技术领域technical field
本发明属于燃料电池技术领域，涉及一种修复方法，特别是一种燃料电池石墨双极板的修复方法。The invention belongs to the technical field of fuel cells, and relates to a repair method, in particular to a repair method for graphite bipolar plates of fuel cells.
背景技术Background technique
随着氢能源项目的蓬勃发展，氢燃料电池的应用场景也不断的延申、扩展，产业化推进正在加速。氢燃料电池主要零部件之一的双极板目前分为两种：金属双极板与石墨双极板。石墨双极板经过一定时间运行后会产生串漏现象，最终影响燃料电池的使用寿命，这是石墨双极板生产过程中沉汁的环氧树脂慢慢脱离造成的。With the vigorous development of hydrogen energy projects, the application scenarios of hydrogen fuel cells are also continuously extended and expanded, and the promotion of industrialization is accelerating. Bipolar plates, one of the main components of hydrogen fuel cells, are currently divided into two types: metal bipolar plates and graphite bipolar plates. After a certain period of operation, the graphite bipolar plate will produce cross-leakage, which will eventually affect the service life of the fuel cell. This is caused by the slow detachment of the epoxy resin in the graphite bipolar plate production process.
经检索，目前专利未公开有燃料电池石墨双极板的修复方法。因此，针对上述问题，提出了一种燃料电池石墨双极板的修复方法，利用再次浸汁原理，将有微漏、串气的石墨双极板进行重新修复，让其能继续使用，大大延长的石墨双极板的使用寿命。After retrieval, the current patent does not disclose a repair method for fuel cell graphite bipolar plates. Therefore, in response to the above problems, a repair method for graphite bipolar plates of fuel cells is proposed. Using the principle of soaking juice again, the graphite bipolar plates with micro-leakage and outgassing are re-repaired so that they can continue to be used and greatly prolong the life of the fuel cell. The service life of the graphite bipolar plate.
发明内容Contents of the invention
本发明的目的是针对现有的技术存在上述问题，提出了一种燃料电池石墨双极板的修复方法，解决了现有燃料电池石墨双极板使用寿命短的问题。The object of the present invention is to solve the problem of short service life of the graphite bipolar plate of the existing fuel cell by proposing a repair method for the graphite bipolar plate of the fuel cell in view of the above-mentioned problems in the prior art.
本发明的目的可通过下列技术方案来实现：一种燃料电池石墨双极板的修复方法，其特征在于，包括以下步骤：The purpose of the present invention can be achieved through the following technical solutions: a repair method for fuel cell graphite bipolar plate, is characterized in that, comprises the following steps:
a、假电堆组装：将待修复的燃料电池石墨双极板安装在双极板修复装置中，按装堆要求组装形成假电堆，所用的电极是假电极，二头端板也是为假堆而设计的专用端板，实现空、水、氢三进三出；a. Dummy stack assembly: install the graphite bipolar plate of the fuel cell to be repaired in the bipolar plate repair device, and assemble it according to the stacking requirements to form a dummy stack. The electrodes used are dummy electrodes, and the two end plates are also dummy. The special end plate designed for stacking realizes three inputs and three outputs of air, water and hydrogen;
b、密封测试：管路及部件密封测试，检查密封确保无泄漏后安装完成；b. Sealing test: the sealing test of pipelines and components, check the sealing to ensure that there is no leakage, and then the installation is completed;
c、空气排空：在双极板修复装置的水箱中加入修复专用的环氧树脂，调节切换开关一和空气排出阀，对假电堆、管路一和管路二中的空气进行排出；c. Air evacuation: Add special epoxy resin for repairing to the water tank of the bipolar plate repairing device, adjust the switch 1 and the air discharge valve, and discharge the air in the false stack, pipeline 1 and pipeline 2;
d、水路运行：调节切换开关二进入水路运行模式，调节水路压力，开始运行，运行时间为5-10min；d. Waterway operation: adjust the switch 2 to enter the waterway operation mode, adjust the waterway pressure, and start running. The running time is 5-10min;
e、空气运行：空气入口调整好入口压力，将空气温度控制在60-90℃之间，调节切换开关二进入空气运行模式，开始运行，运行时间为5-10min；e. Air operation: adjust the inlet pressure of the air inlet, control the air temperature between 60-90°C, adjust the switch 2 to enter the air operation mode, start operation, and the operation time is 5-10min;
f、修复晾干：重复步骤d和步骤e各2-3次后将假电堆拆开，将待修复的燃料电池石墨双极板用工装晾开，自然晾干至24-48小时，修复完成。f. Repair and dry: Repeat step d and step e 2-3 times each, then disassemble the dummy stack, and dry the fuel cell graphite bipolar plate to be repaired with tooling, and let it dry naturally for 24-48 hours before repairing Finish.
