High-voltage power distribution PDU (Power distribution Unit) system of hydrogen energy automobile
Technical Field
The utility model relates to a hydrogen energy source car technical field especially relates to a hydrogen energy source car high voltage distribution PDU system.
Background
The PDU is called a high-voltage distribution box unit, and the hydrogen fuel cell automobile needs the PDU to distribute high-voltage electricity provided by the hydrogen reactor and the auxiliary energy to high-voltage devices such as a fuel cell air compressor, a driving motor controller, a steering motor controller, a fuel cell PTC and the like.
A model of a hydrogen fuel cell vehicle with the code NVE1 adopts a rear-end drive mode, a driving motor, a motor controller and auxiliary energy sources such as a power battery and a super capacitor are all arranged near a rear axle of the vehicle, and high-voltage devices such as a hydrogen reactor and accessories thereof, a steering motor controller, a fuel cell PTC and the like are arranged in a cabin. And the wheelbase of the whole vehicle is 3665mm, the length of the whole vehicle is 4995mm, according to the traditional arrangement mode, no matter the PDU is arranged in the cabin or at a certain position of the lower vehicle body, a long and large number of high-voltage wire harnesses penetrate through the cabin to the rear axle, and meanwhile, the high-voltage platform of the vehicle is at 576V. Too much excess wire harness will lead to the following problems:
the variable high-voltage current in the high-voltage wire bundle can generate an electromagnetic field, so that the electromagnetic compatibility of the whole vehicle is at risk, and vehicle control signals can be influenced in serious cases, a control system of a vehicle-mounted computer is interfered, and even safety accidents such as traffic accidents are caused;
because the whole vehicle high-voltage platform is at 576V high voltage, the high-voltage wire harness is too long, the risk of electric leakage exists, the high-voltage electric leakage has direct harm to personal safety, and if the high-voltage electric leakage and water passing condition occurs, the immeasurable loss can be caused;
the cost is too high, and the wire diameter of high-pressure pencil is thick, and the pencil safety rating requires highly, and too much high-pressure pencil can cause too big cost pressure, and high cost will reduce whole car market competition.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrogen energy source car high voltage distribution PDU system that divides PDU into two to the above-mentioned not enough of prior art.
The utility model discloses a hydrogen energy source car high voltage distribution PDU system, including first high voltage distribution unit and second high voltage distribution unit, first high voltage distribution unit arranges in the cabin, first high voltage distribution unit is connected with fuel cell and the first high voltage electric device electricity in the cabin respectively, still be equipped with the pre-charge interface on the first high voltage distribution unit; the second high-voltage power distribution unit is arranged on one side of the driving motor, the second high-voltage power distribution unit is electrically connected with the fuel cell, the auxiliary energy source and a second high-voltage electric device, a pre-charging output port is arranged on the second high-voltage power distribution unit, and the pre-charging output port is electrically connected with the pre-charging interface through a high-voltage wire harness; the fuel cell is electrically connected to the first and second high voltage power distribution units via a fuel cell DCDC.
Further, the first high-voltage electric device comprises a steering motor controller, a fuel cell PTC and a fuel cell air compressor.
Further, the second high-voltage electric device comprises a driving motor controller and an air conditioner.
Further, the auxiliary energy source comprises a power battery and a super capacitor.
Further, the power battery is a high-voltage lithium battery.
Further, the super capacitor is electrically connected with the second high-voltage distribution unit through a super capacitor DCDC.
Further, the first high-voltage power distribution unit is electrically connected with the low-voltage storage battery.
The utility model provides a hydrogen energy source car high voltage distribution PDU system is when whole car work, at first the electric current that fuel cell produced inputs the second high voltage distribution unit after fuel cell DCDC steps up, at this moment, the electric current that gets into the second high voltage distribution unit produces the precharge flow after pre-charging resistance and flows out from the pre-charging delivery outlet, and flow to the pre-charging interface of first high voltage distribution unit through high-voltage wire harness, carry out the pre-charging for first high voltage distribution unit, after the pre-charging is accomplished, the electric energy that fuel cell and auxiliary energy provided gets into first high voltage distribution unit and second high voltage distribution unit, high voltage distribution PDU system begins normal work, distribute the electricity for first high voltage electric device and second high voltage electric device according to whole car control signal, make whole car normal operating.
The utility model discloses a hydrogen energy source car high voltage distribution PDU system is guaranteeing under the condition that the PDU function was accomplished, innovative is divided into two with high voltage distribution PDU system, divide into first high voltage distribution unit and second high voltage distribution unit, first high voltage distribution unit arranges in the cabin, satisfy the distribution demand of the first high voltage electrical part in the cabin, second high voltage distribution unit arranges near driving motor, satisfy the distribution demand of the second high voltage electrical part near rear axle, and only need a high voltage pencil between first high voltage distribution unit and the second high voltage distribution unit as the connection of pre-charge pencil can, reduce the high voltage pencil, do not influence vehicle control signal, do not disturb the control system of on-vehicle computer, reduce the risk of electric leakage, and therefore, the carrier wave energy source reduces the cost, and reduces the market competitiveness of the whole car.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage power distribution PDU system of a hydrogen energy vehicle.
