Dual-power vehicle

Abstract

The dual-power vehicle comprises a vehicle body, a first power source and a second power source, the vehicle body is provided with a load, the first power source is detachably installed on the vehicle body, the second power source is fixedly installed on the vehicle body, and the first power source and the second power source are electrically connected to the load through a discharging circuit. According to the dual power supply, the two power supplies can provide load electric energy together, the stability, the reliability, the flexibility and the fault-tolerant capability of the power system of the dual power supply vehicle are improved, the first power supply is detachably arranged, replacement is convenient, and the energy complementing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a dual-power vehicle. Background Art

[0002] An electric vehicle generally includes a vehicle body, a power source and a load. The power source and the load are both arranged on the vehicle body, and the power source and the load are electrically connected to supply power to the load. The load may include an electric motor, and the load can provide driving force for the vehicle body to move forward. In the prior art, an electric vehicle is usually only equipped with one power source. When the single power source supplies power, there are problems such as unstable voltage, which affects the driving quality. In the prior art, the power source is fixedly connected to the vehicle body and is not easy to disassemble and replace. When the power is exhausted, the vehicle cannot move and can only be connected to a charging device for charging, which takes a long time and the user experience is not good. Summary of the Utility Model

[0003] To solve the above technical problems, the present application provides the following technical solutions:

[0004] The utility model provides a dual-power vehicle, including:

[0005] A vehicle body, which has a load;

[0006] A first power source, which is detachably installed on the vehicle body;

[0007] A second power source, which is fixedly installed on the vehicle body, and the first power source and the second power source are electrically connected to the load through a discharge circuit.

[0008] Optionally, the vehicle body includes a vehicle head and a vehicle body;

[0009] The vehicle body is connected to the vehicle head;

[0010] Both the first power source and the second power source are arranged on the vehicle body.

[0011] Optionally, the first power source and the second power source are respectively arranged on two sides of the vehicle body along the height direction.

[0012] Optionally, the vehicle head has front wheels, and the vehicle body has rear wheels;

[0013] The second power source is located between the front wheels and the rear wheels.

[0014] Optionally, both the first power source and the second power source are arranged on one side of the vehicle body close to the vehicle head.

[0015] Optionally, a battery base is arranged on the vehicle body;

[0016] The battery base has a guiding body and a locking mechanism. The guiding body is used to guide the first power source to be seated on the battery base, and the locking mechanism is used to lock or unlock the first power source.

[0017] Optionally, the discharge circuit includes a main circuit connected to the load, and both the first power source and the second power source are connected in parallel to the main circuit.

[0018] Optionally, the discharge circuit includes a first parallel circuit and a second parallel circuit;

[0019] The main circuit includes a main positive circuit and a main negative circuit, and the main positive circuit and the main negative circuit are respectively electrically connected to the load of the vehicle body;

[0020] Both the first parallel circuit and the second parallel circuit are respectively connected to the main positive circuit and the main negative circuit;

[0021] The first power source is arranged in the first parallel circuit, and the second power source is arranged in the second parallel circuit.

[0022] Optionally, the first parallel circuit includes a first main circuit and two parallel first branches. Both of the two first branches are connected to the first main circuit. The first main circuit and the two first branches are respectively connected to the main positive circuit and the main negative circuit. A first resistor and a first pre-charge relay are arranged on one of the first branches, and a first main contactor is arranged on the other first branch.

[0023] Optionally, the second parallel circuit includes a second main circuit and two parallel second branches. Both of the two second branches are connected to the second main circuit. The second main circuit and the two second branches are respectively connected to the main positive circuit and the main negative circuit. A second resistor and a second pre-charge relay are arranged on one of the second branches, and a second main contactor is arranged on the other second branch.

[0024] By adopting the above technical solutions, the present application has the following beneficial effects:

[0025] The dual power sources of the present application can jointly provide electrical energy for the load, improving the stability, reliability, flexibility, and fault tolerance of the power system of the dual-power vehicle. The first power source is detachably arranged, which facilitates replacement and improves the energy replenishment efficiency.