采用以上流程，相比人工修复，更加高效，且修复的质量更加稳定。Using the above process is more efficient than manual restoration, and the repair quality is more stable.
所述的双极板修复装置包括水箱、水泵、空气加热箱和假电堆，所述的水泵进水口与水箱相连接，水泵出水口通过水路压力表与假电堆相连接，所述的假电堆通过管路二与水箱回路管相连接，所述的水箱回路管与水箱相连通，所述的假电堆通过空气压力表与空气加热箱出口相连结。The bipolar plate repair device includes a water tank, a water pump, an air heating tank and a dummy electric stack, the water inlet of the water pump is connected to the water tank, and the water outlet of the water pump is connected to the dummy electric stack through a water pressure gauge. The electric pile is connected with the water tank return pipe through pipeline two, and the water tank return pipe is connected with the water tank, and the false electric pile is connected with the outlet of the air heating tank through the air pressure gauge.
所述的假电堆按正常电极的尺寸制作，具有密封导流效果，采用电极为假电池，假电堆能容纳若干待修复石墨双极板。The dummy stack is made according to the size of normal electrodes, and has the effect of sealing and diverting. The electrodes are used as dummy batteries, and the dummy stack can accommodate several graphite bipolar plates to be repaired.
采用以上结构，假电堆将需要修复的石墨双极板按正常电堆的安装方法进行安装，与正常电堆不同的是：其中的电极为假电池，按正常电极的尺寸制作，能起到密封导流效果即可，端板具有氢、水、空端口即可，无需绝缘板、集流板等，比正常电堆简单许多。With the above structure, the fake stack will install the graphite bipolar plates that need to be repaired according to the installation method of the normal stack. The difference from the normal stack is that the electrodes in it are fake batteries, which are made according to the size of the normal electrodes, which can play a role. The effect of sealing and diversion is enough, and the end plate only needs to have hydrogen, water, and air ports, without insulating plates, collector plates, etc., which is much simpler than normal stacks.
所述的水路压力表与空气压力表之间设置有切换开关。A switch is provided between the waterway pressure gauge and the air pressure gauge.
采用以上结构，切换开关能用于切换管路流向，使水路、空气路按设计的走向流动。With the above structure, the switch can be used to switch the flow direction of the pipeline, so that the waterway and the airway flow according to the designed direction.
所述的空气加热箱通过电线一与温度控制箱电相连。The air heating box is electrically connected with the temperature control box through wire one.
采用以上结构，温度控制箱用于调节进空气的温度而配置的，用于调节进堆的空气温度。With the above structure, the temperature control box is configured to adjust the temperature of the incoming air, and is used to adjust the temperature of the air entering the stack.
所述的水泵出水口还通过管路一与假电堆相连接，管路一上设置有切换开关一和空气排出阀。The water outlet of the water pump is also connected to the dummy stack through pipeline one, and the pipeline one is provided with a switch one and an air discharge valve.
所述的水泵通过电线二与水泵变频器电相连，水泵变频器用于调节水泵的转速，使水路达到设定压力。The water pump is electrically connected to the water pump frequency converter through the wire 2, and the water pump frequency converter is used to adjust the speed of the water pump to make the waterway reach the set pressure.
所述的水箱上设置有液位可视窗。The water tank is provided with a liquid level viewing window.
采用以上结构，液位可视窗作为观察水箱内液位之用，保障水箱里的水量充足，随时补充。With the above structure, the liquid level viewing window is used to observe the liquid level in the water tank to ensure that the water in the water tank is sufficient and can be replenished at any time.
