CN214728205U

CN214728205U - High-voltage distribution box for hydrogen fuel cell passenger car

Info

Publication number: CN214728205U
Application number: CN202120234819.XU
Authority: CN
Inventors: 卢明军
Original assignee: Chery and Wanda Guizhou Bus Co Ltd
Current assignee: Chery and Wanda Guizhou Bus Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-11-16
Anticipated expiration: 2031-01-28

Abstract

The utility model discloses a hydrogen fuel cell is high voltage distribution box for passenger train, it includes box body and lid, the lid sets up on the box body, is connected with the joint that charges on the lateral wall of box body, is connected with input joint and discharge joint on the box body antetheca respectively, is equipped with copper bar one, copper bar two and copper bar three in the box body respectively, copper bar three respectively with charge the joint with input joint and discharge joint connect, the joint and the fuse charge are connected at copper bar one both ends, the fuse pass through copper bar two respectively with input joint and discharge joint connect. The device can effectively carry out the effective connection with fuel cell system, lithium iron phosphate power battery system and whole car power assembly controller three's high-voltage loop to rationally use and distribute the electric energy that produces fuel cell chemical reaction, lithium iron phosphate power battery electric energy and the electric energy of retrieving during service braking, promote fuel cell passenger train driving safety, stability and reliability, better reduction fuel cell passenger train product cost simultaneously.

Description

High-voltage distribution box for hydrogen fuel cell passenger car

Technical Field

The utility model relates to a block terminal especially relates to a hydrogen fuel cell is high voltage distribution box for passenger train, belongs to hydrogen fuel cell passenger train equipment technical field.

Background

The fuel cell passenger car takes hydrogen as fuel, and generates electric energy to drive the motor to work through the oxidation-reduction chemical reaction between the carried fuel cell engine and oxygen in the atmosphere, and then the motor drives a mechanical transmission device in the car to drive the electric car to move forward. The fuel cell bus has the advantages of high energy conversion efficiency, environmental friendliness, long driving range, short hydrogenation time, capability of combining the advantages of a traditional automobile and a pure electric automobile, and wide application prospect in the future new energy bus industry.

The fuel cell system mainly includes: a fuel cell stack, a fuel cell controller (FCU), an air subsystem, a hydrogen subsystem, and a cooling subsystem. The fuel cell stack and each subsystem are coordinated and reasonably operated under the control of the fuel cell controller, and the output of required power is ensured. However, the actual operation conditions of the automobile are very complex, and the basic conditions can be divided into starting, accelerating, climbing, overtaking, descending long slope deceleration braking, parking, backing and the like. The power source of the fuel cell passenger car consists of a fuel cell engine system and a lithium iron phosphate power cell, and the flow directions of energy are different under different working conditions, so that the parts of the power system can work uniformly and efficiently by switching among the working conditions. Firstly, analyzing the intention of a driver, determining the current working mode of the vehicle, and comprehensively considering various factors and energy distribution under the condition of ensuring the dynamic property. According to the energy supply mode, the working modes which can be realized by the vehicle are a pure electric driving mode, a charging mode, a double-source driving mode and a regenerative braking mode. The power transmission of each working mode is realized through a high-voltage loop of the whole vehicle. Therefore, a safe, reliable and stable high-voltage distribution box is needed to reliably connect the power battery loop of the vehicle, the high-voltage output loop of the hydrogen fuel battery and the high-voltage component controller loop of the whole vehicle, so as to realize the normal operation of each mode of the vehicle and realize the reasonable transmission of energy. The existing scheme in the industry is generally to integrate the fuel cell voltage boosting DCDC with the power distribution function, but the product cost is higher, and the faults have mutual influence and influence the vehicle reliability, so an external independent high-voltage distribution box is urgently needed to effectively connect a vehicle power battery loop, a hydrogen fuel cell high-voltage output loop and a whole vehicle high-voltage component controller, so that the energy is flexibly transmitted and the modes are flexibly switched, and the driving and energy recovery efficiency of a fuel cell passenger car is improved.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the utility model provides a hydrogen fuel cell is high voltage distribution box for passenger train, the device can effectively carry out the effective connection with fuel cell system, lithium iron phosphate power battery system and whole car power assembly controller three's high-voltage loop, thereby with the electric energy that fuel cell chemical reaction produced, the electric energy of retrieving when lithium iron phosphate power battery electric energy and service braking carries out rational use and distribution, promote fuel cell passenger train driving safety, stability and reliability, simultaneously better reduction fuel cell passenger train product cost, the effectual problem of having solved the aforesaid existence.

The technical scheme of the utility model is that: the utility model provides a hydrogen fuel cell is high voltage distribution box for passenger train, it includes box body and lid, the lid sets up on the box body, is connected with the joint that charges on the lateral wall of box body, is connected with input joint and discharge joint on the box body antetheca respectively, is equipped with copper bar one, copper bar two and copper bar three in the box body respectively, copper bar three respectively with charge joint and input joint and discharge joint connection, the joint and the fuse charge are connected at copper bar one both ends, the fuse passes through copper bar two respectively with input joint and discharge joint connection.

