the refrigerated compartment power module is detected in real time, and the connection status between the refrigerated compartment high-voltage system and the refrigerated compartment power module is also detected. When the main vehicle high-voltage system and the refrigerated compartment power module are normally connected, the refrigerated compartment power module is powered through the first power battery power supply section or the drive generator section. Alternatively, when the connection between the main vehicle high-voltage system and the refrigerated compartment power module is abnormal but the connection between the refrigerated compartment high-voltage system and the refrigerated compartment power module is normal, the refrigerated compartment high-voltage system is powered through the refrigerated compartment power module. This achieves unified energy management of the main vehicle high-voltage system and the refrigerated compartment high-voltage system, and optimizes the overall vehicle energy consumption.
[0018] In some embodiments, the control method further includes at least one of the following: when the main vehicle high-voltage system or the refrigerator compartment high-voltage system supplies power to the refrigerator compartment electrical components, controlling the closing or opening of the corresponding switch in the high-voltage system of the hybrid refrigerated vehicle according to the vehicle high-voltage power-on / off sequence; when the drive generator supplies power to the refrigerator compartment electrical modules, adjusting the drive or braking power of the motor controller based on the power demand of the refrigerator compartment electrical modules; and providing a prompt when the connection status between the main vehicle high-voltage system and the refrigerator compartment electrical modules is abnormal, or when the connection status between the refrigerator compartment high-voltage system and the refrigerator compartment electrical modules is abnormal, or when the main vehicle high-voltage system is abnormal, or when the refrigerator compartment high-voltage system is abnormal.
[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a high-voltage power supply system for a hybrid refrigerated truck according to an embodiment of the present invention; Figure 2 This is a structural block diagram of a hybrid refrigerated truck according to an embodiment of the present invention; Figure 3 This is a structural block diagram of a hybrid refrigerated truck according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a hybrid refrigerated truck according to an embodiment of the present invention; Figure 5 This is a flowchart of a control method for a high-voltage power supply system of a hybrid refrigerated truck according to an embodiment of the present invention; Figure 6 This is a flowchart illustrating the power supply of the main vehicle high-voltage system to the refrigerated box electrical module according to an embodiment of the present invention; Figure 7This is a flowchart illustrating the power supply process of a high-pressure system for a refrigerator to a power module according to an embodiment of the present invention.
[0021] Figure label: Hybrid refrigerated truck 2000; Main vehicle 2100; refrigerated box 2200; high-voltage power supply system for hybrid refrigerated truck 1000; Vehicle controller 2110; Refrigerator compartment power trigger switch 2120; Refrigerator compartment controller 2210; Local start switch 2220; Main vehicle high voltage system 100; First power battery power supply section 120; Drive generator section 110; Refrigerator compartment high voltage system 200; Second power battery power supply section 210; Refrigerator compartment power module 220; High voltage connection system 300; Connection switch system 400; First connector 310; Second connector 320; First positive relay K4; First negative relay K 6; First pre-charging circuit 01; Second positive relay K7; Second negative relay K8; First high-voltage interlock circuit 311; Second high-voltage interlock circuit 312; Engine 111; Generator 112; Motor controller 113; First power battery 121; Third positive relay K1; Third negative relay K3; Second pre-charging circuit 02; Second power battery 211; Fourth positive relay K9; Fourth negative relay K11; Third pre-charging circuit 03; Fifth positive relay K12; Fifth negative relay K13. Detailed Implementation
[0022] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.
[0023] Existing traditional refrigerated trucks are specialized vehicles primarily developed for long-distance transportation and to prevent goods from spoiling during extended transport. Traditional refrigerated trucks use gasoline or diesel engines to drive the main vehicle, and the refrigerated container also uses a separate gasoline or diesel engine to power the refrigeration unit. There is no energy transfer or information exchange between the main vehicle and the refrigerated container, making unified energy management impossible and hindering further optimization of overall vehicle energy consumption. Furthermore, the need for two engines in traditional refrigerated trucks results in higher overall vehicle costs.
[0024] To address the above problems, the first aspect of this invention provides a high-voltage power supply system for a hybrid refrigerated truck. This system can control the connection status between the main vehicle's high-voltage system and the refrigerated box's power module through a connection switch system, thereby enabling unified energy management of the main vehicle's high-voltage system and the refrigerated box's high-voltage system and optimizing the overall vehicle energy consumption.
[0025] The following is based on Figure 1 Describe the high-voltage power supply system of the hybrid refrigerated truck, such as... Figure 1As shown, the high-voltage power supply system 1000 of the hybrid refrigerated truck includes: a main vehicle high-voltage system 100, a refrigerated box high-voltage system 200, a high-voltage connection system 300, and a connection switch system 400.
[0026] The main vehicle high-voltage system 100 is located in the main vehicle of the hybrid refrigerated truck. The main vehicle high-voltage system 100 includes a first power battery power supply section 120 and a drive power generation section 110, which are selectively connected. The refrigerated compartment high-voltage system 200 is located in the refrigerated compartment of the hybrid refrigerated truck. The refrigerated compartment high-voltage system 200 includes a second power battery power supply section 210, which is connected to the refrigerated compartment power module 220 of the refrigerated compartment and is used to supply power to the refrigerated compartment power module 220.
[0027] The high-voltage connection system 300 is used to connect the main vehicle high-voltage system 100 and the refrigerator compartment power module 220; the connection switch system 400 is connected between the high-voltage connection system 300 and the main vehicle high-voltage system 100 and / or between the high-voltage connection system 300 and the refrigerator compartment power module 220, and is used to control the connection status between the main vehicle high-voltage system 100 and the refrigerator compartment power module 220, so that when the refrigerator compartment high-voltage system 200 fails, the first power battery power supply section 120 and / or the driving generator section 110 can supply power to the refrigerator compartment power module 220.
