CN117080501A - Pile rotation control method, pile rotation control device, pile rotation control equipment, storage medium and computer product - Google Patents
Pile rotation control method, pile rotation control device, pile rotation control equipment, storage medium and computer product Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
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Abstract
The application relates to a pile rotation control method, a pile rotation control device, pile rotation control equipment, a storage medium and a computer product. The method comprises the following steps: adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode; determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack; and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system. By adopting the method, long-time high-temperature work of the working electric pile can be avoided, the attenuation speed of the working electric pile is reduced, and the service life of the working electric pile is prolonged.
Description
Technical Field
The present application relates to the field of fuel cell technology, and in particular, to a method, apparatus, device, storage medium, and computer product for controlling stack rotation.
Background
The fuel cell directly converts chemical energy stored in fuel into electric energy through electrochemical reaction, and is an energy conversion mode with high efficiency and low emission. In all fuel cells, the power generation efficiency of the intermediate-temperature SOFC (Solid Oxide Fuel Cell ) can reach more than 60%, the recovery energy efficiency reaches more than 90%, and the method is one of the most development prospect energy conversion technologies at present.
The prior SOFC system is provided with a plurality of electric stacks, when in operation, each electric stack is at a high temperature of more than 700 ℃, and the electric stacks can be accelerated to decay when being in a high-temperature working state for a long time, so that the service life of the electric stacks is influenced. Therefore, a need exists for a stack rotational control method that can increase the lifetime of the stack to improve the reliability of the SOFC system.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a stack rotation control method, apparatus, device, storage medium, and computer product that can improve the life of a stack.
In a first aspect, the present application provides a pile rotation control method. The method comprises the following steps:
adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack;
and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
In one embodiment, determining a stack to be cycled that needs to be cycled in a working stack includes:
and determining the degradation rate of each working pile, and determining the pile to be cycled according to the degradation rate.
In one embodiment, determining a degradation rate of each operating stack, determining a stack to be cycled according to the degradation rate, includes:
determining a degradation rate maximum value and a degradation rate minimum value in each degradation rate, and making a difference between the degradation rate maximum value and the degradation rate minimum value to obtain a degradation rate difference value;
and if the degradation rate difference value is larger than the degradation rate threshold value, taking the working pile corresponding to the degradation rate maximum value as a pile to be cycled.
In one embodiment, the method further comprises:
if the degradation rate of the to-be-cycled pile is smaller than that of the candidate pile, the to-be-cycled pile is controlled to continue to work until the degradation rate of the to-be-cycled pile is greater than or equal to that of the candidate pile, and the to-be-cycled pile is controlled to enter a cycled state.
In one embodiment, the method for switching in the candidate pile and cutting off the pile to be cycled in the power supply main circuit comprises the following steps:
cutting off the candidate pile in the power supply main circuit, and controlling the candidate pile to enter a low-temperature working mode;
when the candidate pile works in the low-temperature working mode for a preset time, cutting off the pile to be cycled in a power supply main circuit, adjusting the pile to be cycled to enter the low-temperature working mode, and adjusting the candidate pile to enter the standard working mode;
when the switching time is over, after the stack to be cycled is switched to the low-temperature working mode and the candidate stack is switched to the standard working mode, the candidate stack is connected to the power supply main circuit, so that the stack to be cycled enters a cycle state.
In one embodiment, the method further comprises:
when the candidate pile or the pile to be cycled is cut off from the power supply main circuit, the candidate pile or the pile to be cycled is connected with the energy storage battery, and the energy storage battery is used for supplying power to the external equipment through the energy storage battery when the candidate pile and the pile to be cycled are cut off from the power supply main circuit.
