Hydrogen fuel vehicle is one of the main technical paths for the development of new energy vehicles in China.To a certain extent, it avoids the short charging plate of pure tram and becomes the industry direction complementary to lithium battery vehicles. Moreover, it is considered as the "ultimate goal" of the development of new energy vehicles because of its strong endurance, low noise, zero emission and other advantages.

　 Hydrogen-fueled vehicle mainly consists of fuel cell system (including fuel cell reactor, air compressor, etc.), auxiliary power battery, hydrogen storage device, drive motor and power control unit.Fuel cell is the main power source of hydrogen-fueled vehicles and the key factor affecting the performance of fuel vehicles.

　　 Fuel cell is an efficient power generation device which directly converts chemical energy of fuel into electric energy by electrochemical reaction without burning fuel. It mainly consists of end plate, insulating plate, collector, single cell (including bipolar plate and MEA).A short reactor consists of a combination of screw and end plate compression forces between the components that act as a support, collect current, provide a passage for coolant, separate oxidizers and reducing agents in the fuel cell.

　　 Classification of bipolar plates for hydrogen fuel cells

　　 The common bipolar plates of hydrogen fuel cell are graphite bipolar plate, metal bipolar plate and composite bipolar plate, which have different advantages.

　　 graphite bipolar plate

　　 The preparation method of graphite plate machining is mainly used, which has good chemical stability in electrochemical environment, high conductivity and good thermal conductivity. At present, it is the most widely used method in the research and application of proton exchange membrane fuel cell.

　 Metal bipolar plate

　 Stamping is made of stainless steel, titanium alloy, aluminium alloy, etc., which has the advantages of high electrical conductivity, low cost, various process methods and high mechanical strength.Metal bipolar plates are more suitable for mass production in terms of performance and cost.

　 Composite bipolar plate

　 Composite bipolar plates can be divided into multi-layer composite type and composite type, with the advantages of good electrical and mechanical properties, strong corrosion resistance and light quality.

　 Welding Method of Bipolar Plate for Hydrogen Energy Vehicle Fuel Cell

　 Bipolar plate welding diverter area welding and sealing area welding, the corresponding materials are mostly metal and composite plates, single material thickness distribution between 0.05mm to 0.3mm for welding.Laser welding bipolar plates can be classified according to laser output, laser, welding joint, etc.

　　 Laser welding bipolar plates can be generally divided into pulse welding and continuous welding according to laser output mode.

　　 Laser welding bipolar plates can generally be divided into QCW welding, Mopa welding and single mode welding according to laser classification.

    Laser welding bipolar plates can generally be divided into ejector welding and mirror welding according to the classification of welding joints.

　　 Welding case for hydrogen fuel cell

　 Bipolar plate welding needs to consider many factors such as sealing, robustness, consistency, durability, flatness and so on. It requires extremely strict welding requirements.Win-win laser has been persisting in technological innovation in the field of laser welding. With independent intellectual property rights and the core technology in the field of laser welding, Win-win laser provides strong guarantee for welding solutions of hydrogen energy fuel cell and has many high-quality products.

 Hydrogen fuel cell welding case.

　 Reactor strap welder

　 The equipment consists of servo pressure mechanism, PLC control system, laser, welding workbench, water cooler, smoke purifier, etc.

　　 Process flow of equipment:

　    Binding material→ Reactor Feeding→ Start button→ Fixture fixture→ Compression reactor→ Bending of steel strip→ Welded steel strip→ Unclipping fixture→ Stack blanking

　 Equipment advantages and features:

1. Manual feeding and unloading, automatic forming of moving positioning strap of workpiece;

2. Auto-focus, precise positioning, fast welding speed, good uniformity, beautiful welding seam and stable performance are adopted;

3. Full-range pressure monitoring;

4. The single-machine modular design is flexible and flexible, and can also be used with automatic production line.

5. The equipment covers a small area, consumables are small, the maintenance cost is low and the procedure operation is simple.

　 Reactor automatic binding welder

　 The equipment consists of servo pressure mechanism, PLC control system, laser welding machine, belt conveyor, reactor conveyor, water cooler, smoke purifier, etc.

　 Process flow of equipment:

　　 Binding material→ Reactor Feeding→ Start button→ Fixture fixture→ Compression reactor→ Bending of steel strip→ Welded steel strip→ Unclipping fixture→ Stack blanking

　 Equipment advantages and features:

1. Intelligent mechanisms such as strap conveyor mechanism, stack conveyor vehicle and stack tooling developed by UW are adopted to improve the automation and stability of the equipment;

2. Single machine modular design, flexible and flexible, and can also be used with automatic production line;

3. Industrial monitoring system is configured to monitor the welding process in real time;

4. Simple operation and convenient maintenance.

　 Bipolar plate double station welding machine

　 The equipment is composed of servo pressurizing mechanism, PLC control system, laser, welding workbench, chiller, smoke purifier, etc.

　 Equipment process flow

　　 Plate loading→ Fixture fixing→ Start button→ Visual positioning→ Welding plate→ Loosen the clamp→ Plate blanking

 Equipment advantages and characteristics

1. Duplex welding is adopted, which has high production efficiency and small floor area;

2. Single machine modular design, flexible and flexible, and can also be used with automatic production line;

3. Industrial monitoring system is configured to monitor the welding process in real time;

4. High reliability tooling clamping design to ensure welding consistency;

　 Stack assembly line

　 The equipment is mainly composed of electric reactor press, laser welding machine, electric reactor transport vehicle, chiller, smoke purifier, electric reactor air tightness detector, turnover blanking machine, AJV flow transfer vehicle, etc.

　　 Equipment process flow

　 Bipolar plate feeding→ Scan code→ Stacking and pressing→ Automatic binding of stack steel strip→ Automatic welding of stack steel strip→ Stack air tightness inspection→ Stack output

　　 Equipment advantages and characteristics

1. Automatic loading and unloading;

2. High efficiency, less consumables, low maintenance cost and simple program operation;

3. Industrial monitoring system is configured to monitor the welding process in real time;

4. Automatic post welding inspection;

5. Information parameter tracing function;

6. Special fixture to ensure high welding quality.

　 In recent years, with the support of national industrial policies, the fuel cell industry has been developing continuously. The company has arranged in advance in the fuel cell industry, established cooperation with many well-known enterprises in the industry, and will continue to develop products that can help customers achieve their goals in the future, so as to create value for the new energy industry.