CN105742650A - Bipolar plate for fuel cell stack and fuel cell stack - Google Patents
Bipolar plate for fuel cell stack and fuel cell stack Download PDFInfo
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- CN105742650A CN105742650A CN201410778425.5A CN201410778425A CN105742650A CN 105742650 A CN105742650 A CN 105742650A CN 201410778425 A CN201410778425 A CN 201410778425A CN 105742650 A CN105742650 A CN 105742650A
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- fuel cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention provides a bipolar plate for a fuel cell stack. The bipolar plate comprises a metal plate and heat-conducting metal fins, wherein flow fields are etched on double surfaces of the metal plate; the heat-conducting metal fins are located at the edge of the periphery of the metal plate and are vertically arranged at the periphery of the metal plate; the material of the metal plate is one of a precious metal-plated stainless steel plate, a precious metal-plated aluminum plate, a precious metal-plated titanium plate, a precious metal-plated titanium alloy plate and a precious metal-plated aluminum alloy plate; the precious metal is the alloy of more than one or two of platinum, gold, silver, palladium and iridium; and the heat-conducting metal fins are made of the alloy of more than one or two of copper, aluminum, gold, silver and nickel. The fuel cell stack employing the bipolar plate comprises the bipolar plate, a membrane electrode and end plates, wherein the bipolar plate and the membrane electrode are alternately laminated in sequence; and the end plates are located at two ends of a laminated assembly. When the stack is stored and started at not lower than -20 DEG C, the water content in the membrane electrode is not higher than 12g/cm<2>. Compared with the prior art, the bipolar plate has the advantages of being low in energy consumption, convenient to implement and the like.
Description
Technical field
The invention belongs to field of fuel cell technology, more particularly to the fuel cell pile of a kind of fuel cell pile bipolar plates and this bipolar plates of employing suitable in storage under low temperature environment and startup.
Background technology
Inevitably running into low temperature (subzero) environment when fuel cell uses out of doors, MEA can be caused damage by water-ice phase transformation at low temperatures, and the water content therefore controlling membrane electrode is to solve the key that fuel cell low temperature uses.During low temperature storage, in battery water content will the low damage to avoid water-ice phase transformation to bring, during cold-starting, water content is moderate, has both guaranteed that the electrical conductivity of film can not be too low, has prevented negative electrode water freezing from too much hindering oxygen transfer again.
For the problems referred to above, current solution is divided into: 1) insulation 2) start time be rapidly heated 3) dewater.The mode wherein dewatered is divided into again: gas purging, evacuation dewater, capillary draining, the temperature difference drive and dewater, it can be common that purging with nitrogen and dewater, but the method need to additionally consume energy.Evacuation dewaters and easily realizes at laboratory, but in battery system and infeasible.Utilize the temperature difference to drive to dewater, it is not necessary to extra power consumption and enforcement are convenient.
The temperature difference drives the principle dewatered to be the transmission that the difference in chemical potential utilizing temperature difference to cause carries out water, specific as follows: the thermal conductivity of each assembly in fuel cell list pond is different, and local environment is also different, and in temperature-fall period, each assembly exists temperature difference.Temperature is different, and the chemical potential of water is also different, and water region that chemically gesture is high can be transmitted to the region that chemical potential is low, by rationally arranging this temperature difference, makes water be increased to the mass transfer flux in pole plate direction by film in temperature-fall period, to reduce the icing destruction to MEA.Fuel cell pile is in temperature-fall period, and middle portion temperature is high, and two ends temperature is low, and water can be surveyed mobile to low temperature.
Summary of the invention
A kind of fuel cell pile bipolar plates, including the heat-conducting metal fin of the two-sided metallic plate being etched with flow field and metallic plate edge.
Described metallic plate is rectangular metallic plate, and described heat-conducting metal fin is rectangle, and to be perpendicular to the metallic plate direction with heat-conducting metal fin junction for heat-conducting metal finned length direction, the length of described heat-conducting metal fin and the ratio of width are 5:1-15:1；The thickness of heat-conducting metal fin is less than or equal to plate thickness；The width of described heat-conducting metal fin and adjacent two heat-conducting metal spacings of fin from ratio be 1:4-1:2；The gross area of described heat-conducting metal fin and the ratio of metallic plate area are 1:4-1:1.5.
