Utility model content
The embodiment of the utility model provides a kind of bipolar plates and fuel cell, can control the pressure drop of runner certain
In the range of, water logging phenomenon is avoided the occurrence of, and the air flow method in reaction zone can be made more uniform, fuel electricity can be effectively improved
The performance and stability in pond.
In order to achieve the above objectives, on the one hand, the utility model embodiment provides a kind of bipolar plates, including:
Bipolar plates body, the working media flow field being arranged on the bipolar plates body, the working media flow field include
It reaction zone and is arranged on and the shunting zone of the reaction zone entrance side and is arranged on the doab of the reaction zone outlet side;
Wherein, the reaction zone be parallel flow field, including the runner that several are extended in a first direction, the shunting zone and
The doab includes at least two and the sub- circulating areas of the corresponding connection of runner of identical item number respectively, each with identical item
The sum of the correspondence shunting zone of several flow passages and the area of sub- circulating area of the doab are equal.
Optionally, the structure reverse symmetry of the shunting zone and the doab set, and the entrance of the shunting zone and
The doab outlet be located at at the border flush position of the reaction zone, the border of the reaction zone refers to the reaction
Area is perpendicular to the marginal position of the extending direction of the runner.
Optionally, each sub- circulating area of the shunting zone and the doab is corresponding at least two runners respectively
Connection.
Optionally, the entrance of the shunting zone and the exit normal of the doab are set in the extending direction of the runner
It puts.
Optionally, the entrance opening dimension of each sub- circulating area of the shunting zone is equal;Correspondingly, the doab
The outlet size of each sub- circulating area is equal.
Optionally, the shunting zone and the doab are rectangular configuration, sector structure or triangular structure.
Optionally, runner described in each is through-type runner or wave line style runner.
Optionally, two surfaces up and down of the bipolar plates body are equipped with the working media flow field.
Optionally, the working media flow field on one of surface in two surfaces up and down of the bipolar plates body is anti-
Gas flowfield is answered, the working media flow field on another surface is coolant flow field;Wherein, the reaction gas for anodic gas and
One of which in cathode gas;Alternatively,
The working media flow field on one of surface in two surfaces up and down of the substrate is anode gas flow field, separately
The working media flow field on one surface is cathode gas flow fields.
On the other hand, the utility model embodiment provides a kind of fuel cell, including:At least two bipolar plates, Yi Jishe
The membrane electrode between two adjacent bipolar plates is put, wherein, at least one bipolar plates are bipolar plates as described above.
The utility model embodiment provides a kind of bipolar plates, by the way that reaction zone is provided parallel to flow field, with serpentine flow
It compares, the pressure drop of reaction zone can be controlled in certain scope, avoid the occurrence of water logging phenomenon, meanwhile, by described anti-
It answers the entrance side in area and outlet side that shunting zone and doab are set respectively, and the shunting zone and the doab is set respectively
For at least two and the sub- circulating area of the corresponding connection of runner of identical item number, in operation of fuel cells, air-flow can be through institute
The each sub- circulating area for stating shunting zone is allocated, and electrochemical reaction occurs into the parallel flow field of reaction zone, after reaction
Residual gas stream and product enter doab each sub- circulating area converge and through doab outlet discharge, in this process
In, due to the sum of the area of sub- circulating area of each correspondence shunting zone with the flow passage of identical item number and doab phase
Deng therefore, it is possible to make the air flow rate by each sub- circulating area distribution into each runner of reaction zone of shunting zone basic
It is identical, so as to improve the uniformity coefficient of distribution of air flow, fuel cell current Density Distribution is improved, fuel can be effectively improved
The performance and stability of battery.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
In the description of the utility model, it is to be understood that term " " center ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instructions such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on attached drawing institutes
The orientation or position relationship shown is for only for ease of description the utility model and simplifies description rather than instruction or imply signified
Device or component must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that this practicality
New limitation.
Term " first ", " second " be only used for description purpose, and it is not intended that instruction or imply relative importance or
The implicit quantity for indicating indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more this feature.In the description of the utility model, unless otherwise indicated, " multiple " are meant that two
It is a or more than two.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection;It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements.For
For those of ordinary skill in the art, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
On the one hand, the utility model embodiment provides a kind of bipolar plates, referring to Fig. 1, including:
Bipolar plates body 1, the working media flow field 2 being arranged on the bipolar plates body 1, the working media flow field 2
Including reaction zone A and it is arranged on and the shunting zone B of the reaction zone A entrance sides and is arranged on the remittance of the reaction zone A outlet sides
Flow area C;
Wherein, the reaction zone A is parallel flow field, including the runner 21 that several are extended in a first direction, the shunting
The area B and doab C includes at least two sub- circulating area (shuntings with the 21 corresponding connection of runner of identical item number respectively
The sub- circulating area of area B is denoted as 22,23) the sub- circulating area of doab C is denoted as, each connection of runner 21 with identical item number
The sum of the area of sub- circulating area (22 and 23) of corresponding shunting zone B and doab C is equal.
