WO2024051348A1 - Fuel cell manufacturing method, and cell voltage control method and apparatus - Google Patents

Abstract

A fuel cell, comprising at least two battery packs to be processed, wherein said battery pack comprises at least one battery cell, and is configured with a current adjustment circuit, the current adjustment circuit being used for adjusting the voltage of the battery cell.

Description

Fuel cell manufacturing method, cell voltage control method and device

This application claims priority to the Chinese patent application with application number 202211106122.X, which was submitted to the China Patent Office on September 9, 2022. The entire content of the above application is incorporated into this application by reference.

Technical field

The present application relates to the technical field related to battery control, for example, to a manufacturing method of a fuel cell, a cell voltage control method and device applied to a fuel cell.

Background technique

A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. A type of technology for fuel cell current control mainly involves current loading through a voltage converter, or current loading according to a predetermined voltage; the cell voltage is monitored through a cell voltage monitoring device, and the current loading is determined based on the consistency of the cell voltage.

Contents of the invention

This application provides a manufacturing method of a fuel cell, a cell voltage control method and a device applied to the fuel cell.

In a first aspect, this application provides a method for manufacturing a fuel cell. The fuel cell includes at least two single cells. The method includes:

Divide at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery group to be processed includes at least one single battery;

A current adjustment circuit is configured for the battery pack to be processed, so that when there is a single cell that does not meet the preset conditions, the single cell voltage of the single cell is adjusted based on the current adjustment circuit corresponding to the single cell.

In a second aspect, this application provides a cell voltage control method applied to a fuel cell. The fuel cell includes at least two battery packs to be processed and a current adjustment circuit corresponding to the battery packs to be processed. In the battery pack to be processed, Including at least one single cell, the method includes:

In response to detecting that the fuel cell supplies power based on the start signal, obtain cell voltage data of the plurality of cell cells;

Based on the cell voltage data, determine the single cells to be processed that do not meet the preset conditions, and determine the to-be-operated current adjustment circuit corresponding to the single cells to be processed;

Control the working state of the to-be-operated current adjustment circuit to adjust the cell voltage data of the to-be-processed cell based on the to-be-operated current adjustment circuit until the cell voltage data meets the conditions for stopping the adjustment.

In a third aspect, this application provides a cell voltage control device applied to a fuel cell, which device includes:

a voltage data determination module configured to obtain cell voltage data of a plurality of single cells in response to detecting that the fuel cell supplies power based on the start signal;

The adjustment circuit determination module is configured to determine the single cells to be processed that do not meet the preset conditions based on the cell voltage data, and determine the to-be-operated current adjustment circuit corresponding to the single cells to be processed;

The voltage data adjustment module is configured to control the working state of the current adjustment circuit to be operated, and adjust the cell voltage data of the single cell to be processed based on the current adjustment circuit to be operated until the cell voltage data meets the conditions for stopping adjustment.

In a fourth aspect, the present application provides a fuel cell manufacturing device, which includes:

The battery group to be processed determining device is configured to divide at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery group to be processed includes at least one single battery;

The cell voltage adjustment device is configured to configure a current adjustment circuit for the battery pack to be processed, so that when there is a single cell that does not meet the preset conditions, the unit voltage of the single cell is adjusted based on the current adjustment circuit corresponding to the single cell. body voltage.

In a fifth aspect, this application provides an electronic device for cell voltage control applied to a fuel cell, including:

at least one processor; and

A memory communicatively connected to at least one processor; wherein,

The memory stores a computer program that can be executed by at least one processor, and the computer program is executed by at least one processor, so that the at least one processor can execute the cell voltage control method applied to the fuel cell according to any embodiment of the present application.

In a sixth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. The computer instructions are used to enable a processor to implement the unit used in a fuel cell according to any embodiment of the present application when executed. Voltage control method.

In a seventh aspect, the present application provides a computer program product. The computer program product includes a computer program. When executed by a processor, the computer program implements the cell voltage control method applied to a fuel cell according to any embodiment of the present application.

It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become readily understood from the following description.

Description of the drawings

The drawings needed to be used in the description of the embodiments will be briefly introduced below. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a flow chart of a fuel cell manufacturing method provided in Embodiment 1 of the present application;

Figure 2 is a schematic structural diagram of a fuel cell provided in Embodiment 1 of the present application;

Figure 3 is a schematic structural diagram of a current adjustment circuit corresponding to a fuel cell provided in Embodiment 1 of the present application;

Figure 4 is a flow chart of a cell voltage control method applied to a fuel cell provided in Embodiment 2 of the present application;

Figure 5 is a flow chart of a cell voltage control method applied to a fuel cell provided in Embodiment 3 of the present application;

Figure 6 is a flow chart of a cell voltage control method for a fuel cell provided in Embodiment 4 of the present application;

Figure 7 is a flow chart of another cell voltage control method for a fuel cell provided in Embodiment 4 of the present application;

Figure 8 is a schematic structural diagram of a cell voltage control device applied to a fuel cell provided in Embodiment 5 of the present application;

Figure 9 is a schematic structural diagram of a fuel cell manufacturing device provided in Embodiment 6 of the present application;

FIG. 10 is a schematic structural diagram of an electronic device provided in Embodiment 7 of the present application.

