CN-122025702-A - Fuel cell control management system and method thereof

CN122025702ACN 122025702 ACN122025702 ACN 122025702ACN-122025702-A

Abstract

The invention provides a fuel cell control management system and a method thereof, which can simplify a system architecture, realize the optimal management of a cell stack state and ensure the real-time performance and the working reliability, and comprise a hydrogen storage module, a cell stack heat dissipation module, a DC/DC module, a motor driving module and a FCU control module, wherein the hydrogen storage module is connected with the fuel cell stack and is used for providing hydrogen, the cell stack heat dissipation module is connected with the fuel cell stack and is used for dissipating heat of the fuel cell stack and heating the hydrogen storage module, the DC/DC module is connected with the electric fuel cell stack and a lithium battery and is used for realizing voltage-current conversion, the motor driving module is connected with the DC/DC module and the lithium battery and is used for realizing the motor forward and backward rotation control based on the power supply mode of the DC/DC module and the lithium battery, and the FCU control module is connected with the hydrogen storage module and the DC/DC module and is used for monitoring the hydrogen allowance of the hydrogen storage module, realizing power supply control and the DC/DC module control and realizing low hydrogen allowance early warning.

Inventors

DONG ZHEN
ZHANG XIANG
ZHOU HONGLEI
GUO XIAOYU

Assignees

苏州溯驭技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (10)

1. A fuel cell control management system is characterized by comprising: A hydrogen storage module connected with the fuel cell stack for providing hydrogen; the electric pile heat dissipation module is connected with the fuel electric pile and the hydrogen storage module and is used for dissipating heat of the fuel electric pile and heating the hydrogen storage module; the DC/DC module is connected with the electric fuel cell stack and the lithium battery and is used for realizing voltage-current conversion; The motor driving module is connected with the DC/DC module and the lithium battery and is used for realizing forward and reverse rotation control of the motor based on the power supply mode of the DC/DC module and the lithium battery; The FCU control module is connected with the hydrogen storage module and the DC/DC module, and is used for monitoring the hydrogen residual quantity of the hydrogen storage module, realizing power supply control and DC/DC module control and realizing low hydrogen residual quantity early warning.
2. The fuel cell control and management system of claim 1, further comprising an IOT module connected with the FCU control module for receiving a hydrogen gas remaining amount low early warning signal output by the FCU control module and realizing early warning response.
3. A fuel cell control management method is characterized by comprising the following steps: S1, comparing the obtained fuel cell stack single-chip voltage with a first voltage threshold V1 in a system running state, and if the fuel cell stack single-chip voltage is larger than the first voltage threshold V1, performing a step S2; S2, pulling current at a pulling speed N1 by the system until the output power of the DC/DC module reaches the target power P, and then performing step S3; S3, the system operates at rated power, and compares the temperature of the fuel cell stack with a first temperature threshold T1 during operation, if the temperature is greater than the first temperature threshold T1, the system carries out current load reduction and returns to the step S2, and if the temperature is less than the first temperature threshold T1, the step S4 is carried out; S4, acquiring the hydrogen residual SOC of the hydrogen storage module through the FCU control module, comparing the hydrogen residual SOC with a hydrogen residual threshold value N, continuously charging the lithium battery with rated power if the hydrogen residual SOC is larger than the hydrogen residual threshold value N until the voltage of the lithium battery is larger than a second voltage threshold value V2, entering a shutdown stage by the system at the moment, and performing hydrogen residual low early warning if the hydrogen residual SOC is smaller than the hydrogen residual threshold value N.
4. A fuel cell control and management method according to claim 3, wherein in said step S1, if the fuel cell stack monolithic voltage is smaller than the first voltage threshold V1, the system enters a standby state and operates at a standby power P1.
5. The method of controlling and managing a fuel cell according to claim 4, wherein the first voltage threshold V1 is in a range of 0.55V to 0.65V, the standby power P1 is in a range of 20W to 100W, and the target power P is in a range of 100W to 500W.
6. The method of claim 3, wherein in step S2, after the system pulls the current at a pull rate N1, the method further comprises determining whether the output power of the DC/DC module reaches a target power P, if so, performing step S3, and if not, continuing to pull the current at the pull rate N1.
7. The method of controlling and managing a fuel cell according to claim 3, wherein in the step S3, when the temperature of the fuel cell stack is greater than the first temperature threshold T1, the system further includes performing current load reduction at a load reduction speed N2, determining whether the temperature of the fuel cell stack is less than the second temperature threshold T2, if yes, returning to the step S2, and if not, continuing to perform current load reduction at the load reduction speed N2.
8. The method for controlling and managing a fuel cell according to claim 7, wherein the pull-up speed N1 is 1A/s to 10A/s, the pull-down speed N2 is 5A/s to 10A/s, the first temperature threshold T1 is 60 ℃ to 70 ℃, the second temperature threshold T2 is 50 ℃ to 60 ℃, the hydrogen gas remaining amount threshold N is 10% -20%, and the second voltage threshold V2 is 42V to 52V.
9. The method for controlling and managing a fuel cell according to claim 3, wherein in the step S4, if the hydrogen remaining amount SOC is smaller than the hydrogen remaining amount threshold value N, the method further comprises the steps of: S4.1, actively reducing load of the system, and reporting hydrogen SOC low early warning through an FCU control module; S4.2, the system enters a power limiting operation stage and continuously charges the lithium battery; s4.3, judging whether the voltage of the lithium battery is larger than a second voltage threshold V2, if so, entering a shutdown stage of the system, and otherwise, returning to the step S4.2.
10. The method of claim 3, further comprising the step of continuing to charge the lithium battery at the rated power if the hydrogen remaining SOC is greater than the hydrogen remaining threshold N in the step S4, determining whether the lithium battery voltage is greater than a second voltage threshold V2, if so, entering a shutdown stage, and otherwise, returning to the step S3.