[0026] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0027] The accompanying drawings, as a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 Show a schematic structural diagram of a dual-power vehicle provided by an embodiment of the present application;

[0029] Figure 2 Show a schematic structural diagram of the battery base of the dual-power vehicle provided by an embodiment of the present application;

[0030] Figure 3 Show a schematic diagram of the discharge circuit of the dual-power vehicle provided by an embodiment of the present application;

[0031] Figure 4 Show a schematic diagram of the charging circuit of the dual-power vehicle provided by an embodiment of the present application.

[0032] In the figure: 1, vehicle body; 1a, vehicle head; 1b, vehicle body; 2, first power source; 3, second power source; 4, battery base; 41, guiding body; 42, locking mechanism; 43, electrical connection socket; 5, first resistor; 6, second resistor; 7, first pre-charge relay; 8, second pre-charge relay; 9, first main contactor; 10, second main contactor; 11, load; 12, charging interface.

[0033] It should be noted that these accompanying drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] See Figures 1 to 4 As shown, the embodiment of the present application provides a dual - power vehicle, including: a vehicle body 1, a first power source 2, and a second power source 3. The vehicle body 1 has a load 11, and the load 11 can include an electric motor, vehicle lights, a vehicle electrical control system, and so on. The first power source 2 is detachably installed on the vehicle body 1, the second power source 3 is fixedly installed on the vehicle body 1, and the first power source 2 and the second power source 3 are electrically connected to the load 11 through a discharge circuit. The dual - power setting of the present application has two power sources that can jointly provide electrical energy for the load 11, improving the stability, reliability, flexibility, and fault - tolerance ability of the power system of the dual - power vehicle. The detachable setting of the first power source 2 facilitates replacement and improves the energy replenishment efficiency.

[0039] The first power source 2 can be the main power source with a large energy storage capacity, supporting both charging and battery swapping. The second power source 3 can be fixed on the vehicle body 1, and the second power source 3 only supports charging for energy replenishment. The dual - power vehicle can be powered by only the first power source 2 or the second power source 3, or can be powered by both the first power source 2 and the second power source 3 simultaneously, that is, the first power source 2 and the second power source 3 can operate in parallel.

[0040] In some possible implementation schemes, the vehicle body 1 includes a vehicle head 1a and a vehicle body 1b, the vehicle body is connected to the vehicle head, and both the first power source 2 and the second power source 3 are arranged on the vehicle body 1b. The vehicle body 1b has a larger space, so both power sources can be arranged on the vehicle body 1b, behind the vehicle head 1a.

[0041] The first power source 2 and the second power source 3 can be separately arranged on both sides of the vehicle body 1b along the height direction. The first power source 2 is located at the top of the vehicle body 1b and behind the vehicle head 1a, and the second power source 3 can be located at the bottom of the vehicle body 1b, that is, the second power source 3 is fixed on the side of the vehicle chassis facing the ground, thus making full use of the space.

[0042] The vehicle head 1a has front wheels, the vehicle body 1b has rear wheels, and the second power source 3 can be located between the front wheels and the rear wheels. The distance between the front wheels and the rear wheels is relatively large, which facilitates the arrangement of the second power source 3.

[0043] Both the first power source 2 and the second power source 3 are arranged on the side of the vehicle body 1b close to the vehicle head 1a.

[0044] In some possible embodiments, as shown in Figure 2 Figure [not shown], a battery base 4 may be provided on the vehicle body 1b. The battery base 4 has a guide body 41 and a locking mechanism 42. The guide body 41 is used to guide the first power source 2 to seat on the battery base 4, and the locking mechanism 42 is used to lock or unlock the first power source 2.

[0045] The battery base 4 has a frame for fixing to the vehicle body 1b. A plurality of guide bodies 41 are provided on the frame. Guide surfaces are provided on the guide bodies 41. Each of the guide bodies 41 extends in a direction perpendicular to the frame. The locking mechanism 42 is provided on the guide body 41. A telescopic groove is provided on the guide body 41. The locking mechanism 42 includes a plurality of telescopic components. Each of the telescopic components is respectively connected to the corresponding guide body 41, and the telescopic component can telescopically move along the telescopic groove. The locking mechanism 42 has a locked state and a released state. In the locked state, the telescopic component extends out of the telescopic groove and is clamped to a corresponding part on the first power source 2. In the released state, the telescopic component retracts into the telescopic groove. At this time, the first power source 2 is in a de-clamped state and can be lifted off the first power source 2 for replacement of the first power source 2. The telescopic component can be a linear motor, an electric push rod, etc.