Wherein, if the sub- circulating area 22 of correspondence shunting zone B and correspondence doab C that connect with the runner 21 of identical item number
The number of sub- circulating area 23 be respectively i, as shown in Figure 1, by the correspondence shunting zone B's connected with the runner 21 of identical item number
The area of sub- circulating area 22 is denoted as S1, S2, S3 respectively ... Si, correspondingly, will corresponding doab C sub- circulating area 23 face
Integration is not denoted as S1 ', S2 ', S3 ' ... Si ', so, the correspondence shunting zone of each connection of runner 21 with identical item number and
The sum of area of sub- circulating area of doab C is respectively S1+S1 ', S2+S2 ', S3+S3 ' ... Si+Si ', equal to a constant.
The utility model embodiment provides a kind of bipolar plates, by the way that reaction zone A is provided parallel to flow field, with serpentine flow
It compares, the pressure drop of reaction zone A can be controlled in certain scope, avoid the occurrence of water logging phenomenon, meanwhile, by described anti-
Answer the entrance side of area A and outlet side that shunting zone B and doab C are set respectively, and by the shunting zone B and doab C points
At least two sub- circulating areas with the 21 corresponding connection of runner of identical item number, in operation of fuel cells, gas are not arranged to
Stream can be allocated through each sub- circulating area 22 of the shunting zone B, and electrochemistry occurs into the parallel flow field of reaction zone A
Reaction, each sub- circulating area 23 that residual gas stream and product after reaction enter doab C converges and going out through doab C
Mouth discharge, in the process, due to the subflow of each correspondence shunting zone B connected with the runner 21 of identical item number and doab C
The sum of the area of logical region (22 and 23) is equal, therefore, it is possible to which each sub- circulating area 22 by shunting zone B is made to distribute into anti-
The air flow rate for answering each runner 21 of area A is essentially identical, so as to improve the uniformity coefficient of distribution of air flow, improves fuel
Cell current density is distributed, and can effectively improve the performance and stability of fuel cell.
Wherein, the air-flow can be gas or liquid, you can with for anodic gas, or cathode gas, also
It can be cooling agent.
In one embodiment of the utility model, referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the shunting zone B and the doab C
Structure set compared with the reaction zone A reverse symmetries, and the outlet point of the entrance of the shunting zone B and the doab C
Not Wei Yu at the border flush position of the reaction zone A, the border of the reaction zone A refers to the reaction zone A perpendicular to institute
State the marginal position of the extending direction of runner 21.
In the utility model embodiment, by by the structure of the shunting zone B and the doab C compared with described anti-
Area's A reverse symmetries is answered to set, when air-flow enters each runner 21 of reaction zone A by each sub- circulating area 22 of shunting zone B,
The flow resistance that can make the air-flow in each sub- circulating area is basically identical so that into each runner 21 flow more
Adjunction is near, can further improve the uniformity coefficient of distribution of air flow;Meanwhile by by the entrance of the shunting zone B and doab C
Outlet be arranged on at the border flush position of the reaction zone A, each subflow of the shunting zone B and the doab C
Logical region can extend in a second direction to be connected with each runner 21, and second direction refers to the entrance and institute by the shunting zone B
The direction where the outlet line of doab C is stated, so, each sub- circulating area can be arranged to approximately along second party
To the runner of extension, the runner for avoiding sub- circulating area to extend along multiple directions causes the larger situation of air-flow flow resistance
Occur, and each sub- circulating area is arranged to the runner substantially extended in a second direction, air-flow can be made to lead in each subflow
Smooth outflow in region reduces the flow resistance of air-flow.
Wherein, each sub- circulating area of the shunting zone B and doab C can be the folding extended in a second direction
Curved runner, or the arced flow path extended in a second direction can also be the through-type runner extended in a second direction.
Illustratively, referring to Fig. 2, when each sub- circulating area of the shunting zone B and doab C is along second party
To extension bending-type runner when, the shunting zone B and the doab C can be rectangular configuration;Referring to Fig. 3, when described point
Stream the area B and doab C each sub- circulating area be extend in a second direction arced flow path when, the shunting zone B and
The doab C can be sector structure;Referring to Fig. 4, when each sub- circulating area of the shunting zone B and doab C
For extend in a second direction through-type runner when, the shunting zone B and the doab C can be triangular structure.
In the another embodiment of the utility model, referring to Fig. 5, each subflow of the shunting zone B and the doab C are led to
Region respectively at least two 21 corresponding connections of runner.So, each height of the shunting zone B and the doab C
The port size of runner 21 corresponding to circulating area is larger, can effectively reduce stream when air-flow flows into and out runner 2
Dynamic resistance so as to reduce the pressure difference between 21 entrance of runner, is conducive to the transmission of air-flow and the stabilization of fuel cell
Operation.