Detailed ways

A type of technology for fuel cell current control mainly involves current loading through a voltage converter, or current loading according to a predetermined voltage; the cell voltage is monitored through a cell voltage monitoring device, and the current loading is determined based on the consistency of the cell voltage.

However, in the face of a large voltage deviation of the cell during the current loading process, the working condition of the cell can only be improved by changing the operating conditions such as the air supply pressure or temperature. However, even if the operating conditions such as the air supply pressure or temperature are adjusted at this time, , it is also impossible to adjust the situation where the single voltage deviation is large.

In consideration of the above situation, the present application provides a fuel cell manufacturing method, a cell voltage control method and a device applied to the fuel cell.

In order to enable those skilled in the art to better understand the embodiments of the present application, the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Based on the embodiments in this application, all other implementations obtained by those of ordinary skill in the art without making creative efforts Examples should all fall within the scope of protection of this application.

It should be noted that the terms "first preset condition", "second preset condition", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "include" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

Embodiment 1

Before introducing this embodiment, the structure of the fuel cell is first described. The fuel cell is composed of multiple single cells. During the operation of the fuel cell, each single cell can provide current to meet the current requirements of the entire vehicle. need. In a fuel cell, each single cell corresponds to a device that monitors the voltage of the single cell. This device can collect and monitor the voltage value of each single cell. Embodiments of the present application can divide multiple single cells in a fuel cell into a group and configure a current adjustment circuit for them, thereby adjusting the current value flowing through the single cells to achieve the effect of reducing large single cell voltage deviations. .

Figure 1 is a flow chart of a fuel cell manufacturing method provided in Embodiment 1 of the present application. As shown in Figure 1, the fuel cell includes at least two single cells. The method also includes:

S110. Divide at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery groups to be processed include at least one single battery.

In this embodiment, the structural schematic diagram of the fuel cell is shown in Figure 2. As shown in Figure 2, the fuel cell is equipped with a fuel cell stack. The fuel cell stack is composed of multiple single cells. The single cells constitute the fuel cell. smallest unit. Among them, in Figure 2, one positive electrode and one negative electrode form a single cell. Multiple single cells can be divided arbitrarily to form a battery pack to be processed. For example, there may be 10 single cells as one battery group to be processed, or 20 single cells as one battery group to be processed. A fuel cell stack can be divided into any number of battery groups to be processed.

In one example, at least two single cells are divided into at least two groups to obtain at least two battery groups to be processed, including:

According to the position information of at least two single cells in the fuel cell, the fuel cell is divided into at least two battery groups to be processed.

Among them, the position information is the location of the single cell in the overall fuel cell stack, and the single cells adjacent to each other are divided into a battery group to be processed. As an example, as shown in Figure 2, in a fuel cell In the structural schematic diagram, according to the position of the single battery from left to right, it is divided into three battery packs to be processed. The three divided battery groups to be processed correspond to the battery group to be processed a, the battery group to be processed b, and the battery group to be processed c.

S120. Configure a current adjustment circuit for each battery group to be processed, so that when a single cell fails to meet the preset conditions, the cell voltage of the single cell is adjusted based on the current adjustment circuit corresponding to the single cell.

Among them, the current adjustment circuit can realize current compensation or current consumption of the associated battery pack to be processed, thereby causing the single cells at different positions in the overall fuel cell stack to output different currents. In the fuel cell provided in this embodiment, each single cell can be used as a battery pack to be processed, and a current adjustment circuit can be configured for each single cell. Usually, the single cells located at both ends of the fuel cell stack have relatively large losses, while the single cells located in the middle of the fuel cell stack have relatively small losses. Therefore, the single cells located at both ends of the fuel cell stack have relatively small losses. The bulk battery can be configured with a relatively large number of current adjustment circuits. For example, each single cell adjacent to the positive electrode of the fuel cell can be used as a battery pack to be processed, and current adjustment circuits can be configured for the five single cells adjacent to the positive electrode of the fuel cell; each single cell adjacent to the negative electrode of the fuel cell can be They are all used as a battery pack to be processed, and current adjustment circuits are configured for the five single cells adjacent to the negative electrode of the fuel cell. The preset condition is a preset condition, which may be, for example, the voltage deviation value condition of a single cell.

For example, as shown in Figure 3, according to the position of the single battery, it is divided into three battery groups to be processed from left to right. Battery group a to be processed corresponds to the current adjustment circuit a, battery group b to be processed corresponds to the current adjustment circuit b, The battery pack c to be processed corresponds to the current adjustment circuit c. The function of the current adjustment circuit is to vary the current flowing through the battery pack to be processed associated with the current adjustment circuit. The working mode of the current adjustment circuit is: the initial state of the current adjustment circuit is not working. If the current adjustment circuit detects that the preset conditions are not met, it will start to work at this time, and the current adjustment circuit will share a part of the current. The current value flowing to the single cell associated with the current adjustment circuit is reduced, and then the single cell voltage of the single cell is adjusted based on the current adjustment circuit corresponding to the single cell.