In a second aspect, the application further provides a device for controlling the stack rotation. The device comprises:
the electric pile setting module is used for adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
the pile rotation module is used for determining a pile to be rotated, which needs rotation, in the working pile, accessing the candidate pile in the power supply main circuit and cutting off the pile to be rotated so as to enable the pile to be rotated to enter a rotation state to obtain a new working pile;
the circulation processing module is used for taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially circulating to realize the cycle control of each stack in the fuel cell system.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the following steps:
adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack;
and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack;
and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
In a fifth aspect, the present application also provides a computer program product. The computer program product comprising a computer program which, when executed by a processor, performs the steps of:
adding candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack;
and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
According to the pile rotation control method, the pile rotation control device, the pile rotation control equipment, the storage medium and the computer product, the candidate piles are additionally arranged on the basis of a plurality of working piles arranged on the fuel cell system, the candidate piles are connected with the working piles in series, and the working piles are in a standard working mode; determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack; and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system. According to the application, the candidate electric pile connected in series with the working electric pile is additionally arranged in the fuel cell system, after the working electric pile works for a long time, the candidate electric pile is connected into the power supply main circuit to replace the electric pile to be cycled to work, so that the electric pile to be cycled is in a cycled state, the working electric pile is prevented from being in a high-temperature working state for a long time, the attenuation speed of the working electric pile is reduced, the service life of the working electric pile is prolonged, and the reliability of the fuel cell system is further improved.
Drawings
FIG. 1 is an application environment diagram of a stack rotation control method in one embodiment;
FIG. 2 is a flow chart of a method of pile rotation control in one embodiment;
FIG. 3 is a schematic diagram of a cell stack connection in a fuel cell in one embodiment;
FIG. 4 is a schematic flow chart of determining a stack to be cycled according to one embodiment;
FIG. 5 is a flow chart of a method for controlling stack rotation according to another embodiment;
FIG. 6 is a block diagram of a stack controller in one embodiment;
fig. 7 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The pile rotation control method provided by the embodiment of the application can be applied to an application environment shown in figure 1. Wherein the terminal 102 communicates with the server 104 via a network. The data storage system may store data that the server 104 needs to process. The data storage system may be integrated on the server 104 or may be located on a cloud or other network server. The server 104 adds candidate electric piles on the basis of a plurality of working electric piles arranged on the fuel cell system, the candidate electric piles are connected in series with the working electric piles, and the working electric piles are in a standard working mode; determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack; and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
The terminal 102 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, internet of things devices, and portable wearable devices, where the internet of things devices may be smart speakers, smart televisions, smart air conditioners, smart vehicle devices, and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like. The server 104 may be implemented as a stand-alone server or as a server cluster of multiple servers.
In one embodiment, as shown in fig. 2, a pile rotation control method is provided, and the method is applied to the server 104 in fig. 1 for illustration, and includes the following steps:
step 202, adding a candidate electric pile on the basis of a plurality of working electric piles arranged on the fuel cell system, wherein the candidate electric pile is connected with the working electric pile in series, and the working electric piles are all in a standard working mode.
Among them, a fuel cell is a cell that directly converts chemical energy stored in fuel into electric energy through an electrochemical reaction. A plurality of stacks, also called stacks, are arranged inside the fuel cell, and each stack is composed of a plurality of unit cells. Since the voltage of the fuel cell is not high, the output voltage of the cell is insufficient under a certain load, so that a plurality of cells need to be connected in series to form a cell stack to provide a voltage meeting the requirement level. In a fuel cell system, a plurality of operating stacks may be provided, each operating stack being connected in series or parallel.
Specifically, taking the example diagram of the cell stack connection shown in fig. 3 as an example, the fuel cell system includes three cell stacks, which are respectively indicated by a number 1, a number 2, and a number 3 in fig. 3, and the three operating cell stacks are sequentially connected in series. In this embodiment, a candidate pile is added on the basis of the existing working pile, and the added candidate pile and the original working pile are sequentially connected in series, which is denoted by the reference number 4 in fig. 3. The added candidate pile is completely consistent with the original working pile, and the working pile of the fuel cell system is subjected to the rotation control by additionally arranging the candidate pile so as to prolong the service life of the working pile. The operating stacks being in a standard operating mode means that the operating stacks are at a nominal operating temperature, which may be different for different types of stacks.