[0028] Specifically, the high-voltage power supply system 1000 of the hybrid refrigerated truck includes a main vehicle high-voltage system 100 and a refrigerated compartment high-voltage system 200. The main vehicle high-voltage system 100 is located in the main vehicle of the hybrid refrigerated truck and is used to supply power to all electrical components in the hybrid refrigerated truck. It can optionally supply power to the refrigerated compartment electrical module 220, which includes a refrigeration unit, electric heating, and other high-voltage loads. The first power battery power supply section 120 and the drive generator section 110 in the main vehicle high-voltage system 100 can be selectively connected. When the first power battery in the first power battery power supply section 120 needs to be charged, the first power battery power supply section 120 and the drive generator section 110 are connected, and the drive generator section 110 charges the first power battery in the first power battery power supply section 120. When the first power battery power supply section 120 fails, the first power battery power supply section 120 and the drive generator section 110 are disconnected, and the drive generator section 110 directly supplies power to the electrical components.
[0029] The high-voltage system 200 for the refrigerated compartment includes a second power battery power supply section 210, which is used only to supply power to the refrigerated compartment power module 220. When the main vehicle high-voltage system 100 fails, the refrigerated compartment power module 220 can be powered by the second power battery power supply section 210 in the high-voltage system 200. The main vehicle and the refrigerated compartment of the hybrid refrigerated vehicle can be used separately. When the refrigerated compartment is separated from the main vehicle, the refrigerated compartment power module 220 can only be powered by the second power battery power supply section 210 in the high-voltage system 200.
[0030] The high-voltage connection system 300 can be a high-voltage conductor. The main vehicle high-voltage system 100 and the refrigerator box power module 220 are electrically connected through the high-voltage connection system 300, so that the main vehicle high-voltage system 100 can supply power to the refrigerator box power module 220. The connection switch system 400 is located between the high-voltage connection system 300 and the main vehicle high-voltage system 100. The connection switch system 400 is also located between the high-voltage connection system 300 and the refrigerator compartment power module 220. The on / off state of the relay in the connection switch system 400 can control the connection status between the main vehicle high-voltage system 100 and the refrigerator compartment power module 220. When the refrigerator compartment high-voltage system 200 fails, the relay in the connection switch system 400 closes, and the refrigerator compartment power module 220 can be powered by the first power battery power supply section 120 or the drive generator section 110 in the main vehicle high-voltage system 100. When the main vehicle high-voltage system 100 fails, the relay in the connection switch system 400 opens, and the second power battery power supply section 210 in the refrigerator compartment high-voltage system 200 powers the refrigerator compartment power module 220.
[0031] According to an embodiment of the present invention, the high-voltage power supply system for a hybrid refrigerated truck includes a high-voltage connection system that connects the main vehicle's high-voltage system and the refrigerated compartment's power module. This allows both the first power battery power supply section and the drive generator section in the main vehicle's high-voltage system to supply power to the refrigerated compartment's power module, and the second power battery power supply section in the refrigerated compartment's high-voltage system to also supply power to the refrigerated compartment's power module. A connection switch system controls the connection state between the main vehicle's high-voltage system and the refrigerated compartment's power module. In the event of a fault in the refrigerated compartment's high-voltage system, the connection switch system is closed, supplying power to the refrigerated compartment's power module via either the first power battery power supply section or the drive generator section. Alternatively, in the event of a fault in the main vehicle's high-voltage system, the connection switch system is opened, supplying power to the refrigerated compartment's power module via the second power battery power supply section. This achieves unified energy management of both the main vehicle's high-voltage system and the refrigerated compartment's high-voltage system, optimizing overall vehicle energy consumption.
[0032] In some embodiments, such as Figure 1 As shown, the high-voltage connection system 300 includes: a first connector 310 and a second connector 320.
[0033] The first connector 310 is connected to the refrigerator power module 220; the second connector 320 is connected to the first connector 310, and the second connector 320 is also optionally connected to the first power battery power supply section 120 and the drive power generation section 110.
[0034] Specifically, the high-voltage connection system 300 is provided with a first connector 310 and a second connector 320. The first connector 310 is used to connect the refrigerator power module 220, and the second connector 320 is used to connect the first power battery power supply part 120 and the drive power generation part 110. The first connector 310 and the second connector 320 are connected by a high-voltage wire, so that the first power battery power supply part 120 and the drive power generation part 110 can supply power to the refrigerator power module 220 through the high-voltage wire.
[0035] In some embodiments, such as Figure 1 As shown, the connection switch system 400 includes: a first positive relay K4, a first negative relay K6, a first pre-charging circuit 01, a second positive relay K7, and a second negative relay K8.
[0036] Specifically, the first terminal of the first positive relay K4 is connected to the second connector 320, and the second terminal of the first positive relay K4 is connected to the positive terminal of the first power battery power supply section 120 and the drive generator section 110; the first terminal of the first negative relay K6 is connected to the second connector 320, and the second terminal of the first negative relay K6 is connected to the negative terminal of the first power battery power supply section 120. The first positive relay K4 and the first negative relay K6 are used to control the connection status between the first power battery power supply section 120 and the drive generator section 110 and the refrigerator power module 220. If it is necessary to supply power to the refrigerator power module 220 through the first power battery power supply section 120 and the drive generator section 110, the first positive relay K4 and the first negative relay K6 are closed; if it is not necessary for the first power battery power supply section 120 and the drive generator section 110 to supply power to the refrigerator power module 220, the first positive relay K4 and the first negative relay K6 are open.
