CN109728318A - A kind of vanadium cell highly conductive bipolar plates and its continuous processing device and method - Google Patents
A kind of vanadium cell highly conductive bipolar plates and its continuous processing device and method Download PDFInfo
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- CN109728318A CN109728318A CN201711034602.9A CN201711034602A CN109728318A CN 109728318 A CN109728318 A CN 109728318A CN 201711034602 A CN201711034602 A CN 201711034602A CN 109728318 A CN109728318 A CN 109728318A
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- bipolar plates
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- motherboard
- vanadium cell
- roll
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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
Abstract
The present invention relates to vanadium cell manufacturing field, specially a kind of vanadium cell highly conductive bipolar plates and its continuous processing device and method.The device is successively to have three-roller calendar, registration roller, heating and heat-insulating device and setting roll along bipolar plates motherboard approach axis, three-roller calendar is equipped with spray equipment, there are two spray equipments, it is located at the top of bipolar plates motherboard two sides, is respectively provided between upper roller and central roll and between central roll and lower roll.This method is bipolar plates motherboard by three-roller calendar and by the spray equipment that is arranged on three-roller calendar, and conductive coating is directly sprayed on bipolar plate surfaces in two upper side of bipolar plates setting spray gun, and by after heating and heat-insulating device by setting roll compression moulding.The present invention, in bipolar plate surfaces, forms the high conductive coating of even compact using conductive coating spray, and coating consistency is good, reduces bipolar plates and interelectrode contact resistance, improves the energy efficiency of battery.
Description
Technical field
The present invention relates to vanadium cell manufacturing field, the highly conductive bipolar plates of specially a kind of vanadium cell and its Continuous maching dress
It sets and method.
Background technique
Vanadium cell is the ideal energy-storage battery for solving the renewable energy large capacity energy storage such as wind energy, solar energy.Bipolar plates are
The critical component for separating two monocells is needed in mechanical strength, flexibility, the compatibility four of electric conductivity and electrode frame material
A aspect balance, is broadly divided into three kinds: hard graphite plate, flexible graphite plate, plasticity conductive plate.Hard graphite plate cost high texture
Crisp, with battery frame material without compatibility, sealing problem is prominent, does not adapt to fluid vanadium cell industrialized requirement completely, can not
Big (maximum 800mm × 800mm) is done, does not have also producer to be capable of providing corresponding plate at present.
Flexible graphite plate is manufactured using natural graphite lamination, the biggest problems are that: it is placed in electrolyte and is easy for a long time
Swelling, corner cracky, mechanical strength is inadequate, completely incompatible with electrode frame material, and sealing is difficult.And plasticity conductive plate, it leads
Electrically and mechanically intensity is relatively poor, can only meet short-term battery life, and to obtain high conductivity, high conduction
It is (such as: conventional extrusion process) difficult to realize that agent additive amount prepares batch.Therefore it is necessary to using a kind of new processing unit (plant)
And method prepares plasticity conductive plate, makes it while having high electric conductivity and good mechanical strength.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to propose a kind of highly conductive bipolar plates of vanadium cell and
Its continuous processing device and method form the high conductive coating of even compact, table using conductive coating spray in bipolar plate surfaces
Face good conductivity, coating layer thickness is easy to control, and two sides coating consistency is good, reduces bipolar plates and interelectrode contact resistance, improves
The energy efficiency of battery.
In order to achieve the above object, the technical solution of the present invention is as follows:
A kind of highly conductive bipolar plates of vanadium cell, the bipolar plates are the conductive coating of bipolar plates motherboard and its one or both sides
Composite construction, conductive coating are sprayed at bipolar plates motherboard for conductive coating and are formed；Wherein, conductive coating be resin, conductive filler,
The mixture of diluent and auxiliary agent composition, resin-oatmeal, conductive filler, diluent and auxiliary agent mass ratio be 1:(1~10): (3~
50): (0.02~0.2), resistivity is in 0.001~100 Ω cm.
The highly conductive bipolar plates of the vanadium cell, resin use polyvinyl resin, acrylic resin, polyvinyl chloride tree
One of rouge, acrylic resin, acrylonitrile-butadiene-styrene copolymer or more than one, granularity be 10 μm~600 μ
m；Conductive filler is one of carbon black, graphite, carbon fiber powder and metal powder, and partial size is 0.01mm~0.1mm；Diluent is
One of water, ethyl alcohol, solvent naphtha, acetone；Auxiliary agent is defoaming agent and levelling agent, and defoaming agent is that polyethers or type siloxane defoam
Agent, levelling agent are type siloxane levelling agent.
