CN213936284U

CN213936284U - Current conduction structure of fuel cell stack

Info

Publication number: CN213936284U
Application number: CN202023153910.3U
Authority: CN
Inventors: 杨宇明; 欧阳洵; 朱俊娥
Original assignee: Beijing Nowogen Technology Co ltd
Current assignee: Beijing Nowogen Technology Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-10
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a current conduction structure of fuel cell pile belongs to the fuel cell field, including current collector, end plate and connector, current collector fixed mounting is on a side of end plate, and connector fixed mounting is on another side of end plate, and is provided with the through-hole on the end plate so that connector and current collector electric connection, and wherein, the material of end plate is insulating material, and the material of end plate reaches 5 x 10 for soaking back insulation resistance¹⁰Omega and the dielectric strength is more than 500V/mm. The utility model discloses the structure is simplified, reasonable in design not only can reduce space and occupy, can also reduce space and occupyThe current conduction resistance can be reduced and the vehicle-mounted vibration adaptability can be improved.

Description

Current conduction structure of fuel cell stack

Technical Field

The utility model relates to a fuel cell field, in particular to current conduction structure of fuel cell pile.

Background

In the prior art, a fuel cell stack needs to lead out current through a current collecting plate 1, and then transfers the current to a connector (commonly called an aviation plug) on a waterproof shell through a wiring terminal 4, as shown in fig. 4, but the current transfer mode increases contact resistance of current conduction therewith, and because both ends of the wiring terminal 4 need to be fastened by screws, the connector and the current collecting plate can vibrate out of synchronization under high-frequency vibration, which directly results in loosening of fastening screws, further leads to increase of current conduction resistance, and even leads to the occurrence of situations such as arc melting of contact points in severe cases.

In addition, the existing fuel cell stack design has certain space waste in the switching process due to the integration of an IP67 module, so that the integration difficulty and the installation difficulty are increased, and the stability and the reliability of the electrode connection of the collector plate are influenced due to the asynchronous vibration frequency under the vehicle-mounted vibration.

SUMMERY OF THE UTILITY MODEL

The current conduction structure occupation space to the fuel cell galvanic pile that prior art exists is big, the reliability is low, still increases the loss of current conduction simultaneously and the poor problem of on-vehicle vibration adaptability, the utility model aims at providing a current conduction structure of fuel cell galvanic pile.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a current conduction structure of fuel cell pile, includes current collector plate, end plate and connector, current collector plate fixed mounting be in on a side of end plate, connector fixed mounting be in on another side of end plate, just be provided with the through-hole on the end plate so that the connector with current collector plate electric connection, wherein, the material of end plate is insulating material.

Preferably, the end plate is made of a material with the insulation resistance reaching 5 multiplied by 10 after being soaked in water¹⁰Omega and the dielectric strength is more than 500V/mm.

Preferably, the non-metallic material is PPS, glass fiber laminate, or nylon.

Furthermore, a groove matched with the current collecting plate is arranged on one side surface of the end plate.

Preferably, the connector is a waterproof connector fixed to the other side surface of the end plate by a screw.

Preferably, the connector is connected to the current collecting plate by a screw, and the current collecting plate is fixed to one side surface of the end plate by a screw.

By adopting the technical scheme, the current collecting plate and the connector are respectively fixedly connected onto the end plate, and the end plate is made of the insulating material, so that the connector can penetrate through the end plate and is directly connected onto the current collecting plate, the arrangement of a wiring terminal is avoided, the current conduction resistance is greatly reduced, the conduction efficiency is improved, the problem of asynchronous vibration does not exist between the current collecting plate and the connector, the vehicle-mounted vibration adaptability is improved, the structure is simplified, the size is reduced, and the space is saved.

Drawings

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

fig. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the present invention;

fig. 4 is a schematic view of a connection structure between a current collecting plate and a terminal in the prior art.

In the figure, 1-current collecting plate, 2-end plate, 21-groove, 3-connector and 4-wiring terminal.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

A current conducting structure of a fuel cell stack, as shown in FIGS. 1 and 2, includes a current collecting plate 1, an end plate 2, and a connector 3.

The collecting plate 1 is a metal plate, a plurality of through holes for screws to pass through are formed in the collecting plate 1, a plurality of threaded holes are correspondingly formed in one side face of the end plate 2, and therefore the collecting plate 1 is fixedly installed on the end plate 2 through the screws. Wherein, the number of the screws used for fixing the collector plate 1 on the end plate 2 is not less than three, and the screws are evenly distributed.

In this embodiment, the end plate 2 is a plate-shaped structure made of an insulating material, and specifically, the insulation resistance after water immersion reaches 5 × 10¹⁰Omega and the dielectric strength is more than 500V/mm, such as PPS, glass fiber laminated plate or nylon.

The connector 3 is a waterproof connector, and the end plate 2 is provided with a through hole through which one end of the connector 3 is connected to the current collecting plate 1, and a mounting seat thereof is fixedly attached to the other side surface of the end plate 2 by a screw and hermetically covers the through hole. One end of the connector 3 penetrating through the through hole is fixedly connected with the current collecting plate 1 through a screw, and an electrical connection relation is formed between the connector 3 and the current collecting plate 1, so that the current on the current collecting plate 1 is conducted to the connector 3. Wherein, the number of the screws used for fixing the connector 3 on the end plate 2 is not less than four, and the screws are evenly distributed; and not less than three screws are used for connecting the connector 3 and the collector plate 1.

When the fuel cell is used, as shown in fig. 3, the end plates 2 in the plurality of current conduction structures enclose a closed space together, so that a galvanic pile of the fuel cell is closed, the current of the galvanic pile is directly conducted to the connector 3 through the current collecting plate 1, and the middle part of the galvanic pile does not pass through the wiring terminal 4, so that the conduction resistance is greatly reduced; the connector 3 and the current collecting plate 1 vibrate synchronously, so that the problem that the connector 3 and the current collecting plate 1 vibrate asynchronously under high-frequency vibration is avoided, and the situations of current conduction resistance increase, contact point arc melting and the like caused by loosening of the wiring terminal 4 are further avoided; when the structure of the utility model is used, the vertical installation is not affected by any force, the deformation can not occur, and the structure can be installed at one time when being installed; the utility model has the advantages of reasonable design, can greatly reduced space occupy during the use.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. A current conducting structure of a fuel cell stack, characterized in that: including current collector, end plate and connector, current collector fixed mounting be in on the side of end plate, connector fixed mounting be in on another side of end plate, just be provided with the through-hole on the end plate so that the connector with current collector electric connection, wherein, the material of end plate is insulating material.

2. The current conducting structure of a fuel cell stack according to claim 1, characterized in that: the end plate is made of a material with the insulation resistance of 5 multiplied by 10 after being soaked in water¹⁰Omega and the dielectric strength is more than 500V/mm.

3. The current conducting structure of a fuel cell stack according to claim 2, characterized in that: the non-metal material is PPS, a glass fiber laminated board or nylon.

4. The current conducting structure of a fuel cell stack according to claim 1, characterized in that: and one side surface of the end plate is provided with a groove matched with the current collecting plate.

5. The current conducting structure of a fuel cell stack according to claim 1, characterized in that: the connector is a waterproof connector which is fixed on the other side surface of the end plate through a screw.

6. The current conducting structure of a fuel cell stack according to claim 1, characterized in that: the connector is connected with the current collecting plate through a screw, and the current collecting plate is fixed on one side surface of the end plate through a screw.