| Summary: | The hybrid energy storage system composed of fuel cell, battery, and ultracapacitor holds significant potential in fuel cell vehicles. However, most of the current research only solely consider energy braking recovery or merely focus on energy management, with few conducting joint research on the two. To address the issues of short fuel cell lifespan, low energy braking recovery efficiency, and the complexity of overall vehicle power distribution and energy flow, this paper proposes a method for joint energy management and energy braking recovery of fuel cell vehicles based on fuzzy control and considering ultracapacitor. This approach integrates the energy braking recovery strategy with the energy management strategy. Through secondary development of the Advisor software and addition of an ultracapacitor module, modeling of energy braking recovery module and energy management module is carried out. On this basis, a fuzzy controller is designed to control the aforementioned energy braking recovery module and energy management module, enhancing the overall performance of the fuel cell vehicle. The proposed joint strategy can reduce hydrogen consumption by 16.59 % and 10.99 %, and reduce the fuel cell life decay rate by 58.68 % and 64.63 % under NEDC and UDDS conditions, respectively.
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