Further, the number of the additional candidate stacks is not limited in this embodiment, and may be one or more, and for convenience of description, the subsequent example is shown in fig. 3, where an additional candidate stack is taken as an example, and in practical application, a plurality of candidate stacks may be set according to requirements. When a plurality of candidate stacks are added, the control mode of each candidate stack is similar.
Step 204, determining a stack to be cycled which needs to be cycled in the working stacks, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state, and obtaining a new working stack.
The stack to be cycled is a stack which needs to enter a cycled state in all working stacks, and because each working stack in the fuel cell system is in a high-temperature working state for a long time to influence the service life, the stack to be cycled control method of the embodiment switches the working state of the candidate stacks to be cycled through the candidate stacks, so that the candidate stacks enter a normal working mode, and the stack to be cycled enters the cycled state, so that the stacks can avoid long-time high-temperature working and the service life of the stacks is prolonged.
And cutting off the stack to be cycled from the power supply main circuit, and entering a cycled state after the stack to be cycled is cycled. At this time, the stack to be cycled can be stopped directly or operated at a lower temperature. The pile is considered to be put into a state of rotation as long as it is not operated at a continuous high temperature for a long time, wherein the high temperature operation means operation at a standard temperature (rated operation temperature) of the pile.
Generally, the cycle time of the stack may be determined according to the operation cycle of the stack, that is, a cycle is controlled to enter a cycle state. The rotation time can be defined according to the number of the stacks and the working condition, for example, the rotation time of each working stack can be adjusted according to the state or scene requirement of the stacks.
Furthermore, the rotation time is calculated according to the consistency principle of all the working stacks, namely the rotation time of the stacks is controlled under the condition that the working state of each stack is consistent. Because the electric pile is formed by connecting a plurality of single cells in series, even if the structural capacity and the like of each electric pile are uniform, nonuniform electric, gas and heat working conditions caused by space positions and electric pile structures can cause non-uniformity among different cells, so that the polarization states of the series-connected cells in the electric pile are different, and nonuniform degradation is caused. In extreme conditions, a part of the cells may even have extremely large overvoltage or reverse polarity phenomena, seriously jeopardizing the safe operation of the galvanic pile.
Taking the foregoing example as an example, assume that the stack with the number 1 is a stack to be cycled, when the stack with the number 1 enters a state of being cycled, the candidate stack with the number 4 is put into the power supply main circuit to supply power to the external device, and then the working stacks originally including the number 1, the number 2 and the number 3 are updated, and the updated working stacks are the working stacks with the numbers 2, 3 and 4. That is, the next stack to be cycled will be selected from among the operational stacks numbered 2, 3, and 3.
And 206, taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into a power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
As in the previous example, the stack with the number 4 has been updated to a new working stack, the original stack to be cycled with the number 1 is taken as a new candidate stack, and the new stack to be cycled is determined in the new working stack. And (3) circularly controlling the power supply main circuit to which the new candidate stacks are connected and cutting off the new stacks to be cycled in the power supply main circuit, so that the stacks to be cycled enter a cycle state, and iterating the circularly control to realize the cycle control of each stack in the fuel cell system. Until the fuel cell system stops operating.
In the pile rotation control method, candidate piles are additionally arranged on the basis of a plurality of working piles arranged on a fuel cell system, the candidate piles are connected with the working piles in series, and the working piles are in a standard working mode; determining a stack to be cycled which needs to be cycled in a working stack, accessing the candidate stacks in a power supply main circuit and cutting off the stack to be cycled so as to enable the stack to be cycled to enter a cycle state to obtain a new working stack; and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system. According to the application, the candidate electric pile connected in series with the working electric pile is additionally arranged in the fuel cell system, after the working electric pile works for a long time, the candidate electric pile is connected into the power supply main circuit to replace the electric pile to be cycled to work, so that the electric pile to be cycled is in a cycled state, the working electric pile is prevented from being in a high-temperature working state for a long time, the attenuation speed of the working electric pile is reduced, the service life of the working electric pile is prolonged, and the reliability of the fuel cell system is further improved.
