CN-122000387-A - Fuel cell system

Abstract

The present disclosure provides a fuel cell system. In a fuel cell system having a plurality of fuel cells and a storage battery and having no DCDC converter, deterioration of the plurality of fuel cells is suppressed, and deterioration of durability of the fuel cell system is suppressed. A fuel cell system (1) is provided with 3 FC stacks (11A-11C) connected in parallel, 1 storage battery (12) connected to all FC stacks of the 3 FC stacks (11A-11C), and a control device (20), and is not provided with a DCDC converter. The control device (20) is configured to measure the FC current of 3 FC stacks (11A-11C) simultaneously. A control device (20) controls the power generation of 3 FC stacks (11A-11C) based on the difference in FC currents measured simultaneously.

Inventors

• Shallowly marshes

Assignees

• 爱三工业株式会社

Dates

Publication Date

20260508

Application Date

20251016

Priority Date

20241107

Claims (5)

1. 1. A fuel cell system comprising a plurality of fuel cells connected in parallel and 1 storage battery connected to all of the plurality of fuel cells, and not comprising a DCDC converter, characterized in that, Further comprising a control device for controlling the power generation of the plurality of fuel cells, The control device is configured to measure the currents of the plurality of fuel cells simultaneously, and to control the power generation of the plurality of fuel cells based on a difference in the measured current values of the fuel cells measured simultaneously.
2. 2. The fuel cell system according to claim 1, wherein, The control device learns the current measurement values measured at the same time, preferentially generates power for the fuel cell having the higher current measurement value among the learned plurality of current measurement values, and changes the number of the fuel cells performing power generation according to the required output of the fuel cell system.
3. 3. The fuel cell system according to claim 2, wherein, The outputs of a plurality of the fuel cells are set to be identical to each other, The maximum required output of the fuel cell system is satisfied by the power generation of N fuel cells, the total number of the fuel cells is set to be N+1 or more, The control device uses the N fuel cells corresponding to the first N current measurement values in the order from high to low among the learned plurality of current measurement values for power generation.
4. 4. The fuel cell system according to claim 1, wherein, Also provided with an alarm device for notifying the deterioration of the fuel cell, The control device may be configured to cause the alarm device to perform a warning notification operation when the current measurement value of the fuel cell is lower than a first current determination value, and to cause the alarm device to perform an abnormality notification operation when the current measurement value of the fuel cell is lower than a second current determination value lower than the first current determination value, when the fuel cell is considered to be in a degradation abnormality.
5. 5. The fuel cell system according to claim 4, wherein, The control device is configured to measure a voltage of the battery, and to change the first current determination value and the second current determination value in accordance with the measured value of the voltage.

Description

Fuel cell system Technical Field The technology disclosed in the present specification relates to a fuel cell system including a fuel cell and a battery charged with electric power generated by the fuel cell. Background Conventionally, for example, a "power generation device" described in patent document 1 below is known. The device is configured to include a plurality of fuel cells connected in parallel, 1 secondary battery (storage battery) connected to all of the plurality of fuel cells, a load, a control device, and a DCDC converter-free device. The control device controls the start and stop of the plurality of fuel cells and the storage battery in consideration of the load and the start time of the fuel cells. Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication No. 2005-294190 Disclosure of Invention Problems to be solved by the invention The power generation device described in patent document 1 is configured as a device without a DCDC converter, and therefore can be simplified in structure, but there are cases where there are differences in the degree of degradation between a plurality of fuel cells. Here, if a plurality of fuel cells are operated without taking the difference in degradation into consideration, the degradation of the durability of the fuel cell with large degradation is accelerated, and the durability of the power generation device may be reduced. The present disclosure has been made in view of the above-described circumstances, and an object thereof is to suppress degradation of a plurality of fuel cells and suppress degradation of durability as a fuel cell system in a fuel cell system that includes a plurality of fuel cells and a storage battery and that does not have a DCDC converter. Solution for solving the problem In order to achieve the above object, a first aspect of the present invention provides a fuel cell system including a plurality of fuel cells connected in parallel and 1 storage battery connected to all of the plurality of fuel cells, and not including a DCDC converter, wherein the fuel cell system further includes a control device for controlling power generation of the plurality of fuel cells, the control device being configured to simultaneously measure currents of the plurality of fuel cells, and to control power generation of the plurality of fuel cells based on a difference in measured current values of the plurality of fuel cells measured simultaneously. According to the configuration of the above technique, the control device measures the currents of the plurality of fuel cells simultaneously, and controls the power generation of the plurality of fuel cells based on the difference in the measured current values of the fuel cells measured simultaneously. Therefore, a fuel cell with a high current measurement value and little degradation can be used for power generation, and a fuel cell with a low current measurement value and a risk of degradation can be suppressed from being used for power generation. Therefore, deterioration of each of the plurality of fuel cells can be suppressed, and deterioration of durability as a fuel cell system can be suppressed. In order to achieve the above object, a second aspect of the present invention provides the first aspect of the present invention, wherein the control device learns the current measurement values measured simultaneously, preferentially generates power for the fuel cell having a higher current measurement value among the learned plurality of current measurement values, and changes the number of fuel cells performing power generation in accordance with the required output of the fuel cell system. According to the configuration of the above-described technique, in addition to the function of the technique described in the first invention, the control device preferentially generates power for the fuel cell having the high current measurement value out of the learned plurality of current measurement values, and changes the number of fuel cells performing power generation in accordance with the required output of the fuel cell system. Therefore, the fuel cell having a low current measurement value and a risk of deterioration can be used for power generation while suppressing the power generation corresponding to the required output. In order to achieve the above object, in the technology according to the third aspect of the present invention, the outputs of the plurality of fuel cells are set to be identical to each other, the maximum required output of the fuel cell system is satisfied by the power generation of the N fuel cells, the total number of the fuel cells is set to be n+1 or more, and the control device uses N fuel cells corresponding to the first N current measurement values in the order from high to low among the learned plurality of current measurement values for power generation. According to the configuration of the above-described technique, in addition to t