CN217347716U

CN217347716U - Low-voltage power distribution device of fuel cell system

Info

Publication number: CN217347716U
Application number: CN202221931328.1U
Authority: CN
Inventors: 郭彪; 袁家宏; 汪飞杰; 谷军
Original assignee: Henan Yuqing Power Co ltd
Current assignee: Henan Yuqing Power Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-09-02
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a low-voltage distribution device of a fuel cell system, which comprises a base, a cover, a bending plate and a contact pin, wherein the upper surface of the base is provided with a hole site, the contact pin is installed in the hole site, the rear end of the contact pin is connected with an upper sealing plug I in a pressing way for sealing the rear end, the side surface of the base is provided with a limiting groove, a clamping block is arranged between the limiting grooves, a fixed hole II is arranged on the bending plate, the bending plate is inserted into the limiting groove, the clamping block is clamped in the fixed hole II, the bending part on the bending plate is provided with a fixed hole I, a gasket is installed around the upper surface of the base, the cover is installed on the base, the sealing plug II is arranged on the hole site where the contact pin is not installed, and the contact pin is provided with a relay, a fuse and a diode; the utility model has the advantages of reasonable design, simple to operate is nimble, and is sealed effectual, prevents that external water and dust from entering into the box, and overall structure designs compactly, can effectually reduce low voltage distribution device's volume.

Description

Low-voltage power distribution device of fuel cell system

Technical Field

The utility model relates to a fuel cell system technical field specifically is a fuel cell system low pressure distribution device.

Background

The fuel cell system is a novel high-efficiency clean power generation device without carbon emission, and has the advantages of high efficiency, small environmental pollution, high specific energy, low noise, wide fuel range and the like; in recent years, the attention on clean energy is continuously enhanced in China, and a fuel cell system is gradually demonstrated, applied and popularized in the fields of automobiles, ships, forklifts, fixed power generation, combined heat and power supply and the like.

The operation of a fuel cell system requires that hydrogen and air reach certain conditions, the temperature and pressure of a hydrogen path, an air path and a cooling path are monitored in real time in order to meet the operation conditions of the system, the reaction conditions of the hydrogen and the air are met by the operation of electromagnetic valves, air compressors, thermostats, throttles, water pumps, fans, DC/DC and other electrical components in the system, and an external power distribution device is required to control and protect the electrical components and the sensors in order to ensure the normal and safe operation of the electrical components and the sensors.

The existing low-voltage power distribution scheme of the fuel cell system comprises the following steps: using a low-voltage distribution box of an automobile, using a low-voltage distribution box developed in a semi-customized manner and performing plastic mold opening; the low-voltage distribution box in the scheme has the following defects of 1, inconvenient installation on a fuel cell system body, poor flexibility, poor sealing effect and inconvenient connection of the box cover, and 3, the low-voltage distribution box which is developed by using semi-customization has the defects of high cost, long development period and poor universality because the internal distribution modules occupy too much space of the fuel cell system. There is therefore a great need in the market for improved techniques to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a fuel cell system low pressure distribution device, structural design is reasonable, simple to operate is nimble, and is sealed effectual, prevents that external water and dust from entering into the box in, overall structure design is compact, can effectually reduce low pressure distribution device's volume, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fuel cell system low pressure distribution device, includes base, lid, the board of bending, contact pin, the upper surface of base is provided with the hole site, installs the contact pin in the hole site, and the sealing plug I is used for the sealed of rear end on the contact pin rear end crimping, the side of base is provided with the spacing groove, is provided with the fixture block between the spacing groove, be provided with fixed orifices II on the board of bending, the board of bending inserts the spacing inslot, and the fixture block card is in fixed orifices II, the position of bending on the board of bending is provided with fixed orifices I, install the packing ring around the base upper surface, the lid is installed on the base.

Furthermore, a sealing plug II is arranged on a hole position where the contact pin is not installed.

Further, still include relay, fuse, diode, relay, fuse, diode are installed respectively on the contact pin.

