Bidirectional power supply chassis and truck

Abstract

The invention relates to a two-way power supply chassis and a truck and relates to the technical field of vehicles, the two-way power supply chassis comprises a chassis frame, wheels, battery units and a wire harness assembly, the wheels are rotatably installed on the chassis frame, at least two battery bins used for containing the battery units are arranged above the chassis frame, and the two-way power supply chassis further comprises the wire harness assembly; the wire harness assembly comprises a high-voltage cable, a low-voltage wire harness and a high-low-voltage connector, the high-low-voltage connector is composed of a high-voltage interface area and a low-voltage interface area, the high-voltage interface area is connected with the high-voltage cable, the low-voltage interface area is connected with the low-voltage wire harness, and the high-voltage cable and the low-voltage wire harness can be electrically connected with the battery units; the battery unit comprises a battery and a BMS controller, and the battery is detachably connected to the battery bin. The truck comprises a tractor and a two-way power supply chassis, and the tractor is provided with a socket used for being connected with the high-low voltage connector in an inserted mode to supply power to the driving motor. The method has the advantage that electric energy can be quickly supplemented during transportation so as to improve the transportation efficiency.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a bidirectional power supply chassis and a truck. Background Art

[0002] Logistics plays a key role in economic activities, enabling the spatial and temporal transfer of goods through basic functions such as transportation, storage, loading and unloading, handling, and distribution. Road transport is a component of the logistics transportation system, and trucks play an irreplaceable role in this process. Trucks are generally categorized as standard trucks, specialized trucks, tractors, and trailers. Trailers are often used in combination with tractors to form a complete transportation vehicle.

[0003] With the development of new energy technologies, trucks are gradually shifting from traditional fuel-powered vehicles to electric vehicles. However, due to the limitations of battery energy storage, electric trucks have a short range on a single charge. During transportation, especially long-distance hauls, they need to stop at charging stations multiple times, significantly reducing their efficiency. While some electric trucks add additional battery packs to power the tractor to increase range, this undoubtedly significantly increases the cost of the trucks, resulting in a low operating income / cost ratio for electric truck transportation. Summary of the Invention

[0004] In order to improve the current problem of low operating efficiency of electric trucks due to the time-consuming charging during transportation, the present application provides a bidirectional power supply chassis and truck.

[0005] In the first aspect, the present application provides a bidirectional power supply chassis adopting the following technical solutions: A bidirectional power supply chassis includes a chassis frame, wheels, and battery units. The wheels are rotatably mounted on the chassis frame. The chassis frame is provided with at least two battery compartments for accommodating the battery units. The bidirectional power supply chassis also includes a wiring harness assembly, which includes a high-voltage cable, a low-voltage wiring harness, and high- and low-voltage connectors. The high- and low-voltage connectors are composed of a high-voltage interface area and a low-voltage interface area. The high-voltage interface area is connected to the high-voltage cable, and the low-voltage interface area is connected to the low-voltage wiring harness. Both the high-voltage cable and the low-voltage wiring harness are capable of conductive connection to the battery units. The battery unit includes a battery and a BMS controller, and the battery is detachably connected to the battery compartment.

[0006] By adopting this technical solution, when the bidirectional power supply chassis is used in conjunction with a tractor, the high and low voltage connectors are connected to the sockets on the tractor, allowing the battery unit to supply power to the tractor's motor via high-voltage cables. This reduces the capacity of the tractor's own battery, lowering production costs and increasing the tractor's range.

[0007] The battery charge information can also be monitored by the BMS controller via a low-voltage wiring harness. During transportation, if a battery cell runs low and needs to be replaced, the battery can be detachably connected to the battery compartment, allowing for direct replacement without waiting for a long recharge, thus improving transportation efficiency. Furthermore, the number of batteries can be freely selected based on the transport mileage, and battery cells can be switched between. Different bidirectional power supply chassis can be used interchangeably, facilitating mutual rescue and emergency response during travel.

[0008] Since the bidirectional power supply chassis has its own battery, it can be used in any combination with the appropriate tractor. When the transportation work of the previous tractor is completed, it can be combined with another tractor at any time to carry out the next transportation task, thereby improving the utilization rate of the trailer.