所述的液位可视窗采用透明PVC管，透明PVC管的上部和下部均和水箱相连通。The liquid level viewing window adopts a transparent PVC pipe, and the upper and lower parts of the transparent PVC pipe are connected with the water tank.
所述的水箱上开设有用于加水的水箱入口。The water tank is provided with a water tank inlet for adding water.
所述的水泵和水路压力表采用不锈钢材质，使用过程中具有耐高温、耐腐蚀、无析出离子的效果。The water pump and waterway pressure gauge are made of stainless steel, and have the effects of high temperature resistance, corrosion resistance and no ion precipitation during use.
本发明的工作原理如下：让环氧树脂加入水箱进行循环后用热空气吹扫出多余的环氧树脂，加速固化，从而达到恢复密封的效果，利用再次浸汁原理，将有微漏、串气的石墨双极板进行重新修复，完成燃料电池石墨双极板的修复，让其能继续使用，大大延长的石墨双极板的使用寿命。The working principle of the present invention is as follows: put the epoxy resin into the water tank for circulation, and then use hot air to blow out the excess epoxy resin to accelerate the curing, so as to achieve the effect of restoring the seal. The gas graphite bipolar plate is repaired to complete the repair of the graphite bipolar plate of the fuel cell, so that it can continue to be used, and the service life of the graphite bipolar plate is greatly extended.
与现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
1、解决了现有燃料电池石墨双极板使用寿命短的问题，大大提高了燃料电池石墨双极板的使用寿命。1. Solve the problem of short service life of the graphite bipolar plate of the existing fuel cell, and greatly improve the service life of the graphite bipolar plate of the fuel cell.
2、相比人工修复，更加高效，且修复的质量更加稳定。2. Compared with manual repair, it is more efficient and the repair quality is more stable.
附图说明Description of drawings
图1是本发明的工艺流程图。Fig. 1 is a process flow diagram of the present invention.
图2是本发明的平面结构示意图。Fig. 2 is a schematic plan view of the present invention.
图3是本发明的立体结构示意图。Fig. 3 is a schematic diagram of the three-dimensional structure of the present invention.
图4是本发明另一视角的立体结构示意图。Fig. 4 is a schematic perspective view of the three-dimensional structure of the present invention from another perspective.
图5是本发明另一视角的平面结构示意图。Fig. 5 is a schematic plan view of another perspective of the present invention.
图中，1、液位可视窗；2、水箱；3、水泵变频器；4、水箱回路管；5、空气排出阀；6、切换开关一；7、管路一；8、假电堆；9、管路二；10、水路压力表；11、空气压力表；12、切换开关二；13、温度控制箱；14、电线一；15、空气加热箱出口；16、空气加热箱；17、水箱入口；18、氢进出口；19、水进出口；20、空进出口；24、电线二；25、水泵；26、空气入口；27、切换开关三。In the figure, 1. Liquid level viewing window; 2. Water tank; 3. Water pump inverter; 4. Water tank circuit pipe; 5. Air discharge valve; 6. Switch one; 7. Pipeline one; 9. Pipeline two; 10. Waterway pressure gauge; 11. Air pressure gauge; 12. Switch two; 13. Temperature control box; 14. Wire one; 15. Air heating box outlet; 16. Air heating box; 17. Water tank inlet; 18. Hydrogen import and export; 19. Water import and export; 20. Air inlet and outlet; 24. Wire two; 25. Water pump; 26. Air inlet; 27. Switch three.