[0037] The first end of the first pre-charging circuit 01 is connected to the first end of the first positive relay K4, and the second end of the first pre-charging circuit 01 is connected to the second end of the first positive relay K4. The first pre-charging circuit 01 includes a first pre-charging resistor R1 and a relay K5. At the moment the first positive relay K4 and the first negative relay K6 are closed, the circuit containing the refrigerator power module 220 is equivalent to a short circuit, and a large current may damage the device. Therefore, before the first positive relay K4 and the first negative relay K6 are closed, the relay K5 is closed first, and the refrigerator power module 220 is pre-charged through the first pre-charging resistor R1. After the pre-charging is completed, the relay K5 is opened, and the first positive relay K4 and the first negative relay K6 are closed.
[0038] Furthermore, the first end of the second positive relay K7 is connected to the first connector 310, and the second end of the second positive relay K7 is connected to the first end of the refrigerator power module 220; the first end of the second negative relay K8 is connected to the first connector 310, and the second end of the second negative relay K8 is connected to the second end of the refrigerator power module 220.
[0039] The second positive relay K7 and the second negative relay K8 are used to control the connection status between the first power battery power supply section 120 and the drive generator section 110 and the refrigerator power module 220. If it is necessary to supply power to the refrigerator power module 220 through the first power battery power supply section 120 and the drive generator section 110, the first positive relay K4 and the first negative relay K6 are closed, and the second positive relay K7 and the second negative relay K8 are also closed accordingly. If it is not necessary for the first power battery power supply section 120 and the drive generator section 110 to supply power to the refrigerator power module 220, the first positive relay K4 and the first negative relay K6 are opened, and the second positive relay K7 and the second negative relay K8 are also opened accordingly.
[0040] For example, to ensure high-voltage safety, the positive and negative terminals of the main vehicle high-voltage system 100 and the high-voltage connection system 300 are respectively equipped with two isolation relays: a first positive relay K4 and a first negative relay K6. The positive and negative terminals of the refrigerator compartment power module 220 and the high-voltage connection system 300 are respectively equipped with a second positive relay K7 and a second negative relay K8. These relays can be disconnected when power is not needed or in case of a fault, ensuring that the high-voltage connection system 300 is not energized and avoiding the risk of electric shock to personnel. During the process of the main vehicle high-voltage system 100 supplying high voltage to the refrigerator compartment power module 220, in order to ensure that the first positive relay K4 and the first negative relay K6, as well as the components in the circuit, are not burned out by the instantaneous large current, a first pre-charging circuit 01 is added. First, relay K5 is closed, and the refrigerator compartment power module 220 is pre-charged through the first pre-charging resistor R1.
[0041] In some embodiments, such as Figure 1 As shown, the high-voltage power supply system 1000 for hybrid refrigerated trucks also includes: a first high-voltage interlock circuit 311 and a second high-voltage interlock circuit 312.
[0042] The first high-voltage interlock circuit 311 is located at the first connector 310 and is used to detect the connection status between the first power battery power supply section 120 and / or the drive power generation section 110 and the first connector 310; the second high-voltage interlock circuit 312 is located at the second connector 320 and is used to detect the connection status between the refrigerator power module 220 and the second connector 320.
[0043] Specifically, the first high-voltage interlock circuit 311 monitors the connection status of the first power battery power supply section 120 and / or the drive generator section 110 with the first connector 310 in real time through the low-voltage monitoring circuit. Once an abnormality is detected (loose, disconnected, not closed), the high-voltage power supply is immediately forcibly cut off to prevent electric shock, high-voltage arcing, or equipment damage. The first high-voltage interlock circuit 311 is equipped with an interlock switch, which is disconnected when a circuit abnormality is detected.
[0044] The second high-voltage interlock circuit 312 monitors the connection status of the refrigerator power module 220 and the second connector 320 in real time through the low-voltage monitoring circuit. Once an abnormality is detected (loose, disconnected, not closed), the high-voltage power supply is immediately forcibly cut off to prevent electric shock, high-voltage arcing, or equipment damage. The second high-voltage interlock circuit 312 is equipped with an interlock switch, which disconnects when a circuit abnormality is detected.
[0045] For example, when the high-voltage wiring harness between the main vehicle and the refrigerated box is not connected or has a loose connection at the main vehicle end, and the power trigger switch of the refrigerated box is active, power should not be supplied to the refrigerated box at this time in order to ensure high-voltage safety. In order to detect that the high-voltage wiring harness is not connected or has a loose connection, a first high-voltage interlock circuit 311 is added, which is detected by the vehicle controller, and a second high-voltage interlock circuit 312 is added, which is detected by the refrigerated box controller.
[0046] In some embodiments, such as Figure 1 As shown, the drive and power generation section 110 includes: an engine 111, a generator 112, and a motor controller 113.
[0047] The motor controller 113 is connected to the generator 112 and the second terminal of the first positive relay K4, and the generator is connected to the engine 111 of 112.
[0048] Specifically, when the hybrid refrigerated truck is driven by the engine 111, the engine 111 and the transmission work together to drive the vehicle; the energy generated by the engine 111 can be used to generate electricity through the generator 112 to charge the first power battery, and the motor controller 113 can control the power generation of the generator 112 to charge the first power battery or to supply power to the refrigerated box power module 220.
[0049] Furthermore, such as Figure 1 As shown, the first power battery power supply section 120 includes: a first power battery 121, a third positive relay K1, a third negative relay K3, and a second pre-charging circuit 02.
[0050] The first terminal of the third positive relay K1 is connected to the positive terminal of the first power battery 121, the second terminal of the third positive relay K1 is connected to the motor controller 113 and the second terminal of the first positive relay K4, the first terminal of the third negative relay K3 is connected to the negative terminal of the first power battery 121, the second terminal of the third negative relay K3 is connected to the second terminal of the first negative relay K6, and the second pre-charging circuit 02 is connected to both ends of the third positive relay K1.