In one embodiment, the current adjustment circuit is at least one of the following circuits:

It consists of current output module, short circuit function module and discharge module;

It consists of current output module, diode to prevent reverse current, resistor and voltage acquisition module.

In this embodiment, the current adjustment circuit has a current output function, a direct short circuit function, a discharge function, a voltage monitoring function, etc. Therefore, the current adjustment circuit can be composed of a current output module, a short circuit function module and a discharge module; the current adjustment circuit can also include Current output device, diode to prevent reverse current, discharge resistor, voltage sampling analog to digital conversion (Analog to digital, AD), etc. Among them, the current The output module can output current for the fuel cell according to the preset operating current; the short-circuit function module can be used for overload protection. When the fuel cell runs beyond its limited current for a long time, it will cause the battery to overheat and damage the battery. Therefore, the short-circuit function module is required to protect the fuel cell. Battery load failure. The current adjustment circuit is composed of a current output module, a short-circuit function module and a discharge module. The connection relationship between the modules can be that the current output module is connected to the short-circuit function module, and the short-circuit function module is connected to the discharge module. The current adjustment circuit can adjust the current value flowing through the single cell associated with the current adjustment circuit. The current adjustment circuit is composed of a current output module, a diode to prevent reverse current, a resistor and a voltage acquisition module. The connection relationship between each module can be the connection between the current output module and the voltage acquisition module, and the diode, resistor and current to prevent reverse current. The output module is connected, and the current adjustment circuit can collect the voltage value of the single cell associated with the current adjustment circuit, and can adjust the current value flowing through the single cell associated with the current adjustment circuit.

This embodiment provides a fuel cell. The fuel cell includes at least two single cells. The at least two single cells are divided into at least two groups to obtain at least two battery groups to be processed; wherein, the battery groups to be processed are including at least one single cell; configure a current adjustment circuit for each battery pack to be processed, so that when there is a single battery that does not meet the preset conditions, the current adjustment circuit corresponding to the single battery is used to adjust the current adjustment circuit of the single battery. Cell voltage, so that current compensation control can be carried out for cells with low cell voltage, which can realize different actual output currents of different cells, ensure the consistency of cell voltage, and achieve the effect of extending the overall fuel life.

Embodiment 2

Figure 4 is a flow chart of a cell voltage control method applied to a fuel cell provided in Embodiment 2 of the present application; this embodiment can be used when the fuel cell is used for a long time or is started at low temperature or when the fuel cell has not been used for a long time and is started for the first time. , the single cell voltage will be inconsistent, and current compensation is performed for single cells with low cell voltage. The method may be performed by a cell voltage control device of a fuel cell in the vehicle. The cell voltage control device of the fuel cell may be implemented in the form of hardware and/or software, and the device may generally be integrated in the vehicle. As shown in Figure 4, the method includes:

S210. When it is detected that the fuel cell supplies power based on the start signal, obtain the cell voltage data of each cell.

The start signal may be provided by the vehicle controller to notify the fuel cell that it needs to perform a power supply function to the vehicle. Cell voltage data refers to the voltage value between the positive pole and the negative pole of a cell voltage, which can be collected by the monitoring device corresponding to the cell.

For example, for a fuel cell, a fuel cell stack is configured in the fuel cell, and the fuel cell stack is composed of multiple single cells. Multiple single cells can be divided arbitrarily to form a battery pack to be processed. A battery pack to be processed can be configured with a current adjustment circuit, and the fuel cell stack of the fuel cell can be divided into multiple battery packs to be processed corresponding to the current adjustment circuits. When each current adjustment circuit of the fuel cell detects that the fuel cell receives an instruction to start the fuel cell from the vehicle's vehicle controller, it can obtain the voltage value between the positive pole and the negative pole of each single cell.

S220. Based on the cell voltage data, determine the single cells to be processed that do not meet the preset conditions, and determine the to-be-operated current adjustment circuit corresponding to the single cells to be processed.

Among them, the preset condition is a preset single cell voltage value. For example, the preset condition can be the voltage deviation value of a single cell; or the minimum value of the voltage value of a single cell can be determined first, and whether the minimum voltage value is less than the preset value is used as the preset condition. Among them, single cells that do not meet the preset conditions are used as single cells to be processed. Correspondingly, the single cells to be processed correspond to a current adjustment circuit, and the corresponding current adjustment circuit is used as the current adjustment circuit to be worked. The voltage value of the single cell to be processed is adjusted based on the current adjustment circuit to be operated.

For example, obtain the voltage value of each single cell, based on the above preset conditions, compare the obtained voltage value of each single cell with the preset conditions, and select the unprocessed cells that do not meet the preset conditions. body battery. The battery pack to be processed corresponding to the single battery to be processed can be known, and the corresponding current to be processed corresponding to the single battery to be processed can also be known, so as to adjust the current of the single battery to be processed based on the current to be processed adjustment circuit. Voltage value.

S230. Control the working state of the to-be-operated current adjustment circuit to adjust the cell voltage data of the to-be-processed single cell based on the to-be-operated current adjustment circuit until the cell voltage data meets the stop adjustment condition.