In one embodiment, determining a stack to be cycled in a working stack that requires cycling comprises: and determining the degradation rate of each working pile, and determining the pile to be cycled according to the degradation rate.
Where degradation rate is a parameter used to characterize stack performance degradation, the stack degradation may be caused by a variety of factors including chemical reactions, material composition, and operating temperature. In a simple sense, a stack with a high degradation rate may be understood as having a low service life. Therefore, in order to slow down the degradation of the stacks, the present embodiment acquires the degradation rates of all the operating stacks, and determines the stacks to be cycled through the degradation rates.
Illustratively, the degradation rate of all the stacks is obtained, and the stack with the highest degradation rate is determined as the stack to be cycled. If a plurality of stacks exist at the same time, the degradation rate is highest, and the stacks with high degradation rate can be orderly cycled according to the sequence number.
Further, in one embodiment, as shown in fig. 4, the degradation rate of each working stack is determined, and the stacks to be cycled are determined according to the degradation rate, including the following steps:
step 402, determining a degradation rate maximum value and a degradation rate minimum value in each degradation rate.
And acquiring the degradation rate of each pile, and determining the pile corresponding to the degradation rate maximum value and the pile corresponding to the degradation rate minimum value in all the working piles according to the acquired degradation rate.
And step 404, making a difference between the degradation rate maximum value and the degradation rate minimum value to obtain a degradation rate difference value.
Since the degradation rate of each stack is not the same, in order to ensure the consistency of all the operating stacks, it is necessary to control the degradation rate of all the operating stacks to fluctuate within a certain range. That is, the degradation rate threshold value is set for the degradation rate difference between the degradation rate maximum value and the degradation rate minimum value of the operating stack.
And step 406, if the degradation rate difference value is greater than the degradation rate threshold value, taking the working pile corresponding to the degradation rate maximum value as the pile to be cycled.
If the degradation rate difference value of the current operating pile is larger than the degradation rate threshold value, the degradation rate of the current operating pile exceeds the fluctuation range, and the operating pile corresponding to the degradation rate maximum value is set as the pile to be cycled. If the degradation rate difference value of the current working electric pile is not greater than the degradation rate threshold value, each electric pile in the working electric pile can be sequentially controlled to enter a rotation state according to the sequence number or other self-defined rules.
According to the embodiment, the degradation rate in the working electric pile is calculated, the degradation rate fluctuation range of the working electric pile is limited, the working state consistency of each electric pile is ensured, the degradation speed of the performance of each working electric pile in the fuel cell system is reduced, the service life of the electric pile is prolonged, and the reliability of the fuel cell system is further improved.
In one embodiment, the method further comprises: if the degradation rate of the to-be-cycled pile is smaller than that of the candidate pile, the to-be-cycled pile is controlled to continue to work until the degradation rate of the to-be-cycled pile is greater than or equal to that of the candidate pile, and the to-be-cycled pile is controlled to enter a cycled state.
Taking the foregoing example as an example, after the to-be-cycled pile is obtained through the calculation of the degradation rate, comparing the degradation rate of the to-be-cycled pile with the degradation rate of the candidate pile, if the degradation rate of the to-be-cycled pile is smaller than the candidate pile, indicating that the performance degradation of the candidate pile is faster than the to-be-cycled pile, at this time, controlling the to-be-cycled pile to continue to work and the candidate pile to continue to candidate, until the obtained degradation rate of the to-be-cycled pile is greater than or equal to the candidate pile, and controlling the to-be-cycled pile to enter a cycled state.
