A high-voltage safety system for fuel cell hydrogen-powered vehicles

Abstract

The present invention relates to the technical field of hydrogen energy vehicles, and in particular to a high-voltage safety system for fuel cell hydrogen energy vehicles. The high-voltage safety system includes a front cabin high-voltage distribution box, a rear cabin high-voltage distribution box, a fuel cell stack, a fuel cell air compressor controller, a fuel cell PTC, a heater PTC, an air conditioning compressor, an electronically controlled hydraulic power steering, a power battery, a drive motor controller, a bidirectional DC / DC, a super capacitor, a drive motor and a fuel cell air compressor, wherein the super capacitor, the bidirectional DC / DC, the drive motor controller, the power battery, the front cabin high-voltage distribution box, the electronically controlled hydraulic power steering, the heater PTC, the air conditioning compressor, the fuel cell PTC, the fuel cell air compressor controller and the fuel cell stack are sequentially connected in series with a loop interlocking harness to form a high-voltage interlocking circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy vehicles, and in particular to a high-voltage safety system for fuel cell hydrogen energy vehicles. Background Art

[0002] Currently, the high-voltage system power distribution of pure electric vehicles generally adopts a single PDU design. However, since the power system structure of hydrogen vehicles is different from that of pure electric vehicles, high-voltage leakage is likely to occur without a good high-voltage safety strategy. Summary of the invention

[0003] In view of this, the present invention provides a high-voltage safety system for a fuel cell hydrogen-powered vehicle.

[0004] The present invention provides a high-voltage safety system for a fuel cell hydrogen energy vehicle, comprising a front cabin high-voltage distribution box, a rear cabin high-voltage distribution box, a fuel cell stack, a fuel cell air compressor controller, a fuel cell PTC, a heater PTC, an air conditioning compressor, an electronically controlled hydraulic power steering, a power battery, a drive motor controller, a bidirectional DC / DC, a super capacitor, a drive motor and a fuel cell air compressor. A boost DC / DC is integrated in the front cabin high-voltage distribution box, and the positive and negative electrodes of the boost DC / DC are respectively electrically connected to the positive and negative electrodes of the fuel cell stack. The rear cabin high-voltage distribution box, the fuel cell air compressor controller, the fuel cell PTC, the air conditioning compressor, the heater PTC and the electronically controlled hydraulic power steering are all connected to the front cabin high-voltage distribution box through a high-voltage wiring harness. The positive and negative electrodes of the box are electrically connected, the power battery, the drive motor controller and the bidirectional DC / DC are electrically connected to the positive and negative electrodes of the rear cabin high-voltage distribution box through a high-voltage wire harness respectively, the supercapacitor is electrically connected to the bidirectional DC / DC through a high-voltage wire harness, the drive motor is electrically connected to the drive motor controller, and the fuel cell air compressor is electrically connected to the fuel cell air compressor controller, the supercapacitor, the bidirectional DC / DC, the drive motor controller, the power battery, the front cabin high-voltage distribution box, the electronically controlled hydraulic power steering, the warm air PTC, the air-conditioning compressor, the fuel cell PTC, the fuel cell air compressor controller and the fuel cell stack are connected in series with a loop interlocking wire harness in sequence to form a high-voltage interlocking loop.

[0005] Furthermore, it also includes a high-voltage relay, a 12V battery and a collision switch connected in series in sequence, one end of the high-voltage relay is electrically connected to the negative pole of the front cabin high-voltage distribution box, and the other end is electrically connected to the negative pole of the fuel cell stack. A DC converter DCL is integrated in the front cabin high-voltage distribution box, and the 12V battery is electrically connected to the DC converter.

[0006] Furthermore, the front cabin high-voltage distribution box is provided with a first cover-opening protection switch, and the rear cabin high-voltage distribution box is provided with a second cover-opening protection switch, and the first cover-opening protection switch and the second cover-opening protection switch are both arranged on the high-voltage interlocking circuit.