[0051] Specifically, when the first power battery power supply section 120 supplies power to the refrigerator box power module 220, the first power battery 121 supplies power to the refrigerator box power module 220. Before the first power battery 121 supplies power to the refrigerator box power module 220, the relay K2 in the second pre-charging circuit 02 is closed, and pre-charging is performed through the second pre-charging resistor R2. After the pre-charging is completed, the third positive relay K1 and the third negative relay K3 are closed, and the first power battery 121 can supply power to the refrigerator box power module 220 and other high-voltage loads.
[0052] In some embodiments, such as Figure 1 As shown, the second power battery power supply section 210 includes: a second power battery 211, a fourth positive relay K9, a fourth negative relay K11, and a third pre-charging circuit 03.
[0053] Among them, the first end of the fourth positive relay K9 is connected to the positive terminal of the second power battery 211, the second end of the fourth positive relay K9 is connected to the first end of the refrigerator power module 220, the first end of the fourth negative relay K11 is connected to the negative terminal of the second power battery 211, the second end of the fourth negative relay K11 is connected to the second end of the refrigerator power module 220, and the third pre-charging circuit 03 is connected to both ends of the fourth positive relay K9.
[0054] Specifically, when the first power battery power supply section 120 cannot supply power to the refrigerator power module 220, the second power battery 211 can supply power to the refrigerator power module 220. Before the second power battery 211 supplies power to the refrigerator power module 220, the relay K10 in the third pre-charging circuit 03 is closed, and pre-charging is performed through the third pre-charging resistor R3. After the pre-charging is completed, the fourth positive relay K9 and the fourth negative relay K11 are closed, and the second power battery 211 can supply power to the refrigerator power module 220.
[0055] In some embodiments, such as Figure 1 As shown, the high-voltage power supply system 1000 of the hybrid refrigerated truck also includes: a fifth positive relay K12 and a fifth negative relay K13.
[0056] Specifically, the first terminal of the fifth positive relay K12 is connected to the positive terminal of the second power battery power supply section 210, and the second terminal of the fifth positive relay K12 is adapted to be connected to the positive terminal of the charging power supply; the first terminal of the fifth negative relay K13 is connected to the negative terminal of the second power battery power supply section 210, and the second terminal of the fifth negative relay K13 is adapted to be connected to the negative terminal of the charging power supply; the fifth positive relay K12 and the fifth negative relay K13 are used to connect to the charging power supply to charge the second power battery power supply section 210.
[0057] Specifically, the first power battery power supply section 120 can be charged by the generator 112, while the second power battery power supply section 210 can only be charged by the charging power supply when the power is low. After the second power battery power supply section 210 is connected to the charging power supply, the fifth positive relay K12 and the fifth negative relay K13 are closed to charge the second power battery power supply section 210.
[0058] A second aspect of the present invention provides a hybrid refrigerated truck, such as... Figure 2 As shown, the hybrid refrigerated truck 2000 includes: a main vehicle 2100, a refrigerated box 2200, and a hybrid refrigerated truck high-voltage power supply system 1000; wherein, the refrigerated box 2200 is located on the main vehicle 2100.
[0059] like Figure 3 As shown, the hybrid refrigerated truck 2000 also includes: a vehicle controller 2110, a refrigerated compartment power trigger switch 2120, a refrigerated compartment controller 2210, and a local start switch 2220.
[0060] Specifically, the refrigerator compartment controller 2210 and the local start switch 2220 are located in the refrigerator compartment, while the vehicle controller 2110 and the refrigerator compartment power trigger switch 2120 are located in the main vehicle. The refrigerator compartment power trigger switch 2120 includes a power switch and / or a soft switch. The soft switch can be a switch set in the central control unit. Only one power switch can be set, or both a power switch and a soft switch can be set. The refrigerator compartment controller 2210 is connected to the local start switch 2220 and is used to initiate local start in case of a fault in the main vehicle's high-voltage system 100. When switch 2220 is activated, it controls the switch in the high-voltage power supply system 1000 of the hybrid refrigerated truck to supply power to the refrigerator compartment power module 220 by the second power battery power supply section 210; the vehicle controller 2110 is connected to the refrigerator compartment controller 2210 and the refrigerator compartment power take-off trigger switch 2120, and is used to control the switch in the high-voltage power supply system 1000 of the hybrid refrigerated truck to supply power to the refrigerator compartment power module 220 by the main vehicle high-voltage system 100 when the switch signal of the refrigerator compartment power take-off trigger switch 2120 is valid.
[0061] According to an embodiment of the hybrid refrigerated truck of the present invention, the vehicle controller is connected to the refrigerated compartment power trigger switch and the refrigerated compartment controller, and the refrigerated compartment controller is connected to the local start switch. When the main vehicle high-voltage system is normal and the switch signal of the refrigerated compartment power trigger switch is valid, the vehicle controller controls the main vehicle high-voltage system to supply power to the refrigerated compartment power module. When the main vehicle high-voltage system fails and the local start switch is activated, the refrigerated compartment controller controls the refrigerated compartment high-voltage system to supply power to the refrigerated compartment power module, thereby realizing unified energy management of the main vehicle high-voltage system and the refrigerated compartment high-voltage system and optimizing the vehicle's energy consumption.