When the rotation control of the electric pile is carried out in the embodiment, the working electric pile and the candidate electric pile are compared together, and the electric pile with poor consistency in all the electric piles is selected to enter the rotation, so that all the working electric piles in operation can have good consistency, and the stable operation of the electric pile is facilitated.
In one embodiment, the step of accessing the candidate stacks and cutting off the stacks to be cycled at the power supply main circuit comprises the following steps: cutting off the candidate pile in the power supply main circuit, and controlling the candidate pile to enter a low-temperature working mode; when the candidate pile works in the low-temperature working mode for a preset time, cutting off the pile to be cycled in a power supply main circuit, adjusting the pile to be cycled to enter the low-temperature working mode, and adjusting the candidate pile to enter the standard working mode; when the switching time is over, after the stack to be cycled is switched to the low-temperature working mode and the candidate stack is switched to the standard working mode, the candidate stack is connected to the power supply main circuit, so that the stack to be cycled enters a cycle state.
First, taking the schematic diagram of pile connection shown in fig. 3 as an example, piles are connected in series in a power supply main circuit for supplying power to external devices. Wherein each pile is connected in parallel with a switching element, and the control switch is used for cutting off the pile from the power supply main circuit through short circuit.
Second, the low temperature operation mode is an operation mode lower than the rated operation temperature of the standard operation mode with respect to the standard operation mode of the stack, for example, the rated operation temperature of the standard operation mode is 700 ℃, and the operation temperature of the low temperature operation mode may be 500 ℃ or 600 ℃. The stack can still generate electric energy in a low-temperature working mode, but the generated electric energy is not high due to the low working temperature. Meanwhile, the operating temperature in the low-temperature operating mode is low, so that the galvanic pile can be considered to be at rest, namely, the galvanic pile enters a rotation state in the embodiment.
Taking the pile connection schematic diagram shown in fig. 3 as an example, assuming that the pile with the number 4 is a candidate pile, the pile with the number 1 is a pile to be cycled, and switching the candidate pile and the pile to be cycled in the power supply main circuit comprises the following steps:
(A) The candidate pile with the serial number 4 is controlled to enter a low-temperature working mode, and a switching element of the candidate pile is conducted, so that the candidate pile is cut off from a power supply main circuit. At this time, the candidate stack operates in a low-temperature operation mode below the standard operation temperature.
(B) When the working time of the working stacks with the sequence numbers 1 to 3 reaches the working period, determining the stack with the sequence number 1 as a stack to be cycled, conducting a switching element of the stack to be cycled with the sequence number 1, cutting off the stack to be cycled from a power supply main circuit, and adjusting the working temperature of the candidate stack to enable the candidate stack to enter a standard working mode.
(C) When the switching time is over, after the alternate stack is switched to the low-temperature working mode and the candidate stack is switched to the standard working mode, the switching element of the candidate stack with the sequence number of 4 is controlled to be disconnected, and the candidate stack is connected to the power supply main circuit. At this time, the electric pile with the serial number 4 is connected to the power supply main circuit to supply power to the external equipment, and the electric pile with the serial number 1 is in a low-temperature mode and enters a rotation state.
The setting of the switching time is due to the switching of the operating mode of the electric pile, no matter the electric pile is adjusted from the high-temperature operating mode to the low-temperature operating mode or from the low-temperature operating mode to the high-temperature operating mode, the switching between the operating modes is not changed instantaneously, and the operating mode of the electric pile can be completely switched after the switching time.
Further, in one embodiment, the method further comprises: when the candidate pile or the pile to be cycled is cut off from the power supply main circuit, the candidate pile or the pile to be cycled is connected with the energy storage battery, and the energy storage battery is used for supplying power to the external equipment through the energy storage battery when the candidate pile and the pile to be cycled are cut off from the power supply main circuit, so that the condition of insufficient power supply to the external equipment during the switching of the pile to be cycled is avoided.
Taking the foregoing example as an example, each cell stack is connected to the energy storage battery by a connecting element that connects the cell stack and the energy storage battery, which may be used to cause the cell stack to supply power to the energy storage battery, and may also be used to supply power to external devices through the energy storage battery.
