High power density hydrogen fuel cell power management integrated system

By designing a high-power density hydrogen fuel cell power management integrated system, the problems of unbalanced battery pack voltage and fixed load increase strategies during startup and operation of the hydrogen fuel cell system are solved, and dynamic adjustment of FCU and DCDC converter parameters is achieved, improving system performance and reliability.

CN119208673BActive Publication Date: 2025-03-28LUAN ZHONGKEMEIYIWA NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202411375518.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2025-03-28
Estimated Expiration
2044-09-30

AI Technical Summary

Technical Problem

High-power density hydrogen fuel cell systems lack effective power management strategies during startup and operation, resulting in unbalanced battery voltage, degraded performance, and even battery damage. The prior art adopts a fixed strategy when load increases, fails to efficiently integrate FCU and DCDC converter functions, and does not dynamically adjust according to current, voltage and temperature changes.

Method used

A high-power density hydrogen fuel cell power management integrated system is designed, including a precharge strategy implementation module, a start strategy implementation module, a monitoring and early warning strategy module and a performance evaluation generation module. The system detects and balances the battery pack voltage, monitors and analyzes current, voltage and temperature changes in real time, and dynamically adjusts the parameters of FCU and DCDC converters to achieve efficient adaptation of load changes.

Benefits of technology

By dynamically adjusting the parameters of FCU and DCDC converters, the performance and reliability of the hydrogen fuel cell system during startup and operation are improved, performance degradation and damage caused by unbalanced battery voltage is avoided, and the efficiency and life of the overall system are improved.

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Abstract

The present invention discloses a high power density hydrogen fuel cell power management integrated system, which integrates FCU\VCU\BMS\DCDC\PDU functions. After receiving a pre-charging strategy completion signal, the present invention gradually increases the load of the fuel cell according to a preset rate, monitors the changes in VCU energy demand, current, voltage and temperature in real time, and dynamically adjusts the fuel cell unit FCU, DCDC converter and battery charging and discharging BMS parameters according to the analysis results to adapt to load changes. This solves the problem that the prior art often adopts a fixed strategy for load increase at startup, does not efficiently integrate the VCU power response, FCU function, DCDC converter function and battery charging and discharging management BMS function, and dynamically adjusts the FCU function and DCDC converter function according to the current, voltage and temperature changes during the load increase process, and solves the problem of stack protection discharge point.
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