[0062] For example, in a hybrid refrigerated truck, the main vehicle uses either a gasoline or diesel engine and an electric motor for propulsion, while the refrigerated compartment is powered by electricity. The driver can choose whether the refrigerated compartment's power comes from the main vehicle's high-voltage electricity or from the compartment's local high-voltage battery. This allows for unified energy management of both the main vehicle and the refrigerated compartment through a vehicle controller, further optimizing overall energy consumption and reducing transportation costs and carbon emissions. Furthermore, the refrigerated compartment in a hybrid refrigerated truck does not require an engine, significantly reducing its cost. Overall, hybrid refrigerated trucks have a significant competitive advantage over traditional refrigerated trucks.
[0063] like Figure 4 As shown, in this hybrid refrigerated truck, the driver can select whether the refrigeration unit is powered by the main vehicle's battery or engine via a power trigger switch on the main vehicle's center console or a virtual switch on the center console screen. When the power trigger switch is ineffective, if the driver presses the local start switch inside the refrigerated compartment, the refrigerated compartment controller will activate the local battery power supply to the refrigeration unit. Using this hybrid refrigerated truck results in higher control reliability, significant energy savings, reduced overall vehicle cost, and enhanced market competitiveness.
[0064] A third aspect of the present invention provides a control method for a high-voltage power supply system of a hybrid refrigerated truck, used in a high-voltage power supply system of a hybrid refrigerated truck or a hybrid refrigerated truck, such as... Figure 5 As shown, the method includes at least steps S1 to S5.
[0065] Step S1: Detect the connection status between the main vehicle high-voltage system and the refrigerator compartment power module, and also detect the connection status between the refrigerator compartment high-voltage system and the refrigerator compartment power module.
[0066] Specifically, before supplying power to the refrigerator compartment's electrical module, it is necessary to check the connection status between the main vehicle's high-voltage system, the refrigerator compartment's high-voltage system, and the refrigerator compartment's electrical module to determine whether the main vehicle's high-voltage system and the refrigerator compartment's high-voltage system can supply power to the refrigerator compartment's electrical module.
[0067] Step S2: When the main vehicle high-voltage system and the refrigerator box power module are normally connected, the first power battery power supply part and / or drive generator part of the main vehicle high-voltage system supply power to the refrigerator box power module.
[0068] Specifically, when the main vehicle high-voltage system and the refrigerator box power module are normally connected, the refrigerator box power module can be powered through the main vehicle high-voltage system. The main vehicle high-voltage system includes a first power battery power supply section and a drive generator section. Both the first power battery power supply section and the drive generator section can power the refrigerator box power module. When the first power battery power supply section is normal, the refrigerator box power module can be powered through the first power battery power supply section. When the first power battery power supply section fails, the refrigerator box power module is powered through the drive generator section.
[0069] Step S3: When the connection between the main vehicle high-voltage system and the refrigerator compartment power module is abnormal and the connection between the refrigerator compartment high-voltage system and the refrigerator compartment power module is normal, the refrigerator compartment high-voltage system supplies power to the refrigerator compartment power module.
[0070] Specifically, if an abnormal connection is detected between the main vehicle's high-voltage system and the refrigerator compartment's power module, the connection between the refrigerator compartment's high-voltage system and the refrigerator compartment's power module will be checked. If the connection between the refrigerator compartment's high-voltage system and the refrigerator compartment's power module is confirmed to be normal, power will be supplied to the refrigerator compartment's power module through the refrigerator compartment's high-voltage system.
[0071] Step S4: When the connection between the main vehicle high-voltage system and the refrigerator box power module is normal and one of the first power battery power supply section and the drive power generation section in the main vehicle high-voltage system is abnormal, the normally functioning part of the first power battery power supply section and the drive power generation section supplies power to the refrigerator box power module.
[0072] Specifically, since the power in the main vehicle's high-voltage system can be generated by the vehicle itself, while the power in the refrigerator's high-voltage system can only be charged externally, the main vehicle's high-voltage system is prioritized to power the refrigerator's electrical module. When the connection between the main vehicle's high-voltage system and the refrigerator's electrical module is normal, it is determined whether the first power battery power supply section and the drive power generation section are abnormal. If both the first power battery power supply section and the drive power generation section are normal, they can power the refrigerator's electrical module simultaneously. If the first power battery power supply section is abnormal, the drive power generation section can power the refrigerator's electrical module. If the drive power generation section is abnormal, the first power battery power supply section can power the refrigerator's electrical module.
[0073] According to the control method of the high-voltage power supply system of the hybrid refrigerated truck of the present invention, the connection status between the main vehicle high-voltage system and the refrigerated compartment power module is detected in real time, and the connection status between the refrigerated compartment high-voltage system and the refrigerated compartment power module is also detected. When the main vehicle high-voltage system and the refrigerated compartment power module are normally connected, the refrigerated compartment power module is powered through the first power battery power supply section or the drive generator section. Alternatively, when the connection between the main vehicle high-voltage system and the refrigerated compartment power module is abnormal but the connection between the refrigerated compartment high-voltage system and the refrigerated compartment power module is normal, the refrigerated compartment high-voltage system is powered through the refrigerated compartment power module. This achieves unified energy management of the main vehicle high-voltage system and the refrigerated compartment high-voltage system, and optimizes the overall vehicle energy consumption.
[0074] In some embodiments, the control method further includes at least one of the following: when the main vehicle high-voltage system or the refrigerator high-voltage system is started to supply power to the refrigerator compartment electrical components, controlling the closing or opening of the corresponding switch in the high-voltage system of the hybrid refrigerated vehicle according to the vehicle's high-voltage power-on / off sequence; when the drive generator supplies power to the refrigerator compartment electrical modules, adjusting the drive or braking power of the motor controller based on the power demand of the refrigerator compartment electrical modules; and providing a prompt when the connection status between the main vehicle high-voltage system and the refrigerator compartment electrical modules is abnormal, or when the connection status between the refrigerator compartment high-voltage system and the refrigerator compartment electrical modules is abnormal, or when the main vehicle high-voltage system is abnormal, or when the refrigerator compartment high-voltage system is abnormal.