When the candidate cell stack of control number 4 enters the low-temperature operation mode and the switching element of the candidate cell stack is turned on in step (a), the connection element of the candidate cell stack is also turned on, so that the candidate cell stack is connected with the energy storage battery. At this time, the candidate stack transmits the electric energy generated in the low-temperature operation mode to the energy storage battery for storage.
When the switching element of the serial number 1 is turned on in the step (B), the connection element of the stack to be cycled is also turned on so as to be connected with the energy storage battery. Because the standby stack of the serial number 1 and the candidate stack of the serial number 4 are connected with the energy storage battery, the standby stack and the candidate stack send generated electric energy to the energy storage battery for storage.
When the switching element of the candidate stack with the disconnection number 4 is controlled in the step (C), the connection element of the candidate stack is also turned off, and the connection with the energy storage battery is cut off.
It should be noted that, when the candidate pile and the pile to be cycled are cut off from the power supply main circuit at the same time, the electric energy output by the remaining working pile in a normal working state may not meet the power supply requirement of the external device, and at this time, the energy storage battery and the external device may be connected to implement the supplementary supply of the electric energy so as to ensure the power supply requirement of the external device.
According to the embodiment, the switching element and the connecting element are used for controlling the connection and disconnection of the electric pile and the power supply main circuit, logic is simple and easy to realize, when the candidate electric pile and the electric pile to be cycled do not supply power to external equipment in the rotational control, the energy storage battery is arranged for supplementing the gap, and the electric energy generated by the electric pile in the low-temperature working mode can be transmitted to the energy storage battery for storage, so that the utilization rate of the electric pile is greatly improved.
In one embodiment, the cycle time TD for the ith stack i The relationship between the duty cycle TI, the cycle time TD corresponding to a single duty cycle, and the switching time TC can be expressed as:
time of rotation TD i Total time of operation/duty cycle TI single duty cycle corresponding cycle time of rest TD
The total working time refers to the total working time of the electric pile from the access of the power supply main circuit to the removal of the power supply main circuit. Taking the working period as TI as an example, the first time TD1 of entering the stack of the stack is:
the second cycle time TD2 of the stack entering the cycle is:
the third cycle time TD3 of the stack entering the cycle is:
this completes one cycle.
In one embodiment, in combination with fig. 3 and as in fig. 5, the stack break control method comprises the steps of:
step 502, adding a candidate pile on the basis that the fuel cell system is provided with an operating pile.
And on the basis that the fuel cell system is provided with No. 1 to No. 3 working stacks, a No. 4 candidate stack is additionally arranged. Wherein, the No. 1 to No. 3 operation electric pile is in the standard operation mode.
And 504, determining a stack to be cycled which needs to be cycled in the working stacks, and controlling the candidate stacks to enter a low-temperature working mode.
And determining the No. 1 pile as a pile to be cycled. The stack to be cycled can be determined according to the degradation rate, and can also be cycled directly according to the serial number of the stack.
Before the working time of the No. 1 to 3 working electric pile is smaller than the working period TI, the No. 4 electric pile is controlled to carry out a low-temperature working mode, the event can be expressed as the working period TI minus the turn-on time TD, and the No. 4 electric pile is adjusted to enter the low-temperature working mode before one working period, because the No. 4 electric pile is communicated with the energy storage battery at the moment, electricity generated by the electric pile in the low-temperature working mode can be contained in the energy storage battery, and the condition of insufficient power supply to external equipment when the electric pile turns-on is avoided.
And step 506, cutting off the pile to be cycled at the power supply main circuit.
When the working time of the working pile reaches the working period TI, the pile is switched at high and low temperatures, the pile to be cycled is cut off from the power supply main circuit, the pile is adjusted to a low-temperature working mode, and the candidate pile No. 4 is adjusted to a high-temperature working mode.