[0046] It should be noted that the battery base 4 of the present application can adopt the structure of the battery base 4 disclosed in the patent application with the application number 201911357127.8 and the theme name: "A Three-stage Positioning and Locking Device and Method for a Battery Box of an Electric Heavy Truck for Battery Replacement". The present application can also make adaptive modifications to this battery base 4 to adapt to the structure of the dual-power vehicle of the present application.

[0047] In a possible embodiment, an electrical connection socket 43 may also be provided on the battery base 4. The electrical connection socket 43 is electrically connected to the load 11. In the state where the first power source 2 is installed in the battery base 4, the first power source 2 is electrically connected to the electrical connection socket 43.

[0048] In some possible embodiments, as shown in Figure 3 Figure [not shown], the discharge circuit includes a main circuit connected to the load 11. The first power source 2 and the second power source 3 are both connected in parallel to the main circuit. The first power source 2 and the second power source 3 can be powered in parallel, which can provide a larger current output and enhance the power supply capacity and stability of the power source.

[0049] In some possible embodiments, the discharge circuit includes a first parallel circuit and a second parallel circuit, the main circuit includes a main positive circuit and a main negative circuit, the main positive circuit and the main negative circuit are respectively electrically connected to the load 11 of the vehicle body 1, the first parallel circuit and the second parallel circuit are both respectively connected to the main positive circuit and the main negative circuit, the first power source 2 is arranged in the first parallel circuit, and the second power source 3 is arranged in the second parallel circuit.

[0050] Among them, the first parallel circuit includes a first main circuit and two parallel first branches, both of the two first branches are connected to the first main circuit, the first main circuit and the two first branches are respectively connected to the main positive circuit and the main negative circuit, a first resistor 5 and a first precharge relay 7 are arranged on one of the first branches, and a first main contactor 9 is arranged on the other first branch.

[0051] Similarly, the second parallel circuit includes a second main circuit and two parallel second branches, both of the two second branches are connected to the second main circuit, the second main circuit and the two second branches are respectively connected to the main positive circuit and the main negative circuit, a second resistor 6 and a second precharge relay 8 are arranged on one of the second branches, and a second main contactor 10 is arranged on the other second branch.

[0052] The first branch with the first resistor 5 and the first precharge relay 7 constitutes the precharge circuit of the first power source 2, which plays a role in protecting the circuit. When the first main contactor 9 is closed, the first power source 2 can be connected to the main circuit. The second branch with the second resistor 6 and the second precharge relay 8 constitutes the precharge circuit of the second power source 3. When the second main contactor 10 is closed, the second power source 3 can be connected to the main circuit.

[0053] See Figure 4 As shown, the dual-power vehicle further includes a charging circuit, and the structure of the charging circuit can be substantially the same as that of the discharge circuit, only replacing the load 11 with a charging interface 12.

[0054] Embodiment 2

[0055] Embodiment 2 of the present application further details the dual-power vehicle. The dual-power vehicle includes: a vehicle body 1, a working circuit, a controller, a first power source 2, and a second power source 3. The working circuit is arranged on the vehicle body 1, and the working circuit can be a charging circuit or a discharge circuit. The first power source 2 and the second power source 3 are both arranged on the vehicle body 1, and the first power source 2 and the second power source 3 can be connected to the working circuit. The controller is electrically connected to the working circuit, and the controller is used to connect one of the first power source 2 and the second power source 3 to the working circuit according to the voltage values of the first power source 2 and the second power source 3, or to parallel the first power source 2 and the second power source 3 to the working circuit.

[0056] The dual - power vehicle may include a voltage sensor for detecting the voltages of the first power source 2 and the second power source 3, and the voltage sensor is electrically connected to the controller. When the controller determines that the voltages of the first power source 2 and the second power source 3 are close, it can control the parallel connection of the first power source 2 and the second power source 3 to the working circuit, thereby increasing the power output capacity and extending the endurance.