In this embodiment, controlling the working state means that the current to be operated adjustment circuit provides a compensation current for the corresponding battery pack to be processed, and the current value compensated by the current to be operated adjustment circuit can be adaptively adjusted. The stop adjustment condition is a preset condition regarding the single cell. For example, the stop adjustment condition may include: whether the single cell number with the smallest cell voltage data changes, and whether the deviation value of the single cell becomes smaller.

For example, the current adjustment circuit to be operated can adjust the cell voltage data of the single cell to be processed through the compensation current. During the adjustment process, it is necessary to determine whether the compensation current provided by the current adjustment circuit to be operated can make the cell voltage data meet the preset value. conditions, and then adjust the compensation current value of the current adjustment circuit to be operated according to the cell voltage data, until the cell voltage data satisfies the cell voltage data, the cell number with the smallest cell voltage changes or the deviation value of the cell becomes smaller, and the current adjustment The circuit ends the function of compensating current.

In this embodiment, when it is detected that the fuel cell supplies power based on the start signal, the cell voltage data of each cell is obtained; based on the cell voltage data, the cell to be processed that does not meet the preset conditions is determined. And determine the waiting current adjustment circuit corresponding to the single battery to be processed; control the working state of the waiting current adjustment circuit to adjust the single voltage data of the single battery to be processed based on the waiting current adjustment circuit until the single voltage data Meeting the stop adjustment conditions can cope with large voltage deviations of fuel cell cells, maintain cell voltage consistency, and avoid local cell voltages that are too low. When the fuel cell decays, the cells with obvious decay can be The battery performs current control, which improves the overall performance of the fuel cell and thereby increases the service life of the fuel cell.

Embodiment 3

Figure 5 is a flow chart of a cell voltage control method applied to a fuel cell provided in Embodiment 3 of the present application; the embodiment of the present application adjusts S220 and S230 on the basis of the above embodiment. The embodiment of the present application can be used with Combination of various optional examples in one or more of the above embodiments. As shown in Figure 5, the method includes:

S310. When it is detected that the fuel cell supplies power based on the start signal, obtain the cell voltage data of each cell.

S320. Determine the maximum voltage value based on the voltage data of each cell;

S330. Based on the maximum voltage value and the voltage data of each cell, determine the voltage deviation value corresponding to each cell;

S340. Use single cells with voltage deviation values greater than the preset deviation threshold as single cells to be processed; and/or use single cells with cell voltage data smaller than the preset voltage value as single cells to be processed.

In this embodiment, each current adjustment circuit of the fuel cell can obtain the voltage value between the positive electrode and the negative electrode of each associated single cell. When the single cell voltage data of all single cells in the fuel cell stack is obtained, Finally, the obtained cell voltage data are sorted from small to large according to their numerical values. There must be a maximum value, and the maximum voltage value of this single cell is regarded as the maximum voltage value. The voltage data of each cell can be obtained from the corresponding current adjustment circuit. By performing a difference operation between the maximum voltage value and the voltage data of each cell, the voltage deviation value corresponding to each cell can be obtained. The preset deviation threshold may be a preset voltage value, for example, 0.3V. The preset voltage value can also be a preset voltage value, for example, 0.2V.

In the actual application process, the voltage deviation value corresponding to the single cell of the fuel cell is compared with the preset deviation threshold to determine whether the voltage deviation value of each single cell is greater than the preset deviation threshold. If it is greater than the preset deviation value, , then the corresponding single cell is used as the single cell to be processed. In the same way, compare the voltage deviation value corresponding to the single cell of the fuel cell with the preset voltage value to determine whether the voltage deviation value of each single cell is less than the preset voltage value, and then use the corresponding single cell as Single cells to be processed.

For example, assuming that there are five single cells in the fuel cell, and the voltages of the five single cells are 0.8V, 0.7V, 0.5V, 0.4V and 0.6V respectively, then the maximum voltage value is 0.8V, and the single cell voltage The voltage deviation values of each single cell with data of 0.7V, 0.5V, 0.4V and 0.6V are 0.1V, 0.3V, 0.4V and 0.2V. Assume that the preset deviation threshold is 0.3V and the preset voltage value is 0.2V. Then the single cell with a voltage deviation value greater than the preset deviation threshold of 0.3V is a single cell corresponding to a single cell voltage data of 0.4V, which can be used as a single cell to be processed; the voltage deviation value is smaller than the preset voltage value. The single cell with the cell voltage data of 0.2V is the single cell corresponding to the cell voltage data of 0.7V, which can be used as the single cell to be processed.

S350: Determine the corresponding current adjustment circuit to be operated according to the serial number information corresponding to the single battery to be processed.

In this embodiment, unique numbering information can be set for each single cell in the fuel cell stack. For example, the single cells in the fuel cell stack can be numbered 1, 2, 3... from left to right. Based on the unique numbering information, the battery pack to be processed corresponding to the corresponding numbered single cell can be determined, and then the current adjustment circuit corresponding to the numbered single cell can be determined.

S360: Adjust the current of the corresponding single cell to be processed based on the current adjustment circuit to be worked, and obtain the cell voltage data of each single cell during the adjustment process.