[0075] The steps for the main vehicle's high-voltage system to supply power to the refrigerated box's electrical module are as follows: Figure 6 As shown; Step S01: Power on the vehicle controller at low voltage.
[0076] Step S02: Power on the main vehicle's high voltage.
[0077] Step S03: Check if the power trigger switch for the refrigerator is effective. If so, proceed to step S04.
[0078] Step S04: Is the high-voltage connection system not connected? If yes, proceed to step S05; otherwise, proceed to step S06.
[0079] Step S05, the instrument indicates that the high-voltage connection system is not connected.
[0080] Step S06: Check if the first power battery power supply section is successfully powered on. If yes, proceed to step S07; otherwise, proceed to step S14.
[0081] Step S07: Send a command to the refrigerator controller: The first power battery outputs a high voltage command to the refrigerator power module.
[0082] Step S08: Does the refrigerator controller receive an instruction? If yes, proceed to step S10; otherwise, proceed to step S09.
[0083] Step S09: Terminate the current power supply operation and report the fault.
[0084] Step S10: High voltage is applied to the power module of the refrigerator. According to the high voltage power-on process, the on / off state of relays K6, K5 and K4 is controlled.
[0085] Step S11: Adjust the drive / braking power of the vehicle controller in real time according to the power demand of the refrigerated box controller.
[0086] Step S12: Check if the power trigger switch for the refrigerator is effective. If yes, proceed to step S11; otherwise, proceed to step S13.
[0087] Step S13: End power supply to the refrigerator.
[0088] Step S14: Determine the engine operating status.
[0089] The power supply requirements of the vehicle controller for the refrigerated compartment power module mainly include two functions, which are listed in order of priority from high to low: the power supply function based on the main vehicle high voltage system as the supporting voltage and the power supply function based on the refrigerated compartment high voltage system as the supporting voltage.
[0090] When the main vehicle's high-voltage system serves as the power supply for the supporting voltage, it is determined whether the refrigerator compartment power supply trigger switch is valid. If the refrigerator compartment power supply trigger switch is valid, and the high-voltage connector at the vehicle end of the high-voltage wiring harness between the main vehicle and the refrigerator compartment is not connected, i.e., the first high-voltage interlock circuit is faulty, then the main vehicle is prohibited from supplying power to the refrigerator compartment, and the instrument panel is reported that the high-voltage connector at the main vehicle end for supplying power to the refrigerator compartment is not plugged in. When the refrigerator compartment power supply trigger switch is valid, and there is no fault in the first high-voltage interlock circuit, then the following actions are performed.
[0091] After the main vehicle's high-voltage system is connected (i.e., the third positive relay K1 and the third negative relay K3 are connected), it sends a request to output high voltage to the refrigerator compartment and uses the first power battery as the supporting voltage. When it receives a permission from the refrigerator compartment controller to allow the main vehicle's high-voltage system to output, it controls the first negative relay K6, the first positive relay K4, and relay K5 to close or open according to the high-voltage connection sequence. After the main vehicle successfully connects to high voltage, it sends a refrigerator compartment cooling enable command and adjusts the drive / braking power of the motor controller in real time according to the power demand from the refrigerator compartment controller. If the refrigerator compartment power supply trigger switch becomes invalid during the process of the main vehicle outputting high voltage to the refrigerator compartment, it sends a command to normally end the power supply to the refrigerator compartment, execute the high-voltage deactivation action, and deactivate the refrigerator compartment cooling. According to the high-voltage deactivation sequence, it controls the third positive relay K1 and the third negative relay K3 to disconnect in sequence and controls the motor controller to discharge to eliminate residual charge on the high-voltage DC bus. Then it controls the first positive relay K4 and the first negative relay K6 to disconnect, and finally sends a command to disconnect the second positive relay K7 and the second negative relay K8.
[0092] The steps for supplying power to the refrigerator compartment's electrical module when the first power battery fails are as follows: Figure 7 As shown; Step S15: The first power battery power supply section failed to power on.
[0093] Step S16: Has the engine started successfully? If yes, proceed to step S17; otherwise, proceed to step S03.
[0094] Step S17: Is the vehicle controller functioning normally? If yes, proceed to step S18; otherwise, proceed to step S03.
[0095] Step S18: Send a command to the refrigerator controller: The second power battery outputs a high voltage to the refrigerator power module.
[0096] Step S19: Does the box controller receive an instruction? If yes, proceed to step S20; otherwise, proceed to step S28.
[0097] Step S20: Is the high-pressure main circuit of the refrigerator already powered on? If yes, proceed to step S21; otherwise, proceed to step S24. Step S21: Does the refrigerated box controller allow the main vehicle to output high voltage? If yes, proceed to step S22; otherwise, proceed to step S23.
[0098] Step S22: High voltage is applied to the power module of the refrigerator. According to the high voltage power-on process, the on / off state of relays K6, K5 and K4 is controlled.
[0099] Step S23: Terminate the current power supply operation and report the fault.
[0100] In step S24, relays K6 and K4 are closed.
[0101] In step S25, if both relay K6 and relay K4 are closed, proceed to step S26; otherwise, proceed to step S28.
[0102] Step S26: Send "High pressure request on the main circuit of the refrigerator".
[0103] Step S27: Is the high voltage of the main circuit of the refrigerator successfully powered on? If yes, proceed to step S29; otherwise, proceed to step S28.
[0104] Step S28: Terminate the current power supply operation and report the fault.