[0057] Optionally, the working circuit includes a first parallel circuit and a second parallel circuit, the main circuit includes a main positive - pole circuit and a main negative - pole circuit, the main positive - pole circuit and the main negative - pole circuit are respectively electrically connected to the load 11 or the charging interface 12 of the vehicle body 1, the first parallel circuit and the second parallel circuit are both respectively connected to the main positive - pole circuit and the main negative - pole circuit, the first power source 2 is arranged in the first parallel circuit, the second power source 3 is arranged in the second parallel circuit, and the controller is electrically connected to the first parallel circuit and the second parallel circuit respectively to control the on - off of the first parallel circuit and the second parallel circuit.

[0058] Specifically, the first parallel circuit includes a first main circuit and two parallel first branches, both of the two first branches are connected to the first main circuit, the first main circuit and the two first branches are respectively connected to the main positive - pole circuit and the main negative - pole circuit, a first resistor 5 and a first pre - charge relay 7 are arranged on one of the first branches, and a first main contactor 9 is arranged on the other first branch. The second parallel circuit includes a second main circuit and two parallel second branches, both of the two second branches are connected to the second main circuit, the second main circuit and the two second branches are respectively connected to the main positive - pole circuit and the main negative - pole circuit, a second resistor 6 and a second pre - charge relay 8 are arranged on one of the second branches, and a second main contactor 10 is arranged on the other second branch. The controller is electrically connected to the first pre - charge relay 7, the second pre - charge relay 8, the first main contactor 9 and the second main contactor 10 respectively.

[0059] Embodiment Three

[0060] Embodiment Three of the present application provides a control method for the dual - power vehicle in the above - mentioned embodiment, including:

[0061] Step S1: Detect the voltages of the first power source 2 and the second power source 3 on the dual - power vehicle;

[0062] Step S2: Determine whether the voltage difference between the first power source 2 and the second power source 3 is less than a set value. If the determination result is yes, go to step S3; otherwise, go to step S4;

[0063] Step S3: Control the parallel connection of the first power source 2 and the second power source 3 of the dual - power vehicle to the working circuit of the dual - power vehicle, and the control ends;

[0064] Step S4: Control one of the first power supply 2 and the second power supply 3 to be connected to the working circuit of the dual-power vehicle.

[0065] It should be noted that the control method of the present application is designed according to the characteristics of the dual-power vehicle of the present application. The first power supply 2 of the dual-power vehicle of the present application is detachably installed on the vehicle body 1 and can be replaced for power replenishment. After the first power supply 2 is replaced, the voltage will change. Therefore, it cannot be directly connected in parallel with the second power supply 3 to the working circuit. Therefore, the control method of the present application will detect the voltages of the two power supplies, and only when the voltage difference between the two voltages is less than the set value, will the two power supplies be simultaneously incorporated into the working circuit.

[0066] When the working circuit is a discharging circuit, as shown in Figure 3 That is, the working circuit is electrically connected to the load 11 to provide electrical energy to the load 11. The load 11 may include a motor. In step S4, control the one with the larger voltage value among the first power supply 2 and the second power supply 3 to be connected to the working circuit of the dual-power vehicle, first consume the electrical energy of the power supply with the larger voltage, so that its voltage gradually decreases, and when the voltage difference between the two power supplies is less than the set value, control both the first main contactor 9 and the second main contactor 10 to conduct, and connect the first power supply 2 and the second power supply 3 to the circuit simultaneously.

[0067] When the working circuit is a charging circuit, as shown in Figure 4 That is, the working circuit is connected to an external charger to charge the first power supply 2 and the second power supply 3 on the vehicle body 1. In step S4, control the one with the smaller voltage value among the first power supply 2 and the second power supply 3 to be connected to the working circuit of the dual-power vehicle. First, charge the power supply with the smaller voltage. As the charging progresses, the voltage difference between the first power supply 2 and the second power supply 3 will gradually decrease. When the voltage difference between the two is less than the set value, the two power supplies can be incorporated into the charging circuit to charge the two power supplies simultaneously.