The highly conductive bipolar plates of the vanadium cell, bipolar plates motherboard is with a thickness of 0.3~5.0mm, bipolar plates master surface
Conductive coating with a thickness of 0.005~0.10mm.
The highly conductive bipolar plates of the vanadium cell, it is preferred that for bipolar plates motherboard with a thickness of 0.3~2.0mm, bipolar plates are female
The conductive coating of plate surface is with a thickness of 0.01~0.03mm.
The continuous processing device of the highly conductive bipolar plates of the vanadium cell, continuous processing device enter along bipolar plates motherboard
Successively there are three-roller calendar, registration roller, heating and heat-insulating device, setting roll and wrap-up in direction, and the side of three-roller calendar is set
There is spray equipment, spray equipment is located at bipolar plates motherboard one or both sides；
Spray equipment be one when, be located at one upper side of bipolar plates motherboard, be located at three-roller calendar upper roller and central roll it
Between；When spray equipment is two, it is located at two upper side of bipolar plates motherboard, is respectively provided at the upper roller and central roll of three-roller calendar
Between and central roll and lower roll between.
The continuous processing device of the highly conductive bipolar plates of the vanadium cell, continuous processing device independently use；Alternatively, even
Continuous processing unit (plant) is mounted on the output end of extruder and frame head apparatus, bipolar plates motherboard that extruder squeezes out and three-roller calendar
It is corresponding between upper roller and central roll.
The continuous processing device of the highly conductive bipolar plates of the vanadium cell, spray equipment have towards bipolar plates motherboard side
Spray gun, spray gun are provided with conductive coating, and spray gun is set on automatic spraying machine, are controlled by automatic spraying machine.
The continuous processing device of the highly conductive bipolar plates of the vanadium cell, upper roller, central roll and the lower roll of three-roller calendar
For diameter in 0.5m~1.0m, adjacent two rollers spacing is 0.5~3.0mm；The diameter of registration roller is in 0.3m~1.0m；Setting roll it is straight
For diameter in 0.3m~1.0m, two roller spacing are 0.5~3mm；The nozzle diameter of spray gun is 1.0~5.0mm.
The continuous processing device of the highly conductive bipolar plates of the vanadium cell, three-roller calendar are normal-temperature operation or heating behaviour
Make；Heating and heat-insulating device uses tunnel oven, and length is in 5~10m, temperature range≤300 DEG C.
The continuous process of the highly conductive bipolar plates of the vanadium cell, bipolar plates motherboard pass through three-roller calendar and lead to
The spray equipment being arranged on three-roller calendar is crossed, conductive coating is directly sprayed on bipolar plates both side surface, and passes through heating
By setting roll compression moulding after attemperator.
The invention has the advantages and beneficial effects that:
1, the high conductive coating of even compact being formed in bipolar plate surfaces using conductive coating spray, surface conductivity is good,
Avoid current powder spray easy to pollute, the disadvantages of bad dispersibility.
2, using new spraying process, spray gun is arranged above bipolar plates motherboard and is operated for selection, and two sides coating is consistent
Property it is good, reduce bipolar plates and interelectrode contact resistance, improve the energy efficiency of battery.Meanwhile avoiding current powder spray work
Spray head is arranged in selection two sides above and below bipolar plates in skill, so that two sides coating thickness variation is big up and down, lower side nozzle is spray coated
The disadvantages of easily being blocked in journey.
Detailed description of the invention
Fig. 1 is continuous processing device schematic diagram；
Fig. 2-Fig. 3 is spray equipment schematic diagram.
In figure, 1 extruder and frame head apparatus；2 three-roller calendars；3 spray equipments；4 registration rollers；5 heating and heat-insulating devices；6
Setting roll；7 traction devices；8 wrap-ups；9 spray guns；10 automatic spraying machines.
Specific embodiment
In the specific implementation process, apparatus of the present invention can be independently operated, also may be mounted at extruder squeeze out head it
Afterwards, bipolar plates motherboard is by three-roller calendar and the spray equipment by being arranged on three-roller calendar, on bipolar plates two sides
Conductive coating is directly sprayed on bipolar plate surfaces by side's setting spray gun, and by being pressed into after heating and heat-insulating device by setting roll
Type.