Description

Fuel cell control management system and method thereof Technical Field The invention relates to the technical field of fuel cell system control, in particular to a fuel cell control management system and a method thereof. Background When the fuel cell system works, fuel (hydrogen, methanol and the like) and oxygen (generally using air) need to be fed into a core reaction unit electric pile, electric energy and heat energy are output after chemical reaction, and a final product is discharged, the fuel cell system is not just a driving controller of a vehicle, but is a 'brain' or an 'energy manager' of a complex energy system, the primary task of the fuel cell system is to coordinate two power sources with different characteristics of the fuel cell system and the lithium cell system so as to realize the optimization of the whole vehicle performance, efficiency and durability, but with the development of fuel cell technology, particularly a vehicle fuel cell system, the requirements on real-time performance, reliability, safety and efficiency of the system control are increasingly improved, however, the conventional fuel cell control system generally has the following problems: the control functions (such as hydrogen supply, heat management and the like) of the fuel cell control system are usually realized by a plurality of independent controllers or software modules, so that the system has complex architecture, high communication load and difficult cooperative control; The management strategy of the electric management unit (namely EMU, usually refers to a subsystem responsible for monitoring the voltage of a fuel cell stack, evaluating the health state of the stack and the like) is simpler, the existing scheme usually only pays attention to the protection of single faults, lacks active management and self-adaptive adjustment of the performance attenuation and consistency change of the stack, and cannot maximize the service life of the stack and the system efficiency on the premise of ensuring the safety; The real-time performance and the reliability are insufficient, the task scheduling mechanism of the traditional control software architecture is imperfect, the requirement of high real-time performance of multiple tasks is difficult to meet, and when the system state changes sharply or fails, the response is not timely, so that the damage of a galvanic pile or the performance of the system can be reduced. Disclosure of Invention In view of the above problems, the present invention provides a fuel cell control management system and a method thereof, which can simplify the system architecture, realize the optimal management of the state of a stack, and ensure the real-time performance and the operational reliability. The invention adopts the following technical scheme that the fuel cell control management system comprises: A hydrogen storage module connected with the fuel cell stack for providing hydrogen; the electric pile heat dissipation module is connected with the fuel electric pile and the hydrogen storage module and is used for dissipating heat of the fuel electric pile and heating the hydrogen storage module; the DC/DC module is connected with the electric fuel cell stack and the lithium battery and is used for realizing voltage-current conversion; The motor driving module is connected with the DC/DC module and the lithium battery and is used for realizing forward and reverse rotation control of the motor based on the power supply mode of the DC/DC module and the lithium battery; The FCU control module is connected with the hydrogen storage module and the DC/DC module, and is used for monitoring the hydrogen residual quantity of the hydrogen storage module, realizing power supply control and DC/DC module control and realizing low hydrogen residual quantity early warning. Further, the system also comprises an IOT module which is connected with the FCU control module and is used for receiving a hydrogen residual quantity low early warning signal output by the FCU control module to realize early warning response; the invention also provides a fuel cell control management method, which comprises the following steps: S1, comparing the obtained fuel cell stack single-chip voltage with a first voltage threshold V1 in a system running state, and if the fuel cell stack single-chip voltage is larger than the first voltage threshold V1, performing a step S2; S2, pulling current at a pulling speed N1 by the system until the output power of the DC/DC module reaches the target power P, and then performing step S3; S3, the system operates at rated power, and compares the temperature of the fuel cell stack with a first temperature threshold T1 during operation, if the temperature is greater than the first temperature threshold T1, the system carries out current load reduction and returns to the step S2, and if the temperature is less than the first temperature threshold T1, the step S4 is carried out; S4, acquiring t