[0007] The technical solution provided by the present invention has the following beneficial effects: the high-voltage safety system for a fuel cell hydrogen-powered vehicle of the present invention realizes the overall optimized design of the high-voltage system, can reduce the number and length of high-voltage wiring harnesses, effectively reduce costs, and is conducive to achieving a simple and orderly overall layout. The high-voltage circuit of the system is highly safe and not prone to leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a connection diagram of a high-voltage safety system for a fuel cell hydrogen energy vehicle according to the present invention. DETAILED DESCRIPTION

[0009] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0010] Please refer to Figure 1The embodiment of the present invention provides a high-voltage safety system for a fuel cell hydrogen energy vehicle, including a front cabin high-voltage distribution box 10, a rear cabin high-voltage distribution box 20, a fuel cell stack 30, a fuel cell air compressor controller 40, a fuel cell PTC 50, a heater PTC 60, an air conditioning compressor 70, an electronically controlled hydraulic power steering 80, a power battery 90, a drive motor controller 100, a bidirectional DC / DC 110, a super capacitor 120, a drive motor 130 and a fuel cell air compressor 140. The front cabin high-voltage distribution box 10 is integrated with a boost DC / DC 11, and the positive and negative electrodes of the boost DC / DC 11 are respectively electrically connected to the positive and negative electrodes of the fuel cell stack 30. The rear cabin high-voltage distribution box 20, the fuel cell air compressor controller 40, the fuel cell PTC 50, the air conditioning compressor 70, the heater PTC 60 and the electronically controlled hydraulic power steering 80 are all connected to the front cabin high-voltage distribution box through a high-voltage wiring harness. The positive and negative electrodes of the electric box 10 are electrically connected, the power battery 90, the drive motor controller 100 and the bidirectional DC / DC 110 are respectively electrically connected to the positive and negative electrodes of the rear cabin high-voltage distribution box 20 through a high-voltage wiring harness, the supercapacitor 120 is electrically connected to the bidirectional DC / DC 110 through a high-voltage wiring harness, the drive motor 130 is electrically connected to the drive motor controller 100, the fuel cell air compressor 140 is electrically connected to the fuel cell air compressor controller 40, the supercapacitor 120, the bidirectional DC / DC 110, the drive motor controller 100, the power battery 90, the front cabin high-voltage distribution box 10, the electronically controlled hydraulic power steering gear 80, the heater PTC 60, the air conditioning compressor 70, the fuel cell PTC 50, the fuel cell air compressor controller 40 and the fuel cell stack 30 are sequentially connected in series with a loop interlocking harness to form a high-voltage interlocking circuit 200.

[0011] In the present invention, the front cabin high-voltage distribution box 10 is arranged in the front cabin, the rear cabin high-voltage distribution box 20 is arranged at the rear axle of the whole vehicle, and the boost DC / DC 11 is integrated and arranged in the front cabin high-voltage distribution box 10. Specifically, the boost DC / DC 11 is connected to the power interface in the front cabin high-voltage distribution box 10, and the front cabin high-voltage distribution box 10 is respectively provided with high-voltage connectors 12 which are arranged one by one corresponding to the fuel cell stack 30, the rear cabin high-voltage distribution box 20, the fuel cell air compressor controller 40, the fuel cell PTC 50, the air-conditioning compressor 70, the heater PTC 60 and the electronically controlled hydraulic power steering 80, so as to realize the fuel cell air compressor 140, the fuel cell PTC 50, the electronically controlled hydraulic power steering The power distribution needs of the controller 80, the air-conditioning compressor 70 and the heater PTC 60 are met, and the DC output is raised and lowered to the rear cabin high-voltage distribution box 20. The rear cabin high-voltage distribution box 20 is also provided with high-voltage connectors 12 corresponding to the power battery 90, the drive motor controller 100 and the bidirectional DC / DC 110, which are used to distribute power to the power battery 90, the supercapacitor 120 and the drive motor 130, realizing the overall optimized design of the high-voltage system, which can reduce the number and length of the high-voltage wiring harness, effectively reduce the cost, and at the same time is conducive to achieving a simple and orderly overall layout.