Further, the side of lid is provided with the buckle, be provided with the plastic lock that corresponds with the buckle on the side of base, the buckle inserts and realizes being connected of lid and base in the plastic lock, stirs the plectrum of plastic lock and makes the lid lock to the base on, and the design of locking can prevent to make lid and base break away from when the vibration, simultaneously, can convenient and fast unpack apart when the lid is unpacked apart to needs and maintain the inspection.

Furthermore, the number of the hole sites on the base is selected according to the control and protection number of the low-voltage electrical system of the rear-end fuel cell.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses on set up the board of bending, fixed the fuel cell system to the relay box through the board of bending, make it be difficult to separately at the vibration in-process, this kind of design can make the mounted position and the mode of relay diversified, the mounted position of design relay box that can be nimble, the low pressure electrical development of the fuel cell system of being convenient for.

2. The utility model discloses on set up the packing ring, prevent through packing ring and sealing plug that external water and dust from making it reach IP 67's protection level in getting into the relay, solved water and dust to the corrosion problems of parts such as relay, fuse, diode and connector, prevent that steam from leading to the problem of short circuit, through the fixture block card in fixed orifices II, make the board of bending and meet with the base, the spacing groove restricts the base, makes it fixed firm.

3. The utility model has the advantages of reasonable design, simple to operate is nimble, and is sealed effectual, prevents that external water and dust from entering into the box, and overall structure designs compactly, can effectually reduce low voltage distribution device's volume.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention;

FIG. 2 is a schematic view of the assembly structure of the present invention;

fig. 3 is a schematic view of the front view structure of the present invention.

In the figure: 001 fixed orifices I, 002 fixed orifices II, 003 fixture block, 004 base, 005 relay, 006 lid, 007 buckle, 008 fuse, 009 diode, 010 plastic lock, 011 contact pin, 012 sealing plug I, sealing plug 013 II, 014 packing ring, 015 board of bending, 016 hole site, 017 spacing groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a low-voltage power distribution device of a fuel cell system comprises a base 004, a cover 006, a bending plate 015 and pins 011, wherein hole sites 016 are arranged on the upper surface of the base 004, the number of the hole sites 016 on the base 004 is selected according to the control and protection number of a rear-end fuel cell low-voltage electrical system, the pins 011 are installed in the hole sites 016, the rear ends of the pins 011 are connected with sealing plugs I012 in a pressing mode for sealing the rear ends, sealing plugs II 013 are arranged on the hole sites 016 without the pins 011, relays 005, fuses 008 and diodes 009 are respectively installed on the pins 011, limiting grooves 017 are arranged on the side surfaces of the base 004, clamping blocks 003 are arranged among the limiting grooves 017, fixing holes II 002 are arranged on the bending plate 015, the bending plate 015 is inserted into the limiting grooves 017, the clamping blocks 003 are clamped in the fixing holes II 002, fixing holes I001 are arranged at the bending positions on the bending plate 015, gaskets 014 are installed around the upper surface of the base 004, cover 006 installs on base 004, and the side of cover 006 is provided with buckle 007, is provided with the plastic lock 010 that corresponds with buckle 007 on base 004's the side, and buckle 007 inserts and realizes being connected of cover 006 and base 004 in the plastic lock 010, stirs the plectrum of plastic lock 010 and makes cover 006 lock to base 004 on, and the design of locking can prevent to make cover 006 and base 004 break away from when vibrating, simultaneously, can convenient and fast take apart when the cover 006 is taken apart to needs and maintain the inspection, the utility model has the advantages of reasonable design, simple to operate is nimble, and is sealed effectual, prevents that external water and dust from entering into in the box, overall structure design is compact, can effectually reduce low voltage distribution device's volume.

The relay box is fixed to the fuel cell system through the bending plate 015, so that the relay box is not easy to separate in the vibration process, the mounting position and the mode of the relay can be diversified through the design, the mounting position of the relay box can be flexibly designed, and low-voltage electrical development of the fuel cell system is facilitated.

In this embodiment, the base 004 has different hole locations 016, and the selection of the hole locations 016 can be selected according to the control and protection quantity of the low-voltage electrical system of the rear-end fuel cell; the rear end of the base 004 is inserted into the hole site 016 of the base 004 through the pin 011, and the relay 005, the fuse 008 and the diode 009 are installed at the front section of the base 004.