In this embodiment, the current adjustment circuit to be operated can adjust the cell voltage data of the single cell to be processed through the compensation current. In the process of adjusting each single cell, the single cell corresponding to each single cell Voltage monitoring equipment can continuously monitor the cell voltage data of each cell.

S370. If it is determined based on the cell voltage data that the cell to be processed has not changed, adjust the current value of the current adjustment circuit to be operated until the cell to be processed changes.

In this embodiment, because in the process of current compensation of the single cell to be processed by the current adjustment circuit to be operated, the voltage value of the single cell to be processed will be gradually changed, thereby changing the voltage deviation value of the single cell to be processed. If If the number of the single cell to be processed has not changed, that is, the current single cell to be processed is still the single cell with the largest voltage deviation value, this indicates that the compensation current of the current adjustment circuit to be worked needs to be increased until the current single cell to be processed is The number has changed.

S380. If the voltage deviation value of each single cell to be processed decreases after the change, gradually adjust the current value until the stop adjustment condition is met.

In this embodiment, if the number of the single cell to be processed changes after the action of the current to be operated adjustment circuit, and the voltage deviation value of each single cell to be processed decreases, it means that the current to be operated adjustment circuit has realized the function of the unit to be processed. The adjustment function of the single battery, that is, the single battery to be processed determined by the to-be-operated current adjustment circuit is correct, and the voltage deviation value of the single-cell battery can be reduced by compensating the current. At this time, the to-be-operated current adjustment circuit can be The compensation current value is reduced until the battery's power When the voltage data meets the conditions for stopping adjustment, the current adjustment circuit to be operated can stop adjusting the current value of the battery pack to be processed corresponding to the current adjustment circuit to be operated.

It should be noted that in actual application, when adjusting the compensation current of the current adjustment circuit to be operated, the compensation current can be slowly reduced, because if the compensation current is directly set to 0A, it may cause damage to the fuel cell, so The compensation current needs to be gradually reduced until the compensation current function is stopped.

In one embodiment, the stop adjustment condition includes: the current value decreases to a preset current value or the voltage deviation value no longer decreases.

In this embodiment, in the process of current compensation for the associated single cell by the current to be operated adjustment circuit, it is necessary to determine whether the current compensated by the current to be operated adjustment circuit can reduce the voltage deviation value of the single cell. If the voltage deviation value of the single cell no longer decreases, it means that the current compensated by the working current adjustment circuit has played a role in reducing the single cell deviation value, and the current compensation function has been completed. At this time, the adjustment can be stopped. Or stop the adjustment function of the to-be-operated current adjustment circuit according to the current value preset for the to-be-operated current adjustment circuit. For example, the preset current value can be 0A. When the to-be-operated current adjustment circuit gradually reduces the compensation current, when When the compensation current value is 0A, the adjustment function of the to-be-operated current adjustment circuit is stopped.

In this embodiment, when it is detected that the fuel cell supplies power based on the start signal, the cell voltage data of each cell is obtained; the maximum voltage value is determined based on the voltage data of each cell; based on the maximum voltage value and the voltage data of each cell, Determine the voltage deviation value corresponding to each single cell; use the single cell whose voltage deviation value is greater than the preset deviation threshold as the single cell to be processed; and/or select the single cell whose cell voltage data is less than the preset voltage value. The battery is used as a single battery to be processed. According to the serial number information corresponding to the single cell to be processed, the corresponding current adjustment circuit to be operated is determined. Based on the current adjustment circuit to be operated, the current of the corresponding single cell to be processed is adjusted, and the cell voltage data of each single cell is obtained during the adjustment process; if based on the cell voltage data, it is determined that the single cell to be processed has not changed. , adjust the current value of the current adjustment circuit to be worked until the single cell to be processed changes; if the voltage deviation value of each single cell to be processed decreases after the change, the current value is gradually adjusted until the stop adjustment condition is met. The embodiments of the present application can cope with the situation of large voltage deviation of fuel cell cells, maintain the consistency of cell voltage, and avoid local cell voltages that are too low, and when the fuel cell decays, the cells with obvious decay can be Current control improves the overall performance of the fuel cell, thereby increasing the service life of the fuel cell.

Embodiment 4

In the embodiment of this application, the process of introducing the cell voltage control method of the fuel cell in an implementation manner is shown in Figure 6. In this embodiment, low temperature starting is used as an example to introduce how the current adjustment circuit affects the combustion battery for current compensation. When the fuel cell starts at low temperature, the vehicle controller controls the fuel cell to load current. For example, the loading current can be I0. When the fuel cell stack experiences local low voltage or polarity reversal, the current adjustment circuit performs current compensation on the fuel cell. , for example, the compensation current can be I1, then the actual output current of the single cell in the fuel cell stack is I0-I1; at this time, the current adjustment circuit adjusts the compensation current according to the cell voltage deviation value until the compensation current is 0, ending the current adjustment circuit compensation current function.