[0009] Preferably, the bidirectional power supply chassis further includes a thermal management integrated module, which is connected to the battery unit.

[0010] Preferably, the thermal management integrated module includes an electric heater and a refrigeration module, and the refrigeration module includes a water cooling system and / or an air cooling system.

[0011] Preferably, the bidirectional power supply chassis further comprises a cable reeling mechanism, and the high-voltage cable and the low-voltage harness are wound around one end of the cable reeling mechanism near the high- and low-voltage connectors.

[0012] Preferably, the bidirectional power supply chassis further includes a range extender unit, and the range extender unit is conductively connected to the high-voltage interface via a high-voltage cable.

[0013] Preferably, the range extender unit is conductively connected to the battery via a high-voltage cable.

[0014] Preferably, the high and low voltage joints are provided with an insulating partition for separating the high voltage interface area from the low voltage interface area.

[0015] Preferably, the cross-sectional profile of the high-pressure interface area perpendicular to the plugging direction is triangular, and the cross-sectional profile of the low-pressure interface area perpendicular to the plugging direction is an isosceles trapezoid.

[0016] In the second aspect, the present application provides a truck that adopts the following technical solution: A truck includes a tractor, the tractor includes a drive motor for providing driving force to wheels, and the truck also includes the above-mentioned two-way power supply chassis. The tractor is provided with a socket for connecting to a high and low voltage connector to supply power to the drive motor.

[0017] In summary, this application has at least one of the following beneficial technical effects: 1. The battery capacity of the tractor can be reduced, which reduces the production cost of the tractor and increases the endurance of the tractor; 2. Since the battery and the battery compartment are detachable, you can directly replace the new battery without having to wait for a long time to charge, which improves transportation efficiency; 3. The detachable battery unit makes it easy to select the number of batteries to be carried according to the transport itinerary, and also provides the possibility for emergency rescue between the same type of two-way power supply chassis due to power shortage during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the truck in this application; Figure 2 This is a schematic diagram of a layout of a battery unit and thermal management integrated module embodied in this application; Figure 3 This is another schematic diagram of the layout of the battery unit and thermal management integrated module embodied in this application; Figure 4 for Figure 3 A top view of Figure 5 It is a structural diagram showing the cable reeling mechanism; Figure 6 for Figure 5 Enlarged view of part A in the middle.

[0019] Description of reference numerals: Tractor; 2. Chassis frame; 21. Battery compartment; 3. Cable retraction mechanism; 31. Through hole; 4. Thermal management integrated module; 5. Battery unit; 6. Range extender unit; 7. High and low voltage connectors; 71. High voltage interface area; 72. Low voltage interface area; 73. High voltage plug; 74. Low voltage plug; 8. Cable. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-6 This application is described in further detail.

[0021] The embodiment of the present application discloses a truck, Figure 1 and Figure 2 The truck consists of a tractor 1 and a bidirectional power supply chassis. The tractor 1 is electrically driven and is equipped with a vehicle controller unit (VCU), a motor controller unit (MCU), and a battery management system (BMS).

[0022] refer to Figure 2 and Figure 3The bidirectional power supply chassis includes a chassis frame 2, wheels and battery units 5. The wheels are rotatably mounted on the chassis frame 2. The chassis frame 2 is provided with at least two battery compartments 21 for accommodating the battery units 5. The battery compartment 21 can be located on the bottom surface of the chassis frame 2 or on the top of the chassis frame 2. The battery compartment 21 is preferably a rectangular groove, and the battery unit 5 is a flat rectangular parallelepiped as a whole, and the battery unit 5 is adapted to the battery compartment 21. The battery unit 5 includes a battery and a BMS controller, and the battery is detachably connected to the battery compartment 21. The number of battery compartments 21 can be 1, 2, 3, 4 or more, which can be selected according to the design requirements to meet the number of battery units 5 required for transporting different mileages.