Wherein, the setting direction of the outlet of the entrance to the shunting zone B and the doab C does not limit.
In one preferred embodiment of the utility model, referring to Fig. 3 and Fig. 4, the entrance of the shunting zone B and the doab
The exit normal of C is set in the extending direction of the runner 21.So, the shunting zone B can be increased to the full extent
With the area of the doab C, shunting and confluence effect are improved.
In one embodiment of the utility model, referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, each sub- Circulation Area of the shunting zone B
The entrance opening dimension in domain 22 is equal;Correspondingly, the outlet size of each sub- circulating area 23 of the doab C is equal.
In the utility model embodiment, by by the entrance opening dimension phase of each sub- circulating area 22 of the shunting zone B
Deng, and the outlet size of each sub- circulating area 23 of the doab C is equal, and each runner 21 with identical item number connects
The sum of the area of sub- circulating area of logical correspondence the shunting zone B and the doab C is equal, can make reaction gas or
Cooling agent is essentially identical into the flow in each runner 21 by each sub- circulating area of shunting zone, ensure that the distribution of air-flow
High evenness improves the electric current distribution of fuel cell, can improve the performance of fuel cell.
In the another embodiment of the utility model, runner 21 described in each for through-type runner (as shown in Figure 6) or
Wave line style runner (as shown in Figure 7).
Since the bipolar plates body 1 has two surfaces being oppositely arranged, the bipolar plates body 1 can be in a table
The working media flow field 2 on face is set, the working media flow field 2 can also be respectively provided on both surfaces.Preferably, institute
Two surfaces up and down for stating bipolar plates body 1 are equipped with the working media flow field 2.
In one embodiment of the utility model, one of surface in two surfaces up and down of the bipolar plates body 1
Working media flow field 2 for reactant gas flow field, the working media flow field 2 on another surface is coolant flow field;Wherein, it is described
Reaction gas is the one of which in anodic gas and cathode gas;Alternatively,
The working media flow field 2 on one of surface in two surfaces up and down of the bipolar plates body 1 is anode gas
Body flow field, the working media flow field 2 on another surface is cathode gas flow fields.
It so, can be by the bipolar plates according to the difference in flow field when the bipolar plates are applied to fuel cell
It assembles, to generate electricity.
On the other hand, the utility model embodiment provides a kind of fuel cell, referring to Fig. 8, including:At least two bipolar plates
01 and the membrane electrode 02 that is arranged between two adjacent bipolar plates 01, wherein, at least one bipolar plates 01 are as described above
Bipolar plates.
The utility model embodiment provides a kind of fuel cell, using bipolar plates as described above, since the bipolar plates will
Reaction zone is provided parallel to flow field, compared with serpentine flow, can control in certain scope the pressure drop of reaction zone, avoid
There is water logging phenomenon, meanwhile, by setting shunting zone and doab respectively in the entrance side and outlet side of the reaction zone, and will
The shunting zone and the doab are respectively set at least two sub- Circulation Areas with the corresponding connection of runner of identical item number
Domain, in operation of fuel cells, air-flow can be allocated through each sub- circulating area of the shunting zone, into the flat of reaction zone
Electrochemical reaction occurs in row flow field, each sub- circulating area that the residual gas stream and product after reaction enter doab converges
And the outlet discharge through doab, in the process, due to each shunting zone and doab with the flow passage of identical item number
The sum of the area of sub- circulating area it is equal, therefore so that air-flow enters reaction zone by each sub- circulating area of shunting zone
The flow of each runner is essentially identical, can improve the uniformity coefficient of distribution of air flow, improves fuel cell current Density Distribution,
So as to effectively improve the performance of fuel cell and stability.
Wherein, since the fuel cell includes cathode plate and anode plate, when the cathode plate and the anode plate select
During with bipolar plates as described above, referring to Fig. 8, the operation principle of fuel cell is as follows:Anodic gas stream on the anode plate
For circulating hydrogen, the cathode gas flow fields on the cathode plate are for ventilating air or oxygen, so, in fuel electricity
When pond works, oxidation reaction occurs in membrane electrode under the catalysis of catalyst for hydrogen, generates hydrogen ion (H+) and electronics (e-), hydrogen
Ion (H+) cathode plate reached by membrane electrode 02, the oxygen on cathode plate issues raw reduction reaction in catalyst action, generates
Negative oxygen ion, negative oxygen ion and hydrogen ion (H+) generation water is combined, the water of generation is discharged with unreacted air or oxygen,
The electronics that hydrogen gas side generates reaches cathode plate by external circuit, as electronics (e-) pass sequentially through anode plate and external circuit flows to cathode
Electric current is generated during plate.
The above is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, in the technical scope that any one skilled in the art discloses in the utility model, variation can be readily occurred in
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain of profit requirement.