As shown in Figure 1, continuous processing device of the present invention specifically includes that extruder and frame head apparatus 1, three-roller calendar 2, spray
Coating device 3, registration roller 4, heating and heat-insulating device 5, setting roll 6, traction device 7, wrap-up 8 etc., specific structure is as follows:
Continuous processing device successively has three-roller calendar 2, registration roller 4, heating and thermal insulation dress along bipolar plates motherboard approach axis
5, setting roll 6 and wrap-up 8 are set, the side of three-roller calendar 2 is equipped with spray equipment 3.There are two spray equipments 3, respectively position
It in two upper side of bipolar plates motherboard, is respectively provided between the upper roller and central roll of three-roller calendar 2 and between central roll and lower roll, squeezes
It is corresponding between the output end of machine and frame head apparatus 1 and the upper roller of three-roller calendar 2 and central roll out.
As shown in Figure 1-Figure 3, spray equipment of the present invention mainly includes spray gun 9, automatic spraying machine 10, spray equipment 3 towards
There is spray gun 9 in bipolar plates motherboard side, and spray gun 9 is provided with conductive coating, and spray gun 9 is set on automatic spraying machine 10, by spraying automatically
Painting machine 10 controls.Wherein, the nozzle diameter of spray gun 9 is 1.0~5.0mm (preferably 2.5~5.0mm).
Wherein, the upper roller of three-roller calendar, central roll and lower roller diameter be in 0.5m~1.0m, and adjacent two rollers spacing is 0.5~
3mm；The diameter of registration roller is in 0.3m~1.0m；For the diameter of setting roll in 0.3m~1.0m, two roller spacing are 0.5~3mm；Spray gun
Nozzle diameter be 2.5~5mm.
The embodiment of the present invention is further described with reference to the accompanying drawing.
Embodiment 1
In the present embodiment, continuous processing device is as follows: three-roller calendar diameter is 0.6m, and spacing is 1mm, spray between three rollers
Coating device is individually positioned in bipolar plates motherboard two upper sides up and down, specially between upper roller and central roll and central roll and lower roll it
Between, spray tip diameter is 3.5mm.By partial size be 10 μm polyvinyl resin, partial size be 0.01mm graphite powder, water and auxiliary agent
The conductive coating that 1:9:20:0.02 in mass ratio is uniformly mixed is added to automatic spraying machine.Wherein, auxiliary agent is type siloxane
The mass ratio of defoaming agent and levelling agent is 1:1.Conductive coating is sprayed on bipolar plates master surface, control traction speed by spray gun
Degree, by 6m tunnel oven (temperature control at 270 DEG C), by setting roll, diameter 0.6m, spacing is between two rollers
0.9mm.To which obtaining bipolar plates overall thickness is 0.7mm, and both side surface coating layer thickness is respectively 0.10mm, and resistivity exists
0.15Ω·cm。
Bipolar plates manufactured in the present embodiment assemble 10KW vanadium cell, battery charge and discharge performance parameter are as follows: coulombic efficiency
97.0%, voltage efficiency 86.0%, energy efficiency 83.4%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 5.0%.
Embodiment 2
In the present embodiment, continuous processing device is as follows: three-roller calendar diameter is 0.7m, and spacing is 2mm, spray between three rollers
Coating device is individually positioned in bipolar plates motherboard two upper sides up and down, specially between upper roller and central roll and central roll and lower roll it
Between, spray tip diameter is 5mm.By partial size be 10 μm acrylic resin, partial size be 0.02mm carbon dust, dehydrated alcohol and help
The conductive coating that agent 1:8:30:0.1 in mass ratio is uniformly mixed is added to automatic spraying machine.Wherein, auxiliary agent is siloxanes
The mass ratio of class defoaming agent and levelling agent is 1:1.Conductive coating is sprayed on bipolar plates master surface, control traction by spray gun
Speed, by 9m tunnel oven (temperature control at 250 DEG C), by setting roll, diameter 0.5m, spacing is between two rollers
0.8mm.To which obtaining bipolar plates overall thickness is 0.7mm, and both side surface coating layer thickness is respectively 0.05mm, and resistivity is 0.1
Ω·cm。
Bipolar plates manufactured in the present embodiment assemble 10KW vanadium cell, battery charge and discharge performance parameter are as follows: coulombic efficiency
97.6%, voltage efficiency 85.6%, energy efficiency 83.5%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 4.6%.
