CN218274670U

CN218274670U - Fuel cell stack detection system

Info

Publication number: CN218274670U
Application number: CN202222184030.5U
Authority: CN
Inventors: 李建; 彭太坤
Original assignee: Shenzhen Wanlian Xinneng Technology Co ltd
Current assignee: Shenzhen Wanlian Xinneng Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-01-10
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a fuel cell stack detecting system relates to fuel cell technical field. A fuel cell stack sensing system comprising: the fuel cell stack comprises at least one first polar plate and at least one second polar plate, the at least one first polar plate and the at least one second polar plate are sequentially and alternately stacked, the first polar plate comprises a first connector, and the second polar plate comprises a second connector; the length directions of the first polar plate and the second polar plate are both vertical to the stacking direction of the polar plate group; the first connector and the second connector are positioned on the same side of the pole plate group, and are spaced in the length direction; and one of the two groups of battery voltage acquisition devices is connected with at least one first connector, and the other of the two groups of battery voltage acquisition devices is connected with at least one second connector. The utility model discloses technical scheme makes CVP can 100% carry out the inspection of full pi n to fuel cell stack.

Description

Fuel cell stack detection system

Technical Field

The utility model relates to a fuel cell technical field, in particular to fuel cell pile detecting system.

Background

The fuel cell, especially the hydrogen fuel cell, is mainly used in the fields of fuel cell powered vehicles, passenger cars, trucks of new energy vehicles, new energy fuel cell powered locomotives, aircrafts, household distributed power supplies and the like. The plates and the plurality of membrane electrodes can be stacked to assemble a stack of fuel cells.

Because the distance between the polar plates is small, the CVP generally adopts a mode of detecting the polar plates at intervals to detect the voltage of the fuel cell stack, so that the problem of low detection reliability exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fuel cell pile detecting system aims at solving the not high problem of fuel cell's voltage acquisition reliability among the prior art.

In a first aspect, the present application provides a fuel cell stack sensing system comprising:

the fuel cell stack comprises at least one first polar plate and at least one second polar plate, the at least one first polar plate and the at least one second polar plate are sequentially and alternately stacked, the first polar plate comprises a first connecting head, and the second polar plate comprises a second connecting head; the length directions of the first polar plate and the second polar plate are both vertical to the stacking direction of the polar plate group; the first connector and the second connector are positioned on the same side of the pole plate group, and are spaced in the length direction, so that the first connector and the second connector are respectively used for being connected with different battery voltage acquisition devices; and

one of the two groups of battery voltage acquisition devices is connected with at least one first connector, and the other of the two groups of battery voltage acquisition devices is connected with at least one second connector.

In one embodiment, a part of one side edge of the first electrode plate protrudes to form the first connecting head.

In an embodiment, the second connector is formed by protruding a portion of the edge of the second polar plate on the same side as one side of the first polar plate.

In one embodiment, in the length direction, the first pole plate has a first end, the second pole plate has a second end, and the first end and the second end are oppositely arranged;

the first connector is close to the first end, and the second connector is close to the second end.

In one embodiment, the first plate is integrally formed with the first connector; and/or

The second polar plate and the second connector are integrally formed.

In an embodiment, the battery voltage collecting device is detachably connected to the first connector or the second connector in an inserting manner.

In an embodiment, the first connector and/or the second connector has a pick-up device bayonet.

In one embodiment, the battery voltage acquisition device comprises:

a body provided with the plurality of contact pins;

the locking piece is rotatably connected to the side wall of one side of the body so as to rotate between a locking position of being clamped into the bayonet of the collecting device and a releasing position of being separated from the bayonet of the collecting device; and

the elastic component, the elastic component set up in the retaining member with between the body, be used for often driving the retaining member is followed release position case to locking position rotates.

In one embodiment, the distance between two adjacent first pole plates and the second pole plates is half of the distance between two adjacent pins of the battery voltage acquisition device.

In one embodiment, adjacent two of the pins are staggered with respect to each other.