[0012] In the above embodiment, it also includes a high-voltage relay 160, a 12V battery 170 and a collision switch 180 connected in series in sequence, one end of the high-voltage relay 160 is electrically connected to the negative electrode of the front cabin high-voltage distribution box 10, and the other end is electrically connected to the negative electrode of the fuel cell stack 30. A DC converter DCL15 is integrated in the front cabin high-voltage distribution box 10, and the 12V battery 170 is electrically connected to the DC converter 15.

[0013] In the invention, the DCL is integrated in the front cabin high voltage distribution box 10 and connected to the power interface of the front cabin high voltage distribution box 10. The 12V battery 170 is used to supply power to the collision switch 180, and the DCL is used to distribute power to the 12V battery 170 to ensure power distribution safety.

[0014] In the above embodiment, the front cabin high-voltage distribution box 10 is provided with a first cover opening protection switch 14, and the rear cabin high-voltage distribution box 20 is provided with a second cover opening protection switch 21, and the first cover opening protection switch 14 and the second cover opening protection switch 21 are both arranged on the high-voltage interlocking circuit 200.

[0015] In the present invention, the first cover-opening protection switch 14 and the second cover-opening protection switch 21 function to disconnect the high-voltage interlocking circuit 200 to cut off the high voltage.

[0016] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0017] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0018] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage safety system for a fuel cell hydrogen-powered vehicle, characterized in that: The invention comprises a front cabin high-voltage distribution box (10), a rear cabin high-voltage distribution box (20), a fuel cell stack (30), a fuel cell air compressor controller (40), a fuel cell PTC (50), a heater PTC (60), an air conditioning compressor (70), an electronically controlled hydraulic power steering device (80), a power battery (90), a drive motor controller (100), a bidirectional DC / DC (110), a super capacitor (120), a drive motor (130) and a fuel cell air compressor (140), wherein the front cabin high-voltage A boost DC / DC (11) is integrated in the distribution box (10), the positive and negative electrodes of the boost DC / DC (11) are electrically connected to the positive and negative electrodes of the fuel cell stack (30) respectively, and the rear cabin high-voltage distribution box (20), the fuel cell air compressor controller (40), the fuel cell PTC (50), the air conditioning compressor (70), the heater PTC (60) and the electronically controlled hydraulic power steering (80) are all electrically connected to the positive and negative electrodes of the front cabin high-voltage distribution box (10) through a high-voltage wiring harness. The power battery (90), the drive motor controller (100) and the bidirectional DC / DC (110) are respectively electrically connected to the positive and negative electrodes of the rear cabin high-voltage distribution box (20) through a high-voltage wire harness, the super capacitor (120) is electrically connected to the bidirectional DC / DC (110) through a high-voltage wire harness, the drive motor (130) is electrically connected to the drive motor controller (100), the fuel cell air compressor (140) is electrically connected to the fuel cell air compressor controller (40), and the super capacitor (120), the bidirectional DC / DC (110), the drive motor controller (100), the power battery (90), the front cabin high-voltage distribution box (10), the electronically controlled hydraulic power steering (80), the warm air PTC (60), the air conditioning compressor (70), the fuel cell PTC (50), the fuel cell air compressor controller (40) and the fuel cell stack (30) are sequentially connected in series using a loop interlocking wire harness to form a high-voltage interlocking circuit (200); It also includes a high-voltage relay (160), a 12V storage battery (170) and a collision switch (180) which are sequentially connected in series, one end of the high-voltage relay (160) being electrically connected to the negative electrode of the front cabin high-voltage distribution box (10), and the other end of the high-voltage relay (160) being electrically connected to the negative electrode of the fuel cell stack (30), a direct current converter DCL (15) being integrated in the front cabin high-voltage distribution box (10), and the 12V storage battery (170) being electrically connected to the direct current converter DCL (15); The front cabin high-voltage distribution box (10) is provided with a first cover-opening protection switch (14), and the rear cabin high-voltage distribution box (20) is provided with a second cover-opening protection switch (21), and the first cover-opening protection switch (14) and the second cover-opening protection switch (21) are both arranged on the high-voltage interlocking circuit (200).

Images