Embodiment 3
In the present embodiment, continuous processing device is as follows: three-roller calendar diameter is 0.8m, and spacing is 3mm, spray between three rollers
Coating device is individually positioned in bipolar plates motherboard two upper sides up and down, specially between upper roller and central roll and central roll and lower roll it
Between, spray tip diameter is 4mm.By partial size be 20 μm polyvinyl resin, partial size be 0.03mm carbon fiber powder, acetone and help
The conductive coating that agent 1:7:15:0.05 in mass ratio is uniformly mixed is added to automatic spraying machine.Wherein, auxiliary agent is siloxanes
The mass ratio of class defoaming agent and levelling agent is 1:1.Conductive coating is sprayed on bipolar plates master surface, control traction by spray gun
Speed, by 7m tunnel oven (temperature control at 210 DEG C), by setting roll, diameter 0.6m, spacing is between two rollers
0.9mm.To which obtaining bipolar plates overall thickness is 0.86mm, and both side surface coating layer thickness is respectively 0.02mm, and resistivity exists
0.09Ω·cm。
Bipolar plates manufactured in the present embodiment assemble 10KW vanadium cell, battery charge and discharge performance parameter are as follows: coulombic efficiency
97.5%, voltage efficiency 86.2%, energy efficiency 84.0%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 5.2%.
Embodiment 4
In the present embodiment, continuous processing device is as follows: three-roller calendar diameter is 0.5m, and spacing is 1.5mm between three rollers,
Spray equipment is individually positioned in bipolar plates motherboard two upper sides up and down, specially between upper roller and central roll and central roll and lower roll it
Between, spray tip diameter is 4.5mm.By partial size be 30 μm acrylic resin, partial size be 0.01mm graphite powder, solvent naphtha and
The conductive coating that auxiliary agent 1:10:30:0.1 in mass ratio is uniformly mixed is added to automatic spraying machine.Wherein, auxiliary agent is silicon oxygen
The mass ratio of alkanes defoaming agent and levelling agent is 1:1.Conductive coating is sprayed on bipolar plates master surface by spray gun, control is led
Draw speed, by 10m tunnel oven (temperature control at 240 DEG C), by setting roll, diameter 0.8m, spacing between two rollers
For 1.0mm.To which obtaining bipolar plates overall thickness is 0.92mm, and both side surface coating layer thickness is respectively 0.04mm, and resistivity exists
0.05Ω·cm。
Bipolar plates manufactured in the present embodiment assemble 10KW vanadium cell, battery charge and discharge performance parameter are as follows: coulombic efficiency
97.4%, voltage efficiency 85.9%, energy efficiency 83.7%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 4.9%.
Claims (10)
1. a kind of highly conductive bipolar plates of vanadium cell, which is characterized in that the bipolar plates are bipolar plates motherboard and its one or both sides
Conductive coating composite construction, conductive coating is that conductive coating is sprayed at bipolar plates motherboard and is formed；Wherein, conductive coating is tree
Rouge, conductive filler, diluent and auxiliary agent mixture composition, resin-oatmeal, conductive filler, diluent and auxiliary agent mass ratio be 1:
(1~10): (3~50): (0.02~0.2), resistivity is in 0.001~100 Ω cm.
2. the highly conductive bipolar plates of vanadium cell described in accordance with the claim 1, which is characterized in that resin using polyvinyl resin,
One of acrylic resin, Corvic, acrylic resin, acrylonitrile-butadiene-styrene copolymer or it is a kind of with
On, granularity is 10 μm~600 μm；Conductive filler is one of carbon black, graphite, carbon fiber powder and metal powder, and partial size is
0.01mm~0.1mm；Diluent is one of water, ethyl alcohol, solvent naphtha, acetone；Auxiliary agent is defoaming agent and levelling agent, defoaming agent
For polyethers or type siloxane defoaming agent, levelling agent is type siloxane levelling agent.
3. the highly conductive bipolar plates of vanadium cell described in accordance with the claim 1, which is characterized in that bipolar plates motherboard is with a thickness of 0.3
~5.0mm, the conductive coating of bipolar plates master surface is with a thickness of 0.005~0.10mm.
4. the highly conductive bipolar plates of vanadium cell described in accordance with the claim 1, which is characterized in that preferred, bipolar plates motherboard is thick
Degree is 0.3~2.0mm, and the conductive coating of bipolar plates master surface is with a thickness of 0.01~0.03mm.
5. the continuous processing device of the highly conductive bipolar plates of vanadium cell, feature described in a kind of one of Claims 1-4 exist
In continuous processing device successively has three-roller calendar, registration roller, heating and heat-insulating device, sizing along bipolar plates motherboard approach axis
The side of roller and wrap-up, three-roller calendar is equipped with spray equipment, and spray equipment is located at bipolar plates motherboard one or both sides；
When spray equipment is one, it is located at one upper side of bipolar plates motherboard, is located between the upper roller of three-roller calendar and central roll；Spray
When coating is set to two, it is located at two upper side of bipolar plates motherboard, is respectively provided between the upper roller of three-roller calendar and central roll
And between central roll and lower roll.