The limit that described heat-conducting metal fin is perpendicular in its metallic plate surrounding periphery being connected with metallic plate is arranged, and heat-conducting metal fin is in the same plane with metallic plate.
The material of described metallic plate is the material of described metallic plate is the one in the corrosion resistant plate of plating noble metal, the aluminium sheet of plating noble metal, the titanium plate of plating noble metal, the titanium alloy sheet of plating noble metal, the plating aluminium alloy plate of noble metal, nitriding corrosion resistant plate, nitriding aluminium sheet, nitriding titanium plate, nitriding titanium alloy sheet, nitriding aluminium alloy plate.Described noble metal is one or more the alloy in platinum, gold, silver, palladium, iridium.
Described heat-conducting metal fin is by one or more the alloy in copper, aluminum, gold, silver, nickel.
A kind of fuel cell pile of described bipolar plates, including bipolar plates alternately laminated successively and membrane electrode, and it is positioned at the end plate at assembly two ends after stacking, in fuel cell temperature-fall period, owing to the temperature difference of the different generation of rate of temperature fall drives steam to move to bipolar plates from membrane electrode between bipolar plates from membrane electrode, thus reducing the water content within membrane electrode, the present invention adopts the metal double polar plates with heat-conducting metal fin, by improving area of dissipation, improve its rate of temperature fall, increase the temperature difference of itself and membrane electrode, improve the difference in chemical potential of water in both, water is made to flow to pole plate from membrane electrode, solve storage and the starting problem of fuel cell pile under low temperature, when pile is when being not less than-20 DEG C of storages with startup, water content in described membrane electrode is not higher than 12g/cm2。
When pile is when-20 DEG C to-10 DEG C storages are with startup, the water content in described membrane electrode is 8-10mg/cm2.When pile is when-10 DEG C to 0 DEG C of storages are with startup, the water content in described membrane electrode is 9-11mg/cm2.Compared with prior art the present invention has low energy consumption, implements convenient etc. advantage.
Accompanying drawing explanation
Fig. 1 metal double polar plates schematic diagram with fin of the present invention；
1 is the metallic plate with metal fin, and 2 is flow field.
Metal double polar plates schematic diagram in Fig. 2 comparative example.
Detailed description of the invention
Embodiment 1
Fuel cell pile bipolar plates main body is gold-plated aluminium sheet, and gold-plated aluminium sheet is two-sided is etched with double; two serpentine flow, gold-plated aluminium sheet edge be welded with conduction copper fin.Gold-plated aluminium sheet be sized to 7.5cm × 5cm.The length of conduction copper fin is 1.4cm, and width is 0.16cm；The spacing of fin is 3mm.Conduction copper fin is perpendicular to gold-plated aluminium sheet surrounding periphery and arranges.
Adopt above-mentioned 5 bipolar plates and 5 commodity membrane electrodes (JM) to be alternately stacked rear two ends successively and assemble end plate formation fuel cell pile.
By out of service for the above-mentioned fuel cell pile being under normal running conditions and transfer to the cooling of-20 DEG C of condition borehole coolings, the water content when pile to ambient temperature, in test pile membrane electrode.Test result surface, the average moisture content in each membrane electrode is 9.6mg/cm2。
Embodiment 2
Fuel cell pile bipolar plates main body is gold-plated corrosion resistant plate, and it is two-sided is etched with point-like flow field, and edge is welded with heat conduction aluminum fin.Gold-plated corrosion resistant plate be sized to 7.5cm × 7.5cm.The length of heat conduction aluminum fin is 2cm, and width is 0.2cm；The spacing of fin is 3mm.Heat conduction aluminum fin is perpendicular to gold-plated aluminium sheet surrounding periphery and arranges.
Adopt above-mentioned 5 bipolar plates and 5 commodity membrane electrodes (JM) to be alternately stacked rear two ends successively and assemble end plate formation fuel cell pile.