The utility model has the advantages that: compared with the prior art, adopt the technical scheme of the utility model, the device can effectively carry out effective connection with fuel cell system, lithium iron phosphate power battery system and whole car power assembly controller three's high-pressure return circuit to the electric energy that produces fuel cell chemical reaction, the electric energy of retrieving when lithium iron phosphate power battery electric energy and service braking carries out rational use and distribution, promote fuel cell passenger train driving safety, stability and reliability, better reduction fuel cell passenger train product cost simultaneously, fine result of use has been gained.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a block diagram of the system for connecting the present invention to a vehicle;

FIG. 4 is an electrical schematic diagram of the high voltage connection to the vehicle of the present invention;

FIG. 5 is a schematic diagram of a pure electric driving mode of the present invention;

fig. 6 is a schematic diagram of a charging mode of the present invention;

FIG. 7 is a schematic diagram of the dual source driving mode of the present invention;

fig. 8 is a schematic diagram of the regenerative braking mode of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1: as shown in the attached drawings 1-2, a high voltage distribution box for a hydrogen fuel cell bus comprises a box body 4 and a box cover 5, the box cover 5 is arranged on the box body 4, a charging connector 1 is connected to the side wall of the box body 4, an input connector 2 and a discharging connector 3 are connected to the front wall of the box body 4 respectively, a first copper bar 6, a second copper bar 8 and a third copper bar 9 are arranged in the box body 4 respectively, the third copper bar 9 is connected with the charging connector 1, the input connector 2 and the discharging connector 3 respectively, the charging connector 1 and the fuse 7 are connected to the two ends of the first copper bar 6, and the fuse 7 is connected with the input connector 2 and the discharging connector 3 respectively through the second copper bar 8.

1. The device has the following electrical performance parameters:

maximum current (A)	180A
		Voltage range (V)	400-750
Insulation resistance (ohm)	≥50M(1000V)
		DC withstand voltage	DC2000V (leakage current is less than or equal to 10mA, no breakdown or flashover phenomenon)
Temperature range of working environment	-40℃～85℃
		Humidity	The product does not dew in the relative humidity of 5-95% in the working environment;
protection class	IP67
		Physical dimension of component body (length. times. width. times. height) (mm)	21015595

2. Description of port electrical interface of the device:

3. description of the function

As shown in the attached figures 3-4, the input + and input-ports of the device are respectively connected with a discharging positive interface and a discharging negative interface of a power battery high-voltage box; the charging positive port and the charging negative port are respectively connected with a hydrogen stack boosting DCDC charging positive interface and a charging negative interface; the discharging positive port and the discharging negative port are respectively connected with the input positive interface and the input negative interface of the all-in-one controller. Wherein, a 200A fuse is arranged on the charging positive circuit to protect the hydrogen stack boosting DCDC overcharge condition. Through the whole vehicle control strategy, the following functional modes can be realized (the single-line arrow represents the connection relation of the high-voltage wire harness, and the hollow arrow represents the electric energy transmission direction):

the first mode is as follows: pure electric drive, as shown in fig. 5, when the vehicle Ready is high in SOC, the lithium iron phosphate power battery system is used as the only power source to drive the motor, so as to drive the vehicle to run.

And a second mode: in the charging mode, as shown in fig. 6, the vehicle Ready has a low SOC, and at this time, if the fuel cell meets the power requirement of the driving motor, the fuel cell is used as a power source to drive the driving motor, and the surplus current can be used for charging the power cell.

And a third mode: in the dual-source driving mode, as shown in fig. 7, the vehicle Ready has a low SOC, and at this time, if the fuel cell cannot meet the power requirement of the driving motor, the fuel cell and the power cell are used together as the power source to drive the driving motor.

And a fourth mode: in the regenerative braking mode, as shown in fig. 8, when the vehicle is running at a certain speed, the accelerator pedal is released to perform coasting energy recovery, or the brake pedal is pressed to perform braking energy recovery, so as to drive the motor to generate power to charge the power battery.

The utility model has the advantages that:

1. the external independent design is adopted, so that the arrangement is convenient and the maintenance is convenient;

2. the design cost is low, and the cost of the whole vehicle can be effectively reduced;

the device can effectively carry out the effective connection with fuel cell system, lithium iron phosphate power battery system and whole car power assembly controller three's high-voltage loop to rationally use and distribute the electric energy that produces fuel cell chemical reaction, lithium iron phosphate power battery electric energy and the electric energy of retrieving during service braking, promote fuel cell passenger train driving safety, stability and reliability, better reduction fuel cell passenger train product cost has simultaneously obtained fine result of use.

The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a hydrogen fuel cell is high voltage distribution box for passenger train, it includes box body (4) and lid (5), its characterized in that: lid (5) set up on box body (4), are connected with the joint (1) that charges on the lateral wall of box body (4), are connected with input joint (2) and discharge joint (3) respectively on box body (4) antetheca, are equipped with copper bar one (6), copper bar two (8) and copper bar three (9) respectively in box body (4), copper bar three (9) are connected with joint (1) and input joint (2) and discharge joint (3) that charge respectively, and the joint (1) and fuse (7) charge are connected to copper bar one (6) both ends, fuse (7) are connected with input joint (2) and discharge joint (3) respectively through copper bar two (8).