具体实施方式Detailed ways
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
如图1-5所示，一种燃料电池石墨双极板的修复方法，在本实施例中，包括以下步骤：As shown in Figure 1-5, a kind of repair method of fuel cell graphite bipolar plate, in this embodiment, comprises the following steps:
a、假电堆组装：将待修复的燃料电池石墨双极板安装在双极板修复装置中，按装堆要求组装形成假电堆8，所用的电极是假电极，二头端板也是为假堆而设计的专用端板，实现空、水、氢三进三出；在本实施例中，采用假电堆组装，显著降低成本，同时组装简便；a. Dummy stack assembly: install the graphite bipolar plate of the fuel cell to be repaired in the bipolar plate repair device, and assemble it according to the stacking requirements to form a dummy stack 8. The electrodes used are dummy electrodes, and the two end plates are also for The special end plate designed for the dummy stack realizes three inputs and three outputs of air, water and hydrogen; in this embodiment, a dummy stack is used to assemble, which significantly reduces the cost and is easy to assemble;
b、密封测试：管路及部件密封测试，检查密封确保无泄漏后安装完成；b. Sealing test: the sealing test of pipelines and components, check the sealing to ensure that there is no leakage, and then the installation is completed;
c、空气排空：在双极板修复装置的水箱2中加入修复专用的环氧树脂，调节切换开关一6和空气排出阀5，对假电堆8、管路一7和管路二9中的空气进行排出；c. Air emptying: Add special epoxy resin for repair in the water tank 2 of the bipolar plate repair device, adjust the switch one 6 and the air discharge valve 5, and adjust the dummy stack 8, pipeline one 7 and pipeline two 9 The air in the air is discharged;
d、水路运行：调节切换开关二12进入水路运行模式，调节水路压力，开始运行，运行时间为5-10min；d. Waterway operation: adjust the switch 2 12 to enter the waterway operation mode, adjust the waterway pressure, start running, and the running time is 5-10min;
e、空气运行：空气入口26调整好入口压力，将空气温度控制在60-90℃之间，调节切换开关二12进入空气运行模式，开始运行，运行时间为5-10min；e. Air operation: adjust the inlet pressure at the air inlet 26, control the air temperature between 60-90°C, adjust the switch 2 12 to enter the air operation mode, start operation, and the operation time is 5-10min;
f、修复晾干：重复步骤d和步骤e各2-3次后将假电堆8拆开，将待修复的燃料电池石墨双极板用工装晾开，自然晾干至24-48小时，修复完成，在本实施例中，工装采用燃料电池石墨双极板专用工装。f. Repairing and drying: Repeat step d and step e 2-3 times each, then disassemble the dummy stack 8, and dry the fuel cell graphite bipolar plate to be repaired with tooling, and let it dry naturally for 24-48 hours. After the repair is completed, in this embodiment, the tooling adopts the special tooling for graphite bipolar plates of fuel cells.
采用以上流程，相比人工修复，更加高效，且修复的质量更加稳定。Using the above process is more efficient than manual restoration, and the repair quality is more stable.
如图2-5所示，双极板修复装置包括水箱2、水泵25、空气加热箱16和假电堆8，水泵25进水口与水箱2相连接，水泵25出水口通过水路压力表10与假电堆8相连接，假电堆8通过管路二9与水箱回路管4相连接，水箱回路管4与水箱2相连通，假电堆8通过空气压力表11与空气加热箱出口15相连结。As shown in Figure 2-5, the bipolar plate repair device includes a water tank 2, a water pump 25, an air heating tank 16 and a dummy stack 8. The water inlet of the water pump 25 is connected to the water tank 2, and the water outlet of the water pump 25 is connected to the water pressure gauge 10 The dummy stack 8 is connected, the dummy stack 8 is connected to the water tank return pipe 4 through the pipeline 2 9, the water tank return pipe 4 is connected to the water tank 2, and the dummy stack 8 is connected to the outlet 15 of the air heating tank through the air pressure gauge 11 link.
假电堆8按正常电极的尺寸制作，具有密封导流效果，采用电极为假电池，假电堆8能容纳若干待修复石墨双极板。The dummy stack 8 is made according to the size of the normal electrodes, and has the effect of sealing and guiding. The electrodes are used as dummy batteries, and the dummy stack 8 can accommodate a number of graphite bipolar plates to be repaired.
采用以上结构，假电堆8将需要修复的石墨双极板按正常电堆的安装方法进行安装，与正常电堆不同的是：其中的电极为假电池，按正常电极的尺寸制作，能起到密封导流效果即可，端板具有氢、水、空端口即可，无需绝缘板、集流板等，比正常电堆简单许多。Adopt the above structure, the graphite bipolar plate that needs to be repaired is installed according to the installation method of normal electric stack by false electric pile 8, is different from normal electric pile: the electrode wherein is false battery, is made according to the size of normal electrode, can play It is only necessary to achieve the sealing and diversion effect, and the end plate only needs to have hydrogen, water, and air ports, without the need for insulating plates, collector plates, etc., which is much simpler than normal stacks.