The technical scheme of the utility model is that at least one first polar plate and at least one second polar plate are sequentially and alternately stacked to form a polar plate group of the fuel cell stack, the first polar plate comprises a first connector, the second polar plate comprises a second connector, and the length directions of the first polar plate and the second polar plate are both vertical to the stacking direction of the polar plate group; the first connector and the second connector are located on the same side of the pole plate group, and the first connector and the second connector are spaced in the length direction, so that the first connector and the second connector are respectively used for being connected with different battery voltage acquisition devices. Therefore, the utility model discloses in, fuel cell pile has formed the dislocation structure that supplies battery voltage collection system CVP to inserting promptly to make adjacent first polar plate and second polar plate can be respectively with the battery voltage collection system CVP of difference to inserting, make CVP can carry out full pi n inspection to fuel cell pile 100%.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the connection between the fuel cell stack and the cell voltage collecting device of the present invention;

FIG. 2 is an enlarged schematic view of section I of FIG. 1;

fig. 3 is a schematic structural view of the electrode plate assembly of the present invention;

fig. 4 is a top view of the battery voltage collecting device of the present invention;

fig. 5 is a schematic axial view of the battery voltage collecting device of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the related art, fuel cells, particularly hydrogen fuel cells, are mainly used in the fields of fuel cell powered vehicles, passenger cars, trucks, new energy fuel cell powered locomotives, aircraft, household distributed power supplies, and the like of new energy vehicles. Wherein the plate and the plurality of membrane electrodes can be stacked to assemble a stack of fuel cells. Because the distance between the polar plates of the fuel cell is small, such as 1.1mm, the cell voltage acquisition device CVP generally adopts a mode of detecting the polar plates at intervals to detect the voltage of the fuel cell stack, and because 100% of all detection is not carried out, the problem of low detection reliability exists.

Therefore, the utility model provides a fuel cell pile detecting system, fuel cell pile 20 among this fuel cell pile detecting system constructs the connector of dislocation through adopting between adjacent polar plate to make adjacent polar plate can be respectively with different battery voltage collection system CVP10 to inserting, make CVP10 can 100% carry out full pi n inspection to fuel cell pile 20.

The concept of the present application is further illustrated below with reference to some specific embodiments.

Referring to fig. 1, the present embodiment provides a fuel cell stack testing system. The fuel cell stack 20 inspection system can be used for an automobile or the like.

In this embodiment, a fuel cell stack detection system includes: the fuel cell stack 20 is connected with two sets of cell voltage collecting devices.

The fuel cell stack 20 includes at least one first electrode plate 21 and at least one second electrode plate 22, the at least one first electrode plate 21 and the at least one second electrode plate 22 are alternately stacked in sequence, the first electrode plate 21 includes a first connector 211, the second electrode plate 22 includes a second connector 221, and the length directions of the first electrode plate 21 and the second electrode plate 22 are perpendicular to the stacking direction of the electrode plate groups. The first connector 211 and the second connector 221 are located on the same side of the electrode plate group, and the first connector 211 and the second connector 221 are spaced apart in the length direction, so that the first connector 211 and the first connector 221 are respectively used for being connected with different battery voltage collecting devices.

One of the two sets of battery voltage acquisition devices is connected to at least one first connector 211, and the other of the two sets of battery voltage acquisition devices is connected to at least one second connector 221.

Specifically, the first electrode plate 21 and the second electrode plate 22 are made of metal (e.g., stainless steel) in the present embodiment, and carbon composite material or any other material suitable for use as electrode plates may be used.

It is understood that, in the present embodiment, the electrode plate set is used in the fuel cell stack 20, and a plurality of electrode plate sets are stacked to form a fuel cell by combining at least one Membrane Electrode Assembly (MEA), at least one Gas diffusion Layer (Gas Di ffus i on Layer, GDL), the first end plate and the second end plate according to the use requirement.