6. the continuous processing device of the highly conductive bipolar plates of vanadium cell according to claim 5, which is characterized in that continuous to add
Tooling sets independent use；Alternatively, continuous processing device is mounted on the output end of extruder and frame head apparatus, extruder is squeezed out double
It is corresponding between pole plate motherboard and the upper roller of three-roller calendar and central roll.
7. the continuous processing device of the highly conductive bipolar plates of vanadium cell according to claim 5, which is characterized in that spraying dress
Setting has spray gun towards bipolar plates motherboard side, and spray gun is provided with conductive coating, and spray gun is set on automatic spraying machine, by spraying automatically
The control of painting machine.
8. the continuous processing device of the highly conductive bipolar plates of vanadium cell according to claim 7, which is characterized in that three roll-ins
For upper roller, central roll and the lower roller diameter of ray machine in 0.5m~1.0m, adjacent two rollers spacing is 0.5~3.0mm；The diameter of registration roller exists
0.3m~1.0m；For the diameter of setting roll in 0.3m~1.0m, two roller spacing are 0.5~3mm；The nozzle diameter of spray gun be 1.0~
5.0mm。
9. the continuous processing device of the highly conductive bipolar plates of vanadium cell according to claim 5, which is characterized in that three roll-ins
Ray machine is normal-temperature operation or heating operation；Heating and heat-insulating device uses tunnel oven, and length is in 5~10m, temperature range≤300
℃。
10. a kind of continuous process of the highly conductive bipolar plates of the vanadium cell using claim 5 described device, feature exist
In bipolar plates motherboard is by three-roller calendar and the spray equipment by being arranged on three-roller calendar, directly by conductive coating
Be sprayed on bipolar plates both side surface, and by after heating and heat-insulating device by setting roll compression moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034602.9A CN109728318B (en) | 2017-10-30 | 2017-10-30 | High-conductivity bipolar plate for vanadium battery and continuous processing device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034602.9A CN109728318B (en) | 2017-10-30 | 2017-10-30 | High-conductivity bipolar plate for vanadium battery and continuous processing device and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109728318A true CN109728318A (en) | 2019-05-07 |
| CN109728318B CN109728318B (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152578A (en) * | 2010-12-21 | 2011-08-17 | 上海林洋储能科技有限公司 | Method for preparing highly conductive multi-layered composite plate |
| CN102637881A (en) * | 2012-04-11 | 2012-08-15 | 朝阳华鼎储能技术有限公司 | Method for preparing electroconductive plastic bipolar plate for vanadium cell |
| CN102683723A (en) * | 2011-03-14 | 2012-09-19 | 中国科学院金属研究所 | Method for manufacturing high-conductivity conductive plastic bipolar plate for vanadium cell |
| CN103633336A (en) * | 2012-08-29 | 2014-03-12 | 中国科学院大连化学物理研究所 | Bipolar plate for liquid flow energy storage battery and preparation method |
| CN104638282A (en) * | 2015-02-04 | 2015-05-20 | 大连融科储能技术发展有限公司 | Method, system and method for processing bipolar plate of low-contact resistor and bipolar plate of low-contact resistor |
| CN107039665A (en) * | 2017-03-06 | 2017-08-11 | 周翔 | A kind of preparation method of composite dual-electrode plates used for all-vanadium redox flow battery |
-
2017
- 2017-10-30 CN CN201711034602.9A patent/CN109728318B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152578A (en) * | 2010-12-21 | 2011-08-17 | 上海林洋储能科技有限公司 | Method for preparing highly conductive multi-layered composite plate |
| CN102683723A (en) * | 2011-03-14 | 2012-09-19 | 中国科学院金属研究所 | Method for manufacturing high-conductivity conductive plastic bipolar plate for vanadium cell |
| CN102637881A (en) * | 2012-04-11 | 2012-08-15 | 朝阳华鼎储能技术有限公司 | Method for preparing electroconductive plastic bipolar plate for vanadium cell |
| CN103633336A (en) * | 2012-08-29 | 2014-03-12 | 中国科学院大连化学物理研究所 | Bipolar plate for liquid flow energy storage battery and preparation method |
| CN104638282A (en) * | 2015-02-04 | 2015-05-20 | 大连融科储能技术发展有限公司 | Method, system and method for processing bipolar plate of low-contact resistor and bipolar plate of low-contact resistor |
| CN107039665A (en) * | 2017-03-06 | 2017-08-11 | 周翔 | A kind of preparation method of composite dual-electrode plates used for all-vanadium redox flow battery |
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