水路压力表10与空气压力表11之间设置有切换开关。A toggle switch is arranged between the waterway pressure gauge 10 and the air pressure gauge 11 .
采用以上结构，切换开关能用于切换管路流向，使水路、空气路按设计的走向流动。With the above structure, the switch can be used to switch the flow direction of the pipeline, so that the waterway and the airway flow according to the designed direction.
空气加热箱16通过电线一14与温度控制箱13电相连。The air heating box 16 is electrically connected with the temperature control box 13 by a wire one 14 .
采用以上结构，温度控制箱13用于调节进空气的温度而配置的，用于调节进堆的空气温度。With the above structure, the temperature control box 13 is configured for adjusting the temperature of the incoming air, and is used for adjusting the temperature of the air entering the stack.
水泵25出水口还通过管路一7与假电堆8相连接，管路一7上设置有切换开关一6和空气排出阀5。The water outlet of the water pump 25 is also connected with the dummy stack 8 through a pipeline one 7, and the pipeline one 7 is provided with a switch one 6 and an air discharge valve 5.
水泵25通过电线二24与水泵变频器3电相连，水泵变频器3用于调节水泵25的转速，使水路达到设定压力。The water pump 25 is electrically connected with the water pump frequency converter 3 through the wire 2 24, and the water pump frequency converter 3 is used to adjust the speed of the water pump 25 so that the waterway reaches the set pressure.
水箱2上设置有液位可视窗1。The water tank 2 is provided with a liquid level viewing window 1 .
采用以上结构，液位可视窗1作为观察水箱2内液位之用，保障水箱2里的水量充足，随时补充。With the above structure, the liquid level viewing window 1 is used to observe the liquid level in the water tank 2 to ensure that the water in the water tank 2 is sufficient and can be replenished at any time.
液位可视窗1采用透明PVC管，透明PVC管的上部和下部均和水箱2相连通。The liquid level viewing window 1 adopts a transparent PVC pipe, and the upper and lower parts of the transparent PVC pipe are connected with the water tank 2 .
水箱2上开设有用于加水的水箱入口17。The water tank 2 is provided with a water tank inlet 17 for adding water.
水泵25和水路压力表10采用不锈钢材质，使用过程中具有耐高温、耐腐蚀、无析出离子的效果。The water pump 25 and the waterway pressure gauge 10 are made of stainless steel, which have the effects of high temperature resistance, corrosion resistance and no ion precipitation during use.
本发明的工作原理如下：让环氧树脂加入水箱2进行循环后用热空气吹扫出多余的环氧树脂，加速固化，从而达到恢复密封的效果，利用再次浸汁原理，将有微漏、串气的石墨双极板进行重新修复，完成燃料电池石墨双极板的修复，让其能继续使用，大大延长的石墨双极板的使用寿命。The working principle of the present invention is as follows: add epoxy resin to the water tank 2 for circulation, and then use hot air to blow out excess epoxy resin to accelerate curing, thereby achieving the effect of restoring the seal. The exhausted graphite bipolar plate is repaired to complete the repair of the graphite bipolar plate of the fuel cell, so that it can continue to be used, greatly extending the service life of the graphite bipolar plate.
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310264205.XACN116454305A (en) | 2023-03-19 | 2023-03-19 | Repairing method of graphite bipolar plate of fuel cell |
| Application Number | Priority Date | Filing Date | Title |
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| CN202310264205.XACN116454305A (en) | 2023-03-19 | 2023-03-19 | Repairing method of graphite bipolar plate of fuel cell |
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| CN116454305Atrue CN116454305A (en) | 2023-07-18 |
| Application Number | Title | Priority Date | Filing Date |
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| CN202310264205.XAPendingCN116454305A (en) | 2023-03-19 | 2023-03-19 | Repairing method of graphite bipolar plate of fuel cell |
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