And step 508, accessing the candidate pile in the power supply main circuit.
After the switching time TC, the working mode of the pile is switched, and the candidate pile is connected to a power supply main circuit for supplying power to the external equipment.
Step 510, repeating steps 504 to 508 to realize the rotation control of all stacks.
According to the embodiment, the candidate stacks are arranged on the basis of the existing stacks, and each stack can be prevented from working at high temperature for a long time through reasonable rotation control, so that the performance attenuation of the stacks is slowed down, the service life of the stacks is prolonged, and the reliability of a fuel cell system is improved.
It should be understood that, although the steps in the flowcharts related to the above-described embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a pile-up control device for realizing the pile-up control method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of one or more pile-on-loop control devices provided below may be referred to the limitation of the pile-on-loop control method hereinabove, and will not be repeated herein.
In one embodiment, as shown in fig. 6, there is provided a stack rotational control apparatus including: a galvanic pile setting module 602, a galvanic pile rotation module 604, and a cycle processing module 606, wherein:
the electric pile setting module 602 is configured to add a candidate electric pile on the basis of a plurality of working electric piles set in the fuel cell system, where the candidate electric pile is connected in series with the working electric pile, and the working electric pile is in a standard working mode;
the stack rotation module 604 is configured to determine a stack to be rotated, which needs rotation, in the working stacks, and connect the candidate stacks to a power supply main circuit and cut off the stack to be rotated, so that the stack to be rotated enters a rotation state, and a new working stack is obtained;
the circulation processing module 606 is configured to take the stack to be cycled as a new candidate stack, determine a new stack to be cycled in the new working stack, control the new candidate stack to be connected to the power supply main circuit, cut off the new stack to be cycled in the power supply main circuit, and circulate in turn, so as to realize the cycle control of each stack in the fuel cell system.
In one embodiment, the galvanic pile rotation module 604 is further configured to: and determining the degradation rate of each working pile, and determining the pile to be cycled according to the degradation rate.
In one embodiment, the galvanic pile rotation module 604 is further configured to: determining a degradation rate maximum value and a degradation rate minimum value in each degradation rate, and making a difference between the degradation rate maximum value and the degradation rate minimum value to obtain a degradation rate difference value; and if the degradation rate difference value is larger than the degradation rate threshold value, taking the working pile corresponding to the degradation rate maximum value as a pile to be cycled.
In one embodiment, the galvanic pile rotation module 604 is further configured to: if the degradation rate of the to-be-cycled pile is smaller than that of the candidate pile, the to-be-cycled pile is controlled to continue to work until the degradation rate of the to-be-cycled pile is greater than or equal to that of the candidate pile, and the to-be-cycled pile is controlled to enter a cycled state.
In one embodiment, the galvanic pile rotation module 604 is further configured to: cutting off the candidate pile in the power supply main circuit, and controlling the candidate pile to enter a low-temperature working mode; when the candidate pile works in the low-temperature working mode for a preset time, cutting off the pile to be cycled in a power supply main circuit, adjusting the pile to be cycled to enter the low-temperature working mode, and adjusting the candidate pile to enter the standard working mode; when the switching time is over, after the stack to be cycled is switched to the low-temperature working mode and the candidate stack is switched to the standard working mode, the candidate stack is connected to the power supply main circuit, so that the stack to be cycled enters a cycle state.
In one embodiment, the stack rest control device is further configured to: when the candidate pile or the pile to be cycled is cut off from the power supply main circuit, the candidate pile or the pile to be cycled is connected with the energy storage battery, and the energy storage battery is used for supplying power to the external equipment through the energy storage battery when the candidate pile and the pile to be cycled are cut off from the power supply main circuit.
All or part of the modules in the pile rotation control device can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer equipment is used for storing data such as pile operation data, battery power and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a pile-up rotation control method.