Embodiments of the present application provide a flow chart of a cell voltage control method for a type of fuel cell, see Figure 7 . After the low-temperature start begins, the vehicle controller controls the fuel cell to load according to the target current. At this time, the cell voltage monitoring equipment configured on the cell begins to monitor the voltage of the cell. The vehicle controller can determine that the cell voltage deviation value is greater than a predetermined value V1 (for example, 0.3V) or the lowest cell voltage is lower than a predetermined value V2 (for example, 0.2V). If the judgment condition is not reached, continue to monitor the cell voltage, and then judge the stack temperature until the stack temperature is higher than the preset value T0 (for example, 40°C), and the startup is completed. If the judgment condition is met, the current adjustment circuit performs current compensation on the single cell with the lowest voltage value, and the initial compensation current is I1 (for example, 5A); if the number of the single cell with the lowest voltage value is still the lowest single cell number with the voltage value before compensation , then increase the compensation current until the cell number with the lowest voltage value is different from the cell number with the lowest voltage value before compensation, that is, the cell number with the lowest voltage value is replaced with another cell through current compensation; if the cell number with the lowest voltage value is If the cell number changes, determine whether the cell voltage deviation becomes smaller. If it becomes smaller, adjust the compensation current until the compensation current reduces to 0 or the cell voltage deviation no longer becomes smaller; if the cell voltage deviation no longer becomes smaller, If it does not become smaller, monitor the stack temperature, and perform deviation judgment and current compensation operations again until the stack temperature is higher than the preset value T0 (for example, 40°C), and the start-up is completed.

In this embodiment, when the fuel cell is started at low temperature, the vehicle controller controls the fuel cell to load current. If the fuel cell stack experiences local low voltage or reverse polarity, the current adjustment circuit adjusts the compensation according to the single cell voltage deviation value. current until the single cell voltage deviation remains unchanged, ending the compensation current function of the current adjustment circuit. This embodiment can cope with the situation of large voltage deviation of the fuel cell cells, maintain the consistency of the cell voltage, and avoid the local low cell voltage. When the fuel cell decays, the single cells with obvious decay can be repaired. Current control improves the overall performance of the fuel cell, thereby increasing the service life of the fuel cell.

Embodiment 5

FIG. 8 is a schematic structural diagram of a cell voltage control device applied to a fuel cell provided in Embodiment 5 of the present application. The device can execute the cell voltage control method applied to a fuel cell provided in the embodiment of the present application. The device includes:

The voltage data determination module 410 is configured to provide power to the fuel cell based on the start signal when it is detected that When, obtain the cell voltage data of each cell;

The adjustment circuit determination module 420 is configured to determine the single cells to be processed that do not meet the preset conditions based on the cell voltage data, and determine the current adjustment circuit to be operated corresponding to the single cells to be processed;

The voltage data adjustment module 430 is configured to control the working state of the current adjustment circuit to be operated, so as to adjust the cell voltage data of the single cell to be processed based on the current adjustment circuit to be operated until the cell voltage data meets the stop adjustment condition.

Based on the above embodiments, the adjustment circuit determination module 420 includes: a maximum voltage determination unit, a voltage deviation value determination unit, a battery to be processed determination unit and an adjustment circuit determination unit.

The maximum voltage determination unit is configured to determine the maximum voltage value based on the voltage data of each cell;

a voltage deviation value determination unit configured to determine the voltage deviation value corresponding to each single cell based on the maximum voltage value and each single cell voltage data;

The battery determination unit to be processed is configured to use a single battery with a voltage deviation value greater than a preset deviation threshold as a single battery to be processed; and/or to use a single battery with a single voltage data smaller than a preset voltage value as a single battery to be processed. handling of single cells;

The adjustment circuit determination unit is configured to determine the corresponding current adjustment circuit to be operated based on the number information corresponding to the single cell to be processed.

Based on the above embodiments, the voltage data adjustment module 430 includes: a battery adjustment unit to be processed and a current value adjustment unit.

The battery adjustment unit to be processed is configured to adjust the current of the corresponding single cell to be processed based on the current adjustment circuit to be operated, and to obtain the cell voltage data of each single cell during the adjustment process;

The current value adjustment unit is set to adjust the current value of the current adjustment circuit to be operated until the single battery to be processed changes when it is determined that the single battery to be processed has not changed based on the single cell voltage data; if the single battery to be processed changes, If the voltage deviation value of the battery decreases, the current value will be gradually adjusted until the conditions for stopping adjustment are met.

Based on the above embodiments, the conditions for stopping adjustment include: the current value decreases to a preset current value or the voltage deviation value no longer decreases.

The embodiment of the present application discloses a cell voltage control device applied to a fuel cell. When it is detected that the fuel cell is providing power based on a start signal, the cell voltage data of each cell is obtained; based on the cell voltage data, it is determined whether Single cells to be processed that meet preset conditions, and the current to be processed corresponding to the single battery to be processed is determined; the working state of the current to be processed is controlled to adjust the single battery to be processed based on the current to be processed adjustment circuit cell voltage data until the cell voltage data meets the conditions for stopping adjustment. The embodiments of the present application can cope with the situation of large voltage deviation of fuel cell cells. The consistency of the cell voltage can be maintained to avoid local cell lows. When the fuel cell decays, the overall performance of the fuel cell can be improved by controlling the current of the significantly decayed cells, thereby extending the service life of the fuel cell. , improving the vehicle’s driving experience and user safety.