1. A first high voltage power distribution unit; 11. a pre-charging interface; 2. a second high voltage power distribution unit; 21. a pre-charging output port; 3. a fuel cell; 4. a first high-voltage electric device; 41. a steering motor controller; 42. a fuel cell PTC; 43. a fuel cell air compressor; 5. an auxiliary energy source; 51. a power battery; 52. a super capacitor; 53. a super capacitor DCDC; 6. a second high-voltage electric device; 61. a drive motor controller; 62. an air conditioner; 7. a high voltage wire harness; 8. a fuel cell DCDC; 9. and a low-voltage storage battery.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the utility model discloses a high-voltage power distribution unit PDU system of hydrogen energy source car, including first high-voltage power distribution unit 1 and second high-voltage power distribution unit 2, first high-voltage power distribution unit 1 arranges in the cabin, and first high-voltage power distribution unit 1 is connected with fuel cell 3 and the first high-voltage electric device 4 electricity in the cabin respectively, still is equipped with pre-charging interface 11 on the first high-voltage power distribution unit 1; the second high-voltage power distribution unit 2 is arranged on one side of the driving motor, the second high-voltage power distribution unit 2 is electrically connected with the fuel cell 3, the auxiliary energy 5 and the second high-voltage electric device 6, a pre-charging output port 21 is arranged on the high-voltage power distribution unit, and the pre-charging output port 21 is electrically connected with the pre-charging interface 11 through a high-voltage wiring harness 7; the fuel cell 3 is electrically connected with the first high-voltage distribution unit 1 and the second high-voltage distribution unit 2 through a fuel cell DCDC8
The utility model discloses a hydrogen energy source car high voltage distribution PDU system is guaranteeing under the condition that the PDU function was accomplished, innovative is divided into two with high voltage distribution PDU system, divide into first high voltage distribution unit 1 and second high voltage distribution unit 2, first high voltage distribution unit 1 arranges in the cabin, satisfy the distribution demand of the high voltage electrical part in the cabin, second high voltage distribution unit 2 arranges near driving motor, satisfy near the rear axle high voltage electrical part's distribution demand, and only need a high voltage wiring harness 7 between first high voltage distribution unit 1 and the second high voltage distribution unit 2 as the connection of pre-charge pencil can, reduce high voltage wiring harness 7, do not influence vehicle control signal, do not disturb the control system of on-vehicle computer, reduce the risk of electric leakage, therefore, the product cost is reduced, the market competitiveness of the whole car is reduced.
A hydrogen energy automobile high-voltage power distribution PDU system is mainly applied to automobiles such as electric automobiles and hydrogen fuel cell 3 automobiles and the like with high-voltage electric equipment, and has the main function of carrying out power distribution of each high-voltage electric equipment according to a control signal of the whole automobile, the PDU on the hydrogen fuel cell 3 automobile needs to receive high voltage electricity generated by a hydrogen reactor and an auxiliary energy source 5 and distributes the high voltage electricity to the high-voltage electric equipment such as a motor controller, a steering motor controller 41, a fuel cell PTC42 and the like according to the control signal of the whole automobile so as to meet the normal operation of the whole automobile; the high-voltage power distribution PDU system of the hydrogen energy automobile comprises a first high-voltage power distribution unit 1 and a second high-voltage power distribution unit 2. The first high-voltage distribution unit 1 is arranged in the cabin, the input end of the first high-voltage distribution unit is a high-voltage current and pre-charging interface 11 provided by the hydrogen reactor, the output end of the first high-voltage distribution unit is a first high-voltage electric device 4, the first high-voltage electric device 4 can be a steering motor controller 41, a fuel cell PTC42, a fuel cell air compressor 43 and the like, and the first high-voltage distribution unit 1 distributes power to the first high-voltage electric device 4 at the output end according to the requirement of the whole vehicle so as to enable the first high-voltage electric device to work normally. The second high-voltage power distribution unit 2 is arranged near the driving motor, the input ends of the second high-voltage power distribution unit are auxiliary energy 5 such as a fuel cell 3, a power cell 51 and a super capacitor 52, the output ends of the second high-voltage power distribution unit are second high-voltage electric devices 6, the second high-voltage electric devices 6 can be a motor controller, an air conditioner 62 and the like, and the second high-voltage power distribution unit 2 distributes power to the high-voltage electric devices at the output ends according to the requirements of the whole vehicle so as to enable the high-voltage electric devices to work normally; the power battery 51 may be a high voltage lithium battery. The supercapacitor 52 is electrically connected to the second high voltage distribution unit 2 via a supercapacitor DCDC 53.
The first high-voltage power distribution unit 1 is electrically connected to the low-voltage battery 9 and charges the low-voltage battery.
A hydrogen energy source car high voltage distribution PDU system is when whole car work, at first the electric current that fuel cell 3 produced inputs second high voltage distribution unit 2 after fuel cell DCDC8 steps up, at this moment, the electric current that gets into second high voltage distribution unit 2 produces the precharge flow after the pre-charge resistance and flows out from precharging delivery outlet 21, and flow to precharging interface 11 of first high voltage distribution unit 1 through the high-voltage line, carry out the preliminary charge for first high voltage distribution unit 1, after the preliminary charge is accomplished, the electric energy that fuel cell 3 and auxiliary energy 5 provided gets into first high voltage distribution unit 1 and second high voltage distribution unit 2, high voltage distribution PDU system begins normal work, give different high voltage electrical parts according to whole car control signal and move the distribution, make whole car can normal operating.
The above is not relevant and is applicable to the prior art.
Although certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention, which is to be construed as broadly as the present invention will suggest themselves to those skilled in the art to which the invention pertains and which is susceptible to various modifications or additions and similar arrangements to the specific embodiments described herein without departing from the scope of the invention as defined in the appended claims. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of the present invention.