[0068] After step S4, it further includes: step S5: Return to step S1. That is, the controller continuously detects the voltages of the first power supply 2 and the second power supply 3 on the two dual-power vehicles, and performs corresponding control at any time, improving safety and reliability.

[0069] In step S2, it further includes a step of judging the working condition of the dual-power vehicle. If it is judged that the dual-power vehicle is in a static working condition, the set value is a; if it is judged that the dual-power vehicle is in a driving working condition, the set value is b; if it is judged that the dual-power vehicle is in a charging working condition, the set value is c; where b is not greater than a.

[0070] The set value a can be understood as the maximum allowable voltage difference between the first power supply 2 and the second power supply 3 when one of the first main contactor 9 and the second main contactor 10 is closed and the vehicle speed is zero.

[0071] The set value b can be understood as the maximum allowable value of the voltage difference between the first power supply 2 and the second power supply 3 when one of the first main contactor 9 and the second main contactor 10 is closed and the vehicle speed is not zero.

[0072] As Figure 4 shown, when the working circuit is a charging circuit, the charging circuit of the vehicle and Figure 3 the discharge circuit shown are basically the same, and only the load 11 part needs to be changed to a charging interface 12. At this time, the set value c can be understood as the maximum allowable value of the voltage difference between the first power supply 2 and the second power supply 3 when one of the first main contactor 9 and the second main contactor 10 is closed and in the charging state.

[0073] The static working condition can be understood as that the load 11 on the vehicle body 1 is energized, but the load 11 is not operating. The driving working condition can be understood as that the load 11 is energized and starts to operate. For example, the vehicle body 1 has traveled, and the traveling speed is not zero, and electric energy is being consumed. Compared with the static working condition, in the driving working condition, the change of the throttle and the change of the vehicle speed will affect the change of the voltage. Therefore, a is greater than b, and the reliability is better, making the voltage consistency of the two power supplies connected in parallel to the working circuit good.

[0074] In steps S3 and S4, first control the first power supply 2 and / or the second power supply 3 to access the working circuit through the pre-charge circuit, and then control the first power supply 2 and / or the second power supply 3 to access the working circuit through the non-resistance circuit; wherein, the resistance of the non-resistance circuit is less than the resistance of the pre-charge circuit. A resistor is provided on the pre-charge circuit, which can prevent the load 11 capacitor from being broken down due to the instantaneous high voltage of the load 11, improving the safety. Define the upper high voltage difference as the allowable value of the voltage difference between the battery voltage and the load 11 capacitor voltage after the pre-charge relay is closed.

[0075] For example, when the vehicle starts, the VCU (vehicle controller) simultaneously detects the voltages of the first power supply 2 and the second power supply 3. If the voltage difference between the two is less than the set value, the first pre-charge relay 7 and the second pre-charge relay 8 can be closed simultaneously. When the upper high voltage difference is met, the first main contactor 9 and the second main contactor 10 can be closed, and then the first pre-charge relay 7 and the second pre-charge relay 8 are disconnected.

[0076] When the vehicle starts, the VCU (vehicle controller) simultaneously detects the voltages of the first power supply 2 and the second power supply 3. If the voltage difference between the two is greater than the set value a, only the first pre-charge relay 7 or the second pre-charge relay 8 is closed. When the upper high voltage difference is met, the first main contactor 9 or the second main contactor 10 can be closed, and then the first pre-charge relay 7 or the second pre-charge relay 8 is disconnected.

[0077] After the vehicle starts, if only one of the first main contactor 9 and the second main contactor 10 is closed, it is divided into the following two cases:

[0078] The first case: The voltage of the first power source 2 is greater than that of the second power source 3. At this time, the first main contactor 9 is in the closed state. As the vehicle travels and discharges, the pressure difference between the two will gradually decrease. When the pressure difference between the two is less than the set value, the second main contactor 10 is closed, and the two power sources can discharge simultaneously.

[0079] The second case: The voltage of the first power source 2 is less than that of the second power source 3. At this time, the second main contactor 10 is in the closed state. As the vehicle travels and discharges, the pressure difference between the two will gradually decrease. When the pressure difference between the two is less than the set value, the first main contactor 9 can be closed, and the two batteries can discharge simultaneously.