[0023] refer to Figures 4 to 6 The bidirectional power supply chassis also includes a wiring harness assembly (not shown), which includes a high-voltage cable, a low-voltage wiring harness, and a high- and low-voltage connector 7. The high- and low-voltage connector 7 consists of a high-voltage interface area 71 and a low-voltage interface area 72. The high-voltage interface area 71 connects to the high-voltage cable, and the low-voltage interface area 72 connects to the low-voltage wiring harness. Both the high-voltage cable and the low-voltage wiring harness can be electrically connected to the battery unit 5. To facilitate wiring, the high-voltage cable and the low-voltage wiring harness near the high- and low-voltage connector 7 form a single cable 8. The high-voltage interface area 71 is equipped with a high-voltage plug 73, and the low-voltage interface area 72 is equipped with a low-voltage plug 74.

[0024] The high- and low-voltage joint 7 is provided with an insulating partition for separating the high-voltage interface area 71 from the low-voltage interface area 72 .

[0025] The cross-sectional profile of the high-pressure interface area 71 perpendicular to the plugging direction is triangular, and the cross-sectional profile of the low-pressure interface area 72 perpendicular to the plugging direction is an isosceles trapezoid.

[0026] Correspondingly, the tractor 1 is provided with a socket adapted to the high and low voltage connectors 7, so that after the high and low voltage connectors 7 are plugged into the sockets on the tractor 1, the battery unit 5 can power the tractor 1, and at the same time, the BMS control system of the battery power supply 5 can be connected to the BMS control system of the tractor 1.

[0027] When the bidirectional power supply chassis is used in combination with a tractor 1, the high and low voltage connectors 7 are connected to the sockets on the tractor 1, allowing the battery unit 5 to supply power to the motor of the tractor 1 via the high-voltage cable. This reduces the capacity of the battery in the tractor 1, lowering the production cost of the tractor 1 and increasing the endurance of the tractor 1.

[0028] At the same time, the battery power information can be monitored by the BMS controller through the low-voltage wiring harness. Since the BMS controller is also connected to the BMS control system of the tractor 1, during transportation, when the battery 5 is low and needs to be replaced, the battery can be directly replaced with a new battery because the battery is detachably connected to the battery compartment 21, without having to wait for a long time to charge, thereby improving transportation efficiency. In addition, the number of batteries can be freely selected according to the transportation distance, and the battery units 5 can be switched between and can be used on different bidirectional power supply chassis, providing convenience for mutual rescue and emergency during driving.

[0029] Since the bidirectional power supply chassis has its own battery, it can be used in any combination with the adapted tractor 1. When the transport work of the previous tractor 1 is completed, it can be combined with another tractor 1 at any time to carry out the next transport task, thereby improving the utilization rate of the trailer.

[0030] refer to Figures 2 to 4 In order to make the battery unit 5 on the bidirectional power supply chassis more stable and safe during operation, the bidirectional power supply chassis also includes a thermal management integrated module 4, which is connected to the battery unit 5. The thermal management integrated module 4 includes an electric heater and a refrigeration module, and the refrigeration module includes a water cooling system and / or an air cooling system. When the battery unit 5 is located below the chassis frame 2, the thermal management integrated module 4 can be set at the bottom of one end of the chassis frame 2 close to the tractor 1. In order to better dissipate heat, the structural part of the thermal management integrated module 4 can be set in the form of multiple fins. When the battery unit 5 is located above the chassis frame 2, the thermal management integrated module 4 is correspondingly installed above the end of the chassis frame 2, and the heat dissipation structure part of the thermal management integrated module 4 can be a hollow rectangular structure.

[0031] refer to Figures 3 to 5 To facilitate turning, the cable 8 between the tractor 1 and the bidirectional power supply chassis is kept at an appropriate length to maintain smooth power supply. The bidirectional power supply chassis also includes a cable retractor mechanism 3, around which the cable 8 connected to the high and low voltage connectors 7 is wound and reeled. The cable retractor mechanism 3 comprises a rectangular housing with transverse through-holes 31 disposed therein. This allows the cable 8 to be extended smoothly when the tractor 1 turns left or right. When the tractor 1 is traveling straight, the cable 8 is stored in the cable retractor mechanism 3, preventing the cable 8 from being exposed and causing entanglement or wear.