[0105] Step S29: Adjust the drive / braking power of the vehicle controller in real time according to the power demand of the received refrigerator box controller.
[0106] Step S30: Check if the power trigger switch for the refrigerator is valid. If yes, proceed to step S29; otherwise, proceed to step S31.
[0107] Step S31: End power supply to the refrigerator.
[0108] When the first power battery supply section fails, the process of supplying power to the refrigerator compartment's electrical module based on the second power battery is as follows: When the main high-voltage circuit of the main vehicle cannot supply high voltage (i.e., relays K1 and K3 must be in the open state due to a fault), and the engine can start and the vehicle controller can operate to control the devices, the vehicle controller sends a request to the refrigerator box controller to output high voltage to the refrigerated truck and use the second power battery as the supporting voltage; after receiving feedback from the refrigerator box controller that the main vehicle high-voltage output is permitted, if the refrigerator box high-voltage circuit is not energized (i.e., the fourth positive relay K9 and the fourth negative relay K11 are in the open state), the vehicle controller will close the first positive relay K4 and the first negative relay K6; if the refrigerator box controller reports that the main vehicle high-voltage output is not permitted, the power supply action will be terminated and a fault will be reported; After the first positive relay K4 and the first negative relay K6 are successfully closed, the vehicle controller sends a high-voltage request for the refrigerator main circuit to the refrigerator controller; otherwise, the power supply operation is terminated and a fault is reported. After the high voltage is successfully applied to the refrigerator circuit, the vehicle controller sends a refrigerator cooling enable command and adjusts the braking power of the motor controller in real time according to the power demand received from the refrigerator controller (the main vehicle driving power is entirely provided by the engine, while the motor controller provides braking power to meet the power demand of all high-voltage loads, ensuring that the state of charge of the refrigerator power battery is maintained within a reasonable range). If the high voltage is not successfully applied to the refrigerator main circuit, the power supply operation is terminated and a fault is reported.
[0109] After receiving feedback from the refrigerator controller that the main vehicle high-voltage output is permitted, if the refrigerator high-voltage circuit is already powered on, the vehicle controller will control the first positive relay K4, the first negative relay K6, and the relay K5 to close or open according to the high-voltage connection procedure, thereby completing the high-voltage connection with the refrigerator power battery and high-voltage load. After the main vehicle high-voltage circuit and the refrigerator high-voltage circuit are successfully connected, the vehicle controller will send a refrigerator cooling enable command and adjust the braking power of the motor controller in real time according to the power demand of the refrigerator controller.
[0110] During the process of the main vehicle outputting high voltage to the refrigerated box, if the power trigger switch of the refrigerated box becomes invalid, the vehicle controller sends a refrigerated box cooling non-enable command and normally terminates the power supply to the refrigerated box, requests a high voltage command for the refrigerated box, and controls the braking power generation of the motor controller to 0kW; when the vehicle controller receives the motor controller discharge command from the refrigerated box, it controls the motor controller to activate the discharge function; when the vehicle controller receives the first positive relay K4 and the first negative relay K6 disconnect command, it controls the first positive relay K4 and the first negative relay K6 to disconnect.
[0111] This invention provides a high-voltage power supply system and control method for a hybrid refrigerated truck, defines a high-voltage architecture scheme for a hybrid refrigerated truck, defines a low-voltage control interface scheme for a hybrid refrigerated truck, and defines a software control flow for the vehicle controller of a hybrid refrigerated truck to realize the power supply function requirements of the refrigerated box.
[0112] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, substrate, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0113] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A high-voltage power supply system for a hybrid refrigerated truck, characterized in that, include: The main vehicle high-voltage system is located in the main vehicle of the hybrid refrigerated truck. The main vehicle high-voltage system includes a first power battery power supply section and a drive power generation section, and the first power battery power supply section and the drive power generation section are selectively connected. A high-voltage system for the refrigerated compartment is located in the refrigerated compartment of the hybrid refrigerated vehicle. The high-voltage system for the refrigerated compartment includes a second power battery power supply section, which is connected to the refrigerated compartment power module and is used to supply power to the refrigerated compartment power module. A high-voltage connection system, wherein the high-voltage connection system is used to connect the main vehicle high-voltage system and the refrigerated box power module; A connection switch system is provided, which is connected between the high-voltage connection system and the main vehicle high-voltage system and / or between the high-voltage connection system and the refrigerator compartment power module, for controlling the connection status between the main vehicle high-voltage system and the refrigerator compartment power module, so as to supply power to the refrigerator compartment power module through the first power battery power supply section and / or the drive generator section when the refrigerator compartment high-voltage system fails.
2. The high-voltage power supply system for hybrid refrigerated trucks according to claim 1, characterized in that, The high-voltage connection system includes: A first connector is connected to the power module of the refrigerator. A second connector is connected to the first connector, and the second connector is also optionally connected to the first power battery power supply section and the drive power generation section.
3. The high-voltage power supply system for hybrid refrigerated trucks according to claim 2, characterized in that, The connection switch system includes: A first positive relay, the first end of which is connected to the second connector, and the second end of which is connected to the positive terminal of the first power battery power supply section and the drive power generation section; The first negative relay has its first end connected to the second connector and its second end connected to the negative terminal of the first power battery power supply section. A first pre-charging circuit, wherein a first end of the first pre-charging circuit is connected to a first end of the first positive relay, and a second end of the first pre-charging circuit is connected to a second end of the first positive relay; The first positive relay, the first negative relay, and the first pre-charging circuit are closed or opened according to the vehicle's high-voltage power-on and power-off sequence. The second positive relay has its first terminal connected to the first connector and its second terminal connected to the first terminal of the refrigerator power module. The second negative relay has its first end connected to the first connector and its second end connected to the second end of the refrigerator power module.