It will be appreciated by those skilled in the art that the structure shown in FIG. 7 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the method embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
The battery and stack information (including but not limited to information such as stack operation) and data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are both information and data authorized by the user or sufficiently authorized by each party.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A method for controlling stack rotation, the method comprising:
adding candidate electric piles on the basis of a plurality of working electric piles arranged on a fuel cell system, wherein the candidate electric piles are connected with the working electric piles in series, and the working electric piles are in a standard working mode;
determining a to-be-cycled pile needing to be cycled in the working pile, accessing the candidate pile in a power supply main circuit and cutting off the to-be-cycled pile so as to enable the to-be-cycled pile to enter a cycled state to obtain a new working pile;
and taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be accessed into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially cycling to realize the cycle control of each stack in the fuel cell system.
2. The method of claim 1, wherein the determining a stack to be cycled in the operating stacks that requires rotation comprises:
and determining the degradation rate of each working pile, and determining the pile to be cycled according to the degradation rate.
3. The method of claim 2, wherein said determining a degradation rate of each of said operating stacks, and determining said stack to be cycled based on said degradation rate, comprises:
determining a degradation rate maximum value and a degradation rate minimum value in each degradation rate, and carrying out difference on the degradation rate maximum value and the degradation rate minimum value to obtain a degradation rate difference value;
and if the degradation rate difference value is larger than a degradation rate threshold value, taking the working pile corresponding to the degradation rate maximum value as the pile to be cycled.
4. A method according to claim 3, characterized in that the method further comprises:
and if the degradation rate of the to-be-cycled pile is smaller than that of the candidate pile, controlling the to-be-cycled pile to continue to work until the degradation rate of the to-be-cycled pile is larger than or equal to that of the candidate pile, and controlling the to-be-cycled pile to enter a cycled state.
5. The method of claim 1, wherein the switching in the candidate stack and cutting out the stack to be cycled at the power supply main comprises:
cutting off the candidate pile in the power supply main circuit, and controlling the candidate pile to enter a low-temperature working mode;
cutting off the pile to be cycled in the power supply main circuit after the candidate pile works in the low-temperature working mode for a preset time, adjusting the pile to be cycled to enter the low-temperature working mode, and adjusting the candidate pile to enter the standard working mode;
when the switching time is over, the stack to be cycled is switched to a low-temperature working mode, and the candidate stack is switched to a standard working mode, and then the candidate stack is connected to the power supply main circuit, so that the stack to be cycled enters a cycle state.
6. The method according to claim 1, wherein the method further comprises:
when the candidate pile or the pile to be cycled is cut off from the power supply main circuit, the candidate pile or the pile to be cycled is connected with an energy storage battery, and the energy storage battery is used for supplying power to external equipment through the energy storage battery when the candidate pile and the pile to be cycled are cut off from the power supply main circuit.
7. A stack break control device, the device comprising:
the fuel cell system comprises a pile setting module, a pile setting module and a pile control module, wherein the pile setting module is used for adding candidate piles on the basis of a plurality of working piles arranged on the fuel cell system, the candidate piles are connected with the working piles in series, and the working piles are all in a standard working mode;
the pile rotation module is used for determining a pile to be rotated, which needs rotation, in the working pile, accessing the candidate pile in a power supply main circuit and cutting off the pile to be rotated so as to enable the pile to be rotated to enter a rotation state to obtain a new working pile;
the circulation processing module is used for taking the stack to be cycled as a new candidate stack, determining the new stack to be cycled in the new working stack, controlling the new candidate stack to be connected into the power supply main circuit, cutting off the new stack to be cycled in the power supply main circuit, and sequentially circulating to realize the cycle control of each stack in the fuel cell system.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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| CN202311171408.0A CN117080501A (en) | 2023-09-12 | 2023-09-12 | Pile rotation control method, pile rotation control device, pile rotation control equipment, storage medium and computer product |
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| CN202311171408.0A CN117080501A (en) | 2023-09-12 | 2023-09-12 | Pile rotation control method, pile rotation control device, pile rotation control equipment, storage medium and computer product |
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