Multi-stack fuel cell system and control method thereof, and vehicle

Abstract

The invention relates to the technical field of fuel cell control, in particular to a multi-stack fuel cell system and a control method thereof and a vehicle. The vehicle comprises a fuel cell system and an electric element, the system comprises a controller, a series power supply circuit or a parallel power supply circuit, a cooling water pipeline and an air supply pipeline, the cooling water pipeline is connected with each electric pile through each cooling branch, the air supply pipeline is connected with each electric pile through each air supply branch, and each air supply branch is provided with an electromagnetic air valve; control switches for respectively controlling the electric piles are arranged in the series power supply circuit or the parallel power supply circuit; the output end of the controller is connected with each electromagnetic air valve and each control switch, the controller controls the control switches and the electromagnetic air valves to start part of the electric piles, and the heat generated by the controller can be supplied for the rapid temperature rise of other electric piles, so that the rapid temperature rise of the fuel cell system is achieved, and the problems that the performance of the cell is reduced and the use requirements of users cannot be met due to the fact that the temperature rise time of the fuel cell is long and the starting is slow in the low-temperature environment are solved.

Description

technical field [0001] The invention relates to the technical field of fuel cell control, in particular to a multi-stack fuel cell system, a control method thereof, and a vehicle. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy through an electrochemical reaction. It has the advantages of high energy conversion efficiency and no greenhouse gas emissions. It is suitable for automobiles, power stations, aerospace and other fields. Fuel cells have an optimal reaction temperature. For example, the optimal reaction temperature of proton exchange membrane fuel cells is 70-90°C. It is of great significance for fuel cells to start quickly, reach the optimal reaction temperature, and achieve efficient operation. [0003] The fuel cell system consists of a stack module, an air supply system, a hydrogen supply system, a water and heat management system, and a control system. The...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stack fuel cell system and its control method, and a vehicle to solve the problem of fuel cell temperature rise time in a low temperature environment and slow start-up, which lead to battery performance degradation

By warming first and then heating, part of the stacks are heated up first, and finally achieve common heating, which realizes the rapid warm-up and start-up of fuel cell stacks, and solves the problem of fuel cell heating-up time and slow start-up in low-temperature environments. The performance of the battery is degraded and cannot meet the needs of users

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