CN-122025709-A - Dynamic regulation method for fuel cell temperature control and related products

CN122025709ACN 122025709 ACN122025709 ACN 122025709ACN-122025709-A

Abstract

The invention belongs to the technical field of fuel cell temperature control. A dynamic regulation method for controlling the temperature of fuel cell and its relative product are disclosed, which features that the electric pile current and the temp of cooling liquid inlet are obtained in real time, the three current intervals are divided based on the first and the second current thresholds, and the multi-stage temp thresholds are combined to determine the target control mode. And in the high-current area, actively entering a high-temperature mode when the heat dissipation capacity is saturated and the duration is in compliance so as to excavate the heat capacity potential, otherwise, executing the power limiting or fault alarming. According to the invention, the self-adaptive adjustment of working conditions is realized through the multidimensional coupling logic, the temperature fluctuation caused by the abrupt change of load is effectively stabilized, the frequent vibration and unnecessary power loss are avoided, and the durability, the safety and the output efficiency of the fuel cell engine are obviously improved.

Inventors

LI TINGTING
You Qingku
HOU WEI
ZHANG HONGYAN
MENG FANSONG
LIU DETONG

Assignees

山东国创燃料电池技术创新中心有限公司

Dates

Publication Date: 20260512
Application Date: 20260416

Claims (10)