Embodiment 6

FIG. 9 is a schematic structural diagram of a fuel cell manufacturing device provided in Embodiment 6 of the present application. This device can be applied to the fuel cell provided in the embodiment of the present application. The device includes: a battery pack to be processed determining device 510 and a cell voltage adjusting device 520.

The battery group determination device 510 to be processed is configured to divide the at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery group to be processed includes at least one single battery;

The cell voltage adjustment device 520 is configured to configure a current adjustment circuit for each of the battery packs to be processed, so that when there is a single cell that does not meet the preset conditions, the current adjustment circuit corresponding to the single cell is used. Adjust the cell voltage of the single cell.

Based on the above embodiments, the device 510 for determining the battery pack to be processed includes a battery pack dividing unit configured to: divide the at least two single cells into at least two to be processed based on the position information of the at least two single cells in the fuel cell. Battery.

Based on the above embodiments, the current adjustment circuit in the single voltage adjustment device 520 is at least one of the following circuits:

It consists of current output module, short circuit function module and discharge module;

It consists of current output module, diode to prevent reverse current, resistor and voltage acquisition module.

This embodiment provides a fuel cell manufacturing device. The fuel cell includes at least two single cells. The at least two single cells are divided into at least two groups to obtain at least two battery groups to be processed; wherein, The battery pack to be processed includes at least one single cell; a current adjustment circuit is configured for each battery pack to be processed, so that when there is a single cell that does not meet the preset conditions, the single cell is adjusted based on the current adjustment circuit corresponding to the single cell. The single cell voltage of the single cell is used to perform current compensation control on single cells with low single cell voltages, so that the actual output current of different single cells is different, ensuring the consistency of the single cell voltage, and extending the overall fuel life. Effect.

Embodiment 7

Figure 10 is a schematic structural diagram of an electronic device provided in Embodiment 7 of the present application. Electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, Smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are examples only and are not intended to limit the implementation of the present application as described and/or claimed herein.

As shown in Figure 10, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a read-only memory (Read-Only Memory, ROM) 12, a random access memory (Random Access Memory, RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can be loaded into the random access memory (RAM) according to the computer program stored in the read-only memory (ROM) 12 or from the storage unit 18. A computer program in RAM) 13 to perform various appropriate actions and processes. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via the bus 14. An input/output (I/O) interface 15 is also connected to the bus 14 .

Multiple components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc. etc.; and communication unit 19, such as network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices through computer networks such as the Internet and/or various telecommunications networks.

Processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU), various dedicated artificial intelligence (Artificial Intelligence, AI) computing chips, various running Machine learning model algorithm processor, digital signal processor (Digital Signal Processor, DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes various methods and processes described above, such as a cell voltage control method applied to a fuel cell.

In some embodiments, the cell voltage control method applied to the fuel cell may be implemented as a computer program, which is tangibly included in a computer-readable storage medium, such as the storage unit 18 . In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the above-described cell voltage control method applied to the fuel cell may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the cell voltage control method applied to the fuel cell in any other suitable manner (eg, by means of firmware).

Various implementations of the systems and techniques described above may be implemented in digital electronic circuit systems, integrated circuit systems, Field Programmable Gate Arrays (FPGAs), special purpose Integrated circuit (Application Specific Integrated Circuit, ASIC), application specific standard product (ASSP), system on chip (System on Chip, SOC), load programmable logic device (Complex Programmable Logic Device, CPLD), Implemented in computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include implementation in one or more computer programs executable and/or interpreted on a programmable system including at least one programmable processor, the programmable processor The processor, which may be a special purpose or general purpose programmable processor, may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device. An output device.

Computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that the computer program, when executed by the processor, causes the functions/operations specified in the flowcharts and/or block diagrams to be implemented. A computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

The storage medium may be a non-transitory storage medium.

In the context of this application, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium may be a machine-readable signal medium. Examples of machine-readable storage media would include one or more wire-based electrical connections, portable computer disks, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (Erasable Programmable Read-Only Memory (EPROM) or flash memory, optical fiber, portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above .

To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having a display device (eg, a cathode ray tube (CRT) or a liquid crystal) for displaying information to the user. A liquid crystal display (LCD) monitor); and a keyboard and pointing device (eg, a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, etc.) feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., A user's computer having a graphical user interface or web browser through which the user can interact with implementations of the systems and technologies described herein), or including such backend components, middleware components, or any combination of front-end components in a computing system. The components of the system may be interconnected by any form or medium of digital data communication (eg, a communications network). Examples of communication networks include: Local Area Network (LAN), Wide Area Network (WAN), blockchain network, and the Internet.

Computing systems may include clients and servers. Clients and servers are generally remote from each other and typically interact over a communications network. The relationship of client and server is created by computer programs running on corresponding computers and having a client-server relationship with each other. The server can be a cloud server, also known as cloud computing server or cloud host. It is a host product in the cloud computing service system to solve the problems existing in traditional physical host and virtual private server (VPS) services. It has the disadvantages of difficult management and weak business scalability. It should be understood that various forms of the process shown above may be used, with steps reordered, added or deleted. For example, each step described in this application can be executed in parallel, sequentially, or in a different order, which is not limited herein. The above-mentioned specific embodiments do not constitute a limitation on the scope of protection of the present application. It will be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions are possible depending on design requirements and other factors.