By out of service for the above-mentioned fuel cell pile being under normal running conditions and transfer to the cooling of-10 DEG C of condition borehole coolings, the water content when pile to ambient temperature, in test pile membrane electrode.Test result surface, the average moisture content in each membrane electrode is 10.5mg/cm2。
Comparative example 1
Adopting gold-plated aluminium sheet (its edge is without conduction copper fin), as bipolar plates assembling fuel cell pile, bipolar plate flow field and size are all in the same manner as in Example 1.Adopt above-mentioned 5 bipolar plates and 5 commodity membrane electrodes (JM) to be alternately stacked rear two ends successively and assemble end plate formation fuel cell pile.
By out of service for the above-mentioned fuel cell pile being under normal running conditions and transfer to the cooling of-20 DEG C of condition borehole coolings, the water content when pile to ambient temperature, in test pile membrane electrode.Test result surface, the average moisture content in each membrane electrode is 12mg/cm2。
Comparative example 2
Bipolar plates and fuel cell pile are all identical with comparative example 1, by out of service for the above-mentioned fuel cell pile being under normal running conditions and transfer to the cooling of-10 DEG C of condition borehole coolings, and the water content when pile to ambient temperature, in test pile membrane electrode.Test result surface, the average moisture content in each membrane electrode is 12.3mg/cm2。
Claims (9)
1. a fuel cell pile bipolar plates, it is characterised in that: include the heat-conducting metal fin of the two-sided metallic plate being etched with flow field and metallic plate edge.
2. bipolar plates as claimed in claim 1, it is characterized in that: described metallic plate is rectangular metallic plate, described heat-conducting metal fin is rectangle, to be perpendicular to the metallic plate direction with heat-conducting metal fin junction for heat-conducting metal finned length direction, the length of described heat-conducting metal fin and the ratio of width are 5:1-15:1, and the thickness of heat-conducting metal fin is less than or equal to plate thickness；The width of described heat-conducting metal fin and adjacent two heat-conducting metal spacings of fin from ratio be 1:4-1:2；The gross area of described heat-conducting metal fin and the ratio of metallic plate area are 1:4-1:1.5.
3. bipolar plates as claimed in claim 1, it is characterised in that: the limit that described heat-conducting metal fin is perpendicular in its metallic plate surrounding periphery being connected with metallic plate is arranged, and heat-conducting metal fin is in the same plane with metallic plate.
4. bipolar plates as claimed in claim 1, it is characterised in that: the material of described metallic plate is the one in the corrosion resistant plate of plating noble metal, the aluminium sheet of plating noble metal, the titanium plate of plating noble metal, the titanium alloy sheet of plating noble metal, the plating aluminium alloy plate of noble metal, nitriding corrosion resistant plate, nitriding aluminium sheet, nitriding titanium plate, nitriding titanium alloy sheet, nitriding aluminium alloy plate.
5. bipolar plates as claimed in claim 4, it is characterised in that: described noble metal is one or more the alloy in platinum, gold, silver, palladium, iridium.
6. the bipolar plates as described in as arbitrary in claim 1-3, it is characterised in that: described heat-conducting metal fin is by one or more the alloy in copper, aluminum, gold, silver, nickel.