Referring to fig. 1 and 2, in the stacking direction of the fuel cell, at least one first electrode plate 21 and at least one second electrode plate 22 are alternately stacked in sequence, and the first electrode plate 21 and the second electrode plate 22 both extend on a plane perpendicular to the stacking direction, where the length directions of the first electrode plate 21 and the second electrode plate 22 are both perpendicular to the stacking direction of the electrode plate group. The plate group as a whole has four side faces intersecting this plane, i.e. 4 side faces connecting two axial end faces of the plate group. On one of the side surfaces, such as the upper cotton surface in the present embodiment, the first pole plate 21 has the first connectors 211, the second pole plate 22 has the second connectors 221, and on the plane of any one pole plate, the projection of all the first connectors 211 and the projection of all the second connectors 221 on the plane are staggered with each other, so that in the present embodiment, connectors are arranged in a staggered manner with each other between adjacent pole plates in the pole plate group. Thus, adjacent first and

second plates

21, 22 may be respectively interleaved with different cell voltage collection devices CVP10, such that the CVP10 may perform a full pn test on the fuel cell stack 20 at 100%.

For example, referring to fig. 3, in the fuel cell stack 20, odd columns are first plates 21, which cooperate with the first group of cell voltage collection devices CVP10 to achieve detection. And the even columns are second plates 22 which cooperate with the second group of battery voltage acquisition devices CVP10 to realize detection. At this time, the first group of cell voltage collecting devices CVP10 necessarily protrudes by a length of one plate pitch from the second group of cell voltage collecting devices CVP10 in the plate stacking direction of the fuel cell stack 20.

In one embodiment, to facilitate the insertion of the CVP10, a portion of one side edge of the first plate 21 protrudes to form the first connector 211.

Referring to fig. 1 to 3, the first side wall is taken as an example of an upper side wall of the plate group for specific explanation, at this time, the first plate 21 includes a rectangular plate body, and an upper edge of the plate body is protruded upward to form a first connection joint 211. Preferably, at this time, the first electrode plate 21 and the first connector 211 are integrally formed.

In one embodiment, to facilitate the insertion of the CVP10, a portion of a side edge of the second electrode plate 22 protrudes to form the second connector 221, and the side edge of the second electrode plate 22 is the same side edge as the edge of the first electrode plate 21 having the first connector 211. Preferably, at this time, the second plate 22 and the second connector 221 are integrally formed.

Referring to fig. 1 to 3, at this time, the second electrode plate 22 includes a rectangular electrode plate body, and the upper edge of the electrode plate body protrudes upward to form a second connector.

It can be understood that the first connector 211 and the second connector 221 are located on the same side of the electrode plate group, so that the plugging space of the CVP10 is reduced, and a small space is occupied during detection as much as possible. It may also be advantageous for an inspector to insert multiple CVPs 10 into the fuel cell stack 20 at the same orientation to improve efficiency.

In one embodiment, in the length direction, the first polar plate 21 has a first end, the second polar plate 22 has a second end, and the first end and the second end are oppositely arranged;

the first connector 211 is close to the first end, and the second connector 221 is close to the second end.

Referring to fig. 1 and 3, in order to provide sufficient operating space for the battery voltage collecting device CVP10 connected to the first connector 221 and the battery voltage collecting device CVP10 connected to the second connector 221, the first connector 221 is disposed near the left end of the corresponding first pole plate 21, and the second connector 221 is disposed near the right end of the corresponding second pole plate 22.

In one embodiment, in order to improve the detection efficiency, the battery voltage collecting device is detachably engaged with the first connector 211 or the second connector 221. Specifically, the detachable fit may be a snap fit, a pre-loaded backstop pin fit, a plug-type fit, or the like. This embodiment is not limited thereto.

In one embodiment, the first connector 211 and/or the second connector 221 have a pick-up mount 23.

Referring to fig. 3, the left side of the first connector 211 has a collecting device bayonet 23, and the upper side of the second connector 221 has a collecting device bayonet 23. The acquisition device bayonet 23 is used for matching with a locking structure on the CVP10 to improve the reliability of connection between the CVP1O and the fuel cell, and further avoid the separation of the CVP10 and the connector in the detection process.

At this time, the battery voltage collecting device includes: a body, a locking member 12 and an elastic member.

The body is provided with a plurality of pins 11; the locking piece 12 is rotatably connected to one side wall of the body so as to rotate between a locking position of being clamped into the collecting device bayonet 23 and a releasing position of being separated from the collecting device bayonet 23; the elastic member is disposed between the locker 12 and the body for always driving the locker 12 to rotate from the release position to the locking position.