The wiring harness end of the contact pin 011 is directly connected with controlled and protected electrical parts of the low-voltage wiring harness of the fuel cell, the contact pin 011 is inserted into the relay base 004, and the appropriate relay 005, fuse 008 and diode 009 are selected according to the control requirements and electrical properties of the electrical parts.

The relay 005 mainly functions to control the large current by the small current or control the high voltage by the low voltage, and the type selection of the relay 005 is based on the fact that whether the relay is used is determined according to the operation mode of the electrical component, for example, the operation and the stop of the rear end electrical component need to be controlled by a switch, or the relay 005 needs to be added under the condition that the electrical component can supply power only under specific conditions, and the coil of the relay 005 needs to be selected according to the controller and the system voltage, typically 12V and 24V; the contact of the relay 005 needs to be determined according to the current of the electrical component, and the current can be determined according to the formula: in = P/U, In-rated working current, P-rated working power, and U-rated working voltage.

The fuse 008 has a main function of protecting electrical components and wire harnesses from long-time overload or short-circuit faults, and the type selection basis of the fuse is that the rated current of the electrical components is determined first, and then the selected current of the fuse 008 is determined through the rated current and the temperature coefficient.

The rated current calculation formula of the electrical part is as follows: in = P/U, In-rated working current, P-rated working power, and U-rated working voltage.

The main function of the diode 009 is to prevent the back emf generated by the back-end inductive load from affecting other electrical components or the power supply.

Can make this scheme can match according to the characteristic of the electric part of fuel cell rear end fast through cooperation such as base 004, fuse 008, relay 005, diode 009, solved different fuel cell system low pressure distribution problem, use this scheme can effectual reduction low pressure distribution device's volume simultaneously, improve the flexibility of system development, reduced the cycle of fuel cell system electrical development to the cost of reduction electric part that can be by a wide margin.

When in use: when need inspect fuel cell low voltage electrical problem or change inside relay 005, fuse 008, during diode 009, through setting aside the plectrum on the plastic lock 010, press buckle 007 on the base 004, make lid 006 and base 004 separate, can overhaul, fix with the fuel cell system through I001 in the fixed orifices, fixed orifices II 002 combines with fixture block 003, make can be firm be connected with the fuel cell system of relay box, and can improve vibration resistance, gasket 014 and sealing plug prevent that external water and dust from getting into in the relay and make it reach IP 67's protection level, the problem of water and dust to the corruption of parts such as relay 005, fuse 008, diode 009 and connector has been solved, prevent that steam from leading to the short circuit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fuel cell system low pressure distribution device, includes base (004), lid (006), board (015), contact pin (011) of bending, its characterized in that: the upper surface of base (004) is provided with hole site (016), installs contact pin (011) in hole site (016), and contact pin (011) rear end crimping upper seal plug I (012) is used for the sealed of rear end, the side of base (004) is provided with spacing groove (017), is provided with fixture block (003) between spacing groove (017), be provided with fixed orifices II (002) on board (015) of bending, insert in spacing groove (017) board (015) of bending, fixture block (003) card is in fixed orifices II (002), the position of bending on board (015) of bending is provided with fixed orifices I (001), install packing ring (014) around base (004) upper surface, lid (006) are installed on base (004).

2. A fuel cell system low voltage power distribution apparatus as defined in claim 1, wherein: and a sealing plug II (013) is arranged on the hole position (016) without the contact pin (011).

3. A fuel cell system low voltage power distribution apparatus as claimed in claim 2, wherein: the novel plug-in connector further comprises a relay (005), a fuse (008) and a diode (009), wherein the relay (005), the fuse (008) and the diode (009) are respectively installed on the contact pin (011).

4. A fuel cell system low voltage power distribution apparatus as defined in claim 1, wherein: the side of the cover (006) is provided with a buckle (007), the side of the base (004) is provided with a plastic lock (010) corresponding to the buckle (007), and the buckle (007) is inserted into the plastic lock (010) to connect the cover (006) and the base (004).