1. A method for dynamically adjusting the temperature control of a fuel cell, comprising the steps of: acquiring a pile current and a cooling liquid inlet temperature of a fuel cell engine; Determining a current interval according to a comparison result of the current of the electric pile and the first current threshold value and the second current threshold value, and determining a target temperature control mode in the current interval according to a comparison result of the cooling liquid inlet temperature and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value; if the determined target temperature control mode is a power limiting mode, limiting the power of the engine to a preset power value, and after detecting that the temperature of the cooling liquid inlet is recovered to a normal range, recovering the current pulling rate according to the rising rate set in a time period until the normal temperature adjustment mode is recovered; If the determined target temperature control mode is a high temperature mode, when the heat radiation capacity is confirmed to reach the maximum value and the operation duration of the high temperature mode meets the requirement of the preset duration, the required temperature is adjusted to be higher than the high temperature required temperature of the normal required temperature until the cooling liquid inlet temperature is recovered and then the normal temperature adjustment mode is entered.
2. The dynamic adjustment method for fuel cell temperature control according to claim 1, characterized in that, Determining a current interval according to a comparison result of the pile current with the first current threshold and the second current threshold, including: When the current of the electric pile is smaller than or equal to a first current threshold value, determining that the electric pile is currently in a first current interval; when the current of the electric pile is larger than the first current threshold value and smaller than the second current threshold value, determining that the current is in a second current interval; when the pile current is greater than or equal to the second current threshold, determining that the pile current is currently in a third current interval.
3. The dynamic adjustment method for fuel cell temperature control according to claim 2, characterized in that, When the temperature control device is in the first current interval, determining a target temperature control mode in the current interval according to the comparison result of the cooling liquid inlet temperature and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value, wherein the target temperature control mode comprises the following steps: When the temperature of the cooling liquid inlet is smaller than or equal to a first temperature threshold, determining that the target temperature control mode is a normal temperature regulation mode, wherein the first temperature threshold corresponds to a normal required temperature in a first current interval; when the coolant inlet temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, determining that the target temperature control mode is a coolant inlet temperature high-power mode; And when the cooling liquid inlet temperature is larger than the second temperature threshold value, executing cooling liquid inlet temperature high fault alarm.
4. The dynamic adjustment method for fuel cell temperature control according to claim 2, characterized in that, When the temperature control device is in the second current interval, determining a target temperature control mode in the current interval according to the comparison result of the cooling liquid inlet temperature and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value, wherein the target temperature control mode comprises the following steps: When the temperature of the cooling liquid inlet is smaller than the third temperature threshold value, determining that the target temperature control mode is a cooling liquid inlet temperature low-limit power mode, and limiting power until the temperature of the cooling liquid inlet reaches a fourth temperature threshold value; when the coolant inlet temperature is greater than or equal to the third temperature threshold and less than or equal to the first temperature threshold, determining that the target temperature control mode is a normal temperature adjustment mode; when the coolant inlet temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, determining that the target temperature control mode is a coolant inlet temperature high-power mode; And when the cooling liquid inlet temperature is larger than the second temperature threshold value, executing cooling liquid inlet temperature high fault alarm.
5. The dynamic adjustment method for fuel cell temperature control according to claim 2, characterized in that, When the temperature control device is in the third current interval, determining a target temperature control mode in the current interval according to the comparison result of the cooling liquid inlet temperature and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value, wherein the target temperature control mode comprises the following steps: when the coolant inlet temperature is less than or equal to the third temperature threshold, determining that the target temperature control mode is a coolant inlet temperature low-power mode, and limiting power until the coolant inlet temperature reaches a fourth temperature threshold; when the coolant inlet temperature is greater than or equal to the third temperature threshold and less than or equal to the first temperature threshold, determining that the target temperature control mode is a normal temperature adjustment mode; When the temperature of the cooling liquid inlet is larger than the first temperature threshold and smaller than or equal to the second temperature threshold, judging whether the heat dissipation capacity reaches the maximum value in the normal temperature control range and whether the operation duration of the high temperature mode is in the electric pile requirement range; If the heat radiation capability reaches the maximum value in the normal temperature control range and the operation duration of the high temperature mode is in the electric pile requirement range, determining that the target temperature control mode is high Wen Moshi; If the heat radiation capacity does not reach the maximum value in the normal temperature control range, executing the fault alarm of the radiator; if the heat radiation capacity reaches the maximum value in the normal temperature control range and the operation time of the high temperature mode exceeds the range required by the galvanic pile, determining that the target temperature control mode is a cooling liquid inlet temperature high-limit power mode; And when the cooling liquid inlet temperature is larger than the second temperature threshold value, executing cooling liquid inlet temperature high fault alarm.
6. The dynamic adjustment method for fuel cell temperature control according to claim 5, characterized in that, Judging whether the heat radiation capability reaches the maximum value in the normal temperature control range, comprising: Monitoring the running state of the current heat dissipation system, and judging that the heat dissipation capacity reaches the maximum value in the normal temperature control range if the heat dissipation system outputs the maximum heat dissipation capacity at the current cooling liquid inlet temperature; The high temperature required temperature corresponding to the high Wen Moshi is realized by improving the target temperature set value of the cooling liquid, and the target temperature set value of the cooling liquid is higher than the required temperature in the normal temperature regulation mode.
7. A fuel cell temperature control dynamic regulation system, characterized by comprising: a data acquisition unit configured to acquire a stack current and a coolant inlet temperature of the fuel cell engine; A mode judging unit configured to determine a current section according to a comparison result of the stack current with the first current threshold and the second current threshold, and determine a target temperature control mode in the current section according to a comparison result of the cooling liquid inlet temperature with the first temperature threshold, the second temperature threshold and the third temperature threshold; the power limiting recovery unit is configured to limit the power of the engine to a preset power value if the determined target temperature control mode is a power limiting mode, and recover the current load pulling rate according to the rising rate set in a time period after detecting that the temperature of the cooling liquid inlet is recovered to a normal range until the temperature is recovered to the normal temperature regulation mode; And the high-temperature adjusting unit is configured to adjust the required temperature to a high-temperature required temperature higher than the normal required temperature when the determined target temperature control mode is a high-temperature mode, the heat radiation capacity is confirmed to reach the maximum value, and the operation duration of the high-temperature mode meets the requirement of the preset duration, until the cooling liquid inlet temperature is recovered and then the normal temperature adjusting mode is entered.
8. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program adapted to be loaded by a processor and to perform the fuel cell temperature control dynamic adjustment method according to any one of claims 1 to 6.
9. A computer device comprises a processor and a computer-readable storage medium; a processor adapted to execute a computer program; a computer-readable storage medium having stored therein a computer program which, when executed by the processor, implements the fuel cell temperature control dynamic adjustment method according to any one of claims 1 to 6.
10. A vehicle characterized by comprising a controller configured to perform the fuel cell temperature control dynamic adjustment method of any one of claims 1-6, or the vehicle comprises the fuel cell temperature control dynamic adjustment system of claim 7, or the vehicle comprises the computer readable storage medium of claim 8, or the vehicle comprises the computer device of claim 9.

