Multi-stack integration device of fuel cell and working method of multi-stack integration device

Abstract

The invention discloses a multi-stack integration device of a fuel cell and a working method of the multi-stack integration device, and the multi-stack integration device comprises a first end plate, a first collector plate, a first electric stack, a second collector plate, a second end plate, a third collector plate, a second electric stack, a fourth collector plate, a third end plate, a fifth collector plate, a third electric stack, a sixth collector plate and a fourth end plate which are fixedly connected in sequence, the system further comprises a load, a main switch, a first valve, a second valve, a third valve, a fourth valve, a first single-pole double-throw switch and a second single-pole double-throw switch. The load is connected with the first collector plate through the main switch, and the load is connected with the sixth collector plate; the first single-pole double-throw switch is connected with the second collector plate, the third collector plate and the load, and the second single-pole double-throw switch is connected with the fourth collector plate, the fifth collector plate and the load. By adopting a simple circuit design, the service life of the galvanic pile is greatly prolonged, and the use cost of equipment is also greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, in particular to a multi-stack integrated device of fuel cells and a working method thereof. Background technique [0002] In the development system of new energy vehicles, fuel cell vehicles are an important part. Proton exchange membrane fuel cell is an electrochemical device that directly converts chemical energy into electrical energy, heat energy and water after reaction. It is not limited by the Carnot cycle and has high conversion efficiency. As long as there is enough fuel gas (mainly for hydrogen) and oxygen, it can run continuously for a long time. [0003] Existing fuel cell stacks are divided into several types of fuel cell stacks with different powers to deal with different application scenarios. Vehicles use medium-power fuel cell stacks, and large-scale logistics vehicles use high-power fuel cell stacks. [0004] In addition, even a domestic fuel cell vehicle needs to...

AI Technical Summary

Problems solved by technology

[0005] There are two solutions in the existing technology for different power distribution methods. One is to directly use a single high-power electric stack to meet the maximum power demand of the vehicle. The carrier is easily corroded, resulting in a decrease in the performance of the stack; another solution is to directly divide the fuel cell stack into several small stacks to operate together, and each small stack uses a common manifold to supply gas and coolant. The complex manifold design increases the design difficulty, and it is difficult to ensure that the distribution is completely uniform, and it will also lead to faster decay of the poorly distributed stack

The existing technology will not only reduce the performance of the stack quickly, but also increase the cost of additional components

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