4. The high-voltage power supply system for hybrid refrigerated trucks according to claim 2, characterized in that, The high-voltage power supply system for the hybrid refrigerated truck also includes: A first high-voltage interlock circuit is located at the first connector and is used to detect the connection status between the first power battery power supply section and / or the drive power generation section and the first connector. The second high-voltage interlock circuit, located at the second connector, is used to detect the connection status between the refrigerator's electrical module and the second connector.
5. The high-voltage power supply system for hybrid refrigerated trucks according to claim 3, characterized in that, The drive and power generation section includes an engine, a generator, and a motor controller. The motor controller is connected to the generator and the second terminal of the first positive relay, and the generator is connected to the engine. The first power battery power supply section includes a first power battery, a third positive relay, a third negative relay, and a second pre-charging circuit. The first terminal of the third positive relay is connected to the positive terminal of the first power battery, and the second terminal of the third positive relay is connected to the motor controller and the second terminal of the first positive relay. The first terminal of the third negative relay is connected to the negative terminal of the first power battery, and the second terminal of the third negative relay is connected to the second terminal of the first negative relay. The second pre-charging circuit is connected to both ends of the third positive relay. The third positive relay, the third negative relay, and the second pre-charging circuit are closed or opened according to the timing of the vehicle's high-voltage power-on and power-off.
6. The high-voltage power supply system for hybrid refrigerated trucks according to claim 1, characterized in that, The second power battery power supply section includes a second power battery, a fourth positive relay, a fourth negative relay, and a third pre-charging circuit. The first terminal of the fourth positive relay is connected to the positive terminal of the second power battery, the second terminal of the fourth positive relay is connected to the first terminal of the refrigerator power module, the first terminal of the fourth negative relay is connected to the negative terminal of the second power battery, the second terminal of the fourth negative relay is connected to the second terminal of the refrigerator power module, and the third pre-charging circuit is connected to both ends of the fourth positive relay. The fourth positive relay, the fourth negative relay, and the third pre-charging circuit are used to close or open according to the vehicle's high-voltage power-on / off sequence.
7. The high-voltage power supply system for hybrid refrigerated trucks according to any one of claims 1-6, characterized in that, The high-voltage power supply system for hybrid refrigerated trucks also includes: The fifth positive relay has its first terminal connected to the positive terminal of the power supply section of the second power battery, and its second terminal adapted to be connected to the positive terminal of the charging power supply. The fifth negative relay has its first terminal connected to the negative terminal of the power supply section of the second power battery, and its second terminal adapted to be connected to the negative terminal of the charging power supply. The fifth positive relay and the fifth negative relay are used to connect to the charging power supply to charge the second power battery.
8. A hybrid refrigerated truck, characterized in that, include: The main vehicle and the refrigerated container, wherein the refrigerated container is located on the main vehicle; The high-voltage power supply system for hybrid refrigerated trucks as described in any one of claims 1-8; The vehicle controller, refrigerator compartment controller, local start switch, and refrigerator compartment power trigger switch are located in the refrigerator compartment, while the vehicle controller and refrigerator compartment power trigger switch are located in the main vehicle. The refrigerator box controller is connected to the local start switch and is used to control the switch in the high voltage power supply system of the hybrid refrigerated vehicle to supply power to the refrigerator box power module by the power supply part of the second power battery when the main vehicle high voltage system fails and the local start switch is activated. The vehicle controller is connected to the refrigerator box controller and the refrigerator box power trigger switch. When the switch signal of the refrigerator box power trigger switch is valid, it controls the switch in the high-voltage power supply system of the hybrid refrigerated vehicle so that the main vehicle high-voltage system supplies power to the refrigerator box power module.
9. A control method for a high-voltage power supply system of a hybrid refrigerated truck, characterized in that, For the high-voltage power supply system of the hybrid refrigerated truck according to any one of claims 1-7 or the hybrid refrigerated truck according to claim 8, the control method includes: The connection status between the main vehicle high-voltage system and the refrigerator compartment power module is detected, as is the connection status between the refrigerator compartment high-voltage system and the refrigerator compartment power module. When the main vehicle high voltage system and the refrigerator box power module are normally connected, the first power battery power supply part and / or the driving power generation part of the main vehicle high voltage system supply power to the refrigerator box power module. When the connection between the main vehicle high-voltage system and the refrigerator compartment power module is abnormal and the connection between the refrigerator compartment high-voltage system and the refrigerator compartment power module is normal, the refrigerator compartment high-voltage system supplies power to the refrigerator compartment power module. When the connection between the main vehicle high-voltage system and the refrigerator box power module is normal and one of the first power battery power supply section and the drive power generation section in the main vehicle high-voltage system is abnormal, the normally functioning part of the first power battery power supply section and the drive power generation section shall supply power to the refrigerator box power module.
10. The control method according to claim 9, characterized in that, The control method further includes at least one of the following: When the main vehicle high-voltage system or the refrigerated box high-voltage system is started to supply power to the electrical components of the refrigerated box, the corresponding switch in the high-voltage system of the hybrid refrigerated vehicle is controlled to close or open according to the high-voltage power-on and power-off sequence of the vehicle. When the power generation unit supplies power to the refrigerator box power module, the drive or braking power of the motor controller is adjusted based on the power demand of the refrigerator box power module. A prompt will be issued when the connection status between the main vehicle high-voltage system and the refrigerator compartment power module is abnormal, or when the connection status between the refrigerator compartment high-voltage system and the refrigerator compartment power module is abnormal, or when the main vehicle high-voltage system is abnormal, or when the refrigerator compartment high-voltage system is abnormal.