Description

Dynamic regulation method for fuel cell temperature control and related products Technical Field The invention relates to the technical field of fuel cell temperature control, in particular to a dynamic temperature control regulating method for a fuel cell and a related product. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. The fuel cell is used as a high-efficiency and clean energy conversion device and has wide application prospect in the fields of transportation and distributed power generation. In the running process of the fuel cell engine, a large amount of reaction heat can be generated in the electric pile, if the heat cannot be timely dissipated, the temperature of the electric pile is too high, the performance of the membrane electrode is affected, even irreversible damage is caused, otherwise, if the temperature is too low due to excessive heat dissipation, the reaction efficiency is reduced, and the risk of flooding is caused. Therefore, the thermal management system is one of the core subsystems of the fuel cell engine, and its main function is to maintain the stack within an optimal operating temperature range by adjusting the flow and temperature of the coolant. The existing thermal management control strategy is generally based on the mapping relation between the current of the electric pile and the temperature of the cooling liquid, and controls the rotating speed of a radiator fan, the flow of a water pump and the opening of a thermostat through table lookup or simple logic judgment so as to realize basic temperature constant control and ensure the stable operation of the electric pile under the conventional working condition. However, the prior art lacks a refined hierarchical response mechanism and a smooth recovery strategy in the face of complex dynamic conditions and extreme temperature anomalies. The traditional control method is usually used for carrying out simple power limiting or alarm processing only according to a single temperature threshold value, and the difference of the temperature tolerance capability of a galvanic pile current interval is not fully considered, so that the power can be excessively limited in a low current interval or a heat dissipation bottleneck can not be timely identified in a high current interval. Particularly, when the temperature of the cooling liquid is abnormally increased but does not reach the fault threshold, the prior art lacks a high Wen Moshi which can actively raise the required temperature to buffer by utilizing the heat capacity of the electric pile after confirming that the heat dissipation capacity is saturated, and the system is easy to enter a protection state frequently. In addition, after the temperature anomaly is eliminated, the existing strategy is usually directly restored to the normal pulling rate, and the gradient restoration process in a time period is lacked, so that the abrupt load increase is extremely easy to cause secondary fluctuation of the temperature of a pile, and the system is repeatedly oscillated between a normal mode and a protection mode, so that the running stability and durability of the fuel cell engine are seriously affected. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a fuel cell temperature control dynamic regulation method and related products, which realize temperature control dynamic regulation in different current intervals and ensure stable operation of an engine. In order to achieve the above purpose, the present invention adopts the following technical scheme: in a first aspect, the present invention provides a method for dynamically adjusting the temperature control of a fuel cell. A method for dynamically adjusting the temperature control of a fuel cell, comprising the steps of: acquiring a pile current and a cooling liquid inlet temperature of a fuel cell engine; Determining a current interval according to a comparison result of the current of the electric pile and the first current threshold value and the second current threshold value, and determining a target temperature control mode in the current interval according to a comparison result of the cooling liquid inlet temperature and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value; if the determined target temperature control mode is a power limiting mode, limiting the power of the engine to a preset power value, and after detecting that the temperature of the cooling liquid inlet is recovered to a normal range, recovering the current pulling rate according to the rising rate set in a time period until the normal temperature adjustment mode is recovered; If the determined target temperature control mode is a high temperature mode, when the heat radiation capacity is confirmed to reach the maximum value and th