[0032] The cable retracting mechanism 3 can be fixedly mounted on the end of the chassis frame 2 near the tractor 1. The cable retracting mechanism 3 can employ a spring-loaded cable reel, utilizing a spiral spring as power to reel in the cable 8. When the cable 8 is pulled out, the spiral spring tightens to store energy. When the external force is removed, the spring releases energy, and the reel automatically reels in the cable 8. Alternatively, the cable retracting mechanism 8 can employ a weighted cable reel.

[0033] As needed, the cable reeling mechanism 3 may be fixedly mounted on the end of the tractor 1 , and in this case, a socket for plugging with the high and low voltage connectors 7 is provided on the bidirectional power supply chassis.

[0034] refer to Figure 3 and Figure 4 The bidirectional power supply chassis also includes a range extender unit 6, which is electrically connected to the high-voltage interface area 71 via a high-voltage cable. This allows the range extender unit 6 to be activated when the battery unit 5 mounted on the chassis frame 2 runs low on power, generating power and supplying the motor of the tractor 1 via the high-voltage cable. Furthermore, the range extender unit 6 is electrically connected to the batteries of the battery unit 5 via the high-voltage cable. This allows the range extender unit 6 to charge the battery unit 5 if one or more of the battery units 5 are running low on power. The range extender unit 6 can be an internal combustion engine generator.

[0035] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bidirectional power supply chassis, comprising a chassis frame (2), wheels and battery units (5), wherein the wheels are rotatably mounted on the chassis frame (2), and the chassis frame (2) is provided with at least two battery compartments (21) for accommodating the battery units (5), characterized in that: The bidirectional power supply chassis also includes a wiring harness assembly, which includes a high-voltage cable, a low-voltage wiring harness, and a high- and low-voltage connector (7). The high- and low-voltage connector (7) is composed of a high-voltage interface area (71) and a low-voltage interface area (72). The high-voltage interface area (71) is connected to the high-voltage cable, and the low-voltage interface area (72) is connected to the low-voltage wiring harness. Both the high-voltage cable and the low-voltage wiring harness can be conductively connected to the battery unit (5). The battery unit (5) includes a battery and a BMS controller, and the battery is detachably connected to the battery compartment (21).

2. The bidirectional power supply chassis according to claim 1, characterized in that: The bidirectional power supply chassis further includes a thermal management integrated module (4), which is connected to the battery unit (5).

3. The bidirectional power supply chassis according to claim 2, characterized in that: The thermal management integrated module (4) comprises an electric heater and a refrigeration module, and the refrigeration module comprises a water cooling system and / or an air cooling system.

4. The bidirectional power supply chassis according to any one of claims 1 to 3, characterized in that: The bidirectional power supply chassis also includes a cable reeling mechanism (3), and one end of the high-voltage cable and the low-voltage wire harness close to the high- and low-voltage connector (7) is wound and reeled around the cable reeling mechanism (3).

5. The bidirectional power supply chassis according to any one of claims 1 to 3, characterized in that: The bidirectional power supply chassis further includes a range extender unit (6), and the range extender unit (6) is conductively connected to the high-voltage interface area (71) via a high-voltage cable.

6. The bidirectional power supply chassis according to claim 5, characterized in that: The range extender unit (6) is electrically connected to the battery via a high-voltage cable.

7. The bidirectional power supply chassis according to claim 1, 2, 3 or 6, characterized in that: The high- and low-pressure joint (7) is provided with an insulating partition for separating a high-pressure interface area (71) from a low-pressure interface area (72).

8. The bidirectional power supply chassis according to claim 7, characterized in that: The cross-sectional profile of the high-pressure interface area (71) perpendicular to the plugging direction is triangular, and the cross-sectional profile of the low-pressure interface area (72) perpendicular to the plugging direction is isosceles trapezoidal.

9. A truck comprising a tractor (1), the tractor (1) comprising a drive motor for providing driving force to wheels, characterized in that: The truck further comprises a bidirectional power supply chassis as claimed in any one of claims 1 to 8, and the tractor (1) is provided with a socket for connecting to a high and low voltage connector (7) to supply power to the drive motor.

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