[0080] Under the charging condition:

[0081] When the vehicle is charging with the charging gun plugged in, it is divided into the following two cases:

[0082] Before the start of charging, if the pressure difference between the first power source 2 and the second power source 3 is less than the set value, the two power sources can be directly connected in parallel to the charging circuit for charging.

[0083] Before the start of charging, if the pressure difference between the first power source 2 and the second power source 3 is greater than the set value (such as c), it is divided into the following two cases:

[0084] The voltage of the first power source 2 is greater than that of the second power source 3. At this time, the second power source 3 can be charged first. As the vehicle charges, the pressure difference between the two will gradually decrease. When the pressure difference between the two is less than the charging voltage difference, the first power source 2 can be connected in parallel to charge.

[0085] The voltage of the first power source 2 is less than that of the second power source 3. At this time, the first power source 2 can be charged first. As the vehicle charges, the pressure difference between the two will gradually decrease. When the pressure difference between the two is less than the charging voltage difference, the second power source 3 can be connected in parallel to charge.

[0086] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention's solution.

Claims

1. A dual-power vehicle, characterized in that, Comprising: A vehicle body, the vehicle body having a load and a body, a battery base being provided on the body, the battery base including a frame, a guiding body and a locking mechanism, the guiding body being provided on the frame, the locking mechanism being provided on the guiding body, a telescopic groove being provided on the guiding body, the locking mechanism including a plurality of telescopic components, each of the telescopic components being respectively connected to a corresponding guiding body, and the telescopic component being capable of telescopic movement along the telescopic groove; A first power source, the first power source being detachably mounted on the vehicle body; A second power source, the second power source being fixedly mounted on the vehicle body, and the first power source and the second power source being electrically connected to the load through a discharging circuit; Wherein, the locking mechanism has a locked state and a released state. In the locked state, the telescopic component extends out of the telescopic groove and is clamped on the first power source. In the released state, the telescopic component retracts into the telescopic groove, and the first power source is in a de-clamped state.

2. The dual-power vehicle according to claim 1, wherein, The vehicle body includes a vehicle head; The body is connected to the vehicle head; Both the first power source and the second power source are provided on the body.

3. The dual-power vehicle according to claim 2, wherein The first power source and the second power source are respectively arranged on two sides of the body in the height direction.

4. The dual-power vehicle according to claim 2, characterized in that, The vehicle head has front wheels, and the body has rear wheels; The second power source is located between the front wheels and the rear wheels.

5. The dual-power vehicle according to claim 2, characterized in that, Both the first power source and the second power source are provided on one side of the body close to the vehicle head.

6. The dual-power vehicle according to any one of claims 1-5, characterized in that, The discharging circuit includes a main circuit connected to the load, and both the first power source and the second power source are connected in parallel to the main circuit.

7. The dual-power vehicle according to claim 6, wherein The discharging circuit includes a first parallel circuit and a second parallel circuit; The main circuit includes a main positive circuit and a main negative circuit, and the main positive circuit and the main negative circuit are respectively electrically connected to the load of the vehicle body; Both the first parallel circuit and the second parallel circuit are respectively connected to the main positive circuit and the main negative circuit; The first power source is provided in the first parallel circuit, and the second power source is provided in the second parallel circuit.

8. The dual-power vehicle according to claim 7, characterized in that, The first parallel circuit includes a first main circuit and two parallel first branches. Both of the first branches are connected to the first main circuit. The first main circuit and the two first branches are respectively connected to the main positive circuit and the main negative circuit. A first resistor and a first pre-charge relay are provided on one of the first branches, and a first main contactor is provided on the other first branch.

9. The dual-power vehicle according to claim 7 or 8, characterized in that, The second parallel circuit includes a second main circuit and two parallel second branches. Both of the second branches are connected to the second main circuit. The second main circuit and the two second branches are respectively connected to the main positive circuit and the main negative circuit. A second resistor and a second pre-charge relay are provided on one of the second branches, and a second main contactor is provided on the other second branch.

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