As shown in fig. 4 and 5, the body is a prism, and has a plurality of rectangular holes for the connectors (the first connector 211 or the second connector 221) to be inserted into, and a plurality of wires on one end surface. A locking member 12 is hinged to one side wall of the body. In this embodiment, the locking member 12 can be a latch, the middle of the latch is hinged to the body, and one end of the latch is bent and extended to form a fastening portion. The other end of the clamping tongue forms a handle part for the maintainer to press. A torsion spring is arranged between the clamping tongue and the body, so that the clamping part of the clamping tongue is always driven to be clung to the side wall of the body, namely the clamping part of the clamping tongue is always driven to rotate from a release position to a locking position. Thus, when the CVP10 is engaged with the first connector 211 or the second connector 221, the engaging portion is engaged with the pickup unit mount 23 by the elastic member.

It will be appreciated that retaining member 12 can also be configured as a detent or other equivalent feature.

In one embodiment, the distance between the adjacent first and

second plates

21 and 22 is half of the distance between the two adjacent pins 11 of the battery voltage collecting device.

In this embodiment, since the adjacent plates provide connectors in staggered arrangement, that is, for any CVP10, the plurality of pins 11 are only used for inserting two adjacent first plates 21 or two adjacent second plates 22, the distance between two adjacent pins 11 can be configured to be the same as the distance between two adjacent first plates 21 or two adjacent second plates 22, that is, twice the distance between two adjacent first plates 21 and two adjacent second plates 22.

Therefore, in the embodiment, the distance between the adjacent pins 11 of the CVP10 can be twice as long as the distance between the conventional pins 11, and if the distance between the pads is 1.1mm, the distance between the adjacent pins 11 can be 2.2mm, so as to increase the insulation thickness between the two Pi n pins of the CVP10, thereby avoiding the occurrence of defects caused by insufficient barrier thickness.

In one embodiment, adjacent pins 11 are offset from each other.

Referring to fig. 4, one of the adjacent pins 11 is disposed close to the locker 12 and the other is disposed far from the locker 12, thereby facilitating installation of the pins 11 and the lead in a narrow space and reducing the volume of the CVP 10.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A fuel cell stack sensing system, comprising:

the fuel cell stack comprises at least one first polar plate and at least one second polar plate, the at least one first polar plate and the at least one second polar plate are sequentially and alternately stacked, the first polar plate comprises a first connector, the second polar plate comprises a second connector, and the length directions of the first polar plate and the second polar plate are perpendicular to the stacking direction of the polar plate groups; the first connector and the second connector are positioned on the same side of the electrode plate group, and are spaced apart in the length direction, so that the first connector and the first connector are respectively used for being connected with different battery voltage acquisition devices; and

and one of the two groups of battery voltage acquisition devices is connected with at least one first connector, and the other of the two groups of battery voltage acquisition devices is connected with at least one second connector.

2. The fuel cell stack detecting system according to claim 1, wherein a portion of one side edge of the first electrode plate protrudes to form the first connection terminal.

3. The fuel cell stack detection system according to claim 2, wherein a portion of the edge of the second electrode plate on the same side as one side of the first electrode plate protrudes to form the second connector.

4. The fuel cell stack sensing system of claim 1, wherein the first plate has a first end and the second plate has a second end in the length direction, and the first end and the second end are disposed opposite each other;

5. The fuel cell stack sensing system of claim 4, wherein the first plate is integrally formed with the first connector; and/or

The second polar plate and the second connector are integrally formed.

6. The fuel cell stack detecting system according to any one of claims 1 to 5, wherein the cell voltage collecting device is detachably engaged with the first connector or the second connector.

7. The fuel cell stack sensing system of claim 6, wherein the first connector and/or the second connector has a pick-up bayonet.

8. The fuel cell stack sensing system of claim 7, wherein the cell voltage collecting means comprises:

a body provided with the plurality of contact pins;

9. The fuel cell stack detecting system according to claim 8, wherein a distance between adjacent first and second electrode plates is half of a distance between adjacent two pins of the cell voltage collecting device.

10. The fuel cell stack sensing system of claim 8, wherein adjacent two of the pins are offset from each other.