Electric pile end plate with gas pressure buffering and dehumidifying functions

Abstract

The invention discloses an electric pile end plate with gas pressure buffering and dehumidifying functions. A first end plate is of a hollow structure, and an inner cavity of the first end plate is partitioned into a fuel gas side gas-inlet buffering area and an oxidant gas side gas-inlet buffering area by a partition plate; and a fuel gas side humidifying water supplementing opening and an oxidant gas side humidifying water supplementing opening are further formed in the side walls of the fuel gas side gas-inlet buffering area and the oxidant gas side gas-inlet buffering area correspondinglyand used for filling the fuel gas side gas-inlet buffering area and the oxidant gas side gas-inlet buffering area with humidifying water correspondingly, the heights of the water levels of the humidifying water on the two sides are larger than the height of a fuel gas end plate inlet and the height of an oxidant gas end plate inlet correspondingly. The electric pile end plate has the gas pressurebuffering and dehumidifying functions, the humidity of gas entering an electric pile is adjusted and changed through design of the buffer areas and the humidifying water temperature, the performanceof the electric pile is exerted advantageously, the service life of the electric pile is prolonged advantageously, and thus the electric pile operates more stably and is longer in service life.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to an end plate of a fuel cell stack. Background technique [0002] The fuel cell is a device that converts the chemical energy of hydrogen into electrical energy. Its advantages are that the product is water, zero emission and no pollution, low noise, and high conversion efficiency. The working temperature can operate in low temperature environment, it is the first choice for mobile power supply, base station power supply and fixed power supply. A fuel cell is composed of membrane electrodes, bipolar plates, collector plates, end plates and fasteners. [0003] Due to the low voltage of a single polymer membrane fuel cell, in practical applications, multiple battery cells are stacked together and connected in series to form a stack. The current fuel cell system for fuel vehicles is basically composed of a fuel cell stack, a humidifier, a gas buffer tank, a starting ...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the current fuel cell system solutions: 1. Humidifiers and gas buffer tank accessories are expensive, which is one of the main reasons for the high cost of fuel cell systems; 2. Existing commercial humidifiers and gas buffer tanks Strange shape and poor integration with other accessories are not conducive to the miniaturization and compactness of the entire fuel cell system; 3. Commercial humidifiers and gas buffer tanks are large in size, which is one of the main reasons for the large volume and low power density of the fuel cell system

In general, due to the large number of accessories and complex shapes, the fuel cell system is large in size and low in volume specific power density, which limits the promotion and application of fuel cells in the field of vehicles.

Images