Claims (13)

1. A method of manufacturing a fuel cell. The fuel cell includes at least two single cells, including:

   Divide the at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery group to be processed includes at least one single battery;

   Configuring a current adjustment circuit for the battery pack to be processed respectively, so as to adjust the cell voltage of the single cell based on the current adjustment circuit corresponding to the single cell when there is a single cell that does not meet the preset conditions. .
2. The method according to claim 1, wherein said dividing the at least two single cells into at least two groups to obtain at least two battery groups to be processed includes:

   According to the position information of the at least two single cells in the fuel cell, they are divided into at least two battery groups to be processed.
3. The method according to claim 1, wherein the current adjustment circuit is at least one of the following circuits:

   It consists of current output module, short circuit function module and discharge module;

   It consists of current output module, diode to prevent reverse current, resistor and voltage acquisition module.
4. A cell voltage control method applied to a fuel cell, wherein the fuel cell includes at least two battery groups to be processed and a current adjustment circuit corresponding to the battery group to be processed, and the battery group to be processed includes at least one unit body battery, the method includes:

   In response to detecting that the fuel cell supplies power based on the start signal, obtain cell voltage data of the plurality of cell cells;

   Based on the cell voltage data, determine the single cells to be processed that do not meet the preset conditions, and determine the current adjustment circuit to be operated corresponding to the single cells to be processed;

   Control the working state of the to-be-operated current adjustment circuit to adjust the cell voltage data of the to-be-processed single cell based on the to-be-operated current adjustment circuit until the cell voltage data meets the stop adjustment condition.
5. The method of claim 4, wherein determining, based on the cell voltage data, single cells to be processed that do not meet preset conditions includes:

   Determine the maximum voltage value based on multiple cell voltage data;

   Based on the maximum voltage value and the plurality of cell voltage data, determine the voltage deviation value corresponding to the plurality of cell cells;

   The single cell with a voltage deviation value greater than the preset deviation threshold is used as the single cell to be processed.
6. The method according to claim 4 or 5, wherein determining, based on the cell voltage data, single cells to be processed that do not meet preset conditions includes:

   The single cells whose cell voltage data is less than the preset voltage value are used as single cells to be processed.
7. The method according to claim 4, wherein determining the current adjustment circuit to be operated corresponding to the single cell to be processed includes:

   According to the serial number information corresponding to the single cell to be processed, the corresponding current adjustment circuit to be operated is determined.
8. The method according to claim 4, wherein the operating state of the to-be-operated current adjustment circuit is controlled to adjust the cell voltage data of the to-be-processed single cell based on the to-be-operated current adjustment circuit until the The above cell voltage data meets the conditions for stopping adjustment, including:

   Adjust the current of the corresponding single cell to be processed based on the current adjustment circuit to be operated, and obtain the cell voltage data of multiple single cells during the adjustment process;

   In response to determining that the single cell to be processed has not changed based on the cell voltage data, adjusting the current value of the current adjustment circuit to be operated until the single cell to be processed changes;

   In response to the decrease in the voltage deviation value of the single cell to be processed after the change, the current value is gradually adjusted until the stop adjustment condition is met.
9. The method according to claim 8, wherein the stop adjustment condition includes: the current value decreases to a preset current value or the voltage deviation value no longer decreases.
10. A cell voltage control device used in fuel cells, including:

    a voltage data determination module configured to obtain cell voltage data of a plurality of single cells in response to detecting that the fuel cell supplies power based on the start signal;

    The adjustment circuit determination module is configured to determine the single cells to be processed that do not meet the preset conditions based on the cell voltage data, and determine the to-be-operated current adjustment circuit corresponding to the single cells to be processed;

    The voltage data adjustment module is configured to control the working state of the current adjustment circuit to be operated, and adjust the cell voltage data of the single cell to be processed based on the current adjustment circuit to be operated until the cell voltage data meets the conditions for stopping adjustment.
11. A fuel cell manufacturing device, including:

    The battery group to be processed determining device is configured to divide at least two single cells into at least two groups to obtain at least two battery groups to be processed; wherein the battery group to be processed includes at least one single battery;

    The cell voltage adjustment device is configured to configure a current adjustment circuit for the battery pack to be processed, so that when there is a single cell that does not meet the preset conditions, the current adjustment circuit corresponding to the single cell adjusts the current adjustment circuit. The cell voltage of the single cell.
12. An electronic device including:

    at least one processor; and

    a memory communicatively connected to the at least one processor; wherein,

    The memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor, so that the at least one processor can execute any one of claims 4-9 The described cell voltage control method is applied to fuel cells.
13. A computer-readable storage medium that stores computer instructions, and the computer instructions are used to enable a processor to implement the unit applied to a fuel cell according to any one of claims 4-9 when executed. Body voltage control method.