7. the fuel cell pile adopting the arbitrary described bipolar plates of claim 1-5, including bipolar plates alternately laminated successively and membrane electrode, and it is positioned at the end plate at assembly two ends after stacking, it is characterized in that: when pile is when being not less than-20 DEG C of storages with startup, the water content in described membrane electrode is not higher than 12mg/cm2。
8. the fuel cell pile of bipolar plates as claimed in claim 4, it is characterised in that: when pile is when-20 DEG C to-10 DEG C storages are with startup, the water content in described membrane electrode is 8-10mg/cm2。
9. the fuel cell pile of bipolar plates as claimed in claim 4, it is characterised in that: when pile is when-10 DEG C to 0 DEG C of storages are with startup, the water content in described membrane electrode is 9-11mg/cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778425.5A CN105742650B (en) | 2014-12-12 | 2014-12-12 | A kind of fuel cell pile bipolar plates and fuel cell pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778425.5A CN105742650B (en) | 2014-12-12 | 2014-12-12 | A kind of fuel cell pile bipolar plates and fuel cell pile |
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| Publication Number | Publication Date |
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| CN105742650A true CN105742650A (en) | 2016-07-06 |
| CN105742650B CN105742650B (en) | 2019-01-11 |
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| CN201410778425.5A Active CN105742650B (en) | 2014-12-12 | 2014-12-12 | A kind of fuel cell pile bipolar plates and fuel cell pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416568A (en) * | 2019-09-04 | 2019-11-05 | 北京久安通氢能科技有限公司 | Air-cooled (list) battery pile of heat pipe metal double polar plates, the vehicles and electronic equipment |
| CN111987332A (en) * | 2019-05-21 | 2020-11-24 | 中国科学院大连化学物理研究所 | Heat dissipation and preheating combined fuel cell stack |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050221131A1 (en) * | 2004-03-31 | 2005-10-06 | Shantanu Roy | Fuel cell device with varied active area sizes |
| CN1684294A (en) * | 2004-04-14 | 2005-10-19 | 上海神力科技有限公司 | Self heat radiation and self wetting fuel cell stack with high power density |
| CN101083329A (en) * | 2007-05-14 | 2007-12-05 | 华南理工大学 | Minisize highly-effective thermal self-circulation cooling system for fuel cell |
| CN101853949A (en) * | 2010-06-12 | 2010-10-06 | 新源动力股份有限公司 | Wind-radiating vehicular fuel cell |
| WO2013129815A1 (en) * | 2012-02-29 | 2013-09-06 | Halla Visteon Climate Control Corp. | Cooling-water heating type heater |
-
2014
- 2014-12-12 CN CN201410778425.5A patent/CN105742650B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050221131A1 (en) * | 2004-03-31 | 2005-10-06 | Shantanu Roy | Fuel cell device with varied active area sizes |
| CN1684294A (en) * | 2004-04-14 | 2005-10-19 | 上海神力科技有限公司 | Self heat radiation and self wetting fuel cell stack with high power density |
| CN101083329A (en) * | 2007-05-14 | 2007-12-05 | 华南理工大学 | Minisize highly-effective thermal self-circulation cooling system for fuel cell |
| CN101853949A (en) * | 2010-06-12 | 2010-10-06 | 新源动力股份有限公司 | Wind-radiating vehicular fuel cell |
| WO2013129815A1 (en) * | 2012-02-29 | 2013-09-06 | Halla Visteon Climate Control Corp. | Cooling-water heating type heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987332A (en) * | 2019-05-21 | 2020-11-24 | 中国科学院大连化学物理研究所 | Heat dissipation and preheating combined fuel cell stack |
| CN110416568A (en) * | 2019-09-04 | 2019-11-05 | 北京久安通氢能科技有限公司 | Air-cooled (list) battery pile of heat pipe metal double polar plates, the vehicles and electronic equipment |
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| CN105742650B (en) | 2019-01-11 |
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Effective date of registration: 20211130 Address after: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Patentee after: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Patentee after: Sun Gongquan Patentee after: Yang Linlin Patentee after: Sun Hai Address before: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Patentee before: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES |
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Effective date of registration: 20211216 Address after: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Patentee after: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Patentee after: Zhongke Jiayuan (Foshan) new energy partnership (limited partnership) Address before: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Patentee before: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Patentee before: Sun Gongquan Patentee before: Yang Linlin Patentee before: Sun Hai |
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Effective date of registration: 20211230 Address after: 528216 room 3, building D3, No. 1, Xiangda Road, Danzao logistics center, Danzao Town, Nanhai District, Foshan City, Guangdong Province (residence declaration) Patentee after: Zhongke Jiahong (Foshan) New Energy Technology Co.,Ltd. Address before: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Patentee before: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Patentee before: Zhongke Jiayuan (Foshan) new energy partnership (limited partnership) |